JPS6338368B

1. A process for the manufacture of flexible polyurethane foams having a density of from 10 to 80 g/l from organic polyisocyanates, polyols, catalysts, blowing agents, and optionally chain extenders, auxiliaries and additives, wherein a mixture of diphenylmethane diisocyanates and polyphenylene poly...

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Bibliographische Detailangaben
Hauptverfasser:	UORUFUGANGU YAARE, PEETAA UEIRANTO, GERUHARUTO MYURAA
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	1. A process for the manufacture of flexible polyurethane foams having a density of from 10 to 80 g/l from organic polyisocyanates, polyols, catalysts, blowing agents, and optionally chain extenders, auxiliaries and additives, wherein a mixture of diphenylmethane diisocyanates and polyphenylene polymethylene polyisocyanates having a diphenylmethane diisocyanate isomer content of from 55 to 85 percent by weight is used as organic polyisocyanates ; polyester polyols having a molecular weight of from 1,500 to 3,000, a functionality of from 2 to 2.8 and an OH number of from 37.4 to 104.7, or mixtures of such polyester polyols and polyether polyols having a molecular weight of from 2,000 to 7,000, a functionality of 2 to 3 and an OH number of 16 to 84.1, the polyester polyol content being at least 60 percent by weight, based on the total weight of the mixture, are used as polyols ; and water or mixtures of water and low-boiling, optionlly halogenated hydrocarbons are used as blowing agents.