PROCESS FOR PRODUCING EXPANDABLE THERMOPLASTIC BEADS WITH IMPROVED EXPANDABILITY

Preparing cavities containing expandable thermoplastic polymer particles, comprises (i) extruding a propellant containing polymer melt comprising (in wt.%, based on the propellant containing polymer melt) nucleating agent (0.1-5), propellant (1-10) remaining in the polymer particles, and co-propella...

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Bibliographische Detailangaben
Hauptverfasser:	RUCKDAESCHEL, HOLGER, HAHN, KLAUS, SCHIPS, CARSTEN, ASMANN, JENS, HOFMANN, MAXIMILIAN
Format:	Patent
Sprache:	eng ; fre ; 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 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:	Preparing cavities containing expandable thermoplastic polymer particles, comprises (i) extruding a propellant containing polymer melt comprising (in wt.%, based on the propellant containing polymer melt) nucleating agent (0.1-5), propellant (1-10) remaining in the polymer particles, and co-propellant (0.01-5 wt.%) forming cavities, through a die plate, and (ii) granulating it in a liquid filled chamber at a pressure of 1.5-15 bars. An independent claim is also included for cavities containing expandable thermoplastic polymer particles with an average diameter of 0.1-50 mm, obtainable by the above method.