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:
Sep. 21, 1993
Filed:
Jun. 21, 1991
Masahiro Terada, Kanagawa, JP;
Hideyo Morita, Tokyo, JP;
Kohei Ueno, Osaka, JP;
Kazuyoshi Tanaka, Osaka, JP;
Nissan Motor Co., Ltd., , JP;
Ube Industries Ltd., , JP;
Abstract
The invention provides a moldable resin composition comprising (A) 50-73 wt % of a crystalline ethylene-propylene block copolymer in which the content of ethylene is 5-15 wt %, (B) 10-20 wt % of a hydrogenated block copolymer consisting of (i) 10-40 wt % of blocks of an aromatic vinyl compound polymer and (ii) 90-60 wt % of blocks of a conjugated diene polymer, (C) 2-7 wt % of an amorphous ethylene-propylene copolymer in which the content of propylene is 20-30 wt % and (D) 15-25 wt % of talc, with the proviso that the total amount of (B) and (C) is 12-25 wt %. The particulars of the components (A) to (D), including the degree of solubility of the polypropylene component of the block copolymer (A), the degree of hydrogenation of each of the blocks (i) and (ii) of the copolymer (B), Mooney viscosity of the copolymer (C) and the particle size distribution of the talc (D), are strictly specified. The resin composition can be molded into automobile bumpers which are good in appearance and paint coatability and sufficiently high in both rigidity and impact resistance.