Oligomeric phosphoric acid esters which carry hydroxyalkoxy groups, their preparation and their use
AssigneeHoechst Aktiengesellschaft
InventorMartin Sicken
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Abstract
The invention relates to mixtures of oligomeric phosphoric acid esters which carry hydroxyalkoxy groups, of the formula I ##STR1## in which R.sub.1 is a hydroxyl-containing radical of the formula IIa, R.sub.2 is a radical of the formula III ##STR2## R.sub.3 is a radical of the formula IIb, R.sub.4 is R.sub.1 or R.sub.3 ; R.sub.5, R.sub.6 and R.sub.7 are an H atom or an alkyl radical having 1 to 6 carbon atoms, m is 0 to 4, n is 1 to 4 q is 0 to 20 and q (the mean) is 0.5 to 10. The invention also relates to a process for the preparation of the mixtures and to their use as reactive flameproofing agents in polyurethane foams.
Claims5
A mixture of oligomeric phosphoric acid esters which carry hydroxyalkoxy groups of the formula I ##STR15## in which R.sub.1 is a hydroxyl-containing radical of the formula IIa, R.sub.2 is a radical of the formula III ##STR16## R.sub.3 is a radical of the formula IIb, R.sub.4 is R.sub.1 or R.sub.3;
- R.sub.5, R.sub.6 and R.sub.7 are an H atom or an alkyl radical having 1 to 6 carbon atoms, m is to 4, n is 1 to 4 and q is 0 to 20 and q (the mean) is 0.5 to 10.
Dependencies are inferred from the claim text.