Nitrocellulose Patents (Class 149/79)
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Publication number: 20140238258Abstract: A colored pyrotechnic smoke-producing composition has an oxidizer, a fuel, a flame retardant, a dye, a coolant, and a binder. The oxidizer may be potassium chlorate. The fuel may be starch, dextrose, lactose, and/or sucrose. The coolant may be sodium bicarbonate or magnesium carbonate. The binder may be nitrocellulose or a halogen-free thermoplastic. The flame retardant may be one or more nitrogen-rich compounds. The composition may be in pelletized form or in the form of a solid charge. The composition may consist of on a mass basis oxidizer 20-35%, fuel 15-25%, flame retardant 5-15%, dye 27-40%, coolant 8-18%, and binder 1-2%. The invention may be a device consisting of a body filled with the composition and a first fire starter composition, and an attached squib igniter. The body may be a grenade. A process for producing the composition is also disclosed.Type: ApplicationFiled: February 26, 2013Publication date: August 28, 2014Inventor: Lucian Stoenescu
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Patent number: 8545646Abstract: The present disclosure relates to a high-density rocket propellant and associated recoilless launching systems and methods with tungsten powder added providing substantial mass to the propellant for additional impulse, absorption of sound, optimization of back blast and carry weight, and the like. In an exemplary embodiment, the high-density rocket propellant includes tungsten mass percentages of between about 70%-about 80%, equivalent to about 17%-about 26% by volume.Type: GrantFiled: September 24, 2009Date of Patent: October 1, 2013Assignee: The United States of America as Represented by the Secretary of the NavyInventors: Matthew J. Sanford, Randolph T. Johnson, Paul G. Wallman, Diana O. Bragunier, Stephen N. Stiles
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Publication number: 20130025748Abstract: The invention is directed to a method for preparing a pyrotechnic composition, to the use of a water-soluble cellulose ether binder, to a pyrotechnic composition, to a method for preparing a pyrotechnic charge, and to a pyrotechnic charge. The method of the invention comprises mixing the fibrous nitrocellulose in wet form with the one or more water-soluble cellulose ether binders and optionally one or more solvents, wherein the amount of organic solvent in the mixture is 10 wt. % or less based on total weight of the mixture.Type: ApplicationFiled: January 19, 2011Publication date: January 31, 2013Applicant: CLEARSPARK, LLCInventors: Martijn Zebregs, Murk Pieter Van Rooijen, Rutger Webb
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Publication number: 20090120545Abstract: The invention provides an infra-red decoy flare comprising a pyrotechnic composition which comprises an extrudable and energetic binder in an amount in the range of from 4-35 wt %, which binder comprises a nitrocellulose, an oxidator in an amount in the range of from 40-80 wt %, a pyrotechnic fuel in an amount in the range of from 15-35 wt %, and a carbon source in an amount of up to and including 10 wt %, all amounts based on total pyrotechnic composition. The invention further provides a process for preparing said infra-red decoy flare.Type: ApplicationFiled: June 7, 2006Publication date: May 14, 2009Applicant: NEDERLANDSE ORGANISATIE VOOR TOEGEPAST- NATUURWETEN-SCHAPPELIJK ONDERZOEK TNOInventors: Rutger Webb, Murk Pieter Van Rooijen
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Patent number: 5898126Abstract: The air bag gas generating composition of this invention comprises a nitrogen-containing organic compound and at least one oxidizing agent selected from the group consisting of oxo halogen acid salts and nitrates. The invention provides an air bag gas generating composition without a high shock sensitivity and with an available burning velocity and gas output characteristics and featuring a comparatively low combustion temperature.Type: GrantFiled: November 24, 1997Date of Patent: April 27, 1999Assignees: Daicel Chemical Industries, Ltd., Otsuka Kagaku Kabushiki Kaisha, Nippon Koki Co., Ltd.Inventor: Tadao Yoshida
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Patent number: 5468313Abstract: Castable high explosive compositions having a binder system containing plastisol grade nitrocellulose (PNC) and an energetic plasticizer are disclosed. The explosive composition also includes a solid high explosive ingredient, such as an explosive nitramine. Reactive metals, such as aluminum, magnesium or titanium, and oxidizers, such as ammonium perchlorate, ammonium nitrate, or ammonium dinitramide, are optionally included in the explosive compositions of the present invention. The disclosed explosive compositions have a typical detonation velocities above about 8000 m/s.Type: GrantFiled: November 29, 1994Date of Patent: November 21, 1995Assignee: Thiokol CorporationInventors: Ingvar A. Wallace, II, Paul C. Braithwaite, Jamie B. Neidert
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Patent number: 5125684Abstract: A stable extrudable non-azide crash bag propellant composition for generating high quality nitrogen gas and a low temperature process for producing the same from an extrudable mass containing an effective amount of a cellulose-based binder.Type: GrantFiled: October 15, 1991Date of Patent: June 30, 1992Assignee: Hercules IncorporatedInventor: Richard V. Cartwright
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Patent number: 5053088Abstract: Mechanical enhancement of the burning rate of solid propellants is achieved y the incorporation of limited percentages of heat-expandable beads into the solid propellant matrix. When the flame front reaches an individual bead, the bead which contains an expanding or blowing agent (e.g., pentane, 4,4'-oxybis(benzenesulfonyl hydrazide) (Celogen OT), etc., expands to several times its volume and ruptures. Bead expansion or rupture causes a disruption of the propellant's surface, and the flame can penetrate into the propellant. This penetration results in a major increase in burning rate.Type: GrantFiled: May 5, 1982Date of Patent: October 1, 1991Assignee: The United States of America as represented by the Secretary of the ArmyInventor: David C. Sayles
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Patent number: 4886560Abstract: Method and coating composition for promoting ignition of deterrent-coated smokeless propellant by applying thereto a nitrocellulose-based igniter component as an overcoat.Type: GrantFiled: December 28, 1988Date of Patent: December 12, 1989Assignee: Hercules IncorporatedInventor: Richard V. Cartwright
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Patent number: 4681643Abstract: A solid or semisolid propellant comprising grains of propellant or propellant components bonded together so as to create voids within the propellant volume, said grains bonded together with sufficient strength to substantially delay the fluidization of the propellant by the onset of Taylor unstable burning, said propellant having a rapid burn rate below that associated with Taylor unstable burn. In another embodiment, the grains are held within and the voids are filled with viscous fluid binder such as a petroleum oil, said binder functioning to hinder Taylor unsatable burning and yet permit very rapid burning within the propellant volume.Type: GrantFiled: October 3, 1983Date of Patent: July 21, 1987Inventors: Stirling A. Colgate, George E. Roos
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Patent number: 4547232Abstract: A high density emulsion blasting agent and method is provided for increasing volume energy and optimizing booster sensitivity of water-in-oil emulsion blasting agents without loss of desirable handling characteristics of invert emulsions by utilizing an effective amount of a special sensitizing formulation in total or partial substitution for gas entraining density control agents.Type: GrantFiled: September 24, 1984Date of Patent: October 15, 1985Assignee: Hercules IncorporatedInventor: Richard V. Cartwright
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Patent number: 4040879Abstract: A match head composition is prepared by mixing and kneading the component agents of the composition with glue and water, characterized in that wetted powdery cellulose nitrate containing more than 20 percent of water and having grain size of less than 840 microns is mixed in the composition in an amount not more than 10 weight percent on dry weight standard.Type: GrantFiled: February 2, 1976Date of Patent: August 9, 1977Assignee: Daicel Ltd.Inventors: Shuzo Nagatugi, Akira Miyagawa, Suguru Fukuoka
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Patent number: 3969167Abstract: High explosives and propellants made by combining a nitrated cellulose with a ketone or ketone derivative.Type: GrantFiled: December 30, 1974Date of Patent: July 13, 1976Inventor: Gerald E. Johannes
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Patent number: H285Abstract: Low (thermal) Vulnerability Ammunition or LOVA is more responsive to the rmal stimulation of the igniter compositions disclosed herein. The igniter compositions of this invention generate oxygen rich flames upon decomposition. Such igniter compositions comprise nitrocellulose, nitroglycerine, potassium perchlorate and ethyl centralite. An agent comprising one or more titanate salts and/or carbon black may optionally be included in such compositions to the extent of about 0.35% w/w. Such compositions can be extruded and utilized in strand form.Type: GrantFiled: March 5, 1986Date of Patent: June 2, 1987Assignee: The United States of America as represented by the Secretary of the ArmyInventors: David S. Downs, Carl H. Roller, Bernard Strauss