Liquid-Crystal Aligning Agent, Liquid-Crystal Alignment Film Comprising the Same, and Liquid-Crystal Element
申请人:Tsutsui Kimiaki
公开号:US20070224370A1
公开(公告)日:2007-09-27
It is to provide a liquid crystal aligning agent capable of forming a liquid crystal alignment film having favorable electrical characteristics, and excellent in the storage stability and the productivity. A liquid crystal aligning agent comprising at least one member selected from a polyamic acid obtained by polymerization of a diamine component with a tetracarboxylic dianhydride component, and a polyimide obtained by cyclodehydration of the polyamic acid, characterized in that the diamine component contains at least one of diamines represented by the following formula [1]:
H
2
N-A-R—NH
2
[1]
wherein A is a bivalent organic group comprising a benzene ring or an aromatic condensed ring, provided that one or more optional hydrogen atoms in the benzene ring or the aromatic condensed ring may be substituted by a monovalent organic group other than an amino group, and R is a C
1-10
bivalent saturated hydrocarbon group.
本发明旨在提供一种液晶取向剂,能够形成具有良好电学特性、储存稳定性和生产率优异的液晶取向膜。液晶取向剂包括至少一种由二胺组分与四羧酸二酐组分聚合得到的聚酰胺酸和由聚酰胺酸环状脱水得到的聚酰亚胺,其特征在于二胺组分中包含下式[1]所表示的二胺之一:H2N-A-R—NH2[1]其中,A是一个双价的有机基团,包括苯环或芳香环,并且苯环或芳香环中的一个或多个可选氢原子可以被除氨基以外的一价有机基团取代,R是一个C1-10双价饱和碳氢基团。