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    • 2. 发明申请
    • Thermoplastic Plastic Moulding Compositions with Improved Optical Properties
    • 具有改进光学性能的热塑性塑料成型组合物
    • US20080207830A1
    • 2008-08-28
    • US12088759
    • 2006-09-25
    • Martin WeberAxel GottschalkPeter IttemannHans Honl
    • Martin WeberAxel GottschalkPeter IttemannHans Honl
    • C08L51/00
    • C08L33/12C08F279/02C08F285/00C08L25/12C08L35/06C08L51/04C08L55/02C08L2205/03C08L2666/02C08L2666/04
    • The present invention relates to thermoplastic molding compositions, comprising a mixture composed of (A) from 30 to 69% by weight, based on the entirety of components (A), (B) and (C), of a methyl methacrylate polymer, (B) from 30 to 69% by weight, based on the entirety of components (A), (B) and (C), of a copolymer, obtainable via polymerization of a vinylaromatic monomer and of a vinyl cyanide, and (C) from 1 to 40% by weight, based on the entirety of components (A), (B) and (C), of a graft copolymer, obtainable from (C1) from 60 to 90% by weight, based on (C), of an agglomerated core based on a 1,3-diene, (C2) from 5 to 20% by weight, based on (C), of a first graft shell composed of a vinylaromatic monomer, of an alkyl methacrylate, and, if appropriate, of a crosslinking monomer, and (C3) from 5 to 20% by weight, based on (C), of a second graft shell composed of an alkyl(meth)acrylate polymer, with the proviso that the ratio by weight of (C2) to (C3) is in the range from 2:1 to 1:2, and it is inventively significant here that the core (C1) has monomodal particle size distribution, the average particle size D50 of the core (C1) (determined by the method mentioned in the description) is in the range from 300 to 400 nm, and the difference between the refractive index (nD-C) of the entire component (C) and the refractive index (nD-AB) of the entire matrix of components (A) and (B) is in the range from 0.003 to 0.008, each of the refractive indices being measured by the methods mentioned in the description, and also to a process for preparation of these molding compositions, to their use, and to the moldings obtainable therefrom.
    • 本发明涉及热塑性模塑组合物,其包含基于甲基丙烯酸甲酯聚合物(A),(B)和(C)的全部(A),(B)和(C)的(A)30至69重量% B)基于通过乙烯基芳族单体和乙烯基氰的聚合可获得的共聚物的组分(A),(B)和(C))的总量的30至69重量%,和(C) 1〜40重量%,基于(C)60〜90重量%(C),(C)可以由(C1)得到的接枝共聚物的成分(A),(B)和(C) 基于(C)5-20重量%的由乙烯基芳族单体组成的第一接枝壳,甲基丙烯酸烷基酯和(如果合适的话)的基于1,3-二烯的聚集的核心, 的交联单体,和(C3)基于(C)5-20重量%的由(甲基)丙烯酸烷基酯聚合物组成的第二接枝壳,条件是(C2)的重量比 至(C3)的比例在2:1至1:2的范围内 在本发明中,芯(C1)具有单峰粒度分布,芯(C1)的平均粒径D <50>(由说明书中提及的方法确定)在 300至400nm的范围,以及整个组分(C)的折射率(n-D-C-C)与折射率(n> D < 组分(A)和(B)的整个基质的AB)在0.003至0.008的范围内,每个折射率通过说明书中提及的方法测量,并且还涉及制备这些模塑组合物的方法 ,使用,以及可从其获得的模制品。