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    • 5. 发明授权
    • ABS type thermoplastic moulding compounds
    • ABS型热塑性成型料
    • US5719232A
    • 1998-02-17
    • US424656
    • 1995-04-19
    • Adolf SchmidtHerbert EichenauerUlrich Jansen
    • Adolf SchmidtHerbert EichenauerUlrich Jansen
    • C08F2/22C08L55/02
    • C08L55/02Y10S525/902
    • ABS type thermoplastic moulding compounds obtainable by A) producing a rubber latex with an average particle diameter d.sub.50 of 30 to 160 nm and a gel content of 75 to 100 wt. % B) emulsion polymerization of an amount of butadiene and optionally up to 50 wt. % (with reference to the total amount of monomer in stage B) of a comonomer in the presence of the rubber obtained in stage A, such that a rubber latex (B) with an average particle diameter d.sub.50 =220 to 330 nm and a gel content of 25 to 70 wt. % is produced, C) emulsion polymerization of 40 to 95 parts by wt. of a mixture of styrene and acrylonitrile, which optionally contains up to 50 wt. % (with reference to the total amount of monomers used in stage C) of one or more comonomers, in the presence of 5 to 60 parts by wt. (with reference to the solids) of the rubber obtained in stage B by introducing the monomer in such a way that 55 to 90 wt. % of the monomers are added within the first half of the total monomer introduction time, and D) mixing the polymer obtained in stage C, preferably after first converting it into a powder, with at least one thermoplastic vinyl resin.
    • ABS型热塑性成型化合物,其可通过以下方法得到:A)制备平均粒径d50为30〜160nm,凝胶含量为75〜100重量%的橡胶胶乳。 B)一定量的丁二烯的乳液聚合和任选的至多50wt。 在阶段A中获得的橡胶存在下,共聚单体的%(相对于阶段B中的单体的总量),使得平均粒径d 50 = 220〜330nm的橡胶胶乳(B)和凝胶 含量为25〜70wt。 产生%,C)乳液聚合40〜95重量份。 的苯乙烯和丙烯腈的混合物,其任选地含有至多50重量% 在5至60重量份存在下,一种或多种共聚单体的%(相对于阶段C中使用的单体的总量)。 (相对于固体),通过以55〜90重量%的比例引入单体,得到阶段B中得到的橡胶。 在全部单体引入时间的前半部分内加入%的单体,和D)将在阶段C中获得的聚合物,优选在首先将其转化为粉末之后,与至少一种热塑性乙烯基树脂混合。
    • 8. 发明授权
    • Continuous bulk polymerization process
    • 连续本体聚合工艺
    • US4141934A
    • 1979-02-27
    • US668984
    • 1976-03-22
    • Frank WinglerAdolf SchmidtLothar LiebigGerd Wassmuth
    • Frank WinglerAdolf SchmidtLothar LiebigGerd Wassmuth
    • C08F2/00C08F2/02C08F212/10C08F220/00C08F220/42C08F257/02
    • C08F212/10
    • Copolymers ofA 22 to 96 mol-% of styrene and/or .alpha.-methyl styrene,B 0 to 78 mol-% of at least one monoolefinically unsaturated monomer containing nitrile groups, andC 0 to 50 mol-% of at least one monoolefinically unsaturated monomer different from A or B are obtained by continuous bulk polymerization in a homogeneous liquid phase, in several process stages, in one or more different temperature ranges and in the presence of one or more initiators with different dissociation times in each temperature range and under pressures of from 1 to 20 bars.In first stage the monomers are copolymerized with backmixing up to a conversion of from 10 - 60 mol-% in an ideally mixed tank reactor and then after optionally additional addition of further parts of monomers copolymerization is continued with backmixing in a completely flooded, self-cleaning polymerization kneader up to a residual monomer content of from 10-50 mol-%.Residual monomers are continuously removed from the copolymer up to a content of less than 0.5% by weight based on the copolymer.The process according to the invention provides uniform, compatible, homogeneous products which are free from gel-like particles and which combine improved transparency with greater dimensional stability under heat and better mechanical properties together with improved processibility.
    • A 22至96摩尔%的苯乙烯和/或α-甲基苯乙烯的共聚物,B 0至78摩尔%的至少一种含有腈基的单烯属不饱和单体和C 0至50摩尔%的至少一种单烯烃 不同于A或B的不饱和单体通过在均相液相中,在几个工艺阶段中,在一个或多个不同温度范围内并且在一个或多个在每个温度范围和下面具有不同解离时间的引发剂的存在下连续本体聚合获得 压力为1至20巴。