초록 ▼

The present invention relates to the preparation of a dispersion wherein a copolymer comprising an acrylic monomer containing a dialkylbenzylammonium group is dispersed in an aqueous solution of a salt as fine particle. Two cationic polymers are used in the polymerization of the above monomer in the

The present invention relates to the preparation of a dispersion wherein a copolymer comprising an acrylic monomer containing a dialkylbenzylammonium group is dispersed in an aqueous solution of a salt as fine particle. Two cationic polymers are used in the polymerization of the above monomer in the aqueous solution of a salt. One of the cationic polymers is a (co)polymer comprising an acrylic monomer containing a trialkylammonium group which is soluble both in the aqueous solution of a salt and in water, while the other thereof is a copolymer comprising an acrylic monomer containing a dialkylbenzylammonium group which is soluble in water, but insoluble in the aqueous solution of a salt. The above aqueous solution of a salt is an aqueous solution of a polyvalent anion salt such as sulfate or phosphate. A dispersion of a water-soluble cationic polymer can be prepared by dissolving the above monomer in the aqueous solution and carrying out the polymerization in the presence of the above two polymers.

대표청구항 ▼

A process for preparing a dispersion of a water-soluble cationic polymer that is easily flowable and easily soluble in spite of its high molecular weight comprising: polymerizing a water-soluble monomer mixture containing at least 5 mole % of a cationic monomer represented by general formula (I) in

A process for preparing a dispersion of a water-soluble cationic polymer that is easily flowable and easily soluble in spite of its high molecular weight comprising: polymerizing a water-soluble monomer mixture containing at least 5 mole % of a cationic monomer represented by general formula (I) in an aqueous solution of a polyvalent anion salt, wherein said polymerization is carried out in the presence of: (1) a water-soluble cationic polymer which is insoluble in said aqueous solution of a polyvalent anion salt; and (2) a water-soluble cationic polymer which is soluble in said aqueous solution of a polyvalent anion salt, said water-soluble cationic polymer insoluble in said aqueous solution of polyvalent anion salt contains at least 5 mole % of cationic monomer units represented by following general formula (I) and said water-soluble cationic polymer soluble in said aqueous solution of a polyvalent anion salt contains at least 20 mole % of cationic monomer units represented by the following general formula (II): [Figure] (I) [Figure] (II) wherein R1 and R4 are each H or CH3; R2, R3, R5 and R6 are each an alkyl group having 1 to 2 carbon atoms; R7 is a hydrogen atom or an alkyl group having 1 to 2 carbon atoms; A1 and A2 are each an oxygen atom or NH; B1 and B2 are each to 4 carbon atoms or a hydroxypropylene group and X1-and X2-are each a counter anion.