HFO-/water-blown rigid-foam systems

The invention relates to a method for producing polyurethane rigid foams by reacting a) at least one organic polyisocyanate with b) at least one polyol component in the presence of a blowing-agent mixture containing water and halogenated alkenes, wherein the amount of water is at least 1.40 mol/kg p...

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Bibliographic Details
Main Authors LAX, PATRICK, SCHUTTE, MARKUS, GIESKER, CHRISTIANE, KROGMANN, JORG
Format Patent
LanguageEnglish
Published 26.11.2015
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:The invention relates to a method for producing polyurethane rigid foams by reacting a) at least one organic polyisocyanate with b) at least one polyol component in the presence of a blowing-agent mixture containing water and halogenated alkenes, wherein the amount of water is at least 1.40 mol/kg polyol component b) and the amount of halogenated alkene is at most 2.00 mol/kg polyol component b), and to the use of such a blowing-agent mixture to produce corresponding polyurethane rigid foams and to increase the adhesion and to reduce the thermal conductivity of corresponding polyurethane rigid foams. The invention further relates to a polyurethane rigid foam that can be produced by the method according to the invention.
Bibliography:Application Number: AU20120292108