| abstract |
To provide a polymer having a polyalkylene glycol chain and having a very narrow molecular weight distribution different from that of a conventional copolymer, a polymer having a specific parameter value, and a dispersant for inorganic powder, particularly a cement admixture having excellent dispersibility using the polymer. The polymer of this invention is a polymer (P) containing the structural unit derived from a polyoxyalkylene chain, and satisfy | fills the range of PD value defined by following formula (1).n n n 1 <PD <MD (1)n n n However, PD = Mw / Mn, MD = G (n) × Mw + H (n). |