Liquid crystal aligning agent and method for forming liquid crystal alignment films

A technology of liquid crystal alignment agent and polymer, which is applied in the directions of instruments, optics, nonlinear optics, etc., and can solve problems such as thermal decomposition of side chains that cannot be ruled out
CN101990650AActive Publication Date: 2011-03-23JSR CORPORATIOON
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JSR CORPORATIOON
Publication Date
2011-03-23

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Abstract

A liquid crystal aligning agent containing at least one polymer selected from the group consisting of polyamic acids, polyimides, and polyamic acid esters, said polymer having a group represented by general formula (1) or (2). In general formula (1), R1 and R2 are each independently hydrogen or a monovalent organic group, or R1 and R2 may be bonded to each other to form a ring; R3 is fluoro or cyano; a is an integer of 0 to 4; and * is a free valency, while in general formula (2), R4 is C1-40 alkyl or a C3-40 monovalent organic group containing an alicyclic group, with the proviso that the hydrogen atoms of the alkyl may be partially or completely replaced by fluorine atoms; R5 is fluoro or cyano; b is an integer of 0 to 4; and * is a free valency.
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Description

technical field

[0001] The present invention relates to a liquid crystal aligning agent, a method for producing a liquid crystal aligning film, and a liquid crystal display element. Background technique

[0002] At present, there are known liquid crystal display elements having liquid crystal cells such as TN (twisted nematic) type, STN (super twisted nematic) type, and IPS (in-plane switching) type. These liquid crystal display elements will have a positive dielectric The anisotropic nematic liquid crystal forms a sandwich structure with a substrate with a transparent electrode having a liquid crystal alignment film. As required, the long axis of the liquid crystal molecule is continuously twisted by 0 to 360° between the substrates (Japanese Patent Laid-Open Show 56- 91277 and Japanese Patent Application Laid-Open No. 1-120528).

[0003] In such a liquid crystal cell, since the liquid crystal molecules are aligned in a predetermined direction with respect to the substrate...

Claims

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