RIGID FOAMS WITH IMPROVED INSULATION AND PHYSICAL PROPERTIES

Rigid polyurethane foams are produced by reacting an organic polyisocyanate with an amine-initiated polyol produced with an alkylene oxid e comprising propylene oxide, said polyol having a molecular weight of at leas t 149 and a functionality of at least three in the presence of a catalyst, a hydrog...

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Bibliographische Detailangaben
1. Verfasser:	DOERGE, HERMAN P
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:	Rigid polyurethane foams are produced by reacting an organic polyisocyanate with an amine-initiated polyol produced with an alkylene oxid e comprising propylene oxide, said polyol having a molecular weight of at leas t 149 and a functionality of at least three in the presence of a catalyst, a hydrogen--containing fluorocarbon and a minor amount of water at an isocyanate index of from 0.9 to 3.1. These foams are characterized by initial K-factors which are about 0.135 BTU-in./hr.ft.2 .degree.F or less.