Nitrocellulose Patents (Class 149/63)
-
Patent number: 8486207Abstract: The present invention provides a chlorine-containing pyrotechnic composition which is substantially free of per-chlorate which composition comprises a nitrocellulose which is derived from a fibrous nitrocellulose starting material that has at least partially been dissolved during the process of preparing the pyrotechnic composition, and a colorant. The invention further provides a firework article comprising said pyrotechnic composition, and a method for preparing the same.Type: GrantFiled: October 9, 2009Date of Patent: July 16, 2013Assignee: Clearspark, LLCInventors: Rutger Webb, Martijn Zebregs, John Franciscus Zevenbergen, Murk Pieter Van Rooijen
-
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
-
Publication number: 20120227874Abstract: A percussion primer composition including at least one explosive, at least fuel particle having a particle size of about 1500 nm or less, at least one oxidizer, optionally at least one sensitizer, optionally at least one buffer, and to methods of preparing the same.Type: ApplicationFiled: April 26, 2012Publication date: September 13, 2012Inventors: Jack Erickson, Joel Lee Sandstrom, Gene Johnston, Neal Norris, Patrick Braun, Reed Blau, Lisa Spendlove Liu, Rachel Hendrika Newell
-
Publication number: 20120138200Abstract: Propellant compositions are provided herein for use in small arms cartridges. Such propellant compositions include a cellulose-based organic fuel, a non-azide, nitrogen-containing primary organic oxidizer and a secondary nitrate, perchlorate, chlorate of peroxide oxidizer. Preferably, such compositions are in the form of extruded shaped hollow cylindrical grains having dimensions that makes it loadable in a muzzleloader firearm or small calibre firearm cartridge case. Ignition grains are also provided for use alone or in a mixture with the propellant compositions. When used in a small calibre firearm or muzzleloader, the temperature of combustion is at a level that ensures substantially complete combustion of the fuel during firing so that the products of combustion are mostly gaseous.Type: ApplicationFiled: December 15, 2011Publication date: June 7, 2012Inventors: Mathieu Racette, Staphane Viau, Daniel Lepage
-
Patent number: 8147706Abstract: A low temperature flameless aerosol producing fire extinguishing composition containing potassium nitrate and binding fuel is characterized by using cellulose-fibrous mass as a binding fuel, with potassium nitrate at 30-70% and fibrous cellulose mass making up the remainder. A production method for the composition is further provided.Type: GrantFiled: May 10, 2010Date of Patent: April 3, 2012Assignee: ATOZ Design Labs Co., LimitedInventors: Zachary Joseph Zeliff, Liana Vladimirovna Loveless, Vladimir Victorovich Kutsel, Aleksander Ivanovich Doronichev
-
Patent number: 8133335Abstract: Propellant compositions are provided herein for use in small arms cartridges. Such propellant compositions include from about 70 to about 90% by weight of a cellulose-based organic fuel, from about 5 to about 30% by weight of a non-azide, nitrogen-containing primary organic oxidizer and from about 0.5 to about 10.0% by weight of a secondary nitrate, perchlorate, chlorate or peroxide oxidizer. Preferably, such compositions are in the form of extruded shaped hollow cylindrical grains having a length in the range of 0.030 to 0.200 inch, a diameter in the range 0.040 to 0.070 inch, and having a coaxial opening there through having a wall grain thickness in the range 0.008 to 0.016 inch. Ignition grains are also provided for use alone or in a mixture with the propellant compositions. When used in a small caliber firearm or muzzleloader, the temperature of combustion is at a level that ensures substantially complete combustion of the fuel during firing so that the products of combustion are mostly gaseous.Type: GrantFiled: February 9, 2007Date of Patent: March 13, 2012Inventors: Mathieu Racette, Stephane Vlau, Daniel Lepage
-
Publication number: 20100024932Abstract: The present invention provides a chlorine-containing pyrotechnic composition which is substantially free of per-chlorate which composition comprises a nitrocellulose which is derived from a fibrous nitrocellulose starting material that has at least partially been dissolved during the process of preparing the pyrotechnic composition, and a colorant. The invention further provides a firework article comprising said pyrotechnic composition, and a method for preparing the same.Type: ApplicationFiled: October 9, 2009Publication date: February 4, 2010Inventors: Rutger WEBB, Martijn Zebregs, John Franeiscus Zevenbergen, Murk Pieter Van Rooijen
-
Patent number: 7578895Abstract: A perchlorate-free solid pyrotechnic flash bang composition is disclosed, which comprises an oxidizer component selected from the group comprising potassium nitrate, strontium nitrate, and basic copper nitrate and combinations thereof, a metallic fuel component selected from the group comprising aluminum, magnesium, magnesium-aluminum alloys, silicon, zirconium, and combinations thereof, and a non-metallic fuel component comprising sulfur. The flash bang pyrotechnic composition may also further comprise a ballistic accelerant component, a pH stabilizer, and a free flow/anti-caking component.Type: GrantFiled: March 24, 2005Date of Patent: August 25, 2009Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Gary Chen, Mark Motyka, Jay C. Poret
-
