Production of rigid foams based on isocyanate
AssigneeBASF SE
InventorsHolger Seifert, Renate Hempel, Gottfried Knorr, Udo Rotermund
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Abstract
In a process for producing rigid foams based on isocyanate, the blowing agent used is a mixture of at least one low-boiling hydrocarbon having from 3 to 7 carbon atoms, low molecular weight monohydric alcohols containing primary or secondary hydroxyl groups and having from 1 to 4 carbon atoms, and, if desired, the carbon dioxide formed from water and isocyanate. The rigid foams can be used as insulation material.
Claims12
A blowing agent mixture for producing rigid foams based on isocyanate comprising a mixture of at least one low-boiling hydrocarbon having from 3 to 7 carbon atoms and a low molecular weight monohydric alcohol containing primary and secondary hydroxyl groups and having from 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.