Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1998-05-29
2000-01-11
Hampton-Hightower, P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528128, 528171, 528172, 528173, 528174, 528175, 528179, 528183, 528185, 528188, 528220, 528229, 528350, 4284735, C08G 7310, C08G 6928
Patent
active
060137606
ABSTRACT:
The invention herein relates to a soluble polyimide resin for a liquid crystal alignment layer and the process of preparation of the same, wherein aliphatic tetracarboxylic dianhydride and aromatic diamine having the amide group are used to yield a novel form of a polyimide resin having superior heat-resistance, solubility, transparency, and liquid crystal alignment capacity.
More specifically, the invention herein relates to a novel polyimide resin having excellent heat-resistance, solubility, liquid crystal alignment property, and high pretilt angle, which is prepared by means of jointly using the aromatic diamine, used for the preparation of the conventional polyimide resin, and the aromatic diamine having a long alkyl chain with a substituted amide group, and reacting the same with various types of carboxylic dianhydride.
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patent: 5731404 (1998-03-01), Auman et al.
patent: 5783656 (1998-07-01), Kimura et al.
patent: 5807961 (1998-09-01), Sawai et al.
Choi Kil-Yeong
Ihm Dae-Woo
Jin Moon-Young
Oh Jae-Min
Yi Mi-Hie
Hampton-Hightower P.
Korea Research Institute of Chemical Technology
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