Patent ID: 8519029
Filing Date: 2013-08-27
Classification: C04B,C08F,Y10S

Abstract:
1. A non-ionic polyether-polyester copolymer for extending workability to a cementitious mixture containing hydraulic cement and water, wherein the copolymer comprises residues of at least the following monomers: Component A comprising at least one ethylenically unsaturated carboxylic acid ester monomer comprising a moiety hydrolysable in the cementitious mixture, wherein the hydrolyzed monomer residue comprises an active binding site for a component of the cementitious mixture; and, at least one of Component B comprising at least one ethylenically unsaturated alkenyl ether monomer comprising at least one C at least one of Component C comprising at least one ethylenically unsaturated alkenyl ether monomer comprising at least one C wherein the molar ratio of Component A to the sum of the molar ratios of Component B and Component C is about 1:1 to about 10:1.