Patent US5694650A successfully refreshed from Google Patents.
US4012245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast TNT explosive containing polyurethane elastomer which is free from oily exudation and voids and uniformly remeltable
Assignee: United States Department of the Army
•
Filing: 1976-03-08
•
Granted: 1977-03-15
•
Expires: 1996-03-08
Abstract
Abstract A castable explosive containing TNT, which in solidified form is essentially free from oil exudation and voids and can be remelted and reused without loss of homogeneity and explosive properties, is produced by incorporating in the molten TNT explosive a polyurethane elastomer-producing system containing an organic polyisocyanate, a hydroxyl-terminated butadiene polymer liquid resin and an abietyl alcohol.
Inventors
- 👤 H. William Voigt, Jr.
- 👤 Lawrence W. Pell
- 👤 Jean P. Picard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:45
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C08G18/2805; C08G18/2815; C08G18/282; C08G18/2825; Y; Y10; Y10S; Y10S149/00; Y10S149/124
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A castable high explosive composition which is essentially free from oily exudation on storage and voids and can be remelted and resolidified essentially without loss of homogeneity and explosive properties, which consists essentially of an explosive component consisting essentially of 2,4,6-trinitrotoluene and up to about 80% by weight of the explosive component of at least one crystalline explosive of the group cyclotrimethylenetrinitramine and cyclotetramethylenetetranitramine, and from about 0.1 to 5 weight percent of a polyurethane elastomer-producing system consisting essentially of an organic polyisocyanate, a hydroxyl-terminated 1,4-butadiene polymer liquid resin of hydroxyl functionality between 2 and 3, and an abietyl alcohol.
Claim 2
Dependent Claim
100 words
A castable high explosive composition which is essentially free from oily exudation on storage and voids and can be remelted and resolidified essentially without loss of homogeneity and explosive properties, which consists essentially of an explosive component consisting essentially of 2,4,6-trinitrotoluene and up to about 80% by weight of the explosive component of at least one crystalline explosive of the group cyclotrimethylenetrinitramine and cyclotetramethylenetetranitramine, and from about 0.1 to 5 weight percent of a polyurethane elastomer-producing system consisting essentially of an organic polyisocyanate, a hydroxyl-terminated 1,4-butadiene polymer liquid resin of hydroxyl functionality between 2 and 3, and an abietyl alcohol.
Claim 3
Dependent Claim
24 words
The composition of claim 1, wherein the explosive component includes about 0.1 to 2 weight percent of nitrocellulose based on the content of 2,4,6-trinitrotoluene.
Claim 4
Dependent Claim
26 words
The composition according to claim 1, wherein the organic polyisocyanate is a liquid isocyanate-terminated polyether polyurethane obtained by the reaction of tolylene diisocyanate with poly-1,4-butylene glycol.
Claim 5
Dependent Claim
23 words
The composition according to claim 1, wherein the resin is a hydroxyl-terminated butadiene homopolymer of hydroxyl content between about 0.7 and 0.8 meq./g.
Claim 6
Dependent Claim
19 words
The composition according to claim 1, wherein the resin is a hydroxyl-terminated butadiene-styrene copolymer of hydroxyl content 0.65 meq./g.
Claim 7
Dependent Claim
24 words
The composition according to claim 1, wherein the polyurethane elastomer producing system amounts to between about 1 and 5 weight percent of the composition.
Claim 8
Dependent Claim
27 words
The composition according to claim 1, wherein the amount of hydroxyl-terminated resin is between about 0.5 and 2 parts by weight per part of the abietyl alcohol.
References Cited (Backward Citations)
US3141294A
Cited
US3745076A
Cited
US3447980A
Cited
US3554820A
Cited
US3792003A
Cited
US3706609A
Cited
US3785889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |