US4013596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive tetrazole polymers and process of making therefor
Assignee: United States Department of the Army
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Filing: 1975-03-07
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Granted: 1977-03-22
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Expires: 1995-03-07
Abstract
Abstract New tetrazole polymers are formed from a self-polymerization condensation action effected by adding tetrazoles of the formula below to a solution containing an equivalent of base or slightly less than an equivalent and heating for about 5 days at temperatures of 50°-100° C: ##STR1## where Z is CH 2 CH 2 X or NHCOCH 2 , and where X is Br, Cl, or I. The polytetrazoles serve as binders in propellant systems and also supply added energy thereto.
Inventors
- 👤 Fred J. Einberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:42
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0605
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
Process for forming tetrazole polymers comprising adding substances of the formula ##STR4## where X is a member selected from the group consisting of Br, Cl, and I to a medium where base is present in a molar equivalent amount to said 5-(2-haloethyl) tetrazole or slightly less than a molar equivalent amount and then heating said medium at 50°-100° C for a minimum of 5 days to form resulting tetrazole polymers whose inherent viscosity at 25° C is a number from about 0.03 - 0.36.
Claim 2
Dependent Claim
84 words
Process for forming tetrazole polymers comprising adding substances of the formula ##STR4## where X is a member selected from the group consisting of Br, Cl, and I to a medium where base is present in a molar equivalent amount to said 5-(2-haloethyl) tetrazole or slightly less than a molar equivalent amount and then heating said medium at 50°-100° C for a minimum of 5 days to form resulting tetrazole polymers whose inherent viscosity at 25° C is a number from about 0.03 - 0.36.
Claim 3
Dependent Claim
13 words
Process for forming tetrazole polymers according to claim 1 where X is chlorine.
Claim 4
Dependent Claim
17 words
Process according to claim 2 where the reaction medium is formed of potassium hydroxide in methyl alcohol.
Claim 5
Dependent Claim
16 words
Process according to claim 2 where the reaction medium is formed of sodium hydride in dimethylformamide.
Claim 6
Dependent Claim
46 words
Tetrazole polymers of the formula ##STR5## where X is a member selected from the group consisting of Br, Cl, or I, and η is an integer such that the inherent viscosity of said tetrazole polymers at 25° C is a number from about 0.03 - 0.36.
Claim 7
Dependent Claim
46 words
Tetrazole polymers of the formula ##STR5## where X is a member selected from the group consisting of Br, Cl, or I, and η is an integer such that the inherent viscosity of said tetrazole polymers at 25° C is a number from about 0.03 - 0.36.
Claim 8
Dependent Claim
10 words
Tetrazole polymer according to claim 5 where X is Cl.
References Cited (Backward Citations)
US3386968A
Cited
US3929684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |