PROCESS FOR PREPARING A FLEXIBLE FOAM

A METHOD FOR THE PREPARATION OF FLEXIBLE POLYURETHANE FOAMS BY REACTING A POLYISOCYANATE CONTAINING AT LEAST 85% BY WEIGHT OF 4,4'DIPHENYLMETHANE DIISOCYANATE OR A LIQUID VARIANT THEREOF WITH A POLYOL COMPOSITION COMPRISING AT LEAST ONE POLY (OXYETHYLENE-OXYALKYLENE) POLYOL HAVING AN AVERAGE NO...

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Hauptverfasser:	HUYGENS ERIC, ELING BEREND
Format:	Patent
Sprache:	eng
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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Zusammenfassung:	A METHOD FOR THE PREPARATION OF FLEXIBLE POLYURETHANE FOAMS BY REACTING A POLYISOCYANATE CONTAINING AT LEAST 85% BY WEIGHT OF 4,4'DIPHENYLMETHANE DIISOCYANATE OR A LIQUID VARIANT THEREOF WITH A POLYOL COMPOSITION COMPRISING AT LEAST ONE POLY (OXYETHYLENE-OXYALKYLENE) POLYOL HAVING AN AVERAGE NOMINAL HYDROXYL FUNCTIONALITY OF FROM 2 TO 6, A NUMBER AVERAGE HYDROXYL EQUIVALENT WEIGHT OF FROM 1000 TO 3000, AND AN AVERAGE OXYETHYLENE CONTENT OF FROM 50 TO 85% BY WEIGHT AND WITH WATER IN THE PRESENCE OF A CATALYTICALLY EFFECTIVE AMOUNT OF AN ALKALI OR ALKALINE EARTH METAL CARBOXYLATE SALT.