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. 27, 1984
Filed:
Dec. 23, 1982
Osamu Fukui, Toyonaka, JP;
Yoshiro Umemoto, Nagoya, JP;
Tsugumi Sanmiya, Toyota, JP;
Yutaka Sano, Kishiwada, JP;
Kazuyoshi Tanaka, Sakai, JP;
UBE Industries, Osaka, JP;
Toyota Jidosha Kabushiki Kaisha, Osaka, JP;
Abstract
A polypropylene composition useful for producing a shaped article, for example, a bumper, having excellent rigidity, resistance to mechanical impact at a low temperature and superior lacquer-bonding property and appearance, comprises: (A) 40% to 75% by weight of at least one crystalline ethylene-propylene block copolymer in which the content of the polymerized ethylene is in the range of from 5% to 10% by weight, in which the polypropylene component has a fraction thereof insoluble in boiling n-heptane, in an amount of 97% or more, in which a fraction of the block copolymer soluble in p-xylene at room temperature, has an intrinsic viscosity of from 2.5 to 4 determined in decahydronaphthalene at a temperature of 135.degree. C. and which has a melt flow index of from 11 to 70; (B) 20% to 40% by weight of at least one amorphous ethylene-propylene copolymer having an intrinsic viscosity of from 1.0 to 2.0 determined in decahydronaphthalene at a temperature of 135.degree. C., and a Mooney viscosity ML.sub.1+4 of from 5 to 40 determined at a temperature of 100.degree. C.; and (C) 5% to 20% by weight of talc in the form of fine particles having an average size of from 0.1 to 5 microns.