Claims
- 1. A process for forming a phosphazene polymer which is substantially free of halogen which process comprises:
- (a) thermally polymerizing a cyclic compound of the formula (NPCl.sub.2).sub.y wherein y is 3, 4, or mixtures thereof with a catalytically sufficient amount of a compound having the formula M(OR').sub.x, wherein M is an alkali metal or an alkaline earth metal, x is equal to the valence of the metal M, and R' is C.sub.1 to C.sub.10 linear or branched alkyl, C.sub.1 to C.sub.10 substituted linear or branched alkyl, the substituent selected from the group consisting of nitro, C.sub.1 to C.sub.10 alkyl, C.sub.1 to C.sub.10 alkoxy, C.sub.6 to C.sub.10 aryl and C.sub.6 to C.sub.10 aryloxy radicals; and
- (b) contacting the resulting phosphazene polymer with a metal compound having the formula
- M(OC.sub.6 H.sub.4 R.sub.1).sub.x,
- M(OC.sub.6 H.sub.4 R.sub.2).sub.x, or mixtures thereof
- wherein M is an alkali metal or alkaline earth metal, x is equal to the valence of said metal M, and R.sub.1 and R.sub.2 are the same or different and are selected from the group consisting of C.sub.1 to C.sub.10 alkyl radical, C.sub.6 to C.sub.10 aryl radical, C.sub.1 to C.sub.10 substituted C.sub.1 to C.sub.10 alkyl radical and substituted C.sub.6 to C.sub.10 aryl radical, the substituent selected from the group consisting of halogen, nitro, cyano, C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.4 alkoxy, C.sub.6 to C.sub.10 aryl and C.sub.6 to C.sub.10 aryloxy radicals.
- 2. The process in accordance with claim 1 wherein the catalytically formed phosphazene polymer is additionally contacted with a metal compound having the formula M(W).sub.x, wherein W represents a monovalent radical containing a group capable of a crosslinking chemical reaction at moderate temperatures, said group being attached to the phosphorous atom of the phosphazene polymer by an --O-- linkage.
- 3. The process in accordance with claim 2 wherein R.sub.1 and R.sub.2 are the same or different and are selected from the group consisting of C.sub.1 to C.sub.10 alkyl, and C.sub.1 to C.sub.4 alkoxy and W is selected from the group consisting of --OCH = CH.sub.2, --OR.sub.3 CH = CH.sub.2, --OC(R.sub.3) = CH.sub.2 and --OR.sub.3 CF = CF.sub.2 wherein R.sub.3 is C.sub.2 to C.sub.10 alkylene.
- 4. The process in accordance with claim 2 wherein said phosphazene polymer, substantially free of halogen, is a homopolymer of the formula --NP(OC.sub.6 H.sub.4 R.sub.1 --.sub.n or a copolymer of the formula --NP(OC.sub.6 H.sub.4 R.sub.1).sub.a (OC.sub.6 H.sub.4 R.sub.2).sub.b (W).sub.c --.sub.n wherein (OC.sub.6 H.sub.4 R.sub.1):(OC.sub.6 H.sub.4 R.sub.2) is from 1:6 to 6:1 and W:[(OC.sub.6 H.sub.4 R.sub.1)+(OC.sub.6 H.sub.4 R.sub.2)] is less than 1:5 and R.sub.1 and R.sub.2 are different, n is from 6 to 11000, C>O and a+b+c = 2.
- 5. The process in accordance with claim 4 wherein said phosphazene polymer, substantially free of halogen having W present, is cured by heating at a temperature of from 200.degree.-350.degree. F. with sulfur-type curing agents.
- 6. The process in accordance with claim 4 wherein said phosphazene polymer, substantially free of halogen, is cured by heating at a temperature of from 200.degree.-350.degree. F. with peroxide-type curing agents.
