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    • 7. 发明授权
    • Core-shell vinyl halide polymers having a long-chain vinyl ether containing shell
    • 具有长链含乙烯壳的壳聚乙烯醇聚合物
    • US3673282A
    • 1972-06-27
    • US3673282D
    • 1970-05-15
    • MONSANTO CO
    • BAER MASSIMO
    • C08F259/00C08F15/06C08F15/26
    • C08F259/00Y10S525/902C08F214/00
    • There is disclosed a process for the preparation of copolymers of a vinyl halide and a long-chain aliphatic vinyl monomer. In accordance with the process, an aqueous dispersion is formed of a preformed vinyl halide polymer, a vinyl halide monomer and a long-chain aliphatic ether monomer capable of copolymerizing with the vinyl halide monomer. Copolymerization of said monomers in the presence of the aqueous dispersion of the preformed polymer leads to a polymeric particle whose shell contains a major proportion of the polymeric long-chain aliphatic ether monomer and whose core is essentially devoid of this monomer. This preferential concentration of a lubricating monomer on the outer shell of the particle leads to greatly improved flow with only a minor loss in glass temperature.
    • 公开了一种制备乙烯基卤化物和长链脂肪族乙烯基单体的共聚物的方法。 根据该方法,水分散体由预先形成的乙烯基卤聚合物,乙烯基卤单体和能够与卤代乙烯单体共聚的长链脂族醚单体形成。 所述单体在预成型聚合物的水分散体存在下的共聚导致聚合物颗粒,其外壳含有主要部分的聚合长链脂族醚单体,其核心基本上不含该单体。 润滑单体在颗粒外壳上的这种优先浓缩导致流动性大大改善,而玻璃温度仅有轻微的损失。