Material for liquid-crystal alignment film, liquid-crystal display element, process for its production and liquid-crystal display unit

A material for a liquid-crystal alignment film which comprises as a first polyamide a C3 to C10 alkyl ester of a polyamic acid whose acid anhydride residual group is any of: 1 and as a second polyamide a C3 to C10 alkyl ester of a polyamic acid whose acid anhydride residual group is: 2 is provided....

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Bibliographic Details
Main Authors Kikawa, Haruhiko, Katsumura, Nobuhito, Inoue, Takashi, Yamada, Masahiro, Koike, Yasuo, Fukuoka, Nobuhiko, Terao, Hiromu
Format Patent
LanguageEnglish
Published 12.06.2003
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Summary:A material for a liquid-crystal alignment film which comprises as a first polyamide a C3 to C10 alkyl ester of a polyamic acid whose acid anhydride residual group is any of: 1 and as a second polyamide a C3 to C10 alkyl ester of a polyamic acid whose acid anhydride residual group is: 2 is provided. The use of this material materializes a liquid-crystal alignment film having a high pre-tilt angle of molecules to the substrate, and having superiority in respect of electrical properties such as voltage holding ratio and residual DC voltage, adherence to substrates, printability, and step-covering properties.