Diaminobenzene derivative, polyimide precursor and polyimide...

Details Diaminobenzene derivative, polyimide precursor and polyimide... Diaminobenzene derivative, polyimide precursor and polyimide...

2007-12-04

2007-12-04

Eyler, Yvonne (Bonnie) (Department: 1621)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C428S001250, C428S001260, C528S324000, C558S418000, C564S347000

Reexamination Certificate

active

10538060

ABSTRACT:
The present invention provides a novel diamine which is especially useful as a material for a resin for a liquid crystal alignment film, a polyimide precursor and a polyimide synthesized by using the diamine, and a treating agent for liquid crystal alignment containing such a polymer, which gives a liquid crystal alignment film having a high pretilt angle of liquid crystal, excellent thermal stability of the pretilt angle and small dependence of the pretilt angle on rubbing pressure.A diaminobenzene derivative represented by the formula (1):wherein X1and X2are cyclic groups, and X3is selected from an alkyl group, an alkoxy group, a fluoroalkyl group, a fluoroalkoxy group, a fluorine atom, a chlorine atom, a bromine atom and a cyano group; a polyimide precursor and a polyimide synthesized by using the diaminobenzene derivative as a part of the material; and a treating agent for liquid crystal alignment containing at least one of the polymers.

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