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43 条记录 (耗时 0.025 秒)

    Optical elements based on liquid-crystalline substances with no birefringence in a non-perpendicular direction and a process for their preparation
    8.
    发明授权
    Optical elements based on liquid-crystalline substances with no birefringence in a non-perpendicular direction and a process for their preparation 失效
    基于在非垂直方向上没有双折射的液晶物质的光学元件及其制备方法

    公开(公告)号：US5359439A

    公开(公告)日：1994-10-25

    申请号：US11587

    申请日：1993-02-01

    申请人： Alfred Miller ,  Horst Leigeber ,  Franz-Heinrich Kreuzer

    发明人： Alfred Miller ,  Horst Leigeber ,  Franz-Heinrich Kreuzer

    IPC分类号： G02F1/1337 ,  G02B5/30 ,  G02F1/1333 ,  G02F1/137 ,  G02F1/13

    CPC分类号： G02F1/133365 ,  G02B5/3016 ,  G02F1/1337

    摘要： The invention relates to optical elements based on liquid-crystalline substances, and to a process for the production thereof. The optical elements based on liquid-crystalline substances are ones which exhibit no birefringence in a defined direction of incidence, optical elements in which no birefringence occurs perpendicularly to the surface being excepted. The process for preparing the optical elements comprises illuminating a liquid-crystalline substance with unpolarized light of suitable wavelength at a defined angle in such a way that, after illumination, the director of this substance is aligned parallel to the direction of the illuminating light on passing through said substance.

    摘要翻译： 本发明涉及基于液晶物质的光学元件及其生产方法。 基于液晶物质的光学元件是在确定的入射方向上不显示双折射的光学元件，其中不存在垂直于表面的双折射的光学元件除外。 制备光学元件的方法包括用限定角度的合适波长的非偏振光照射液晶物质，使得在照射之后，该物质的导向体与经过的照明光的方向平行排列 通过所述物质。

    Dimethylsilyl-substituted benzoyl chlorides and a process for preparing the same
    9.
    发明授权
    Dimethylsilyl-substituted benzoyl chlorides and a process for preparing the same 失效
    二甲基甲硅烷基取代的苯甲酰氯及其制备方法

    公开(公告)号：US4914221A

    公开(公告)日：1990-04-03

    申请号：US229188

    申请日：1988-08-08

    申请人： Peter-Paul Winkler ,  Franz-Heinrich Kreuzer

    发明人： Peter-Paul Winkler ,  Franz-Heinrich Kreuzer

    IPC分类号： C07F7/12 ,  C07F7/08

    CPC分类号： C07F7/0896

    摘要： The invention relates to dimethylsilyl-substituted benzoyl chlorides and a process for preparing the same, which comprises reacting a dihaloaromatic compound with dimethylchlorosilane and magnesium by the Grignard method to form halophenyldimethylsilanes, then reacting the halophenyldimethylsilanes with magnesium in the presence of carbon dioxide to form the corresponding dimethylsilyl-substituted benzoic acids, and thereafter reacting the dimethylsilyl-substituted benzoic acids with a halogenating agent, such as thionyl chloride, to form dimethylsilyl-substituted benzoyl chlorides.

    摘要翻译： 本发明涉及二甲基甲硅烷基取代的苯甲酰氯及其制备方法，其包括通过格利雅法将二卤代芳族化合物与二甲基氯硅烷和镁反应形成卤代苯基二甲基硅烷，然后在二氧化碳存在下使卤代苯基二甲基硅烷与镁反应形成 然后使二甲基甲硅烷基取代的苯甲酸与卤化剂如亚硫酰氯反应，形成二甲基甲硅烷基取代的苯甲酰氯。