171results about "Alkali metal salt explosive compositions" patented technology

High nitrogen gas generant compositions, useful for inflating passenger restraint gas inflator bags, comprise a nitrogen rich coordination compound selected from coordination complexes comprised of anionic nitro and nitrito ligands coordinated with a transitional metal template, and nonmetallic or nonmetallic / metallic cations. The gas generant compositions generate relatively more gas and less solids, and are safer than known gas generant compositions. Certain gas generant compositions ignite at lower autoignition temperatures thereby facilitating the use of an aluminum or light weight metal pressure vessel. Other gas generants self-deflagrate eliminating the need for other constituents in the composition. Novel methods for the synthesis of nonmetal derivative coordination complexes, guanidine and hydrazine for example, are also presented.

The present invention is directed to pyrotechnic aerosol fire suppression compositions that burn rapidly, but coolly. The rapid burning of the compositions of the present invention produces a voluminous flame-suppressive aerosol that is useful in suppressing and / or extinguishing both small and large fires. The compositions of the invention contain at least one oxidizer and a fuel component comprising at least one organic acid salt, which combination produces a rapid burning composition that burns at low temperatures with little or no flame.

An explosive material composition containing, as an active ingredient, particles of a water-soluble reactive ingredient having an uniform particle size. Each particle is coated with an oil ingredient and / or a thickener. The coated particles form an agglomerate.

The present invention relates to a non-toxic primer powder composition for small caliber ammunition characterized by comprising potassium nitrate coated with shellac as an oxidizer, and particularly characterized by comprising 25-40 wt % of an initiating explosive, 10-30 wt % of nitrate ester as a fuel, 32-40 wt % of a shellac-coated potassium nitrate (KNO3) as an oxidizer, 5-10 wt % of tetracene as a first sensitizer, 3-9 wt % of a borosilicate powder as a second sensitizer and 0.1-0.2 wt % of a chemical binder.

A safe environment-friendly novel pyrotechnic composition is used as a powdery colorful flower-forming spray composition, and comprises the compositions in parts by weight: 20-50 parts of a high-energy oxidizing agent, 30-60 parts of nitrocellulose, 1-15 parts of a colouring agent, 1-15 parts of a combustible effect agent, 1-10 parts of an adhesive, and 1-10 parts of a stabilizing agent. A preparation technology for the novel pyrotechnic composition is simple, the pyrotechnic composition prepared by employing the above formula is relatively low in friction sensitivity and impact sensitivity, far higher in chemical stability and safety than those of other pyrotechnic compositions, slightly smoky and environment-friendly after being combusted, and is widely applicable to various pyrotechnic composition products.

A low density slurry bridge mix for use in an inflatable restraint system is provided. The low density slurry bridge mix includes zirconium metal, a thermal conductivity enhancer such as aluminum metal, potassium perchlorate oxidant, and a binder material and has a dry density of about 45 to about 65 percent of theoretical density. The low density slurry bridge mix may be used in an initiator including an unground header attached to a raised bridgewire wherein the low density slurry bridge mix surrounds and adheres to the bridgewire.

A nitrocellulose-free, gas-generating composition for use in vehicle occupant restraint systems, in particular in a belt tensioner gas generator, substantially consists of at least one nitrogen-containing organic fuel in a proportion of 55 to 70% by weight, an inorganic oxidator in a proportion of 30 to 45% by weight, at least one combustion moderator in a proportion of up to 10% by weight and up to 5% by weight conventional adjuvants and additives, each in relation to the overall weight of the composition. The composition has a pressure exponent of less than 0.35 and a combustion rate at 200 bar of at least 40 mm / s.

A gas generator including a plug (24) having a header part (45) and two or more electrode pins (22, 23), a thin-film bridge (25) having electrode pads (41, 42), and a squib (10) in which upon supply of electric current to the thin-film bridge (25) via the electrode pins (22, 23), the thin-film bridge (25) is activated to ignite ignition materials (26, 27), wherein the thin-film bridge (25) is arranged into a hollow (32) prepared at the plug (24) in such a manner that the thin-film bridge (25) is kept approximately on a level with the head (35) of the electrode pins (22, 23) and the header part (45) of the plug (24), the thin-film bridge (25) is connected by wire bonding to the electrode pins (22, 23) at the electrode pad parts (41, 42), and at least either of the electrode pad (41) or (42) of the thin-film bridge (25) is connected by the wire bonding to a metal part of the header part (45) of the plug (24).

The invention discloses an electric-controllable combustion solid propellant based on perchlorate and a preparation method thereof. By weight, the electric-controllable solid propellant is prepared by the following raw materials: 35-90 parts of an oxidant, 10-30 parts of an adhesive, 0.1-2 parts of a cross-linking agent, 0.2-10 parts of a plasticizer and 5-20 parts of a metal fuel, wherein the oxidant is the perchlorate. The electric-controllable solid propellant has the better air humidity stability and high-temperature resistance, the difficulty of the preparation technology is low, the preparation process is simple, the operation is easy, and the safety coefficient is high.

A gas generator including a plug (24) having a header part (45) and two or more electrode pins (22, 23), a thin-film bridge (25) having electrode pads (41, 42), and a squib (10) in which upon supply of electric current to the thin-film bridge (25) via the electrode pins (22, 23), the thin-film bridge (25) is activated to ignite ignition materials (26, 27), wherein the thin-film bridge (25) is arranged into a hollow (32) prepared at the plug (24) in such a manner that the thin-film bridge (25) is kept approximately on a level with the head (35) of the electrode pins (22, 23) and the header part (45) of the plug (24), the thin-film bridge (25) is connected by wire bonding to the electrode pins (22, 23) at the electrode pad parts (41, 42), and at least either of the electrode pad (41) or (42) of the thin-film bridge (25) is connected by the wire bonding to a metal part of the header part (45) of the plug (24).

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.

An autoignition composition 14 is provided to manage the safe combustion of a primary gas generant composition 12. The autoignition composition 14 contains carboxylic acid and potassium chlorate. A method of managing the safe combustion of the primary gas generant composition 12 is also provided.

The invention relates to an Al / CuO / porous graphene nano-composite energetic material and a preparation method thereof and belongs to the technical field of preparation of nano-composite energetic materials. According to the method, induced assembly is performed by means of high adsorption power of porous graphene, so that the contact distance between powdered Al and CuO is increased, mass transfer distance is reduced, meanwhile, the contact area of powdered Al and CuO is increased, the chemical kinetic action of the material is enhanced, energy release rate is controlled, combustion speed is increased, combustion efficiency is improved, specific impulse is improved, and detonation reaches a more ideal state; the preparation process is convenient to operate, the method is simple, safe and low in cost, and product purity is high.

A solid state moderated chemical reaction for use with a heating device comprises the complete reaction between iron powder and the oxidizer sodium chlorate in stoichiometric balance such that the oxygen, rather than being emitted externally to the device, is fully reacted internally in the heating device to a solid oxide. A heating device comprises a heating chamber defining an interior space for receiving and storing a substance to be heated, a heater for use as a source of heat which includes a reaction chamber, a solid state reaction composition disposed within the reaction chamber such that it is physically isolated from and in thermal communication with the interior space of the heating chamber, an activation mechanism in communication with the composition disposed within the reaction chamber, and wherein the reaction composition is inert until the activation mechanism is actuated. Activation mechanism comprises an actuator having a user interface portion and an actuation portion, and the actuation portion carries a reaction initiation material that, when assembled with the heater, is capable of initiating a chemical reaction in the chemical composition when the actuation portion is actuated by a user. Heater comprises a housing defining an exterior shape of the heater and an interior space, a solid state chemical heating composition disposed within the interior space, and an activation mechanism in communication with the composition and having an actuator and disposed within the housing such that the activation mechanism is actuable exteriorly from the housing. Heater may be incorporated into the heating device, or alternatively may be modular and removably coupled to heating device. Heater may include an opening, or alternatively may be fully sealed for emission-free operation as well as to assure a controlled internal environment and to promote stability during storage. Various passive and active thermal controls based on physical or chemical responses of materials to temperature and appropriate to important use conditions for heating device are also provided.

The invention relates to a potassium chlorate-free and sulfur-free fragrant environmental- protection safety powder of firecrackers and its components are compounded of potassium perchlorate, Al powder, perlite powder and sandalwood powder. It has simple formula, a few components, good chemical stability and safety, no potassium chlorate and no sulfur, eliminates the defects of strong impact and friction sensitivity, high danger, etc, and has the advantages of low mechanical sensitivity and high safety, excellent bang rate of setting off firecrackers and sound level value.

A yellow smoke composition useful in hand held signals, such as the U.S. Army M194 yellow smoke parachute signal; which composition contains the nontoxic, environmentally safe, quinoline solvent yellow 33 color agent and critically exhibits the requisite dense yellow smoke for the requisite 9 to 18 second burn time upon use. Further, this inventive yellow smoke composition can be used in current metal tubes and in other media, such as biodegradable cardboard tubes.

An oxidant of firecracker consists of potassium perchlorate 20-40wt%, nitrate 30-50wt%, passive filler 5-20wt% and active agent 5-10wt%. It achieves better safety, low cost, no pollution, stable physic and chemical performances and good hear-resisting property.

A composition of matter capable of producing a nontoxic smoke upon combustion comprising a smoke formulation. The composition of matter further comprises an oxidizer selected from the group consisting of potassium chlorate and sodium chlorate. The smoke formulation further comprises a fuel.

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 of 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.

The invention discloses a modular smokeless firework emission ammunition with a multi-hierarchy hole structure. The modular smokeless firework emission ammunition comprises nitrocotton which contains a large number of tiny holes and has a cylinder appearance; a fire transmission hole is formed in a cylinder ammunition block along an axial direction of the cylinder; and the size and the number of the fire transmission hole are determined according to an aperture of an emission tube. A preparation method for the modular smokeless firework emission ammunition comprises the following steps of: mixing granular micro-hole firework ammunitions and an adhesive; forming by using a die with a die needle according to a die-pressing method; and drying to obtain the modular smokeless firework emission ammunition with the multi-hierarchy hole structure. Compared with the modular emission ammunition without any fire transmission hole, the modular smokeless firework emission ammunition has the advantages that: the initial combustion area is increased, the combustion time of the emission ammunition is shortened, and the stability and the consistency of the emission ammunition of a firework product are relatively high. Furthermore, the modular emission ammunition has a relatively remarkable gradually-increased combustion characteristic, so that the energy utilization rate of the firework emission ammunition can be increased remarkably.

