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US4022746A
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Bis-ethynyl heterocyclic compositions and method of snythesis
Assignee: United States Department of the Air Force
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Filing: 1975-09-10
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Granted: 1977-05-10
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Expires: 1995-09-10
Abstract
Abstract Bis-ethynyl quinoxaline compositions are prepared by the condensation reaction of an aromatic diglyoxyl or dibenzil with an ethynyl-substituted aromatic ortho-diamine. The compositions are useful as polymerizable plasticizers for heterocyclic thermoplastic resins in the fabrication of composites. Polymerizable plasticizers are materials that remain fluid and act as a plasticizer during early stages of fabrication and then polymerize to a rigid resin.
Inventors
- 👤 Robert F. Kovar
- 👤 Fred E. Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:42
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0683; C08G73/0694; C08L; C08L79/00; C08L79/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
56 words
A composition consisting essentially of a polyphenyl quinoxaline thermoplastic having the following formula: ##STR16## wherein n is an integer ranging from about 10 to 200 as determined by the light scattering technique, and about 5 to 30 weight percent, based upon the weight of the thermoplastic, of a bis-ethynyl quinoxaline compound having the following formula: ##STR17##
Claim 2
Dependent Claim
56 words
A composition consisting essentially of a polyphenyl quinoxaline thermoplastic having the following formula: ##STR16## wherein n is an integer ranging from about 10 to 200 as determined by the light scattering technique, and about 5 to 30 weight percent, based upon the weight of the thermoplastic, of a bis-ethynyl quinoxaline compound having the following formula: ##STR17##
Claim 3
Dependent Claim
18 words
The composition of claim 1 in which the Ar and R of the bis-ethynyl quinoxaline compound are ##STR18##
Claim 4
Dependent Claim
18 words
The composition of claim 1 in which the Ar and R of the bis-ethynyl quinoxaline compound are ##STR19##
Claim 5
Dependent Claim
18 words
The composition of claim 1 in which the Ar and R of the bis-ethynyl quinoxaline compound are ##STR20##
Claim 6
Dependent Claim
18 words
The composition of claim 1 in which the Ar and R of the bis-ethynyl quinoxaline compound are ##STR21##
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |