VINYL BASED ARTICLES IN CONTACT WITH CHLORO-FLUORO CHEMICALS

This invention pertains to multilayer compositions, articles and process es for preparing and thermoforming said compositions and articles. Multilayer compositions exemplified comprise: (A) a first layer of a polyvinyl chloride composition comprising the specified compounding ingredients and represe...

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Bibliographische Detailangaben
1. Verfasser:	GREENLEE, WILLIAM SAMUEL
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING CHEMISTRY COLD ROOMS COMBINED HEATING AND REFRIGERATION SYSTEMS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHERSUBCLASS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEAT PUMP SYSTEMS HEATING ICE-BOXES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS REFRIGERATION OR COOLING REFRIGERATORS 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 WEAPONS
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Beschreibung
Zusammenfassung:	This invention pertains to multilayer compositions, articles and process es for preparing and thermoforming said compositions and articles. Multilayer compositions exemplified comprise: (A) a first layer of a polyvinyl chloride composition comprising the specified compounding ingredients and represented herein by preferred embodiments; and at least one other layer (B) comprising: a polyvinyl chloride composition together with specified and preferred compounding ingredients and including a heat distortion temperature improving additive, wherein the heat distortion temperature of the dominant phase, preferably a single phase, is at least three degrees celsius higher than said heat distortion temperature of said first layer. Thermoformed articles of the invention are useful for example as inner-liners or door liner panels for referigerators where contact with HCFC chemicals, present in foam insulation, is necessary. Impact resistance is maximized, while chemical resistance and heat deflection temperature are maintained at performance levels acceptable in these applications.