| 摘要 |
PROBLEM TO BE SOLVED: To provide a water-soluble polymer that is high in molecular weight and has excellent coagulation performance.SOLUTION: A water-soluble polymer (A) 100 pts.wt. is crosslinked with an epoxy crosslinking agent (B) 1-10 pts.wt., where the water-soluble polymer has a specific structure obtained by subjecting a copolymer comprising acrylamide and acrylonitrile to Hofmann reaction, and thereafter, subjecting the reactant to neutralization and heating.SELECTED DRAWING: None |
