Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1998-08-24
2000-12-19
Sanders, Kriellion
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
A61K 3817
Patent
active
06162893&
ABSTRACT:
The invention herein relates to a soluble polyimide resin having a dialkyl substituent for a liquid alignment layer, wherein aliphatic tetracarboxylic dianhydride and aromatic diamine having a dialkyl substituent are used to yield said soluble polyimide resin which has superior heat-resistance, solubility, transparency, and liquid crystal alignment capacity. According to the present invention, the soluble polyimide polymer having a dialkyl substituent, for a liquid crystal alignment layer, comprising the following a repetitive unit of formula 1: ##STR1## Consequently, the polyimide resin under the present invention not only has superior heat-resistance but also excellent solubility and transparency, which could be applicable as a liquid crystal alignment layer for the TFT-LCD requiring a low temperature processing. Further, the invention has the effects of providing a polyimide resin with superior physical property for heat-resistance structural material, and the monomer therein, in addition to the manufacturing methods thereof.
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Choi Kil-Yeong
Ihm Dae-Woo
Jin Moon-Young
Jung Jin-Tae
Park Jae-Geun
Korea Research Institute of Chemical Technology
Sanders Kriellion
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