Patent number: 6692655Abstract: In this method for making multi-base propellants, pelletized nitrocellulose is coated with an electrostatically insensitive liquid elastomer precursor or non-plasticizer while wetted in a non-solvent diluent, preferably in the absence of plasticizers. The non-solvent diluent is then substantially, if not completely, removed from the coated nitrocellulose. Then, the coated pelletized nitrocellulose is mixed with a plasticizer and optionally other ingredients and fillers, including energetic fuels such as nitroguanidine. The propellant formulation is then cast, and optionally cured with an acceptable curative, such as a diisocyanate or polyisocyanate. The resulting material may be visually (i.e., to the naked eye) homogeneous. Also, the coated nitrocellulose pellets present during processing have reduced sensitivity to electrostatic discharge.Type: GrantFiled: March 9, 2001Date of Patent: February 17, 2004Assignee: Alliant Techsystems Inc.Inventors: Laura J. Martins, Richard B. Cragun, Gary K. Lund, Michael V. Wells, Vincent E. Mancini
-
Patent number: 6620267Abstract: A non-toxic primer composition for use in ammunition is provided with a hygroscopic oxidizer which is protected from absorption of water vapor by a water-barrier coating. A preferred oxidizer is potassium nitrate and a preferred coating is nitrocellulose.Type: GrantFiled: December 19, 2000Date of Patent: September 16, 2003Assignee: SNC Technologies Inc.Inventors: Louise Guindon, Daniel Lepage, Jean-Pierre Drolet
-
Patent number: 6544363Abstract: A non-toxic heavy-metal-free priming mix and a method of forming same, designed especially for industrial shotshells and other shotshells having abnormally heavy charges of propellant in an effort to qualify for heavy duty assignments such as the need to break up cement which has set up within a cement kiln and impedes the operation of the kiln. The mix is characterized by the inclusion of a secondary highly shock-sensitive explosive, PETN, in unusually large amounts such as 13-17% by weight of the mix as well as equally large amounts of powdered aluminum, as a fuel. This combination, supported by potassium nitrate and ferric oxide as primary and secondary oxidizers, respectively, proves to be highly effective. Each of the components, namely DDNP, PETN, tetracene, glass, powdered aluminum, potassium nitrate, ferric oxide, and gum tragacanth is non-toxic and heavy-metal-free.Type: GrantFiled: October 30, 2000Date of Patent: April 8, 2003Assignee: Federal Cartridge CompanyInventor: Jack A. Erickson
-
Patent number: 6478903Abstract: A non-toxic primer mix including both bismuth sulfide and potassium nitrate as the pyrotechnic portion of the primer is disclosed. In a further embodiment, a non-toxic primer mix comprising zinc sulfide and aluminum nitrate as the pyrotechnic portion of the primer mix is disposed. Bismuth and zinc sulfide act as fuels for the oxidizers of potassium and aluminum nitrate in providing an ignition flame for the primer. The non-toxic primer mix further contains a lead-free explosive material, and additionally can include added fuels, sensitizers, explosives and binders.Type: GrantFiled: October 6, 2000Date of Patent: November 12, 2002Assignee: RA Brands, LLCInventors: Henry J. John, Jr., Carolyn Yeager, Don Pile, Tim Webb
-
Patent number: 5139588Abstract: A gas generant composition devoid of azides which yields solid combustion products which are easily filtered rendering the gases useful for inflating automobile occupant restraint bags and further providing a reduction in the amount of toxic oxides of nitrogen in the produced gases.Type: GrantFiled: April 15, 1991Date of Patent: August 18, 1992Assignee: Automotive Systems Laboratory, Inc.Inventor: Donald R. Poole
-
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
-
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
-
Patent number: 4595430Abstract: This invention relates to improved desensitized dynamites, the improvement comprising the incorporation of a desensitizing compound selected from the class of compounds known as diesters, polyesters, triesters except those esters containing benzyl rings, and dialkyl substituted amides or combinations thereof.Type: GrantFiled: May 7, 1984Date of Patent: June 17, 1986Assignee: Atlas Powder CompanyInventor: James J. Baker
-
Patent number: 4334060Abstract: A continuous process is provided for the vapor phase nitration of cellulose n a novel reactor having a gas tight housing containing a table with a perforated surface. Cellulose in porous sheet form is continuously passed into the reactor over the perforated table while continuously introducing nitric acid vapor into the housing through the perforations to provide a cushion of nitric acid gas supporting the sheet and forcing nitric acid vapor through the porous sheet. Water vapor formed in the reaction and unreacted nitric acid vapor are continuously removed from the housing, together with the nitrocellulose sheet produced. The rate at which the cellulose sheet is passed through the reactor depends on the rate at which the nitric acid is introduced and the degree of nitration desired. The cellulose can be partially nitrated by the novel process and further nitrated with nitric acid in liquid phase. The process produces a uniform nitrocellulose product suitable for use in propellants.Type: GrantFiled: October 30, 1980Date of Patent: June 8, 1982Assignee: The United States of America as represented by the Secretary of the ArmyInventor: Marcel Blais
-
Patent number: 4078954Abstract: An illuminating pyrotechnic composition comprising a stable inorganic combustion-supporting agent, a nitrated carbohydrate as a high energy binder, at least one non-volatile organic combustible compound whose combustion is exothermic overall and, optionally, a metallic constituent. Such a composition is readily ignitable and combustible and is particularly useful in block form in a signal flare or firework.Type: GrantFiled: June 25, 1976Date of Patent: March 14, 1978Assignee: Societe Nationale des Poudres et ExplosifsInventor: Claude Bernardy
-
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