| 摘要 |
New amphoteric water-soluble polymer dispersing solution comprises polymer fine particles with particle size of 100 nm or smaller. New amphoteric water-soluble polymer dispersing solution comprises polymer fine particles with particle size of 100 nm or smaller. The amphoteric water-soluble polymer dispersing solution is prepared by dispersion polymerization of a monomer mixture consisting of a monomer of formula (1), a monomer of formula (2), a monomer of formula (3) and (meth) acrylamide in a salt aqueous solution in the presence of the salt aqueous solution-soluble polymer dispersant. When the mol % of (1), (2), (3) and (meth)acrylamide are defined as a, b, c, d, respectively, they satisfy: a = 5-50; b = 5-50; c = 5-40; and d = 0-85. [Image] R 1> - R 6>1-3C alkyl or alkoxy or benzyl; X 1>, X 2>anion; R 7>methyl or carboxymethyl; R 8>H or carboxymethyl; A : SO 3, C 6H 4SO 3, CONHC(CH 3) 2CH 2SO 3 or COO; Y : cation. An independent claim is also included for dehydration of organic sludge by dissolving the present amphoteric water-soluble polymer dispersing solution in water, adding organic sludge to it, mixing and dehydrating. An inorganic coagulant is used, too. |
