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    • 6. 发明授权
    • Anhydrous process for preparation of polyorganosiloxanes
    • 无机硅氧烷制备方法
    • US5239101A
    • 1993-08-24
    • US994582
    • 1992-12-21
    • Gary N. BokermanDavid E. PuckettLarry H. Wood
    • Gary N. BokermanDavid E. PuckettLarry H. Wood
    • C08G77/06C07F7/08C08G77/10C08G77/12C08G77/38
    • C08G77/12C07F7/0874C07F7/0896C08G77/10
    • The present invention is an anhydrous process for preparing organosiloxy end-blocked polyorganosiloxanes from chlorine end-terminated polyorganosiloxanes. The process comprises contacting an anhydrous mixture comprising a chlorine end-terminated polyorganosiloxane and an organodisiloxane with a rearrangement catalyst, where the rearrangement catalyst facilitates a chlorine and organosiloxy exchange between the chlorine end-terminated polyorganosiloxane and the organodisiloxane forming a organochlorosilane as a by-product. The organochlorosilane is continuously removed from the process providing a means by which the chlorine displaced from the chlorine end-terminated polyorganosiloxane can be effectively removed from the organosiloxy end-blocked polyorganosiloxanes in a useable form. The present process is especially useful for the rearrangement of chlorine end-terminated polyorganosiloxanes having one or more hydrogen atoms bonded to silicon to organosiloxy end-blocked polyorganohydrosiloxanes.
    • 本发明是从氯端基聚有机硅氧烷制备有机甲硅烷氧基封端的聚有机硅氧烷的无水方法。 该方法包括将包含氯端基聚有机硅氧烷和有机二硅氧烷的无水混合物与重排催化剂接触,其中重排催化剂促进氯端基聚有机硅氧烷和有机二硅氧烷之间的氯和有机甲硅烷氧交换作为副产物形成有机氯硅烷 。 从该方法中连续除去有机氯代硅烷,提供了从氯端基聚有机硅氧烷中排出的氯可以有效地从有机甲硅烷氧基封端的聚有机硅氧烷中以可用形式除去的方法。 本方法对于将具有一个或多个与硅键合的氢原子的氯端基聚有机硅氧烷重排为有机甲硅烷氧基封端的聚有机氢硅氧烷特别有用。