Disclosed is a safe firecracker comprising the inner ball powder and outer shuck powder. The raw material of the inner ball powder comprises oxidable cuprum, magnesium aluminum alloys, and red lead power. The raw material of the outer shuck power comprises potassium chlorate, barium nitrate, phenolphthalein colophony, charcoal, magnesium aluminum alloys, PVC and Strontium carbonate. The whole forms chain pellet, and to be adhibited with the adhesive tape. Its advantages are that the customer need not worry about striking and friction, to be able to bear high temperature, not to worry about pyrotechnics, to be able to keep effective for 6 to 8 years and to transport safety. Thus it is a perfect and safe firecracker.

The invention discloses a red flashing star fro manufacturing fireworks, which is made up of red flashing inner core, middle contained powder and firing powder, the red flash inner core uses red flash agent, potassium perchlorate, magnesium powder and strong flour as primary elements, the contents are 45-50%, 26-30%, 16-20%, 5-6% respectives above mentioned materials are blended together, and adds in some water as diluter, and produces them into small ball of red flash inner core, then they are palletized according to the powder, then carries on drying and acquires the product. The red flash agent is the compound of strontium carbonate, potassium dichromate, and rare metal materials. The invention has characters of non humidifying, stable, fresh, and low cost.

The invention discloses a four-layer composite effect dynamic circulation combination firework which comprises first single drums and second single drums, wherein the first single drums and the second single drums are consistent in inner diameter and height specification. The plurality of first single drums and the same number of second single drums are parallelly combined in a mode of one-by-one arrangement at intervals to form drum rows, and the adjacent first single drums and second single drums are connected through leads. A plurality of drum rows are laterally oppositely arranged to form a sector structure, the sector structure refers to the facts that the bottom of each drum row draws close, the tops of the drum rows are separated, and the drum rows are in series connection through the leads according to the setting-off sequence; joint effects of various means such as corresponding design of lead adjustment, drum bodies and a combination structure thereof and medicament dose matching and the like are combined, ever-changing dynamic pictures always maintain effect presentation of four layers in the whole firework setting-off process, the layers are clear in border and are combined harmoniously, and the pictures have high art sense of beauty.

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.

The invention provides a detonation and ignition charge in extinguishing devices and its coating process, which comprises mixing potassium perchlorate and fine ball-type aluminum dust into solid article, mixing with external adhesive solution, coating onto the main charge and ignition surface, then air-drying.

The invention discloses a safety and environment-friendly firework composite material and a preparation method thereof. The safety and environment-friendly firework composite material is prepared fromthe following raw materials in parts by weight: modified nitrocellulose, terephthalic acid, perlite powder, modified carbon powder, potassium perchlorate, aluminum hydroxide, antistatic acrylic resin, potassium hydroxide, potassium hydrogen phthalate, a stabilizing agent, single-base powder, strong agent powder and water. The preparation method of the safety and environment-friendly firework composite material comprises the steps of preparation of raw materials, preparation of dispersion liquid, preparation of composite materials, forming and filling of shoot chargepropellant for fireworks. According to the preparation method disclosed by the invention, by taking the modified nitrocellulose, the perlite powder and the modified carbon powder as main raw materials, the smoke occurrence quantity and the amount of air residues are extremely small during combustion and no smoke is produced through visual inspection; in addition, the smoke does not contain sulfide and does not produce sulfide exhaust gas after combustion, so that good environmental protection performance is achieved; meanwhile, the modified nitrocellulose, the perlite powder and the modified carbon powder are combined to realize good moisture-proof performance; the propellanta drug is stable and can be stored and transported for a long time; besides, the safety of production storage and transportation is ensured.

Electrically ignitable caseless propellant charge in the form of a caseless propellant tablet (5), characterised in that it is obtainable by mixing together of at least one current-conductive material in dissolved or dispersed form or powder form and graphite in powder form, together with nitrocellulose, with or without addition of further additives, and subsequent compaction to form a propellant tablet, the production and use thereof, and related subject matter of the invention. Uses include: use of the propellant charge in a bolt-driving tool for installing bolts, as an explosive charge in a warning shot device, as a gas-generating element in airbags, for driving cutting devices, for driving pressing devices (for example for squeezing tong-like elements together) or as a propellant charge in small calibre rifles for sporting purposes, or for captive bolt devices for animal slaughtering.

The present invention relates to a potassium perchlorate fire crackers powder. Its composition includes (by wt%) potassium perchlorate (KClO4) 38.46%-52.63%, sulfur (S) 17.39%-31.82%, aluminium powder (AL) 12.5%-23.81% and ground perlite 8.33%-15.38%. It is safe and low in cost, and its explosive effect is identical to that of potassium chlorate.