Patent ID: 7304116

Claim:
A braided comb-shaped polymer thickening agent, copolymerized by monomer (A) and monomer (B), wherein the said monomer (A) is one or more water soluble unsaturated compound(s) with olefin chain, and the said monomer (B) is at least one compound with the following formula: in which, in the formula of the said monomer (B), A is COOH, OH, or SO 3 H; R 1 and R 2 are H or C 1 -C 12 alkyl respectively; R 3 and R 4 represent C 1 -C 12 alkyl, C 1 -C 12 alkylaryl, C 1 -C 12 alkyl ether or C 1 -C 12 alkyl ester group respectively, and the said monomer (A) is present in an amount of 70˜99.99% by mass of the total mass of monomer (A) and monomer (B).