Dialkoxy-phosphonyl-N-alkyl-formic acid amides

Abstract

The present invention relates to a process for the preparation of polyurethane foams capable of being flame laminated and high frequency welded, comprising reacting: (a) polyisocyanate, (b) a compound having a molecular weight of from 400 to 10,000 containing at least two isocyanate-reactive hydrogen atoms and (c) a dialkoxy-phosphonyl-N-alkyl-formic acid amide of the formula: ##STR1## wherein m represents an integer of from 1 to 3, n represents an integer of from 0 to 8, X represents halogen, hydrogen, C.sub.1 to C.sub.6 alkyl, -OR, or ##STR2## R represents C.sub.1 to C.sub.6 alkyl, R.sub.1 represents hydrogen, C.sub.1 to C.sub.10 alkyl, C.sub.1 to C.sub.10 alkylene, C.sub.6 to C.sub.10 aryl or C.sub.6 to C.sub.10 arylene, and R.sub.2 and R.sub.3, which may be the same or different, represent C.sub.1 to C.sub.10 alkyl in the presence of water and/or blowing agent. The present invention also relates to dialkoxy-phosphonyl-N-formic acid amides.

Dependencies are inferred from the claim text.