Patent ID: 8623979

Claim:
A dispersant composition for improving the slump properties of a cement admixture, the dispersant composition comprising 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 2 —CH 2 —O)n or (CH 2 —CH(CH 3 )—O)n or a mixture of both and “n” is an integer ranging from about 1 to about 100; and “M” is sodium, potassium, calcium, ammonium or an organic amine; and (C) is according to Formula (II): where “R2” is H or a C1-C4 straight or branched alkyl chain; “R3” is CH 2 or C═O; “R4” is (CH 2 -CH 2 —O)m or (CH 2 —CH(CH 3 )—O)m or a mixture of both and “m” is an integer ranging from about 1 to about 150; and “R5” is H or a C1-C18 straight or branched alkyl chain.