105results about "Pyrophoric compositions" patented technology

The present invention relates to flares and other solid propellant devices, rockets or the like, equipped with an igniter or igniter system which is based in whole in part on an extruded igniter stick.

A wearable firestarter has a sparking material including a wearable portion and a friction element including a wearable portion. The friction element's wearable portion is releasably connected to the sparking material's wearable portion. The wearable portions may be rings or a bracelet sized to closely encompass a wearer's appendage. A portion of the wearable portions may be made of magnesium. The sparking material may be made of ferrocerium. The friction element may be made of file steel. The wearable portions may form grippable surfaces that extend away from the sparking material and the friction element.

In this process for producing a black body decoy flare, a composition which, when combusted, provides black body radiation is extruded. The compositions generally include from about 40% to about 70% metal such as magnesium or aluminum, from about 10% to about 40% polytetrafluoroethylene, and from about 8% to about 30% binder. Important to the operation of the invention is the production of carbon upon combustion of the composition. Accordingly, polyaromatic thermoplastics, such as polystyrene and dimethyl phthalate, serve as the binder.

The present invention is directed to a tracer composition for tracer bullets and other projectiles. One preferred formula of the tracer composition generally includes about 58 parts by weight of magnesium, about 38 parts by weight of polytetraflouroethylene, about 4 parts by weight of acrylic rubber, and a burn rate stabilizer such as about 1.5 parts by weight of carbon black or graphite. Tracer bullets including the tracer composition of the invention tend to exhibit a projectile path that is almost unnoticeable to the naked eye but quite visible through the use of equipment detecting energy in the near infrared range.

The present invention includes a salt compound having the chemical formula:

• • having a tricyclic structure with the third ring having either six or seven atoms.

An energetic material composition includes a reducing material and an oxide of phosphorus. The reducing material includes a reducing metal and, in an optional hydride form, auto disperses products of the reaction by the formation of a gaseous product. The composition can be included in a cavity of a warhead. A method of neutralizing a targeted species and a method of reducing structural integrity of civil engineering structures by reacting the composition are also provided.

Compositions are provided which, when burned, produce significant levels of infrared radiation, but only limited levels of visible radiation. The basic components of the compositions include a binder, an oxidizer, and a fuel, where the binder also acts the fuel. Preferred oxidizers include those compounds which produce large quantities of infrared radiation when the flare composition is burned. Such oxidizers include potassium nitrate, cesium nitrate, rubidium nitrate, and combinations of these compounds. Selection of the binder is important in order to provide the composition with the desirable characteristics identified above. The binder of the present invention does not produce significant soot. At the same time, the binder serves to form a composition which is processible, avoids chunking, and is compatible with the oxidizers used. It has been found that polymer binders which include relatively short carbon chains (1-6 continuous carbon atoms) are preferred. Examples of such polymers include polyesters, polyethers, polyamides, and polyamines.

An improved method for the production of pyrophoric materials which does not employ hot NaOH and produces pyrophoric materials on various types of ceramic, metal, nanomaterial substrates. The method impregnates the substrate materials with pyrophoric iron or other materials resulting in materials that are “tunable” with respect to its pyrophoric output as determined by its temperature, rise time sustenance etc through selective variation of particle size, morphology, and diluents or reactive materials.

Non-lethal payloads including at least one of boron and silicon, at least one fuel, and at least one oxidizer. The non-lethal payload may be a single-component or dual-component payload. Methods of producing the non-lethal payloads are also disclosed.

An expendable infra-red radiating means having a rupturable container 1 housing a plurality of decoy plates (11) and an ignition means (17) for igniting the decoy plates (11). Each of the decoy plates (11) comprises a composition of a metal and an oxidant capable of an exothermic combustion reaction upon ignition which produces negligible quantities of radiation in the visible or ultra-violet regions and which results, after the combustion reaction is completed, in the decoy plates (11) containing hot metal emitting infra-red radiation.

Flares with consumable weights connected to a forward end of the grain of the flare are disclosed. Also disclosed are consumable weight components for flares. The consumable weight components include a metal material within a matrix. Also disclosed are methods for fabricating a flare and methods for using a flare. Use of the consumable weights in the flares may reduce the amount of debris falling to ground.

A method for preparing a pyrotechnic composition which comprises preparing a composition in a gel form using nitrocellulose and a nitro compound other than nitrocellulose, adding an oxidizing agent, a combustible material and a color rendering agent to the composition, followed by mixing, forming the resultant mixture into a desired shape, and then drying; and a pyrotechnic composition obtainable by using the method. This method can be used for simplifying a production process while maintaining the effect of a star and a lance used in a pyrotechnic composition, particularly in a firework composition.

The invention provides a chlorine-containing pyrotechnic composition which comprises a binder, an oxidator, a pyrotechnic fuel, and a colourant comprising a metal salt of 5-aminotetrazole. The invention further relates to a firework article comprising such a pyrotechnic composition. In addition, the invention provides a method for preparing said colourant.

An incendiary composition (14) for a fin-stabilized kinetic energy projectile (1), which can be arranged in the tail region of the projectile (1) and, upon impact with a target (13), penetrates the target (13) as a separate unit behind the penetrator (2) of the kinetic energy projectile (1). To reach the objective of a high destructive effect caused by the incendiary composition (14) within a target (13), despite a small volume and a low mass, and to ensure that the incendiary composition is ignited securely by the shock waves generated upon impact, according to the invention, a titanium sponge is used as the incendiary composition (14), with an epoxide resin or a polyester resin used as a binder.

The invention relates to a subprojectile (1) comprising a body, which is provided with a borehole (5) and consists of hard metal or heavy metal, an energy component (3) with or without a firing means (4) being incorporated into the borehole (5). The energy component (3) with or without a pressure-sensitive firing means (4) is fired or activated by air friction, by an ignition in the carrier bullet together with a firing charge, or at the latest when the target is hit.

Flares include grain assemblies comprising a combustible grain and a reactive foil positioned at least proximate to the grain and configured to ignite combustion of the grain upon ignition of the reactive foil. The reactive foil may include alternating layers of reactive materials. Methods of fabricating flares include at least partially covering an exterior surface of a combustible grain with a reactive foil to form a grain assembly, and inserting the grain assembly at least partially into a casing. The reactive foil may include alternating layers of reactive materials that are configured to react with one another in an exothermic chemical reaction upon ignition. Furthermore, methods of igniting a flare grain include initiating an exothermic chemical reaction between alternating layers of reactive materials in a reactive foil located proximate to the flare grain.

Disclosed herein are pyrophoric composite materials comprising nanoporous pyrophoric alpha iron nanoparticles dispersed in a ceramic matrix for use as aerial decoys. The composite material is prepared using tape casting methods to produce a thin film. The iron precursor in the film is then activated by reduction under a hydrogen atmosphere. The composite nanoporous pyrophoric alpha iron nanoparticles and ceramic material is an improvement over current pyrophoric decoys as it eliminates the use of harmful chemicals and the need for a substrate to support the composite.

The invention discloses a chemical auxiliary ignition agent and ignition method for a low-temperature heavy-oil reservoir. The chemical auxiliary ignition agent is prepared from, by mass, 50-65% of areducing agent, 10-15% of an oxidant, 20-35% of a catalyst and 5-15% of other components. A chemical auxiliary ignition technique is adopted for in-situ oil combustion exploitation of the low-temperature heavy-oil reservoir, and by adding of the reducing agent, combustible components can be increased while initial ignition energy can be provided; by adding of the oxidant, combustion can be intensified, and redox reaction is accelerated; by adding of the catalyst, oxidation reaction activation energy can be reduced, the oxygen consumption rate is increased while fuel deposition is changed, coking zone reduction is realized, and by joint action, conversion from low-temperature oxidation to high-temperature oxidation is accelerated, and ignition is realized.

A novel non-toxic IR tracer composition is provided herein which, when incorporated into an IR tracer projectile which is then fired, generates a dim visibility IR trace. Such IR tracer composition is a non-toxic, metallic-boron-containing, IR tracer composition comprising: from about 20 to about 30% by weight, or from about 45 to about 60% by weight, of at least one of potassium chlorate or sodium nitrate; from about 5 to about 16% by weight of a metallic fuel which consists of metallic boron; optionally, from about 15 to about 25% by weight, or from about 40 to about 50% by weight, of a non-metallic fuel which consists of sodium salicylate; from about 5 to about 20% by weight of a retardant which consists either of iron carbonate, or magnesium carbonate or calcium carbonate; from about 5 to about 15% by weight of a first binder which consists of calcium resinate; and up to about 7.5% by weight of a second synthetic resin binder which consists either of a copolymer of hexafluoropropylene and vinylidene fluoride or cellulose acetate butyrate, wherein the total percentage of such ingredients add up to 100%. A novel IR tracer projectile containing such IR tracer composition for generating a dim visibility IR trace is also provided.

Surface-modified metal fuels, which improve the stability in storage of pyrotechnics and methods for manufacturing such fuels, are provided. Improved storage stability is conferred either by alloying the precursor metal prior to the powder production process, or by forming an enhanced stability coating on the surface of the metal powders during the powder production process.

An active body is provided that includes at least one active mass block made of monobasic or polybasic high-energy materials such as a nitrocellulose mixture, for example, comprising approximately 60 percent nitroglycerin and 40 percent diethylene glycol dinitrate, which is provided with structures both on a surface and on an interior. In addition, the inner structures can be filled with an active mass substance. The ignition is triggered by a pyrotechnical primer composition, which initiates the active body, preferably from the inside.