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    • 6. 发明授权
    • Alkoxysilane and alkoxysilane terminated polyamic or polyimide lacquer
composition
    • 烷氧基硅烷和烷氧基硅烷终止的聚酰胺或聚酰亚胺漆组合物
    • US5036145A
    • 1991-07-30
    • US377114
    • 1989-07-10
    • Garry K. EchterlingJohn E. Herweh
    • Garry K. EchterlingJohn E. Herweh
    • C08G73/10C08G77/54C09D183/14
    • C08G73/106C08G73/1007C08G77/54C09D183/14
    • An alkoxysilane bearing amic acid or derivative thereof is formed by reacting an aromatic or aliphatic dianhydride and an aminoalkyltrialkoxysilane or aminoaryltrialkoxysilane, or reacting an aromatic or aliphatic dianhydride and a diamine to form an amic acid which is reacted with an aminoalkylenetrialkoxysilane. A thin, hard protective silica glass network is formed by reacting the alkoxysilane bearing amic acid with an alkoxysilane, preferably tetraalkoxysilane, and an epoxy bearing silane coupling agnet in an acid catalyzed sol-gel process involving hydrolysis and condensation, which provides an amide/ester modified silica network. In a variation of this process, a polyamic acid bearing anhydride termination is prepared by reacting an excess of a dianhydride with a diamine. The product of this reaction when reacted with an aminoalkylenetrialkoxysilane provides an alkoxysilane bearing oligomeric polyamic acid. The latter product yields an imide modified silica network when subjected to acid catalyzed hydrolysis and condensation with tetraalkoxysilane.
    • 通过使芳族或脂族二酸酐和氨基烷基三烷氧基硅烷或氨基芳基三烷氧基硅烷反应,或使芳族或脂族二酐与二胺反应形成与氨基亚烷基三烷氧基硅烷反应的酰胺酸形成含有酰胺酸或其衍生物的烷氧基硅烷。 通过使含有烷氧基硅烷的烷氧基硅烷与烷氧基硅烷(优选四烷氧基硅烷)和含有环氧基的硅烷偶联絮凝剂在含有水解和缩合的酸催化溶胶 - 凝胶方法中反应形成薄的硬保护的二氧化硅玻璃网,其提供酰胺/酯 改性二氧化硅网络。 在该方法的变化中,通过使过量的二酐与二胺反应来制备含有聚酰胺酸的酸酐终止物。 当与氨基亚烷基三烷氧基硅烷反应时,该反应的产物提供了具有低聚聚酰胺酸的烷氧基硅烷。 当与四烷氧基硅烷进行酸催化水解和缩合时,后者产生酰亚胺改性的二氧化硅网络。