| 摘要 |
High viscosity acrylonitrile-butadiene-styrene (ABS) molding composition comprises a polymer comprising a graft styrene/acrylonitrile polymer and three different butadiene latexes, a graft polymer with rubber and a rubber-free copolymer. ABS molding composition comprises: (I) a graft polymer obtained by the emulsion polymerization of styrene and acrylonitrile, optionally substituted by alpha -methyl styrene, methyl methacrylate and/or N-phenyl maleinimide, in a ratio of 90:10-50:50 in the presence of a mixture of 40-95 wt.% of a butadiene latex (A) of average particle diameter d50 at most 230 nm, 35-75 wt.% of a butadiene latex (B) of d50 250-330 nm, 60-90 wt.% of a butadiene polymer latex (C) of d50 at least 350 nm and 0-50 wt.% further vinyl monomers, such that the ratio of graft monomers:butadiene polymers is 10:90-60:40; and (II) a graft polymer obtained by the solution, mass or suspension polymerization of styrene and acrylonitrile, optionally substituted by alpha -methyl styrene, methyl methacrylate and/or N-phenyl maleinimide, in a ratio of 90:10-50:50 in the presence of a rubber containing 0-50 wt.% of a further vinyl monomers, where the ratio of graft monomers:rubber is 50:50-97:3; and optionally (III) a rubber-free copolymer of styrene and acrylonitrile, optionally substituted by alpha -methyl styrene, methyl methacrylate and/or N-phenyl maleinimide, in a ratio of 90:10-50:50. Independent claims are included for the production of the above molding composition by mixing and extruding the components and molded articles obtained from the composition.
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