Copolymères thermostables séquences de structure (bloc imide-amide)-(bloc urée-siloxane
申请人:RHONE-POULENC CHIMIE
公开号:EP0294302B1
公开(公告)日:1991-12-11
Poly(amide-imides) aromatiques linéaires fonctionnalisés en bout de chaînes par des groupements comprenant un reste à fonction maléimide latente, procédé pour leur préparation et leur emploi pour notamment préparer des polymères réticulés
申请人:CIBA-GEIGY AG
公开号:EP0408473B1
公开(公告)日:1993-08-11
LIQUID CRYSTAL ALIGNMENT AGENT, LIQUID CRYSTAL ALIGNMENT FILM, AND LIQUID CRYSTAL DISPLAY ELEMENT
申请人:Chi Mei Corporation
公开号:US20150329781A1
公开(公告)日:2015-11-19
A liquid crystal alignment agent having both good ultraviolet reliability and low ion density, a liquid crystal alignment film formed by the liquid crystal alignment agent, and a liquid crystal display element having the liquid crystal alignment film are provided. The liquid crystal alignment agent includes a polymer composition (A) and a solvent (B). The polymer composition (A) is obtained by reacting a mixture. The mixture includes a carboxylic anhydride component (a) and a diamine component (b). The carboxylic anhydride component (a) includes a tetracarboxylic dianhydride compound (a-1) and a tricarboxylic anhydride compound (a-2). The diamine component (b) includes a diamine compound (b-1) represented by formula (I).