Curable blends of fluoroelastomer and poly(ether-ketone-ketone)

Claim 2

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 a inherent visocity of greater than 0.4.

Claim 3

The composition of claim 1 wherein the cure site monomer is selected from the class consisting of vinylidene fluoride, trifluoroethylene, vinyl fluoride, CH 2 ═CHR f where R f is a perfluoroalkyl group containing from 1 to 5 carbon atoms, perfluorophenoxy substituted perfluoroalkylene vinyl ethers wherein the perfluoroalkylene group contains from 1 to 5 carbon atoms, NC(R' f --O) n CF═CF 2 where R' f is a perfluoroalkylene group of 2 to 3 carbon atoms and n is 1 to 4 fluoroolefins of 2 to 5 carbon atoms containing 1 or 2 bromo substituents or fluoroolefins of 2 to 5 carbon atoms containing 1 or 2 iodo substituents.

Claim 4

The composition of claim 1 wherein curing agents are present.

Claim 5

The composition of claim 3 wherein reinforcing fillers are present.

Claim 6

The composition of claim 4 wherein the fluoroelastomer has been cured.

Claim 7

Articles prepared from the composition of claim 5.

Claim 8

Process comprising: A. melt blending: (1) 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 (2) 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 a inherent visocity of greater than 0.4, at a temperature sufficient to melt A(2); B. cooling the melt blend produced in step A to below 100° C.; C. Admixing with the cooled melt blend produced in step B a chemical curing agent for the fluorinated organic comonomer of step A(1)(ii); and D. Curing the fluoroelastomer of step A.

Claim 9

Process comprising: A. melt blending: (1) 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 (2) 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 a inherent visocity of greater than 0.4, at a temperature sufficient to melt A(2); B. cooling the melt blend produced in step A to below 100° C.; C. Admixing with the cooled melt blend produced in step B a chemical curing agent for the fluorinated organic comonomer of step A(1)(ii); and D. Curing the fluoroelastomer of step A.