METHOD FOR PRODUCTION OF CEMENT DISPERSANT AND POLYCARBOXYLIC ACID TYPE POLYMER FOR CEMENT DISPERSANT

摘要

The efficiency of production of the polycarboxylic acid type cement dispersant is exalted. Photo-polymerization is adopted in the production of the polycarboxylic acid type cement dispersant by polymerizing at least one kind of monomer represented by the chemical formula (1) and at least one kind of monomer represented by the chemical formula (2). A polymer composition having a small solvent content is obtained by causing the polymerization reaction to proceed under the condition of containing the monomers at a high concentration. Specifically, this invention is directed toward a method for producing a powdered polycarboxylic acid type cement dispersant, which method comprises a step of polymerizing the monomers under the condition of containing the monomers at a concentration of 50 - 100 mass% based on the total mss of the monomers and the solvent, a step of cooling the formed polymer thereby solidifying the polymer, and a step of pulverizing the solidified polymer.