Patent ID: 8318877

Claim:
A copolymer composition comprising monomers copolymerized in the following percentages by weight: (a) from about 20% to about 95% of a monomer, or mixture of monomers, of formula (I): C n F 2n+1 (CH 2 ) x [(CF 2 CF 2 ) y (CH 2 CH 2 ) z ] m -L-C(O)—C(R)═CH 2 (I) wherein R is H, Cl, F or CH 3 , L is O, S, NH, S—(CH 2 ) r O, S—(CH 2 ) r NH, OC(O)NH—CH 2 CH 2 O, NHC(O)NHCH 2 CH 2 O, S—(CH 2 ) r OC(O)NHCH 2 CH 2 O, or S(CH 2 ) r NHC(O)NHCH 2 CH 2 O, subscript n is an integer from 1 to about 6, subscript x is an integer from 1 to about 6, subscripts y, z and m are each independently 1, 2 or 3 or a mixture thereof, subscript r is from 1 to about 10, and wherein the total number of carbons in the fluorocarbon-hydrocarbon chain segment (formula (I) excluding L-C(O)—C(R)═CH2) ranges from about 8 to about 22, and (b) from about 5% to about 80% of at least one of: (i) an alkyl (meth)acrylate monomer having a linear, branched or cyclic alkyl group of from about 6 to about 18 carbons; or (II) a monomer of formula (II) (R 2 ) 2 N—R 3 —O—C(O)—C(R)═CH 2 (II) wherein R is H, Cl, F or CH 3 , each R 2 is independently a C 1 to C 4 alkyl; and R 3 is a divalent linear or branched C 1 to C 4 alkylene; and wherein the nitrogen is from about 40% to 100% salinized; or (iii) a mixture thereof.