Procedure for preparing modified compositions of polivinyl halide. (Machine-translation by Google Translate, not legally binding)

摘要

Process for preparing modified polyvinyl halide compositions, comprising from 70 to 99 weight percent of a polymer, comprising more than 50 weight percent of vinyl halide units, and from 1.0 to 30 weight percent in weight of a sequentially produced heterogeneous polymer, comprising 1 to 30 percent by weight of (a) a relatively soft first stage containing 1.5 to 100 percent by weight of C1-C18 alkyl acrylate units having said alkyl group of 1 to 18 carbon atoms, 0 to 98.5 weight percent units of at least one other ethylenically unsaturated monomer and copolymerizable therewith and 0 to 10 weight percent of a polyfunctional crosslinkable copolymerizable monomer, said first stage having a glass transition temperature not exceeding 60ºC, and 99 to 70 weight percent of (B) a relatively hard and substantially thermoplastic final stage containing units of at least one monoethylenically unsaturated polymerizable monomer, the final stage alone having a glass transition temperature higher than that of the first stage and of at least 25ºC, characterized in that it comprises intimately mixing an appropriate polymer of vinyl halide and an appropriate heterogeneous polymer produced sequentially . (Machine-translation by Google Translate, not legally binding)