23 results about "Dimethyl methylphosphonate" patented technology

The invention discloses a special gradient flame-retardant explosion suppressant for a high-energy-density ternary lithium battery, and relates to the technical field of safety protection of new energy batteries, the gradient flame-retardant explosion suppressant comprises the following components by mass: 30% of trimethyl phosphate, 16% of dimethyl methylphosphonate, 13% of triphenyl phosphate, 32% of a solvent, and 9% of a composite stabilizer; the compound stabilizer is prepared from 2, 6-di-tert-butyl-4-methylphenol, diisooctyl adipate and dibutyl sebacate according to the mass ratio of 2 to 1 to 1. The invention also provides a preparation method of the gradient flame-retardant explosion suppressant. Through formula optimization, especially adjustment of the composite stabilizer and reinforcement of a raw material pretreatment process, the explosion suppressant can be stably stored and operated within the range of-40 DEG C to 50 DEG C, the application limitation in extremely cold and high-temperature areas is solved, and the explosion suppressant is suitable for most of extreme temperature environments in the world.

The invention relates to an extraction agent and an extraction method, and relates to the technical field of wet extraction of industrial solid waste, and the extraction agent comprises the following components in parts by mass: an extraction main agent, an anti-impurity stabilizer and an extraction aid; the extraction main agent comprises di (2-ethylhexyl) phosphate and mono (2-ethylhexyl) phosphate, the impurity-resistant stabilizer comprises an imidazoline derivative, a triazine derivative and dimethyl methylphosphonate, and the extraction assistant comprises isooctyl alcohol; the extraction method comprises the steps of ash ball preparation, impurity removal, extraction and the like. According to the extraction agent and the extraction method, interference impurities such as trace heavy metal ions, sulfides and cyanides generated due to component fluctuation in the purified ash of the calcium carbide furnace are selectively chelated, the impurities are prevented from being combined with the extraction main agent, and then the anti-interference stability of the extraction agent under the condition that the impurity content of the purified ash of the calcium carbide furnace fluctuates is improved; and the control difficulty in the production process is reduced.

The invention discloses a room-temperature DMMP sensor based on a platinum diselenide van der Waals heterojunction, and relates to the technical field of gas sensing. The sensor comprises an electrode, a platinum diselenide layer loaded on the surface of the electrode and a nano material loaded on the surface of the platinum diselenide layer, wherein the platinum diselenide layer and the nano material form a Van der Waals heterojunction; wherein the nano material is a low-dimensional nano material such as a carbon nano tube, graphene, zinc oxide, molybdenum disulfide or tungsten disulfide. The platinum diselenide / Van der Waals heterojunction sensor realizes trace detection of dimethyl methylphosphonate (DMMP) at room temperature by using excellent performance of platinum diselenide and a synergistic effect of the Van der Waals heterojunction, has the advantages of low working temperature, high sensitivity, good stability, high response speed and the like, and can meet DMMP detection requirements in the fields of environmental monitoring, public safety and the like.

The invention relates to the technical field of flame retardants, in particular to a high-performance flame retardant suitable for a composite material and a preparation method thereof, and the high-performance flame retardant comprises the following raw materials in parts by weight: 45-55 parts of isocyanate, 45-55 parts of polypropylene triol, 5-10 parts of dimethyl methylphosphonate and 2-10 parts of an additive. According to the invention, a base material of the additive is generated from hydrogenated tallow amine polyoxyethylene ether, KH560, KH792 and other components, the interface bonding force between flame retardant molecules and a matrix is enhanced, KH570 modified composite hydroxide, nano-silica and the like form a filler, and through wrapping and bridging of the base material in the additive, nano-scale uniform dispersion in the matrix is realized, and the base material and the nano-silica cooperate with each other, so that the flame retardant performance is improved. A firm anchoring and dispersing structure is constructed between the flame retardant and a composite material matrix, and migration and precipitation of the flame retardant due to weak interface bonding force are effectively inhibited, so that the durability of the flame retardant property is ensured.

The invention belongs to the technical field of preparation of organic phosphine flame retardants, and particularly relates to a preparation process of a dimethyl methylphosphonate flame retardant, which comprises the following steps: feeding liquid TMP into a rearrangement reaction kettle through a thermal insulation pipeline, carrying out Arbuzov rearrangement reaction to obtain a rearrangement synthetic liquid, transferring the rearrangement synthetic liquid to a distillation kettle, distilling out low fractions at first, and then distilling out low fractions at second, thereby obtaining the dimethyl methylphosphonate flame retardant. The low fraction returns to the rearrangement reaction kettle to circularly participate in the reaction, then a DMMP finished product is distilled out, and residual liquid obtained after reduced pressure distillation serves as a flame retardant to be sold or sent to qualified units to be incinerated; the low fraction which is not completely reacted contains a certain amount of TMP, and is recycled through a synthesis rearrangement reaction, so that the cost of the raw materials is greatly reduced, the recycling of the raw materials, the high-yield production of DMMP, the secondary utilization of the byproduct polycondensation phosphonate, or the compliance incineration treatment are realized, and the byproducts can be reasonably treated.

The present application relates to the technical field of polyphenyl ether, and particularly relates to a phosphonated polyphenyl ether and a preparation method thereof.The phosphonated polyphenyl ether provided by the present application has a structure shown in formula 1; the content of P element in the phosphonated polyphenyl ether is 0.5-5 wt%.The phosphonated polyphenyl ether is obtained by phosphonating modification of polyphenyl ether, and the phosphonated polyphenyl ether can achieve UL-94 V-0 level of flame retardant effect under the condition of low P element content.The present application provides a preparation method of the phosphonated polyphenyl ether, and the phosphonated polyphenyl ether can be prepared by adopting dimethyl methylphosphonate to perform nucleophilic substitution reaction on brominated polyphenyl ether.Compared with modification of polyphenyl ether by using expensive DOPO, the dimethyl methylphosphonate used in the present application is much cheaper, and the production cost is greatly reduced.

The invention provides a battery pole piece, a lithium ion battery and a preparation method of the lithium ion battery. Specifically, a coating is arranged on one side, far away from a current collector, of an active material layer of the battery pole piece; the coating is formed by crosslinking a first monomer, a second monomer, a binder and a photoinitiator; the first monomer is prepared from at least one of diethyl allyl phosphonate, triethyl phosphate, diphenyl phosphate, dimethyl methylphosphonate or melamine cyanurate; and the second monomer is prepared from at least one of ethoxylated trimethylolpropane triacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, tripropylene glycol diacrylate or trimethylolpropane trimethacrylate. The single and uniform coating not only helps to alleviate the problems of thermal runaway and cycle attenuation of the high-nickel ternary battery, but also does not need precise equipment in the preparation process, can be compatible with the existing lithium battery production line, and realizes collaborative optimization of thermal safety-cycle performance-mass production cost.

The application belongs to the technical field of fiberboard, and particularly relates to a kind of flame-retardant high-strength fiberboard and its preparation method. The fiberboard includes the following components by weight: modified wood fiber 90-100 parts, flame retardant 15-20 parts, adhesive 7-16 parts; the preparation process of the modified wood fiber is as follows: (1) wood fiber is added to ethanol, then isopropoxy titanium and trimethyl octadecyl ammonium chloride are added for heating reaction, after the reaction is completed, filtration, washing and drying are carried out to obtain pretreated wood fiber; (2) the pretreated wood fiber is added to deionized water, then dimethyl aminomethyl phosphonate, trimethoxy (3,3,3-trifluoropropyl) silane and aluminum chloride are added for reaction, after the reaction is completed, centrifugation and drying are carried out to obtain the modified wood fiber. The fiberboard has excellent mechanical properties, flame retardant properties, weather resistance and hydrophobicity.

The low-viscosity and high-color-concentration crayon is characterized by comprising the following components: wax, hydrogenated rosin, toner and a viscosity reduction modifier. The viscosity reduction modifier is at least one of dimethyl methylphosphonate and diethyl ethylphosphonate. The invention further discloses a preparation method of the low-viscosity and high-color-concentration crayon. The crayon has good plasticity and processability, and various complex shapes can be manufactured in a pouring or injection molding mode. Hydrogenated rosin is adopted as a main component, and good compatibility and stability are achieved. The viscosity reduction modifier can reduce the viscosity of the crayon during melting, improve the flexibility, temperature resistance and flame retardance of the crayon and reduce the precipitation risk.

A method of preparing an aluminum methyl methylphosphonate (AMMP) flame retardant by reacting at a reaction temperature of about 110 °C or higher for an amount of time sufficient to produce the AMMP, a reaction mixture containing an aqueous aluminum- containing methylphosphonic acid solution; and dimethyl methylphosphonate. The resulting product is intumescent.

The invention discloses a method for detecting dimethyl methylphosphonate at room temperature by using a surface modified transition metal disulfide nano material, and belongs to the technical field of biochemical safety monitoring. According to the technical scheme, the method comprises the following steps: 1) raw material pretreatment: adding 4-(hexafluoro-2-hydroxy isopropyl) aniline and water into a reaction bottle, and carrying out ultrasonic treatment; 2) acidification reaction: dropwise adding fluoboric acid into the system; 3) performing low-temperature diazotization: dropwise adding sodium nitrite into the reaction bottle; (4) crystallizing and purifying to obtain white powdery 4-hexafluoroisopropanol benzodiazepine tetrafluoroborate; 5) preparation of an activation solution: dissolving 4-hexafluoroisopropanol benzodiazepine tetrafluoroborate and potassium iodide in water; and 6) surface modification: immersing the two-dimensional transition metal dichalcogenide in the activation solution to obtain the surface-modified transition metal dichalcogenide nano material. According to the method, the specific adsorption capacity on dimethyl methylphosphonate is remarkably enhanced, and the detection limit reaches ppb level.

The present invention discloses a transparent and UV-resistant flame-retardant polyvinyl alcohol film and a preparation method thereof. The film is prepared by adding N-(2-aminoethyl)-P-methylphosphonamidomethyl ester and nano-TiO2 to polyvinyl alcohol to form a film. The N-(2-aminoethyl)-P-methylphosphonamidomethyl ester is a phosphorus-nitrogen-containing transparent liquid flame retardant prepared by reacting ethylenediamine with dimethyl methylphosphonate. According to the method of the present invention, the mechanical properties and flame retardant properties of the polyvinyl alcohol film can be significantly improved while maintaining the basic transparency of the film. In addition, the addition of a small amount of nano-TiO2 gives the polyvinyl alcohol film certain UV resistance. The high-performance flame-retardant polyvinyl alcohol film prepared by the present invention can be used in the packaging field, especially in the packaging of high-end textiles, and has broad application prospects.

The invention discloses an anti-explosion non-combustible composite board and a preparation method thereof, and relates to the technical field of anti-explosion composite materials. The anti-knock non-combustible composite board provided by the invention is composed of the following components in parts by mass: 95-110 parts of a binder which is unsaturated polyester resin; 190-210 parts of a composite flame retardant, which is a composition of aluminum hydroxide and dimethyl methylphosphonate; 190-210 parts of a high-temperature-resistant reinforcing agent which is a composition of silicon dioxide, calcium carbonate and kaolin; the functional synergist is a composition of magnesium sulfate, magnesium oxide and boric acid; 40 to 50 parts of reinforcing fiber; 270 to 300 parts of inorganic fiber cloth; 5-7 parts of a curing agent; and 3-4 parts of an accelerant. By optimizing a formula and a reasonable preparation process, the mechanical strength and high-temperature stability are remarkably improved while the combustion performance reaches A-level non-combustion and vertical combustion level V-0, and the flame-retardant material is convenient to process, can meet the requirements of the fields of electric power, chemical engineering and the like on anti-explosion, fireproof and durable properties of materials, and effectively solves the problems of low flame-retardant efficiency and poor anti-explosion performance of traditional materials.

The invention belongs to the technical field of lithium ion batteries, and provides an aluminum alkoxide-phosphate / phosphite electrolyte as well as a preparation method and application thereof. The aluminum alkoxide-phosphate ester / phosphite ester electrolyte comprises aluminum triethoxide, a phosphate ester / phosphite ester compound, an electrolyte solute and a non-aqueous solvent; the phosphate ester / phosphite ester compound is trimethyl phosphate, triethyl phosphate, triisobutyl phosphate, triphenyl phosphate, tripropargyl phosphate, tris (trimethylsilyl) phosphate, dimethyl methylphosphonate, diethyl ethylphosphonate, trimethyl phosphite, triethyl phosphite and triisopropyl phosphite, and the solvent is a solvent. The catalyst is one or more of triphenyl phosphite and tri (trimethylsilyl) phosphite. The electrolyte has good thermal stability and flame retardance under high voltage, and the safety of the battery is greatly improved; in addition, the electrolyte additive composition can inhibit the corrosion of the aluminum current collector, so that the side effect of the corrosion of the current collector on the battery is reduced.