- 7. A process for forming a phosphazene polymer which is substantially free of halogen which process comprises:
- (a) thermally polymerizing a cyclic compound of the formula (NPCl.sub.2).sub.y where y is 3, 4, or mixtures thereof with a catalytically sufficient amount of a compound having the formula N.sub.3 P.sub.3 Cl.sub.z (OR').sub.6-z wherein R' is C.sub.1 to C.sub.10 linear or branched alkyl, C.sub.1 to C.sub.10 substituted linear or branched alkyl, the substituent selected from the group consisting of halogen, nitro, C.sub.1 to C.sub.10 alkyl, C.sub.1 to C.sub.10 alkoxy, C.sub.6 to C.sub.10 aryl and C.sub.6 to C.sub.10 aryloxy radicals and z equals 0 to 5; and
- (b) contacting the resulting phosphazene polymer with a metal compound having the formula
- M(OC.sub.6 H.sub.4 R.sub.1).sub.x,
- M(OC.sub.6 H.sub.4 R.sub.2).sub.x, or mixtures thereof
- wherein M is an alkali metal or an alkaline earth metal, x is equal to the valence of said metal M, and R.sub.1 and R.sub.2 are the same or different and are selected from the group consisting of C.sub.1 to C.sub.10 alkyl radical, C.sub.6 to C.sub.10 aryl radical, substituted C.sub.1 to C.sub.10 alkyl radical and substituted C.sub.6 to C.sub.10 aryl radical, the substituent selected from the group consisting of halogen, nitro, cyano, C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.4 alkoxy, C.sub.6 to C.sub.10 aryl and C.sub.6 to C.sub.10 aryloxy radicals.
- 8. The process in accordance with claim 7 wherein the catalytically formed phosphazene polymer is additionally contacted with a metal compound having the formula M(W).sub.x, wherein W represents a monovalent radical containing a group capable of a crosslinking chemical reaction at moderate temperatures, said group being attached to the phosphorous atom of the phosphazene polymer by an --O-- linkage.
- 9. The process in accordance with claim 8 wherein R.sub.1 and R.sub.2 are the same or different and are selected from the group consisting of C.sub.1 to C.sub.10 alkyl, and C.sub.1 to C.sub.4 alkoxy and W is selected from the group consisting of --OCH = CH.sub.2, --OR.sub.3 CH = CH.sub.2, --OC(R.sub.3) = CH.sub.2 and --OR.sub.3 CF = CF.sub.2 wherein R.sub.3 is C.sub.2 to C.sub.10 alkylene.
- 10. The process in accordance with claim 8 wherein said phosphazene polymer, substantially free of halogen, is a homopolymer of the formula --NP(OC.sub.6 H.sub.4 R.sub.1 --.sub.n or a copolymer of the formula --NP(OC.sub.6 H.sub.4 R.sub.1).sub.a (OC.sub.6 H.sub.4 R.sub.2).sub.b (W).sub.c --.sub.n wherein (OC.sub.6 H.sub.4 R.sub.1):(OC.sub.6 H.sub.4 R.sub.2) is from 1:6 to 6:1 and W:[(OC.sub.6 H.sub.4 R.sub.1)+(OC.sub.6 H.sub.4 R.sub.2)] is less than 1:5 and R.sub.1 and R.sub.2 are different, n is from 6 to 11000, C>O and a+b+c = 2.
- 11. The process in accordance with claim 10 wherein said phosphazene polymer, substantially free of halogen having W present, is cured by heating at a temperature of from 200.degree.-350.degree. F. with sulfur-type curing agents.
- 12. The process in accordance with claim 10 wherein said phosphazene polymer, substantially free of halogen, is cured by heating at a temperature of from 200.degree.-350.degree. F. with peroxide-type curing agents.
CROSS-REFERENCE TO RELATED APPLICATION
This is a division of application Ser. No. 731,745, filed Oct. 12, 1976.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3370020 |
Allcock et al. |
Feb 1968 |
|
3917802 |
Allcock et al. |
Nov 1975 |
|
4076658 |
Dieck et al. |
Feb 1978 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
731745 |
Oct 1976 |
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