With Nonexplosive Or Nonthermic Component Patents (Class 149/100)
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Patent number: 4234364Abstract: A crosslinked binder for crosslinked double base propellant is provided. The binder is prepared from nitrocellulose having a nitrogen content of 11 to 13.4% N and an intrinsic viscosity of 0.55 dl./gram to 2.0 dl./gram, a polymeric diol having a hydroxyl functionality of 1.9 to 2.1 and a polyfunctional isocyanate having an NCO functionality of at least three. The propellant prepared from the binder exhibits improved mechanical properties without detriment to ballistic performance.Type: GrantFiled: May 30, 1978Date of Patent: November 18, 1980Assignee: Hercules IncorporatedInventor: Anderson E. Robinson, Jr.
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Patent number: 4202713Abstract: A unit charge of propellant powder, particularly suitable for ammunition for small and medium caliber arms, consisting of grains of nitrocellulose powder agglomerated together by means of a gelatinizing plasticizer for nitrocellulose, which plasticizer is liquid at a temperature of up to 80.degree. C. and is present in an amount not exceeding 7% based on the weight of the nitrocellulose.The charge has virtually the same potential energy as loose nitrocellulose powder and it also fragments and burns instantly, like a loose powder.Type: GrantFiled: December 14, 1977Date of Patent: May 13, 1980Assignee: Societe Nationale des Poudres et ExplosifsInventors: Philippe R. Ragon, Gerard Van Vooren
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Patent number: 4126497Abstract: A double base propellant having plasticizer and ballistic modifiers unifoy dispersed therein is formed by using high speed, high shear techniques. The method of uniformly incorporating plasticizers and ballistic modifiers in a solventless process for preparing nitrocellulose is accomplished by forming a slurry of nitrocellulose under high shear, high speed mixing, adding the plasticizers and modifiers thereto and recovering the propellant.Type: GrantFiled: December 13, 1973Date of Patent: November 21, 1978Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig E. Johnson, Paul F. Dendor
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Patent number: 4106960Abstract: A propellant charge composition comprising individual powder particles of a nitrocellulose propellant coated with a coating of an acrylic resin and a process for its preparation. Also disclosed is a propellant charge composition of the type described containing a second propellant.Type: GrantFiled: January 27, 1977Date of Patent: August 15, 1978Assignee: Dynamit Nobel AktiengesellschaftInventors: Heinrich Brachert, Johannes Eich
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Patent number: 4097315Abstract: A casting powder granule containing a magnetic material is provided. The granule can be oriented in a desired direction by an applied magnetic field. Cast propellant charges having augmented burning rates can be prepared from magnetically susceptible casting powder granules containing metallic staple which are oriented by a magnetic field prior to addition of casting solvent.Type: GrantFiled: March 21, 1968Date of Patent: June 27, 1978Assignee: Hercules IncorporatedInventors: William H. Gardner, Donald H. Graham, George M. Williams
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Patent number: 4082584Abstract: A ballistic modifier produced as the product of the pyrolysis of heavy me oxides and various ureas.Type: GrantFiled: February 11, 1971Date of Patent: April 4, 1978Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Daniel R. Satriana, Arthur J. Bracuti
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Patent number: 4082583Abstract: Solventless double base propellants plasticized by metriol trinitrate thrh the addition of triethylene glycol dinitrate in a ratio of at least 1:14 triethylene glycol dinitrate to metriol trinitrate.Type: GrantFiled: January 14, 1974Date of Patent: April 4, 1978Assignee: The United States of America as represented by the Secretary of the NavyInventor: Paul R. Mosher
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Patent number: 4072546Abstract: Solid propellant compositions having graphite fibers dispersed throughout the propellant are provided. The graphite fibers augment the burning rate of the solid propellant.Type: GrantFiled: November 5, 1975Date of Patent: February 7, 1978Assignees: Hercules Incorporated, Hercules CorporationInventor: Richard Winer
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Patent number: 4061511Abstract: The use of an aluminum silicate molecular sieve as a stabilizer in propelts that give off gas during the aging process. An aluminum silicate molecular sieve is added to propellants that give off gases such as N.sub.2, CO.sub.2, CO, F.sub.2 and NO.sub.x during the aging process. The aluminum silicate molecular sieve is selected to have a pore size of less than about 10 angstroms. This brings about absorption of these undesirable gases during the aging process and thereby prevents degradation of the propellant.Type: GrantFiled: August 2, 1976Date of Patent: December 6, 1977Assignee: The United States of America as represented by the Secretary of the NavyInventor: Robert J. Baczuk
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Patent number: 4051207Abstract: A process for producing propellant charge powders from solvent-containing mixtures such as nitroguanidine powders containing nitrocellulose and/ or nitrocellulose and diglycol dinitrate or nitroglycerin and nitroguanidine and additives wherein an alcohol-containing mixture or optionally a water-containing mixture of said propellant charge powders is premixed with additional components of the propellant powder, the mixture is first dried, if necessary, and the solvent is incorporated therein and the solvent-containing premix is homogenized and preplasticized in a kneading device or the water-containing premix is homogenized and preplasticized in the kneading device and then the resultant mixture is dewatered by drying and then combined with a solvent; then the solvent-containing mixture is plasticized in an extruder and converted thereby into granular form and the resulting granular material is extruded into a final product form in a screw-type extruder. Subsequently, the solvent is evaporated therefrom.Type: GrantFiled: December 29, 1975Date of Patent: September 27, 1977Assignee: Dynamit Nobel AktiengesellschaftInventors: Heinrich Brachert, Joachim Kleiss
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Patent number: 4045261Abstract: A dual stabilization system for urethane - crosslinked double base propelt. The stabilization system includes N-Methyl-p-Nitroaniline and Aluminum Silicate molecular sieve. The two stabilizers function in a complementary fashion wherein the N-Methyl-p-Nitroaniline reacts with and makes harmless the nitrogen (III) oxide during the propellant aging process. The Aluminum Silicate molecular sieve is selected to have a pore size of more than about 10 angstroms and reacts with and makes harmless the nitrogen (V) oxides, primarily nitric acid, during the propellant aging process.Type: GrantFiled: August 2, 1976Date of Patent: August 30, 1977Assignee: The United States of America as represented by the Secretary of the NavyInventor: Robert J. Baczuk
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Patent number: 4039640Abstract: A mouldable thermoplastic composition comprises (i) polyvinyl nitrate, (ii) nitrocellulose and/or polyvinyl acetate and (iii) 2-nitro-diphenylamine and may be used to form combustible articles such as cartridge cases. Preferably, the composition comprises from 30 to 90% by weight of polyvinyl nitrate based on the total weight of components (i) and (ii). The composition may comprise up to about 30% by weight, based on the weight of components (i) and (ii), of at least one additive selected from cellulose acetate, dinitrotoluene, phthalates, non-volatile esters, heterocyclic ketones, ureas and ABS copolymers.The combustible articles may be formed by compression moulding or injection moulding. Preferably the mouldable composition is formed into granules using the "with solvent" technique for making single base propellants, and the granules are mixed with a porous powder comprising nitrocellulose prior to being moulded to form the combustible article.Type: GrantFiled: August 5, 1976Date of Patent: August 2, 1977Assignee: Societe Nationale des Poudres et ExplosifsInventor: Louis J. Leneveu
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Patent number: 4031172Abstract: An improved process for producing colloidal nitrocellulose having a high vimetric loading density by a shock gel type process is provided. Process improvements result in part from the use of 13.35%N as the source of nitrocellulose and from the use of diethylene glycol monomethyl ether as the shock gel solvent. Gravimetric loading densities of at least 0.95 gm./ml. are achieved through this process.Type: GrantFiled: September 28, 1976Date of Patent: June 21, 1977Assignee: The United States of America as represented by the Secretary of the ArmyInventor: Edward H. Zeigler
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Patent number: 4025370Abstract: The addition of azobisformamide to a double base propellant in order to (1) hift the plateau pressure-burning rate relationship of a double base propellant modified by any of the commonly used copper and lead organo salts and (2) increase the volume and nitrogen content of the exhaust gas of the propellant.Type: GrantFiled: April 4, 1974Date of Patent: May 24, 1977Assignee: The United States of America as represented by the Secretary of the NavyInventors: Elmer R. Csanady, Paul R. Mosher, Albert T. Camp
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Patent number: 4023996Abstract: A mouldable thermoplastic composition comprises (i) polyvinyl nitrate, (ii) nitrocellulose and/or polyvinyl acetate and (iii) 2-nitro-diphenylamine and may be used to form combustible articles such as cartridge cases. Preferably, the composition comprises from 30 to 90% by weight of polyvinyl nitrate based on the total weight of components (i) and (ii). The composition may comprise up to about 30% by weight, based on the weight of components (i) and (ii), of at least one additive selected from cellulose acetate, dinitrotoluene, phthalates, non-volatile esters, heterocyclic ketones, ureas and ABS copolymers.The combustible articles may be formed by compression moulding or injection moulding. Preferably the mouldable composition is formed into granules using the "with solvent" technique for making single base propellants, and the granules are mixed with a porous powder comprising nitrocellulose prior to being moulded to form the combustible article.Type: GrantFiled: August 20, 1976Date of Patent: May 17, 1977Assignee: Societe Nationale des Poudres et ExplosifsInventor: Louis J. Leneveu
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Patent number: 4018637Abstract: A nitrocellulose-containing lacquer for producing a smokeless powder propellant, which lacquer includes nitrocellulose, a solvent for the nitrocellulose, water, and a surfactant for preventing the water from forming discrete globules in the lacquer.Type: GrantFiled: February 20, 1975Date of Patent: April 19, 1977Assignee: Olin CorporationInventors: Earl J. Kimmel, Charles Earnest Silk, deceased
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Patent number: 4000025Abstract: Ballistic modifiers of up to one micron in size are slurried and mixed with high impulse propellant slurry in order to produce a high impulse propellant having a plateau or mesa burning characteristic.Type: GrantFiled: May 28, 1974Date of Patent: December 28, 1976Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig E. Johnson, Larry D. Henderson
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Patent number: 3983818Abstract: Incendiary or flame projectile for use with conventional igniter-tracer sems and capable of being propelled over distances up to about 600 yards to ignite hard-to-ignite combustible materials such as wood or canvas, the projectile being operable and efficient at atmospheric pressures and containing a flame-producing composition similar to gas generator propellants of double-base or ammonium perchlorate formulations.Type: GrantFiled: March 31, 1975Date of Patent: October 5, 1976Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Thomas Q. Ciccone, Thomas McNally, William E. Perkins
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Patent number: 3979236Abstract: A means for reducing or eliminating the erosive burning which takes place ring the burning phase of solid propelled rocket motors which have a large length-to-diameter ratio and/or slow-burning propellants is disclosed. The means comprises incorporating into the solid propellant, in limited percentages (0.1-1.0%), a silicate selected from talc, kaolinite, kaolin, muscovite mica, and feldspar. The silicate additive is effective for composite or double-base solid propellant compositions. The solid composite propellant compositions can vary widely in formulation ingredients to include numerous ballistic modifiers; however, the general formulation for a composite propellant contains in addition to the silicate, a high solids loading of an inorganic oxidizer such as ammonium perchlorate, a polybutadiene binder with curatives and crosslinking agents, and optional metal fuel, preferably aluminum. The polybutadiene can have carboxyl- or hydroxyl-terminal groups.Type: GrantFiled: December 17, 1975Date of Patent: September 7, 1976Assignee: The United States of America as represented by the Secretary of the ArmyInventor: David C. Sayles
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Patent number: 3979486Abstract: In the preparation of double-base propellants where nitrocellulose-based granules are gelatinized by an explosive oil, the ballistic properties of the propellant are controlled by adjusting the content of nitrogen of the nitrocellulose of the granules, said content ranging from 12.6 to 14 % approximately.Type: GrantFiled: July 27, 1973Date of Patent: September 7, 1976Assignee: Societe Nationale des Poudres et ExplosifsInventors: Michel A. Herchin, Jacques H. Blandin
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Patent number: 3971681Abstract: 1. A solid rocket propellant composition which consists essentially of from about:1. 30-60 weight per cent of a double base propellant2. 5-30 weight per cent of a finely divided metal fuel3. 5-30 weight per cent of an inorganic oxidizer4. 10-30 weight per cent of triaminoguanidinium azide.Type: GrantFiled: January 24, 1962Date of Patent: July 27, 1976Assignee: The Dow Chemical CompanyInventors: William A. Rains, Robert D. Fox, James P. Flynn
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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: 3963545Abstract: An energetic double base propellant composition consisting essentially of trocellulose and nitroglycerin as the major ingredients with about 48-52 weight percent of the propellant composition being nitrocellulose and about 40-44 weight percent of the propellant composition being nitroglycerin, and the minor ingredients comprised of about 2-4 weight percent di-n-propyladipate, about 2-2.5 weight percent 2-nitrodiphenylamine, about 0.1-0.2 weight percent candelilla wax, and about 1.0-1.3 weight percent aluminum is disclosed.Type: GrantFiled: November 8, 1974Date of Patent: June 15, 1976Assignee: The United States of America as represented by the Secretary of the ArmyInventors: William E. Thomas, Thomas E. Martin
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Patent number: 3948697Abstract: Propellant inhibitors are provided for cellulose-containing particulate solid propellants, and particularly for nitrocellulose-containing gun propellants, in which the inhibitor is the reaction product of a polyfunctional isocyanate such as polymethylene polyphenyl isocyanate and a polyol such as polyethylene glycol.Type: GrantFiled: July 11, 1973Date of Patent: April 6, 1976Assignee: Rockwell International CorporationInventors: Joseph E. Flanagan, George A. Lo, Milton B. Frankel, Vernon E. Haury