Patent ID: 8362106
Filing Date: 2013-01-29
Classification: C08F,C08L,C09D

Abstract:
1. A linear block copolymer comprising at least one hydrophilic block and at least one hydrophobic block, wherein: a. the hydrophobic block comprises at least 80 wt % of polymerized ethylenically unsaturated, nonacid-functional monomers, said percentage based on the weight of the hydrophobic block; b. the hydrophilic block comprises at least 20 wt % of polymerized ethylenically-unsaturated acid-functional monomers selected from the group consisting of acrylic acid, methacrylic acid, acrylamidomethylpropane sulfonic acid, itaconic acid, maleic acid and styrene sulfonic acid, said percentage based on the weight of the hydrophilic block; and c. the hydrophilic block further comprises at least one ethylenically-unsaturated decarboxylating acid-functional monomer having a formula corresponding to Formula 1 wherein L is a divalent organic linking group which can be a saturated or unsaturated hydrocarbyl group, optionally containing heteroatoms; X is an electron-withdrawing group selected from the group consisting of —O—, —S—, —Se—, —NR—, —SO m =0 or 1; n =0 or 1; R is H or a monovalent organic group; R R R Y is an electron-withdrawing group selected from the group consisting of phenyl, nitro, halo, cyano, carboalkoxy, —C(═O)NH(alkyl),—C(=O)N(alkyl) M is H, Li, K, Cs, NH where r =0, 1, 2, 3, or 4; and each Z is independently selected from the group consisting of alkyl, aryl, aralkyl and alkaryl; with the proviso that when n=0, R