Being applications of the water soluble polymer of the ester which consists of the applications null acrylic Acid

摘要

PROBLEM TO BE SOLVED: To provide a water-soluble polymer useful as an additive to cementitious compositions.;SOLUTION: The water-soluble polymer is a water-soluble polymer of an ester made from acrylic acid and an alkylpolyalkylene glycol which can be obtained by azeotropic esterification of a mixture of acrylic acid and the alkylpolyalkylene glycol (in a molar ratio of 2 to 3:1) in the presence of at least 85 mass%, based on the alkylpolyalkylene glycol, of an organic solvent which forms an azeotrope with water, followed by free-radical polymerization, in an aqueous medium, of the mixture obtained during the esterification while azeotropically distilling off the organic solvent from the reaction mixture during this polymerization and returning the water removed by distillation to the reaction mixture or replacing the water by a feed of fresh water.;COPYRIGHT: (C)2003,JPO