| 摘要 |
Provided is a water-in-oil type emulsion that has a high storage stability and exhibits an excellent performance as a flocculation treatment agent, wherein a vinylamine polymer capable of expressing specific effects as a papermaking agent or a flocculation agent is formulated into the water-in-oil type emulsion having a number of practical advantages. The flocculation treatment agent according to the present invention comprises a water-in-oil type emulsion of a water soluble polymer, said water-in-oil type emulsion being prepared by hydrolyzing, in the presence of an acid or a base, a water-in-oil type emulsion of an aqueous solution of an N-vinylcarboxylic amide polymer in which a polyoxyalkylene alkyl ether coexists. It is preferred that the polyoxyalkylene alkyl ether is added before the hydrolysis reaction. |
