Patent ID: 7638563
Filing Date: 2009-12-29
Classification: C04B,C08F

Abstract:
1. A polycarboxylic acid concrete admixture comprising a polycarboxylic acid polymer containing a polyalkylene glycol in the side chain, wherein said polycarboxylic acid polymer is formed by polymerizing monomer components comprising 22 to 55 mole % of at least one alkyl (meth)acrylate monomer selected from the group consisting of methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate and butyl (meth)acrylate, 15 to 40 mole % of a polyalkylene glycol unsaturated monomer represented by the following formula (1); wherein R has a weight average molecular weight of 18000 or less.