Patent ID: 9228041
Filing Date: 2016-01-05
CPC Classification: A61K,A61Q,C07C,C08F,C08L,C09D,C09K,C11D,E21B

Claim Text:
1. A HASE pH responsive copolymer of unsaturated copolymerizable monomers which is a water soluble thickener, said unsaturated copolymerizable monomers consisting of, based on total weight of monomers: A. about 10-70 weight percent first acidic monomer selected from at least one member of the group consisting of mono-[2-(methacryloyloxy)ethyl]phthalate having the structure A.I: and mono-[2-(Methacryloyloxy)ethyl hexahydro]phthalate having the structure A.II B. about 0-45 weight percent of at least one C3-C8 alpha beta-ethylenically unsaturated second acidic monomer; C. about 15-70 weight percent of at least one nonionic, copolymerizable C2-C12 alpha, beta-ethylenically unsaturated monomer; and D. about 0.05 to 30 weight percent of at least one nonionic ethylenically unsaturated hydrophobic monomer, wherein the hydrophobic monomer comprises one or more compounds according to structure (D.XXV): wherein R R p is 2, q is 2 to 5, r is an integer of from 1 to about 80, s is 0 t is 1.