Title:
LIQUID CRYSTAL ALIGNMENT AGENT, LIQUID CRYSTAL ALIGNMENT FILM, AND LIQUID CRYSTAL DISPLAY ELEMENT
Document Type and Number:
WIPO Patent Application WO/2021/199974
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: a liquid crystal alignment agent which makes it possible to produce a liquid crystal alignment film having excellent film hardness at low cost; and a liquid crystal display element equipped with the liquid crystal alignment film. Further provided is a liquid crystal alignment agent which makes it possible to produce a liquid crystal alignment film and a liquid crystal display element which are superior in various properties other than film hardness. The liquid crystal alignment agent is characterized by comprising a component (A). Component (A): at least one polymer (A) selected from the group consisting of a (polyimide precursor)-polyurea copolymer having a repeating unit represented by formula (m1) and a repeating unit represented by formula (1) and an imidized polymer of the copolymer, in which at least one of the repeating unit represented by formula (m1) and the repeating unit represented by formula (1) is derived from an aromatic diamine (a) having any one of the structures respectively represented by formulae (S1) to (S2), and the polymer (A) can be produced without using an aliphatic diamine. (The meaning of each of the substituents is as defined in the description.)
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Inventors:
HIRAGA EISHIRO (JP)
Application Number:
PCT/JP2021/009419
Publication Date:
October 07, 2021
Filing Date:
March 10, 2021
Export Citation:
Assignee:
NISSAN CHEMICAL CORP (JP)
International Classes:
G02F1/1337; C08G73/14
Domestic Patent References:
| WO2015033921A1 | 2015-03-12 | |||
| WO2017170841A1 | 2017-10-05 | |||
| WO2014126102A1 | 2014-08-21 |
Foreign References:
| JPH08220542A | 1996-08-30 | |||
| US5252403A | 1993-10-12 |
Attorney, Agent or Firm:
T.S. PARTNERS et al. (JP)
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