Patent ID: 7271214
Filing Date: 2007-09-18
Classification: C04B

Abstract:
1. A method of improving the slump properties of a cement admixture, the method comprising adding a dispersant composition to an admixture comprising cement and water, wherein the dispersant composition comprises a terpolymer comprised of a random combination of structural units (A), (B) and (C) remaining after polymerization, wherein: (A) is one or more monomers having functional groups selected from the group consisting of carboxylic acids, amido carboxylic acids, C1-C6 alkyl esters of carboxylic acids, C1-C6 alkyl ester of amido carboxylic acids, hydroxylated C1-C6 alkyl esters of carboxylic acids, hydroxylated C1-C6 alkyl esters of amido carboxylic acids and sulfonic acids; (B) is according to Formula (I):  where “R1” is (CH (C) is according to Formula (II):  where “R2” is H or a C1-C4 straight or branched alkyl chain; “R3” is CH