| 摘要 |
PROBLEM TO BE SOLVED: To provide a powdery cement dispersant having good workability and an excellent cement water reducing property and to provide its manufacturing method. SOLUTION: In the powdery cement dispersant containing a polycarboxylic acid-based copolymer (I), the polycarboxylic acid-based copolymer (I) has at least a part (A) represented by general formula (1) and a part (B) represented by general formula (2). COPYRIGHT: (C)2007,JPO&INPIT
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