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    • 16. 发明授权
    • Retardation film, use of said retardation film, and novel modified polymer
    • 延迟膜,使用所述延迟膜和新型改性聚合物
    • US07722935B2
    • 2010-05-25
    • US11579921
    • 2005-06-14
    • Seiji UmemotoYutaka OhmoriMichie SakamotoTakashi KamijouJunzou Miyazaki
    • Seiji UmemotoYutaka OhmoriMichie SakamotoTakashi KamijouJunzou Miyazaki
    • G02F1/13363
    • C08F8/14C08J5/18C08J2323/08G02F1/13363G02F2001/133637H01J2211/44Y10T428/10Y10T428/105C08F16/06
    • A modified polymer which can serve as a raw material of novel reverse dispersion retardation films is provided, the modified polymer having no need to select a plurality of monomers or polymers in order to realize a reverse dispersion and having no problems concerning glass transition temperature or the like in drawing treatment. A polymer having a polyol skeleton as its main chain is caused to react with a compound for modification such as an aromatic carboxylic acid hydride. Through this reaction, a modified polymer in which a chemical group such as an aromatic carbonyl group is bonded to an oxygen atom in a side chain of the polyol skeleton is prepared. For example, polyvinyl alcohols and benzoyl chloride can be used as the polymer and the compound for modification, respectively. The chemical group may be a benzoyl group. When this modified polymer is formed into a film and then subjected to drawing treatment, a retardation film which exhibits a reverse wavelength dispersion characteristic can be obtained.
    • 可以提供可用作新型反分散延迟膜的原料的改性聚合物,为了实现反向分散而不需要选择多种单体或聚合物,改性聚合物不需要玻璃化转变温度或 像画画处理。 使以多元醇骨架为主链的聚合物与芳香族羧酸氢化物等改性化合物反应。 通过该反应,制备其中诸如芳族羰基的化学基团与多元醇骨架的侧链中的氧原子结合的改性聚合物。 例如,聚乙烯醇和苯甲酰氯可以分别用作聚合物和用于改性的化合物。 化学基团可以是苯甲酰基。 当将该改性聚合物形成膜然后进行拉伸处理时,可以获得呈现反向波长色散特性的延迟膜。