31results about "Nitrated pentaerythritol explosive compositions" patented technology

A secure authorization server computer system for verifying an identity of an end-user is provided. The computer system is programmed to receive, from a computing client, an authentication request at an authorization component. The authentication request includes a secure authentication request identifier. The computer system is also programmed to validate the authentication request at the authorization component by validating the secure authentication request identifier. The computer system is further programmed to transmit an authentication response from the authorization component to the computing client. The authentication response includes an authorization code. The authorization code represents a validation of the authentication request.

The invention discloses a method and a device for preparing a nanometer-eutectic energetic material. The method comprises the following steps that an energetic material is dissolved in a good solvent and then is transported into a temperature gradient heating furnace through inert gases in an ultrasonic spray manner, and then nanometer-eutectic energetic material crystals are collected through a high-voltage electrostatic field and the good solvent and the inert gases are cooled and recovered. The device used in the method is formed by sequentially communicating an ultrasonic device, the temperature gradient heating furnace, the high-voltage electrostatic field and a receiving device in a sealing manner. The method can prepare the energetic material crystals with the crystal size being 20-1000nm, is wide in preparation range, and can realize continuous operation. The preparation method is simple in procedures and is easy to operate, reaction conditions are mild and are easily controlled, and the method can be applied to various kinds of eutectic explosives. The crystal grains of the prepared nanometer-eutectic energetic explosives are uniform, and the purity is larger than 99.9 percent. Waste liquid in the preparation procedures is recovered, and the minimum pollution to the environment is realized.

An explosive charge such as a cast booster charge (10, 110, 210) includes an explosive charge (14, 114, 214) having a first explosive matrix material (114a, 214a) with discrete bodies (118, 218) of a second material embedded therein. In some embodiments, discrete bodies may comprise explosive material and the first explosive matrix material (114a, 214a) may be more sensitive to initiation than the explosive material of the discrete bodies (118, 218). In a separate aspect of the invention, the discrete bodies may have a minimum dimension of at least 1 millimeter or, optionally, 1.6 millimeter, regardless of the explosive properties of the material therein. In a particular embodiment, discrete bodies may be shaped as cylindrical pellets rounded at at least one end. The cast booster charge (10, 110, 210) may be produced by melting the first explosive, disposing discrete bodies therein and cooling the molten material to solid form.

The invention discloses a method for preparing an ordered porous energetic crystal material. The method comprises the following steps of: dissolving a certain amount of energetic materials in a good solvent at room temperature; adding a certain amount of crystal morphology control agents into the solution in the previous step, stirring, dissolving, and slowly adding the solution in the previous step into a poor solvent of the energetic materials and the crystal morphology control agents under the magnetic stirring conditions; continuously stirring the solution in the previous step for a certain time, filtering, and obtaining a composite material of the energetic materials and the crystal morphology control agents; adding the obtained composite material into the solvent, wherein the solvent is a poor solvent of the energetic materials and a good solvent of the crystal morphology control agents; repeatedly washing and removing the crystal morphology control agents; and drying to obtain pure ordered porous energetic crystal material. The preparation method is simple in process flow and mild in reaction conditions and suitable for various energetic materials, the reaction conditions are easy to control, and the prepared ordered porous energetic crystal material has the purity of over 99.5 percent.

The invention relates to micro initiating explosive for an exploder, and solves the problems of insecurity of the exploder with the initiating explosive and high cost of the exploder without the initiating explosive. The micro initiating explosive comprises more than one high explosive and more than one initiating explosive. The high explosive comprises hexogen and PETN; the initiating explosive comprises dinitrodiazophenol, lead azide, lead trinitroresorcinate, nickel hydrazine nitrate and perchloric acid tricarbohydrazide cadmium complex; and the more than one high explosive and the more than one initiating explosive are mixed to prepare the micro initiating explosive. Adhesive and surfactant can also be used. The micro initiating explosive has the advantages that the micro initiating explosive can reduce the content of the initiating explosive by 30 to 60 percent compared with the conventional exploder filled with the explosive, lower 20 to 30 percent of cost compared with the prior exploder, improve safety during assembly of the exploder, reduce static electricity, friction, impact and light and heat sensitivity while ensuring initiating force and flame sensitivity, improve safety during production, transportation, storage and use of the exploders, can reduce explosive feeding amount of the exploder, and improve free-running property of preparations.

A percussion primer composition including at least one explosive, at least one nano-size non-coated fuel particle having natural surface oxides thereon, at least one oxidizer, optionally at least one sensitizer, optionally at least one buffer, and to methods of preparing the same.

The present invention relates to a process for producing a fine diamond characterized by that an explosive composition containing a compound having an aliphatic hydrocarbon ring with 4 to 15 carbons, a fullerenes or a tubular or fiber carbon nanostructure having a diameter of 1 to 100 nm as a carbon raw material is exploded for explosive synthesis, and a fine diamond obtained by said process; the ultrafine particulate diamond of 1 to 3 nm is expected, as a single nano diamond, for application of the fields such as ultrafine processing, the uniform, spherical fine particulate diamond of 0.01 to 100 μm is expected as abrasive grains for polishing in precise processing and the like, and the needle diamond is expected for application in various sensors and the like.

A non-toxic and non-corrosive ignition mixture is created by combining the energy system and the pyrotechnic system. The energy system comprises a high explosive from the groups of nitroesters and nitramines and a senzibiliser of the type of tetrazene or derivatives of tetrazoles for its activation. The pyrotechnic system comprises an oxidizing agent from the group of oxides and peroxides of metals, from the group of salts of inorganic oxygen-containing acids, and a fuel which is amorphous boron. The mixture is supplemented with a friction agent which is preferably ground glass. Nitrocellulose, polyvinyl alcohol and acacia gum are used as bonding agents. Mixtures are utilizable in the field of ammunition production for the production of primers, especially for central ignition cartridges.

An initiator explosive for detonating a second explosive that includes nanocrystalline silicon containing a plurality of pores and a solid state oxidant disposed within said pores.

The invention discloses a core of a water-resistant detonating cord and a method for preparing the core. The core comprises, by weight, 15-20 parts of paraffin oil and petroleum ether saturated solution, 79.4-84.6 parts of pentaerythrite tetranitrate and 0.4-0.6 part of graphite powder. The method for preparing the core includes adding the paraffin oil and petroleum ether saturated solution and the graphite powder into the pentaerythrite tetranitrate according to raw material ratios; uniformly stirring and mixing the paraffin oil and petroleum ether saturated solution, the graphite powder andthe pentaerythrite tetranitrate with one another to obtain mixtures; granulating the mixtures; drying granules in water-bath drying tanks at the drying temperatures of 45-50 DEG C to obtain the core of the water-resistant detonating cord. The core and the method have the advantages that formulas for the core are improved, accordingly, the water resistance of the core can be integrally improved, the stability of the core can be reinforced, the storage life can be prolonged, and the explosion initiation and propagation performance of the core can be guaranteed; the water resistance and the stability of the core can be improved to the greatest extent by the aid of the method for preparing the core.

The invention relates to an eco-friendly antistatic smokeless sulfur-free cold firework chemical, and belongs to the field of environment-friendly pyrotechnic compositions. The cold firework chemicalcomprises the components: nano aluminum powder, modified pentaerythritol tetranitrate, nitrobamboo cellulose, cyclohexanone peroxide, propylene glycol stearate, dimethyl diphenyl urea, magnesium stearate, dibutyl phthalate, zinc laurate soap and shellac. The nano aluminum powder and the modified pentaerythritol tetranitrate powder are used as main components, so that safety and reliability are realized, and the combustion temperature is low; the components do not contain chlorine elements and sulfur elements, cyclohexanone peroxide is introduced, sufficient combustion is guaranteed, no toxic or harmful smoke is generated, and preparation of the smokeless and sulfur-free cold firework chemical can be truly achieved.

The invention discloses a low-energy flexible detonating cord which comprises a core wire. An explosive core is attached to the outer surface of the core wire; the outer surface of the explosive coreis wrapped with a polyester film; the outer surface of the polyester film is wound with two layers of polyester silk; and the outer surface of the polyester silk is coated with an outer coating. The low-energy flexible detonating cord releases less energy after blasting; according to the invention, surrounding blasting vibration is small, blasting noise is low, the blasting effect is good, the product flexibility is improved, the bending performance is improved, the overlapping effect of a main line and a side branch line in engineering blasting is improved, the propagation interruption phenomenon caused by untight overlapping in engineering blasting is reduced, and the construction reliability is improved.

The invention discloses 2-nitro-2-aza adamantane-4, 6, 8-triol trinitrate and a preparation method of the 2-nitro-2-aza adamantane-4, 6, 8-triol trinitrate. According to the method, 9-hydroxyl bicyclo [3.3. 1] nonane-2, 6-diketone is used as a raw material, the 2-nitro-2-azaadamantane-4, 6, 8-triol trinitrate is finally synthesized through the steps of hydrazone formation, elimination, epoxidation, cyclization, acetylation, nitration and the like, the compound has higher density and energy, the synthesis method is simple, the yield is high, and the performance is stable.

GMG explosion hardening explosive relates to the technical field of explosives, and in particular relates to a special explosive for high-manganese steel pieces explosion hardening treatment. The invention mainly addresses the problem that the effect of a mechanical method for high manganese steel piece hardening is not ideal. The GMG explosion hardening explosive comprises, by weight, 40-80% of a main explosive cyclonite, 10-30% of a high-molecular material and 10-30% of a plasticizer. The high-molecular material is a collodion; the plasticizer is acetyl tributyl citrate; the plasticizer is triacetin; the plasticizer is tributyl acetyl citrate and triglyceride triacetate in the weight ratio of 1:1. A density additive accounts for 0.1% of the total weight of cyclonite and the high-molecular material. The explosive has the advantage of good hardening effect on high-manganese steel pieces after explosion.

The invention relates to a thermostable indoor set-off smokeless sulfur-free cold firework medicament and a preparation method thereof, and belongs to the field of environment-friendly pyrotechnic compositions. The firework medicament is composed of the components: nano titanium-magnesium powder, modified pentaerythritol tetranitrate, zirconium deuteride, dihydroxy glyoxime, nitrobamboo cellulose,dimethyl diphenyl urea, zinc stearate, nitro tert-butyl triol trinitrate, polyethylene wax and diatomite. The nano magnesium-aluminum powder and the modified pentaerythritol tetranitrate powder are used as main components, so that the setting-off temperature is low, and safety and reliability are realized; dihydroxy glyoxime and zirconium deuteride are introduced, so that sufficient combustion and bright color are ensured; the components do not contain chlorine elements and sulfur elements, so that no toxic and harmful smoke is generated; self-made nitrated bamboo cellulose is adopted, and dimethyl diphenyl urea is introduced, so that the compatibility and the mechanical property of the cold firework medicament can be effectively improved, the safety performance of the cold firework medicament is remarkably improved, the safety and the reliability of the cold firework medicament are guaranteed, and an excellent setting-off effect is achieved.

The invention discloses an insensitive taian and a preparation method thereof, in order to solve the problem of low safety performance in the process of the prior art. The insensitive Taian of the present invention is made by covering Taian with a mixture of a thermoplastic elastomer and a flame retardant as a desensitizing agent, and the thermoplastic elastomer is butanediol-succinic acid-adipic acid copolymer, so The flame retardant mentioned above is dioctyl phthalate, and the particle size of said Taian is 50 μm-80 μm. It consists of the following components in mass percentage: 0.5%-10.1% of butanediol-succinic acid-adipic acid copolymer, 0.3%-0.9% of dioctyl phthalate, and 89.1%-98.5% of Taian. The invention effectively reduces the mechanical sensitivity of Taian itself and its flexible explosive, improves the safety performance of the flexible explosive preparation process, does not affect the performance of the original explosive formula, has simple preparation process and low cost, and is suitable for popularization and application in large quantities.

The invention discloses a double-sided pressure-sensitive explosive tape and a preparation method thereof. The problems such as poor adhesion and low strength of existing flexible explosives are solved. The double-sided pressure-sensitive explosive tape includes a flexible explosive layer, both sides of the flexible explosive layer are coated with pressure-sensitive adhesive layers, and release material layers are attached to the pressure-sensitive adhesive layers on at least one side. During preparation, both sides of a sheet-shaped flexible explosive are uniformly coated with pressure-sensitive adhesives, and release materials are attached to the outside of the pressure-sensitive adhesives on at least one side. The double-sided pressure-sensitive explosive tape has the advantages such ashigh adhesion, good attachment performance, good explosion effect, convenient use and operation and simple process.