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US3634036A
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Nitro-substituted epoxy polymers and the pyrolyzed products thereof
Assignee: United States Department of the Navy
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Filing: 1969-03-10
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Granted: 1972-01-11
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Expires: 1989-03-10
Abstract
Abstract Nitrosubstituted epoxy polymers which are the reaction products of (1) a nonnitrosubstituted epoxy resin cured with a nitrosubstituted curing agent or (2) a nitrosubstituted epoxy resin cured with a conventional nonnitrosubstituted curing agent for that purpose or (3) a nitrosubstituted epoxy resin cured with a nitrosubstituted curing agent and the pyrolyzed products of these systems.
Inventors
- 👤 Gerald J Fleming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:10
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/524; C08G59/4007; C08G59/4014; C08G59/50; C08G59/5033
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
24 words
The product as defined in claim 1 wherein said glycidyl ether of a polyhydric phenol has an epoxy equivalent weight of at least 100.
Claim 2
Dependent Claim
25 words
The product as defined in claim 2 wherein the glycidyl ether of a polyhydric phenol and nitro-substituted curing agent are present in essentially stoichiometric amounts.
Claim 3
Dependent Claim
60 words
The reaction product of a nitro-substituted epoxy resin defined by the general formula: wherein R is a member selected from the group consisting of H, OH and and n has a valve of 0 to 10 inclusive and a nitro-substituted curing agent selected from the group consisting of 2-NITRORESORCINOL, 2-nitro-p-phenylene diamine, 4-nitro-o-phenylene diamine, m-nitrophenyl boric acid, 2-nitro-1,8-naphthalic anhydride and 5-nitro-benzimidazole.
Claim 4
Dependent Claim
21 words
The product of claim 4 wherein the nitro-substituted epoxy resin and the nitro-substituted curing agent are present in essentially stoichiometric amounts.
Claim 5
Dependent Claim
45 words
The hard graphitelike material obtained by the pyrolysis of the reaction product of a nonnitro-substituted glycidyl ether of a polyhydric phenol cured with a nitro-substituted curing agent selected from the group consisting of 2-nitroresorcinol and 5-nitrobenzimidazole at a temperature of up to about 800* C.
Claim 6
Dependent Claim
24 words
The hard graphitelike material obtained by the pyrolysis of the product defined by claim 4 at a temperature of up to about 800* C.
Claim 7
Dependent Claim
88 words
The hard graphitelike material obtained by the pyrolysis of the reaction product of a nitro-substituted epoxy resin defined by the general formula: wherein R is a member selected from the group consisting of H, and and n has a value of 0 to 10 inclusive with a nonnitro-substituted curing agent selected from the group consisting of triethylene tetramine, m-phenylene diamine, p,p''-diamino-diphenyl sulfone, p,p''-methylene dianiline, tetrahydrophthalic anhydride, trimellitic anhydride, boron trifluoride monoethylamine, 3,3'',4, 4''-benzophenone tetracarboxylic dianhydride, and methyl norbornene-2,3-dicarboxylic anhydride at a temperature of up to about 800* C.
Claim 8
Dependent Claim
47 words
The product as defined in claim 1 wherein said glycidyl ether of a polyhydric phenol is selected from the group consisting of a bisphenol-A-epichlorohydrin condensate, resorcinol diglycidyl ether, a polyglycidyl ether of phenol-formaldehyde novalac, a triglycidyl ether of trihydroxy biphenyl and a tetraglycidyl ether of tetraphenylene ethane.
Claim 9
Dependent Claim
31 words
The hard graphitelike material defined in claim 6 wherein said nonnitro-substituted glycidyl ether of a polyhydric phenol is the triglycidyl ether of trihydroxy biphenyl and said nitro-substituted curing agent is 2-nitroresorcinol.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |