Curable blends of fluoroelastomer and poly...

Details Curable blends of fluoroelastomer and poly... Curable blends of fluoroelastomer and poly...

C - Chemistry, Metallurgy

08

L

400/5403

C08L 27/18 (2006.01) C08L 61/16 (2006.01)

Patent

CA 1337307

Melt-blended composition comprising: a) about 100 parts of the fluoroelastomer consisting essentially of polymer repeat units of: i) 55 to 58 wt. % tetrafluoroethylene, ii) 0.4 to 2.0 wt. % of a fluorinated organic comonomer that contains curing sites, iii) 42 to 45 wt. % perfluoromethyl vinyl ether, and b) 5 to 50 parts of a copolymer having as polymer repeat units (oxy-p-phenyleneterephthaloyl-p-phenylene) and (oxy-p-phenyleneisophthaloyl-p-phenylene), the ratio of tere-isomer to iso-isomer being within the range 60:40 to 80:20, the copolymer having an inherent viscosity of greater than 0.4, the composition providing improved processing of the fluoroelastomer at temperatures below the melting temperature of component (b) and improved physical properties of the cured fluoroelastomer.

585107

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