US4522797A
Expired / Lapsed
US
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Halophosphazene polymers
Assignee: Ethyl Corp
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Filing: 1983-09-08
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Granted: 1985-06-11
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Expires: 2003-09-08
Abstract
Abstract One or a mixture of compounds of the formula: X--(PX.sub.2 ═N).sub.n --POX.sub.2 wherein X is a halogen atom and n is an integer, usually below about 15 is heated with a suitable phosphorus reactant such as PX 5 ; PX 3 +X 2 ; P+X 2 ; or oligomer of the formula [X--(PX.sub.2 ═N).sub.n --PX.sub.3 ].sup.+ [R].sup.- wherein X is a halogen atom, R is PX 6 or X, and n is an integer usually below about 15; or a mixture of two or more such phosphorus reactants so that a halophosphazene having a --PX 3 + end group is formed as one of the co-products of the reaction. This co-product is a substance having the general formula [X--(PX.sub.2 ═N).sub.n --PX.sub.3 ].sup.+ [R].sup.- wherein X, R and n are as defined above. The other co-product is phosphoryl trihalide, POX 3 . In a second stage the resultant reaction product is heated with at least a stoichiometric amount (preferably, an excess) of a nitrogen source (e.g., NH 3 ; NH 4 Cl; etc.) so that hydrogen halide is evolved and halophosphazene polymer of a suitably high molecular weight is formed.
Inventors
- 👤 F. Alexander Pettigrew
- 👤 Hsueh M. Li
- 👤 Genevieve S. Lum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:36
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/097; C01B21/098; C01B21/0986
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
86 words
A process for the preparation of halophosphazene polymer which comprises heating a substance of the formula X--(PX.sub.2 ═N).sub.n --POX.sub.2 wherein X is a halogen atom and n is an integer below about 15, with a phosphorus pentahalide so that halophosphazene having a --PX 3 + end group is formed, and then heating at least a portion of the resultant reaction product with at least a stoichiometric amount of a nitrogen source so that hydrogen halide is evolved and halophosphazene polymer of higher molecular weight is formed.
Claim 2
Dependent Claim
86 words
A process for the preparation of halophosphazene polymer which comprises heating a substance of the formula X--(PX.sub.2 ═N).sub.n --POX.sub.2 wherein X is a halogen atom and n is an integer below about 15, with a phosphorus pentahalide so that halophosphazene having a --PX 3 + end group is formed, and then heating at least a portion of the resultant reaction product with at least a stoichiometric amount of a nitrogen source so that hydrogen halide is evolved and halophosphazene polymer of higher molecular weight is formed.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein X is chlorine and the phosphorus pentahalide is phosphorus pentachloride.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein said resultant reaction product is heated with an excess of the nitrogen source.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the nitrogen source is ammonia or ammonium chloride or both of them.
Claim 6
Dependent Claim
19 words
The process of claim 2 wherein said resultant reaction product is heated with an excess of said nitrogen source.
Claim 7
Dependent Claim
18 words
The process of claim 2 wherein the nitrogen source is ammonia or ammonium chloride or both of them.
Claim 8
Dependent Claim
33 words
The process of claim 2 wherein said resultant reaction product is heated with an excess of said nitrogen source and wherein the nitrogen source is ammonia or ammonium chloride or both of them.
Claim 9
Dependent Claim
117 words
A process for the preparation of halophosphazene polymer which comprises heating a substance of the formula X--(PX.sub.2 ═N).sub.n --POX.sub.2 wherein X is a halogen atom and n is an integer below about 15, with a substance of the formula [X--(PX.sub.2 ═N).sub.n --PX.sub.3 ].sup.+ [R].sup.- wherein X is a halogen atom, R is PX 6 or X or both of them, and n is an integer below about 15, so that halophosphazene having a --PX 3 + end group is formed, and then heating at least a portion of the resultant reaction product with at least a stoichiometric amount of a nitrogen source so that hydrogen halide is evolved and halophosphazene polymer of higher molecular weight is formed.
Claim 10
Dependent Claim
117 words
A process for the preparation of halophosphazene polymer which comprises heating a substance of the formula X--(PX.sub.2 ═N).sub.n --POX.sub.2 wherein X is a halogen atom and n is an integer below about 15, with a substance of the formula [X--(PX.sub.2 ═N).sub.n --PX.sub.3 ].sup.+ [R].sup.- wherein X is a halogen atom, R is PX 6 or X or both of them, and n is an integer below about 15, so that halophosphazene having a --PX 3 + end group is formed, and then heating at least a portion of the resultant reaction product with at least a stoichiometric amount of a nitrogen source so that hydrogen halide is evolved and halophosphazene polymer of higher molecular weight is formed.
Claim 11
Dependent Claim
9 words
The process of claim 8 wherein X is chlorine.
Claim 12
Dependent Claim
19 words
The process of claim 8 wherein said resultant reaction product is heated with an excess of the nitrogen source.
Claim 13
Dependent Claim
18 words
The process of claim 8 wherein the nitrogen source is ammonia or ammonium chloride or both of them.
Claim 14
Dependent Claim
19 words
The process of claim 9 wherein said resultant reaction product is heated with an excess of said nitrogen source.
Claim 15
Dependent Claim
18 words
The process of claim 9 wherein the nitrogen source is ammonia or ammonium chloride or both of them.
Claim 16
Dependent Claim
33 words
The process of claim 9 wherein said resultant reaction product is heated with an excess of said nitrogen source and wherein the nitrogen source is ammonia or ammonium chloride or both of them.
Claim 17
Dependent Claim
114 words
A process for the preparation of halophosphazene polymer which comprises (i) chemically converting a substance of the formula X--(PX.sub.2 ═N).sub.n --POX.sub.2 wherein X is a halogen atom and n is an integer below about 15, to a halophosphazene reaction product composed at least predominantly of one or more substances of the formula [X--(PX.sub.2 ═N).sub.n --PX.sub.3 ].sup.+ [R].sup.- wherein X is a halogen atom, R is X or PX 6 and n is an integer below about 15, and then (ii) heating at least a portion of such reaction product with at least a stoichiometric amount of a nitrogen source so that hydrogen halide is evolved and halophosphazene polymer of higher molecular weight is formed.
Claim 18
Dependent Claim
114 words
A process for the preparation of halophosphazene polymer which comprises (i) chemically converting a substance of the formula X--(PX.sub.2 ═N).sub.n --POX.sub.2 wherein X is a halogen atom and n is an integer below about 15, to a halophosphazene reaction product composed at least predominantly of one or more substances of the formula [X--(PX.sub.2 ═N).sub.n --PX.sub.3 ].sup.+ [R].sup.- wherein X is a halogen atom, R is X or PX 6 and n is an integer below about 15, and then (ii) heating at least a portion of such reaction product with at least a stoichiometric amount of a nitrogen source so that hydrogen halide is evolved and halophosphazene polymer of higher molecular weight is formed.
Claim 19
Dependent Claim
9 words
The process of claim 15 wherein X is chlorine.
Claim 20
Dependent Claim
18 words
The process of claim 15 wherein the nitrogen source is ammonia or ammonium chloride or both of them.
Claim 21
Dependent Claim
17 words
The process of claim 15 wherein the nitrogen source is employed in excess over the stoichiometric amount.
Claim 22
Dependent Claim
18 words
The process of claim 16 wherein the nitrogen source is ammonia or ammonium chloride or both of them.
Claim 23
Dependent Claim
17 words
The process of claim 16 wherein the nitrogen source is employed in excess over the stoichiometric amount.
Claim 24
Dependent Claim
27 words
The process of claim 16 wherein the nitrogen source is ammonia or ammonium chloride or both of them and is employed in excess over the stoichiometric amount.
References Cited (Backward Citations)
CA572951A
Cited
US4374815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |