US3884736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-base propellant containing an aromatic hydroxy compound
Assignee: United States Department of the Army
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Filing: 1967-04-06
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Granted: 1975-05-20
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Expires: 1987-04-06
Abstract
Abstract 1. In a double base plastisol type propellant containing nitrocellulose and liquid nitrate esters in combination with between 0.5 and 2.0 percent by weight of either 2,4-tolylene diisocyanate or hexamethylene diisocyanate based on the weight of said propellant, the improvement consisting in the incorporation of between 0.5 and 2.0 percent by weight of an aromatic hydroxy compound based on the weight of said diisocyanate, thereby rendering said propellant homogeneous and void-free, said aromatic hydroxy compound selected from the group consisting of 1,3-DIHYDROXY BENZENE, 1,2-DIHYDROXY BENZENE, 1-METHYL-3,5-DIHYDROXY BENZENE, 1,4-DIHYDROXY BENZENE, 1,2,3-TRIHYDROXY BENZENE, 1,3,5-TRIHYDROXY BENZENE, 1,3-DIHYDROXY-2-NITRO-BENZENE, 1-HYDROXY-3-ACETO-BENZENE, 1,3-DIHYDROXY-2-METHYL BENZENE, 1-METHANOL-2-HYDROXY BENZENE, AND 1,3-DIHYDROXY-2,4-NITROSO-BENZENE.
Inventors
- 👤 Joseph S Stack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:46
CPC Classifications
C; C06; C06B; C06B25/00; C06B25/28; C06B25/30; C06B23/00; C06B23/001
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
98 words
IN A DOUBLE BASE PLASTISOL TYPE PROPELLANT CONTAINING NITROCELLULOSE AND LIQUUID NITRATE IN COMBINATION WITH BETWEEN 0.5 AND 2.0 PERCENT BY WEIGHT OF EITHER 2,4-TOLYLENE DIISOCYANATE OR HEXAMETHYLENE DISSOCYANATE BASED ON THE WEIGHT OF SAID PROPELLANT, THE IMPROVEMENT CONSISTING IN THE INCORPORATION OF BETWEEN 0.5 AND 2.0 PERCENT BY WEIGHT OF AN AROMATIC HYDROXY COMPOUND BASEDON THE WEIGHT OF SAID DIISOCYANATE, THEREBY RENDERING SAID PROPELLANT HOMOGENEOUS AND VOID-FREE, SAID AROMATIC HYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,3-DIHYDROXY BENZENE, 1,2-DIHYDROXY BENZENE, 1-METHYL-,5-DIHYDROXY BENZENE, 1,4-DIHYDROXY BENZENE, 1,2,3-TRIHYDROXY BENZENE, 1,3,5-TRIHYDROXY BENZENE, 1,3-DIHYDROXY-2-NITRO-BEMZENE, 1-HYDROXY-3-ACETO-BENZENE, 1-3-DIHYDROXY-2-METHYL BENZENE 1-METHANOL-2-HYDROXY BENZENE, AND 1,3-DIHYDROXY-2,4-NITROSO-BENZENE.
Claim 2
Dependent Claim
98 words
IN A DOUBLE BASE PLASTISOL TYPE PROPELLANT CONTAINING NITROCELLULOSE AND LIQUUID NITRATE IN COMBINATION WITH BETWEEN 0.5 AND 2.0 PERCENT BY WEIGHT OF EITHER 2,4-TOLYLENE DIISOCYANATE OR HEXAMETHYLENE DISSOCYANATE BASED ON THE WEIGHT OF SAID PROPELLANT, THE IMPROVEMENT CONSISTING IN THE INCORPORATION OF BETWEEN 0.5 AND 2.0 PERCENT BY WEIGHT OF AN AROMATIC HYDROXY COMPOUND BASEDON THE WEIGHT OF SAID DIISOCYANATE, THEREBY RENDERING SAID PROPELLANT HOMOGENEOUS AND VOID-FREE, SAID AROMATIC HYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,3-DIHYDROXY BENZENE, 1,2-DIHYDROXY BENZENE, 1-METHYL-,5-DIHYDROXY BENZENE, 1,4-DIHYDROXY BENZENE, 1,2,3-TRIHYDROXY BENZENE, 1,3,5-TRIHYDROXY BENZENE, 1,3-DIHYDROXY-2-NITRO-BEMZENE, 1-HYDROXY-3-ACETO-BENZENE, 1-3-DIHYDROXY-2-METHYL BENZENE 1-METHANOL-2-HYDROXY BENZENE, AND 1,3-DIHYDROXY-2,4-NITROSO-BENZENE.
Claim 3
Dependent Claim
38 words
In the propellant of claim 1 wherein said diisocyanate is present in an amount between 0.5 and 0.75 percent by weight, the improvement wherein said propellant is modified with 0.5 percent by weight of said aromatic hydroxy compound.
Claim 4
Dependent Claim
41 words
In the propellant of claim 1 wherein said diisocyanate is preSent in an amount between 0.76 and 1.5 percent by weight, the improvement wherein said propellant is modified with between 1.0 and 1.5 percent by weight of said aromatic hydroxy compound.
Claim 5
Dependent Claim
38 words
In the propellant of claim 1 wherein said diisocyanate is present in an amount between 1.5 and 2.0 percent by weight, the improvement wherein said propellant is modified with 2.0 percent by weight of said aromatic hydroxy compound.
Claim 6
Dependent Claim
36 words
In the propellant of claim 1 wherein said diisocyanate is present in an amount of 2.0 percent by weight, the improvement wherein said propellant is modified with 2.0 percent by weight of said aromatic hydroxy compound.
Claim 7
Dependent Claim
16 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1,3-dihydroxy benzene.
Claim 8
Dependent Claim
16 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1,2-dihydroxy benzene.
Claim 9
Dependent Claim
16 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1-methyl-3,5-dihydroxy benzene.
Claim 10
Dependent Claim
16 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1,4-dihydroxy benzene.
Claim 11
Dependent Claim
16 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1,2,3-trihydroxy benzene.
Claim 12
Dependent Claim
16 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1,3,5-trihydroxy benzene.
Claim 13
Dependent Claim
15 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1,3-dihydroxy-2-nitro-benzene.
Claim 14
Dependent Claim
15 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1-hydroxy-3-aceto-benzene.
Claim 15
Dependent Claim
16 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1-3-dihydroxy-2-methyl benzene.
Claim 16
Dependent Claim
16 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1-methanol-2-hydroxy benzene.
Claim 17
Dependent Claim
15 words
In the propellant of claim 1, the improvement wherein said propellant is modified with 1,3-dihydroxy-2,4-nitroso-benzene.
References Cited (Backward Citations)
US3002830A
Cited
US3132976A
Cited
US3245849A
Cited
US3141294A
Cited
US3296043A
Cited
US3260631A
Cited
US3215573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |