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:
Jun. 19, 2007
Filed:
Apr. 22, 2004
Yoshiyuki Odagawa, Tokyo, JP;
Fumio Ikeda, Tokyo, JP;
Nobuyoshi Emori, Tokyo, JP;
Hideyuki Fujiwara, Aichi, JP;
Takashi Mizushima, Aichi, JP;
Takahiro Iwata, Aichi, JP;
Yoshiyuki Odagawa, Tokyo, JP;
Fumio Ikeda, Tokyo, JP;
Nobuyoshi Emori, Tokyo, JP;
Hideyuki Fujiwara, Aichi, JP;
Takashi Mizushima, Aichi, JP;
Takahiro Iwata, Aichi, JP;
Zeon Corporation, Tokyo, JP;
Toyoda Gosei Co., Ltd., Aichi-ken, JP;
Abstract
A rubber composition includes α,β-ethylenically unsaturated nitrile-conjugated diene copolymer rubber (A), α,β-ethylenically unsaturated nitrile-conjugated diene copolymer rubber (B), ethylene-α-olefin copolymer rubber (C), and a graft copolymer (D). The graft copolymer (D) is obtained by performing graft copolymerization on a mixture of an aromatic vinyl compound and an α,β-ethylenically unsaturated nitrite monomer with an ethylene-propylene-unconjugated copolymer. A content of structure units of the ethylene-propylene-unconjugated copolymer is 20 to 70 wt %, a ratio of the graft copolymer (D) with respect to 100 parts by weight in total of said rubber (A), rubber (B) and rubber (C) is 1 to 30 parts by weight. A composition ratio of the rubber (A), rubber (B) and rubber (C) is rubber (A): 20 to 79 wt %, rubber (B): 1 to 30 wt %, and rubber (C): 20 to 50 wt %.