Process for the preparation of high molecular weight, optionally
branched polyarylene sulphides
    21.
    发明授权
    Process for the preparation of high molecular weight, optionally branched polyarylene sulphides 失效
    制备高分子量的方法,选择性分支的聚氨酯硫化物

    公开(公告)号:US5118786A

    公开(公告)日:1992-06-02

    申请号:US653990

    申请日:1991-02-11

    IPC分类号: C08G75/025 C08G75/06

    CPC分类号: C08G75/025

    摘要: The invention relates to an anhydrous process for the preparation of high molecular weight, optionally branched polyarylene sulphides. These can be prepared in a polar organic solvent in the absence of water by reaction of dihalogenoaromatics with sodium sulphides and bisulphide or potassium sulphides and bisulphide in the presence of catalysts in a polar organic solvent.

    摘要翻译: 本发明涉及一种用于制备高分子量,任选支化的聚亚芳基硫醚的无水方法。 这些可以在极性有机溶剂中通过在极性有机溶剂中在催化剂存在下,通过二卤代芳族化合物与硫化钠和二硫化物或硫化钾和二硫化氢的反应在无水存在下制备。

    Process for the preparation of branched polycarbonates
    28.
    发明授权
    Process for the preparation of branched polycarbonates 失效
    支链聚碳酸酯的制备方法

    公开(公告)号:US4174437A

    公开(公告)日:1979-11-13

    申请号:US894229

    申请日:1978-04-07

    CPC分类号: C08G64/06 C08K5/42

    摘要: The present invention relates to a process for the preparation of branched thermoplastic polycarbonates, characterized in that diphenols are completely reacted with about 0.05 to about 2.0 mol %, relative to mols of diphenols, of cyanuric chloride in a primary reaction, while controlling the pH and temperature and in the presence of a co-solvent, and thereafter the products are subjected to polycondensation, in accordance with known methods of the phase boundary process, to give high-molecular weight, branched polycarbonates. The invention further relates to the branched polycarbonates prepared by this process.

    摘要翻译: 本发明涉及一种制备支链热塑性聚碳酸酯的方法,其特征在于二酚在一次反应中相对于二酚的摩尔数为约0.05至约2.0摩尔%,同时控制pH和 温度和在共溶剂存在下,然后根据已知的相边界方法对产物进行缩聚,得到高分子量的支化聚碳酸酯。 本发明还涉及通过该方法制备的支化聚碳酸酯。

    Polycarbonate of cycloalkylidene bisphenol
    29.
    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。