Abstract: A process for the adsorption of nitroglycerine from aqueous streams using nitrocellulose as the adsorbent.

Abstract: The invention relates to a novel process for the production of casting powder with high ntirocellulose content, and casting multiple-base rocket propellant including nitroglycerin formulated from such casting powder.

Abstract: Explosive or propellant compositions containing at least one nitrocellulose contain an additive including at least one substituted tetrazine in amounts effective to increase the burning rate of the composition. A preferred additive is 3,6-dihydrazino-s-tetrazine.

Abstract: The invention relates to the field of protecting the occupants of a motor vehicle by an inflatable airbag. The invention relates to a process consisting in inflating an airbag (1) by a pyrotechnic generator (2) containing a double-composition charge (9) formed around a main charge having a linear burning rate V1 and at least part of the ignition faces of which are covered with a skin of moderate pyrotechnic composition having a linear burning rate V2 satisfying the relationship: 0.05 V1≦V2≦0.5 V1. The invention thus makes it possible to inflate the airbag gradually during the first milliseconds of deployment of the latter.

Abstract: This invention relates to liquid propellant compositions containing an enetic material of organic nitrate esters. The organic nitrate esters of the present invention are complexed with a nitrate ester plasticizer, bismuth subsalicylate, and stabilizer to form liquid compositions with an appropriate energy, stability, and sensitivity that is useful as a propellant.

Abstract: A combustion inhibiting composition for use in conjunction with a solid, gas-generating charge, the composition comprising an organic polymeric material containing an oxygen-containing organic filler compatible with said polymeric material, the oxygen to carbon atom ratio of the composition being at least 1:3.

Abstract: Double base propellants having a mixture of bismuth and copper salts of hydroxy-substituted benzoic acids added as burning rate (ballistic) modifiers.

Abstract: 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.

Abstract: A unitary propellant charge module for use in separate ammunition comprises a combustible container having a generally hollow cylindrical shape, a generally cylindrical charge body of interconnected compacted spheroidal propellant grains disposed within the container, each of the grains having an uncompacted propellant grain diameter of at least 100 mils, and at least one generally tubular center core igniter body of interconnected compacted spheroidal propellant grains having an unrolled grain size between about 20 to less than 100 mils in diameter. The igniter body is disposed within a central bore extending along the longitudinal axis of the charge body.

Abstract: An energetic plasticizer for double base propellants comprising (1) a mixe of sorbitol tetra-,penta-, and hexa-nitrate (MSN) and (2) a polyolpolynitrate selected from the group consisting of diethyleneglycoldinitrate (DEGDN), triethyleneglycoldinitrate (TEGDN), nitroglycerin (NG) and mixtures thereof. Also included are compound formulations for double base, modified double base, and composite modified double base propellants incorporating the above energetic plasticizer.

Abstract: Use of 5-oxo-3-nitro-1,2,4-triazole in gunpowder and propellant compositions are disclosed. Such compositions include triple base gunpowders further containing nitrocellulose and a liquid nitric ester such as nitroglycerine. Lowered flame temperatures of the gunpowder and reduced firearm barrel erosion is achieved thereby. The solid propellants include gas-generating compound propellants, less hygroscopic than a propellant contaning ammonium nitrate.

Abstract: The invention relates to a process for the manufacture of a double-base propellent composition with low flame-glare emission, and a propellent composition thus obtained.The process of the invention consists in casting a nitrocellulose-based moulding powder with a nitroglycerine-based casting solvent. According to the invention, the moulding powder consists of a mixture of two powders, one of which contains the antiglare agents, and the weight ratio of the powder containing the antiglare agents to the other powder is between 15/85 and 50/50. The invention permits an antiglare agent to be added to a propellent composition without affecting the ballistic properties of the composition, while strengthening the antiglare effect of this agent.The invention is applicable particularly in the field of solid-fuel propulsion.

Abstract: 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.

Abstract: The invention relates to a combustion inhibitor composition intended to cover partly the surface of blocks of double-base propellant. The inhibitor composition of the invention includes an aliphatic polyurethane obtained by the reaction of at least one polyisocyanate with a mixture of at least one polyetherpolyol containing at least three hydroxy groups per molecule and at least one polymer containing two hydroxy groups per molecule. This difunctional polymer is chosen from lactone polymers, such as poly-.epsilon.-caprolactone and polytetrahydrofuran. The inhibitor composition may also contain gasifiable fillers and an aliphatic plasticizer. The composition has good discreteness properties, while retaining excellent mechanical properties. The present invention has particular application in the field of solid weapon propulsion.

Abstract: A primer charge containing an oxidizing agent and an initiating explosive. The charge contains as the oxidant zinc peroxide and as the initiating explosive diazodinitrophenol and/or a strontium salt of mono- and/or dinitrodihydroxydiazobenzene. In correspondence with the content of the strontium salt employed, the charge can also be utilized with low tamping; alternatively, such tamping can be selected at will. The charge is furthermore distinguished by lead-free and barium-free combustion products so that the charge does not exhibit the properties which make the heretofore known primer charges deleterious to the health of humans.

Abstract: A liquid-type low detonation-velocity explosive composition having reduced shock energy with unhindered bubble energy, and a method for minimizing damage from explosive well stimulation procedure by use of such composition.

Abstract: A method of minimizing deep hole pressure effects on ammonium nitrate-containing blasting agents while optimizing booster sensitivity, detonation rate and detonation energy of such agents, by replacing density control component(s) with a sensitizer formulation comprising particulate aluminum and particulate smokeless powder; and a corresponding detonatable high density emulsion blasting agent utilizing such sensitizing formulation.

Abstract: 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.

Abstract: Single- or multi-base propellants are produced in a solvent process from ir starting components, of which at least one is moistened with alcohol, using a twin-shaft screw extruder, that has an inlet zone run at a raised temperature, then nextly a mixing and kneading zone and lastly an outlet zone. The temperature in the kneading and mixing zone and in the outlet zones is kept at a value that is higher than in the inlet zone. Furthermore there is a temperature drop towards the outlet zone.

Abstract: A double base propellant composition having well-platonized ballistics at low burning rates consists of nitroglycerine (NG), nitrocellulose (NC) at least one lead compound and at least one copper (II) salt of an aliphatic dicarboxylic acid. The copper salt preferably comprises copper succinate, and the lead compound may include any of those known as ballistic modifiers in the propellants art. A preferred composition, having a platonized burning rate of 2.3 mm s.sup.-1 at a chamber pressure of 2-3 MPa, comprises by weight 35.1% NC (12.6% nitrogen), 41.6% NG, 8.3% triacetin, 10.7% sucrose octa-acetate, 0.3% 2-nitrodiphenylamine, 1.2% p-nitromethylaniline, 1.0% copper (II) succinate and 1.8% lead acetophthalate.

Abstract: The inclusion in a double base propellant of a ballistic modifier selected rom the class consisting of copper, lead, tin, and bismuth chelates of a dihydroxybenzophenone or alkoxyhydroxyphenzophenone.

Abstract: A gas generating propellant charge which is made by piling explosive powder sheets having a plurality of projections on at least one surface thereof so as to make contact them with each other is excellent in firing characteristics, and the explosive powders in the gas generating propellant charge can be burnt in a short time, thereby generating a large amount of gas.

Abstract: A method for strengthening a propellant charge by incorporating a support ructure in the propellant charge comprises slowly traversing a flexible perforated material through a propellant lacquer until the desired loading is obtained. Reinforcement by this technique makes possible the use of a double base propellant in high-thrust, short-burning applications.

Abstract: Small charges of high energy double base propellants are prepared by solventless extrusion of propellant billets prepared by a slurry type process.

Abstract: A blasting agent comprising ammonium nitrate, fuel, a nitroalkane and bentonite as a thickening agent.

Abstract: A new class of ballistic modifiers and the synthesis thereof is disclosed rein and are used in propellants either individually or as admixtures in percentages of approximately 0.5 to 6 weight percent to impart mesa or plateau burning rate characteristics over a wide pressure range and reduce the temperature sensitivity of the propellants in relation to burning rates. The modifiers are chelate type compounds comprised of lead and/or copper, and various predetermined molar ratios of compounds such as salicylic acid and beta-resorcylic acid.

Abstract: A double-base granular propellant consisting mainly of nitroglycerine and nitrocellulose, said nitrocellulose being formed into a three-dimensional structure by the crosslinking reaction of a polyfunctional isocyanate, is disclosed. The propellant is superior to conventional double-base granular propellant in the shooting performance, and can be obtained by a simple solvent-granulation process.

Abstract: Process for removal of residual "processing" solvent from propellant casting powder particles, following their manufacture, which comprises "liquid drying" the particles by contacting them with an organic liquid miscible with the processing solvent but exhibiting substantially no solvent action for the powder particle ingredients with substantially no penetration of the particles. Normally liquid hydrocarbons are exemplary liquid drying solvents of which n-heptane and n-hexane are now preferred.In preferred practice the liquid drying solvent is maintained in substantially complete wetting relationship with the particle surfaces until emplacement of the particles for casting. This eliminates safety hazards involved in conventional heat drying of the green powder and subsequent handling of the resulting dry material.

Abstract: A ballistic modifier produced as the product of the pyrolysis of heavy me oxides and various ureas.

Abstract: A process is provided for preparing double base propellant by slurry casting in which flake casting powder is employed as the source of nitrocellulose. High burning rate propellants can be prepared by this process employing flake casting powder containing ballistic modifiers.

Abstract: 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.

Abstract: 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.

Abstract: Ballistic modification is accomplished by incorporation oxides of lead and in in nitramine double-base propellants.

Abstract: An organo-metallic ballistic modifier produced as an evaporation residue by the interaction of two or more organo-metallic salts in an aqueous solution of water or alcohol at an elevated temperature (180.degree. F - 220.degree. F). The modifier allows the use of a solvent or solvent/solventless process in the production of double base propellants exhibiting a mesa burning rate.

Abstract: 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.

Abstract: 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.

Abstract: 1. A process for the production of a cast propellent which consists in blending a colloided nitrocellulose smokeless powder composition containing a platonisation agent selected from the group consisting of lead stearate, lead citrate, lead salicylate, lead 2:4 dihydroxy-benzoate, lead sulphite, lead oxide, copper oxalate, copper salicylate, copper 2:4 dihydroxy-benzoate and cupric oxide, with colloided nitrocellulose smokeless powder composition containing a secondary flash suppressing potassium salt in the proportion by weight of at least three parts of the first mentioned nitrocellulose composition, adding to the blended nitrocellulose compositions a casting liquid consisting essentially of nitroglycerine in an amount sufficient to fill the interstices in the blended nitrocellulose compositions, and heating the resulting mixture.

Abstract: Composite-modified double base propellants containing aluminum as a metal el having ferric fluoride added as a combustion catalyst, a thermal stabilizer and an aid in reducing exhaust plume interference with a radar guidance system.

Abstract: 7. A process for preparing a solid propellant composition having a plateau-burning rate comprising the steps ofA. mixing at room temperature the following ingredients until a viscous binder results:Ingredients Percent by weight ______________________________________ High energy plasticizer selected from 15 to 85 the group consisting of pentaerythritol trinitrate, diethylene glycol dinitrate, trimethylolethane trinitrate and mixtures thereof Ingredients Percent by weight ______________________________________ Plastisol nitrocellulose 10 to 50 Ethyl centralite .4 to 5; ______________________________________B. blending into said binder, until a homogeneous pourable mixture result a cured propellant composition which has been milled to an average particle size of about 30 mesh, said composition consisting essentially of the following ingredientsIngredients Percent by weight ______________________________________ Nitrocellulose 13.5 to 27.5 Nitroglycerin 10.5 to 22.5 Additives .

Abstract: 1. A composition of matter comprised of an epoxy resin, a copolymer of butadiene and acrylic acid, a curing agent, and between about 2.5 and about 30 percent by weight of an inorganic metal salt selected from the group consisting of metal chromates, metal bichromates, metal phosphates, and mixtures thereof.