Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1999-05-07
2000-04-25
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, 528351, C08G 7310, C08G 6926
Patent
active
060545542
ABSTRACT:
The invention herein relates to a novel soluble polyimide resin comprising polyalicyclic structures and the process of preparation of the same, wherein aromatic tetracarboxylic dianhydride and novel aromatic diamine having an polyalicyclic group with various structures are used to yield a novel form of a polyimide resin, which has superior heat-resistance, solubility, and transparency.
More specifically, the invention herein relates to a novel polyimide resin having excellent heat-resistance and solubility, which is prepared by means of reacting diamine monomers having a novel chemical structure with various types of aromatic carboxilic dianhydrides, in stead of aromatic diamine used for the preparation of the conventional polyimide resin. As a result, the polymers so obtained had the glass transition temperature of 260.degree. C..about.410.degree. C. and showed a increase in solubility in proportion to the increase in a number of the aromatic rings between two phenyl groups. Further, the polymers herein showed superior solubility at room temperature in various types of organic solvents, e.g., m-cresol, N-methylpyrrolidone or dimethylacetamide.
REFERENCES:
patent: 5466732 (1995-11-01), Tomioka et al.
patent: 5554684 (1996-09-01), Choi et al.
patent: 5604041 (1997-02-01), Choi
Choi Kil Yeong
Huang Wenxi
Yi Mi Hie
Hampton-Hightower P.
Korea Research Institute of Chemical Technology
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