US4707199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non nitroglycerin-containing composite-modified double-base propellant
Assignee: United States Department of the Army
•
Filing: 1983-10-17
•
Granted: 1987-11-17
•
Expires: 2003-10-17
Abstract
Abstract The glycidyl azide polymer produced by hydrolysis of glycidyl chloride followed by reaction with sodium azide is employed in a crosslinked composite-modified double-base propellant composition both in the casting powder portion and casting solvent portion as a superior replacement for nitroglycerin in each portion specified. The crosslinked composite-modified double-base propellant composition is characterized by having a greater safety in handling, reduced sensitivity to detonation, higher burning rate, higher specific impulse, and improved mechanical properties as compared with a like composition containing nitroglycerin in the casting powder and the casting solvent portions.
Inventors
- 👤 David C. Sayles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:24
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A crosslinked composite-modified double-base propellant composition comprising a casting powder portion and a casting solvent portion, said casting powder portion comprising about 72.0 weight percent of said propellant composition and said casting solvent portion comprising about 28.0 weight percent of said propellant composition, said casting powder portion comprised in part by weight of ingredients as follows: ______________________________________
nitrocellulose (12.5% nitrogen)
16.6
carboranylmethyl propionate
4.7
triacetin 17.5
2-nitrodiphenylamine 1.1
resorcinol 0.7
ammonium perchlorate (1 μm)
32.8
aluminum (20 μm) 7.2
aluminum staple (whiskers) 2.7
glycidyl azide polymer formed from hydrolysis
16.0
of glycidyl chloride followed by reaction with
sodium azide
______________________________________ , and said casting solvent portion comprised in parts by weight of ingredients as follows: ______________________________________
glycidyl azide 45.8
triacetin 52.7
hexane diisocyanate
0.50
triphenylbismuthine
0.07
______________________________________ , said crosslinked composite-modified double-base propellant composition characterized by having greater safety in handling, reduced sensitivity to detonation, higher burning rate, higher specific impulse, and improved mechanical properties as compared with a like composition containing nitroglycerin in said casting powder portion and in said casting solvent portion in equivalent molar weight amounts to said glycidyl azide polymer.
Claim 2
Dependent Claim
184 words
A crosslinked composite-modified double-base propellant composition comprising a casting powder portion and a casting solvent portion, said casting powder portion comprising about 72.0 weight percent of said propellant composition and said casting solvent portion comprising about 28.0 weight percent of said propellant composition, said casting powder portion comprised in part by weight of ingredients as follows: ______________________________________
nitrocellulose (12.5% nitrogen)
16.6
carboranylmethyl propionate
4.7
triacetin 17.5
2-nitrodiphenylamine 1.1
resorcinol 0.7
ammonium perchlorate (1 μm)
32.8
aluminum (20 μm) 7.2
aluminum staple (whiskers) 2.7
glycidyl azide polymer formed from hydrolysis
16.0
of glycidyl chloride followed by reaction with
sodium azide
______________________________________ , and said casting solvent portion comprised in parts by weight of ingredients as follows: ______________________________________
glycidyl azide 45.8
triacetin 52.7
hexane diisocyanate
0.50
triphenylbismuthine
0.07
______________________________________ , said crosslinked composite-modified double-base propellant composition characterized by having greater safety in handling, reduced sensitivity to detonation, higher burning rate, higher specific impulse, and improved mechanical properties as compared with a like composition containing nitroglycerin in said casting powder portion and in said casting solvent portion in equivalent molar weight amounts to said glycidyl azide polymer.
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) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |