Title:
LIQUID CRYSTAL ALIGNMENT AGENT, LIQUID CRYSTAL ALIGNMENT FILM, AND LIQUID CRYSTAL DISPLAY ELEMENT USING SAME
Document Type and Number:
WIPO Patent Application WO/2015/050133
Kind Code:
A1
Abstract:
Provided are: a liquid crystal alignment agent having excellent liquid crystal alignment properties and excellent alignment stability, whereby charge accumulation due to asymmetrization of positive and negative voltages during alternating-current driving can be suppressed, and accumulated charge is rapidly relieved; a liquid crystal alignment film; and a liquid crystal display element using the same A liquid crystal alignment agent containing: a polyamic acid obtained by reacting a tetracarboxylic acid dianhydride component containing pyromellitic dianhydride, and a diamine component containing a diamine represented by formula (1) and at least one diamine selected from the group consisting of diamines represented by formula (2) and formula (3); and at least one type of polymer selected from the group consisting of imidized polymers of the polyamic acid. (In formula (2), A1 represents a divalent organic group containing a C1-10 straight-chain alkylene group; and R1 and R2 each independently represent a hydrogen atom or a C1-4 alkyl group. In formula (3), A2 represents a single bond, -O-, -S-, -NR6-, an ester bond, an amide bond, a thioester bond, a urea bond, a carbonate bond, or a carbamate bond; R6 represents a hydrogen atom, a methyl group, or a t-butoxycarbonyl group; R3 represents a C1-10 straight-chain alkylene group; and R4 and R5 each independently represent a hydrogen atom or a C1-4 alkyl group.)
Inventors:
ISHII HIDENORI (JP)
TOMOE KOJI (JP)
SATO NATSUKI (JP)
TOMOE KOJI (JP)
SATO NATSUKI (JP)
Application Number:
PCT/JP2014/076148
Publication Date:
April 09, 2015
Filing Date:
September 30, 2014
Export Citation:
Assignee:
NISSAN CHEMICAL IND LTD (JP)
International Classes:
G02F1/1337; C08G73/10
Domestic Patent References:
| WO2012133829A1 | 2012-10-04 |
Foreign References:
| JP2014098887A | 2014-05-29 | |||
| JP2014132326A | 2014-07-17 | |||
| JP2012173514A | 2012-09-10 |
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
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