15 results about "Ammonium borate" patented technology

Intumescent composition comprising an acid donor (A), a carbon donor (B), a binder polymer (C) and a blowing agent (D). The acid donor (A) is selected from the group consisting of ammonium polyphosphate, ammonium dihydrogen phosphate, ethylenediamine phosphate, ammonium pentaborate, guanylurea phosphate, diguanidine phosphate and mixtures thereof. The carbon donor (B) is selected from the group consisting of glucose, arabinose and other monosaccharides, lactose, maltose and other disaccharides, starch, cellulose, dextrin and other polysaccharides, sorbitol, erythritol, pentaerythritol, dipentaerythritol, mannitol and other polyhydric alcohols and mixtures thereof. The blowing agent is provided in the form of microsphere particles comprising a thermoplastic polymer shell encapsulating a propellant, which microsphere particles are expandable microspheres.

The application relates to a three-dimensional hollow network structure boron nitride, and a main process of a preparation method thereof is as follows: taking citric acid, sodium borate and strontium carbonate as raw materials, a boron-containing precursor is obtained through a sol-gel method; then, the boron-containing precursor is pre-nitridated under a nitrogen-containing atmosphere to obtain a pre-nitridation product; next, the pre-nitridation product is uniformly mixed with ammonium borate and ammonium chloride through ball milling, and then is placed into a high-pressure reaction kettle to react, so that the three-dimensional hollow network structure boron nitride is obtained. The three-dimensional hollow network structure boron nitride prepared by the application has a connected network structure formed by multiple cavity units, has high purity, provides a new idea for preparation of a hollow boron nitride structure, and has a good application prospect in the fields of gas adsorption, water pollution treatment, hydrogen storage and a drug carrier.

The invention relates to the technical field of aluminum soldering flux, and particularly discloses flux core soldering flux for an aluminum brazing tin wire and a preparation method and application of the flux core soldering flux. The flux core soldering flux for the aluminum brazing tin wire comprises the following components in parts by mass: 15 to 25 parts of ammonium salt, 53 to 64 parts of triethanolamine, 10 to 19 parts of zinc citrate, 1 to 8 parts of stannous salt, 0.4 to 1.2 parts of fluorine surfactant, 0.5 to 2 parts of corrosion inhibitor and 0.1 to 0.8 part of defoaming agent. The amine salt is a compound of ammonium fluoride, ammonium fluoborate and ammonium dihydrogen phosphate. The method has the advantage of improving the aluminum material welding quality.

The application discloses a processing technology of a multi-row-hole stainless steel collecting pipe and relates to the technical field of metal processing. The processing technology of the multi-row-hole stainless steel collecting pipe comprises the following process steps: pre-cleaning, temperature rising, primary cooling, secondary cooling and tertiary cooling. Magnesium propenoate is filled in the pre-cleaned multi-row-hole stainless steel collecting pipe blank, temperature rising and heat preservation are carried out, primary cooling is carried out in a mixed atmosphere of argon and hydrogen, secondary cooling is carried out in a salt tank with molten salt liquid being ammonium borate, and finally, tertiary cooling is carried out in air cooling, so that the multi-row-hole stainless steel collecting pipe is prepared. The multi-row-hole stainless steel collecting pipe prepared by the application has high impact resistance and good corrosion resistance.

This invention discloses a method for large-size ammonium fluoroborate single crystal vapor phase growth, comprising the following steps: weighing two or more compounds containing NH4, B, O, and F as raw materials in a stoichiometric ratio of 1:4:6:1, mixing them thoroughly, adding a transport agent to obtain an initial mixture, and loading the initial mixture into a crystallization vessel; during the crystal growth stage, seed crystals or suspended seed crystals are selected by geometric selection and temperature screening among the grains; the crystallization vessel is dynamically heated within the temperature gradient zone of a vertical tube furnace, the dynamic heating being achieved by independently raising or lowering the temperatures of the high-temperature and low-temperature zones to dynamically control the temperature gradient of the crystal growth zone, so as to match it with the temperature gradient required at each stage of the crystal growth process; the raw materials crystallize in the crystal growth zone under the transport agent, resulting in large-size ammonium fluoroborate crystals. This invention produces large-size single crystals, is simple to operate, and highly practical, representing a superior ammonium fluoroborate single crystal growth process.

