Title:
LIQUID CRYSTAL ALIGNMENT AGENT, LIQUID CRYSTAL ALIGNMENT FILM, AND LIQUID CRYSTAL DISPLAY ELEMENT
Document Type and Number:
WIPO Patent Application WO/2021/177080
Kind Code:
A1
Abstract:
Provided is a liquid crystal alignment agent that is suitable for use in photoalignment techniques and makes it possible to obtain a liquid crystal display element which exhibits superior liquid crystal alignment properties and improved contrast, in which in-plane variations in brightness are suppressed when displaying black. Specifically provided is a liquid crystal alignment agent containing a polymer (A) that is an imidized polymer of a polyimide precursor including a repeating unit expressed by formula (0) and a repeating unit expressed by formula (1), wherein the degree of imidization of the imidized polymer is 80-95%. (In the formula, X represents a quadrivalent organic group represented by formula (g), Y represents a divalent organic group derived from an aromatic diamine that satisfies condition (1) and condition (2), Y1 represents a divalent organic group derived from an aromatic diamine (d1) that satisfies condition (1) and condition (3), and R and Z each independently represent a hydrogen atom or an alkyl group having 1-6 carbon atoms. In formula (0) and formula (1), the X moities may be the same or different).
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Inventors:
ISHIKAWA KAZUNORI (KR)
SUGIYAMA TAKAAKI (JP)
KONISHI REIKU (JP)
FUKUDA IPPEI (JP)
SUGIYAMA TAKAAKI (JP)
KONISHI REIKU (JP)
FUKUDA IPPEI (JP)
Application Number:
PCT/JP2021/006672
Publication Date:
September 10, 2021
Filing Date:
February 22, 2021
Export Citation:
Assignee:
NISSAN CHEMICAL CORP (JP)
International Classes:
G02F1/1337; C08G73/10
Domestic Patent References:
| WO2018030489A1 | 2018-02-15 | |||
| WO2008062877A1 | 2008-05-29 | |||
| WO2020040089A1 | 2020-02-27 |
Foreign References:
| US20160122653A1 | 2016-05-05 | |||
| US20150353829A1 | 2015-12-10 |
Attorney, Agent or Firm:
T.S. PARTNERS et al. (JP)
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