POLYIMIDE COMPOUND AND ITS PRODUCTION

PURPOSE:To obtain the titled compound excellent in heat resistance, mechanical properties, electrical properties, and chemical resistance, by reacting 2,3,5-tricarboxycyclopentaneacetic acid or its anhydride with an aromatic diamine in a solvent. CONSTITUTION:A polyamic acid which is a precursor of...

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Hauptverfasser:	OKA HITOSHI, NAITOU YUUJI, YOSHIDA YOSHINORI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain the titled compound excellent in heat resistance, mechanical properties, electrical properties, and chemical resistance, by reacting 2,3,5-tricarboxycyclopentaneacetic acid or its anhydride with an aromatic diamine in a solvent. CONSTITUTION:A polyamic acid which is a precursor of polyimide is produced by reacting 2,3,5-tricalboxycyclopentaneacetic acid or its anhydride with an aromatic diamine (e.g., 4,4'-diaminodiphenylmethane) in a nitrogen atmosphere in a solvent (e.g., N-methyl-2-pyrrolidone) which dissolves at least one of the above reactants. The obtained polyamic acid is heat-treated to obtain the titled new polyimide compound. The heating temperature is usually 50-300 deg.C. The titled polyimide compound has a structure of the formula, wherein R is a bivalent aromatic group and n is above 2, usually about 10-5,000.