Patent Application
20200230036
The present invention relates to a water-in-oil emulsion cosmetic. More specifically, the present invention relates to a solid or semi-solid cosmetic, particularly a cosmetic that provides excellent hairstyling effects and imparts moistness without causing stickiness when applied to keratin fibers such as hair.
In general, hairstyling resins and oil components such as waxes are contained in hairstyling agents to achieve good hairstyle and improve setting property and keepability for hair. However, in recent years, there has been a trend towards favoring hairstyles having a natural impression without glossiness or shininess. Additionally, as for the texture, the user aspires non-sticky cosmetics.
For example, Patent Document 1 proposes a hairstyling cosmetic having natural hairstyling properties with little stickiness, which can be obtained by blending a water-soluble polymer as a hairstyling resin into a wax and a fluid oil component.
Additionally, Patent Document 2 proposes an emulsion-type hair cosmetic that allows hair to be easily arranged and that has little oiliness or stickiness, which can be obtained by blending a vegetable-derived semi-solid oil component, candelilla wax, a liquid oil component, and a complex obtained from a surfactant and a higher fatty acid.
However, when a large quantity of a wax or a hairstyling resin is added, the hairstyling effects are improved, whereas oiliness and stiffness occur. Thus, the needs of consumers who sought natural (hair) styling were not being adequately met. Additionally, although the stickiness due to hairstyling agents has been reduced to a certain degree, the actual situation is such that, with regard to most hairstyling agents, the consumer must wipe or wash away the hairstyling agent that remains on the hands after use and a hairstyling agent that does not leave stickiness has not been realized.
An objective of the present invention is to provide a water-in-oil emulsion cosmetic that has excellent hairstyling effects, that has a strong function of imparting moistness to the tissues to which it is applied, that has a dry feeling unlike that of a cream or a wax when taken on a finger, and that does not cause stickiness in the hands or the hair.
As a result of carrying out diligent investigations towards solving the aforementioned problem, the present inventors discovered that, in a cosmetic containing a cross-linked siloxane elastomer, a solid oil component, a liquid oil component and water, by adjusting the amounts of the solid oil component and the liquid oil component to a specific ratio, hairstyling effects are obtained while suppressing the stickiness to the limit, providing a dry feeling unlike that of a cream or a wax when taken on a finger. Thus, the present invention was completed.
In other words, the present invention provides a water-in-oil emulsion cosmetic comprising:
(A) a cross-linked siloxane elastomer;
(B) a solid oil component;
(C) a liquid oil component; and
(D) 55% by mass or more of water; wherein
a blending ratio ((B)/(C)) between component (B) and component (C) is 0.25 to 1.5. Furthermore, the cosmetic according to the present invention is preferably solid or semi-solid and not in a stick form.
By having the above-mentioned features, the present invention provides a cosmetic that has the function of imparting moistness to the tissues to which it is applied, that lacks stickiness, and that is dry to the touch. In particular, when applied to keratin tissues such as hair, it provides hairstyling effects such as improving the conformity of split hairs, sideburns and the like, and smoothing the surface of the hair, and can impart natural gloss to the hair and the like.
As mentioned above, the water-in-oil emulsion cosmetic of the present invention is characterized by comprising: (A) a cross-linked siloxane elastomer; (B) a solid oil component; (C) a liquid oil component; and (D) water. Hereinafter, the respective components constituting the cosmetic of the present invention will be explained in detail.
The (A) cross-linked siloxane elastomer (hereinafter sometimes referred to simply as “component (A)”) blended into the water-in-oil emulsion cosmetic according to the present invention is a siloxane elastomer (silicone elastomer) obtained by three-dimensionally cross-linking polydimethyl siloxane, and may be emulsifying or non-emulsifying.
There is no particular limitation on the emulsifying cross-linked siloxane elastomer, but examples include cross-linked polyoxyethylene methyl polysiloxanes, alkyl group-containing cross-linked polyoxyethylene methyl polysiloxanes, cross-linked polyglycerin-modified silicones, alkyl group-containing cross-linked polyglycerin-modified silicones and the like. As these emulsifying cross-linked siloxane elastomers, it is possible to use those that are commercially available in a swollen form, in which they are swollen by various types of oil components such as silicone oils, mineral oils, triethylhexanoin and squalane. Specific examples include those mentioned below.
