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    • 33. 发明申请
    • ALIGNING AGENT FOR LIQUID CRYSTAL
    • 液晶代号
    • WO1996025688A1
    • 1996-08-22
    • PCT/JP1996000283
    • 1996-02-09
    • NISSAN CHEMICAL INDUSTRIES, LTD.MISHINA, MakotoSATO, TerumiSAWAHATA, KiyoshiTANAKA, AtsukoFUKURO, Hiroyoshi
    • NISSAN CHEMICAL INDUSTRIES, LTD.
    • G02F01/1337
    • G02F1/133723
    • An aligning agent for a liquid crystal to be used in the formation of a liquid-crystal alignment film prepared by applying the agent on a substrate having a transparent electrode, followed by firing and surface rubbing, characterized by comprising a precursor of a polyimide comprising repeating units represented by general formula [I], and a solvent-soluble polyimide resin comprising repeating units represented by general formula [II], at least 1 % by mole of R4 in the polyimide represented by general formula [II] being constituted by a divalent organic group constituting a diamine having a long-chain alkyl or fluorine-containing alkyl group with 6 or more carbon atoms, 1 to 80 % by weight of the whole polymer being accounted for by the polyimide represented by general formula [II], wherein R1 and R3 represent each a tetravalent group constituting a tetracarboxylic acid and a derivative thereof; R2 and R4 represent each a divalent organic group constituting a diamine; and m and k are each a positive integer.
    • 一种用于形成液晶取向膜的液晶取向剂,该液晶取向膜通过将该试剂涂布在具有透明电极的基底上,随后进行焙烧和表面摩擦而制备,其特征在于包括聚酰亚胺的前体,其包含重复 由通式[I]表示的单元和包含由通式[II]表示的重复单元的溶剂可溶性聚酰亚胺树脂,由通式[II]表示的聚酰亚胺中至少1摩尔%的R 4由二价 构成具有6个以上碳原子的长链烷基或含氟烷基的二胺的有机基团,全部聚合物的1〜80重量%由通式[II]表示的聚酰亚胺构成,其中R1 R 3表示构成四羧酸的四价基团及其衍生物; R2和R4各自表示构成二胺的二价有机基团; m和k分别为正整数。