US3878002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogen and fluorine containing solid propellant compositions based on acrylic prepolymer binders
Assignee: United States Department of the Army
•
Filing: 1969-06-24
•
Granted: 1975-04-15
•
Expires: 1989-06-24
Abstract
Abstract Nitrogen and fluorine containing solid propellant compositions may be based on NF acrylic prepolymers rather than monomer polymerization. The prepolymers used to make the propellant compositions desired consist of certain acrylates such as 2,3bis(difluoraminopropyl) acrylate with minor amounts of either acrylic acid or an hydroxyl-containing acrylate or methacrylate such as hydroxypropyl methacrylate together with an appropriate plasticizer. The propellant formed from the NF prepolymer systems avoids the cure problems encountered with propellant compositions based on monomer polymerization.
Inventors
- 👤 Mart G Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:41
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A PROPELLANT COMPOSITION COMPRISING A CURED INTIMATE MIXTURE OF FROM ABOUT 30% TO ABOUT 60% BY WEIGHT SOLID, INORGANIC, OXIDIZING SALT, AND FROM ABOUT 8% TO ABOUT 16% BY WEIGHT PF A POLYMER, SAID POLYMER BEING A REACTION PRODUCT OF AN ACRYLATE OR AN ALKYL ACRYLATE WITH AT LEAST ONE OF THE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF AN ACRYLIC ACID, AN HYDROXYL-CONTAINING ACRYLATE AND AN HYDROXYL-CONTAININGMETHACRYLATE, SAID ACRYLATE BEING AN ACRYLATE OF NF2CONTAINING POLUMERS AND SAID ALKYL ACRYLATE BEING SELECTED FORM MTHYL, ETHYL, BUTYL, AND 2-ETHYLHEXYL ACRYLATES.
Claim 2
Dependent Claim
89 words
A PROPELLANT COMPOSITION COMPRISING A CURED INTIMATE MIXTURE OF FROM ABOUT 30% TO ABOUT 60% BY WEIGHT SOLID, INORGANIC, OXIDIZING SALT, AND FROM ABOUT 8% TO ABOUT 16% BY WEIGHT PF A POLYMER, SAID POLYMER BEING A REACTION PRODUCT OF AN ACRYLATE OR AN ALKYL ACRYLATE WITH AT LEAST ONE OF THE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF AN ACRYLIC ACID, AN HYDROXYL-CONTAINING ACRYLATE AND AN HYDROXYL-CONTAININGMETHACRYLATE, SAID ACRYLATE BEING AN ACRYLATE OF NF2CONTAINING POLUMERS AND SAID ALKYL ACRYLATE BEING SELECTED FORM MTHYL, ETHYL, BUTYL, AND 2-ETHYLHEXYL ACRYLATES.
Claim 3
Dependent Claim
10 words
The propellant composition of claim 1 additionally comprising a plasticizer.
Claim 4
Dependent Claim
23 words
The propellant composition of claim 2 wherein said plasticizer is present in an amount of from about 20% to about 40% by weight.
Claim 5
Dependent Claim
13 words
The propellant composition of claim 3 wherein said plasticizer is an NF2-containing plasticizer.
Claim 6
Dependent Claim
13 words
The propellant composition of claim 4 wherein said acrylate is 2,3-bis (difluoroamino)-propyl acrylate.
Claim 7
Dependent Claim
20 words
The propellant composition of claim 5 wherein said plasticizer is 1,2,3-tris(1,2-bis(difluoramino)ethoxy) propane, and said inorganic, oxidizing salt is ammonium perchlorate.
Claim 8
Dependent Claim
19 words
The propellant composition of claim 5 wherein said plasticizer is 1,2,2,5,6,9,9,10-octakis(difluoramino)-4,7-dioxadecane and said inorganic, oxidizing salt is ammonium perchlorate.
Claim 9
Dependent Claim
23 words
The propellant composition of claim 3 wherein said polymer is crosslinked with a diepoxide curing agent and the selected compound is acrylic acid.
Claim 10
Dependent Claim
23 words
The propellant composition of claim 8 wherein said polymer is crosslinked with a diisocyanate curing agent and the selected comound is hydroxypropyl methacrylate.
Claim 11
Dependent Claim
75 words
The propellant composition of claim 1 wherein said polymer is comprised of a combination of a reaction product of said acrylate with at least one of the compounds selected from the group consisting of an acrylic acid, an hydroxyl-containing acrylate, and an hydroxyl-containing methacrylate and a reaction product of said alkyl acrylate with at least one of the compounds selected from the group consisting of an acrylic acid, an hydroxyl-containing acrylate, and an hydroxyl-containing methacrylate.
References Cited (Backward Citations)
US3441549A
Cited
US3441550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |