HEAT-RESISTANT HOLDING CONTAINER USING POLYIMIDE RESIN WHICH CRYSTALLIZES IN MOLD

PROBLEM TO BE SOLVED: To obtain a container excellent in resistance to heat and chemicals by constituting of crystallizable polyimide resin which has repetitive structural units of a specific formula and whose inherent viscosity is in a specific range. SOLUTION: Polyimide resin expressed by a formul...

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Bibliographische Detailangaben
Hauptverfasser:	YOSHIDA IKUNORI, YANAGIHARA KAYAKO, YOSHIMURA MASAJI
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY HANDLING THIN OR FILAMENTARY MATERIAL MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS SEMICONDUCTOR DEVICES STORING THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a container excellent in resistance to heat and chemicals by constituting of crystallizable polyimide resin which has repetitive structural units of a specific formula and whose inherent viscosity is in a specific range. SOLUTION: Polyimide resin expressed by a formula is obtained by dehydration co-condensation of diamine and tetracarboxylic acid dianhydride. A molecular weight of polyimide is in a range of 0.1 to 3.0 dl/g in exponential viscosity, wherein most preferably in a range of 0.4 to 1.0 dl/g. In synthesizing polyimide, a reaction terminal of a molecule is desirably sealed by phthalic anhydride or the like. Thus thermal stability may be remarkably improved. Reaction is especially preferably performed in organic solvent. Usable solvent may include N,N-diamethylformamide, N,N-diethylacetoamide or the like.