Patent ID: 7807766

Claim:
A water-soluble polymer for use in cleaning compositions comprising at least 4 monomers of the following formulae: a) H 2 C═CR 1 —CO—NH—R 2 —N + R 3 R 4 R 5 X − wherein R 1 represents hydrogen or C1-C4 alkyl; R 2 represents linear or branched C1-C12 alkylene; R 3 , R 4 and R 5 , independently of one another, each represent hydrogen, C1-C18 alkyl or phenyl; and X − represents an anion selected from the group consisting of halide, sulfate, alkylsulfate, hydroxide, phosphate, acetate and formate; b) 40-75% by weight of N-isopropylacrylamide, based on the water-soluble polymer; c) acrylic and/or methacrylic acid and/or salts thereof; and d) at least one monomer selected from the group consisting of (1) C 3 -C 6 singly ethylenically unsaturated carboxylic and dicarboxylic acids, half-esters thereof, and salts thereof; and (2) H 2 C═CR—CO—NH—CR′R″R′″—SO 3 H, and salts thereof; wherein R, R′, R″, and R′″ independently represent hydrogen, C1-C4 alkyl or C1-C4 alkylene, wherein monomer c) is present in the water-soluble polymer at a maximum of about 25 wt % based on the total weight of the water-soluble polymer, and wherein cleaning compositions comprising the water-soluble polymer show improved luster retention and rinsing properties.