Verfahren zum Herstellen von Gegenstaenden aus aufgeschaeumten,thermoplastischem Kunststoff

1,144,106. Foamed thermoplastic resins. CONTINENTAL CAN CO. Inc. 21 Nov., 1967 [29 Nov., 1966], No. 52970/67. Headings C3C and C3P. Foamed thermoplastic resins are produced by forming a homogeneous mixture of unexpanded thermoplastic resin particles, a nucleating agent and discrete rupturable capsul...

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Bibliographische Detailangaben
1. Verfasser:	M. TURNER,HOWARD
Format:	Patent
Sprache:	ger
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 MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS 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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Zusammenfassung:	1,144,106. Foamed thermoplastic resins. CONTINENTAL CAN CO. Inc. 21 Nov., 1967 [29 Nov., 1966], No. 52970/67. Headings C3C and C3P. Foamed thermoplastic resins are produced by forming a homogeneous mixture of unexpanded thermoplastic resin particles, a nucleating agent and discrete rupturable capsules which comprise a volatile organic liquid encapsulated within an outer rupturable shell, and simultaneously foaming and extruding the mixture in an extruder at an elevated temperature. The resin may be polystyrene, e.g. a mixture of impact and crystal grades in bead form. The capsules may be formed from polyvinyl alcohol, algin, gelatine and/or sodium caseineate, and may contain an aliphatic hydrocarbon, e.g. hexane. The nucleating agent may be an alkali or alkaline earth metal carbonate, bicarbonate or citrate, e.g. a mixture of sodium bicarbonate and citric acid.