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US 8,785,581 B2Granted
Fluoroelastomer, curable composition and cured rubber article
AssigneeDaikin Industries, Ltd.
InventorsShigeru Morita, Masanori Kitaichi, Shouji Fukuoka, Daisuke Ota
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Abstract
A noncrystalline fluoroelastomer which is a copolymer consisting essentially of vinylidene fluoride and a fluoromonomer represented by the general formula (1): CH2═CFRf (1) wherein Rf is a straight or branched fluoroalkyl group containing 1 to 12 carbon atoms, and has a vinylidene fluoride units/fluoromonomer units mol ratio of 78/22 to 22/78 and a glass transition temperature of not higher than 25° C.
Claims5
A noncrystalline fluoroelastomer which is a copolymer
- consisting essentially of vinylidene fluoride, a fluoromonomer represented by the general formula (I):
- CH2═CFRf (1)
- wherein Rf is a straight or branched fluoroalkyl group containing 1 to 12 carbon atoms, and another monomer copolymerizable with both vinylidene fluoride and said fluoromonomer of formula (I), and
- has a vinylidene fluoride units/fluoromonomer units mol ratio of 85/15 to 20/80,
- contains the other monomer units in the amount of 1 to 40 mol percent of all the monomer units and
- has a glass transition temperature of not higher than 25° C.
3 more elements
Dependencies are inferred from the claim text.