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1. (WO2008117759) DIAMINE COMPOUND, POLYAMIC ACID, POLYIMIDE AND LIQUID CRYSTAL ALIGNING AGENT

Pub. No.:    WO/2008/117759    International Application No.:    PCT/JP2008/055311
Publication Date: Fri Oct 03 01:59:59 CEST 2008 International Filing Date: Sat Mar 22 00:59:59 CET 2008
IPC: C07C 217/90
G02F 1/1337
Applicants: NISSAN CHEMICAL INDUSTRIES, LTD.
日産化学工業株式会社
MINAMI, Satoshi
南 悟志
MIKI, Noritoshi
三木 徳俊
GOTO, Kohei
後藤 耕平
HOSAKA, Kazuyoshi
保坂 和義
Inventors: MINAMI, Satoshi
南 悟志
MIKI, Noritoshi
三木 徳俊
GOTO, Kohei
後藤 耕平
HOSAKA, Kazuyoshi
保坂 和義
Title: DIAMINE COMPOUND, POLYAMIC ACID, POLYIMIDE AND LIQUID CRYSTAL ALIGNING AGENT
Abstract:
Disclosed is a novel diamine which has an effect of increasing the pretilt angle of a liquid crystal when used as a raw material for a liquid crystal aligning agent. This diamine enables to vertically align a liquid crystal even when used in a small amount. In addition, this diamine hardly precipitates even when a poor solvent is mixed in a liquid crystal aligning agent solution for improving coatability of the agent. Specifically disclosed is a diamine represented by the following formula (1). (1) (In the formula (1), R1 represents a phenylene or a cyclohexylene; and R2 represents an alkyl group having 3-12 carbon atoms, a fluoroalkyl group having 3-12 carbon atoms, an alkoxy group having 3-12 carbon atoms or a fluoroalkoxy group having 3-12 carbon atoms.)