Phosphorus containing flame retarding agents which are reactive with isocyanates

Abstract

This invention relates to novel flame retarding agents and processes in which they are used in the production of polyurethanes. These compounds are represented by the general formula: ##STR1## wherein: A and B, which are identical or different, represent optionally branched C.sub.1 -C.sub.17 -alkyl groups or --OR groups wherein R represents an optionally branched C.sub.1 -C.sub.8 -alkyl group, and X represents hydrogen, halogen, an optionally branched C.sub.1 -C.sub.8 alkyl group, a C.sub.6 -C.sub.12 aryl or aralkyl group, NH.sub.2, CF.sub.3, CN, COOR', SO.sub.3 R', ##STR2## wherein: R' represents hydrogen or an optionally branched alkyl or cycloalkyl group having 1-10 C atoms and R" represents an optionally branched alkyl or cycloalkyl group having 1-10 C atoms.

Dependencies are inferred from the claim text.