| 摘要 |
A process of making a homopolymer of vinyl caprolactam (VLC), and a copolymer with dimethylaminopropyl methacrylamde (DMAPMA), optionally including with one or more polymerizable monomers (X), in the composition range, by weight, VCL 99 to 30 %, DMAPMA 1-70 % and monomer X 0-30%, respectively, by suspension polymerization in an aqueous/alcoholic solvent medium, without requiring a protective colloid, which comprises charging vinyl caprolactam in an aqueous/alcoholic solvent mixture, wherein the weight ratio of alcohol to total monomers is 1/6 to 3, and if present, forming a solution of DMAPMA and optional monomers in water, feeding the solution into the VCL charge at a predetermined rate, periodically adding initiator to the reaction mixture, and polymerizing at about 40 DEG to 130 DEG C, and, if desired, neutralizing the product, to form a polymer product at about 5 % to 40 % solids, homogeneously dispersed in the solvent.
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