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. 30, 2002
Filed:
Dec. 20, 2000
Katsumi Abe, Chigasaki, JP;
Haruyoshi Tatsu, Hitachi, JP;
Nippon Mektron, Ltd., Tokyo, JP;
Abstract
A fluoroelastomer comprising constituent units derived from vinylidene fluoride (a) and constituent units derived from perfluoro(methoxypropyl vinyl ether) (b), optionally together with constituent units derived from tetrafluoroethylene (c) and/or constituent units derived from a perfluoroalkyl vinyl ether (d), wherein the constituent units (a) are contained in an amount of 65 to 85 mol %, the constituent units (b) in an amount of 0.5 to 30 mol %, the constituent units (c) in an amount of 0 to 10 mol % and the constituent units (d) in an amount of 0 to 25 mol %. The fluoroelastomer can be produced by a process comprising copolymerizing vinylidene fluoride and perfluoro(methoxypropyl vinyl ether), optionally together with tetrafluoroethylene and/or a perfluoroalkyl vinyl ether, in the presence of an iodated brominated compound represented by the general formula RBr I [I]. Further, there is provided a crosslinkable composition comprising the above fluoroelastomer and a peroxide crosslinking agent. Still further, there is provided a curing product produced by curing the above crosslinkable composition, and having excellent resistances to heat, cold and solvents.