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:
Nov. 08, 2005
Filed:
Sep. 19, 2001
Masao Otsuka, Settsu, JP;
Mitsuo Tsukamoto, Settsu, JP;
Mitsuhiro Otani, Settsu, JP;
Tatsuya Morikawa, Settsu, JP;
Hideya Saito, Settsu, JP;
Masao Otsuka, Settsu, JP;
Mitsuo Tsukamoto, Settsu, JP;
Mitsuhiro Otani, Settsu, JP;
Tatsuya Morikawa, Settsu, JP;
Hideya Saito, Settsu, JP;
Daikin Industries, LTD, Osaka, JP;
Abstract
The present invention provides an ethylene-hexafluoropropylene copolymer which is suitable as a hose or seal for engine oil of an automobile and has sufficient amine resistance, while maintaining heat resistance, oil resistance and chemical resistance close to that of conventional fluorine rubber. The ethylene-hexafluoropropylene copolymer comprises 35 to 60% by mole of ethylene structural unit, 25 to 50% by mole of hexafluoropropylene structural unit and 0 to 15% by mole of structural unit derived from a monomer copolymerizable therewith and has a fluorine content of at least 60% by weight and number average molecular weight of 3,000 to 500,000.