Orientation processing agent for liquid crystal display element

Abstract

Abstract PURPOSE:To increase an oblique orientation angle of liquid crystal molecules and to obtain a highly transparent display element contg. no coloration by using polyimide resin contg. each specified amts. of two specified recurrent units as an orientation agent. CONSTITUTION:An orientation agent for liquid crystal display element consisting of 5-100mol.% recurrent unit expressed by formula I and 95-0mol.% recurrent unit expressed by formula II is used. In formula I, each R<1> and R<2> is same or different 1-6C perfluoroalkyl group; R<3> is a tetracarboxylic acid having an alicyclic ring structure, etc.; each R<4>-R<7> is a halogen atom, etc.; each a-d is 0, 1 or 2; n is zero or 1. In formula II, R<8> is an org. group contg. no perfluoroalkyl group constituting a diamine; R<9> is a tetracarboxylic acid having an alicyclic ring structure, etc. By this constitution, a liquid crystal display element having satisfactorily oriented liquid crystals, extremely high transparency and sufficient stability for a long time is obtd.

Inventors

• 👤 Nobuaki Komasa
• 👤 向當　宣昭
• 👤 Toyohiko Abe
• 👤 豊彦 阿部
• 👤 Yoshihiro Tsuruoka
• 👤 鶴岡　義博

Bibliographic Details