STABILIZATION OF POLYURETHANE FOAM POLYOL PREMIXES CONTAINING HALOGENATED OLEFIN BLOWING AGENTS

The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to open-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The foams are characterized by a fine uniform cell structure and...

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Bibliographische Detailangaben
Hauptverfasser:	VANDERPUY, MICHAEL, WILLIAMS, DAVID J
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS 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 CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to open-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, and a catalyst which is an adduct of an amine and an organic acid. L'invention concerne des mousses de polyisocyanurate et de polyuréthane et leurs procédés de préparation. L'invention concerne plus particulièrement des mousses de polyuréthane et de polyisocyanurate à cellules ouvertes et leurs procédés de préparation. Les mousses sont caractérisées par une structure cellulaire fine et uniforme et un effondrement faible ou nul de la mousse. Les mousses sont fabriquées avec une composition de prémélange à base de polyol, qui comprend un mélange d'un agent gonflant à base d'oléfine hydro-halogénée, un polyol, un tensioactif de silicone et un catalyseur qui est un produit d'addition d'une amine et d'un acide organique.