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    Aromatic amorphous thermoplastic terpolymers
    2.
    发明授权
    Aromatic amorphous thermoplastic terpolymers 失效
    芳香族无定形热塑性三元共聚物

    公开(公告)号：US4857625A

    公开(公告)日：1989-08-15

    申请号：US35259

    申请日：1987-04-02

    申请人： Robert A. Clendinning ,  Louis M. Maresca ,  Markus Matzner ,  Thomas H. Schwab

    发明人： Robert A. Clendinning ,  Louis M. Maresca ,  Markus Matzner ,  Thomas H. Schwab

    IPC分类号： C08G75/23 ,  C08L71/00 ,  C08L81/06

    CPC分类号： C08L71/00 ,  C08G75/23 ,  C08L81/06

    摘要： Described herein are amorphous thermoplastic terpolymers containing units of the formula: ##STR1## wherein R is independently hydrogen, C.sub.1 to C.sub.6 alkyl, or C.sub.4 to C.sub.8 cycloalkyl, X' is independently ##STR2## wherein R.sub.1 and R.sub.2 are independently hydrogen or C.sub.1 to C.sub.9 alkyl; ##STR3## wherein R.sub.3 and R.sub.4 are independently hydrogen or C.sub.1 to C.sub.8 alkyl and a.sub.1 is an integer of 2 to 7; --S--, --O--, or ##STR4## a is an integer of 0 to 4 and n is independently an integer of 1 to 3. The units are attached to each other by an --0-- bond. These polymers have an excellent combination of mechanical properties. They display high notched izod impact values, high heat distortion temperatures and excellent environmental stress crack resistance.

    摘要翻译： 本文描述的是含有下式的单元的无定形热塑性三元共聚物：其中R独立地是氢，C 1至C 6烷基或C 4至C 8环烷基，X 1是（C 1 -C 6） 独立地，其中R 1和R 2独立地是氢或C 1至C 9烷基; 其中R 3和R 4独立地是氢或C 1至C 8烷基，而a1是2至7的整数; -S-，-O-或 a为0〜4的整数，n为1〜3的整数。该单元通过-O-键彼此连接。 这些聚合物具有优异的机械性能组合。 它们显示出高切口izod冲击值，高热变形温度和优异的耐环境应力开裂性。

    Process for preparing polyarylates
    5.
    发明授权
    Process for preparing polyarylates 失效
    多芳基化合物的制备方法

    公开(公告)号：US4321355A

    公开(公告)日：1982-03-23

    申请号：US189561

    申请日：1980-09-23

    申请人： Louis M. Maresca ,  Markus Matzner ,  Benito See

    发明人： Louis M. Maresca ,  Markus Matzner ,  Benito See

    IPC分类号： C08L101/00 ,  C08G63/00 ,  C08G63/18 ,  C08G63/19 ,  C08G63/81 ,  C08L33/00 ,  C08L33/02 ,  C08L67/00 ,  C08L67/03 ,  C08L77/00

    CPC分类号： C08G63/81 ,  C08G63/19 ,  C08L67/03

    摘要： Described herein is an improved process for preparing a polyarylate having a reduced viscosity of from about 0.5 to greater than 1.0 dl/gm which process comprises the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises removing residual acid anhydride, after formation of the dihydric phenol diester, so that its concentration is less than about 1500 parts per million. The novel polyarylates produced by the improved process of this invention are melt stable and low in color.

    摘要翻译： 本文描述的是制备具有约0.5至大于1.0dl / gm的比浓粘度的多芳基化合物的改进方法，该方法包括以下步骤：（a）使来自含有2至8个碳原子的酸的酸酐 与至少一种二元酚形成相应的二酯; 和（b）在足以形成多芳基化合物的温度下使所述二酯与至少一种芳族二羧酸反应，其中所述改进包括在形成二元酚二酯后除去残余的酸酐，使得其浓度小于约1500份 百万。 通过本发明改进方法生产的新型聚芳酯熔融稳定，颜色低。

    Process for preparing polyarylates
    9.
    发明授权
    Process for preparing polyarylates 失效
    多芳基化合物的制备方法

    公开(公告)号：US4294957A

    公开(公告)日：1981-10-13

    申请号：US69819

    申请日：1979-08-27

    申请人： Mitchell H. Berger ,  Louis M. Maresca ,  Markus Matzner

    发明人： Mitchell H. Berger ,  Louis M. Maresca ,  Markus Matzner

    IPC分类号： C08G63/00 ,  C08G63/19 ,  C08G63/81 ,  C08G63/46 ,  C08G63/18

    CPC分类号： C08G63/19 ,  C08G63/81

    摘要： Described herein is a process for preparing polyarylates of improved color which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of at least one cycloaliphatic, substituted aromatic or heteroaromatic compound, which compounds contain at least one benzylic and/or tertiary hydrogen atom, at a temperature of from about 260.degree. to about 350.degree. C. Optionally, the process may be carried out in the presence of a magnesium, manganese, or zinc catalyst.

    摘要翻译： 本文描述了一种制备改进颜色的多芳基化合物的方法，该方法包括使二元酚的二酯衍生物与芳族二羧酸在约10至约60重量％的至少一种脂环族取代的芳族或杂芳族化合物的存在下反应， 该化合物在约260℃至约350℃的温度下含有至少一个苄基和/或叔氢原子。任选地，该方法可以在镁，锰或锌催化剂的存在下进行。