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PROBLEM TO BE SOLVED: To prevent the distortion of a shape by injection-molding a thermoplastic elastomer composition which contains specified components, and has a specified bending elastic modulus and a specified impact strength and is a specified heat sag. SOLUTION: As components of a thermoplast...

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Bibliographische Detailangaben
Hauptverfasser:	HAMANAKA TATSURO, UKAI JUNZO, OSHITA NAOKI, NISHIMURA HIDEO, OYAMA HIROSHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent the distortion of a shape by injection-molding a thermoplastic elastomer composition which contains specified components, and has a specified bending elastic modulus and a specified impact strength and is a specified heat sag. SOLUTION: As components of a thermoplastic elastomer, contained is at least one kind selected from a crystalline polypropylene ethylene block copolymer and a mixture of a crystalline propylene homopolymer and a crystalline propylene-ethylene monopolymer. The elastomer contains ethylene-butene-1 copolymer rubber, contains ethylene-propylene copolymer rubber, and contains talc with the mean particle diameter of 4 μm or less. An injection molded article of the thermoplastic elastomer composition has a bending elastic modulus of 700-1100 Mpa, Izod impact strength at -30 deg.C of 100 J/m or more, or non-break, and a heat sag at 90 deg.C of 10 mm or less. Thus, distortion of the shape is prevented.