STYRENIC RESIN FOAM AND ITS PREPARATION

PROBLEM TO BE SOLVED: To obtain a styrenic resin foam having a high expansion ratio and excellent thickness and the provide a process for preparing the same using carbon dioxide as a blowing agent. SOLUTION: There is provided a process for preparing an extruded foam of a styrenic resin using carbon...

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Bibliographische Detailangaben
Hauptverfasser:	FUTAMURA NAOYUKI, AKUSAWA TERUYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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 WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a styrenic resin foam having a high expansion ratio and excellent thickness and the provide a process for preparing the same using carbon dioxide as a blowing agent. SOLUTION: There is provided a process for preparing an extruded foam of a styrenic resin using carbon dioxide as a blowing agent, where, as the styrenic resin as a starting material is employed a sytrenic resin having a melt flow rate of X (g/10 min) and a melt tension of Y (g.f), X and Y satisfying the relation represented by the equation: Y>-0.65 X+11.6 (provided that 2