Patent ID: 8183325

Claim:
A copolymer containing perfluorocyclobutane groups in the polymer backbone and comprising at least two of the following units; (a) an oxyalkylene unit of the formula wherein R 2 and R 3 are independently hydrogen, a straight or branched C 1 -C 6 alkyl group, a C 3 -C 30 cycloalkyl group, a C 5 -C 30 aryl group, a straight or branched C 1 -C 6 fluoroalkyl group, a C 3 -C 30 fluorocycloalkyl group, a C 5 -C 30 fluoroaryl group, an ether group, a C 1 -C 20 ester group, an amide group, an amine group, fluorine, a vinyl group, or a hydroxyl group, m is 1 to about 10 and n is 1 to about 100,000; (b) a polysiloxane unit of the formula wherein R 4 and R 5 are independently hydrogen, a straight or branched C 1 -C 6 alkyl group, a C 3 -C 30 cycloalkyl group, a C 5 -C 30 aryl group, a straight or branched C 1 -C 6 fluoroalkyl group, a C 3 -C 30 fluorocycloalkyl group, a C 5 -C 30 fluoroaryl group, an ether group, a C 1 -C 20 ester group, C 1 -C 6 alkoxy group, an amide group, an amine group, fluorine, a vinyl group, or a hydroxyl group and n is 1 to about 100,000; and (c) a perfluorocyclobutane unit of the formula wherein X′ is independently a bond, an oxygen atom, a sulfur atom, a carboxylic or thiocarboxylic ester group, a sulfone, a sulfoxide, perfluoroalkylene, perfluoroalkylene ether, alkylene, acetylene, a phosphine, a carbonyl or thiocarbonyl group; seleno; telluro; nitrido; a silanediyl group, a trisilanediyl group, a tetrasilanetetrayl group, a siloxanediyl group, a disiloxanediyl group, a trisiloxyl group, a trisilazanyl group, a silythio group, or a boranediyl group, R 6 independently represents one or more inertly substituted groups and n is 1 to about 100,000.