POLYURETHANE FOAMS CO-BLOWN WITH A MIXTURE OF A HYDROCARBON AND A HALOGENATED OLEFIN

This invention relates to rigid polyurethane foams which are co-blown with a mixture of a hydrocarbon blowing agent and a halogenated olefin blowing agent. This invention also relates to a process for preparing these rigid polyurethane foams, and to an isocyanate-reactive component containing a poly...

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Bibliographische Detailangaben
1. Verfasser:	SCHILLING, Steven L
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	This invention relates to rigid polyurethane foams which are co-blown with a mixture of a hydrocarbon blowing agent and a halogenated olefin blowing agent. This invention also relates to a process for preparing these rigid polyurethane foams, and to an isocyanate-reactive component containing a polyol blend and the mixture of blowing agents. Phase stable isocyanate-reactive blends are also described. La présente invention concerne des mousses de polyuréthane rigides qui sont conjointement gonflées avec un mélange d'un agent gonflant d'hydrocarbure et d'un agent gonflant d'oléfine halogénée. La présente invention concerne également un procédé de préparation de ces mousses de polyuréthane rigides, et un composant réactif à l'isocyanate contenant un mélange de polyols et le mélange d'agents gonflants. L'invention concerne également des mélanges réactifs à l'isocyanate à phases stables.