Patent ID: 6384155
Filing Date: 2002-05-07
Classification: C08F

Abstract:
Process to polymerize vinyl chloride monomer and optional further monomers using one or more organic peroxides, with at least part of the peroxide being dosed to the polymerization mixture at the reaction temperature, characterized in that essentially all of the organic peroxide used in the polymerization process has a half-life of from 0.05 hour to 1.0 hour at the polymerization temperature ranging from 35Â° C. to 87Â° C. and that said peroxide is dosed, continuously or discontinuously, over a period of 0.17 hours or longer, with the proviso that the polymerization is not the copolymerization of vinyl chloride monomer and propylene using &agr;-cumyl peroxyneodecanoate as the initiator.