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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.:

US 11084911 B1

PDFFull Text
Date of Patent:
Aug. 10, 2021

Filed:

Mar. 18, 2019

Method of producing sealing member for fuel cell and rubber composition for molding

Applicant:

Toyoda Gosei Co., Ltd., Kiyosu, JP;

Inventors:

Akishige Seo, Kiyosu, JP;

Mitsue Tanaka, Kiyosu, JP;

Kenichiro Kaneko, Kiyosu, JP;

Yoshiaki Mase, Kiyosu, JP;

Hidekazu Kurimoto, Kiyosu, JP;

Assignee:

TOYODA GOSEI CO., LTD., Aichi-pref., JP;

Attorney:

Posz Law Group, PLC

Primary Examiner:

Robert C Boyle

Int. Cl.
CPC ...
C08F 210/18 (2006.01); C08J 5/12 (2006.01); B29C 45/14 (2006.01); H01M 8/0284 (2016.01); C08J 3/24 (2006.01); B29K 105/00 (2006.01); B29K 623/00 (2006.01); B29L 31/26 (2006.01); B29K 9/00 (2006.01);
U.S. Cl.
CPC ...
C08J 5/121 (2013.01); B29C 45/14336 (2013.01); C08F 210/18 (2013.01); C08J 3/245 (2013.01); H01M 8/0284 (2013.01); B29K 2009/00 (2013.01); B29K 2105/0085 (2013.01); B29K 2623/12 (2013.01); B29L 2031/26 (2013.01); C08F 2810/20 (2013.01); C08J 2323/12 (2013.01); C08J 2323/26 (2013.01);
Abstract

A method of producing a sealing member for a fuel cell includes: setting a base material made of a modified polypropylene in a mold; bringing a hydrosilicone crosslinked ethylene/α-olefin/non-conjugated diene copolymer into contact with the base material and performing molding in the mold; and vulcanizing the hydrosilicone crosslinked ethylene/α-olefin/non-conjugated diene copolymer and at the same time, bonding the hydrosilicone crosslinked ethylene/α-olefin/non-conjugated diene copolymer and the base material by vulcanization, in the mold with a molding temperature set to a temperature that is higher than a vulcanization start temperature of the hydrosilicone crosslinked ethylene/α-olefin/non-conjugated diene copolymer and lower than a melting point of the modified polypropylene.

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