METHODS OF PREPARING RIGID POLYURETHANE FOAMS, AND PRECURSOR COMPOSITIONS THEREFOR

This invention is directed to a process for preparing a rigid polyurethane foam which comprises reacting a polyisocyanate with polyol in the presence of a blowing agent, a polymerization catalyst and a surfactant. The polyol has the fnrmula:wherein R1, R2, and R3 are, each independently, hydrogen, a...

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Bibliographische Detailangaben
Hauptverfasser:	OMAR BADIE SHADID, JOHANNES ELISABETH GERARDUS SPORK, MICHAEL AUGUST PAUL GANSOW
Format:	Patent
Sprache:	eng
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 is directed to a process for preparing a rigid polyurethane foam which comprises reacting a polyisocyanate with polyol in the presence of a blowing agent, a polymerization catalyst and a surfactant. The polyol has the fnrmula:wherein R1, R2, and R3 are, each independently, hydrogen, a C1 - C6 alkyl group, bearing one or more halogen, hydroxyl, optionally substituted phenyl, optionally substituted cycloalkyl, or optionally substituted phenyl ether substituents, n is 1 or 2, and x + y + z is from 3.5 to 6. Rigid polyurethane foams produced by this process show a reduced degree of friability.