The invention discloses a flame-retardant modified phenolic aerogel composite material and a preparation method thereof, and the method comprises the following steps: mixing phenolic resin, an alcohol pore-forming agent, a flame retardant containing phosphorus and nitrogen elements, a curing agent and a surface modifier according to a specific mass ratio to prepare a precursor solution; and dipping a fiber fabric in the solution, and sequentially carrying out curing, flame-retardant modified solvent replacement, normal-pressure drying and vacuum drying to obtain the composite material. The flame-retardant modified solvent is replaced by a boric acid solution or an ammonium borate solution. Through an innovative step-by-step flame-retardant strategy, the phosphorus-nitrogen flame retardant is fixed on a gel network, and a flame-retardant layer is introduced on the pore surface through replacement of a boron-containing solution, so that synergistic interaction of a flame-retardant function is realized. According to the method, the limit oxygen index and the thermal stability of the material are remarkably improved, meanwhile, the low-density and low-thermal-conductivity nano-porous structure of the material is well maintained, expensive supercritical drying is successfully replaced with normal-pressure drying, and the production cost is greatly reduced.

The invention discloses a low-cost high-purity potassium fluoborate preparation method based on ammonium fluoride, and belongs to the field of inorganic salt chemical industry, the method comprises the following steps: S1, reacting by-product ammonium fluoride with the purity of more than or equal to 99% with boric acid to synthesize an ammonium fluoborate solution; s2, at 60-80 DEG C, precisely dropwise adding a potassium chloride solution into the ammonium fluoborate solution at a rate of 1-2 mL / (min.L), and carrying out a replacement reaction; s3, performing crystallization and purification by adopting a two-stage gradient cooling program from fast to slow; s4, a low-temperature saturated potassium fluoborate solution and absolute ethyl alcohol are sequentially adopted for targeted washing, and impurities such as chloride ions are effectively removed; and S5, performing vacuum drying to obtain a product. According to the method, the phosphorus fertilizer industrial byproduct ammonium fluoride is originally adopted to replace expensive hydrogen fluoride or fluoboric acid, so that the raw material cost is reduced by 90% or above; meanwhile, impurity inclusion is effectively inhibited, the problem of impurity introduction caused by byproduct raw materials is solved, and the electronic-grade high-purity potassium fluoborate with the main content larger than or equal to 99.95% and the chloride ion smaller than or equal to 10 ppm can be stably prepared.

This invention discloses a high-strength corrosion-resistant pipeline steel component and its preparation method, relating to the field of steel material technology. The high-strength corrosion-resistant pipeline steel component prepared by this invention comprises, from the inside out, a pipeline steel component base layer and an anti-corrosion layer. The high-strength corrosion-resistant pipeline steel component is prepared by first pre-treating the pipeline steel component base layer with a temperature rise, then applying tension to the pre-treated base layer using a tensioner, followed by coating the outer surface of the pre-treated base layer with an anti-corrosion material, and then continuing to heat and cool under a nitrogen-containing gas atmosphere. The pipeline steel component base layer, by mass fraction, comprises the following components: 0.09–0.11% C, 11–14% Cr, 0.4–1% Si, 0–0.03% S, 0–0.03% P, 0.03–0.08% Ti, with the remainder being Fe. The anti-corrosion material includes ammonium borate, polyacrylonitrile, aluminum oxalate, and ammonium polyvanadate. The high-strength corrosion-resistant pipeline steel component prepared by this invention exhibits high strength and good corrosion resistance.

The application relates to the technical field of semiconductor manufacturing, in particular to a water-soluble protective film and a preparation method and application thereof; the water-soluble protective film is prepared from raw materials comprising the following components: 2wt%-8wt% of a film forming agent; 0.05wt%-0.5wt% of a fluoride removing agent; 0.05wt%-0.5wt% of a buffer; and the balance of a solvent; the fluoride removing agent comprises ammonium tetraborate and / or ammonium gluconate. Compared with the prior art, the water-soluble protective film is prepared from raw materials comprising specific components, the components realize good mutual interaction under specific proportioning conditions, the water-soluble protective film can complex and absorb Al surface F ‑ under certain conditions, and can physically isolate water vapor, so that corrosion of the Al surface is effectively avoided; meanwhile, the water-soluble protective film is soluble in water and can be removed through water washing operation, the operation is simple, and the cost is low.

The invention discloses a method for preparing a porous carbon material by taking waste plastic as a carbon source in an air atmosphere and application. The method comprises the following steps: uniformly mixing ammonium pentaborate tetrahydrate and a carbon source to obtain a pyrolysis precursor; covering ammonium pentaborate tetrahydrate above the pyrolysis precursor, and vibrating to enable the pyrolysis precursor to be more compact; transferring the pyrolysis precursor covered with ammonium pentaborate tetrahydrate into a tubular furnace, carbonizing in an air atmosphere, and naturally cooling to room temperature to obtain a pyrolysis product; adding water into the pyrolysis product, stirring, washing with water, filtering to respectively obtain filtrate and filter residues, and drying the filter residues to obtain the B / N co-doped porous carbon material. Compared with a traditional method, inert atmosphere protection is not needed, the cost and resource consumption are remarkably reduced, and the method has universality, environment friendliness, economical efficiency and high efficiency. The preparation process is simple, the period is short, the yield is high, the method is suitable for industrial large-scale production, and a new way is provided for precisely synthesizing the functional porous carbon material through air pyrolysis under mild conditions and expanding the application field of the functional porous carbon material.

The invention relates to the technical field of semiconductor manufacturing, in particular to a water-soluble protective film and a preparation method and application thereof. The water-soluble protective film is prepared from the following raw materials: 2-8 wt% of a film-forming agent; 0.05 wt%-0.5 wt% of a fluorine removal agent; 0.05 wt% to 0.5 wt% of a buffering agent; and the balance of a solvent; the fluorine removing agent comprises ammonium tetraborate and / or ammonium gluconate. Compared with the prior art, the water-soluble protective film provided by the invention is prepared from the raw materials comprising specific content components, all the components realize good overall interaction under a specific proportioning condition, and the formed water-soluble protective film can complex and absorb F <-> on the surface of Al, and can physically isolate water vapor under a certain condition, so that the water-soluble protective film has the advantages that the water-soluble protective film has good corrosion resistance and corrosion resistance; therefore, the Al surface is effectively prevented from being corroded; meanwhile, the water-soluble protective film is soluble in water and can be removed through water washing operation, operation is easy, and cost is low.

The application discloses a kind of composite oxygen barrier coating and preparation method thereof, comprising the following steps: cobalt salt and 2-methylimidazole are dissolved in solvent to form first mixed solution, after substrate is immersed in first mixed solution, the substrate removed is sequentially washed, dried, calcined and cooled, and transition layer is formed on the surface of substrate, to obtain first intermediate;Carboxylic acid and ammonium borate are dissolved in water to form second mixed solution, and second mixed solution is heated, and the above-mentioned first intermediate is immersed in heated second mixed solution, and then the first intermediate removed is heated in sections, to obtain second intermediate;Phosphoric acid and aluminum dihydrogen phosphate are dissolved in water to form third mixed solution, and the above-mentioned second intermediate is immersed in third mixed solution, and then the second intermediate removed is sequentially dried, calcined and cooled, to form oxygen barrier layer on the surface of transition layer, to obtain the required composite oxygen barrier coating.

The application provides an outdoor intumescent steel structure fireproof coating and a preparation method thereof, and relates to the field of fireproof coatings.The fireproof coating comprises a matrix and a curing agent, and the matrix raw materials are bisphenol A type epoxy resin, low-viscosity aromatic epoxy resin, aerogel, ammonium polyphosphate, ammonium pentaborate, pretreated expanded graphite, composite filler, polyamide wax, dispersant and reactive diluent; and the curing agent raw materials are polyamide resin, low-viscosity aromatic epoxy resin, reactive diluent, melamine, carbon black powder, glass fiber, hydrogenated castor oil and attapulgite.The fireproof coating can form a uniform and stable coating layer, has strong adhesion to the steel structure, is resistant to high temperature and humid heat, effectively avoids problems such as peeling, bulging and cracking during use, and has excellent freeze-thaw resistance, acid resistance, alkali resistance, salt mist resistance and ultraviolet radiation resistance, so that the fireproof performance of the coating does not attenuate during long-term outdoor use, and the service life of the coating is effectively prolonged.

A compound may be useful as a co-catalyst for polymerizing olefin, diene, and acetylene. A fluorine-containing alkylammonium borate compound of formula (1):wherein each symbol is as defined in the specification, may be highly active and useful as a co-catalyst used for the polymerization reactions of olefin, diene, and acetylene, compositions containing same. Production methods of such a fluorine-containing alkylammonium borate compound are also provided.

The invention provides a compound ammonium fluoroborate, an ammonium fluoroborate nonlinear optical crystal and a preparation method and application thereof. The chemical formula of the compound is (NH4) 2B2OF6. 2H2O, the molecular weight of the compound is 223.72, the chemical formula of the crystal is (NH4) 2B2OF6. 2H2O, the molecular weight of the crystal is 223.72, the crystal belongs to an orthorhombic system structure, the space group of the crystal form is Cmc21, and the cell parameters are that a is equal to 9.00 + / -0.2, b is equal to 9.97 + / -0.2, c is equal to 9.00 + / -0.2, alpha is equal to 90 degrees, beta is equal to 90 degrees, gamma is equal to 90 degrees, and Z is equal to 4. The crystal is grown by adopting a room temperature solution method and a hydrothermal method, the crystal has a relatively large frequency multiplication coefficient and nonlinear optics, the ultraviolet cut-off edge is lower than 200nm, and the crystal shows relatively good comprehensive performance. In addition, the nonlinear optical crystal also has the advantages of wide light transmission wave band, stable physical and chemical properties, high mechanical hardness, difficulty in fragmentation and deliquescence, easiness in cutting, polishing, processing and storage and the like.