POLYBUTENE-1-BASED FOAM AND ITS PRODUCTION

PURPOSE:To obtain the subject foam, excellent in cushioning properties and flexibility and useful as a heat insulating material, etc., by mixing and melting a polybutene-1-based resin with a specific evaporation type foaming agent at a high temperature under a high pressure, subsequently extruding t...

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Bibliographische Detailangaben
Hauptverfasser:	HAYASHI TAKAHIRO, OBAYASHI TAKESHI, SHIGETANI SHIGERU
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 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:	PURPOSE:To obtain the subject foam, excellent in cushioning properties and flexibility and useful as a heat insulating material, etc., by mixing and melting a polybutene-1-based resin with a specific evaporation type foaming agent at a high temperature under a high pressure, subsequently extruding the melt under atmospheric pressure and releasing the pressure. CONSTITUTION:A polybutene-1-based resin and an evaporation type foaming agent such as propane (pressed thereinto in an amount of preferably 5-30 pts.wt. based on 100 pts.wt. resin) having 4-7 pts.wt., preferably 5.5-6.5 pts.wt. number of impregnation pts., when impregnated into the polybutene-1-based resin under conditions of 120 deg.C temperature and 10kg/cm G pressure for 60min, are mixed and melted at a high temperature under a high pressure and extruded under atmospheric pressure. The pressure is then released to afford the objective foam. Furthermore, the aforementioned foam has 15-40kg/m density, 0.2-1.5mm average cell diameter and >=10wt.% closed cell ratio.