Fluoroelastomer having improved compression set resistance

Details Fluoroelastomer having improved compression set resistance Fluoroelastomer having improved compression set resistance

C - Chemistry, Metallurgy

08

F

402/403, 400/651

C08F 214/18 (2006.01) C08F 226/06 (2006.01) C08F 259/08 (2006.01)

Patent

CA 1240437

TITLE FLUOROELASTOMER HAVING IMPROVED COMPRESSION SET RESISTANCE ABSTRACT OF THE DISCLOSURE A peroxide curable fluoroelastomer composition wherein the composition comprises a tetrapolymer whose interpolymerized units consist essentially of units derived from: (1) about 30-40 weight percent vinylidene fluoride, (2) about 30-40 weight percent of the fluorine-containing monomers hexafluoropropylene or pentafluoropropylene, (3) about 25-35 weight percent tetrafluoroethylene and (4) up to 3 mole percent of units, based upon the tetrapolymer, derived from a bromine-containing olefin, with the proviso that enough of such units are present to provide 0.05 weight percent bromine in the tetrapolymer, the units of the bromine-containing olefin are derived from a compound having the formula CX2=CX(CY2)n(CZ2)2Br where X is hydrogen or fluorine, Y is hydrogen, fluorine or chlorine, Z is fluorine or chlorine and n is 0-5 and said fluoroelastomer composition contains at least 1 part per hundred parts tetrapolymer of trimethyallylisocyanurate.

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