Examples of swollen polyoxyethylene methyl polysiloxane cross-polymers include KSG-210 (mixture of ((PEG-10/15)/dimethicone) cross-polymer and dimethicone, 20% to 30% cross-linked) (manufactured by Shin-etsu Chemical), 9011 Silicone Elastomer Blend (mixture of (PEG-12/dimethicone) cross-polymer and cyclomethicone) (manufactured by Dow Corning Toray) and the like.
Examples of swollen alkyl group-containing polyoxyethylene methyl polysiloxane cross-polymers include KSG-310 (mixture of(PEG-15/lauryl dimethicone) cross-polymer and mineral oil, 25% to 35% cross-linked), KSG-320 (mixture of (PEG-15/lauryl dimethicone) cross-polymer and isododecane, 20% to 30% cross-linked), KSG-330 (mixture of (PEG-15/lauryl dimethicone) cross-polymer and triethylhexanoin, 15% to 25% cross-linked), KSG-340 (mixture of (PEG-15/lauryl dimethicone) cross-polymer, (PEG-10/lauryl dimethicone) cross-polymer and squalane, 25% to 35% cross-linked) (all of the above manufactured by Shin-etsu Chemical) and the like.
Examples of swollen polyglycerin-modified silicone cross-polymers include KSG-710 (mixture of (dimethicone/polyglycerin-3) cross-polymer and dimethicone, 20% to 30% cross-linked) (manufactured by Shin-etsu Chemical) and the like.
Examples of swollen alkyl group-containing polyglycerin-modified silicone cross-polymers include KSG-810 (mixture of (lauryl dimethicone/polyglycerin-3) cross-polymer and mineral oil, 25% to 35% cross-linked), KSG-820 (mixture of (lauryl dimethicone/polyglycerin-3) cross-polymer and isododecane, 20% to 30% cross-linked), KSG-830 (mixture of (lauryl dimethicone/polyglycerin-3) cross-polymer and triethylhexanoin, 15% to 25% cross-linked), KSG-840 (mixture of (lauryl dimethicone/polyglycerin-3) cross-polymer and squalane, 25% to 35% cross-linked) (all of the above manufactured by Shin-etsu Chemical) and the like.
There is no particular limitation on the non-emulsifying cross-linked siloxane elastomer, but examples include methyl polysiloxane cross-polymers, methyl phenyl polysiloxane cross-polymers, vinyl dimethicone/lauryl dimethicone cross-polymers, lauryl polydimethylsiloxyethyl dimethicone/bis-vinyl dimethicone cross-polymers, alkyl (C30-45) cetearyl dimethicone cross-polymers, cetearyl dimethicone cross-polymers and the like. As these non-emulsifying cross-linked siloxane elastomers, it is possible to use those that are commercially available in a swollen form, in which they are swollen by various types of oil components such as silicone oils, mineral oils, triethylhexanoin and squalane. Specific examples include those mentioned below.
Examples of swollen methyl polysiloxane cross-polymers include swollen dimethicone cross-polymers such as 9040 Silicone Elastomer Blend (mixture of dimethicone cross-polymer and cyclopentasiloxane, 12% cross-linked), 9041 Silicone Elastomer Blend (mixture of dimethicone cross-polymer and dimethicone 5 mPa·s, 16% cross-linked), 9045 Silicone Elastomer Blend (mixture of dimethicone cross-polymer and cyclopentasiloxane, 12.5% cross-linked) and EL-80401D Silicone Organic Blend (mixture of dimethicone cross-polymer and isododecane, 18% cross-linked) (all of the above manufactured by Dow Corning Toray), and swollen dimethicone/vinyl dimethicone cross-polymers such as KSG-15 (mixture of (dimethicone/vinyl dimethicone) cross-polymer and cyclopentasiloxane, 4% to 10% cross-linked), KSG-16 (mixture of (dimethicone/vinyl dimethicone) cross-polymer and dimethicone 6 mPa·s, 20% to 30% cross-linked) and KSG-1610 (mixture of (dimethicone/vinyl dimethicone) cross-polymer and methyl trimethicone, 15% to 20% cross-linked) (all of the above manufactured by Shin-etsu Chemical), and the like.
Examples of swollen methyl phenyl polysiloxane cross-polymers include KSG-18A (mixture of (dimethicone/phenyl vinyl dimethicone) cross-polymer and diphenyl siloxyphenyl trimethicone, 10% to 20% cross-linked) (manufactured by Shin-etsu Chemical) and the like.
Examples of swollen vinyl dimethicone/lauryl dimethicone cross-polymers include KSG-41A (mixture of (vinyl dimethicone/lauryl dimethicone) cross-polymer and mineral oil, 20% to 30% cross-linked), KSG-42A (mixture of (vinyl dimethicone/lauryl dimethicone) cross-polymer and isododecane, 15% to 25% cross-linked), KSG-43 (mixture of (vinyl dimethicone/lauryl dimethicone) cross-polymer and triethylhexanoin, 25% to 35% cross-linked), KSG-44 (mixture of (vinyl dimethicone/lauryl dimethicone) cross-polymer and squalane, 25% to 35% cross-linked) (all of the above are manufactured by Shin-etsu Chemical) and the like.
Examples of swollen lauryl polydimethylsiloxyethyl dimethicone/bis-vinyl dimethicone cross-polymers include KSG-042Z (mixture of (lauryl polydimethylsiloxyethyl dimethicone/bis-vinyl dimethicone) cross-polymer and isododecane, approximately 20% cross-linked), KSG-045Z (mixture of (lauryl polydimethylsiloxyethyl dimethicone/bis-vinyl dimethicone) cross-polymer and cyclopentasiloxane, approximately 20% cross-linked) (all of the above are manufactured by Shin-etsu Chemical) and the like.
Examples of swollen alkyl (C30-45) cetearyl dimethicone cross-polymers include VELVESIL 125 (mixture of alkyl (C30-45) cetearyl dimethicone cross-polymer and cyclopentasiloxane, approximately 12.5% cross-linked), VELVESIL 034 (mixture of alkyl (C30-45) cetearyl dimethicone cross-polymer and caprylyl methicone, approximately 16% cross-linked) (both of the above are manufactured by Momentive Performance Materials) and the like.
Examples of swollen cetearyl dimethicone cross-polymers include VELVESIL DM (mixture of cetearyl dimethicone cross-polymer and dimethicone 5 mPa·s, approximately 17% cross-linked) (manufactured by Momentive Performance Materials) and the like.
The blended amount of component (A), relative to the total amount of the water-in-oil emulsion cosmetic, should be 0.01% to 10% by mass, preferably 0.1% to 8% by mass, more preferably 0.4% to 5% by mass, and even more preferably 0.4% to 3% by mass. If the blended amount of component (A) is less than 0.01% by mass, stickiness occurs and when applied to the hair, an unnatural shininess occurs, whereas if more than 10% by mass is blended, the feeling in use becomes oily and the setting property during hairstyling is worsened, so that the blended amount in such ranges cannot be favorable.
As component (A) in the present invention, it is possible to use one component selected from a group consisting of the above-mentioned emulsifying cross-linked siloxane elastomers and non-emulsifying cross-linked siloxane elastomers or a combination of two or more components selected therefrom. Additionally, in order to improve the dry-feeling in use, it is preferable to use a combination of one or more components selected from a group consisting of the emulsifying cross-linked siloxane elastomers and one or more components selected from group consisting of the non-emulsifying cross-linked siloxane elastomers.
The (B) solid oil component (hereinafter referred to simply as “component (B)” in some cases) blended into the water-in-oil emulsion cosmetic according to the present invention is an oil component that is solid at standard temperature (25° C.) and that is normally used in cosmetics. Specific examples include natural and synthetic oils and fats, hydrocarbon oils, higher fatty acids, higher alcohols and ester oils.
Examples of oils and fats include cacao butter, coconut oil, hardened coconut oil, palm oil, palm kernel oil, Japan wax kernel oil, Japan wax, hardened castor oil and the like.
Examples of hydrocarbon oils include ozokerite, ceresin, polyethylene wax, microcrystalline wax, paraffin wax and the like.
Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid, undecylenic acid and the like.
Examples of higher alcohols include linear alcohols (for example, lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, cetostearyl alcohol, etc.); branched alcohols (for example, monostearyl glycerin ether (batyl alcohol)) and the like.
Examples of ester oils include myristyl myristate, cetyl myristate, stearyl stearate, cetyl stearate, cetyl palmitate, cholesteryl stearate, cholesteryl oleate, dextrin palmitate, inulin stearate, hydrogenated jojoba oil and the like.
Among the above-mentioned solid oil components, one or more types selected from among hydrocarbon oils and ester oils are preferable in view of non-stickiness and spreadability by hand.
In the water-in-oil emulsion cosmetic according to the present invention, it is possible to blend in a semi-solid oil component as the above-mentioned solid oil component. There is no limitation on the semi-solid oil component used in the present invention, but examples include vaseline, glyceryl trilanolate, soft lanolin acid, branched or hydroxylated cholesteryl fatty acids, dipentaerythritol fatty acid esters (such as dipentaerythritol hexaoxystearate), isostearic acid-hardened castor oil, monohydroxystearic acid-hardened castor oil, tri(caprylic/capric/myristic/stearic acid) glyceride, myristyl lactate, dimer dilinoleic acid-hydrogenated castor oil, (phytosteryl/behenyl) dimer dilinoleate, (phytosteryl/isostearyl/cetyl/stearyl/behenyl) dimer dilinoleate, phytosteryl oleate, pentaerythrityl tetra(behenate/benzoate/ethylhexanoate), dipentaerythrityl hexahydroxystearate and the like. In the cosmetic of the present invention, vaseline is preferably blended as the solid oil component in order to improve the hairstyling effects.
The blended amount of component (B), relative to the total amount of the water-in-oil emulsion cosmetic, should be 20% by mass or more, preferably 1.0% to 20% by mass. If the blended amount of component (B) is less than 1.0% by mass, sufficient hardness as a cosmetic cannot be obtained, whereas if more than 20% by mass is blended, the spreadability becomes poor, so that the blended amount in such ranges cannot be favorable.
The (C) liquid oil component (hereinafter sometimes referred to simply as “component (C)”) blended into the water-in-oil emulsion cosmetic according to the present invention is an oil component that is liquid at standard temperature (25° C.) and that is normally used in cosmetics. Specific examples include natural and synthetic oils and fats, fatty acids, ester oils, hydrocarbon oils, higher alcohols, silicone oils and the like.
Examples of oils and fats include linseed oil, camellia oil, macadamia nut oil, corn oil, olive oil, avocado oil, sasanqua oil, castor oil, safflower oil, apricot kernel oil, cinnamon oil, jojoba oil, grape oil, sunflower oil, almond oil, rapeseed oil, sesame oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, evening primrose oil and the like.
Examples of fatty acids include heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, pentadecanoic acid, heptadecanoic acid, nonadecanoic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid and the like.
Examples of ester oils include pentaerythritol tetraoctanoate, cetyl octanoate, hexyl laurate, isopropyl myristate, octyldodecyl myristate, octyl palmitate, isopropyl isostearate, octyl isopalmitate, isodecyl oleate, cetyl ethylhexanoate, glyceryl tri-2-ethylhexanoate and the like.
Examples of hydrocarbon oils include liquid paraffin, squalane, squalene, paraffin, isoparaffin, octane, decane, dodecane, isododecane, hexadecane, isohexadecane and the like.
Examples of higher alcohols include octyl alcohol, isostearyl alcohol, oleyl alcohol and the like.
Examples of silicone oils include branched silicones such as dimethyl polysiloxane, methylphenyl polysiloxane and methylhydrogen polysiloxane, cyclic silicones such as octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane, dodecamethyl cyclohexasiloxane and diphenylsiloxyphenyl trimethicone, and the like.
The blended amount of component (C), relative to the total amount of the water-in-oil emulsion cosmetic, should be 1.0% to 40% by mass, preferably 3.0% to 30% by mass and more preferably 5.0% to 25% by mass. If the blended amount of component (C) is less than 1.0% by mass, the spreadability at the time of application is poor, whereas if more than 40% by mass is blended, stickiness occurs and when applied to the hair, an unnatural shininess occurs, so that the blended amount in such ranges is not favorable.
In order to suppress stickiness and improve spreadability in the water-in-oil emulsion cosmetic according to the present invention, the blending ratio ((B)/(C)) between the (B) solid oil component and the (C) liquid oil component should be 0.25 to 1.5 in terms of the ratio by mass, more preferably 0.5 to 1.2. If the blending proportion of component (B) is high, stickiness occurs and the spreadability becomes poor. Additionally, if the blending proportion of component (C) is high, the hairstyling effects become weaker.
The water-in-oil emulsion cosmetic according to the present invention further contains (D) water (hereinafter sometimes referred to simply as “component (D)”) as an essential component.
The blended amount of component (D) is 55% by mass or more relative to the total amount of the water-in-oil emulsion cosmetic. If the water content is less than 55% by mass, then there is a tendency for stickiness to occur and for the hairstyling effects on hair and the like to become worse.
The cosmetic of the present invention may contain, in addition to the above-mentioned essential components (A) to (D), other optional components that may be blended into cosmetics, within a range in which the effects of the present invention are not lost. Examples of optional components include those indicated below.
By blending in an (E) surfactant, the emulsion stability can be improved. The (E) surfactant to be blended into the cosmetic according to the present invention is a surfactant that is normally used when manufacturing a water-in-oil emulsion, and there is no particular limitation thereon, but examples include non-ionic surfactants, silicone-based surfactants and the like having an HLB of 8 or lower. Among these, it is preferably to use silicone-based surfactants in view of the lack of stickiness and the lightness. Silicone-based surfactants refer to polyether-modified silicones that have polyoxyalkylene structures introduced on a silicone skeleton, and that are not cross-linked.
Specific examples of silicone-based surfactants include polyether-modified silicones such as PEG-10 dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone and lauryl PEG-9 polydimethylsiloxyethyl dimethicone. These may be blended as one type or by mixing two or more types.
Additionally, the silicone-based surfactant may be blended in the state of a silicone gel comprising that surfactant and a solvent, and a commercially available silicone gel may be used. Examples include KF-6017, KF-6028, KF-6038 (all of the above are manufactured by Shin-etsu Chemical) and the like. Oil components that are contained, as solvents, in these silicone gels are also classified as the above-mentioned component (C), and it goes without saying that the blended amounts thereof are included in the blended amount of component (C).
The blended amount of the (E) surfactant in the cosmetic of the present invention should normally be 0.05% to 20% by mass, preferably 0.1% to 10% by mass and more preferably 0.5% to 5% by mass.
By blending in a (F) humectant, it is possible to improve the moisture retention in the tissue (hair, skin or the like) after the cosmetic has been applied.
Specific examples of humectants include glycols such as propylene glycol, dipropylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, diethylene glycol, triethylene glycol and polyethylene glycol; glycerins such as glycerin, diglycerin and polyglycerin; sugar alcohols such as sorbitol, mannitol, maltitol, xylitol and erythritol; sugars such as fructose, glucose, galactose, maltose, lactose and trehalose; and the like.
When blending a humectant into the cosmetic of the present invention, the blended amount thereof should normally be 0.1% to 50% by mass, preferably 1% to 30% by mass, and more preferably 5% to 20% by mass.
Examples of optional components other than those mentioned above include thickeners, ceramides, vitamins, UV absorbers, chelating agents, anti-bacterial agents, preservatives, vegetable extracts, amino acids, various types of medicinal agents, lower alcohols such as ethanol, and the like.
The cosmetic of the present invention can be produced in accordance with conventionally used methods. Stated simply, it can be produced by mixing the oil-based components and the water-based components while respectively heating if needed, emulsifying the water phase in the oil phase, and then filling a container with the resulting emulsion and gradually cooling the emulsion.
The cosmetic of the present invention comprises a large amount of water, so that moisture can be imparted to tissues (hair, skin and the like) to which the cosmetic is applied. Additionally, characteristic hardness is obtained by adjusting the blended amounts of the solid oil component and the liquid oil component in a specific ratio, so that sense of stickiness can be little, and further, when applied to the skin, the emulsion breaks down and the water in the internal phase thereof is released, so that a watery texture can be provided. Furthermore, a dry texture is obtained by blending a siloxane elastomer.
