Claims
- 1. A flame retardant blend comprising: (a) a monomeric halogenated organic flame retardant that is adapted for use in a polyurethane foam formulation; and (b) an oligomeric organophosphate flame retardant having a phosphorus content of no less than about 10%, by weight, and at least three phosphate ester units therein, and being of the formula
- 2. A blend as claimed in claim 1 wherein flame retardant (a) is a halogenated phosphate ester.
- 3. A blend as claimed in claim 1 wherein flame retardant (a) comprises a polybrominated diphenyl oxide.
- 4. A blend as claimed in claim 1 wherein flame retardant (a) is a halogenated phosphate ester and is present at from about 50% to about 95%, by weight of the blend.
- 5. A blend as claimed in claim 1 wherein flame retardant (a) is a polybrominated diphenyl oxide and is present at from about 50% to about 95%, by weight of the blend.
- 6. A blend as claimed in any of claims 1-5 wherein R and R′ are ethyl and ethylene, respectively.
Parent Case Info
[0001] This is a continuation of U.S. Ser. No. 09/707,505, filed Nov. 7, 2000, which is a divisional of U.S. Ser. No. 09/291,153, filed Apr. 12, 1999, now U.S. Pat. No. 6,262,135.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09291153 |
Apr 1999 |
US |
Child |
09707505 |
Nov 2000 |
US |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09707505 |
Nov 2000 |
US |
Child |
10628982 |
Jul 2003 |
US |