| 摘要 |
Compounds having the formula <FORM:1036099/C3/1> in which R1 is hydrogen or CH3 and R2 is chlorine, C6H5, OOC.R3 or COOR4, R3 being hydrogen or a monovalent saturated aliphatic hydrocarbon radical containing 1-18 carbon atoms and R4 being a monovalent saturated aliphatic hydrocarbon radical containing 1-8 carbon atoms are polymerized by a free radical method in aqueous phase in the presence of a polymer or copolymer of an open chain N-vinyl-amide of formula <FORM:1036099/C3/2> in which R5 and R6 each represent hydrogen or a hydrocarbon radical containing 1-20 carbon atoms. The amount of polyvinyl amide dispersing agent may vary from 0.1 to 50% by weight of the water used and the polymeric products obtained are thus either polymer dispersions or graft copolymers. Exemplified monomers polymerized are vinyl acetate, vinyl acetate with dibutyl maleate, styrene, methyl methacrylate, ethyl acrylate, ethyl hexyl acrylate and ethyl hexyl acrylate with vinyl chloride in the presence of di-n-hexyl-azelate plasticizer. Other conventional surface-active agents and catalysts are exemplified. |
