Phosphorus-containing polyols as flame retardant agents for polyurethanes
AssigneeUniroyal, Inc.
InventorWadim Batorewicz
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Abstract
Phosphate esters having the formula Ro[-(A)M(B)NH] wherein A has the structural formula ##STR1## and B has the structural formula ##STR2## wherein the R groups are alkyl radicals, m and n are each integers from 0 to 4 and the sum of m + n is from 1 to about 4, are useful as flame retardants, especially for rigid polyurethane foams.
Claims6
A flame retardant composition comprising a polyurethane polymer and a flame retarding effective amount of a phosphate ester of the formula RO[(A).sub.m (B).sub.n ]H integrally part of the polymer wherein A has the structure ##STR8## and B has the structure ##STR9## wherein R, R.sup.1 and R.sup.2 are the same or different and are linear or branched primary radicals selected from alkyl having 1 to 6 carbon atoms, and chloroalkyl, bromoalkyl and hydroxy alkyl having 2 to 6 carbon atoms;
- m and n are integers from 1 to about 3 and the sum of m plus n is from 2 to about 4.
Dependencies are inferred from the claim text.