Patent ID: 6939935
Filing Date: 2005-09-06
Classification: C08F

Abstract:
1. An alkali metal salt of a copolymer of a maleic ester and a comonomer selected from the group consisting of acrylic acid, methacrylic acid and mixtures thereof, wherein the maleic ester comprises an esterification product of a component selected from the group consisting of maleic acid and maleic anhydride with an alkyl polyalkylene glycol, wherein the alkyl polyalkylene glycol corresponds to the general formula (I): wherein R 1 represents an alkyl group having from 1 to 4 carbon atoms, each R 2 represents a hydrogen or a methyl group and n represents a number of from 1 to 40; and wherein the salt of the copolymer has an average molecular weight of from 1,000 to 5,000 daltons.