Claims
- 1. A thermoplastic compound, comprising:
- (i) a thermoplastic resin;
- (ii) 20 to 80% by weight, based on the total weight of the filler and of the resin, of pulverulent mineral filler;
- (iii) 0.25% to 3.0% by weight, based on the total weight of the pulverulent mineral filler, of a styrene-maleic anhydride copolymer;
- (iv) optionally, a conventional additive;
- wherein said thermoplastic resin is selected from the group consisting of (a) a hydrocarbon homopolymer without an aryl group, (b) a copolymer without an aryl group and consisting of carbon, hydrogen and oxygen atoms in which the oxygen atom content does not exceed 22% by weight and (c) a mixture of said homopolymer and said copolymer;
- wherein said pulverulent mineral filler is basic or with a surface that contains free hydroxyl groups;
- wherein said styrene-maleic anhydride has a weight average molecular weight between 1000 and 3000; and
- wherein said additive is selected from the group consisting of thermal stabilizer, photochemical stabilizer, antioxidant, lubricant, plastifier, anitstatic agent, fireproofing agent, deactivator of metals, glass ball, mineral fiber, organic fiber and pigment.
- 2. The composition of claim 1, wherein component (i) is selected from the group consisting of a homopolymer or copolymer of each of ethylene, propylene, butene, butadiene, butylene, butylene isomer and ethylene-vinyl acetate; and
- wherein component (ii) is selected from the group consisting of natural or synthetic calcium carbonate, talc, kaolin, wollastonite, pyrogenetic silica, magnesium hydroxide, aluminum hydroxide, and mixtures thereof; and
- wherein component (iii) is present in an amount of from 0.5% to 1.0% by weight based on the total weight of the pulverulent mineral filler.
- 3. The composition of claim 1, wherein component (i) is a polypropylene.
- 4. The composition of claim 1, wherein said styrene-maleic anhydride copolymer has a weight average molecular weight between 1500 and 2000.
- 5. The composition of claim 1, wherein said thermoplastic resin is selected from the group consisting of polypropylene homopolymer and copolymer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
95 15012 |
Dec 1995 |
FRX |
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Parent Case Info
This application is a division of Ser. No. 08/767,431, Dec. 16, 1996, U.S. Pat. No. 5,786,415.
US Referenced Citations (6)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0 042 724 |
Dec 1981 |
EPX |
0 156 072 |
Oct 1985 |
EPX |
0 224 688 |
Jun 1987 |
EPX |
Non-Patent Literature Citations (2)
Entry |
Database WPI, Derwent Publications Ltd., AN 93-232524, JP 5-156128, Jun. 22, 1993. |
Database WPI, Derwent Publications, Ltd., AN 84-130921, JP 5-9066434, Apr. 14, 1994. |
Divisions (1)
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Number |
Date |
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Parent |
767431 |
Dec 1996 |
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