Patent ID: 9127102
Filing Date: 2015-09-08
Classification: C08F,C08L,C09D

Abstract:
1. A rheology modifier a copolymer of formula (I) wherein a, b, c, d and e represent the percentage by weight that each repeating unit monomer is contained within the copolymer, and being: A is a macromonomer pre-formed by catalytic chain transfer comprising at one end a polymerizable group reactive during polymerization with at least one of B, C, D and E monomers, the reactive group at the one end of the macromonomer being attached to a chain formed of a homo- or co-polymer of C B is acrylic or methacrylic acid or a salt thereof; C is a C D is an associative monomer of formula (II) wherein each R R T is —CH Ar is divalent aryl; E is H or methyl; z is 0 or 1; k is an integer in the range of 0 to 30; and m is 0 or 1; with the proviso that when k is 0, m is 0, and when k is in the range of 1 to 30; m is 1; (R Y is —R R E is optionally present representing a cross linking monomer for introducing branching and controlling molecular weight, the cross linking monomer comprising polyfunctional units carrying multiple reactive functionalization groups selected from the group consisting of vinyl, allylic and functional mixtures thereof, the groups A, B, C, D and E being covalently bonded one to another in a random, a block or a cross-linked copolymer format.