Claims
- 1. A flame retardant polymer comprising units of the formula ##STR6## in which R.sup.1 and R.sup.2 are independently selected from the group consisting of alkyl having from 1 to 6 carbon atoms, alkenyl having from 1 to 6 carbon atoms, and hydrogen; R.sup.3 is selected from the group consisting of alkyl having from 1 to 6 carbon atoms, alkenyl having from 1 to 6 carbon atoms, halogen and hydrogen; Ar is selected from the group consisting of monocarbocylic and dicarbocyclic aromatic radicals unsubstituted and substituted with up to 5 substituents selected from among halogen and alkyl having from 1 to 3 carbon atoms; m is zero or a whole number from 1 to 3; and n is a whole number from 1 to 3.
- 2. A polymer according to claim 1, which comprises units of the formula recited with units of a nonphosphorous containing alkenyl aromatic compound.
- 3. A polymer according to claim 2, in which the non-phosphorous containing alkenyl aromatic compound is styrene.
- 4. A polymer according to claim 2, which is a copolymer of styrene and 4-vinylbenzene diphenyl phosphine oxide.
- 5. A polymer according to claim 1, having a phosphorouss content of from about 0.4 to about 1.0 weight percent.
- 6. A flame retardant thermoplastic composition, comprising an admixture of a polymer according to claim 1 with a polyphenylene ether resin.
- 7. A composition according to claim 6, in which the polyphenylene ether resin is a homopolymer or copolymer having units of the formula ##STR7## in which Q, Q', Q" and Q"' are, independently, selected from the group consisting of hydrogen, halogen, hydrocarbon radicals, halohydrocarbon radicals, hydrocarbonoxy radicals, and halohydrocarbonoxy radicals; and n represents the total number of monomer units and is an integer of at least about 20.
- 8. A composition according to claim 6, in which the polyphenylene ether resin is poly(2,6-dimethyl-1,4-phenylene ether)resin.
- 9. A composition according to claim 6, which comprises an admixture of 4-vinylbenzyl diphenyl phosphine oxide and poly(2,6-dimethyl-1,4-phenylene ether)resin.
Parent Case Info
This is a division of application Ser. No. 566,341 filed Dec. 28, 1984, now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3051740 |
Abromo et al. |
Aug 1962 |
|
3725365 |
McKinley et al. |
Apr 1973 |
|
3991134 |
Kraft et al. |
Nov 1976 |
|
4433088 |
Haaf et al. |
Feb 1984 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
566341 |
Dec 1984 |
|