Patent US4810480A successfully refreshed from Google Patents.
US4810480A
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Preparation of polychlorophosphazene
Assignee: Arkema France SA
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Filing: 1988-03-10
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Granted: 1989-03-07
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Expires: 2008-03-10
Abstract
Abstract Polychlorophosphazene [Cl 2 (O)P[NPCl 2 ] n Cl] is more rapidly produced by polycondensing N-(dichlorophosphoryl)-trichlorophosphazene [P 2 NOCl 5 ] in the presence of a catalytically effective amount of a tertiary amine.
Inventors
- 👤 Jean-Paul Chambrette
- 👤 Roger De Jaeger
- 👤 Philippe Potin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:42
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/097; C01B21/098; C01B21/0986; C01B25/00; C01B25/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
45 words
A process for the preparation of polychlorophosphazene [Cl 2 (O)P[NPCl 2 ] n Cl], comprising polycondensing N-(dichlorophosphoryl)trichlorophosphazene [P 2 NOCl 5 ], at least a part of the polycondensation reaction being carried out in the presence of a catalytically effective amount of a tertiary amine.
Claim 2
Dependent Claim
45 words
A process for the preparation of polychlorophosphazene [Cl 2 (O)P[NPCl 2 ] n Cl], comprising polycondensing N-(dichlorophosphoryl)trichlorophosphazene [P 2 NOCl 5 ], at least a part of the polycondensation reaction being carried out in the presence of a catalytically effective amount of a tertiary amine.
Claim 3
Dependent Claim
95 words
The process as defined by claim 1, said teritary amine comprising an aliphatic amine containing at least twelve carbon atoms, a mono- or polycyclic aromatic amine, the aromatic nuclei of which being optionally substituted with halogen atoms or alkyl radicals containing up to 3 carbon atoms, heterocyclic amines containing 1 or 2 nitrogen atoms and, optionally, other heteroatoms, substituted such heterocycles bearing at least one halogen atom or alkyl radical substituent containing up to 3 carbon atoms, aralkyl or aryl groups, or forming, together with one or more aromatic ring members, a condensed polycyclic system.
Claim 4
Dependent Claim
40 words
The process as defined by claim 1, said tertiary amine comprising tributylamine; triisopentylamine; tripentylamine; trihexylamine; tris(2-methylbutyl)amine; triheptylamine; trioctylamine; tridecylamine; triphenylamine; N,N-dimethyl-α-naphthylamine; N,N-dimethyl-β-naphthylamine; 2,6-dibromopyridine; 2-phenyl, 3-phenyl and 4-phenylpyridines; 2,3,4-trimethyl, 2,3,5-trimethyl, 2,3,6-trimethyl, 2,4,5-trimethyl or 2,4,6-trimethylpyridine; 4-butylmorpholine; 4-benzylmorpholine; 4-phenylmorpholine; benzothiazole; phenanthridine; or 2,4-dichloro-5-methylpyrimidine.
Claim 5
Dependent Claim
14 words
The process as defined by claim 2, said tertiary amine comprising a substituted pyridine.
Claim 6
Dependent Claim
18 words
The process as defined by claim 1, said tertiary amine being stable at a temperature of 200° C.
Claim 7
Dependent Claim
18 words
The process as defined by claim 1, said tertiary amine being stable at a temperature of 240° C.
Claim 8
Dependent Claim
23 words
The process as defined by claim 1, carried out in the presence of from 0.2 to 1.5 mole % of the tertiary amine.
Claim 9
Dependent Claim
14 words
The process as defined by claim 1, carried out in an aromatic solvent medium.
Claim 10
Dependent Claim
13 words
The process as defined by claim 1, said tertiary amine comprising a trimethylpyridine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |