Allylamine copolymers having phosphonic, carboxylic or sulfonic groups and N-oxide derivatives thereof

Abstract

This invention is directed to certain novel N-functionalized polyallylamines having recurring units represented by the formula: ##STR1## wherein A, B, C and D are independently selected from the group consisting of hydrogen, CH.sub.2 PO.sub.3 H.sub.2, (CH.sub.2).sub.n COOH, (CH.sub.2).sub.m SO.sub.3 H and water-soluble salts thereof, wherein n=1 to 4, m=1 to 4, X is 1 to 99 mol %, Y is 1 to 99 mol % and X+Y=100 and with the proviso that when A is hydrogen, B is (CH.sub.2).sub.n COOH, or (CH.sub.2).sub.m SO.sub.3 H and at least one of C and D is CH.sub.2 PO.sub.3 H.sub.2 or (CH.sub.2).sub.m SO.sub.3 H, when A is (CH.sub.2).sub.n COOH, at least one of B, C and D is CH.sub.2 PO.sub.3 H.sub.2 or (CH.sub.2).sub.m SO.sub.3 H and when A is CH.sub.2 PO.sub.3 H.sub.2, at least one of B, C or D is (CH.sub.2).sub.n COOH or (CH.sub.2).sub.m SO.sub.3 H. The compositions of this invention are useful in water treatment to inhibit or remove scale deposits.

Dependencies are inferred from the claim text.