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48 条记录 (耗时 0.016 秒)

    Process for the preparation of branched polycarbonates
    1.
    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

    申请人： Karsten Idel ,  Dieter Freitag ,  Werner Nouvertne

    发明人： Karsten Idel ,  Dieter Freitag ,  Werner Nouvertne

    IPC分类号： C08G63/00 ,  C08G64/00 ,  C08G64/06 ,  C08G63/62

    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。

    Process for the preparation of polyarylene sulphides
    6.
    发明授权
    Process for the preparation of polyarylene sulphides 失效
    聚亚芳基硫醚的制备方法

    公开(公告)号：US4362864A

    公开(公告)日：1982-12-07

    申请号：US263421

    申请日：1981-05-14

    申请人： Karsten Idel ,  Dieter Freitag ,  Ludwig Bottenbruch ,  Josef Merten

    发明人： Karsten Idel ,  Dieter Freitag ,  Ludwig Bottenbruch ,  Josef Merten

    IPC分类号： C08G75/02 ,  C08G75/06 ,  C08L81/02 ,  C08G75/14

    CPC分类号： C08G75/0254 ,  C08G75/0231

    摘要： A process for preparing a polyarylene sulphide which comprises reacting(a) dihalogenobenzene consisting of 50 to 100 mol % of a compound of the formula ##STR1## or a compound of the formula ##STR2## or a mixture thereof and of 0 to 50 mol % of a compound of the formula ##STR3## wherein X is halogen and each R is selected from the group consisting of hydrogen, alkyl having 1 to 20 carbon atoms, cycloalkyl having 5 to 20 carbon atoms, aryl having 6 to 24 carbon atoms, alkaryl having 7 to 24 carbon atoms and aralkyl having 7 to 24 carbon atoms with the proviso that at least one R is other than hydrogen and(b) 0 to 3.0 mol % based on the dihalogenobenzene content of a polyhalogeno aromatic of the formulaArX.sub.n (IV) wherein Ar is an aromatic or heterocyclic radical with 6 to 24 carbon atoms having at least 3 free valencies, X is halogen and n is .gtoreq. 3 with(c) an alkyl metal sulphide in(d) a polar solvent in the presence of(e) 0.05-2.0 mol of alkali metal fluoride per mol of alkali metal sulphide,for a polycondensation time of up to 30 hours and at a polycondensation temperature of between 160.degree. and 295.degree. C., the molar ratio of (a) to (c) being in the range from 0.85:1 to 1.15:1 and the molar ratio of (c) to (d) being in the range of from 1:2 to 1:15.

    摘要翻译： 一种制备聚亚芳基硫醚的方法，其包括使（a）由50至100mol％的式（I）化合物或式IIa化合物或其混合物组成的二卤代苯和 0至50摩尔％的式（III）化合物，其中X为卤素且每个R选自氢，具有1至20个碳原子的烷基，具有5至20个碳原子的环烷基， 具有6至24个碳原子的芳基，具有7至24个碳原子的烷芳基和具有7至24个碳原子的芳烷基，条件是至少一个R不是氢，和（b）基于二卤代苯含量为0-3.0mol％ 式ArXn（IV）的多卤代芳族化合物，其中Ar是具有至少3个自由价的6至24个碳原子的芳族或杂环基，X是卤素，n是≥3，（c）烷基金属硫化物 （d）在（e）0.05-2.0mol碱金属氟化物存在下，每摩尔的极性溶剂 碱金属硫化物，缩聚时间长达30小时，缩聚温度在160〜295℃之间，（a）与（c）的摩尔比在0.85:1-1.15:1的范围内， 1和（c）至（d）的摩尔比在1:2至1:15的范围内。