Reactive flame retardants for flexible polyurethane foams
AssigneeICL-IP America Inc.
InventorsJeffrey Stowell, Zhihao Chen, Gerardo Francisco
Life of this patent
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Abstract
The present invention provides reactive multi-functional dialkyl phosphinate compound(s), serving as highly efficient reactive flame retardants in flexible polyurethane foams. The invention further provides fire-retarded polyurethane compositions comprising said multi-functional dialkyl phosphinate compound and applications containing the same.
Claims23
A multi-functional dialkyl phosphinate compound of the general formula (I):
- wherein each R1 and R2 are individually selected from an alkyl group containing from 1 to 4 carbon atoms,
- R is a divalent linear or branched alkyl containing up to about 4 carbon atoms, a divalent aralkyl group of from 7 to 13 carbon atoms, or a bond,
- X and Y are each independently a divalent aryl group containing from 6 to 12 carbon atoms,
- the subscripts a and b are each 0 or 1,
- the subscript c is an integer of from 1 to 5, and
- the subscript d is an integer from 1 to 26,
- with the provisos that:
- a+b=1,
- when a=1, then b is 0, X is an aryl group as defined except that a hydrogen atom bonded to the aryl group is not part of the bracketed group of subscript c, and subscript c is an integer from 1 to 5 and subscript d is 1, and,
- when b=1, then a is 0, c is 1, and d is an integer of from 1 to 26.
A process of making a multifunctional dialkyl phosphinate compound comprising reacting a dialkyl phosphinic acid with an aromatic epoxide.
A flame-retarded polyurethane foam comprising the reaction product of a polyol, an isocyanate and a flame retardant-effective amount of multi-functional dialkyl phosphinate compound of the general formula (I):
- wherein each R1 and R2 are individually selected from an alkyl group containing from 1 to 4 carbon atoms,
- R is a divalent linear or branched alkyl containing up to about 4 carbon atoms, a divalent aralkyl group of from 7 to 13 carbon atoms, or a bond,
- X and Y are each independently a divalent aryl group containing from 6 to 12 carbon atoms,
- the subscripts a and b are each 0 or 1,
- the subscript c is an integer of from 1 to 5, and
- the subscript d is an integer from 1 to 26,
- with the provisos that:
- a+b=1,
- when a=1, then b is 0, X is an aryl group as defined except that a hydrogen atom bonded to the aryl group is not part of the bracketed group of subscript c, and subscript c is an integer from 1 to 5 and subscript d is 1, and,
- when b=1, then a is 0, c is 1, and d is an integer of from 1 to 26.
A composition comprising:
- (a) a multi-functional dialkyl phosphinate compound of the general formula (I):
- wherein each R1 and R2 are individually selected from an alkyl group containing from 1 to 4 carbon atoms,
- R is a divalent linear or branched alkyl containing up to about 4 carbon atoms, a divalent aralkyl group of from 7 to 13 carbon atoms, or a bond,
- X and Y are each independently a divalent aryl group containing from 6 to 12 carbon atoms,
- the subscripts a and b are each 0 or 1,
- the subscript c is an integer of from 1 to 5, and
- the subscript d is an integer from 1 to 26,
- with the provisos that:
- a+b=1,
- when a=1, then b is 0, X is an aryl group as defined except that a hydrogen atom bonded to the aryl group is not part of the bracketed group of subscript c, and subscript c is an integer from 1 to 5 and subscript d is 1, and, when b=1, then a is 0, c is 1, and d is an integer of from 1 to 26;
- and,
- (b) a monohydroxyl dialkyl phosphinate compound.
Dependencies are inferred from the claim text.