US4124418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siloxane-coated ammonium perchlorate and propellant compositions made therewith
Assignee: ATK Launch Systems LLC
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Filing: 1973-04-19
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Granted: 1978-11-07
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Expires: 1993-04-19
Abstract
Abstract Ammonium perchlorate particles having strongly adherent wettable coatings are made by treating the particles with stong amines that displace ammonia to form amine perchlorates at the particle surfaces. Silanylamines are preferred since after amination of the perchlorate the silane groups can be hydrolyzed to siloxanes having good wettability by liquid polymeric propellant binders. The coated perchlorate can be used to produce solid propellants having improved mechanical properties and burning characteristics.
Inventors
- 👤 Russell Reed, Jr.
- 👤 Robert E. Meyer
- 👤 Graham C. Shaw
- 👤 Richard P. Cornia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:49
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/18; C06B45/30; C06B45/32
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
31 words
Finely divided ammonium perchlorate, the particles of which are coated with a strongly adherent coating consisting essentially of a perchlorate of an amine selected from alkylamines, aminoalkylamines, hydroxyalkylamines, mercaptoalkylamines and silanylalkylamines.
Claim 2
Dependent Claim
31 words
Finely divided ammonium perchlorate, the particles of which are coated with a strongly adherent coating consisting essentially of a perchlorate of an amine selected from alkylamines, aminoalkylamines, hydroxyalkylamines, mercaptoalkylamines and silanylalkylamines.
Claim 3
Dependent Claim
20 words
Finely divided ammonium perchlorate according to claim 1 wherein the coating on the particles consists essentially of an aminoalkylamine perchlorate.
Claim 4
Dependent Claim
20 words
Finely divided ammonium perchlorate according to claim 1 wherein the coating on the particles consists essentially of a hydroxyalkylamine perchlorate.
Claim 5
Dependent Claim
20 words
Finely divided ammonium perchlorate according to claim 1 wherein the coating on the particles consists essentially of a siloxyalkylamine perchlorate.
Claim 6
Dependent Claim
20 words
Finely divided ammonium perchlorate according to claim 1 wherein the coating on the particles consists essentially of an alkylamine perchlorate.
Claim 7
Independent Claim
42 words
A method of making coated particles of ammonium perchlorate which comprises reacting finely divided ammonium perchlorate particles with a strong amine capable of displacing ammonia from said ammonium perchlorate to produce a coating of amine perchlorate on the surface of said particles.
Claim 8
Independent Claim
42 words
A method of making coated particles of ammonium perchlorate which comprises reacting finely divided ammonium perchlorate particles with a strong amine capable of displacing ammonia from said ammonium perchlorate to produce a coating of amine perchlorate on the surface of said particles.
Claim 9
Dependent Claim
18 words
A method according to claim 6 wherein said amine is selected from alkylamines, aminoalkylamines, hydroxylalkylamines, mercaptoalkylamines and silanylalkylamines.
Claim 10
Dependent Claim
20 words
A method according to claim 7 wherein said reaction is carried out at a temperature of 50° to 150° F.
Claim 11
Independent Claim
81 words
A method of making coated particles of ammonium perchlorate which comprises mixing finely divided particles of ammonium perchlorate with a solution in a halocarbon solvent of an amine selected from alkylamines, aminoalkylamines, hydroxyalkylamines, mercaptoalkylamines and silanylalkylamines to cause said amine to react with said ammonium perchlorate to form a coating of the perchlorate of said amine on the surfaces of said particles, separating said coated particles from said solution, and evaporating residual solvent from said particles to form a free-flowing powder.
Claim 12
Independent Claim
81 words
A method of making coated particles of ammonium perchlorate which comprises mixing finely divided particles of ammonium perchlorate with a solution in a halocarbon solvent of an amine selected from alkylamines, aminoalkylamines, hydroxyalkylamines, mercaptoalkylamines and silanylalkylamines to cause said amine to react with said ammonium perchlorate to form a coating of the perchlorate of said amine on the surfaces of said particles, separating said coated particles from said solution, and evaporating residual solvent from said particles to form a free-flowing powder.
Claim 13
Dependent Claim
29 words
A method according to claim 9 wherein said amine is a silanylalkylamine and water is added to the reaction mixture to form a siloxylamine perchlorate coating on said particles.
Claim 14
Dependent Claim
46 words
A solid propellant composition comprising a major amount of finely divided ammonium perchlorate particles dispersed in a minor amount of a polymeric elastomeric fuel-binder, said particles being coated with a thin layer of a perchlorate of an amine selected from alkylamines, aminoalkylamines, hydroxyalkylamines, mercaptoalkylamines and silanylalkylamines.
Claim 15
Dependent Claim
46 words
A solid propellant composition comprising a major amount of finely divided ammonium perchlorate particles dispersed in a minor amount of a polymeric elastomeric fuel-binder, said particles being coated with a thin layer of a perchlorate of an amine selected from alkylamines, aminoalkylamines, hydroxyalkylamines, mercaptoalkylamines and silanylalkylamines.
Claim 16
Dependent Claim
19 words
A solid propellant according to claim 11 wherein the ammonium perchlorate particles are coated with a siloxanated amine perchlorate.
Claim 17
Dependent Claim
33 words
Finely divided ammonium perchlorate, the particles of which are coated with a strongly adherent coating consisting essentially of an amine perchlorate, said coated particles having been made by the method of claim 9.
Claim 18
Dependent Claim
20 words
Finely divided coated ammonium perchlorate particles as described in claim 1 wherein the amine perchlorate is a perchlorate of silylpropyl-ethylenediamine.
Claim 19
Dependent Claim
20 words
Finely divided coated ammonium perchlorate particles as described in claim 1 wherein the amine perchlorate is a perchlorate of 1,6-hexanediamine.
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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |