Claims
- 1. A thermoplastic elastomer composition which comprises (A) 20-80% by weight of a polypropylene resin, (B) 5-38% by weight of an ethylene copolymer having 82-98.7 mol % of an ethylene unit, 1-15 mol % of an ester unit selected from the group consisting of alkyl acrylate and alkyl methacrylate containing an alkyl group of 1-8 carbon atoms and 0.3-3 mol % of an unsaturated dicarboxylic acid anhydride unit and (C) 10-70% by weight of at least one of an ethylenepropylene copolymer rubber and an ethylene-propylene-nonconjugated diene copolymer rubber which contain 50-85 mol % of an ethylene unit and have a Mooney viscosity (ML.sub.1+4 100.degree. C.) of 20-100 and an iodine value of 20 or less.
- 2. A thermoplastic elastomer composition according to claim 1 wherein the polypropylene resin is at least one member selected from crystalline polypropylene, crystalline propylene-ethylene block and random copolymers and crystalline propylene-.alpha.-olefin copolymers.
- 3. A thermoplastic elastomer composition according to claim 1 wherein the polypropylene resin has a melt index (JIS K6758) of 0.5-100.
- 4. A thermoplastic elastomer composition according to claim 1 wherein the ester unit contained in the ethylene copolymer is a monomer selected from methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, 2-ethylhexyl methacrylate and butyl methacrylate.
- 5. A thermoplastic elastomer composition according to claim 1 wherein the unsaturated dicarboxylic acid anhydride unit is a monomer selected from maleic anhydride, citraconic anhydride, itaconic anhydride and tetrahydrophthalic anhydride.
- 6. A thermoplastic elastomer composition according to claim 5 wherein the unsaturated dicarboxylic acid anhydride is maleic anhydride.
- 7. A thermoplastic elastomer composition according to claim 1 wherein the ethylene copolymer has a melt index (JIS K6760) of 0.5-300.
- 8. A thermoplastic elastomer composition according to claim 1 wherein the ethylene-propylene copolymer rubber and ethylene-propylene-non-conjugated diene copolymer rubber is crosslinked with an organic peroxide.
- 9. A thermoplastic elastomer composition according to claim 1 wherein the non-conjugated diene is selected from methyltetrahydroindene, 5-vinylnorbornene, 5-ethylidene-2-norbornene, dicyclopentadiene, 1,4-hexadiene and 1,6-octadiene.
- 10. A molded product prepared from the composition as defined in claim 1.
- 11. A molded product comprising a part for an automobile prepared from the composition as defined in claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
61-105667 |
May 1986 |
JPX |
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RELATED APPLICATIONS
This application is a continuation-in-part of U.S. Application Ser. No. 046,939 filed May 5, 1987, now abandoned.
US Referenced Citations (3)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0058980 |
Sep 1982 |
EPX |
0184321 |
Jun 1986 |
EPX |
0213720 |
Mar 1987 |
EPX |
8604912 |
Aug 1986 |
WOX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
46939 |
May 1987 |
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