| 摘要 |
PROBLEM TO BE SOLVED: To provide an amphoteric aqueous water-soluble polymer solution in which a sulfonic acid group-rich sulfonic acid group-containing amphoteric water-soluble polymer is dissolved in water. SOLUTION: The amphoteric aqueous water-soluble polymer solution is such that a sulfonic acid group-containing amphoteric water-soluble polymer and an inorganic salt are dissolved in water; wherein the sulfonic acid group-containing amphoteric water-soluble polymer is a copolymer comprising 5-90 mol% of specific water-soluble cationic monomer units, 5-50 mol% of sulfonic acid group-containing water-soluble anionic monomer units; and 5-70 mol% of monomer units other than the water-soluble cationic monomer units and the sulfonic acid group-containing water-soluble anionic monomer units. COPYRIGHT: (C)2010,JPO&INPIT |
