US3933542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocket propellant with acrylate binder and difluoroamino plasticizer
Assignee: United States Department of the Navy
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Filing: 1972-06-16
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Granted: 1976-01-20
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Expires: 1992-06-16
Abstract
Abstract High energy, low radar attenuation propellant comprising (1) 25-55 weight rcent of a binder which itself comprises from 2-25 weight percent of a copolymer of acrylic acid and a lower alkyl acrylate and 75-98 weight percent of an energetic difluoroamino group containing plasticizer, (2) 0-15 weight percent aluminum or boron (3) 45-75 weight percent of an oxidizer and (4) 1/2-5 weight percent curing agent.
Inventors
- 👤 Lewis B. Childs, Jr.
- 👤 James D. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:35
CPC Classifications
C; C06; C06B; C06B33/00; C06B33/02; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
130 words
A solid rocket propellant comprising (1) about 25-55 weight percent of a binder which comprises (a) about 2-25 weight percent of a polymer which comprises about one to about 20 weight percent acrylic acid with the remainder comprising a lower alkyl acrylate and (b) about 75-98 weight percent of an energetic difluoroamino group containing plasticizer, selected from the group consisting of 1,2,3-tris[α,β-bis (difluoroamino) ethoxy] propane, hexakis (difluoroamino) propylether, 1,2-di[2,2,3-tris(difluoroamino) propoxy]-1,2-bis(difluoroamino)ethane, 1,2,4,5-tetrakis(difluoroamino)amyl methacrylate and mixtures thereof, (2) about 0-15 weight percent of a fuel selected from the group consisting of aluminum, boron and mixtures thereof, (3) about 45-75 weight percent of an oxidizer, and (4) about 1/2-5 weight percent curing agent, provided that the amount of oxidizer present be sufficient to provide for complete oxidation of said binder and said fuel.
Claim 2
Dependent Claim
130 words
A solid rocket propellant comprising (1) about 25-55 weight percent of a binder which comprises (a) about 2-25 weight percent of a polymer which comprises about one to about 20 weight percent acrylic acid with the remainder comprising a lower alkyl acrylate and (b) about 75-98 weight percent of an energetic difluoroamino group containing plasticizer, selected from the group consisting of 1,2,3-tris[α,β-bis (difluoroamino) ethoxy] propane, hexakis (difluoroamino) propylether, 1,2-di[2,2,3-tris(difluoroamino) propoxy]-1,2-bis(difluoroamino)ethane, 1,2,4,5-tetrakis(difluoroamino)amyl methacrylate and mixtures thereof, (2) about 0-15 weight percent of a fuel selected from the group consisting of aluminum, boron and mixtures thereof, (3) about 45-75 weight percent of an oxidizer, and (4) about 1/2-5 weight percent curing agent, provided that the amount of oxidizer present be sufficient to provide for complete oxidation of said binder and said fuel.
Claim 3
Dependent Claim
28 words
The composition of claim 1 wherein said copolymer portion of said binder contains about 6-8 weight percent of acrylic acid with the remainder comprising a lower alkyl acrylate.
Claim 4
Dependent Claim
24 words
The composition of claim 2 wherein said lower alkyl acrylate is selected from the group consisting of methyl acrylate, ethyl acrylate and butyl acrylate.
Claim 5
Dependent Claim
13 words
The composition of claim 2 wherein said lower alkyl acrylate is ethyl acrylate.
Claim 6
Dependent Claim
29 words
The composition of claim 1 wherein said copolymer has an intrinsic viscosity of about 0.2-1.1 dl/g as a 0.5 gram per deciliter solution in ethyl acetate at about 25°C.
Claim 7
Dependent Claim
32 words
The composition of claim 1 wherein said copolymer has an intrinsic viscosity of about 0.4 - 0.8 dl/g as about a 0.5 gram per deciliter solution in ethyl acetate at about 25°C.
Claim 8
Dependent Claim
10 words
The composition of claim 1 wherein said fuel is aluminum.
Claim 9
Dependent Claim
17 words
The composition of claim 1 wherein said fuel constitutes about 1-15 weight percent of said rocket propellant.
Claim 10
Dependent Claim
10 words
The composition of claim 2 wherein said fuel is aluminum.
Claim 11
Dependent Claim
36 words
The composition of claim 1 wherein said oxidizer is selected from the group consisting of ammonium perchlorate, nitronium perchlorate, hydroxylammonium perchlorate and its derivatives, hydroxylammonium nitrate and its derivatives, potassium perchlorate, ammonium nitrate and potassium nitrate.
Claim 12
Dependent Claim
11 words
The composition of claim 1 wherein said oxidizer is ammonium perchlorate.
Claim 13
Dependent Claim
21 words
The composition of claim 1 wherein said curing agent is selected from the group consisting of difunctional epoxides, and trifunctional epoxides.
Claim 14
Dependent Claim
29 words
The composition of claim 1 wherein said curing agent is selected from the group consisting of ##SPC3## bisphenol A - epichlorohydrin epoxides, tolylene diisocyanate, hexamethylene diisocyanate and mixtures thereof.
Claim 15
Independent Claim
146 words
A method of reducing the combustion instability of a solid rocket propellant comprising (1) about 2-25 weight percent of a binder which comprises (a) 2-25 weight percent of a polymer which comprises about one to about 20 weight percent acrylic acid and with the remainder comprising a lower alkyl acrylate and (b) about 75-98 weight percent of an energetic difluoroamino group containing plasticizer selected from the group consisting of 1,2,3-tris[α,β-bis (difluoroamino) ethoxy] propane, hexakis (difluoroamino) propylether, 1,2-di[2,2,3-tris (difluoroamino) propoxy]-1,2-bis(difluoroamino)ethane, 1,2,4,5-tetrakis (difluoroamino)amyl methacrylate and mixtures thereof, (2) about 45-75 weight percent of an oxidizer, and (3) about 1/2-5 weight percent curing agent comprising adding to said propellant 1-15 weight percent of a material selected from the group consisting of aluminum, boron and mixtures thereof provided the amount of oxidizer present is sufficient to provide for complete oxidation of said binder and said aluminum, boron and mixtures thereof.
Claim 16
Independent Claim
146 words
A method of reducing the combustion instability of a solid rocket propellant comprising (1) about 2-25 weight percent of a binder which comprises (a) 2-25 weight percent of a polymer which comprises about one to about 20 weight percent acrylic acid and with the remainder comprising a lower alkyl acrylate and (b) about 75-98 weight percent of an energetic difluoroamino group containing plasticizer selected from the group consisting of 1,2,3-tris[α,β-bis (difluoroamino) ethoxy] propane, hexakis (difluoroamino) propylether, 1,2-di[2,2,3-tris (difluoroamino) propoxy]-1,2-bis(difluoroamino)ethane, 1,2,4,5-tetrakis (difluoroamino)amyl methacrylate and mixtures thereof, (2) about 45-75 weight percent of an oxidizer, and (3) about 1/2-5 weight percent curing agent comprising adding to said propellant 1-15 weight percent of a material selected from the group consisting of aluminum, boron and mixtures thereof provided the amount of oxidizer present is sufficient to provide for complete oxidation of said binder and said aluminum, boron and mixtures thereof.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |