Rigid polyurethane foam containing reactive flame retardant
AssigneeICL-IP America Inc.
InventorsAndrew Piotrowski, Joseph Zilberman, Jeffrey Stowell, Mark Gelmont, Mayank Singh, Zhihao Chen, Eran Gluz
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Abstract
The present invention provides fire-retarded rigid polyurethane foam comprising the reaction product of polyol and isocyanate foam forming components and a dialkyl phosphorus-containing compound, namely a reactive mono-hydroxyl-functional dialkyl phosphinates, as flame retardant, serving as highly efficient reactive flame retardant in said rigid polyurethane foam.
Claims13
A flame-retarded rigid polyurethane foam comprising the reaction product of a polyol, an isocyanate having an isocyanate index range of from about 400 to about 150 and a flame-retardant-effective amount of a mono-hydroxyl-functional dialkyl phosphinate compound of the formula (I-A):
- wherein:
- R1 and R2 are selected from a linear or branched alkyl group containing from 1 to 4 carbon atoms;
- and,
- X is either
- and when X is
- Z is —(Y—O)n—, wherein Y is a linear or branched alkylene group containing from 2 to 8 carbon atoms and n represents an integer from 1 to 20;
- k may be 0 or 1;
- R3 is selected from hydrogen, a mono-hydroxy-terminated linear or branched alkylene group containing from 2 to about 8 carbon atoms;
- and,
- provided that when k is zero, R3 is the mono-hydroxy-terminated linear or branched alkylene group and when k is 1, R3 is hydrogen, and
- when X is
- R4 and R5 are each independently selected from H, a linear or branched alkyl group containing from 1 to 8 carbon atoms, a linear or branched alkenyl group containing from 2 to 8 carbon atoms, a halo-substituted alkyl group containing from 1 to 8 carbon atoms, an alkoxy group containing from 1 to 8 carbon atoms, an aryl group containing from 6 to 12 carbon atoms and an alkylaryl group containing from 7 to 16 carbon atoms, or R4 and R5 are bonded to each other to form a cycloalkyl group containing from 5 to about 8 carbon atoms.
A pressurized one-component foam container comprising a polyol, an isocyanate, and a flame-retardant-effective amount of a flame retardant comprising mono-hydroxyl-functional dialkyl phosphinate compound of the formula (I-A):
- wherein:
- R1 and R2 are selected from a linear or branched alkyl group containing from 1 to 4 carbon atoms;
- and,
- X is either
- and when X is
- Z is —(Y—O)n—, wherein Y is a linear or branched alkylene group containing from 2 to 8 carbon atoms and n represents an integer from 1 to 20;
- k may be 0 or 1;
- R3 is selected from hydrogen, a mono-hydroxy-terminated linear or branched alkylene group containing from 2 to about 8 carbon atoms;
- and,
- provided that when k is zero, R3 is the mono-hydroxy-terminated linear or branched alkylene group and when k is 1, R3 is hydrogen, and
- when X is
- R4 and R5 are each independently selected from H, a linear or branched alkyl group containing from 1 to 8 carbon atoms, a linear or branched alkenyl group containing from 2 to 8 carbon atoms, a halo-substituted alkyl group containing from 1 to 8 carbon atoms, an alkoxy group containing from 1 to 8 carbon atoms, an aryl group containing from 6 to 12 carbon atoms and an alkylaryl group containing from 7 to 16 carbon atoms, or R4 and R5 are bonded to each other to form a cycloalkyl group containing from 5 to about 8 carbon atoms.
Dependencies are inferred from the claim text.