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Patent US4482410A successfully refreshed from Google Patents.
US4482410A
Expired / Lapsed
US
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Plasticizer system for propellant compositions
Assignee: United States Department of the Air Force
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Filing: 1983-05-23
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Granted: 1984-11-13
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Expires: 2003-05-23
Abstract
Abstract This invention discloses the synthesis of a polytetramethyleneglycol pivalate polyether and its use as a plasticizer for propellant compositions.
Inventors
- 👤 William D. Stephens
- 👤 Linda E. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:31
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/284; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C08G18/67; C08G18/69
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A solid propellant composition comprising a cured homogenous mixture of: A. a solid, particulate oxidizer component; B. a synthetic resinous, polyisocyanate cured, polybutadiene binder component; and C. a polytetramethyleneglycol pivalate ester plasticizer having the following structual formula: ##STR4## wherein n is an integer of from 6 to 12 and said plasticizer is present in a binder/plasticizer ratio ranging from about 75 to 95 parts by weight of binder to 5 to 25 parts by weight of plasticizer.
Claim 2
Dependent Claim
77 words
A solid propellant composition comprising a cured homogenous mixture of: A. a solid, particulate oxidizer component; B. a synthetic resinous, polyisocyanate cured, polybutadiene binder component; and C. a polytetramethyleneglycol pivalate ester plasticizer having the following structual formula: ##STR4## wherein n is an integer of from 6 to 12 and said plasticizer is present in a binder/plasticizer ratio ranging from about 75 to 95 parts by weight of binder to 5 to 25 parts by weight of plasticizer.
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) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |