Patent US4250294A successfully refreshed from Google Patents.
US4250294A
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Polymers obtained from polynitroaromatic compounds
Assignee: Dynamit Nobel AG
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Filing: 1978-11-22
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Granted: 1981-02-10
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Expires: 1998-11-22
Abstract
Abstract A polymer having aromatic or heterocyclic rings as the only structural elements said aromatic or heterocyclic rings containing at least two nitro groups is disclosed as well as a method of preparing the same. The polymers are useful as binding agents for thermo stable propellants and can be easily formed into films. They remain thermally stable up to temperatures of at least 200° C.
Inventors
- 👤 Rainer Hagel
- 👤 Klaus Redecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:01
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/12; C08G61/121; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105; C07; C07C; C07C205/00; C07C205/06; C07C205/07; C07C205/11; C07C205/12; C07C205/13; C07C205/20; C07C205/21; C07C205/24; C07C205/27; C07C205/35; C07C205/36; C07C205/38; C08G61/02; C08G61/10
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
72 words
A polymer having an aromatic or heterocyclic ring as the only structural element, said polymer containing at least 2 nitro groups on said aromatic or heterocyclic ring, the hetero atom of said hetercyclic ring being oxygen, nitrogen, or sulfur, the polymer having at least four recurring units and up to 20 recurring units said aromatic or heterocyclic ring optionally containing, in addition to said nitro groups, a hydroxy, methyl or methoxy group.
Claim 2
Dependent Claim
72 words
A polymer having an aromatic or heterocyclic ring as the only structural element, said polymer containing at least 2 nitro groups on said aromatic or heterocyclic ring, the hetero atom of said hetercyclic ring being oxygen, nitrogen, or sulfur, the polymer having at least four recurring units and up to 20 recurring units said aromatic or heterocyclic ring optionally containing, in addition to said nitro groups, a hydroxy, methyl or methoxy group.
Claim 3
Dependent Claim
23 words
A polymer according to claim 1 wherein the recurring unit of the polymer has the formula ##STR7## wherein R is hydrogen or methyl.
Claim 4
Dependent Claim
54 words
A polymer having the recurring unit which is the divalent radical of a compound of the formula ##STR8## wherein A represents oxygen or a moiety of the group ##STR9## y=0 or 1, said divalent radical being formed by removal of 2 hydrogen atoms bonded to carbocyclic carbon atoms, having at least four recurring units.
Claim 5
Dependent Claim
54 words
A polymer having the recurring unit which is the divalent radical of a compound of the formula ##STR8## wherein A represents oxygen or a moiety of the group ##STR9## y=0 or 1, said divalent radical being formed by removal of 2 hydrogen atoms bonded to carbocyclic carbon atoms, having at least four recurring units.
Claim 6
Dependent Claim
28 words
A polymer according to claim 1 wherein the recurring unit consists of a dinuclear or polynuclear nitrated ring, one of the rings containing one or more hetero atoms.
Claim 7
Dependent Claim
13 words
A polymer according to claim 1 having between 4 and 12 recurring units.
Claim 8
Dependent Claim
51 words
A homopolymer having a recurring unit of the formula ##STR10## wherein x is 2 to 3, n is 4 to 20 and Ar is a methyl, methoxy, or hydroxy substituted or unsubstituted arylene radical, fused arylene-heterocyclic radical or a divalent heterocyclic radical where the hetero atom is oxygen, nitrogen, or sulfur.
Claim 9
Dependent Claim
51 words
A homopolymer having a recurring unit of the formula ##STR10## wherein x is 2 to 3, n is 4 to 20 and Ar is a methyl, methoxy, or hydroxy substituted or unsubstituted arylene radical, fused arylene-heterocyclic radical or a divalent heterocyclic radical where the hetero atom is oxygen, nitrogen, or sulfur.
Claim 10
Dependent Claim
22 words
A homopolymer according to claim 6 having a molecular weight of between 800 and 4500 said molecular weight determined by gel chromatography.
Claim 11
Dependent Claim
21 words
A homopolymer according to claim 6 wherein Ar is a divalent arylene radical having between 6 and 4 carbocyclic carbon atoms.
Claim 12
Dependent Claim
16 words
A homopolymer according to claim 8 wherein Ar is a single ring or fused diaryl radical.
Claim 13
Dependent Claim
29 words
A homopolymer according to claim 8 wherein Ar is a heterocyclic radical having 3 to 13 carbocyclic carbon atoms and having as the hetero atom oxygen, nitrogen or sulphur.
Claim 14
Dependent Claim
13 words
A homopolymer according to claim 10 wherein Ar is a fused heterocyclic radical.
Claim 15
Dependent Claim
42 words
A process for preparing a polymer of claim 1 which comprises contacting a mononuclear, dinuclear or polynuclear aromatic or heterocyclic compound containing at least 2 nitro groups and at least 2 halogen atoms on the ring at an elevated temperature with copper.
Claim 16
Dependent Claim
24 words
A process according to claim 12 wherein said aromatic or heterocyclic compound is contacted with a said copper in the presence of a solvent.
Claim 17
Dependent Claim
25 words
A process according to claim 12 wherein the aromatic or heterocyclic compound is contacted with the copper at a temperature between 150° and 250° C.
Claim 18
Dependent Claim
42 words
A process according to claim 12 wherein the reaction is performed employing a compound of the formula ##STR11## in which R represents hydrogen or methyl and W represents a halogen, and p and q can individually be equal to 2 or 3.
Claim 19
Dependent Claim
47 words
A process for preparing a polymer which comprises contacting a compound of the formula ##STR12## in which A is --O--, --CH═CH--, --NH--, or ##STR13## W represents a halogen, p, q, x, and z each individually represent values of 2 or 3 with copper at an elevated temperature.
Claim 20
Dependent Claim
47 words
A process for preparing a polymer which comprises contacting a compound of the formula ##STR12## in which A is --O--, --CH═CH--, --NH--, or ##STR13## W represents a halogen, p, q, x, and z each individually represent values of 2 or 3 with copper at an elevated temperature.
Claim 21
Dependent Claim
10 words
A polymer according to claim 3 wherein A represents --CH═CH--.
Claim 22
Dependent Claim
10 words
A polymer according to claim 3 wherein A represents --NH--.
Claim 23
Dependent Claim
10 words
A polymer according to claim 3 wherein A represents ##STR14##
Claim 24
Dependent Claim
10 words
A polymer according to claim 3 wherein A is --O--.
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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |