Reducing flammability of polyurethane foams with phosphorus compounds
AssigneeHoechst Aktiengesellschaft
InventorsHartfrid Vollmer, Franz-Josef Dany, Joachim Wortmann
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Abstract
Production of agents reducing the flammability of polyurethane moulding compositions. The agents are more particularly comprised of compounds of the following general formula (I) ##STR1## IN WHICH R stands for an alkylene radical having from 2 to 6 carbon atoms, which may be halogen-substituted, if desired, a --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CH.sub.2 -- radical, a phenylene radical or an alkyl- or halogenoalkyl-substituted diphenylene methane radical, R.sub.1 and R.sub.2, respectively, stand for a hydrogen atom, an alkyl radical or a halogen-substituted alkyl radical having from 1 to 4 carbon atoms, x + y stand for a number between 0.1 and 3, and n stands for 1 or 2.
Claims4
A process for making polyurethane moulding compositions of reduced flammability by subjecting an organic polyol and a flameproofing agent containing alcoholic OH-groups to condensation with equivalent quantities of an organic isocyanate compound, in the presence of activators, expanding agents and cell regulators, which comprises using as the flameproofing agent a compound of general formula (I) ##STR20## in which R represents phenylene, or alkyl- or halogen-alkyl-substituted diphenylene methane, R.sub.1 and R.sub.2, respectively, stand for a hydrogen atom, an alkyl radical or a halogen-substituted alkyl radical having from 1 to 4 carbon atoms, x + y stand for a number between 0.1 and 3, and n stands for 1 or 2.
Dependencies are inferred from the claim text.