The hardness of the cosmetic of the present invention is preferably 50 to 500, more preferably 75 to 450, and even more preferably 100 to 400. In this case, “hardness” refers to the value obtained by measuring the cosmetic after being placed, the day after manufacture, for three hours in a 25° C. constant-temperature chamber, using a rheometer (COMPAC 100-II, manufactured by SUN) with a load of 200 g, an 8$ pressure-sensing shaft, a needle insertion depth of 10.0 mm and a needle insertion speed of 300 mm/min.
The cosmetic of the present invention is a solid or semi-solid cosmetic that is contained, for example, in a wide-mouthed container or the like. The cosmetic of the present invention does not include cosmetics in a stick form. Additionally, the cosmetic of the present invention is preferably used by being taken and applied by the hands and fingers. When taking over the cosmetic on the hands and fingers, the cosmetic can be taken out directly using a finger from the container or using a tool such as a spatula therefrom.
The cosmetic of the present invention is also known as a balm base and may be used to care for the entire body, and since it has good spreadability and has hairstyling effects, it is preferably used for keratin tissue care and hairstyling. Additionally, the cosmetic of the present invention is not sticky, so that wiping or washing away the cosmetic remaining on the hands and fingers after use cannot be needed even when used as a hairstyling cosmetic.
The present invention will be explained in further detail by providing examples below, but the present invention is not in any way limited to these examples. The blended amounts are in percentage by mass where not noted otherwise.
Water-in-oil emulsion cosmetics having the compositions indicated in Table 1 below were prepared by mixing the oil-based components and the water-based components included in the compositions of each example while respectively heating components, emulsifying the water phase into the oil phase, and then filling a container with the resulting emulsion and gradually cooling the emulsion. The following tests were carried out on the prepared cosmetics.
Actual texture tests were performed by ten expert panelists. The usage property categories were lack of stickiness (non-stickiness) in hands and hair, spreadability by hand, arrangeable property (ease of preparation of hairstyle) and setting property (retention of hairstyle), each of the categories being evaluated on the basis of the following criteria. The results are shown in the table.
A: Nine or more panelists replied that the effects were excellent.
B: Seven or eight panelists replied that the effects were excellent.
C: Three to six panelists replied that the effects were excellent.
D: Two or fewer panelists replied that the effects were excellent.
When the blended amount of water was less than 55% by mass (Comparative Example 1 and Comparative Example 4), a tendency for stickiness to occur and for the arrangeable property (at ease setting hairstyle) and hair setting property (holding set-hairstyle) to be worse was observed. When the blending proportion of the solid oil component was made high (component (B)/component (C)=2.0, Comparative Example 2), the setting property was good, but the arrangeable property was poor, the cosmetic was difficult to spread, and stickiness occurred. Conversely, when the blending proportion of the solid oil component was made low (component (B)/component (C)=0.21, Comparative Example 3), the cosmetic was easy to spread and there was no stickiness, but both the arrangeable property and the setting property were worse.
In contrast to the above-mentioned comparative examples, when the essential components of the present invention were blended and the blending ratio between the solid oil component and the liquid oil component was 0.25 to 1.5, cosmetics having sufficient hairstyling performance and also performing well in terms of spreadability and stickiness were obtained in all cases.
2. Stickiness (Rolling Resistance) when Dried after Application
Next, a hair wax comprising the composition indicated below was prepared by heating and melting (2) to (10) to form an oil phase; adding (12), (13) and (15) to (11), and after stirring and dissolving the added components, adding (1) and homogeneously dispersing this mixture to obtain a water phase; adding the oil phase to the water phase and emulsifying the mixture, then adding (14) and (16). The hair wax prepared in this way was measured, as Comparative Example 5, together with the aforementioned Example 10, for the rolling resistance, according to the method described below, and stickiness evaluations were compared.
Samples of the aforementioned Example 10 and Comparative Example 5 were measured for stickiness when dry by measuring the rolling resistance between a sample and a probe using the apparatus described in Japanese Patent No. 3945729. The measurement conditions were set so that the sliding speed was 1.2 cm/s, the sliding stroke was 20 mm, the sample amount was 20 μL, the stage temperature was 32° C., the room temperature was 25° C. and the relative humidity was 50%. The results are shown in
As is clear from the results in Table 1, it was confirmed that the sample in Example 10 had lower rolling resistance and less stickiness when dried than the sample in Comparative Example 5. In
Additionally, as is clear from the results in
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2018/031309 | 8/24/2018 | WO | 00 |
