C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 53/00 (2006.01) C08K 7/08 (2006.01)
Patent
CA 2175120
A thermoplastic resin composition which has a melt flow rate of 20 to 30 g/10 min and a flexural modulus at 23°C of 30,000 kg/cm or more and which comprises (A) 60 to 75% by weight of a specific crystalline polypropylene 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 0.95 to 1.15 dl/g as measured at 135°C in tetralin, (B) 2 to 8% by weight of an ethylene-butene-1 copolymer rubber, (C) 2 to 8% by weight of an ethylene-propylene copolymer rubber, (D) 10 to 20% by weight of talc having an average particle diameter of 4 µm or less, and (E) 5 to 20% by weight of fibrous magnesium oxysulfate, 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 instrumental panel and having a short molding cycle and good surface quality.
Doi Teruhiko
Miyake Yuichi
Nishio Takeyoshi
Nomura Takao
Ohkawa Kenichi
Marks & Clerk
Sumitomo Chemical Company Limited
Toyota Jidosha Kabushiki Kaisha
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