US4116734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite explosives
Assignee: Department of National Defence
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Filing: 1977-10-07
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Granted: 1978-09-26
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Expires: 1997-10-07
Abstract
Abstract The disclosed invention is a gravity pourable explosive composition comprising a solid explosive ingredient, a polybutadiene based binder cured with a diisocyanate, and an organofunctional silane. The explosive composition according to the invention exhibits improved physical properties e.g. viscosity and gel time, which facilitates product, particularly at low temperatures; and improved mechanical properties eg. elongation and strain.
Inventors
- 👤 Guy Perrault
- 👤 Raynald Francoeur
- 👤 Roger Lavertu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:15
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
49 words
A gravity pourable explosive composition, comprising a solid explosive ingredient selected from the group consisting of cyclotrimethylenetrinitramine (RDX) and cyclotetramethylenetetranitramine (HMX), a hydroxy-terminated polybutadiene based binder cured with a diisocyanate, and an organofunctional silane selected from the group consisting of gamma-methacryloxypropyltrimethoxy silane, beta-3,4-(epoxy-cyclohexyl)ethyltrimethoxy silane, gamma-glycidoxypropyltrimethoxy silane, trimethychlorosilane and N,O-bis-(trimethylsilyl)-acetamide.
Claim 2
Dependent Claim
49 words
A gravity pourable explosive composition, comprising a solid explosive ingredient selected from the group consisting of cyclotrimethylenetrinitramine (RDX) and cyclotetramethylenetetranitramine (HMX), a hydroxy-terminated polybutadiene based binder cured with a diisocyanate, and an organofunctional silane selected from the group consisting of gamma-methacryloxypropyltrimethoxy silane, beta-3,4-(epoxy-cyclohexyl)ethyltrimethoxy silane, gamma-glycidoxypropyltrimethoxy silane, trimethychlorosilane and N,O-bis-(trimethylsilyl)-acetamide.
Claim 3
Dependent Claim
10 words
An explosive composition according to claim 1, including a plasticizer.
Claim 4
Dependent Claim
20 words
An explosive composition according to claim 2, wherein the plasticizer is selected from the group consisting of diethylhexylazelate and dioctyladipate.
Claim 5
Dependent Claim
22 words
An explosive composition according to claim 3, wherein the amount of explosive solid in the composition is in the range of 70-85%/w.
Claim 6
Dependent Claim
32 words
An explosive composition according to claim 4, wherein the diisocyanate is selected from the group consisting of toluene diisocyanate, isophoronediisocyanate and a diisocyanate intermediate made from a 36-carbon dimer aliphatic dibasic acid.
Claim 7
Dependent Claim
43 words
An explosive composition according to claim 5, wherein the binder comprises an hydroxyl terminated polybutadiene selected from the group consisting of compounds of the structural formula: ##STR2## wherein n = 44-65 and the polybutadiene structure is 60% trans-1,4, 20% cis-1,4, and 20% vinyl-1,2.
Claim 8
Dependent Claim
18 words
An explosive composition according to claim 6, wherein the ratio of NCO/OH is about 0.85 to about 1.3.
Claim 9
Dependent Claim
15 words
An explosive composition according to claim 7, wherein the ratio of NCO/OH is about 1.15.
Claim 10
Dependent Claim
20 words
An explosive composition according to claim 1, additionally comprising an emulsifier selected from the group consisting of lecithin and asolectin.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |