Verfahren zur Herstellung von polymeren Polyvinylchloridmassen von verbesserter Schlagfestigkeit

A process for the preparation of a vinyl chloride polymer composition, which comprises (a) dissolving an oil-soluble polyalkylene oxide such as polypropylene oxide, or a copolymer of propylene oxide in the 1-butene oxide or epichlorohydrin, in a monomeric mixture consisting of 99.5 - 90 parts of a vinyl chloride monomer and 0.5 - 10 parts of a comonomer such as ethylene, propylene or 1-butene, the amount of said oil-soluble polyalkylene oxide being 0.5 - 5 percent by weight based on the monomeric mixture, (b) emulsifying or suspending the resulting solution in water, (c) polymerizing the emulsified or suspended solution and (d) recovering the resulting polymer composition. The vinyl chloride polymer composition obtained has very high impact strength even at low temperatures, and same good transparency and other physical properties as polyvinyl chloride.