| 摘要 |
A process for producing a cationic polymer, which comprises polymerizing a vinyl monomer represented by the general formula, <IMAGE> (I) wherein R1 represents -H or -CH3, R2 represents -CH2CH2- or <IMAGE> R3 and R4 represent -CH3 or -CH2CH3, R5 represents -CnH2n+1, in which n is an integer of 0 to 4, <IMAGE> or -CH2COOH, and X- represents Cl-, CH3SO4-, CH3SO3-, or 1/2 SO4--, either alone or in admixture with up to 25% by weight, based on the total weight of the monomers, of other copolymerizable vinyl monomers in the presence of 7 to 18% by weight, based on the weight of the polymerization system, of water and, if necessary, choline chloride by use of a polymerization initiator and elevating the temperature, in the final polymerization stage, to 110 DEG to 150 DEG C. to complete the polymerization, thereby obtaining the water-soluble cationic polymer in the form of a lump. The polymer in the lump form thus obtained may be easily ground with a high efficiency at room temperature. The powdered polymer is excellent as a cationic flocculant.
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