| abstract |
Addressed is the problem of providing a polycarboxylic copolymer having various capabilities, having particularly excellent dispersibility, and being useful for various purposes as a dispersion agent, cement admixture, and the like. Also addressed is the problem of providing a cement dispersion agent, a cement admixture, and a cement composition using the polycarboxylic copolymer. A polycarboxylic copolymer containing a constituent unit (I) derived from an unsaturated polyalkylene glycol monomer (a), and a constituent unit (II) derived from an unsaturated carboxylic monomer (b), the copolymer having a weight-average molecular weight (Mw) of 5000-25000, the copolymer containing a dimer formed by bonding two of the unsaturated polyalkylene glycol monomers (a), the area ratio of the dimer being at least 7%. |