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:
Feb. 05, 2013
Filed:
Apr. 16, 2008
Tsuyoshi Noguchi, Osaka, JP;
Jiazhong Luo, Lansdale, PA (US);
Tatsuya Morikawa, Osaka, JP;
Hirokazu Komori, Osaka, JP;
Takafumi Yamato, Osaka, JP;
Meiten Koh, Osaka, JP;
Tsuyoshi Noguchi, Osaka, JP;
Jiazhong Luo, Lansdale, PA (US);
Tatsuya Morikawa, Osaka, JP;
Hirokazu Komori, Osaka, JP;
Takafumi Yamato, Osaka, JP;
Meiten Koh, Osaka, JP;
Greene, Tweed of Delaware, Inc., Wilmington, DE (US);
Daikin Industries, Ltd., Osaka, JP;
Abstract
The present invention includes crosslinked perfluoroelastomeric compositions and molded articles formed from a cross-linkable perfluoroelastomeric composition having a first curable perfluoropolymer having a cure site monomer and a second perfluoropolymer having a cure site monomer. The molar ratio of the tetrafluoroethylene monomer to perfluoroalkylvinyl ether in one perfluoropolymer is about 0 to 100 to about 65 to 35 in the perfluoropolymer. The molar ratio of the tetrafluoroethylene monomer to the perfluoroalkylvinyl ether monomer in the second polymer is about 65:35 to about 95:5 in the second perfluoropolymer. The composition further includes a curative. One fluorine-containing elastomer composition herein, having a short crosslinking time, has perfluoroelastomers (A) having a tetrafluoroethylene unit, a perfluoralkylvinyl ether unit (a) and a monomer unit (b) having at least one kind selected from the group consisting of a nitrile group, a carboxyl group and an alkoxycarbonyl group, wherein the composition has two or more kinds of perfluoroelastomers (A) having differing contents of perfluoroalkylvinyl ether unit (a).