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:
Apr. 26, 2011
Filed:
Apr. 20, 2007
Mitsuru Maeda, Kitaibaraki, JP;
Takashi Enokida, Kitaibaraki, JP;
Keisuke Kokin, Kitaibaraki, JP;
Satoru Saito, Kitaibaraki, JP;
Jun Kanega, Kitaibaraki, JP;
Mitsuru Maeda, Kitaibaraki, JP;
Takashi Enokida, Kitaibaraki, JP;
Keisuke Kokin, Kitaibaraki, JP;
Satoru Saito, Kitaibaraki, JP;
Jun Kanega, Kitaibaraki, JP;
Unimatec Co., Ltd., Tokyo, JP;
Abstract
A fluorine-containing elastomer having a copolymer composition, which comprises (a) 50-85 mol. % of vinylidene fluoride, (b) 0-25 mol. % of tetrafluoroethylene, (c) 7-20 mol. % of perfluoro(methyl vinyl ether), (d) 2.5-15 mol. % of CF═CFO[CFCF(CF)O]nCF(n: 2-6), (e) 0.1-2 mol. % of CF═CFO[CFCF(CF)O]mCFCF(m: 2-6), and (f) 0.1-2 mol. % of RfX (Rf: an unsaturated fluorohydrocarbon group having 2-8 carbon atoms, which can contain at least one ether bond, X: bromine or iodine), can provide a fluorine-containing elastomer composition, which comprises 100 parts by weight of the fluorine-containing elastomer, 0.1-10 parts by weight of an organic peroxide, 0.1-10 parts by weight of a polyfunctional unsaturated compound, and at least 2 parts by weight of an acid acceptor. The composition can give vulcanizates having a distinguished elongation at break at high temperatures such as 100° C., and distinguished compression set characteristics at low temperatures such as 0° C.