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    • 8. 发明授权
    • Vinyl halide polymer impact modifiers
    • VINYL HALIDE聚合物冲击改性剂
    • US4145380A
    • 1979-03-20
    • US650480
    • 1976-01-19
    • Robert M. MyersDavid L. DunkelbergerDaniel T. Carty
    • Robert M. MyersDavid L. DunkelbergerDaniel T. Carty
    • C08F257/02C08F285/00C08L27/06C08L51/00C08F265/06C08F291/02C08F291/06
    • C08F257/02C08F285/00C08L27/06C08L51/00
    • A three-stage, sequentially produced graft polymer comprises (A) a non-rubbery, hard first stage polymer formed by the sequential polymerization of a monomer charge of 50 to 100 weight percent of a vinylaromatic compound, 0 to 50 weight percent of a different monovinylidene monomer interpolymerizable therewith, and 0 to 10 weight percent of a polyfunctional crosslinking monomer based on the weight of the monomer charge; (B) a second stage rubbery polymer formed by sequentially polymerizing in the presence of the hard polymer Stage (A) a second monomer charge of 50 to 100 weight percent of butadiene, isoprene, chloroprene, an alkyl acrylate or mixtures thereof wherein the alkyl group of the alkyl acrylate has about 3 to 8 carbon atoms, 0 to 50 weight percent of a monovinylidene monomer interpolymerizable therewith, and 0 to 10 weight percent of a polyfunctional crosslinking agent; and (C) a third stage polymer formed by sequentially polymerizing in the presence of the Stage (A) and Stage (B) polymer product a monomer charge of 50 to 100 weight percent of an alkyl methacrylate wherein the alkyl group has about 1 to 4 carbon atoms, 0 to 50 weight percent of a vinylidene monomer interpolymerizable therewith, and 0 to 10 weight percent of a polyfunctional crosslinking monomer, and/or 0 to 1.0 weight percent of an alkyl mercaptan of 3 to 12 carbon atoms. Preferably the polymer is used as a modifier for vinyl halide polymers. When so used, the refractive index of the first two stages of the graft polymer is substantially equal to the refractive index of the vinyl halide polymer.
    • 9. 发明授权
    • Vinyl halide polymer impact modifiers
    • 氯乙烯卤聚​​合物抗冲改性剂
    • US4064197A
    • 1977-12-20
    • US650479
    • 1976-01-19
    • Robert M. MyersDavid L. DunkelbergerDaniel T. Carty
    • Robert M. MyersDavid L. DunkelbergerDaniel T. Carty
    • C08F257/02C08F285/00C08L27/06C08L51/00
    • C08F257/02C08F285/00C08L27/06C08L51/00
    • A three-stage, sequentially produced graft polymer comprises (A) a non-rubbery, hard first stage polymer formed by the sequential polymerization of a monomer charge of 50 to 100 weight percent of a vinylaromatic compound, 0 to 50 weight percent of a different monovinylidene monomer interpolymerizable therewith, and 0 to 10 weight percent of a polyfunctional crosslinking monomer based on the weight of the monomer charge; (B) a second stage rubbery polymer formed by sequentially polymerizing in the presence of the hard polymer Stage (A) a second monomer charge of 50 to 100 weight percent of butadiene, isoprene, chloroprene, an alkyl acrylate or mixtures thereof wherein the alkyl group of the alkyl acrylate has about 3 to 8 carbon atoms, 0 to 50 weight percent of a monovinylidene monomer interpolymerizable therewith, and 0 to 10 weight percent of a polyfunctional crosslinking agent; and (C) a third stage polymer formed by sequentially polymerizing in the presence of the Stage (A) and Stage (B) polymer product a monomer charge of 50 to 100 weight percent of an alkyl methacrylate wherein the alkyl group has about 1 to 4 carbon atoms, 0 to 50 weight percent of a vinylidene monomer interpolymerizable therewith, and 0 to 10 weight percent of a polyfunctonal crosslinking monomer, and/or 0 to 1.0 weight percent of an alkyl mercaptan of 3 to 12 carbon atoms. Preferably the polymer is used as a modifier for vinyl halide polymers. When so used, the refractive index of the first two stages of the graft polymer is substantially equal to the refractive index of the vinyl halide polymer.
    • 三阶段顺序生产的接枝聚合物包括(A)通过顺序聚合50至100重量百分比的乙烯基芳族化合物,0至50重量%的不同的乙烯基芳族化合物形成的非橡胶状硬质第一阶段聚合物 可与其共聚的单亚乙烯基单体和基于单体电荷重量的0至10重量%的多官能交联单体; (B)第二阶段橡胶质聚合物,其通过在硬质聚合物阶段(A)存在下依次聚合形成,所述第二阶段橡胶状聚合物是具有50至100重量%的丁二烯,异戊二烯,氯丁二烯,丙烯酸烷基酯或其混合物的第二单体进料,其中所述烷基 的丙烯酸烷基酯具有约3至8个碳原子,0至50重量%的可与其共聚的单亚乙烯基单体和0至10重量%的多官能交联剂; 和(C)通过在阶段(A)和阶段(B))聚合物产物的存在下依次聚合形成的第三阶段聚合物,其单体进料为50至100重量%的甲基丙烯酸烷基酯,其中烷基具有约1至4个 0至50重量%的可与其共聚的亚乙烯基单体和0至10重量%的聚焦点交联单体和/或0至1.0重量%的3至12个碳原子的烷基硫醇。 优选地,聚合物用作卤化乙烯聚合物的改性剂。 当这样使用时,接枝聚合物的前两个阶段的折射率基本上等于卤乙烯聚合物的折射率。