14results about How to "Dilute oxygen concentration" patented technology

The invention discloses a UV photocureable coating as well as a preparation method and application thereof in automobiles, and relates to the technical field of coatings. When the UV photocureable coating is prepared, 4-aminophenylboronic acid is dehydrated to prepare aminated boron oxygen six-ring; carrying out a reaction on the aminated boroxane and diallyl chlorophosphate to prepare functionalized boroxane; the preparation method comprises the following steps: sequentially reacting graphene oxide with 3-chloropropyltriethoxysilane and 1, 3-diallyl-1, 3, 5-triazine-2, 4, 6-triketone, so as to obtain modified graphene; the preparation method comprises the following steps: reacting epoxy resin with 2-butenal thiosemicarbazone to prepare modified epoxy resin; and uniformly mixing the modified epoxy resin, the epoxy acrylate resin, the modified graphene, the functionalized boroxane, the 1, 6-hexanediol diacrylate and the 1-hydroxycyclohexyl phenyl ketone, so as to obtain the UV photocureable coating. The UV photocureable coating prepared by the invention has excellent flame retardant, self-repairing and mechanical properties.

The invention relates to an anti-yellowing automobile composite film and a preparation method thereof, and belongs to the technical field of high polymer materials. The yellow-resistant automobile composite film is prepared from the following components in parts by weight: 60 to 70 parts of PVC (Polyvinyl Chloride) master batch, 10 to 20 parts of TPU (Thermoplastic Polyurethane) master batch, 1 to 2 parts of plasticizer, 0.5 to 0.8 part of flatting agent, 0.1 to 2 parts of yellowing-resistant modifier and 0.1 to 2 parts of modified flame retardant, sym-triazine cyanuric chloride and a benzotriazole intermediate in the anti-yellowing modifier absorb ultraviolet rays and reduce yellowing of the ultraviolet rays on the composite material, and maleimide groups, maleic anhydride and isocyanurate rings for increasing the crosslinking density cooperate with one another, so that the heat resistance of the material is improved, and the yellowing is reduced; phosphorus and nitrogen main chains of phosphonitrilic chloride trimer in the modified flame retardant have a conjugation effect, so that a protective film is formed, oxygen is isolated, and the phosphonitrilic chloride trimer and nitrogen are synergistically flame-retardant; the anti-yellowing automobile composite film prepared by the invention not only has excellent ultraviolet absorption performance, heat resistance and anti-yellowing effects, but also has a good flame retardant effect.

The invention relates to the technical field of rubber, and discloses low-temperature-resistant rare earth butadiene rubber and a preparation method thereof. Phosphorus-containing quaternary ammonium salt modified polyurethane, polyethoxylene ether modified phenolic resin, rare earth butadiene rubber and sulfur are added into an internal mixer to be mixed and then vulcanized, and the low-temperature-resistant rare earth butadiene rubber is obtained. In the phosphorus-containing quaternary ammonium salt modified polyurethane, silicon-oxygen bonds enable the rubber to maintain stability at low temperature, so that the low-temperature-resistant effect of the rubber is improved; polyurethane and a rubber molecular chain form an interpenetrating polymer network, so that the mechanical property of the rubber is improved; due to the soft segment chain of polyurethane, the rubber has better toughness at low temperature, and the low temperature resistance of the rubber is improved; an ether bond in polyoxyethylene ether has flexibility and stability, so that the rubber is not easy to crystallize or cure at low temperature; phosphorus, silicon and sulfur elements are used together to generate a synergistic flame-retardant effect, so that the flame retardance of the rubber is improved; the phenolic resin plays a reinforcing role in the rubber, so that the mechanical property of the rubber is improved.

The invention relates to the technical field of weak current engineering safety alarm devices, in particular to a weak current engineering construction safety alarm device which comprises a mounting base, a pair of sliding rod air cylinders are fixedly connected to the bottom end of the mounting base, a mounting frame is fixedly connected between the output ends of the sliding rod air cylinders, and a controller body is fixedly connected to the bottom end of the mounting frame. And the front end of the controller body is fixedly connected with a smoke sensor. Through the extrusion fire extinguishing mechanism and the magnetic suction exhaust mechanism, when fire spreads to the controller body, dry ice powder is released to sublimate into carbon dioxide, heat of surrounding flames is absorbed, the temperature of the flames is reduced, the temperature of comburent is promoted to be reduced to be below an ignition point, meanwhile, the carbon dioxide can isolate oxygen, and the fire extinguishing effect is improved. The oxygen concentration in the air is diluted, and fire spreading is stopped, so that the fire extinguishing effect is achieved, the controller body is prevented from being damaged by the fire, and the protection effect is improved.

