55results about "Ammonium perchlorate explosive compositions" patented technology

The invention discloses a two-dimensional metal oxide composite reduced graphene oxide burning rate catalyst, which is prepared by the following steps: uniformly grinding glucose, ammonium nitrate and transition metal nitrate, calcining at high temperature to generate a two-dimensional metal oxide nanosheet, mixing the two-dimensional metal oxide nanosheet with surfactant modified reduced graphene oxide powder, and sintering at high temperature to obtain the two-dimensional metal oxide composite reduced graphene oxide burning rate catalyst. And transferring into a high-pressure hydrothermal kettle for solvothermal reaction, so that the reduced graphene oxide and the two-dimensional metal oxide nanosheet are compounded to form the composite burning rate catalyst with a 2D-2D structure. Two two-dimensional materials are compounded through a solvothermal method, the defects of accumulation of reduced graphene oxide and aggregation of the two-dimensional metal oxide due to high surface energy are effectively avoided, meanwhile, the high conductivity of the reduced graphene oxide is utilized, the synergistic catalysis effect of the metal oxide and the carbon material is enhanced, and the performance of the composite material is improved. The composite material has a good catalytic effect on the thermal decomposition process of ammonium perchlorate.

The present invention discloses a copper-containing hydrogen-bond organic framework material, a preparation method, and an application thereof. The method comprises the following steps: mixing trimesic acid, melamine, and a copper salt and dispersing them in a solvent to obtain a mixed suspension; transferring the mixed suspension to a reactor for reaction to obtain a copper-containing hydrogen-bond organic framework material solution; cooling the copper-containing hydrogen-bond organic framework material solution, centrifuging it, and then post-treating the copper-containing hydrogen-bond organic framework material solid obtained by centrifugation to obtain a copper-containing hydrogen-bond organic framework material with a one-dimensional rod-shaped structure. When used in the thermal decomposition catalysis of ammonium perchlorate, the copper-containing hydrogen-bond organic framework material prepared by the present invention can exhibit high catalytic activity and stability, thereby concentrating the exothermic temperature range and heat release of ammonium perchlorate.

A method for recovering ammonium perchlorate from a solid composite propellant, the method being carried out at a temperature of less than 50° C. involving maceration of solid composite propellant fragments in the form of an aqueous suspension, the method being terminated when the ionic conductivity in the aqueous suspension reaches a stabilized value, of less than 60 mS / cm.

The invention discloses application of ferrocenyl conjugated microporous polymers Fc-CMPs in a composite solid propellant and the composite solid propellant, the ferrocenyl conjugated microporous polymers Fc-CMPs are porous organic polymers which take ferrocenyl groups as conjugated functional units and are connected through covalent acetylenic bonds, and the ferrocenyl conjugated microporous polymers Fc-CMPs have excellent thermal stability and permanent porosity, and can be used for preparing the composite solid propellant. The material is solid powder, is insoluble in a traditional organic solvent and does not migrate, and a ferrocene unit serves as a constituent part of a polymer framework and an oxidation-reduction active site and is dispersed in a two-dimensional conjugated network structure of a composite solid propellant. When being used as a burning rate catalyst to be applied to AP decomposition, the ferrocene burning rate catalyst can obviously reduce the high-temperature decomposition peak temperature of AP, and solves the migration problem of a traditional ferrocene burning rate catalyst in a composite solid propellant system. The Fc-CMPs are applied to an AP decomposition catalysis scene for the first time, and a new direction is provided for development of a composite solid propellant burning rate catalyst.

The invention relates to a composite solid propellant comprising: - a crosslinked polyurethane binder, which is the reaction product of a polyol polymer and a polyisocyanate crosslinking agent, in the presence of a crosslinking catalyst; - ammonium perchlorate; - optionally aluminum; - optionally a ballistic catalyst; - at least one additive comprising a functionalized organic compound comprising 30 to 50 carbon atoms. Figure for the abstract: Fig. 1.

The invention belongs to the technical field of ammonium perchlorate modification, and particularly relates to a low-sensitivity ammonium perchlorate composite material and a preparation method thereof. The preparation method of the composite material comprises the following steps: (1) mixing diethanol amine and an insensitive material to obtain a coating material; (2) adding a part of ammonium perchlorate into a stirrer according to a sandwich type feeding method, spreading the bottom of the stirrer, adding a coating material, finally adding the rest ammonium perchlorate, lifting a stirrer material cylinder, and starting a stirring reaction when the bottom of a stirring paddle is about to touch the material; and (3) after the reaction is finished, stirring and cooling the reaction system to obtain the ammonium perchlorate composite material with low friction sensitivity and impact sensitivity. The process provided by the invention is suitable for preparing low-sensitivity ammonium perchlorate with various particle sizes, has the advantages of simple process flow, good reproducibility, easiness in amplification and almost no pollution to the environment, and does not influence the performance of ammonium perchlorate while reducing the sensitivity of ammonium perchlorate.

The invention discloses a low-combustion-temperature oxygen-deficient high-pressure-index rich-combustion fuel gas generating agent which comprises the following components in percentage by mass: 50-70% of an oxidizing agent; 12%-30% of hydrocarbon solid fuel; 0-2.5% of a combustion rate regulator; 9%-17% of an adhesive; 0-3.5% of a plasticizer; and 0.7-1.3% of a curing agent. The invention also discloses a preparation method of the fuel gas generating agent. According to the low-combustion-temperature oxygen-poor type high-pressure-index rich-combustion gas generating agent, the gas temperature ranges from 1100 K to 1600 K, the pressure index ranges from 0.5 to 0.8, the oxygen coefficient ranges from 0.3 to 0.45, the total molar ratio of rich-combustion gas ranges from 60% to 84.8%, rich-combustion gas is provided for a rotary detonation engine, and a power source is provided for a solid attitude and orbit control engine.

The application provides an oleic acid amide compound, a preparation method and a method for improving propellant performance, and the method for improving propellant performance comprises the following steps: adding the oleic acid amide compound into a solid propellant with a solid content greater than or equal to 90% as an additive for reducing the viscosity of a solid propellant slurry and improving the flow leveling property of the solid propellant slurry. The oleic acid amide compound of the application can significantly improve the wetting state of solid particles and a binder system of the propellant, so that the solid particles are easily dispersed, the structural strength hindering the flow in the slurry is reduced, the yield value and the viscosity of the slurry are reduced, and the flow leveling index of the slurry is improved. The application effect of the oleic acid amide compound in the solid propellant with a solid content greater than or equal to 90% is good.

The application discloses a kind of nitrogen-rich oxygen three-component high-energy density materials and synthesis method thereof.By introducing high-energy or low-sense energetic anion and cation to regulate neutral compound performance is the most direct and effective way to alleviate the contradiction between energy and stability of energetic material,can fundamentally realize the dual promotion of energy and stability.Nitrogen-rich compound 4,5-diamino-3-aminomethyl-1,2,4-triazole is used as substrate,ionization reaction is carried out with perchloric acid,then hydroxylamine ion is introduced by intermolecular force,obtains nitrogen-rich oxygen three-component high-energy density material.The synthesis method has the characteristics of easy-to-obtain raw materials,operation is simple,high safety,high yield and the like.

The present invention relates to a solid composite propellant comprising: 5.0% to 20.0% by weight of a polyurethane crosslinked binder that is the reaction product of a polyester polyol and a polyisocyanate crosslinker in the presence of a crosslinking catalyst; 20.0% to 90.0% by weight of ammonium perchlorate; optionally, up to 25.0% by weight of aluminum; optionally, up to 5.0% by weight of a combustion catalyst; and optionally, up to 20.0% by weight of at least one additive.

The invention relates to the use of nanocatalysts with a high catalytic activity for the thermal decomposition of ammonium perchlorate (AP). To obtain these materials, magnetite nanoparticles (Fe3O4 NPs) were functionalized with two different groups of amine derivatives, tertiary amine (Fe3O4 NPs-A1) and quaternary amine (Fe3O4 NPs-A2). These nanocatalysts allow a lower activation energy to be obtained, accelerating the thermal decomposition of ammonium perchlorate.

The invention discloses a display shell capable of generating a yellow smoke effect, which consists of a spherical shell body filled with explosives and effect powder and a paper cup seat loaded with propellant powder, and further comprises an ignition lead and a blasting fuse. According to the display shell provided by the invention, through the three-section synergistic effect of the effect powder, the explosive and the propellant powder, stable generation and high-altitude release of yellow smoke are realized. The effect drug takes 3, 6-diamino-10-methyl acridine hydrochloride as a color development core and is supplemented by a barium nitrate / strontium carbonate composite oxidant system; the explosive triggers the effect explosive to release through a high-heat reaction of aluminum powder-barium nitrate; the propellant ensures that the display shell is accurately lifted off through high-energy output of potassium perchlorate-magnesium aluminum alloy. The three formulas form synergy in three aspects of energy transfer, oxidant complementation and combustion regulation, so that the yellow smoke has the advantages of stable color development, uniform diffusion and long duration.

The invention relates to the technical field of solid rocket propellants, and particularly discloses a phosphoric acid modified cyclic borate bonding agent and a preparation method and application thereof.The bonding agent does not contain nitrogen atoms, contains a cyclic structure, further introduces high-polarity phosphorus-oxygen (P = O) groups and has multiple hydroxyl groups capable of participating in a curing reaction; the compatibility with nitrate in a high-energy propellant is good, and ammonia release caused by the adoption of a bonding agent containing amido is avoided; the catalyst has good hydrolytic stability, and can generate a bonding effect with a nitramine filler in a coordination bonding manner; by improving the surface and interface performance of the solid filler and increasing the infiltration speed of the adhesive to the solid filler, the pharmaceutical process performance of the propellant can be improved; and the polymer can also be used as a chain extender and a reinforcing agent to optimize and regulate a matrix network structure, so that the purposes of high strength and high elongation are achieved. The bonding agent can meet the development requirements of NEPE high-energy propellants on high mechanical properties and optimized process properties.

Provided are a gas generant composition, a preparation method, and a gas generator containing the composition. The gas generant composition includes components having the following contents, in percent by mass: 40% to 60% of guanidine nitrate, 25% to 50% of basic copper nitrate, 0% to 7% of ammonium perchlorate, 1% to 10% of a slag-forming agent, and 0.05% to 5% of a release agent / lubricant, the slag-forming agent is used as a form-retaining agent, so that the tablets can retain their form before combustion very well after combustion, thereby completely avoiding burning of an inflatable bag due to melting and splashing of the combusted tablets. Moreover, ammonium perchlorate is used as auxiliary oxidizers, thereby reducing the amount of basic cupric nitrate used and reducing molten copper residues. The gas generant composition is mainly used in a gas generator for vehicle airbag.

A gas generating composition according to various embodiments includes a fuel, an oxidant, and at least two combustion modifiers. The oxidant may be a metal nitrate, such as basic copper nitrate; the fuel may be a nitrogen-containing organic compound, such as melamine nitrate; the at least two combustion modifiers are ammonium perchlorate and potassium perchlorate. Ammonium perchlorate and potassium perchlorate are present in any ratio between 3: 1 and 1: 3, respectively, relative to each other. In some embodiments, the ratio is 1: 1. Optionally, the gas generating composition may include other ingredients, such as treatment lubricants, slagging agents, as well as other fuels, oxidants, and combustion modifiers.

The invention relates to a solid composite propellant comprising: 5.0% to 20.0% by mass of a polyurethane crosslinked binder, which is the reaction product of a polyester polyol and a polyisocyanate crosslinking agent, in the presence of a crosslinking catalyst; 20.0% to 90.0% by mass of ammonium perchlorate; optionally up to 25.0% by mass of aluminum; optionally up to 5.0% by mass of a ballistic catalyst; optionally up to 20.0% by mass of at least one additive.

The invention provides an energetic complex Cs-BTE and a continuous preparation method and application thereof.The continuous preparation method comprises the steps that 1, 2-bis (tetrazole-5-yl) ethane serves as an initial raw material, a ligand solution and a metal ion salt solution are continuously injected into a continuous flow reaction unit through an injection pump, and energetic complex crystals are obtained through filtering, washing and drying; a novel energetic complex preparation method which is simple and continuous in process and mild in reaction condition is developed, the energetic complex Cs-BTE which is novel in structure and excellent in comprehensive performance is prepared for the first time, and the energetic complex Cs-BTE has the characteristic of high thermal stability and also has the advantages of being simple and efficient in process method and safe and controllable in process; the thermal decomposition temperature of Cs-BTE is as high as 375.5 DEG C, the actually measured impact sensitivity is greater than 40J, the friction sensitivity is greater than 360N, and meanwhile, the C-BTE has a catalytic effect on thermal decomposition of ammonium perchlorate. Due to the excellent performance of the Cs-BTE, the Cs-BTE has huge application potential in the field of catalyzing the combustion efficiency of solid propellants as an energetic complex.

The present invention relates to propellant composition free from Activated Copper Chromite (ACR) having a high burn rate comprising only 0.1-0.25% of Iron oxide (Fe2O3) as burn rate catalyst. Particularly, it relates to the use of propellant composition for use in pyrogen igniters for large rocket motors. The propellant composition is devoid of Activated Copper Chromite catalyst, achieves a high burn rate, fulfils requirements of physical, mechanical and ballistic properties, has stable combustion and ensures reliable performance of the pyrogen igniters of large Rocket Motors.

The invention relates to the fields of chemical industry, pyrotechnic compositions, fireworks and crackers and the like, and relates to preparation of barium fumarate serving as a novel compound material with coloring agent and reducing agent effects, and preparation and application of the material in the fields of pyrotechnic compositions, fireworks and crackers and the like. The preparation method comprises the following steps: mixing fumaric acid and barium carbonate or barium oxide or barium hydroxide, and heating an aqueous solution to prepare barium fumarate; furthermore, the barium fumarate can be fully mixed with selected other substances to prepare a green pyrotechnic composition, and the green pyrotechnic composition is applied to fireworks and crackers and other fields; in addition, the barium fumarate is mixed with other selected substances, a small amount of perchlorate can be selectively added and fully mixed to prepare non-pyrotechnic composition or pyrotechnic composition substances in various geometrical shapes, and then the substances are placed in handheld, ground and air (including aircrafts) devices or equipment to be used for preparing the non-pyrotechnic composition or pyrotechnic composition. The non-pyrotechnic composition and the pyrotechnic composition substance can be ignited according to the electronic heating principle, and green light is emitted through combustion for color development.

This invention discloses an NPTTz-based anionic energetic complex, prepared by a volatilization method using 6-(4-nitro-1H-pyrazole-1-yl)-[1,2,4]triazolo[4,3-b][1,2,4,5]tetraazine and metal nitrates as raw materials. The NPTTz-based anionic energetic complex of this invention exhibits a detonation response upon laser irradiation, demonstrating good safety and detonation performance. It can be used as a laser-initiated detonator or as a component of explosives and propellants. Furthermore, the NPTTz-based anionic energetic complex of this invention exhibits good catalytic activity and can be used as an ammonium perchlorate catalyst, showing promising application prospects in the field of high-energy insensitive energetic materials.

The application discloses a method for adjusting TKX-50 oxygen balance based on oil-in-oil technology, comprising the following steps: dissolving TKX-50, AP and fluorine rubber into an organic solvent, adding a surfactant and an alkane, stirring and ultrasonicating to obtain an emulsion system; gradually adding ethanol into the emulsion system for extraction, slowly diffusing the organic solvent into ethanol, and gradually separating to form spherical-like compounds when TKX-50, AP and fluorine rubber reach saturation; and filtering, washing and drying to obtain a final sample. The application uniformly composites TKX-50 and AP at a nanometer scale, obtains spherical-like TKX-50 / AP compounds with regular morphology, improves the thermal decomposition performance of TKX-50, and reduces the sensitivity of TKX-50, and the significant advantages include: (1) simple preparation process, high efficiency and low cost; (2) mild experimental conditions and high product quality; (3) small proportion of non-explosive materials used, and no influence on the oxidation effect of the oxidant.

A tackifier is used resin in an energic material formulation comprising active materials and a polymeric binder to reduce or eliminate the use of a plasticiser in the formulation wherein the tackifier resin is compatible with the polymeric material.

This invention provides an energetic complex Cs-BTE, its continuous preparation method, and its applications. Starting with 1,2-bis(tetraazol-5-yl)ethane, a ligand solution and a metal ion salt solution are continuously injected into a continuous flow reaction unit via a syringe pump. After filtration, washing, and drying, energetic complex crystals are obtained. This invention develops a novel, simple, continuous, and mild method for preparing energetic complexes. For the first time, an energetic complex Cs-BTE with a novel structure and excellent overall performance was prepared. In addition to high thermal stability, Cs-BTE also possesses the advantages of a simple, efficient, safe, and controllable process. The thermal decomposition temperature of Cs-BTE reaches 375.5℃, with a measured impact sensitivity greater than 40 J and a friction sensitivity greater than 360 N. It also exhibits a catalytic effect on the thermal decomposition of ammonium perchlorate. The superior performance of Cs-BTE makes it a promising energetic complex for catalyzing the combustion efficiency of solid propellants.

To provide a composite propellant which is improved in both combustion characteristics and manufacturability and has high flowability.SOLUTION: A composite propellant contains a hydroxyl-terminated polybutadiene, ammonium perchlorate, and an iron oxide having a tap density of 0.3-1.3 g / ml. This composite propellant enables the improvement in both combustion characteristics and manufacturability and a high flowability by using the iron oxide having the tap density of 0.3-1.3 g / ml as a combustion catalyst in the propellant.SELECTED DRAWING: None

The invention discloses a trinuclear ferrocene-based metal composite material and a preparation method and application thereof, and belongs to the field of burning rate catalysts.The preparation method comprises the steps that ferrocenyl acetaldehyde and ferrocenyl dihydrazone are dissolved, then heating reflux is conducted, purification treatment is conducted, a trinuclear ferrocene ligand is prepared, the trinuclear ferrocene ligand is dissolved in a solvent, a mixed solution A is prepared, and the mixed solution B is prepared; dividing the mixed solution A into three equal parts, and respectively adding a Co salt solution, a Fe salt solution and a mixed solution of Co salt and Fe salt to respectively prepare the trinuclear ferrocene-based metal composite materials of Fc3N4 / Co, Fc3N4 / Fe and Fc3N4 / CoFe. The technical problem that a burning rate catalyst prepared by an existing preparation method is not high in pyrolysis catalytic performance on ammonium perchlorate is solved.

The application discloses a method for reducing the sensitivity of ammonium perchlorate by adopting a polydopamine / fluorine-containing silane composite coating, and comprises the following steps: (1) dispersing ammonium perchlorate in an organic solvent, stirring to obtain a milky white suspension; (2) adding a catalyst dropwise into the suspension, stirring, uniformly mixing, then adding fluorine-containing silane and dopamine hydrochloride, and reacting at room temperature for 6-24 hours; the catalyst is an amine compound; (3) filtering, washing with the organic solvent until the color of the filtrate is clear, drying, and obtaining modified ammonium perchlorate particles. The application realizes uniform and complete coating of the polydopamine coating on the ammonium perchlorate by one-step method, meanwhile, the fluorine-containing silane is introduced to crosslink the polydopamine coating, effectively improves the interface coverage of the polydopamine on the ammonium perchlorate, reduces the sensitivity of the ammonium perchlorate, and reduces the hygroscopicity of the ammonium perchlorate.

The invention relates to the technical field of AP (ammonium perchlorate) modification, in particular to a preparation method of an ammonium perchlorate anti-moisture-absorption material coated with silicon dioxide based on double-silane synergistic modification through a wet method. Silicon dioxide is subjected to two-step synergistic modification through a long-chain alkylsilane modifier and a short-chain alkylsilane modifier; the preparation method comprises the following steps: modifying the surface by using long-chain silane, filling long-chain silane modified gaps by using short-chain alkyl to prepare modified nano silicon dioxide particles, and coating superfine AP particles with the modified nano silicon dioxide particles through wet modification, the modified nano silicon dioxide particles have enough steric hindrance and better hydrophobicity due to a three-dimensional structure on the surface, and the AP can be effectively prevented from being agglomerated after being coated with the modified nano silicon dioxide particles; the method is green and pollution-free, the process is simple, the comprehensive performance can be easily controlled through simple adjustment, the problem that the ultra-fine AP particles produced industrially are prone to moisture absorption and caking can be solved, and the application range of the ultra-fine AP particles in novel high-energy propellants is widened.

Additive-manufactured fuel grains for hybrid rocket engines (HREs) and method of manufacturing the same are disclosed herein. The additive-manufactured fuel grain has an infill density and an infill geometry selected to provide a predetermined burn profile. The method of manufacturing the fuel grain comprises operating an additive-manufacturing system to fabricate a fuel grain having an infill density and an infill geometry selected to provide a predetermined burn profile.

The invention relates to the fields of chemical industry, pyrotechnic compositions, fireworks and crackers and the like, and relates to preparation of strontium fumarate serving as a novel compound material with coloring agent and reducing agent effects, and preparation and application of the material in the fields of pyrotechnic compositions, fireworks and crackers and the like. The preparation method comprises the following steps: mixing fumaric acid and strontium carbonate or strontium oxide or strontium hydroxide, and heating an aqueous solution to prepare strontium fumarate; furthermore, strontium fumarate can be fully mixed with selected other substances to prepare a red pyrotechnic composition, and the red pyrotechnic composition can be applied to fireworks and crackers and other fields; in addition, strontium fumarate is mixed with other selected substances, a small amount of perchlorate can be selectively added to be fully mixed to prepare non-pyrotechnic composition or pyrotechnic composition substances in various geometrical shapes, and then the substances are placed in handheld, ground and air (including an aircraft) devices or equipment to be used for preparing the non-pyrotechnic composition or pyrotechnic composition. The non-pyrotechnic composition and the pyrotechnic composition substance can be ignited according to the electronic heating principle, and red light is emitted through combustion for color development.

The present disclosure provides a gas-generating agent composition, a gas-generating agent, and a preparation method and the use. The gas-generating agent composition comprises the following components, in percentages by mass: 30-70% of guanidine nitrate, 20-60% of basic copper nitrate, 0-10% of basic copper carbonate, 1-10% of ammonium perchlorate and 1-15% of a slag-forming agent, wherein the slag-forming agent comprises a first component and a second component, the first component being selected from aluminum hydroxide, and the second component being selected from at least one of a zirconate and a silicate.