The application provides a polyurethane resin fiber composite material and a preparation method and application thereof, and belongs to the technical field of materials. Tea fiber and tea extract are extracted and obtained, the tea fiber is carbonized and then coated with multi-fold graphene oxide on the surface, reduced, and reacted with the tea extract, and then modified by phytic acid to obtain modified tea carbon fiber; modified cellulose is prepared by modifying maleic anhydride modified cellulose; the polyol, the modified tea carbon fiber, the modified cellulose, and modified TiO2 nanospheres are mixed, a catalyst, dimethyl methylphosphonate, and glycerol are added, and stirring is uniformly carried out, isocyanate is added, and after uniform mixing, solidification forming is carried out, so that the polyurethane resin fiber composite material is obtained, has good mechanical properties and degradable properties, good antibacterial properties and environmental protection, good antistatic and flame retardant properties, realizes resource utilization of tea residues, has low cost, the preparation method is simple, and has a wide application prospect.

The invention relates to a composite finishing agent with flame-retardant, antibacterial, breathable and washable effects as well as a preparation method and application of the composite finishing agent. The composite finishing agent is prepared from the following components in parts by weight: 20 to 40 parts of waterborne polyurethane resin, 40 to 60 parts of a flame retardant, 4 to 10 parts of an antibacterial agent, 150 to 200 parts of a breathable agent, 2 to 6 parts of a silane coupling agent, 6 to 10 parts of a surfactant, 4 to 8 parts of a thickening agent and 300 to 400 parts of water, the flame retardant comprises a combination of melamine polyphosphate and dimethyl methylphosphonate; the antibacterial agent comprises a combination of nano silver and triethanolamine. The composite finishing agent provided by the invention can be applied to textiles through synergistic use of all the components, so that the textiles have the comprehensive effects of flame retardance, antibiosis, breathability and washability.

The invention discloses a high-frequency surface acoustic wave dimethyl methylphosphonate sensor and a preparation method thereof, and belongs to the technical field of gas sensors. The sensor comprises a piezoelectric substrate, an interdigital transducer arranged on the piezoelectric substrate and a gas sensitive layer formed on the surface of the interdigital transducer, the gas sensitive layer comprises a 11-mercaptoundecanoic acid material layer formed on the surface of the interdigital transducer and a zirconium-based MOF material layer formed on the 11-mercaptoundecanoic acid material layer. The invention also provides a preparation method of the sensor. The 11-mercaptoundecanoic acid and the zirconium-based MOF material layer are modified on the surface of a high-frequency surface acoustic wave device layer by layer through a molecular self-assembly technology. The sensor disclosed by the invention has high sensitivity, quick response and good repeatability on dimethyl methylphosphonate gas, is simple in preparation process and good in repeatability, and has important application value in the field of gas sensing.

The application provides a halogen-free flame-retardant laminated resin prepared from component A and component B, wherein the component A comprises modified high phosphorus-containing epoxy resin, dimethyl methylphosphonate, non-crystalline epoxy resin, silane defoaming agent, fluorosilicon defoaming agent and silane coupling agent, and the component B comprises polyether amine, isophorone amine and triethanolamine. The application also provides a preparation method of the halogen-free flame-retardant laminated resin. The halogen-free flame-retardant laminated resin provided by the application has the advantages of low viscosity, good fiber wetting, high hardness, normal-temperature curing, high transparency and good flame-retardant effect due to the selection of specific contents of components and the interaction between the components.

This invention discloses a non-combustible composite fireproof board and its preparation method, relating to the field of fireproof composite material technology. The non-combustible composite fireproof board comprises the following components by mass parts: 40 parts binder, which is unsaturated polyester resin; 80-100 parts composite flame retardant, which is a composition of aluminum hydroxide and dimethyl methylphosphonate; 80-100 parts high-temperature reinforcing agent, which is silicon dioxide; 20-40 parts high-temperature synergist, which is a composition of calcium carbonate, kaolin, and montmorillonite; 10-30 parts fiber reinforcing material; 100-130 parts inorganic fiber cloth; 2-3 parts curing agent; and 0.5-1.5 parts accelerator. This invention improves the flame retardant efficiency of the flame retardant, the high-temperature thermal stability and mechanical properties of the composite board, achieving a Class A non-combustible rating, thus realizing a comprehensive balance between the fire-retardant and mechanical properties of the non-combustible composite fireproof board.

The present invention relates to a flame-retardant antibacterial nylon 6 composite material and its preparation method and application, belonging to the technical field of flame-retardant antibacterial material synthesis. The composite material is prepared from nylon 6 slices, Zn@tannic acid (TA), copper pyromellitic acid (HKUST-1) and dimethyl methylphosphonate (DMMP). A Zn@TA@HKUST-1 antibacterial system is constructed by a layer-by-layer self-assembly method, and DMMP is then loaded into the antibacterial system by an immersion method. Wherein, the Zn@TA complex has photosensitivity and can efficiently kill bacteria under the synergistic effect of photodynamic / photothermal forces; HKUST-1 with a porous structure can adsorb smoke and poisonous gases in the early stage of combustion, and the intrinsic copper ions in the structure are slowly released, which, on the one hand, contributes to the efficient killing of bacteria, and on the other hand, can catalyze the carbonization of the material, thereby preventing further combustion of the material; DMMP releases PO· free radicals when thermally decomposed, which can capture H· and HO· free radicals in the combustion process, thereby dehydrating and carbonizing to exert a flame retardant effect.

The application discloses a kind of flame-retardant water-resistant polyether type polyurethane elastomer and preparation method thereof, and relates to the technical field of polyurethane elastomer.The application first prepares boroxin intermediate BOX, then reacts with dimethyl methylphosphonate to obtain reactive phosphorus-containing boroxin flame retardant DMPB, which is introduced into polyurethane elastomer as halogen-free flame retardant.The obtained material has significantly improved limiting oxygen index, reaches UL-94 V-0 level, and has outstanding smoke suppression and toxicity reduction effect;continuous dense carbon layer is formed during combustion, and the mechanical and adhesive properties are excellent, halogen-free, environmentally friendly, water-resistant and stable, suitable for new energy vehicles and electronic components potting and other fields with high requirements for flame retardance and water resistance.

This invention provides a biomass phosphorus-nitrogen hybrid flame retardant, its preparation method, and its application, belonging to the field of functional modification and flame retardant technology of polymer materials. The biomass phosphorus-nitrogen hybrid flame retardant has a flower-like structure and excellent flame retardancy. It is synthesized from different metal chloride salts (ferric chloride, copper chloride, zinc chloride, etc.), guanosine phosphate (5'-triguanosine sodium phosphate, 5'-guanosine triphosphate, 5'-guanosine disodium hydrate), and phosphonates (dimethyl hydroxymethylphosphonate, dimethyl methylphosphonate, dimethyl vinylphosphonate) as raw materials using co-precipitation and adsorption methods. The flame-retardant epoxy resin is formed by adding the biomass phosphorus-nitrogen hybrid flame retardant to an epoxy resin matrix and then curing it. This invention features a simple process, controllable conditions, and the resulting flame retardant exhibits high thermal stability and flame retardant properties. It also shows good compatibility with epoxy resin, significantly improving the flame retardant effect of epoxy resin and possessing broad industrial application prospects.

The invention belongs to the technical field of fiberboards, and particularly relates to a flame-retardant high-strength fiberboard and a preparation method thereof. The fiberboard comprises the following components in parts by weight: 90-100 parts of modified wood fibers, 15-20 parts of a flame retardant and 7-16 parts of an adhesive, a preparation process of the modified wood fiber comprises the following steps: (1) adding wood fiber into ethanol, then adding titanium isopropoxide and trimethyl octadecyl ammonium chloride, carrying out a heating reaction, and after the reaction is completed, filtering, washing and drying to obtain pretreated wood fiber; and (2) adding the pretreated wood fiber into deionized water, then adding dimethyl aminomethylphosphonate, trimethoxy (3, 3, 3-trifluoropropyl) silane and aluminum chloride for reaction, and after the reaction is completed, centrifuging and drying to obtain the modified wood fiber. The fiberboard has excellent mechanical property, flame retardant property, weather resistance and hydrophobicity.