Polycarbonate of cycloalkylidene bisphenol
    11.
    发明授权
    Polycarbonate of cycloalkylidene bisphenol 失效
    环亚烷基双酚的聚碳酸酯

    公开(公告)号:US5010163A

    公开(公告)日:1991-04-23

    申请号:US450604

    申请日:1989-12-13

    IPC分类号: C08G64/00 C08G64/06

    CPC分类号: C08G64/06

    摘要: Thermoplastic aromatic polycarbonates having average molecular weight Mw of at least 10,000 which contain bifunctional carbonate structural units corresponding to formula (I) ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another represent hydrogen, a C.sub.1 -C.sub.12 -hydrocarbon, halogen,m is 2 or 3 andX represents hydrogen or a C.sub.6 -C.sub.12 hydrocarbon, at least one substituent X being a C.sub.6 -C.sub.12 hydrocarbon radical,in quantities of from 100 to 1 mol-% based on the total quantity of difunctional carbonate structural units in the polycarbonate.

    摘要翻译: 具有至少10,000的平均分子量& Mw和Mw的热塑性芳族聚碳酸酯,其含有对应于式(I)的双官能碳酸酯结构单元,其中R 1,R 2,R 3和R 4彼此独立地表示氢,C1- C 12烃,卤素,m为2或3,X表示氢或C 6 -C 12烃,至少一个取代基X为C 6 -C 12烃基,其量为100至1摩尔%,基于总量 的聚碳酸酯中的双官能碳酸酯结构单元。

    Polycarbonate molding compositions with improved flame-repellency
    14.
    发明授权
    Polycarbonate molding compositions with improved flame-repellency 失效
    具有改善阻燃性能的聚碳酸酯模塑组合物

    公开(公告)号:US4208489A

    公开(公告)日:1980-06-17

    申请号:US868145

    申请日:1978-01-09

    CPC分类号: C08K5/3417 C08K3/00 C08K5/34

    摘要: Thermoplastic aromatic polycarbonate molding compositions with improved flame retardancy which contain an alkali metal salt of an organic or inorganic acid and optionally a perfluoroethylene, characterized in that they contain a tetrahalogenophthalimide of the general formulae (I) or (II) or mixtures thereof ##STR1## wherein R denotes a hydrogen atom or a C.sub.1 to C.sub.4 l alkyl, C.sub.6 H.sub.5, C.sub.10 H.sub.7, C.sub.6 H.sub.4 X, C.sub.6 H.sub.3 X.sub.2 or C.sub.6 H.sub.2 X.sub.3 group, in which X denotes a fluorine, chlorine or bromine atom, R' denotes a single bond or a C.sub.2 to C.sub.4 alkylene, C.sub.6 H.sub.4 or p-diphenylene radical, and Z denotes a chlorine or bromine atom,are provided.

    摘要翻译: 具有改进的阻燃性的热塑性芳族聚碳酸酯模塑组合物,其包含有机或无机酸的碱金属盐和任选的全氟乙烯,其特征在于它们含有通式(I)或(II)的四卤代邻苯二甲酰亚胺或其混合物。 其中R表示氢原子或C1至C4烷基,C6H5,C10H7,C6H4X,C6H3X2或C6H2X3基团,其中X表示氟,氯或溴原子,R'表示单键或C2至C4亚烷基, C6H4或对二亚苯基,Z表示氯或溴原子。

    Process for the production of thermoplastic polycarbonates
    19.
    发明授权
    Process for the production of thermoplastic polycarbonates 失效
    用于生产热塑性聚碳酸酯的方法

    公开(公告)号:US5373082A

    公开(公告)日:1994-12-13

    申请号:US155309

    申请日:1993-11-19

    CPC分类号: C08G64/30

    摘要: A process for the production of polycarbonates by melt transesterification is disclosed. Accordingly, polycarbonate waste is dissolved in monophenols and at an elevated temperature and in the presence of a catalyst degraded to yield oligocarbonates, diaryl carbonates and diphenols. Following the optional separation of fillers and other additives there is produced by partial recondensation and the distillation of monophenol a higher viscosity oligocarbonate having a OH and aryl carbonate terminal groups and a weight average molecular weight of 8000 to 18000, the oligocarbonate thus produced is then polycondensed to form a polycarbonate resin.

    摘要翻译: 公开了通过熔融酯交换法生产聚碳酸酯的方法。 因此,将聚碳酸酯废物溶解在单酚中并在升高的温度下并在催化剂存在下降解以产生低聚碳酸酯,碳酸二芳基酯和二酚。 在填充剂和其它添加剂的任选分离之后,通过部分重新缩合和单酚蒸馏产生具有OH和芳基碳酸酯末端和重均分子量为8000至18000的较高粘度的低聚碳酸酯,然后将如此生产的低聚碳酸酯进行缩聚 以形成聚碳酸酯树脂。