METHOD FOR PRODUCTION OF WATER-SOLUBLE POROUS POLYMER AND WATER-SOLUBLE POROUS POLYMER
申请人:NIPPON SHOKUBAI CO., LTD.
公开号:EP1646662A1
公开(公告)日:2006-04-19
[EN] METHOD FOR PRODUCTION OF WATER-SOLUBLE POROUS POLYMER AND WATER-SOLUBLE POROUS POLYMER<br/>[FR] PROCEDE DE PRODUCTION DE POLYMERE POREUX HYDROSOLUBLE, ET POLYMERE POREUX HYDROSOLUBLE
申请人:NIPPON CATALYTIC CHEM IND
公开号:WO2005007713A1
公开(公告)日:2005-01-27
A method for efficient production of a water-soluble porous polymer and a water-soluble porous polymer excelling in solubility in water are provided. A method for the production of the polymer is characterized by the fact that an aqueous monomer solution containing an ethylenically unsaturated monomer is polymerized while it is containing bubbles therein. The method can simplify the drying and crushing steps and the water-soluble porous polymer consequently obtained excels in solubility in water.
[EN] METHOD FOR PRODUCTION OF CEMENT DISPERSANT AND POLYCARBOXYLIC ACID TYPE POLYMER FOR CEMENT DISPERSANT<br/>[FR] MÉTHODE POUR PRODUIRE UN DISPERSANT DE CIMENT ET POLYMÈRE DE TYPE ACIDE DE POLYCARBONATE POUR DISPERSANT DE CIMENT
申请人:NIPPON CATALYTIC CHEM IND
公开号:WO2006006712A1
公开(公告)日:2006-01-19
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.