Propylene polymer composition

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a propylene polymer composition which has not only an excellent adhesion to polyurethane without the use of a primer, but also has a good weathering resistance. More specifically, the present invention relates to a propylene polymer composition which comprises (A) a modified propylene polymer obtained by treating (1) a propylene polymer or a mixture of a propylene homopolymer and a ethylene-propylene copolymer rubber with (2) an organic compound having at least one unsaturated bond in the molecule and a hydroxyl group and (3) an organic peroxide and (B) a propylene polymer, and may further comprises one or more of (C) an amorphous ethylene-propylene copolymer having a propylene content of 20% to 50% by weight and a Mooney viscosity at ML.sub.1+4 at 100.degree. C. of 20 to 100, (D) a high-density ethylene polymer having a density of 0.935 g/cm.sup.2 or more, (E) a linear low-density ethylene copolymer having a density of not less than 0.900 g/cm.sup.3 but less than 0.935 g/cm.sup.2, a melting point of 106.degree. C. to 130.degree. C., a melt flow rate of 0.01 to 100 g/10 min and substantially having 3 to 35, based on 1000 carbon atoms of the backbone carbon chain, of the side-chain alkyl groups having 1 to 10 carbon atoms, and (F) an inorganic filler. The resultant propylene polymer composition not only has excellent mechanical characteristics such as rigidity and impact resistance, but also has an excellent adhesion to polyurethane without the use of a primer. Furthermore, when the high-density ethylene polymer and/or the linear low-density ethylene copolymer are incorporated into the composition, an excellent usual appearance, especially an excellent glossiness can be obtained.
2. Description of the Related Art
As is well known, propylene polymers (propylene homopolymers, propylene copolymers) not only have an excellent moldability but also have good mechanical characteristics, heat resistance, solvent resistance, oil resistance, and chemical resistance, and therefore, are produced widely in industry and utilized in various fields such as industrial parts for automobiles, electrical instruments, and electrical machines, as well as commodities. However, since the molecules thereof have no polar group (so called non-polar type), they have a poor adhesion to polyurethanes and thus various problems arise. These problems are described herein by referring to bumpers for automobiles, as widely utilized, by way of example.
Heretofore, bumpers made of metals or polyurethanes have been widely used. In recent years, due to the demands for weight reductions and cost-reductions of automobiles, bumpers made of propylene polymers (propylene homopolymers, ethylene-propylene random or block copolymers) or a composition mainly comprising propylene polymers have been widely utilized. These bumpers are frequently used after a previous embossing as originally attached without the application of a coating. However, to impart a further brilliance and a sense of high quality, in many cases the bumpers are mounted on cars after the application of a coating of a polyurethane coating material which is in line with the increasing demand for higher quality automobiles.
However, the molecules of propylene polymers have no polar group, as mentioned above, and thus are chemically very inactive polymeric substances. Therefore, when coating a polyurethane, it is well known in the art to apply a pretreatment to the molded product, such as an electrical treatment (e.g., corona discharge treatment, plasma treatment), mechanical surface roughening, flame treatment, and oxygen or ozone treatment. Further, prior to these surface treatments, it is recommended to wash the surface with a solvent such as an alcohol or aromatic hydrocarbon. Further, it is known to dip the molded product in an organic solvent such as 1.1.1-trichloroethane, perchloroethylene, pentachloroethylene, etc., at a temperature near boiling point or expose it to a solvent vapor (for example, "Course of Plastic Materials Vol. 7, Polypropylene Resin", p. 218 to 219, ed. by Kaneyuki Takagi & Heizo Sasaki, 1969, published by Nikkan Kogyo Shimbun K. K.). However, according to these methods, not only is a special treatment equipment required, but also a considerable time is required for such treatment.
Further, according to current practice, the molded product (bumper) is applied with a sub-coating of a primer which will adhere to the propylene polymer and a polyurethane coating material is applied as the top coating. That is, the following steps are required; primer sub-coating.fwdarw.baking.fwdarw.polyurethane coating.fwdarw.baking (2 coats-2 bakings or 3 coats-2 bakings), and the coating steps require a long time (usually about 1 hour and 30 minutes). For this reason, the coating cycle is prolonged the production of bumpers coated with polyurethane, whereby not only is bulk production rendered difficult but also the cost is increased.
In the production of other automobile parts, tricycle parts, electrical instrument parts, and electronic instrument parts, similar problems are involved when propylene polymers are employed and coated with polyurethane, although the coating method may be different.
In general, polypropylene polymers or compositions thereof utilized for bumpers, etc., incorporate UV-absorbers, UV-stabilizers, and antioxidants, etc., according to a combination of any desired recipe, for a reinforcement of the weathering resistance. After several years of actual use, however, the surface of the molded product will be discolored or chalking or cracks may form thereon. Thus, a satisfactory result cannot be obtained under the present situation. Further, there is an increasing demand for a better grade of bumper, particularly as the taste for higher quality cars is augmented and the frequency of use in bad weather areas increases.
Accordingly, to cope with such a trend, it may be considered to increase the amount of weather-resistant formulation or add new additives. However, a mere increase in the amount or addition of these may cause problems in appearance in molding (e.g., lustre irregularity or whitening of the surface), or the increased amount of or newly added additives may bleed out on the surface of the molding to worsen the appearance or result in whitening of the surface of the molded product after prolonged actual usage.
SUMMARY OF THE INVENTION
Accordingly, the objects of the present invention are to eliminate the above-mentioned disadvantages of the prior art and to provide a propylene polymer composition capable of not only retaining or improving various mechanical characteristics possessed by polypropylene polymer (e.g., impact strength, rigidity), but also having a good moldability, an excellent weathering resistance, and at the same time, will adhere to polyurethanes without the use of a primer.
Another object of the present invention is to provide a propylene polymer composition capable of providing an excellent gloss to, for example, the molded products.
Other objects and advantages of the present invention will be apparent from the following description.
In accordance with the present invention, there is provided a propylene polymer composition comprising:
(A) a modified propylene polymer obtained by treating:
(1) 100 parts by weight of a propylene polymer or a mixture of a propylene polymer and a ethylene-propylene copolymer rubber, with
(2) 0.1 to 50 parts by weight of an organic compound having at least one unsaturated bond in the molecule and a hydroxyl group and
(3) 0.01 to 20 parts by weight of an organic peroxide; and
(B) a propylene polymer, wherein the content of the component (A) in the composition is 5 to 50% by weight.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention will now be explained in detail.
(A) Modified Propylene Polymer
The modified propylene polymer in the present invention is obtained by treating a propylene polymer or a mixture of a propylene polymer with an ethylene-propylene copolymer rubber as hereinafter described with the hydroxyl compound and an organic peroxide compound, and the process for production thereof is described in detail in Japanese Unexamined Patent Publication (Kokai) No. 58-154732.
(1) Propylene Polymer
The propylene polymer usable for the preparation of the modified propylene polymer of the present invention is selected from propylene homopolymers, block copolymers mainly composed of propylene with ethylene and/or .alpha.-olefins and random copolymers mainly composed of propylene with ethylene and/or .alpha.-olefins. Also, in these block copolymers and random copolymers, the ratio of ethylene and .alpha.-olefins copolymerized is at most 20% by weight (preferably 15% by weight or less) as the total amount. Further, the .alpha.-olefins have 4 to 12 carbon atoms. Typical examples of the .alpha.-olefins include butene-1, hexene-1, 4-methylhexene-1 and octene-1.
These propylene polymers are produced in industry and utilized in a variety of fields. Also, the physical properties and production processes of these propylene polymers are well known in the art.
It is also possible to use a mixture of a propylene homopolymer with an ethylene-propylene copolymer rubber as described below at a ratio as specified below in place of the propylene polymer. In this case, the ethylene-propylene copolymer rubber is composed mainly of ethylene and propylene. Such ethylene-propylene copolymer rubbers are classified broadly into copolymer rubbers obtained by copolymerization of ethylene and propylene and multi-component copolymer rubbers obtained by copolymerization of ethylene and propylene as the main components with small amounts (generally not more than 10% by weight) of straight or branched diolefins having two double bonds at the ends such as 1,4-pentadiene, 1,5-hexadiene and 3,3-dimethyl-1,5-hexadiene; straight or branched diolefins containing a double bond at the end such as 1,4-hexadiene and 6-methyl-1,5-heptadiene; or monomers having double bonds such as cyclic diene hydrocarbons (e.g., bicyclo[2,2,1]-heptene-2(norbornene)) or derivatives thereof (e.g., ethylidene norbornene). In either the case of the copolymer rubber or the case of the multi-component copolymer rubber, the propylene content is 20 to 50% by weight and a Mooney viscosity [ML.sub.1+4 (100.degree. C.)] of 10 to 50, preferably 10 to 40, particularly preferably 15 to 40. When an ethylene-propylene copolymer rubber has a Mooney viscosity of less than 10, although the moldability is good, an improvement of the adhesion strength to a urethane coating material as described below cannot be satisfactorily effected. On the other hand, when a copolymer with a Mooney viscosity of over 50 is used, flow marks or other defects may be generated on the surface of a molding to give an undesirable appearance.
In producing the modified propylene polymer of the present invention, the ratio of the ethylene-propylene copolymer rubber in the total amount of the above propylene homopolymer and the ethylene-propylene copolymer rubber is generally at most 40% by weight, desirably 1 to 40% by weight, particularly preferably 2 to 35% by weight. If the ratio of the ethylene-propylene copolymer rubber in the total amount of the above propylene homopolymer and the ethylene-propylene copolymer rubber exceeds 40% by weight, although the adhesion strength to the coating is good, not only are flow marks generated on the surface of a molding, but also the lustre is degraded.
The propylene polymer should preferably have a melt flow rate (measured according to ASTM D 1238 under the condition L; hereinafter called "MFR (1)") generally of 0.01 to 100 g/10 min., preferably 0.01 to 80 g/10 min., more preferably 0.02 to 60 g/10 min., in view of the moldability and mechanical characteristics of the composition obtained.
(2) Hydroxyl Compound
The hydroxyl compound is a compound having at least one unsaturated bond (double bond, triple bond) and a hydroxyl group. Examples of the hydroxyl compound include alcohols having 3 to 10 carbon atoms and having double bonds, alcohols having 3 to 10 carbon atoms having triple bonds, esters of unsaturated mono- or di-carboxylic acids having 3 to 24 carbon atoms with unsubstituted dihydric alcohols having 3 to 10 carbon atoms, esters of said unsaturated carboxylic acids with unsubstituted trihydric alcohols, unsubstituted tetrahydric alcohols and unsubstituted penta- or higher polyhydric alcohols each having 3 to 10 carbon atoms. Typical examples of such hydroxyl compounds are 2-hydroxyethyl(meth)acrylate, 2-hydroxypropyl(meth)acrylate, and 2-hydroxybutyl(meth)acrylate.
(3) Organic Peroxide
The organic peroxide may include those generally used as the initiator in radical polymerization and the crosslinking agent of a polymer, preferably one having a temperature for a half-life period of one minute of 100.degree. C. or higher, most preferably 130.degree. C. or higher. If the above temperature is lower than 100.degree. C., not only is handling of the peroxide difficult, but also an appreciable effect of its use cannot be recognized. Typical examples of such organic peroxide are ketone peroxides such as 1,1-bis-tert-butylperoxy-3,3,5-trimethylcyclohexane, dialkyl peroxides such as dicumyl peroxide, hydroperoxides such as 2,5-dimethylhexane-2,5-hydroperoxide, diacyl peroxides such as benzoyl peroxide, and peroxy esters such as 2,5-dimethyl-2,5-dibenzoyl peroxyhexane.
In the preparation of the mixture of the present invention, the mixing ratio of the hydroxyl compound per 100 parts by weight of the propylene polymer is 0.1 to 50 parts by weight, preferably 0.2 to 30 parts by weight, particularly 0.3 to 20 parts by weight. At a level lower than 0.1 part by weight of the hydroxyl compound per 100 parts by weight of the propylene polymer, only an insufficient adhesion improvement effect can be obtained. On the other hand, even if an amount of over 50 parts by weight is used, a further improvement effect proportional to the amount used cannot be recognized, but rather the characteristics inherent in the propylene homopolymer may be undesirably impaired.
The mixing ratio of the organic peroxide per 100 parts by weight of the propylene polymer is 0.01 to 20 parts by weight, desirably 0.05 to 10 parts by weight, particularly 0.1 to 7 parts by weight, particularly 0.1 to 7 parts by weight. With an amount of less than 0.01 part by weight of the organic peroxide per 100 parts by weight of the propylene polymer, not only is the improvement of the adhesion effect low, but also the durability or the adhesion strength of the mixture is reduced. On the other hand, an excessive amount of over 20 parts by weight will result in a lowering of the mechanical characteristics inherently possessed by the polymer. Thus, ratios outside the specified range are not desirable in either case.
The modified propylene polymer of the present invention can be produced by treating (or heating) the propylene polymer, the hydroxyl compound, and the organic peroxide as described above at a mixing ratio as specified above. In this case, treatment may be carried out while mixing the propylene polymer, the hydroxyl compound and the organic peroxide, or alternatively these may be previously mixed by way of dry blending or kneaded at a relatively lower temperature (at which the hydroxyl compound is not reactive) before heating the resultant mixture as described below.
When treatment is carried out at a high temperature, the propylene polymer may be sometimes degraded, nevertheless, the treatment must be carried out at a temperature at which the organic peroxide used for graft polymerization of the propylene polymer and the hydroxyl compound employed can be decomposed. For the above reasons, the treatment is carried out generally at 160.degree. to 300.degree. C., preferably 170.degree. to 280.degree. C., although this may differ depending on the organic peroxide employed.
The general formulae and typical examples of the above-mentioned hydroxyl compounds and organic peroxides as well as the mixing methods and treating methods are also described in Japanese Unexamined Patent Publication (Kokai) No. 58-154732. That is, the compositions may be dry blended by using any conventional dry mixer or blender such as a Henschel mixer or may be melt kneaded by using any conventional mixing apparatus such as a Banbury mixer, kneader, roll mill, or screw-type extruder. The compositions may be preferably prepared by first dry blending, followed by the melt kneading. Thus, the more uniform compositions can be obtained. Although there are no critical limitations to the blending or kneading temperature, the use of too a high temperature tends to cause the detrioration of the olefin polymers. However the neading should be conducted at a temperature sufficient to cause the desired graft polymerization between the olefin copolymers and the hydroxyl compounds, that is, at a temperature at which the organic peroxides can be decomposed. The typical melt kneading temperature is 160.degree. C. to 300.degree. C.
(B) Propylene Polymer
The propylene polymer usable, together with the modified propylene polymer, in the composition of the present invention is the same as the propylene polymer used in the preparation of the above modified propylene polymer except for MFR (1) (however, it is not necessarily the same as that employed in preparation of the modified propylene polymer). Of these propylene polymers, block copolymers and random copolymers may be preferably used.
The propylene polymer has an MFR (1), generally, of 1.0 to 100 g/10 min., desirably 1.0 to 80 g/10 min., particularly preferably 2.0 to 60 g/10 min. If a propylene polymer having an MFR (1) lower than 1.0 g/10 min. is used, not only will it be poorly kneaded with the above modified propylene polymer, but also the resultant composition obtained will not have a good moldability. On the other hand, with the use of a propylene polymer having an MFR (1) of over 100 g/10 min., the resultant composition has a poor mechanical strength.
(C) Ethylene Propylene Copolymer Rubber
The ethylene-propylene copolymer rubber usable as the component (C) in the present invention are these having a propylene content of 20% to 50% by weight and a Mooney viscosity ML.sub.1+4 at 100.degree. C. of 20 to 100, preferably 20 to 80, more preferably 30 to 75.
When the Mooney viscosity of the ethylene-propylene copolymer rubber is smaller than 20, the separation of the layers is likely to occur when cutting the gate although the processability is improved. Contrary to this, when the Mooney viscosity is larger than 100, the uniform dispersion becomes difficult when mixing or blending with the other components and, furthermore, the generation of the so-called flow mark and weld line on the surface of the molded products is noticeable even if the uniform dispersion can be effected.
The preferable propylene content of the ethylene-propylene copolymer rubber (i.e., the component (C)) is, generally, 20% to 50% by weight, preferably 25% to 45% by weight, and more preferably 25% to 40% by weight. As is well-known in the art, the ethylene-propylene copolymer rubber has elastic or rubbery characteristics and is industrially utilized in various fields. The production processes thereof are also well-known in the art. The ethylene-propylene copolymer rubber according to the present invention includes (i) copolymer rubber obtained by copolymerizing ethylene and propylene and (ii) multi-copolymer rubber obtained by copolymerizing ethylene and propylene, as the main constituent, with a minor amount (e.g., 10% by weight or less) of comonomers having double bonds such as linear or branched diolefins having two double bonds in the terminal thereof (e.g., 1,4-pentadiene, 1,5-hexadiene, and 3,3-dimethyl-1,5-hexadiene), linear or branched diolefins having at least two double bonds in the molecule provided that at least one double bond is in the terminal thereof and at least one double bond is in the internal thereof (e.g., 1,4-hexadiene and 6-methyl- 1,5-heptadiene), and cyclic diene hydrocarbons (e.g., bicyclo 2,2,1 -heptene-2, i.e., norbornene) and the derivatives thereof (e.g., ethylidene norbornene).
(D) High-density Ethylene Polymer
The high-density polymers usable as the component (D) in the present invention are those having a density of 0.935 g/cm.sup.2 or more, preferably 0.935 to 0.980 g/cm.sup.3, more preferably, 0.935 to 0.975 g/cm.sup.3. Such ethylene polymers generally include ethylene homopolymers and copolymers of ethylene with .alpha.-olefins (preferably having 3 to 12 carbon atoms, more preferably 3 to 8 carbon atoms). Preferable .alpha.-olefins are propylene, butene-1, hexene-1, 4-methylpentene-1, and octene-1.
The melt flow rate (i.e., MFR (2)), determined under the conditions E according to ASTM D 1238 method, of the high-density ethylene polymer is generally 0.1 to 100 g/10 min., preferably 0.5 to 80 g/10 min., more preferably, 1.0 to 60 g/10 min. When the MFR (2) of the ethylene polymer is less than 0.1 g/10 min., the uniform dispersion is difficult to obtain when mixing or blending with the other components and, furthermore, the generation of flow marks on the surface of the molded products is caused. Contrary to this, when the MFR (2) is more than 100 g/10 min., the uniform dispersion is again difficult to obtain when mixing or blending the other components and the impact strength of the resultant composition is decreased.
(E) Linear Low-density Ethylene Copolymer
The linear low-density ethylene copolymers usable as the component (E) in the present invention are those obtained by copolymerizing ethylene and .alpha.-olefins and having a density of not less than 0.900 g/cm.sup.3 but less than 0.935 g/cm.sup.3, preferably not less than 0.905 g/cm.sup.3 but less than 0.935 g/cm.sup.3. When the density of the linear low-density ethylene copolymer is less than 0.900 g/cm.sup.3, the stiffness of the resultant composition is not sufficient. Contrary to this, when the density is 0.935 g/cm.sup.3 or more, the flexibility of the resultant composition is insufficiently decreased although the stiffness is high.
The melting point of the linear low-density ethylene copolymer is generally 106.degree. C. to 130.degree. C., preferably 106.degree. C. to 125.degree. C., more preferably, 110.degree. C. to 125.degree. C. When the melting point of the linear low-density ethylene copolymer is lower than 106.degree. C., the stiffness as well as the thermal resistance of the resultant composition tend to become insufficient. Contrary to this, when the melting point is higher than 130.degree. C., the flexibility of the resultant composition tend to be decreased, although the stiffness is high. The MFR (2) (i.e., melt flow index, determined under the conditions E according to ASTM D 1238 method) of the linear low-density ethylene copolymer is generally 0.01 to 100 g/10min., preferably 0.1 to 50 g/10min., more preferably, 5 to 30 g/10min. When the MFR (2) of the linear low-density ethylene copolymer is less than 0.01 g/10 min, the moldability or processability of the resultant composition tends to decrease. When the MFR (2) is more than 100 g/10 min., an acceptable stiffness tends to be difficult to obtain although the moldability or processability is good.
The .alpha.-olefins usable in the production of the linear low-density ethylene copolymers generally include those having 12 or less carbon atoms. Typical examples of such .alpha.-olefins are propylene, butene-1, hexene-1, 4-methylpentene-1, and octene-1. The preferable copolymerization ratio of the .alpha.-olefin in the copolymer is 1.0% to 18% by weight.
The linear low-density ethylene copolymers usable in the present invention are those having a structure such that the number of the short-chain branch (i.e., side-chain alkyl groups having 1 to 10 carbon atoms) is 3 to 35, based on 1,000 carbon atoms of the backbone chain (i.e., main-chain).
(F) Inorganic Filler
The inorganic fillers usable as the component (F) in the present invention are those conventionally used in the fields of synthetic resins and rubber. They are inorganic compounds that do not react with oxygen and water. Preferably used are those fillers which are not decomposed during the process of kneading or molding. The inorganic fillers can be divided into groups: metals such as aluminum, copper, iron, lead, and nickel; compounds, such as oxides and their hydrated (hydroxides), sulfuric acid salts, carbonic acid salts, and silicic acid salts of the above metals and metals such a magnesium, calcium, barium, zinc, zirconium, molybdenum, silicon, antimony, and titanium; complex salts of the above metals; and mixtures thereof. Typical examples of these inorganic fillers are the above-described metals, aluminum oxide (alumina), their hydrates, calcium oxide, magnesium oxide (magnesia), magnesium hydroxide, zinc oxide, oxides of lead such as lead oxide red and lead oxide, magnesium carbonate, calcium carbonate, basic magnesium carbonate, white carbon, asbestos, mica, talc, glass fiber, glass powder, glass beads, clay, diatomaceous earth (kaolin clay), silica, wollastonite, iron oxide, antimony oxide, titanium oxide (titania), lithopone, pumice powder, aluminum sulfate (glypsum, for example), zirconium carbonate, zirconium oxide, barium carbonate, dolomite, molybdenum disulfide, and iron sand. In the case of powdered inorganic fillers, it is preferred that the diameter be 1 mm or less (with the range of from 0.5 mm or less being more preferred). In the case of fibrous inorganic fillers, it is preferred that the diameter be from 1 to 500 microns (with the range of from 1 to 300 microns being more preferred, and the length be from 0.1 to 6 mm (with the range of from 0.1 to 5 mm being more preferred). Further, in the case of plate-shaped inorganic fillers, it is preferred that the diameter be 2 mm or less (with the range of 1 mm or less being more preferred).
Of these inorganic filers, mica, talc, calcium carbonate, glass fiber, wollastonite are desirable in that they increase stiffness. Particularly preferred are talc, mica, and glass fiber. With regard to these inorganic fillers, details are described in "Encyclopedia", Vol. 6, pp. 740-763 and Vol. 6, pp. 610 to 690 (1976).
The formulation ratio of the modified propylene copolymer (A) in the composition of the present invention is 5.0 to 50% by weight, preferably 5.0 to 40% by weight, more preferably 7.0 to 40% by weight. When the amount of the modified propylene polymer (i.e., the component (A)) in the composition is less than 5% by weight, the resultant composition does not properly adhere to a polyurethane. On the other hand, even if formulated in an amount in excess of 50% by weight, a corresponding further improvement of the adhesion or of the weathering resistance cannot be obtained, but rather the resultant composition may have a poor mechanical strength.
The ethylene-propylene copolymer rubber (C) may be formulated into the present composition. The content of the component (C) in the compositions is generally 3% to 35% by weight, preferably 3% to 30% by weight, more preferably 5% to 30% by weight. When the content of the component (C) is less than 3% by weight, the impact resistance of the resultant polymer composition cannot be sufficiently improved. Contrary to this, when the content of the component (C) is more than 35% by weight, the stiffness of the resultant polymer composition is unpreferably decreased although the impact resistance is improved and the moldability or processability of the polymer composition tends to be impaired (e.g., flow marks and silver streaks are likely to be generated).
The high-density ethylene polymer (D) may be formulated into the present composition. The content of the component (D) in the composition, when used, is generally 3% to 25% by weight, preferably 3% to 20% by weight. When the content of the component (D) is less than 3% by weight, the disired improvements in the gloss and the impact resistance of the resultant polymer composition cannot be obtained. Contrary to this, when the content of the component (D) is more than 25% by weight, the thermal resistance of the polymer composition becomes poor and the inherent characteristics of the propylene polymer are impaired.
The linear low-density ethylene copolymer (E) may be formulated into the present composition. The content of the component (E) in the composition, when used, is generally 3% to 25% by weight, preferably 3% to 15% by weight. When the content of the component (E) is less than 3% by weight, the desired gloss cannot be obtained. Contrary to this, when the content of the component (E) is more than 25% by weight, the thermal resistance of the polymer composition becomes poor.
The inorganic filler (F) may be formulated into the present composition. The content of the component (F) in the composition, when used, is generally 2% to 40% by weight, preferably 3% to 30% by weight. When the content of the component (F) is less than 2% by weight, the stiffness of the polymer composition is not sufficiently improved. Contrary to this, when the content of the component (F) is more than 40% by weight, the generation of flow marks and silver streaks are likely to occur although the stiffness and dimension stability are improved.
When the components (A) and (B) are formurlated with one or more of the components (C), (D), (E), and (F), the content of the component (B) in the composition should be at least 15% by weight, preferably 15% to 85% by weight, more preferably 20% to 80% by weight and the weight ratio of the component (A) (2) to the total composition should be 0.01% to 10% by weight, preferably 0.02% to 10% by weight, more preferably 0.05% to 5% by weight to attain the objects of the present invention.
The present propylene composition may be prepared by any conventional method. For example, the above-mentioned component (A) and (B), and, if used, the other components (C), (D), (E), and/or (F) may be mixed homogeneously by applying the mixing method generally used in the field of olefin polymers so that the formulation ratio becomes within the range as specified above. In this case, all of the components formulated may be mixed at the same time, or alternatively, a part of the components may be mixed to prepare a so called masterbatch, followed by mixing of the masterbatch with the remainder of the components.
Furthermore, any conventional additives such as a stabilizer against heat, oxygen or UV-rays, metal degradation preventives, plasticizers, flame retardants, lubricants, fillers, colorants, antistatic agents and electrical characteristic improvers, which are generally formulated in olefin polymers, may be optionally formulated depending on the purpose of use of the composition, unless the physical properties of the composition are impaired thereby.
The composition thus obtained is generally molded into pellets and the desired molded products are prepared therefrom according to, for example, the injection molding or extrusion molding techniques, generally used in the fields of the respective thermoplastic resins.
When preparing the above composition, the temperature should be higher than the melting point of the polymers employed but should not cause thermal decomposition of the polymers, either in the case of melting and kneading or in the case of molding. The processing is generally practiced at 180.degree. to 300.degree. C., preferably 190.degree. to 250.degree. C.
Generally speaking, olefin polymers have a very poor adherence to polyurethanes, and therefore, when a molded product of an olefin polymer or its composition is used, a primer must be coated thereon and dried before the application of the polyurethane coating material. However, since the propylene polymer composition of the present invention has an excellent adhesion to polyurethanes, polyurethanes can be applied directly onto the surface of the molded product without coating the surface of the molded product with a primer (if a primer is used, adhesion can be further enhanced).
The propylene composition obtained by the present invention exhibits the following effects as compared with the propylene polymer composition of the prior art.
(1) The processability and moldability thereof is equal to or better than the prior art composition.
(2) The weathering resistance is good, as exhibited by the synergetic effect as mentioned above.
(3) It has an excellent adhesion to a polyurethane paint, and the subbing coating step of a primer can be omitted and the present composition coated directly on the surface of the polyurethane paint.
(4) By the application of an activation treatment generally practiced (e.g., corona discharge treatment, plasma treatment, UV-ray treatment) to the surface of a molded product, it is possible to attain a satisfactory adhesion to a polyurethane paint.
(5) The balanced properties of the stiffness and the impact resistance are improved.
(6) When the high-density ethylene polymer and/or the linear low-density ethylene copolymer is formulated into the composition, the gloss of the composition is remarkably improved.
The propylene polymer composition of the present invention, which can exhibit the effects mentioned above, can be utilized in a variety of fields. Typical uses may include outer decorative parts such as bumpers, bumper corners, etc., inner decorative parts such as door liners, etc., for automobiles, and parts for bikes such as fenders, etc.

EXAMPLE
The present invention will now be further, illustrated by, but is by no means limited to, the following Examples and Comparative Examples.
In the following Examples and Comparative Examples, the flexural modulus was measured according to ASTM D 790, the Izod impact strength according to ASTM D 256, and the coating adhesion strength by placing a flat test strip (thickness 2 mm, 130.times.130 mm) in 1,1,1-trichloroethane vapor for 30 seconds, thoroughly drying and then applying a high urethane coating material (produced by Nippon Chemical Co., trade name: R257, Solid) thereon to a dried thickness of 20 to 30 microns. After being left to stand for about 15 minutes, a urethane coating material (produced by Nippon Chemical Co., trade name: R266, Wacker Top) was applied to a dried thickness of 30 to 40 microns, followed by drying at 90.degree. C. for 30 minutes. Subsequently, the sample was left to stand in a thermostat chamber (temperature 23.degree. C., humidity 65%) for 48 hours. The resultant coated product (test strip) was cut to a 10 mm width, a part of the coating (about 10 mm) was forcibly peeled off, and thereafter, the remaining adhered portion was drawn in the direction opposite to the coating (at 180.degree.) at a speed of 50 mm/min. by means of a tensile testing machine, to measure the peel-off strength. Further, a weathering resistance test was conducted by cutting the above flat test strip to 50 mm.times.50 mm, which was irradiated by means of a Sunshine Weather-o-meter (produced by Suga Shikenki) under the conditions of a black panel temperature of 83.degree. C. and a rainfall condition of 12 min./80 min. Samples were taken out at respective irradiation times, and changes in appearance of the samples were observed and rated according to the following rankings.
.circleincircle. : no change
.circle.: chalking slightly generated
.DELTA.: cracks generated
x: cracks abundantly generated
Furthermore, the gloss was determined by using the above-mentioned flat test strip according to an ASTM D 523 method.
The components (A) to (F) and stabilizers against heat, oxygen or UV-rays used in the Examples and Comparative Examples are shown below.
(1) Modified Propylene Polymer
(i) For preparation of a modified propylene homopolymer, 85 parts by weight of a propylene homopolymer having an MFR (1) of 0.5 g/10 min. and 15 parts by weight of an ethylene-propylene copolymer rubber having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 20 together with 30 parts by weight of 2-hydroxyethyl methacrylate and 0.7 parts by weight of 2,2'-bis (tert-butylperoxyisopropyl) benzene were previously dry-blended by means of a Henschel mixer for 5 minutes. The resultant mixture was kneaded by use of a vent-type extruder (diameter 85 mm, cylinder temperature 160.degree.-200.degree. C.), and the resultant product was used as the "modified PP(A)".
(ii) A 100 parts by weight of a propylene homopolymer having an MFR (1) of 0.5 g/10 min was dry blended with 4.0 parts by weight of 2-hydroxyethyl acrylate and 0.4 parts by weight of 2,2'-bis (tert-butyl peroxyisopropyl) benzene for 5 minutes in a Henschel mixer. The resultant blend was kneaded in a vent-type extruder (diameter 40 mm, cylinder temperature 160.degree.-200.degree. C.) to obtain the pellets (hereinafter called the "modified PP (B)").
(iii) A propylene homopolymer having an MFR of 0.5 g/10 min and amorphous ethylene-propylene copolymer rubber having an ML.sub.1+4 of 20 at 100.degree. C. were mixed in a ratio shown below. A 100 parts by weight of the resultant mixture was dry blended with 4.0 parts by weight of 2-hydroxyethyl acrylate and 1.0 part by weight of 2,2'-bis (tert-butyl peroxyisopropyl) benzene for 5 minutes in a Henschel mixer. The resultent blend was kneaded in a vent-type extruder (diameter 40 mm, cylinder temperature 160.degree.-200.degree. C.) to obtain the pellets. The resultant modified propylene polymers were used as the modified P.P. (C), (D), and (E) as follows.
______________________________________Amount (wt %) Used Ethylene-propylenePropylene hompolymer copolymer rubber Abbreviation______________________________________95 5 Modified P.P. (C)70 30 Modified P.P. (D)40 60 Modified P.P. (E)______________________________________
(iv) As a comparative polymer, 100parts by weight of the above-mentioned propylene homopolymer was dry blended with 4.0 parts by weight of 2-hydroryethyl acrylate and 0.4 parts by weight of 2,2'-bis (tert-butyl peroxyisopropyl) benzene and the resultant blend was pelletized in the same manner as mentioned above. The resultant modified polymer was used as the "modified P.P. (F)".
(2) Propylene Polymer
The following propylene polymers were used.
(i) PP(A): An ethylene-propylene block copolymer having an ethylene content of 6.0% and an MFR(1) of 10 g/10 min.
(ii) PP(B): An ethylene-propylene block copolymer having an ethylene content of 8.8% and an MFR(1) of 15 g/10 min.
(iii) PP(C): An ethylene-propylene block copolymer having an ethylene content of 7.5% and an MFR(1) of 30 g/10 min.
(iv) PP(D): An ethylene-propylene block copolymer having an ethylene content of 10.1% and an MFR(1) of 28 g/10 min.
(v) PP(E): An ethylene-propylene block copolymer having an ethylene content of 10.1% and an MFR(1) of 1.5 g/10 min.
(vi) PP(F): An ethylene-propylene block copolymer having an ethylene content of 8.5% and an MFR (1) of 100 g/10 min.
(vii) PP(G): A propylene homopolymer having an MFR(1) of 10 g/10 min.
(viii) PP(H): An ethylene-propylene random copolymer having an ethylene content of 3.1% and an MFR(1) of 12 g/10 min.
(3) Ethylene-Propylene Random Copolymer Rubber
As the ethylene-propylene random copolymer rubber, an ethylene-propylene random copolymer having a propylene content of 27% by weight and an ML.sub.1+4 of 35 at 100.degree. C. (hereinafter called "EPR") was used.
(4) High-density Ethylene Polymer
As the high-density ethylene polymers, a high-density ethylene-butene-1 copolymer having a butene-1 content of 2% by weight, a density of 0.945, and an MFR(2) of 0.70 g/10 min (hereinafter called "HDPE(A)" and a high-density ethylene honopolymer having a density of 0.960 g/cm.sup.3 and an MFR(2) of 20 g/10 min (hereinafter called "HDPE(B)" were used.
(5) Linear Low-density Ethylene Copolymer
As the linear low-density ethylene copolymers, a linear low-density ethylene-butene-1 copolymer having a density of 0.918 g/cm.sup.3, an MFR(2) of 2.0 g/10 min, and seven side-chain alkyl (i.e., ethyl) groups per 1000 carbon atoms of the backbone carbon chain (hereinafter called "LLDPE(A)") and a linear low-density ethylene-butene-1 copolymer having a density of 0.921 g/cm.sup.3, an MFR(2) of 20 g/10 min, and six side-chain alkyl (i.e., ethyl) groups per 1000 carbon atoms of the backbone carbon chain (hereinafter called "LLDPE(B)") were used.
(6) Inorganic filler
As the inorganic filler, talc having a mean particle size of 2.0 microns, calcium carbonate (CaCO.sub.3) having a mean particle size of 2.0 .mu.m, and wollastonite having a mean particle size of 7.0 .mu.m were employed.
(7) Stabilizer
As various stabilizers, bis (2,2,6,6-tetramethyl-4-piperidine sebacate (hereinafter called "Stabilizer (A)"), 2-(3-tert-butyl-5-methyl-2-hydroxyphenyl-5-chlorobenzotriazole (hereinafter called "Stabilizer (B)) and tetra (methylene-3-(3,5-di-tertbutyl-4-hydroxyphenyl) propionate) methane (hereinafter called "Stabilizer (C)") were employed.
Examples 1 to 10 and Comparative Examples 1 to 3
The modified propylene homopolymer (i.e., Modified PP(A), together with the ethylene-propylene block copolymer, the propylene homopolymer and ethylene-propylene random polymer (as PP resin) were mixed in the respective amounts formulated as indicated in Table 1 by means of a super mixer for 5 minutes. Each mixture obtained was kneaded into pellets (composition) through a vented twin screw extruder (cylinder temperature 180.degree.-200.degree. C., diameter 30 mm). The respective pellets were molded into flat plates (thickness 2 mm, 130.times.130 mm) and test strips, for measurement of the flexural modulus and Izod impact strength, by use of a 5-ounce injection molding machine. For the respective test strips obtained, measurements were carried out with respect to the coating adhesion strength, Izod impact strength (temperature 23.degree. C.), weathering resistance test, and flexural modulus. The results are shown in Table 2.
From the results of the Examples and Comparative Examples, it can be clearly seen than the propylene polymer composition obtained according to the present invention not only has an excellent mechanical strength (flexural modulus, impact resistance) but also a good processability, and further, an excellent adhesion to polyurethanes. Further, the most salient effect is clearly the effect exhibited by an addition of stabilizers against heat, oxygen and UV-rays, which may be called a synergetic effect.
TABLE 1__________________________________________________________________________No. ofExample Propylene Amount ofor Com- polymer modified Amount of Amount of stabilizer (wt. parts)parative Amount PP(A) talc Stabilizer Stabilizer StabilizerExample Kind (wt. parts) (wt. parts) (wt. parts) (A) (B) (C)__________________________________________________________________________Example 1 A 90 10 0.3 0 0 0Example 2 " 90 10 0.3 0.05 0.05 0.10Example 3 " 90 10 0.3 0.15 0.15 0.50Example 4 " 80 20 0.3 0.15 0.15 0.10Example 5 " 70 30 0.3 0.15 0.15 0.10Example 6 " 50 50 0.3 0.15 0.15 0.10Example 7 E 50 50 0.3 0.15 0.15 0.10Example 8 F 50 50 0 0.15 0.15 0.10Example 9 G 50 50 0.3 0.15 0.15 0.10Example 10 H 50 50 0.3 0.15 0.15 0.10Comparative A 100 0 0 0 0 0Example 1Comparative " 100 0 0 0.05 0.05 0.10Example 2Comparative " 100 0 0 0.15 0.15 0.10Example 3__________________________________________________________________________
TABLE 2__________________________________________________________________________No. of Izod Coating testExample impact Weathering resistance, Coatingor Com- Flexural strength.sup.(1) appearance evaluation adhesion Squareparative MFR modulus 23.degree. C. irradiation time (hrs) strength test.sup.(2)Example (g/10 min.) (Kg/cm.sup.2) (notched) 200 400 500 700 1000 (g/cm width) (%)__________________________________________________________________________Example 1 17.4 12,700 5.9 .circle. x x -- -- 350 100Example 2 17.2 12,900 5.7 .circleincircle. x x -- -- 360 100Example 3 17.6 12,600 6.0 .circleincircle. .circleincircle. x x -- 350 100Example 4 20.3 11,900 7.2 .circleincircle. .circleincircle. .circleincircle. x x 420 100Example 5 22.7 11,200 7.8 .circleincircle. .circleincircle. .circleincircle. .circle. x 510 100Example 6 38.5 10,100 8.8 .circleincircle. .circleincircle. .circleincircle. .circle. x 720 100Example 7 28.1 8,700 5.7 .circleincircle. .circleincircle. .circleincircle. .circle. x 680 100Example 8 98.7 12,700 2.5 .circleincircle. .circleincircle. .circle. .DELTA. -- 780 100Example 9 30.5 11,800 4.7 .circleincircle. .circleincircle. .circle. .DELTA. -- 420 100Example 10 31.2 9,100 5.8 .circleincircle. .circleincircle. .circle. .DELTA. -- 510 100Comparative 15.0 12,800 5.1 x x -- -- -- 0 0Example 1Comparative 15.5 12,600 5.3 .circle. x x -- -- 0 0Example 2Comparative 15.2 13,000 5.2 .circleincircle. .circle. x x -- 0 0Example 3__________________________________________________________________________ .sup.(1) kg .multidot. cm/cm .sup.(2) Residual percentage
Examples 11 to 21 and Comparative Examples 4 to 6
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene homopolymer, the amorphous etylene-propylene copolymer, and the stabilizers were used in the amounts listed in Table 3.
The results are shown in Table 4.
TABLE 3__________________________________________________________________________ Amount of Amount of StabilizerNo. of Example Propylene polymer Modified (wt. parts)or Comparative Amount Amount P.P.(A) EPR Stabilizer Stabilizer StabilizerExample Kind (wt %) Kind (wt %) (wt %) (wt %) (A) (B) (C)__________________________________________________________________________Comparative B 90 -- -- -- 10 0 0 0Example 4Comparative " 90 -- -- -- 10 0.05 0.05 0.1Example 5Comparative " 90 -- -- -- 10 0.15 0.15 0.1Example 6Example 11 " 80 -- -- 10 10 0 0 0Example 12 " 80 -- -- 10 10 0.05 0.05 0.1Example 13 " 80 -- -- 10 10 0.15 0.15 0.1Example 14 " 70 -- -- 20 20 " " "Example 15 " 70 -- -- 30 10 " " "Example 16 " 25 C 25 20 30 " " "Example 17 " 40 -- -- 50 10 " " "Example 18 E 40 -- -- 50 10 " " "Example 19 F 40 -- -- 50 10 " " "Example 20 G 40 -- -- 50 10 " " "Example 21 H 40 -- -- 50 10 " " "__________________________________________________________________________
TABLE 4__________________________________________________________________________ Izod Coating Test Impact Weathering Resistance CoatingNo. of Example Flexural Strength.sup.(1) and Visual Appearance Adhesionor Comparative MFR Modulus -20.degree. C. (Irradiation hours) StrengthExample g/10 min (kg/cm.sup.2) notched 250 500 750 1000 1500 (g/cm width)__________________________________________________________________________Comparative 12.5 11500 7.5 .DELTA. x x -- -- 0Example 4Comparative 12.5 11500 7.5 .circleincircle. .circleincircle. x x -- 0Example 5Comparative 12.7 11400 7.8 .circleincircle. .circleincircle. .circleincircle. .DELTA. -- 0Example 6Example 11 18.3 10400 7.5 .circleincircle. x x -- -- 870Example 12 18.3 10400 7.7 .circleincircle. .circleincircle. .circleincircle. .circle. x 870Example 13 18.5 10200 7.7 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 870Example 14 21.0 9800 8.0 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. 1050Example 15 24.7 9400 7.8 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. 1350Example 16 12.7 6300 50 or more .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. 1500Example 17 45.1 7800 8.5 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. 1400Example 18 20.1 7100 5.2 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1400Example 19 80.1 9000 4.1 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1500Example 20 26.3 12100 2.3 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1150Example 21 30.0 8900 2.8 .circleincircle. .circleincircle. .circle. .circleincircle. .circle. 1100__________________________________________________________________________ .sup.(1) kg .multidot. cm/cm
Examples 22 to 34 and Comparative Examples 7 to 9
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene homopolymer, the amorphous ethylene-propylene copolymers, and talc were used in the amounts listed in Table 5.
The results are shown in Table 6.
TABLE 5__________________________________________________________________________ Amount of High-density Amount of StabilizerNo. of Example Propylene polymer Modified EPR Ethylene Polymer (wt. parts)or Comparative Amount P.P.(A) Amount Amount Talc Stabilizer Stabilizer StabilizerExample Kind (wt. parts) (wt. parts) (wt. part) Kind (wt. part) (wt %) (A) (B) (C)__________________________________________________________________________Example 22 A 70 10 10 A 10 0.3 -- -- --Example 23 " 70 10 10 " 10 0.3 0.05 0.05 0.10Example 24 " 70 10 10 " 10 0.3 0.15 0.15 0.15Example 25 " 60 20 10 " 10 0.3 -- -- --Example 26 " 50 30 10 " 10 0.3 -- -- --Example 27 " 30 50 10 " 10 0.3 -- -- --Example 28 " 40 20 30 " 10 0.3 -- -- --Example 29 " 60 20 10 B 10 0.3 -- -- --Example 30 " 60 20 10 A 10 0.3 -- -- --Example 31 E 30 50 10 " 10 0.3 -- -- --Example 32 F 30 50 10 " 10 0.3 -- -- --Example 33 G 30 50 10 " 10 0.3 -- -- --Example 34 H 30 50 10 " 10 0.3 -- -- --Comparative A 80 0 10 " 10 0.3 -- -- --Example 7Comparative " 80 0 10 " 10 0.3 0.05 0.05 0.10Example 8Comparative " 80 0 10 " 10 0.3 0.15 0.15 0.15Example 9__________________________________________________________________________
TABLE 6__________________________________________________________________________ Izod Impact Weathering Resistance and Visual CoatingNo. of Example Flexural Strength.sup.(1) Glossi- Appearance Evaluation Adhesionor Comparative MFR Modulus -20.degree. C. ness (Irradiation hours) StrengthExample g/10 min (kg/cm.sup.2) (notched) (60%) 250 500 750 1000 1250 1500 (g/cm width)__________________________________________________________________________Example 22 10.2 10,500 9.8 83 .DELTA. x -- -- -- -- 900Example 23 10.2 10,500 9.8 83 .circleincircle. .circleincircle. x -- -- -- 900Example 24 10.2 10,500 9.8 83 .circleincircle. .circleincircle. .circleincircle. .circle. x -- 900Example 25 12.5 10,100 10.3 81 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 1170Example 26 13.7 9,800 10.8 81 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1450Example 27 19.3 8,200 8.1 72 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 1500 or moreExample 28 10.7 6,600 50 or more 84 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1500 or moreExample 29 18.7 10,300 8.7 87 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. .DELTA. 1150Example 30 16.0 10,200 9.2 87 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1150Example 31 83.3 10,200 6.3 80 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1100 or moreExample 32 16.5 7,000 7.0 70 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1200Example 33 23.5 9,500 2.8 85 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1200Example 34 21.6 6,500 4.2 83 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. .DELTA. 1250Comparative 8.7 11,700 9.0 85 x -- -- -- -- -- 0Example 7Comparative 8.7 11,700 9.0 85 .circleincircle. .circle. x -- -- -- 0Example 8Comparative 8.7 11,700 9.2 85 .circleincircle. .circleincircle. .circleincircle. .DELTA. x -- 0Example 9__________________________________________________________________________ .sup.(1) kg .multidot. cm/cm
Examples 35 to 43 and Comoarative Examples 10 to 16
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polyemers, the modified propylene polymer, the amorphous ethylene-propylene copolymer, and the inorganic fillers were used in the amounts listed in Table 7.
The results are shown in Table 8.
TABLE 7__________________________________________________________________________ Propylene Polymer Propylene PolymerNo. of Example Modified (I) (II) Inorganic Filleror Comparative P.P.(A) Amount Amount EPR AmountExample (wt. parts) Kind (wt. part) Kind (wt. part) (wt. part) Kind (wt. part)__________________________________________________________________________Example 35 50 A 12 -- 0 28 Talc 10Example 36 30 " 32 -- 0 28 Talc 10Example 37 20 " 42 -- 0 28 Talc 10Example 38 10 B 50 -- 0 30 Talc 10Example 39 20 C 30 B 10 30 Talc 10Example 40 40 B 10 -- 0 30 CaCO.sub.3 20Example 41 40 " 15 -- 0 30 CaCO.sub.3 .sup. 10.sup.(1)Example 42 40 " 10 -- 0 30 Silica 20Example 43 40 " 15 -- 0 30 Silica 5.sup.(2)Comparative 50 " 10 -- 0 30 Talc 10Example 10Comparative 0 " 60 -- 0 30 Talc 10Example 11Comparative 60 -- 0 -- 0 30 Talc 10Example 12Comparative 50 B 40 -- 0 0 Talc 10Example 13Comparative 50 " 20 -- 0 30 -- 0Example 14Comparative 50 C 10 -- 0 30 Talc 10Example 15Comparative 5 B 55 -- 0 30 Talc 10Example 16__________________________________________________________________________ .sup.(1) 5 parts by weight of talc was additionally incorporated .sup.(2) 10 parts by weight of talc was additionally incorporated.
TABLE 8______________________________________ IzodNo. of Impact CoatingExample or Flexural Strength.sup.(1) AdhesionComparative MFR Modulus (-30.degree. C.) StrengthExample (g/10 min) (kg/cm.sup.2) (notched) (g/cm)______________________________________Example 35 13.2 7,100 11.8 2,000 or moreExample 36 9.1 8,400 9.6 1,600Example 37 6.8 8,700 8.1 1,470Example 38 7.0 9,700 11.1 1,150Example 39 9.5 10,100 9.4 1,370Example 40 10.5 9,100 9.6 1,320Example 41 10.8 9,000 10.3 1,530Example 42 7.1 8,200 8.0 1,500Example 43 8.5 8,500 10.2 1,650Comparative 14.3 8,100 11.2 2,000 or moreExample 10Comparative 8.6 11,800 13.7 0Example 11Comparative 16.7 7,300 10.1 2,000 or moreExample 12Comparative 28.3 13,500 3.7 730Example 13Comparative 16.0 6,400 35.0 2,000 or moreExample 14Comparative 13.5 9,500 7.5 2,000 or moreExample 15Comparative 9.0 10,600 12.5 800Example 16______________________________________ .sup.(1) kg .multidot. cm/cm
Examples 44 to 51
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, the amorphous ethylene-propylene copolymer, and the inorganic filler in the amounts listed in Table 9 were used.
The results are shown in Table 10.
TABLE 9__________________________________________________________________________ Modified Propyl- Propylene Polymer Propylene PolymerNo. of Example ene Polymer (I) (II) Amount of Inorganic Filleror Comparative Amount Amount Amount EPR AmountExample Kind (wt. %) Kind (wt. %) Kind (wt. %) (wt. %) Kind (wt. %)__________________________________________________________________________Example 44 Modified 10 D 16 A 33 31 Talc 10 PP(B)Example 45 Modified 20 " 13 " 25 32 Talc 10 PP(B)Example 46 Modified 30 " 11 " 16 33 Talc 10 PP(B)Example 47 Modified 20 C 10 " 29 34 Talc 7 PP(B)Example 48 Modified 30 " 12 B 10 33 CaCO.sub.3 15 PP(B)Example 49 Modified " " 12 " 10 33 CaCO.sub.3 .sup. 10.sup.(1) PP(B)Example 50 Modified " " 20 -- 0 35 Wallas- 15 PP(B) toniteExample 51 Modified " " 20 -- 0 35 Wallas- .sup. 10.sup.(1) PP(B) tonite__________________________________________________________________________ .sup.(1) 5% by weight of talc was further added.
TABLE 10__________________________________________________________________________ Izod Impact CoatingNo. of Example Flexural Strength.sup.(1) Adhesionor Comparative MFR Modulus -30.degree. C. Gloss StrengthExample (g/10 min) (kg/cm.sup.2) notched (GS, %) (g/cm width)__________________________________________________________________________Example 44 10.3 10,100 9.0 74 800Example 45 10.7 10,200 8.6 76 870Example 46 11.5 10,100 8.1 77 980Example 47 10.0 10,100 8.4 79 980Example 48 12.0 9,100 8.8 84 850Example 49 11.3 9,400 8.5 80 850Example 50 9.0 10,800 7.2 68 820Example 51 9.7 10,100 8.0 71 820__________________________________________________________________________ .sup.(1) kg .multidot. cm/cm
Examples 52 to 59 and Comparative Example 19
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, the amorphous ethylene-propylene copolymer, and the inorganic filler in the amounts listed in Table 11 were used.
The results are shown in Table 12.
TABLE 11__________________________________________________________________________ Propylene Polymer Propylene PolymerNo. of Example Modified P.P.(B) (I) (II) Amount of Inorganic Filleror Comparative Amount Amount Amount EPR AmountExample Kind (wt. %) Kind (wt. %) Kind (wt. %) (wt. %) Kind (wt. %)__________________________________________________________________________Example 52 C 20 C 10 B 27 34 Talc 9Example 53 A 20 " 10 " 31 30 Talc 9Example 54 D 20 " 15 " 29 27 Talc 9Example 55 A 10 D 20 A 31 30 Talc 9Example 56 " 30 " 10 " 21 30 Talc 9Example 57 " 30 C 10 B 7 33 Wollas- 20 toniteExample 58 C 30 D 10 A 7 33 Wollas- 15 tonite Talc 5Example 59 D 20 C 10 B 25 30 CaCO.sub.3 15Comparative E 20 C 15 B 21 20 Talc 9Example 19__________________________________________________________________________
TABLE 12__________________________________________________________________________ Izod Impact CoatingNo. of Example Flexural Strength.sup.(1) Adhesionor Comparative MFR Modulus -30.degree. C. Glossiness Flow Mark StrengthExample (g/10 min) (kg/cm.sup.2) notched (gloss, %) Evaluation.sup.(2) (g/cm width)__________________________________________________________________________Example 54 13.8 9,500 8.5 78 .circle. 1,050Example 55 12.5 10,200 9.1 70 .circle. 1,300Example 56 10.7 10,500 8.7 61 .circle. 1,350Example 57 10.5 10,200 10.2 72 .circle. 1,020Example 58 11.7 10,000 9.5 66 .circle. 1,350Example 59 10.7 8,500 8.0 63 .circle. 1,000Example 60 11.5 9,200 8.2 68 .circle. 1,000Example 61 10.2 8,800 10.7 70 .circle. 1,220Comparative 9.1 10,300 9.5 48 .DELTA. 980Example 19__________________________________________________________________________ .sup.(1) kg .multidot. cm/cm .sup.(2) Flow mark evaluation: .circle. . . . No flow mark, .DELTA. . . . Small flow mark, x . . . Large flow mark
Examples 60 to 72 and Comparative Examples 20 to 23
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, and the inorganic filler in the amounts listed in Table 13 were used.
The results are shown in Table 14.
TABLE 13__________________________________________________________________________ Propylene Amount of Amount of StabilizerNo. of Example Polymer Modified Amount of (wt. part)or Comparative Amount P.P. (A) Talc Stabilizer Stabilizer StabilizerExample Kind (wt. %) (wt. %) (wt. %) (A) (B) (C)__________________________________________________________________________Example 60 B 80 10 10 0 0 0Example 61 " 80 10 10 0.05 0.05 0.1Example 62 " 80 10 10 0.15 0.15 0.1Example 63 " 60 10 30 0.15 0.15 0.1Example 64 " 70 20 10 0.15 0.15 0.1Example 65 " 60 30 10 0.15 0.15 0.1Example 66 " 40 50 10 0.15 0.15 0.1Example 67 E 40 50 10 0.15 0.15 0.1Example 68 F 40 50 10 0.15 0.15 0.1Example 69 G 40 50 10 0.15 0.15 0.1Example 70 H 40 50 10 0.15 0.15 0.1Example 71 B 70 20 .sup. 0.15sup.(1) 0.15 0.1Example 72 " 70 20 .sup. 0.15sup.(2) 0.15 0.1Comparative " 90 0 10 0 0 0Example 20Comparative " 90 0 10 0.05 0.05 0.1Example 21Comparative " 90 0 10 0.15 0.15 0.1Example 22Comparative " 70 0 30 0.15 0.15 0.1Example 23__________________________________________________________________________ .sup.(1) CaCO.sub.3 .sup.(2) Wollastonite
TABLE 14__________________________________________________________________________ Izod Impact Weathering Resistance and Coating TestNo. of Example Flexural Strength Visual Appearance Evalua- Coating Adhesionor Comparative MFR Modulus 23.degree. C. tion (Irradiation hours) StrengthExample g/10 min (kg/cm.sup.2) notched 200 300 500 750 1000 (g/cm width)__________________________________________________________________________Example 60 16.7 14,300 5.7 .circle. x x -- -- 330Example 61 16.7 14,400 5.7 .circleincircle. .circleincircle. x x -- 330Example 62 16.4 14,300 5.8 .circleincircle. .circleincircle. .circleincircle. x -- 330Example 63 14.8 26,500 4.0 .circleincircle. .circleincircle. .circle. x x 300Example 64 20.2 14,000 6.4 .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 400Example 65 25.2 13,500 7.0 .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 490Example 66 34.1 12,300 7.8 .circleincircle. .circleincircle. .circleincircle. x x 680Example 67 25.1 11,000 5.2 .circleincircle. .circleincircle. .circleincircle. x x 600Example 68 95.7 14,700 2.8 .circleincircle. .circleincircle. .circle. x x 710Example 69 27.6 13,600 3.5 .circleincircle. .circleincircle. .circle. x x 380Example 70 30.5 10,000 4.1 .circleincircle. .circleincircle. .circleincircle. x x 480Example 71 22.4 12,800 7.2 .circleincircle. .circleincircle. .circleincircle. .circle. x 350Example 72 13.6 11,000 2.7 .circleincircle. .circleincircle. x x x 320Comparative 13.4 15,200 5.1 x x -- -- -- 0Example 20Comparative 13.5 15,200 5.0 .circle. x x -- -- 0Example 21Comparative 13.5 15,300 5.1 .circleincircle. .circle. x x -- 0Example 22Comparative 12.1 27,600 3.1 .circleincircle. .DELTA. x x -- 0Example 23__________________________________________________________________________
Examples 73 to 85 and Comparative Examples 24 to 26
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, the amorphous ethylene-propylene copolymer, and the inorganic filler in the amounts listed in Table 15 were used.
The results are shown in Table 16.
TABLE 15__________________________________________________________________________ Amount of Amount of Amorphous Propylene Modified Ethylene- Amount of StabilizerNo. of Example Polymer Propylene Propylene (wt. part)or Comparative Amount Polymer Copolymer Talc Stabilizer Stabilizer StabilizerExample Kind (wt. %) (wt. part) (wt. part) (wt. part) (A) (B) (C)__________________________________________________________________________Example 73 B 70 10 10 10 0 0 0Example 74 " 70 10 10 10 0.05 0.05 0.10Example 75 " 70 10 10 10 0.15 0.15 0.10Example 76 " 60 20 10 10 " " 0.10Example 77 " 50 30 10 10 " " 0.10Example 78 " 30 50 10 10 " " 0.10Example 79 " 30 50 10 10 " " 0.10Example 80 E 30 50 10 10 " " 0.10Example 81 F 30 50 10 10 " " 0.10Example 82 G 30 50 10 10 " " 0.10Example 83 H 75 10 5 10 " " 0.10Example 84 B 70 10 10 .sup. 10.sup.(1) " " 0.10Example 85 " 70 10 10 .sup. 10.sup.(2) " " 0.10Comparative B 80 0 10 10 0 0 0Example 24Comparative " 80 0 10 10 0.05 0.05 0.10Example 25Comparative " 80 0 10 10 0.15 0.15 0.10Example 26__________________________________________________________________________ .sup.(1) CaCO.sub.3 .sup.(2) Wollastonite
TABLE 16__________________________________________________________________________ Izod Impact Weathering Resistance and CoatingNo. of Example Flexural Strength.sup.(1) Visual Appearance Evalua- Adhesionor Comparative MFR Modulus -20.degree. C. tion (Irradiation hours) StrengthExample g/10 min (kg/cm.sup.2) (notched) 250 500 750 1250 1500 (g/cm .multidot. width)__________________________________________________________________________Example 73 18.0 12,400 6.8 .DELTA. x x -- -- 820Example 74 18.0 12,400 6.8 .circleincircle. .circleincircle. .circleincircle. .DELTA. x 820Example 75 18.1 12,400 6.8 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 820Example 76 20.2 12,000 7.6 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. 1050Example 77 23.8 11,500 8.3 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. 1300Example 78 29.3 10,100 8.6 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. 1420Example 79 21.5 9,200 5.7 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1380Example 80 82.7 11,100 4.1 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1420Example 81 21.7 12,000 4.9 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 1050Example 82 25.8 9,400 2.0 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 1100Example 83 20.4 13,300 2.2 .circleincircle. .circleincircle. .circleincircle. .DELTA. x 780Example 84 18.2 10,800 7.4 .circleincircle. .circleincircle. .circleincircle. .circle. .circle. 840Example 85 14.1 9,800 4.2 .circleincircle. .circleincircle. .circle. x x 710Comparative 12.3 12,900 6.2 x x -- -- -- 0Example 24Comparative 12.3 13,000 6.2 .circleincircle. .circle. x x -- 0Example 25Comparative 12.1 12,900 6.4 .circleincircle. .circleincircle. .DELTA. x x 0Example 26__________________________________________________________________________ .sup.(1) kg .multidot. cm/cm
Examples 86 to 101 and Comparative Examples 27 to 29
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, the ethylene-propylene copolymer rubber, the high-density ethylene polymer, and the inorganic filler in the amounts listed in Table 17 were used.
The results are shown in Table 18.
TABLE 17__________________________________________________________________________No. of Example Propylene Polymer Modified HDPEor Comparative Amount P.P.(A) Amount Amount Talc Weathering StabilizerExample Kind (wt %) (wt %) (wt %) Kind (wt %) (wt %) (A) (B) (C)__________________________________________________________________________Comparative A 70 -- 10 A 10 10 -- -- --Example 27Comparative " 70 -- 10 " 10 10 0.05 0.05 0.1Example 28Comparative " 70 -- 10 " 10 10 0.15 0.15 0.1Example 29Example 86 " 60 10 10 " 10 10 -- -- --Example 87 " 60 10 10 " 10 10 0.05 0.05 0.1Example 88 " 60 10 10 " 10 10 0.15 0.15 0.1Example 89 " 50 20 10 " 10 10 0.15 0.15 0.1Example 90 " 40 30 10 " 10 10 0.15 0.15 0.1Example 91 " 10 20 30 " 10 10 0.15 0.15 0.1 " 20Example 92 " 40 20 10 " 10 10 0.15 0.15 0.1Example 93 " 30 20 10 " 10 10 0.15 0.15 0.1Example 94 " 50 20 10 B 10 10 0.15 0.15 0.1Example 95 E 20 50 10 A 10 10 0.15 0.15 0.1Example 96 F 20 50 10 " 10 10 0.15 0.15 0.1Example 97 G 20 50 10 " 10 10 0.15 0.15 0.1Example 98 H 20 50 10 " 10 10 0.15 0.15 0.1Example 99 A 30 20 10 " 10 *1 30 0.15 0.15 0.1Example 100 " 30 20 10 " 10 Talc 0.15 0.15 0.1 10 *1 20Example 101 " 40 20 10 HDPE(A) 10 *2 20 0.15 0.15 0.1__________________________________________________________________________ *1 CaCO.sub.3 *2 wollastonite
TABLE 18__________________________________________________________________________ Izod Coating Test Impact Weathering Resistance and CoatingNo. of Example Flexural Strength.sup.(1) Visual Appearance Evaluation Adhesionor Comparative MFR Modulus -20.degree. C. Gloss (Irradiation hours) StrengthExample g/10 min (kg/cm.sup.2) notched (GS60.degree.) 250 500 750 1000 1250 1500 (g/min)__________________________________________________________________________Comparative 7.2 16200 9.2 75 x x -- -- -- -- 0Example 27Comparative 7.4 16400 9.5 75 .circleincircle. .circle. x x -- -- 0Example 28Comparative 7.2 16200 9.2 75 .circleincircle. .circleincircle. .circleincircle. x x x 0Example 29Example 86 7.7 15700 10.1 72 x x x -- -- -- 600Example 87 7.7 15700 10.1 72 .circleincircle. .circleincircle. x x -- -- 600Example 88 7.7 15700 10.1 72 .circleincircle. .circleincircle. .circleincircle. .circle. x x 600Example 89 11.4 15200 10.5 70 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 850Example 90 14.6 14900 10.8 68 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1200Example 91 13.0 9200 50 or more 65 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1420Example 92 10.7 20000 8.7 55 .circleincircle. .circleincircle. .circleincircle. .circle. x x 620Example 93 9.2 27100 8.4 48 .circleincircle. .circleincircle. .circleincircle. .circle. x x 500Example 94 16.3 15500 8.7 80 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 870Example 95 76.8 13100 6.0 75 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1420Example 96 16.4 10600 6.8 62 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1050Example 97 23.1 12600 2.5 76 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1020Example 98 21.9 9000 3.9 74 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1100Example 99 5.8 22500 4.3 75 .circleincircle. .circleincircle. .circleincircle. .circle. x x 470Example 100 7.3 24000 4.5 68 .circleincircle. .circleincircle. .circleincircle. .circle. x x 520Example 101 10.8 14200 9.2 35 .circleincircle. .circleincircle. .circleincircle. .circleincircle. x x 800__________________________________________________________________________ .sup.(1) kg .multidot. cm/cm
Examples 102 to 114 and Comparative Examples 30 to 32
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, the high-density ethylene polymer, and the inorganic filler in the amounts listed in Table 19 were used.
The results are shown in Table 20.
TABLE 19__________________________________________________________________________ Propylene WeatheringNo. of Example Polymer Modified HDPE Resistantor Comparative Amount P.P. (A) Amount Talc StabilizerExample Kind (wt %) (wt %) Kind (wt %) (wt %) (A) (B) (C)__________________________________________________________________________Comparative A 90 -- A 10 0.3 -- -- --Example 30Comparative " 90 -- " 10 0.3 0.05 0.05 0.10Example 31Comparative " 90 -- " 10 0.3 0.15 0.15 0.15Example 32Example 102 " 80 10 " 10 0.3 -- -- --Example 103 " 80 10 " 10 0.3 0.05 0.05 0.10Example 104 " 80 10 " 10 0.3 0.15 0.15 0.15Example 105 " 70 20 " 10 0.3 0.15 0.15 0.15Example 106 " 60 30 " 10 0.3 0.15 0.15 0.15Example 107 " 40 50 " 10 0.3 0.15 0.15 0.15Example 108 " 75 20 " 5 0.3 0.15 0.15 0.15Example 109 " 65 20 " 15 0.3 0.15 0.15 0.15Example 110 " 70 20 B 10 0.3 0.15 0.15 0.15Example 111 E 40 50 " 10 0.3 0.15 0.15 0.15Example 112 F 40 50 " 10 0.3 0.15 0.15 0.15Example 113 G 40 50 " 10 0.3 0.15 0.15 0.15Example 114 H 40 50 " 10 0.3 0.15 0.15 0.15__________________________________________________________________________
TABLE 20__________________________________________________________________________ Izod Coating Test Impact Weathering Resistance and Visual CoatingNo. of Example Flexural Strength.sup.(1) Appearance 83.degree. C., Weather-O- Adhesionor Comparative MFR Modulus 23.degree. C., Meter, Irradiation hours Strength GlossExample (g/10 min) (kg/cm.sup.2) notched 250 500 750 1000 1250 1500 (g/cm width) (GS 60.degree.)__________________________________________________________________________Comparative 10.0 13000 9.0 x x -- -- -- -- 0 75Example 30Comparative 10.0 12900 9.2 .circle. x x x -- -- 0 75Example 31Comparative 10.0 13000 9.0 .circle. .circle. .circle. x x x 0 75Example 32Example 102 15.8 12000 9.5 x x x -- -- -- 370 71Example 103 15.8 12000 9.5 .circle. .circle. x x -- -- 370 71Example 104 16.0 12000 9.7 .circle. .circle. .circle. .DELTA. x x 370 71Example 105 17.5 11800 10.4 .circle. .circle. .circle. .circle. x x 450 70Example 106 20.6 11600 11.2 .circle. .circle. .circle. .circle. .circle. x 550 70Example 107 30.2 10100 7.6 .circle. .circle. .circle. .circle. .DELTA. x 800 68Example 108 18.7 12300 9.0 .circle. .circle. .circle. .circle. x x 420 68Example 109 15.1 11600 15.7 .circle. .circle. .circle. .circle. .DELTA. x 460 71Example 110 21.2 12100 8.2 .circle. .circle. .circle. .circle. x x 380 78Example 111 96.7 11200 3.6 .circle. .circle. .circle. .circle. x x 820 74Example 112 21.7 8000 6.2 .circle. .circle. .circle. .circle. .DELTA. x 800 65Example 113 29.7 10200 2.0 .circle. .circle. .circle. .circle. x x 450 72Example 114 28.7 8000 3.2 .circle. .circle. .circle. .circle. .DELTA. x 530 72__________________________________________________________________________
Examples 115 to 127 and Comparative Examples 33 to 35
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, the ethylene-propylene copolymer rubber, the linear low-density ethylene copolymer, and the inorganic filler in the amounts listed in Table 21 were used.
The results are shown in Table 22.
TABLE 21__________________________________________________________________________ Linear low-density Propylene Amount of ethylene Amount of StabilizerNo. of Example Polymer Modified Amount of copolymer (wt. parts)or Comparative Amount P.P. (A) EPR Amount Talc Stabilizer Stabilizer StabilizerExample Kind (wt. %) (wt. %) (wt. %) Kind (wt. %) (wt. %) (A) (B) (C)__________________________________________________________________________Comparative A 70 -- 10 A 10 10 0 0 0Example 33Comparative " 70 -- 10 A 10 10 0.05 0.05 0.1Example 34Comparative " 70 -- 10 A 10 10 0.15 0.15 0.1Example 35Example 115 " 60 10 10 A 10 10 0 0 0Example 116 " 60 10 10 A 10 10 0.05 0.05 0.1Example 117 " 60 10 10 A 10 10 0.15 0.15 0.1Example 118 " 40 30 10 A 10 10 0.15 0.15 0.1Example 119 B 20 15 25 A 10 7 0.15 0.15 0.1 C 23Example 120 A 65 10 10 A 5 10 0.15 0.15 0.1Example 121 " 20 50 10 A 10 10 0.15 0.15 0.1Example 122 E 20 50 10 A 10 10 0.15 0.15 0.1Example 123 F 20 50 10 A 10 10 0.15 0.15 0.1Example 124 G 20 50 10 A 10 10 0.15 0.15 0.1Example 125 H 20 50 10 A 10 10 0.15 0.15 0.1Example 126 A 55 10 10 A 10 15*.sup.1 0.15 0.15 0.1Example 127 " 55 10 10 A 10 15*.sup.2 0.15 0.15 0.1__________________________________________________________________________ *.sup.1 CaCO.sub.3 *.sup.2 wollastonite
TABLE 22__________________________________________________________________________ Izod Coating Test Impact Weathering Resistance and CoatingNo. of Example Flexural Strength.sup.(1) Gloss Visual Appearance Evaluation Adhesionor Comparative MFR Modulus -20.degree. C., GS (Irradiation hours) StrengthExample (g/10 min) (kg/cm.sup.2) notched (60%) 250 500 750 1000 1250 1500 (g/cm .multidot. width)__________________________________________________________________________Comparative 6.2 13200 6.5 81 x x -- -- -- -- --Example 33Comparative 6.3 13200 6.5 81 .circleincircle. .circleincircle. x x x -- --Example 34Comparative 6.2 13200 6.5 81 .circleincircle. .circleincircle. .circleincircle. .circle. x -- --Example 35Example 115 11.8 12900 7.0 79 .DELTA. x x -- -- -- 750Example 116 11.8 12900 6.9 79 .circleincircle. .circleincircle. .circleincircle. .circleincircle. x -- 750Example 117 11.7 12800 7.0 79 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. 750Example 118 14.3 12200 7.6 76 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. 1100Example 119 12.7 12200 50 or more 70 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. 1280Example 120 10.1 13300 6.6 71 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 700Example 121 18.3 9800 5.4 63 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1250Example 122 72.4 10900 4.0 80 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1300Example 123 10.0 8100 5.4 68 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 1300Example 124 15.3 12600 2.8 81 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 1000Example 125 14.6 7800 3.2 79 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1050Example 126 11.8 15600 7.4 80 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 780Example 127 6.3 10900 3.7 62 .circleincircle. .circleincircle. .circleincircle. x x x 530__________________________________________________________________________
Examples 128 to 139 and Comparative Examples 36 to 38
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, and the linear low-density ethylene copolymer in the amounts listed in Table 23 were used.
The results are shown in Table 24.
TABLE 23__________________________________________________________________________ Linear low-density Propylene Amount of ethylene Amount of StabilityNo. of Example Polymer Modified copolymer (wt. parts)or Comparative Amount P.P.(A) Amount Stabilizer Stabilizer StabilizerExample Kind (wt. %) (wt. %) Kind (wt. %) (A) (B) (C)__________________________________________________________________________Comparative A 90 -- A 10 0 0 0Example 36Comparative " 90 -- " 10 0.05 0.05 0.1Example 37Comparative " 90 -- " 10 0.15 0.15 0.1Example 38Example 128 " 80 10 " 10 0 0 0Example 129 " 80 10 " 10 0.05 0.05 0.1Example 130 " 80 10 " 10 0.15 0.15 0.1Example 131 " 70 20 " 10 0.15 0.15 0.1Example 132 " 60 30 " 10 0.15 0.15 0.1Example 133 " 85 10 " 5 0.15 0.15 0.1Example 134 " 80 10 B 10 0.15 0.15 0.1Example 135 " 30 50 A 10 0.15 0.15 0.1Example 136 E 30 50 " 10 0.15 0.15 0.1Example 137 F 30 50 " 10 0.15 0.15 0.1Example 138 G 30 50 " 10 0.15 0.15 0.1Example 139 H 30 50 " 10 0.15 0.15 0.1__________________________________________________________________________
TABLE 24__________________________________________________________________________ Izod Coating Test Impact CoatingNo. of Example Flexural Strength.sup.(1) Gloss Weathering Resistance and Adhesionor Comparative MFR Modulus 23.degree. C., GS Visual Appearance Evaluation StrengthExample (g/10 min) (kg/cm.sup.2) notched (60%) 250 500 750 1000 1250 1500 (g/cm .multidot. width)__________________________________________________________________________Comparative 11.7 13200 9.8 73 x x -- -- -- -- --Example 36Comparative 11.7 13200 9.8 73 .circleincircle. .circleincircle. x x -- -- --Example 37Comparative 11.7 13200 9.8 73 .circleincircle. .circleincircle. .circleincircle. .DELTA. x x --Example 38Example 128 12.8 12800 11.7 70 .DELTA. x x -- -- -- 380Example 129 12.8 12800 11.7 71 .circleincircle. .circleincircle. .circleincircle. .DELTA. x x 380Example 130 12.8 12800 11.7 71 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 380Example 131 14.3 12300 12.8 68 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 460Example 132 16.8 11900 13.3 67 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 550Example 133 11.4 12200 10.3 62 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 420Example 134 14.5 13000 10.3 75 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 360Example 135 25.6 9500 8.0 61 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 770Example 136 85.0 11400 4.9 71 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 700Example 137 15.8 8000 5.8 57 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 300Example 138 23.8 17300 3.0 73 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. x 400Example 139 20.0 7800 4.4 70 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 480__________________________________________________________________________
Examples 140 to 153 and Comparative Examples 39 to 41
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, the linear low-density ethylene copolymer, and the inorganic filler in the amounts listed in Table 25 were used.
The results are shown in Table 26.
TABLE 25__________________________________________________________________________ Linear low-density Propylene Amount of ethylene Amount of StabilityNo. of Example Polymer Modified copolymer (wt. parts)or Comparative Amount P.P.(A) Amount Talc Stabilizer Stabilizer StabilizerExample Kind (wt. %) (wt. %) Kind (wt. %) (wt. %) (A) (B) (C)__________________________________________________________________________Comparative A 80 -- A 10 0 0 0 0Example 39Comparative " 80 -- A 10 10 0.05 0.05 0.1Example 40Comparative " 80 -- A 10 10 0.15 0.15 0.1Example 41Example 140 " 70 10 A 10 10 0 0 0Example 141 " 70 10 A 10 10 0.05 0.05 0.1Example 142 " 70 10 A 10 10 0.15 0.15 0.1Example 143 " 60 20 A 10 10 0.15 0.15 0.1Example 144 " 50 30 A 10 10 0.15 0.15 0.1Example 145 " 75 10 A 5 10 0.15 0.15 0.1Example 146 " 70 10 B 10 10 0.15 0.15 0.1Example 147 " 30 50 A 10 10 0.15 0.15 0.1Example 148 E 30 50 A 10 10 0.15 0.15 0.1Example 149 F 30 50 A 10 10 0.15 0.15 0.1Example 150 G 30 50 A 10 10 0.15 0.15 0.1Example 151 H 30 50 A 10 10 0.15 0.15 0.1Example 152 A 65 10 A 10 15*.sup.1 0.15 0.15 0.1Example 153 " 65 10 A 10 15*.sup.2 0.15 0.15 0.1__________________________________________________________________________ *.sup.1 CaCO.sub.3 *.sup.2 wollastonite
TABLE 26__________________________________________________________________________ Izod Coating Test Impact CoatingNo. of Example Flexural Strength.sup.(1) Gloss Weathering Resistance and Adhesionor Comparative MFR Modulus 23.degree. C. GS Visual Appearance Evaluation StrengthExample (g/10 min) (kg/cm.sup.2) notched (60%) 250 500 750 1000 1250 1500 (g/cm .multidot. width)__________________________________________________________________________Comparative 10.2 15500 12.5 66 x x -- -- -- -- --Example 39Comparative 10.2 15500 12.5 66 .circleincircle. .circleincircle. x x -- -- --Example 40Comparative 10.2 15500 12.5 66 .circleincircle. .circleincircle. .circleincircle. x x -- --Example 41Example 140 13.7 15000 14.0 64 .DELTA. x x -- -- -- 300Example 141 13.7 15000 14.0 64 .circleincircle. .circleincircle. .circleincircle. x x -- 300Example 142 13.7 15000 14.0 64 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 300Example 143 15.2 14500 15.1 63 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 390Example 144 16.0 14300 15.6 61 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 440Example 145 11.0 15400 11.4 59 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 280Example 146 14.3 15200 11.8 68 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 280Example 147 23.7 11600 9.7 58 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 620Example 148 82.7 13600 6.5 68 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 580Example 149 14.9 10100 8.4 53 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 550Example 150 21.7 13500 3.7 70 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. x 350Example 151 19.3 9800 5.1 68 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 400Example 152 15.8 13800 14.6 71 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 330Example 153 10.0 12900 8.0 49 .circleincircle. .circleincircle. .DELTA. x x x 280__________________________________________________________________________
Examples 154 to 167 and Comparative Examples 42 to 44
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, the high-density ethylene polymer, and the inorganic filler in the amounts listed in Table 27 were used.
The results are shown in Table 28.
TABLE 27__________________________________________________________________________ High-density Propylene Amount of Ethylene Amount of StabilizerNo. of Example Polymer Modified Polymer (wt part)or Comparative Amount P.P. (A) Amount Talc Stabilizer Stabilizer StabilizerExample Kind (wt. %) (wt. %) Kind (wt. %) (wt. %) (A) (B) (C)__________________________________________________________________________Comparative A 80 -- A 10 10 0 0 0Example 42Comparative " 80 -- A 10 10 0.05 0.05 0.1Example 43Comparative " 80 -- A 10 10 0.15 0.15 0.1Example 44Example 154 " 70 10 A 10 10 0 0 0Example 155 " 70 10 A 10 10 0.05 0.05 0.1Example 156 " 70 10 A 10 10 0.15 0.15 0.1Example 157 " 60 20 A 10 10 0.15 0.15 0.1Example 158 " 50 30 A 10 10 0.15 0.15 0.1Example 159 " 60 10 A 20 10 0.15 0.15 0.1Example 160 " 70 10 A 10 10 0.15 0.15 0.1Example 161 " 30 50 A 10 10 0.15 0.15 0.1Example 162 E 30 50 A 10 10 0.15 0.15 0.1Example 163 F 30 50 A 10 10 0.15 0.15 0.1Example 164 G 30 50 A 10 10 0.15 0.15 0.1Example 165 H 30 50 A 10 10 0.15 0.15 0.1Example 166 A 65 10 A 10 .sup. 15*.sup.1 0.15 0.15 0.1Example 167 " 65 10 A 10 .sup. 15*.sup.2 0.15 0.15 0.1__________________________________________________________________________ *.sup.1 CaCO.sub.3 *.sup.2 wollastonite
TABLE 28__________________________________________________________________________ Izod Coating Test Impact CoatingNo. of Example Flexural Strength.sup.(1) Gloss Weathering Resistance and Adhesionor Comparative MFR Modulus 23.degree. C., GS Visual Appearance Evaluation StrengthExample (g/10 min) (kg/cm.sup.2) notched (60%) 250 500 750 1000 1250 1500 (g/cm .multidot. width)__________________________________________________________________________Comparative 7.8 15900 13.0 68 x x -- -- -- -- --Example 42Comparative 7.8 16000 13.0 68 .circleincircle. .DELTA. x x -- -- --Example 43Comparative 7.8 15900 13.0 68 .circleincircle. .circleincircle. .circleincircle. x x -- --Example 44Example 154 11.7 15500 14.8 66 .DELTA. x x -- -- -- 300Example 155 11.7 15500 14.8 66 .circleincircle. .circleincircle. .circleincircle. x x -- 300Example 156 11.7 15500 14.8 66 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 300Example 157 12.2 15100 16.1 64 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 400Example 158 14.3 14600 16.8 61 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 440Example 159 9.2 15100 33.7 60 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 300Example 160 16.3 15600 9.7 70 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 290Example 161 21.2 12200 10.0 60 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 650Example 162 74.9 13800 7.0 69 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. x 600Example 163 14.3 10500 8.9 53 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 580Example 164 19.7 13800 4.3 71 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. x 400Example 165 18.8 10200 5.8 68 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 400Example 166 15.2 14200 15.0 73 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 350Example 167 9.7 13300 8.8 50 .circleincircle. .circleincircle. x x x -- 300__________________________________________________________________________
Examples 168 to 181 and Comparative Examples 45 to 47
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, the ethylene-propylene copolymer rubber, the high-density ethylene polymer, the linear low-density ethylene copolymer, and the inorganic filler in the amounts listed in Table 29 were used.
The results are shown in Table 30.
TABLE 29__________________________________________________________________________ Linear Amount High-density low-density Propylene of Ethylene ethylene Amount of StabilizerNo. of Example polymer Modified Amount of Polymer copolymer (wt. parts)or Comparative Amount P.P. (A) EPR Amount Amount Talc Stabilizer Stabilizer StabilizerExample Kind (wt. %) (wt. %) (wt. %) Kind (wt. %) Kind (wt. %) (wt %) (A) (B) (C)__________________________________________________________________________Comparative A 70 -- 10 A 5 A 5 10 0 0 0Example 45Comparative " 70 -- 10 A 5 A 5 10 0.05 0.05 0.1Example 46Comparative " 70 -- 10 A 5 A 5 10 0.15 0.15 0.1Example 47Example 168 " 60 10 10 A 5 A 5 10 0 0 0Example 169 " 60 10 10 A 5 A 5 10 0.05 0.05 0.1Example 170 " 60 10 10 A 5 A 5 10 0.15 0.15 0.1Example 171 " 60 30 10 A 5 A 5 10 0.15 0.15 0.1Example 172 " 55 10 10 A 10 A 5 10 0.15 0.15 0.1Example 173 " 55 10 10 A 5 A 10 10 0.15 0.15 0.1Example 174 B 23 15 25 A 5 A 5 7 0.15 0.15 0.1 C 20Example 175 A 20 50 10 A 5 A 5 10 0.15 0.15 0.1Example 176 E 20 50 10 A 5 A 5 10 0.15 0.15 0.1Example 177 F 20 50 10 A 5 A 5 10 0.15 0.15 0.1Example 178 G 20 50 10 A 5 A 5 10 0.15 0.15 0.1Example 179 H 20 50 10 A 5 A 5 10 0.15 0.15 0.1Example 180 A 55 10 10 A 5 A 5 .sup. 15*.sup.1 0.15 0.15 0.1Example 181 " 55 10 10 A 5 A 5 .sup. 15*.sup.2 0.15 0.15 0.1__________________________________________________________________________ *.sup.1 CaCO.sub.3 *.sup.2 wollastonite
TABLE 30__________________________________________________________________________ Izod Impact Coating TestNo. of Example Flexural Strength.sup.(1) Gloss Weathering Resistance and Coatingor Comparative MFR Modulus -20.degree. C. GS Visual Appearance Evaluation AdhesionExample (g/10 min) (kg/cm.sup.2) notched (60%) 250 500 750 1000 1250 1500 Strength__________________________________________________________________________Comparative 8.8 13700 7.8 80 x x -- -- -- -- --Example 45Comparative 8.8 13700 7.8 80 .circleincircle. .circle. x x -- -- --Example 46Comparative 8.8 13700 7.8 80 .circleincircle. .circleincircle. .circleincircle. .DELTA. x x --Example 47Example 168 10.5 13300 8.2 77 .DELTA. x x -- -- -- 750Example 169 10.5 13300 8.2 77 .circleincircle. .circleincircle. .circleincircle. x x -- 750Example 170 10.5 13300 8.2 77 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 750Example 171 15.0 11600 9.6 75 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1050Example 172 9.7 12600 8.8 78 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 700Example 173 10.8 12400 8.4 78 .circle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 700Example 174 14.8 12000 50 or more 70 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1250Example 175 18.2 9800 7.0 60 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 1350Example 176 78.3 12100 5.8 75 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 1380Example 177 15.5 8800 6.6 68 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 1300Example 178 22.9 11400 2.7 80 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. x 1050 . -Example 179 21.8 8400 3.5 78 .circleincircle . .circleincircle. .circlei ncircle. .circleincircle. . circle. x 1000Example 180 8.8 12200 8.6 80 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. x 800Example 181 5.3 11900 4.4 63 .circleincircle. .circleincircle. .circleincircle. x x -- 560__________________________________________________________________________
Examples 182 to 194 and Comparative Examples 48 to 50
The propylene polymer compositions were prepared in the same manner as in Example 1, except that the propylene polymers, the modified propylene polymer, the ethylene-propylene copolymer rubber, the high-density ethylene polymer, and the linear low-density ethylene copolymer in the amounts listed in Table 31 were used.
The results are shown in Table 32.
TABLE 31__________________________________________________________________________ Linear Amount High-density low-density Propylene of Ethylene ethylene Amount of StabilizerNo. of Example polymer Modified Amount of Polymer copolymer (wt. parts)or Comparative Amount P.P.(A) EPR Amount Amount Stabilizer Stabilizer StabilizerExample Kind (wt. %) (wt. %) (wt. %) Kind (wt. %) Kind (wt. %) (A) (B) (C)__________________________________________________________________________Comparative A 80 -- 10 A 5 A 5 0 0 0Example 48Comparative " 80 -- 10 " 5 " 5 0.05 0.05 0.1Example 49Comparative " 80 -- 10 " 5 " 5 0.15 0.15 0.1Example 50Example 182 " 70 10 10 " 5 " 5 0 0 0Example 183 " 70 10 10 " 5 " 5 0.05 0.05 0.1Example 184 " 70 10 10 " 5 " 5 0.15 0.15 0.1Example 185 " 60 20 10 " 5 " 5 0.15 0.15 0.1Example 186 " 50 30 10 " 5 " 5 0.15 0.15 0.1Example 187 B 30 15 25 " 5 " 5 0.15 0.15 0.1 C 20Example 188 A 75 10 10 " 10 " 5 0.15 0.15 0.1Example 189 " 75 10 10 " 5 " 10 0.15 0.15 0.1Example 190 " 30 50 10 " 5 " 5 0.15 0.15 0.1Example 191 E 30 50 10 " 5 " 5 0.15 0.15 0.1Example 192 F 30 50 10 " 5 " 5 0.15 0.15 0.1Example 193 G 30 50 10 " 5 " 5 0.15 0.15 0.1Example 194 H 30 50 10 " 5 " 5 0.15 0.15 0.1__________________________________________________________________________
TABLE 32__________________________________________________________________________ Izod Coating Test Impact CoatingNo. of Example Flexural Strength.sup.(1) Gloss Weathering Resistance and Adhesionor Comparative MFR Modulus -20.degree. C. GS Visual Appearance Evaluation StrengthExample (g/10 min) (kg/cm.sup.2) notched (60%) 250 500 750 1000 1250 1500 (g/cm .multidot. width)__________________________________________________________________________Comparative 9.2 11500 8.1 87 x x -- -- -- -- --Example 48Comparative 9.2 11500 8.1 87 .circleincircle. .circle. x x -- -- --Example 49Comparative 9.2 11500 8.1 87 .circleincircle. .circleincircle. .circleincircle. .circle. x x --Example 50Example 182 10.7 11000 8.8 84 .DELTA. x x -- -- -- 900Example 183 10.7 11000 8.8 84 .circleincircle. .circleincircle. .circleincircle. .circle. x x 900Example 184 10.7 11000 8.8 84 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 900Example 185 13.0 10500 9.6 83 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1200Example 186 19.2 10200 10.1 83 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1440Example 187 13.7 7800 50 or more 75 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circle. 1500 or moreExample 188 10.3 10600 9.8 87 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. .DELTA. 880Example 189 11.0 10300 8.7 89 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 900Example 190 19.8 7800 7.2 74 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1500 or moreExample 191 83.6 10000 6.0 81 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1500 or moreExample 192 16.8 6800 6.8 72 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1300Example 193 24.0 9400 2.7 89 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1150Example 194 24.0 6400 3.8 84 .circleincircle. .circleincircle. .circleincircle. .circleincircle. .circleincircle. x 1250__________________________________________________________________________
Reference Example 1
The weathering resistant properties of ethylene-propylene block copolymer having an ethylene content of 8.8% by weight and an MFR of 15 g/10 min and the modified propylene polymer obtained by modifying this propylene polymer as mentioned above. The compositions were comparatively evaluated in the same manner as in Example 1.
The results are as follows.
TABLE 34______________________________________ Weathering Resist- Weathering Resistant ance and Visual Stabilizer Appearance Evalu- Stabilizer Stabilizer ation (hrs)Polymer (A) (B) 100 300 500______________________________________Propylene 0 0 o x --copolymerPropylene 0.05 0.05 o o .DELTA.copolymerModified 0 0 o x --propylenecopolymerModified 0.05 0.05 o o .DELTA.propylenecopolymer______________________________________

Number	Date	Country
60-113279	May 1985	JPX
60-203498	Sep 1985	JPX
60-258606	Nov 1985	JPX
61-48619	Mar 1986	JPX

Number	Date	Country
58-111846	Jul 1983	JPX
58-191706	Nov 1983	JPX
58-219244	Dec 1983	JPX
59-26258	Feb 1984	JPX
59-196344	Nov 1984	JPX
59-204642	Nov 1984	JPX
60-49045	Mar 1985	JPX
60-49046	Mar 1985	JPX

Propylene polymer composition

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Entry
Derwent Abs. 85-113504/19 (C85-049178), Mar. 29, 1985, Showa Denko KK, J60055012.
Derwent Abs. 85-113535/19 (C85-049209), Mar. 29, 1985, Showa Denko KK, J60055052.
Derwent Abs. 85-118752/20 (C85-051384), Apr. 4, 1985, Showa Denko KK, J60058410.
Derwent Abs. 84-309751/50, Nov. 2, 1984, J59193942, Showa.
Derwent Abs. 84-297441/48, Oct. 19, 1984, J59184247, Showa.