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    • 5. 发明授权
    • Process for the preparation of an acrylate-vinyl chloride graft polymer
    • 制备丙烯酸酯 - 氯乙烯接枝聚合物的方法
    • US4981907A
    • 1991-01-01
    • US260445
    • 1988-10-20
    • Heinz KlippertManfred Engelmann
    • Heinz KlippertManfred Engelmann
    • C08F265/04
    • C08F265/04
    • A process is described for the preparation of a polymer which contains, besides polymerized units of vinyl chloride, 30 to 60% by weight, relative to the polymer, of polymerized units of an acrylate, if appropriate together with copolymerizable monomers. The acrylate is firstly polymerized in aqueous emulsion with addition of a monomer containing at least 2 ethylenically unsaturated, non-conjugated double bonds in the presence of a fatty acid salt and in the presence of an alkane- or alkylarylsulfonate. Polymerization in aqueous suspension is then carried out in which vinyl chloride, customary polymerization auxiliaries, a precipitant for the emulsifiers used in the emulsion polymerization, and water are initially introduced, and the acrylate dispersion produced by emulsion polymerization is subsequently added. Polymers of high bulk density and good free-flowing properties which can easily be demonomerized are thus obtained. Mixed with vinyl chloride homopolymers, moldings having good impact resistance and surface quality are obtained with good processability.
    • 描述了一种用于制备聚合物的方法,除了氯乙烯的聚合单元之外,如果合适的话,该聚合物相对于聚合物,其含有相对于聚合物的聚合单元为30〜60重量%,以及可共聚的单体。 丙烯酸酯首先在水性乳液中聚合,在脂肪酸盐存在下加入含有至少2个烯键式不饱和的非共轭双键的单体,并在烷烃 - 或烷基芳基磺酸盐存在下进行聚合。 然后进行水性悬浮液的聚合,其中最初引入氯乙烯,常规聚合助剂,用于乳液聚合中使用的乳化剂的沉淀剂和水,然后加入通过乳液聚合制备的丙烯酸酯分散体。 因此获得了易于被脱单体化的高堆积密度和良好自由流动性的聚合物。 与氯乙烯均聚物混合,具有良好的耐冲击性和表面质量的模塑制品具有良好的加工性能。