The application belongs to the field of high polymer materials, and particularly discloses a modified basic magnesium carbonate and a PA12 composite material and a preparation method thereof.The preparation method of the modified basic magnesium carbonate comprises the following steps: adding sodium carbonate and magnesium chloride into a sodium hydroxide solution to perform a water bath reaction to obtain the basic magnesium carbonate; adding the basic magnesium carbonate and acrylic acid into deionized water to perform a water bath reaction to obtain acrylic acid modified basic magnesium carbonate; and adding the acrylic acid modified basic magnesium carbonate, glycidyl methacrylate and an initiator into an organic solvent aqueous solution to perform a water bath reaction to obtain the modified basic magnesium carbonate.The modified basic magnesium carbonate prepared by the application can decompose and absorb heat at high temperature, release water vapor and carbon dioxide and other non-combustible gases, dilute the oxygen concentration on the surface of the combustion object, and reduce the temperature of the combustion area, so as to play a role in flame retardation.In addition, the magnesium oxide produced by decomposition covers the surface of the material to form a protective layer, and further prevents the combustion.

The invention discloses a dimethyl polyitaconate explosion suppression material, and belongs to the technical field of explosion suppressant preparation. The preparation method of the polyitaconic acid dimethyl ester comprises the following steps: uniformly mixing a dispersing agent, a surfactant and a solvent, then adding dimethyl itaconate (DMI) and an initiator, uniformly mixing, heating to react, and purifying to obtain the polyitaconic acid dimethyl ester. The polyitaconic acid dimethyl ester disclosed by the invention can play a physical inhibition role and a chemical inhibition role on combustion of dust, and has a very good explosion suppression effect.

The invention belongs to the field of coal mine goaf fire prevention and extinguishment, and relates to a fire prevention and extinguishment method for inhibiting goaf coal spontaneous combustion through porous material temperature control inert gas desorption, and the method comprises the following steps: step a, putting a porous material into a container, and injecting inert gas into the container by pressure to enable the porous material to reach adsorption equilibrium; the pressure in the container is the optimal adsorption equilibrium pressure of the porous material; b, the porous material reaching the adsorption equilibrium pressure is put into the goaf of the coal mine; c, after the temperature in the goaf rises, the inert gas in the porous material is heated, desorbed and released into the goaf. The stable chemical property of the porous material is utilized, long-term storage of inert gas under the normal temperature condition and controllable release under the temperature rising condition can be achieved, the accuracy and economical efficiency of a conventional inert gas fire preventing and extinguishing technology are improved, and spontaneous combustion of coal in the goaf of a coal mine can be effectively restrained.

The utility model discloses an integrated large-span assembly type exquisite steel curtain wall structure, concretely relates to the exquisite steel curtain wall structure technical field, including framework component, fixed component, curtain wall component and second connecting component, the side of framework component is equipped with fixed component, and the side away from fixed component of framework component places curtain wall component, and the top of curtain wall component is equipped with second connecting component, and it can carry out real -time detection to the prestress that second fixed bolt exerts to second locating block surface through placing resistance voltage -transforming piece below second connecting component to the value of detection is passed to control panel, and control panel will analyze the prestress that second fixed bolt exerts to second locating block surface, when the prestress is less than certain critical value, and control panel will be in time to the feedback of construction personnel, and lets construction personnel to carry out the rush repair to it.

The present invention relates to the technical field of acrylic resins, and discloses a preparation method of a high-hardness cross-linked modified hydroxy acrylic resin; comprising 100 parts by weight of hydroxy acrylic resin, 1-10 parts by weight of hydroxy aramid fiber, 0.3-0.6 parts by weight of defoamer, 0.3-0.5 parts of wetting and leveling agent, and 2-8 parts by weight of isocyanate trimer. During the curing process, the diisocyanate trimer cross-linking agent reacts with the hydroxyl group of the aramid fiber and the hydroxyl group of the acrylic resin, so that the aramid fiber and the acrylic resin undergo a chemical cross-linking reaction, the interface performance and compatibility between the aramid fiber and the hydroxy acrylic resin are improved, the wear mass loss of the acrylic resin paint film is reduced, the hardness, tensile properties and limiting oxygen index are improved, and the mechanical properties and flame retardant properties are better.

