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    • 3. 发明申请
    • Composition for forming liquid crystal film, optically anisotropic film, and production method thereof
    • 用于形成液晶膜的组合物,光学各向异性膜及其制备方法
    • US20070114491A1
    • 2007-05-24
    • US10581747
    • 2004-08-31
    • Zemin ShiTadashi AkamatsuMichio SatoTsuneo Hanada
    • Zemin ShiTadashi AkamatsuMichio SatoTsuneo Hanada
    • C09K19/52C09K19/54C09K19/38
    • C09K19/3852C09K19/406C09K19/408C09K2019/328C09K2219/03Y10T428/10
    • A simple technique for introducing a hybrid alignment or a homeotropic (vertical) alignment into liquid crystal films, which, by their nature, tend to have a horizontal alignment of liquid crystal molecules. The technique does not require special alignment films. A liquid crystal composition for forming a liquid crystal film contains a polymerizable liquid crystal compound and a hydrolysate of an alkoxysilane compound. The hydrolysate of the alkoxysilane compound contains a siloxane oligomer of which degree of polymerization is from 2 to 25. Furthermore, the alkoxysilane compound is a trialkoxysilane compound having a functional group. This liquid crystal film composition can be produced by hydrolyzing an alkoxysilane compound to obtain a hydrolysate and then uniformly mixing the hydrolysate with a polymerizable liquid crystal compound. Alternatively, it can be obtained by uniformly mixing the alkoxysilane compound with the polymerizable liquid crystal compound and subsequently hydrolyzing the alkoxysilane compound in the mixture. One mole of the alkoxysilane compound is preferably hydrolyzed with 0.1d to 2.0d mol of water, given that the number of alkoxyl groups in a molecule of the alkoxysilane compound is d. An optically anisotropic film can be obtained by applying the liquid crystal film composition to a base film, causing the liquid crystal molecules in the composition to align in a nematic alignment, and curing the composition. The alignment of the liquid crystal molecules in the film is preferably a nematic hybrid or nematic homeotropic (vertical) alignment.
    • 用于将混合取向或垂直(垂直)取向引入液晶膜的简单技术,其本质上倾向于具有液晶分子的水平取向。 该技术不需要特殊的取向膜。 用于形成液晶膜的液晶组合物含有可聚合液晶化合物和烷氧基硅烷化合物的水解产物。 烷氧基硅烷化合物的水解物含有聚合度为2〜25的硅氧烷低聚物。此外,烷氧基硅烷化合物为具有官能团的三烷氧基硅烷化合物。 该液晶膜组合物可以通过水解烷氧基硅烷化合物得到水解产物,然后将水解产物与可聚合液晶化合物均匀混合来制备。 或者,可以通过将烷氧基硅烷化合物与可聚合液晶化合物均匀混合,然后水解该混合物中的烷氧基硅烷化合物而获得。 考虑到烷氧基硅烷化合物的分子中的烷氧基数为d,一摩尔烷氧基硅烷化合物优选用0.1d至2.0dmol的水进行水解。 可以通过将液晶膜组合物施加到基膜上,使组合物中的液晶分子以向列取向取向并固化该组合物来获得光学各向异性膜。 膜中液晶分子的取向优选为向列混合或向列垂面(垂直)取向。