An improved process for the preparation of water soluble polymer dispersion.

摘要

The present invention is particularly useful in preparing a water soluble polymer dispersion. According to one preferred embodiment of the invention, the dispersion is prepared by polymerizing a water soluble mixture of from about 15 to about 30% percent by weight of a cationic monomer represented by the following general formula (I): <CHEM> where R1 is either hydrogen or CH3; R2 and R3 are each an alkyl group having 1 to 3 carbon atoms; A1 is either an oxygen atom or NH; B1 is either an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group, and X1<(-)> is an anionic counterion, and/or a second cationic monomer represented by the following general formula (II): <CHEM> where R4 is either hydrogen or CH3; 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; A2 is either an oxygen atom or NH; B2 is either an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group and X2<(-)> is an anionic counterion; and (meth)acrylamide in an aqueous solution of from 17 to about 19 percent by weight of a polyvalent anionic salt.