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US4201853A
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Polymeric binders of nitrated phenols and polyisocyanates which reversibly dissociate at elevated temperatures
Assignee: United States Department of the Navy
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Filing: 1978-05-18
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Granted: 1980-05-06
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Expires: 1998-05-18
Abstract
Abstract Polymeric binders for plastic bonded explosives. The binders are prepared from polyfunctional ortho-nitrophenols and polyisocyanates. The binders will reversibly dissociate when subjected to temperatures the range of from 100 DEG to 150 DEG C.
Inventors
- 👤 Ronald A. Henry
- 👤 Eugene C. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:42
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/384; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; Y; Y10; Y10S; Y10S149/00; Y10S149/124
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
The polymers having the structure: (A-B) y wherein y is a positive integer, wherein the linkages between A and B are formed by the reaction of hydroxy groups and isocyanate groups, wherein A is selected from the group consisting of: with R' being selected from the group consisting of CH 3 , C 2 H 5 , n-C 4 H 9 , n-C 5 H 11 , n-C 6 H 13 , and n-C 7 H 15 , and x being a positive integer selected from 6 and 10 and wherein B is selected from the group consisting of: ##STR19## said polymers being reversibly dissociable.
Claim 2
Dependent Claim
105 words
The polymers having the structure: (A-B) y wherein y is a positive integer, wherein the linkages between A and B are formed by the reaction of hydroxy groups and isocyanate groups, wherein A is selected from the group consisting of: with R' being selected from the group consisting of CH 3 , C 2 H 5 , n-C 4 H 9 , n-C 5 H 11 , n-C 6 H 13 , and n-C 7 H 15 , and x being a positive integer selected from 6 and 10 and wherein B is selected from the group consisting of: ##STR19## said polymers being reversibly dissociable.
Claim 3
Dependent Claim
15 words
The polymers according to claim 1 wherein A is ##STR20## and wherein B is ##STR21##
Claim 4
Dependent Claim
15 words
The polymers according to claim 1 wherein A is ##STR22## and wherein B is ##STR23##
Claim 5
Dependent Claim
15 words
The polymers according to claim 1 wherein A is ##STR24## and wherein B is ##STR25##
Claim 6
Dependent Claim
14 words
A polymer according to claim 2 wherein R' is C 6 H 13 .
Claim 7
Dependent Claim
14 words
A polymer according to claim 2 wherein R' is C 7 H 15 .
References Cited (Backward Citations)
US3020261A
Cited
US3079355A
Cited
US3245849A
Cited
US3245962A
Cited
US3288863A
Cited
US3681290A
Cited
US3778320A
Cited
US3909497A
Cited
US3968723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |