| 摘要 |
PROBLEM TO BE SOLVED: To provide a dispersing agent for alumina cement which is capable of imparting high fluidity, adequate pot life, strength exhibiting property, and high strength to an alumina cement blended substance. SOLUTION: The dispersing agent for alumina cement imparting excellent fluidity, adequate pot life, strength exhibiting property and high strength to the blended substance having the alumina cement as a hardener can be obtained when a copolymer having a specific range of an average number of addition mols of an alkylene oxide group in a side chain is used in a copolymer of a polyalkylene glycol alkenyl ether and a maleic anhydride and/or its hydrolysis product. |