The present application relates to the technical field of paint, and especially relates to a weather-resistant one-coat paint and a preparation method thereof. The paint comprises component A and component B; the mass ratio of the component A to the component B is (25-30):3; according to weight parts, the component A comprises the following raw materials: 20-30 parts of hydroxyl acrylic acid resin, 10-20 parts of organic solvent, 25-35 parts of pigment, 5-15 parts of flame retardant, 1-5 parts of modified graphene and 1-4 parts of additive; and the component B is a solution of aliphatic polyisocyanate. The paint has excellent bacteriostasis, flame retardation, weather resistance and corrosion resistance.

This invention provides a method for preparing anti-deformation, flame-retardant, and smoke-suppressing glued laminated timber. The method involves mixing γ-methacryloyloxypropyl, o-phenylenediamine, and deionized water in a mass ratio of 1:(2-4.5):(5-7), followed by further mixing with polyvinyl acetate emulsion in a mass ratio of (1-2):10 to obtain a flame-retardant polyvinyl acetate emulsion. Multiple dried solid wood veneers are immersed in a constant-temperature water bath at 30-40°C. After removal, they are placed in an impregnation tank, and a copolymer AA / AMPS aqueous solution with a mass concentration of 40-45% and a degree of polymerization of 40-60 is injected under negative pressure to completely submerge the solid wood veneers. Pressure is then applied and maintained for 3-5 hours. After removal, cleaning, and drying at 70-80°C, the treated veneer surfaces are coated with the flame-retardant polyvinyl acetate emulsion and assembled. Cold pressing and hot pressing are then performed to obtain glued laminated timber with good anti-deformation, flame-retardant, and smoke-suppressing properties.

The application discloses a kind of high-strength waterproof board and preparation method thereof, it is related to plate technical field.The preparation method of the application includes the following steps: sequentially stack 1 steel plate, 2 base plates, 1 fingerprint-resistant polymer film on 1 fingerprint-resistant polymer film, then heat pressing solidification, after cooling, plate is taken out, and high-strength waterproof board is obtained;Wherein, base plate is prepared from modified kraft paper and modified color paper.The water resistance, fire resistance and bonding strength of the plate are effectively improved by modifying kraft paper with modified phenolic resin, hydrophilic silicon dioxide and other components;The bonding strength, water resistance and fire resistance of the plate are further improved by modifying color paper with melamine, vanillin, flame retardant DOPO, 3,4-dihydroxybenzaldehyde and other components.Therefore, the application has a more extensive application prospect.

The invention relates to a flame-retardant polyurethane foam material containing fire-extinguishing microcapsules and a preparation method of the flame-retardant polyurethane foam material, and belongs to the technical field of fire-extinguishing materials. The method comprises the following steps: uniformly mixing perfluorohexanone, an oil-phase substance, polyol and a phase solvent to obtain an oil-phase mixture; adding the oil-phase mixture into an aqueous solution of an emulsifier, and uniformly mixing to obtain an emulsion; adding an aliphatic amine compound into the emulsion to initiate a polymerization reaction, and obtaining a mixed solution containing an initial fire extinguishing microcapsule after the reaction is completed; carrying out surface modification on the initial fire-extinguishing microcapsules to obtain the fire-extinguishing microcapsules coated with calcium carbonate particles on the surfaces; uniformly mixing the fire-extinguishing microcapsules, a polyol component and isocyanate, and performing condensation reaction to obtain the flame-retardant polyurethane foam material containing the fire-extinguishing microcapsules. According to the invention, the polyurethane foam composite material with flame-retardant and fire-extinguishing functions is prepared.

This invention provides a forest flame-retardant suspension, its preparation method, and its application, comprising the following raw materials by weight percentage: 7-16% flame retardant, 0.7-1.6% char-forming thickener, 1.5-6% film-forming anchoring agent, 0.8-1.4% performance enhancer, 0.1-0.3% chelating dispersant, and the balance being water; wherein the flame retardant is type II ammonium polyphosphate with a degree of polymerization >1000, the char-forming thickener is sodium alginate and xanthan gum, and the film-forming anchoring agent is VAE emulsion. This invention utilizes the hydrophobicity of APPII to solve the problem of easy erosion by dew or rainwater. At the same time, it utilizes the polyphosphoric acid and ammonia produced by the thermal decomposition of APPII. The polyphosphoric acid catalyzes the formation of char from sodium alginate and vegetation cellulose, forming a dense protective layer. This protective layer isolates the transfer of heat and oxygen, cutting off the combustion chain at the source and achieving high flame retardant efficiency. The ammonia can dilute the oxygen concentration in the flame area, playing a gas-phase flame retardant role. The ammonia can also be absorbed or degraded by plants as nitrogen fertilizer, realizing the synergy between forest fire prevention and ecological restoration.