Method of forming thermoplastic foams using nano-particles to control cell morphology

A process for making closed-cell, alkenyl aromatic polymer foams using nano-particle nucleation agents to control the cell morphology of the resulting foam includes forming a polymer melt at a temperature above the polymer glass transition temperature (for crystal polymers) or the polymer melt point...

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Hauptverfasser: RYND JOSEPH P, BREINDEL RAYMOND M, LOH ROLAND R
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creator RYND JOSEPH P
BREINDEL RAYMOND M
LOH ROLAND R
description A process for making closed-cell, alkenyl aromatic polymer foams using nano-particle nucleation agents to control the cell morphology of the resulting foam includes forming a polymer melt at a temperature above the polymer glass transition temperature (for crystal polymers) or the polymer melt point (for amorphous polymers); incorporating selected nano-particles into the polymer melt; incorporating blowing agents into the polymer melt at an elevated pressure; optionally incorporating other additives, such as flame retardants, into the polymer melt; and extruding the polymer melt under conditions sufficient to produce a foam product having a desired cell morphology, characterized by parameters such as reduced average cell size range and/or increased asymmetry of the cells.
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subjects AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES
METALLURGY
NANOTECHNOLOGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
TECHNICAL SUBJECTS COVERED BY FORMER USPC
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
WORKING-UP
title Method of forming thermoplastic foams using nano-particles to control cell morphology
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