Two stage process for the production of aromatic polyester-carbonate
    55.
    发明授权
    Two stage process for the production of aromatic polyester-carbonate 失效
    二阶段生产芳香族聚碳酸酯工艺

    公开(公告)号:US4600753A

    公开(公告)日:1986-07-15

    申请号:US680156

    申请日:1984-12-10

    IPC分类号: C08G63/00 C08G63/64

    CPC分类号: C08G63/64

    摘要: The invention relates to a process for the preparation of aromatic polyester-carbonates wherein, in a first stage, aromatic oligo-esters or oligo-ester-carbonates having hydroxyl end groups are prepared from diaryl esters of aromatic dicarboxylic acids (or their starting materials) and diphenols and, optionally, a diaryl carbonate, by trans-esterification in the melt, and in a second stage these oligo-esters or oligo-ester-carbonates are condensed with phosgene by the phase boundary process to give the polyester-carbonate.

    摘要翻译: 本发明涉及一种制备芳族聚酯 - 碳酸酯的方法,其中在第一阶段中,由芳族二羧酸(或它们的起始原料)的二芳基酯制备具有羟基端基的芳族低聚酯或低聚酯 - 碳酸酯, 和二醇和任选的碳酸二芳基酯,并且在第二阶段中,这些低聚酯或低聚酯 - 碳酸酯通过相界过程与光气缩合,得到聚酯 - 碳酸酯。

    Polycarbonates with alkylphenyl end groups, their preparation and their
use
    59.
    发明授权
    Polycarbonates with alkylphenyl end groups, their preparation and their use 失效
    具有烷基苯基端基的聚碳酸酯,其制备及其用途

    公开(公告)号:US4269964A

    公开(公告)日:1981-05-26

    申请号:US75439

    申请日:1979-09-14

    CPC分类号: C08G64/14

    摘要: This development is concerned with aromatic thermoplastic polycarbonates with special chain terminators which give the polymers enhanced hydrolysis resistance and impact toughness. These chain terminators are alkyl substituted monohydroxy phenyls in which each phenyl is substituted by one alkyl group having 8 or 9 carbon atoms and about 47 to 89% of its hydrogen atoms trisubstituted on carbon atoms with up to about 20% of the substituents in the ortho position and the balance at the para position. This development is also concerned with a process for synthesizing such polymers by using such chain terminators as reactants in generically known synthesis methods for polycarbonates.

    摘要翻译: 这种发展涉及具有特殊链终止剂的芳族热塑性聚碳酸酯,其赋予聚合物增强的耐水解性和冲击韧性。 这些链终止剂是烷基取代的单羟基苯基,其中每个苯基被一个具有8或9个碳原子的烷基取代,并且其在碳原子上三取代的氢原子的约47-89%,在邻位上具有高达约20%的取代基。 位置和对位的余额。 这种发展也涉及通过使用这种链终止剂作为一般已知的聚碳酸酯合成方法中的反应物合成这种聚合物的方法。