Method for making aromatic bis(ether dicarboxylic acid)s
    5.
    发明授权
    Method for making aromatic bis(ether dicarboxylic acid)s 失效
    制备芳族双(醚二羧酸)的方法

    公开(公告)号:US4054600A

    公开(公告)日:1977-10-18

    申请号:US590877

    申请日:1975-06-27

    申请人: Donald S. Johnson

    发明人: Donald S. Johnson

    IPC分类号: C07C51/06

    CPC分类号: C07C323/00

    摘要: A method is provided for making aromatic bis(ether dicarboxylic acid)s, such as 2,2-bis[4(3,4-dicarboxyphenoxy)phenyl] propane. The corresponding aromatic bis(etherimide) is hydrolyzed in base to produce a tetraacid salt which is directly acidified with concentrated mineral acid such as sulfuric acid. The resulting aqueous mixture containing a paste is heated to produce the aromatic bis(ether dicarboxylic acid) in ready filterable form.

    摘要翻译: 提供了制备芳族双(醚二羧酸)的方法,例如2,2-双[4(3,4-二羧基苯氧基)苯基]丙烷。 相应的芳基双(醚酰亚胺)在碱中水解,产生四酸,其用浓无机酸如硫酸直接酸化。 将所得到的含有糊状物的含水混合物加热以产生可以过滤的形式的芳族双(醚二羧酸)。

    Aromatic polyformal-polycarbonate block polymers and method for making
same
    8.
    发明授权
    Aromatic polyformal-polycarbonate block polymers and method for making same 失效
    芳香族聚甲醛 - 聚碳酸酯嵌段聚合物及其制备方法

    公开(公告)号:US4210731A

    公开(公告)日:1980-07-01

    申请号:US942950

    申请日:1978-09-18

    IPC分类号: C08G64/18 C08L69/00

    CPC分类号: C08G64/18 Y10S525/905

    摘要: There are provided aromatic polyformal-polycarbonate block polymers and method for making such materials. The polyformal-polycarbonate block polymers can be made by phosgenating a mixture of a bisphenol and oligomeric aromatic polyformal having terminal phenolic groups. The aromatic block polymers are high performance thermoplastics having improved hydrolytic stability compared to aromatic polycarbonates and improved heat distortion temperature compared to conventional aromatic polyformal.

    摘要翻译: 提供芳族聚甲醛 - 聚碳酸酯嵌段聚合物和制备这种材料的方法。 聚甲醛 - 聚碳酸酯嵌段聚合物可以通过使具有末端酚基的双酚和低聚芳族聚异构体的混合物光气化而制成。 芳族嵌段聚合物是与芳族聚碳酸酯相比具有改进的水解稳定性和与常规芳族聚酰胺相比改进的热变形温度的高性能热塑性塑料。

    Preparation of aromatic bisimides
    9.
    发明授权
    Preparation of aromatic bisimides 失效
    芳香双酰亚胺的制备

    公开(公告)号:US4054577A

    公开(公告)日:1977-10-18

    申请号:US683648

    申请日:1976-05-06

    摘要: Aromatic bisimides can be prepared by effecting reaction under anhydrous conditions between a 3- or 4-nitro-N-substituted phthalimide with an aromatic dihydroxy compound in the presence of a certain class of dipolar aprotic compounds as solvent and solid potassium carbonate and in the further presence of a particulate zeolite adsorbent.

    摘要翻译: 芳族双酰亚胺可以通过在一定量的偶极非质子化合物作为溶剂和固体碳酸钾的存在下,在3-或4-硝基-N-取代的邻苯二甲酰亚胺与芳族二羟基化合物之间的无水条件下进行反应来制备。 微粒沸石吸附剂的存在。