PROPYLENE-BASED RESIN COMPOSITION AND ITS MOLDING

PROBLEM TO BE SOLVED: To provide a propylene-based resin composition which has an excellent balance between mechanical properties and coatability, particularly electroconductivity enabling electrostatic primerless coating with a water-based coating and a molding using the composition. SOLUTION: The...

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Hauptverfasser:	YASUNAGA KENICHI, MASUDA KENJI, UBOSHI RYOJI, ZANKA YUKITO, NAGAI TAKAYUKI, ISOBE YASUMITSU, NAKAYAMA KOICHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a propylene-based resin composition which has an excellent balance between mechanical properties and coatability, particularly electroconductivity enabling electrostatic primerless coating with a water-based coating and a molding using the composition. SOLUTION: The propylene-based resin composition comprises 100 pts.wt. of (A) a propylene-based resin composition containing (a) a propylene-ethylene block copolymer, (b) an ethylenic elastomer, (c) talc and, as necessary, (d) a styrenic hydrogenated block polymer rubber. (B) 1-15 pts.wt. of a polyhydroxy polyolefin and (C) 1-10 pts.wt. of an electroconductive carbon. The volume specific resistance of the propylene-based resin composition is ≤108Ωcm. The contact angle of a waterdrop to the surface of a molding molded from the propylene-based resin composition is 65-80°. The propylene-based resin composition is for use in electrostatic coating and has an excellent balance among electroconductivity, coatability and impact strength. The molding obtained from the composition is presented. COPYRIGHT: (C)2005,JPO&NCIPI