US3790416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite propellant including (u) polyfunctional amine
Assignee: Hercules LLC
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Filing: 1970-07-22
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Granted: 1974-02-05
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Expires: 1990-07-22
Abstract
Abstract Propellant compositions are provided in which dewetting of the propellant composition under applied stress is substantially reduced. Reduced dewetting is achieved through the use of polyfunctional amines which are capable of forming a chemical bond between the oxidizer (oxygen containing ammonium salt) and the binder in the cured propellant.
Inventors
- 👤 H Dehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:06
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/001; C06B45/00; C06B45/04; C06B45/06; C06B45/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
21 words
The composite propellant composition of claim 1 in which the polyfunctional amine is of the general formula (I) wherein X is
Claim 2
Dependent Claim
12 words
The propellant composition of claim 1 wherein the polyfunctional amine is triethylenetetramine.
Claim 3
Dependent Claim
12 words
The propellant composition of claim 1 wherein the polyfunctional amine is tetraethylenepentamine.
Claim 4
Dependent Claim
12 words
The propellant composition of claim 1 wherein the polyfunctional amine is diethylenetriamine.
Claim 5
Dependent Claim
12 words
The propellant composition of claim 1 wherein the polyfunctional amine is polyethyleneimine.
Claim 6
Dependent Claim
14 words
The propellant composition of claim 1 wherein the polyfunctional amine is Beta -(4-aminophenyl) ethylamine.
Claim 7
Dependent Claim
36 words
The composite propellant composition of claim 1 wherein the oxygen containing ammonium salt is ammonium perchlorate, the crosslinkable binder prepolymer is a carboxyl terminated prepolymer, and the crosslinking agent is a mixture of diepoxides and triepoxides.
Claim 8
Dependent Claim
15 words
The composite propellant composition of claim 8 wherein the polyfunctional amine is Beta -(4-aminophenyl) ethylamine.
Claim 9
Dependent Claim
32 words
The composite propellant composition of claim 1 wherein the oxygen containing ammonium salt is ammonium perchlorate, the crosslinkable binder prepolymer is a hydroxyl terminated prepolymer, and the crosslinking agent is a polyisocyanate.
Claim 10
Dependent Claim
32 words
The composite propellant composition of claim 1 wherein the oxygen containing ammonium salt is ammonium perchlorate, the crosslinkable binder prepolymer is a carboxyl terminated prepolymer, and the crosslinking agent is a polyimine.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |