http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1512707-A2

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classificationIPCInventive http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-48
filingDate 2004-07-03-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0b1e84c2278eef4a4e27f56cca3edf36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c855fb456ac84b9a2e1e7778d2604439
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publicationDate 2005-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-1512707-A2
titleOfInvention Open celled rigid polyurethane foams
abstract a) Polyisocyanaten mit b) Verbindungen mit mindestens zwei mit Isocyanatgruppen reaktivennWasserstoffatomen in Anwesenheit von c) Katalysatoren, d) Treibmitteln, nwobei als Verbindungen mit mindestens zwei mit Isocyanatgruppen reaktiven Wasserstoffatomennb) eine Mischung mit einer Funktionalität von mindestens 3,5, enthaltendn bi) mindestens einen Polyetheralkohol mit einer Funktionalität von > 4 undneiner Hydroxylzahl von > 450 mgKOH/g, hergestellt durch Umsetzung vonnH-funktionellen Startsubstanzen mit einer Funktionalität von mindestens 5nund gegebenenfalls H-funktionellen Startsubstanzen mit einer Funktionalitätnvon höchstens 3 mit Alkylenoxiden, bii) mindestens einen Polyetheralkohol mit Funktionalität von 3 bis 4 undneiner Hydroxylzahl von > 350 mgKOH/g, hergestellt durch Umsetzung vonnH-funktionellen Startsubstanzen mit Alkylenoxiden, biii) mindestens einen Polyetheralkohol mit einer Funktionalität von 3 bis 4 undneiner Hydroxylzahl von 100 bis 200 mgKOH/g, hergestellt durch UmsetzungnH-funktionellen Startsubstanzen mit Alkylenoxiden; neingesetzt wird.The invention relates to a process for the preparation of open-cell rigid polyurethane foams by reacting a) polyisocyanates with b) compounds having at least two isocyanate-reactive hydrogen atoms in the presence of c) catalysts, d) propellants, wherein as compounds having at least two isocyanate-reactive hydrogen atoms b) a mixture having a functionality of at least 3.5, comprising bi) at least one polyether alcohol having a functionality of> 4 and a hydroxyl number of> 450 mgKOH / g, prepared by reacting H-functional starter substances having a functionality of at least 5 and optionally H-functional starter substances having a functionality of at most 3 with alkylene oxides, bii) at least one polyether alcohol having a functionality of from 3 to 4 and a hydroxyl number of> 350 mgKOH / g, prepared by reacting H-functional starter substances with alkylene oxides, biii) at least one polyether alcohol having a functionality of 3 to 4 and a hydroxyl number of 100 to 200 mgKOH / g, prepared by reacting H-functional starter substances with alkylene oxides; is used.
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