The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 1998
Filed:
Apr. 24, 1996
Hajime Sadatoshi, Ichihara, JP;
Kenichi Ohkawa, Ichihara, JP;
Teruhiko Doi, Sodegaura, JP;
Yuichi Miyake, Nagoya, JP;
Takao Nomura, Toyota, JP;
Takeyoshi Nishio, Okazaki, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A thermoplastic resin composition which has a melt flow rate of 20 to 30 g/10 min and a flexural modulus at 23.degree. C. of 30,000 kg/cm.sup.2 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 �.eta.! of 0.95 to 1.15 dl/g as measured at 135.degree. 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 .mu.m 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.