Title:
POLYIMIDE COMPOSITION
Document Type and Number:
Japanese Patent JP3448997
Kind Code:
B2
Abstract:
PURPOSE: To efficiently obtain a polyimide composition used for an oriented liquid crystal membrane, etc., by conducting the dehydrating ring closure of a polyamide having acid groups obtained from a specific diamino compound and a tetracarboxylic acid dianhydride, with a polyamide having acid groups containing a specific diaminobenzoic acid ester.
CONSTITUTION: This polyimide composition is obtained by blending a polyamide having acid groups prepared by reacting a diamino compound expressed by formula I (A is a divalent organic group) [provided, not containing the structural unit of formula II (R1 is a 1-20C alkyl or an alkoxy; (m) is an integer of 1-20; (n) is an integer of 1-2)] (e.g. 1,3-phenylenediamine) with a tetracarboxylic acid dianhydride expressed by formula III (B is a tetra valent organic group) (e.g. 3,3',4,4'-biphenyltetracarboxylic acid dianhydride) in a solvent (e.g. N-methyl-2- pyrrolidone), with a polyamic acid consisting of 3,5-diaminobenzoic acid ester derivative of the formula II and a tetracarboxylic acid dianhydride of the formula III and conducting the dehydrating ring closure of the mixture to obtain a resin composition consisting of the structural units expressed by formulas IV and V and containing 5-95mol% structural unit of the formula IV.
Inventors:
Shigeru Sugimori
Takashi Kato
Takashi Kato
Application Number:
JP30690794A
Publication Date:
September 22, 2003
Filing Date:
November 16, 1994
Export Citation:
Assignee:
Chisso Corporation
International Classes:
G02F1/1337; C08G73/10; C08L79/08; (IPC1-7): C08G73/10; C08L79/08; G02F1/1337
Domestic Patent References:
| JP812759A |
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