STYRENIC RESIN COMPOSITION FOR MOLDED ITEM HAVING EXCELLENT DELUSTERED APPEARANCE, MOLDING THEREFROM, AND PREPARATION THEREOF

PURPOSE:To prepare a styrenic resin compsn. which gives a molded item excellent in the glare proof properties and mechanical strengths at a high mass- productivity without requiring any secondary heat treatment or delustered mold in injection molding process by compounding a styrenic resin with fine...

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Bibliographische Detailangaben
Hauptverfasser:	ITO YASUTARO, KAWANAMI SEIICHI, YASUNAKA YUJI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	PURPOSE:To prepare a styrenic resin compsn. which gives a molded item excellent in the glare proof properties and mechanical strengths at a high mass- productivity without requiring any secondary heat treatment or delustered mold in injection molding process by compounding a styrenic resin with fine polymer particles. CONSTITUTION:100 pts.wt. styrenic resin is compounded with 1-20 pts.wt. fine polymer particles having a particle diameter of 1-40mum, pref. 1-25mum, and a mean particle diameter of 3-15mum, pref. 3-10mum, to give an injection molding resin compsn. As the fine polymer particles, fine particles of a crosslinked polystyrene, a crosslinked methacrylate ester polymer, or a methacylate ester polymer having a degree of polymn. of 5000 or higher, pref. 8000 or higher, are used. By injection molding the resin compsn. with a mold not delustered, a delustered molded item is obtd.