Patent ID: 7060416
Filing Date: 2006-06-13
Classification: B41C,B41M,C08F,Y10S

Abstract:
1. A copolymer comprising, in polymerized form: (a) about 1 wt % to about 30 wt % of N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, or a mixture thereof; (b) about 1 wt % to about 30 wt % of acrylamide, methacrylamide, or a mixture thereof; (c) about 20 wt % to about 75 wt % of acrylonitrile, methacrylonitrile, or a mixture thereof; and (d) a total of about 20 wt % to about 75 wt % of one or more monomers selected from the group consisting of monomers of the structure: in which: X is —[C(CH Y is o-, m-, or p-—[C Z is —[C(O)O]—, —[C(O)NH]—, or o-, m-, or p- [—C R is hydrogen or C R′ is —OC(O)—OR″, —OC(O)—Ar, or —OSO R″ is C Ar is C each T is independently selected from the group consisting of C n′ is an integer from 0 to 5; and in which the copolymer is soluble in alkaline solutions having a pH greater than at least about 11.