LIQUID CRYSTAL ALIGNMENT AGENT, LIQUID CRYSTAL ALIGNMENT FILM, LIQUID CRYSTAL DISPLAY ELEMENT PRODUCTION METHOD, AND LIQUID CRYSTAL DISPLAY ELEMENT

WIPO Patent Application WO/2023/286735

A1

Provided is a liquid crystal alignment agent that is used to obtain a liquid crystal alignment film having excellent resistance to AC image persistence, low pre-tilt angle characteristics, and a high voltage holding rate.　This liquid crystal alignment agent is characterized by containing component (A) and component (B). Component (A): At least one polymer (A) selected from the group consisting of polyimide precursors having at least 60 mol% of a repeating unit represented by formula (1) with respect to 1 mol of all repeating units in the polymer, and polyimides that are imidized products of the polyimide precursors. Component (B): At least one polymer (B) selected from the group consisting of: polyimide precursors that are each a reaction product between a tetracarbonic acid derivative component containing at least 5 mol% of a tetracarboxylic dianhydride represented by formula (Tf) with respect to the all tetracarbonic acid derivative components, and a diamine component containing a diamine represented by formula (dn); and polyimides that are imidized products of the polyimide precursors. (In the formulae, the definition of each symbol is as described in the description.)

NAKAI TAKASHI (JP)
TOMOE KOJI (CN)
BEPPU KOICHIRO (CN)

PCT/JP2022/027256

January 19, 2023

July 11, 2022

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NISSAN CHEMICAL CORP (JP)

G02F1/1337; C08G73/10

WO2018062440A1

2018-04-05

JP2016224415A

2016-12-28

T.S. PARTNERS et al. (JP)

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