利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

28 条记录 (耗时 0.031 秒)

    Method for making flame retardant polycarbonate
    2.
    发明授权
    Method for making flame retardant polycarbonate 失效
    制造阻燃聚碳酸酯的方法

    公开(公告)号：US5300624A

    公开(公告)日：1994-04-05

    申请号：US66381

    申请日：1993-05-24

    申请人： Eugene P. Boden ,  Peter D. Phelps

    发明人： Eugene P. Boden ,  Peter D. Phelps

    IPC分类号： C08G64/00 ,  C08G64/10 ,  C08G64/22 ,  C08G64/24

    CPC分类号： C08G64/24 ,  C08G64/10

    摘要： A method is provided for making flame retardant polycarbonates by phosgenating a mixture of bisphenols having up to about 50 mole % of tetrahalobisphenols, such as tetrabromobisphenols. There is employed a mixture of a phase transfer catalyst and a tertiary organic amine to provide high molecular weight copolymer without excessive phosgene usage.

    摘要翻译： 提供了一种制备阻燃聚碳酸酯的方法，该方法是通过使具有最多约50摩尔％的四卤代双酚（例如四溴双酚）的双酚的混合物进行光气化。 使用相转移催化剂和叔有机胺的混合物以提供高分子量共聚物而不过度使用光气。

    Method for preparing polycarbonates containing aliphatic ester groups
    5.
    发明授权
    Method for preparing polycarbonates containing aliphatic ester groups 失效
    制备含脂肪族酯基团的聚碳酸酯的方法

    公开(公告)号：US5015720A

    公开(公告)日：1991-05-14

    申请号：US535258

    申请日：1990-06-08

    申请人： Eugene P. Boden ,  Peter D. Phelps

    发明人： Eugene P. Boden ,  Peter D. Phelps

    IPC分类号： C08G63/64 ,  C08G64/22

    CPC分类号： C08G63/64

    摘要： Polycarbonates containing aliphatic dicarboxylic ester groups, and having glass transition temperatures and processing temperatures lower than the corresponding homopolycarbonates are prepared via an intermediate which is in turn prepared from a dihydroxyaromatic compound and a C.sub.4-6 aliphatic dicarboxylic acid anhydride, preferably succinic anhydride. Phosgenation of said intermediate produces the desired soft segment polycarbonate.

    Catalytic, interfacial, pH controlled preparation of polyester polycarbonate
    8.
    发明授权
    Catalytic, interfacial, pH controlled preparation of polyester polycarbonate 失效
    聚酯聚碳酸酯的催化，界面，pH控制制备

    公开(公告)号：US5274068A

    公开(公告)日：1993-12-28

    申请号：US872372

    申请日：1992-04-23

    申请人： Eugene P. Boden ,  Peter D. Phelps

    发明人： Eugene P. Boden ,  Peter D. Phelps

    IPC分类号： C08G63/64 ,  C08G63/79

    CPC分类号： C08G63/64 ,  C08G63/79

    摘要： Polycarbonates are prepared from dihydric phenols, carbonate precursors, an aliphatic dicarboxylic acid having from 4 to 8 carbon atoms, and a catalyst selected from the group consisting of phase transfer catalysts and trialkylamines, wherein the initial pH is maintained from 3 to 8 until 40 to 90 percent of the total amount of carbonate precursor is added, and the pH is then raised to 10-12 until the reaction is complete.

    摘要翻译： 聚碳酸酯由二元酚，碳酸酯前体，具有4-8个碳原子的脂族二羧酸和选自相转移催化剂和三烷基胺的催化剂制备，其中初始pH保持在3至8直至40至 加入碳酸酯前体总量的90％，然后将pH升至10-12直到反应完成。

    Preparation of branched polycarbonate from oligomeric cyclic polycarbonate and polyhydric phenol
    9.
    发明授权
    Preparation of branched polycarbonate from oligomeric cyclic polycarbonate and polyhydric phenol 失效
    从低聚环状聚碳酸酯和多元酚制备支化聚碳酸酯

    公开(公告)号：US5097008A

    公开(公告)日：1992-03-17

    申请号：US521495

    申请日：1990-05-10

    申请人： Herman O. Krabbenhoft ,  Eugene P. Boden

    发明人： Herman O. Krabbenhoft ,  Eugene P. Boden

    IPC分类号： C08G64/14 ,  C08G64/30 ,  C08G75/28

    CPC分类号： C08G75/28 ,  C08G64/14 ,  C08G64/307

    摘要： Branched polycarbonates are prepared by melt equilibration of aromatic cyclic polycarbonate oligomers with a polyhydric phenol having more than two hydroxy groups per molecule, preferably 1,1,1-tris-(4-hydroxyphenyl)ethane, in the presence of a carbonate equilibration catalyst, preferably tetrabutylammonium tetraphenylborate. In an additional embodimetn of the invention, a linear aromatic polycarbonate is added to the reaction mixture. Branched polycarbonates prepared according to this inventin have high melt strength and high shear sensitivity characteristics and are useful in extrusion and injection molding processing applications and particularly useful in blow molding applications for preparing relatively large articles and panels.

    摘要翻译： 通过在碳酸酯平衡催化剂的存在下，芳族环状聚碳酸酯低聚物与每分子具有多于两个羟基的多元酚，优选1,1,1-三（4-羟基苯基）乙烷的熔融平衡来制备支化聚碳酸酯， 优选四丁基铵四苯基硼酸盐。 在本发明的另外的实施方案中，将线性芳族聚碳酸酯加入到反应混合物中。 根据本发明制备的支化聚碳酸酯具有高熔体强度和高剪切敏感性特征，并且可用于挤出和注塑加工应用，并且特别适用于制备相对大的制品和面板的吹塑应用。