C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 53/00 (2006.01) C08K 3/34 (2006.01) C08L 23/12 (2006.01)
Patent
CA 2175117
A thermoplastic resin composition which has a melt flow rate of 25 to 30 g/10 min and a flexural modu- lus at 23°C of 20,000 kg/cm2 or more and which comprises (1) 78 to 87% by weight of a specific crystalline polypropylene [referred to hereinafter as (A)] in which the propylene homopolymer portion has a Q value of 3.0 to 5.0, an isotactic pentad fraction of 0.975 or more and an intrinsic viscosity [?] of 1.00 to 1.10 dl/g as measured at 135°C in tetralin, (2) 3 to 10% by weight of at least two specific rubber components selected from the group consisting of (B) 1 to 9% by weight of an ethylene- butene-1 copolymer rubber, (C) 1 to 9% by weight of an ethylene-propylene copolymer rubber and (D) 1 to 9% by weight of an alkenyl aromatic compound-containing rubber; and (3) 10 to 12% by weight of talc having an average particle diameter of 4 µm or less, and an injection molded article of the thermoplastic resin composition, said thermoplastic resin composition satisfying the impact strength and rigidity required as a material for an interior automotive trim and having a short molding cycle and good surface quality.
Doi Teruhiko
Miyake Yuichi
Nishio Takeyoshi
Nomura Takao
Ohkawa Kenichi
Marks & Clerk
Sumitomo Chemical Co. Ltd.
Toyota Jidosha Kabushiki Kaisha
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