Claims
- 1. A process for the improvement of the flame retardant properties of a polyurethane polymer composition which comprises incorporating therein an effective flame retardant amount ranging from greater than 5% up to about 50% by weight, based on the weight of the final modified polymer, of a compound of the formula ##STR2## where X is chlorine or bromine;
- m is a number from 2 to 4;
- Y is oxygen or sulfur; and
- R is an alkyl, aryl, alkoxy or aryloxy group of 1 to 10 carbon atoms.
- 2. The process of claim 1 wherein said compound is 1-phenyl-3,4-dibromo phospholane-1-oxide.
- 3. The process of claim 1 wherein said compound is 1-phenyl-2,3-dibromo phospholane-1-oxide.
- 4. The process of claim 1 wherein said compound is 1-methyl-3,4-dibromo phospholane-1-oxide.
- 5. The process of claim 1 wherein said compound is 1-methyl-2,3-dibromo phospholane-1-oxide.
- 6. The process of claim 1 wherein said compound is 1-phenyl-2,3-dichloro phospholane-1-oxide.
- 7. The process of claim 1 wherein said compound is 1-methyl-3,4-dibromo phospholane-1-oxide and in which said compound is incorporated at a level of about 6% by weight in a polyurethane foam.
- 8. The process of claim 1 wherein said compound is 1-phenoxy-2,3-dibromo phospholane-1-oxide and in which said compound is incorporated at a level of about 6% by weight in a polyurethane foam.
- 9. The process of claim 1 wherein said compound is 1-phenyl-2,3-dichloro phospholane-1-oxide and in which said compound is incorporated at a level of about 7% by weight in a polyurethane foam.
- 10. The process of claim 1 in which the compound is selected from the group consisting of 1-alkyl-dihalo-phospholane-1-oxides and 1-aryl-dihalo-phospholane-1-oxides.
RELATED APPLICATION
This is a continuation-in-part of copending application Ser. No. 752,041, filed Dec. 20, 1976 now abandoned.
US Referenced Citations (15)
Non-Patent Literature Citations (1)
Entry |
Hilado, "Flammability Handbook for Plastics, " 1969, pp. 82-86. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
752041 |
Dec 1976 |
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