US3791892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Castable polyurethane composite propellants
Assignee: United States Department of the Navy
•
Filing: 1966-01-24
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Granted: 1974-02-12
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Expires: 1986-01-24
Abstract
Abstract A solid propellant with a polyurethane resin binder made from the reaction of a di-isocyanate compound and the condensation product of 1,2-polyoxybutylene glycol with an alkanedioic acid.
Inventors
- 👤 A Hammond
- 👤 H Lobowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:10
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4244; C08G18/4247; C08G18/4252; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C08G18/65; C08G18/66; C08G18/6633; C08G18/70; C08G18/72; C08G18/77; C08G18/78
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
34 words
The composition of claim 1 wherein the organic compound is an organic diisocyanate selected from the group consisting of substituted and unsubstituted alkane, alkene, alkylidene, cycloalkylene, cycloalkylidene, aromatic, alkane ether, pyridine and nitrazaalkylene diisocyanates.
Claim 2
Dependent Claim
20 words
The composition of claim 2 wherein member (b) is a hydroxy-terminated polyester formed by condensing sebacic acid with 1,2-polyoxybutylene glycol.
Claim 3
Dependent Claim
11 words
The composition of claim 3 wherein the organic compound is toluene-2,4-diisocyanate.
Claim 4
Dependent Claim
11 words
The composition of claim 3 wherein the organic compound is 3-nitrazapentane-1,5-diisocyanate.
Claim 5
Dependent Claim
13 words
The composition of claim 3 wherein the organic compound is 1, 6-hexane diisocyanate.
Claim 6
Dependent Claim
10 words
The composition of claim 3 further including a solid fuel.
Claim 7
Dependent Claim
18 words
The composition of claim 7 wherein the solid oxidizer is ammonium perchlorate and the solid fuel is aluminum.
Claim 8
Dependent Claim
64 words
A solid propellant of the composite type comprising from about 45-95 weight percent of a solid oxidizer and from about 5-55 weight percent of a crosslinked polyurethane binder, said polyurethane being the reaction product of an organic compound having as its sole reacting groups two isocyanate groups and a member selected from the hydroxy-terminated polyesters formed by condensing 1,2-polyoxybutylene glycol with an alkanedioic acid.
Claim 9
Dependent Claim
34 words
The propellant of claim 9 wherein said organic compound is an organic diisocyanate selected From the group consisting of substituted and unsubstituted alkane, alkene, alkylidene, cycloalkylene, cycloalkylidene, aromatic, alkane ether, pyridine and nitrazalkylene diisocyanates.
Claim 10
Dependent Claim
20 words
The propellant of claim 9 wherein said member is a hydroxy-terminated ester formed by condensing 1,2-polyoxybutylene glycol with sebacic acid.
Claim 11
Dependent Claim
11 words
The propellant of claim 11 wherein the organic compound is toluene-2,4-diisocyanate.
Claim 12
Dependent Claim
11 words
The propellant of claim 11 wherein the organic compound is 3-nitrazapentane-1,5-diisocyanate.
Claim 13
Dependent Claim
12 words
The propellant of claim 11 wherein the organic compound is 1,6-hexane diisocyanate.
Claim 14
Dependent Claim
12 words
The propellant of claim 11 wherein the binder contains a solid fuel.
Claim 15
Dependent Claim
18 words
The propellant of claim 15 wherein the solid oxidizer is ammonium perchlorate and the solid fuel is aluminum.
Claim 16
Dependent Claim
68 words
A purpose for preparing a solid propellent of the composite type comprising: a. blending a member selected from the hydroxy-terminated polyesters formed by condensing 1,2-polyoxybutylene glycol with an alkanedioic acid with a crosslinking agent, b. blending a solid oxidizer into the mixture of (a), c. blending an organic compound having as its sole reacting groups two isocyanate groups into the mixture of (b), and d. curing mixture (c).
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |