The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 1994
Filed:
Aug. 07, 1992
Makoto Mishina, Funabashi, JP;
Toyohiko Abe, Funabashi, JP;
Nissan Chemical Industries Ltd., Tokyo, JP;
Abstract
The present invention relates to an alignment treating agent for a liquid crystal cell, which comprises an organic solvent-soluble polyimide resin comprising a tetracarboxylic acid and a diamine, at least 10 mol % of the diamine having a bivalent organic group selected from the group consisting of: ##STR1## The aligned film for a liquid crystal using the solvent-soluble polyimide resin of the present invention does not require a heat treatment at a high temperature at the time of forming a resin film and enables to use a substrate poor in heat-resistance, and alignment properties such as a tilt angle and a voltage maintenance of the aligned film are not deteriorated even after durability test at a high temperature.