Liquid-crystalline polyorganosiloxanes containing (meth) acryloxy groups
    1.
    发明授权
    Liquid-crystalline polyorganosiloxanes containing (meth) acryloxy groups 失效
    含有(甲基)丙烯酸树脂的液晶聚氨酯硅氧烷

    公开(公告)号:US5211877A

    公开(公告)日:1993-05-18

    申请号:US401261

    申请日:1989-08-31

    摘要: The present invention relates to liquid-crystalline compounds and to a process for preparing liquid-crystalline polyorganosiloxanes having methacryloxy and/or acryloxy groups by the reaction of organosiloxanes having hydrogen atoms bonded directly to silicon atoms and/or organosilanes which can be condensed to form organosiloxanes having hydrogen atoms bonded directly to silicon atoms, with alkenes and/or alkynes having mesogenic groups, which comprises reacting in a first step the organosiloxanes with an alkene and/or alkyne having at least one non-enolic hydroxyl group protected by a protective group, and in a second step the protective group is removed and the hydroxyl group which is now free is esterified with (meth)acrylic acid, esters, anhydrides and/or halides thereof and thereafter optionally condensing the organosilanes to organosiloxanes.

    摘要翻译: 本发明涉及液晶化合物以及具有甲基丙烯酰氧基和/或丙烯酰氧基的液晶聚有机硅氧烷的方法,该有机硅氧烷具有直接键合在硅原子上的氢原子的有机硅氧烷和/或可以缩合形成有机硅氧烷的有机硅烷 具有与硅原子直接键合的氢原子和具有介晶基团的烯烃和/或炔烃,其包括在第一步骤中使有机硅氧烷与具有被保护基保护的至少一个非烯醇羟基的烯烃和/或炔烃反应, 并且在第二步中,除去保护基,并且现在游离的羟基用(甲基)丙烯酸,酯,酸酐和/或卤化物酯化,然后任选地将有机硅烷缩合成有机硅氧烷。