| US 7,553,887 B2 | ||
| Resin composition for automotive parts | ||
| Yoshio Sugimoto, Sodegaura (Japan); Ikunori Sakai, Sodegaura (Japan); Yusuke Umetani, Toyota (Japan); Naoki Shoji, Toyota (Japan); Keita Nagano, Nara (Japan); Takao Mizoshita, Yao (Japan); and Isamu Yamaguchi, Tokyo (Japan) | ||
| Assigned to Prime Polymer Co., Ltd., Tokyo (Japan) | ||
| Filed on Aug. 22, 2003, as Appl. No. 10/645,608. | ||
| Claims priority of application No. 2002-242216 (JP), filed on Aug. 22, 2002. | ||
| Prior Publication US 2005/0250892 A1, Nov. 10, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C08J 3/00 (2006.01); C08K 3/08 (2006.01); C08K 9/00 (2006.01); C08K 9/04 (2006.01); C08L 53/00 (2006.01); C08L 83/00 (2006.01); C09B 67/00 (2006.01); C09D 5/38 (2006.01); C09J 7/02 (2006.01) | ||
| U.S. Cl. 523—200 [523/202; 523/205; 523/206; 524/441; 524/502; 524/505; 525/88; 525/93; 525/95] | 8 Claims |
| 1. A resin composition for automotive parts comprising:
(1) a propylene polymer composition comprising
50% to 70% by weight of a crystalline propylene/ethylene block copolymer (a-1) or a blend of (a-1) and a crystalline propylene
homopolymer (a-2) having not greater than an equivalent weight of (a-1),
18 to 25% by weight of an elastomeric polymer (b), wherein said elastomeric polymer (b) comprises:
10 to 20% by weight of a copolymer (b-1) of ethylene and an α-olefin having at least 6 carbon atoms having a melt flow rate
(ASTM D-1238, 230° C., 2160 g load) of 0.5 to 10 g /10 min,
1 to 5% by weight of an ethylene/α-olefin/nonconjugated polyene random copolymer (b-2) having a melt flow rate (ASTM D-1238,
230° C., 2160 g load) of not greater than 1 g /10 min, and
1 to 10% by weight of a hydrogenated block copolymer (b-3) that is a hydrogenated product of a block copolymer containing
a polymer block of monovinyl-substituted aromatic hydrocarbon compound and a polymer block of a conjugated diene compound,
and
15 to 25% by weight of an inorganic filler (c),
wherein the total amount of the respective components is made 100% by weight, and,
(2) an aluminum flake pigment comprising aluminum flakes, which surface is coated with a polymer containing as constituent
units acrylic acid, an acrylic acid ester, epoxylated polybutadiene and divinylbenzene, wherein the aluminum flake pigment
is contained in 0.005 to 10 parts by weight based on 100 parts by weight of the propylene polymer composition.
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