31 results about "Liquid fluorine" patented technology

The invention relates to the technical field of air conditioner heat recovery, and particularly discloses a distributed stepless adjustment condensation heat recovery system and a working method.The distributed stepless adjustment condensation heat recovery system comprises a heat recovery type outdoor unit and a heat recovery module, and a filter, a heat pump first heat exchanger and an air conditioner fan are installed in a box body of an air handling unit; a compressor, a four-way reversing valve, a three-way reversing valve and a second heat pump heat exchanger are installed in a box body of the heat recovery type outdoor unit. A first heat pump heat exchanger is connected with the four-way reversing valve and the second heat pump heat exchanger through gas-liquid fluorine pipes. The air conditioner fan is connected with the heat recovery modules, a heat recovery coil pipe and a double-channel electric air valve are installed in a box body of each heat recovery module, the heat recovery coil pipe is connected with a four-way reversing valve and a three-way reversing valve through a heat recovery fluorine pipe, and the heat recovery coil pipe, a first heat pump heat exchanger and a second heat pump heat exchanger form a closed circulation system; according to the invention, independent and accurate control and'stepless' regulation of temperature and humidity are realized, and remarkable energy comprehensive utilization and energy-saving benefits are achieved.

This invention belongs to the field of fire extinguishing materials and their preparation technology, and provides a fire extinguishing microcapsule and its microfluidic controllable preparation method. The preparation method is characterized by the following steps: (1) preparing fluids of each phase, (2) preparing a dual emulsion using a microfluidic device, (3) collecting and sealing the dual emulsion in a collection container, controlling the axis of the collection container to be horizontal, and controlling the collection container to rotate around its axis for 1 to 15 minutes, applying light to solidify the outer shell of the dual emulsion droplets while maintaining the rotation of the collection container, cleaning, and drying to obtain the final product. The fire extinguishing microcapsule prepared by this method consists of an outer shell and a liquid fluorine-containing fire extinguishing agent encapsulated within the outer shell. The outer shell of the fire extinguishing microcapsule has a uniform thickness, and the eccentricity between the outer shell and the core is less than 0.1. The method of this invention can achieve precise customization of fire extinguishing microcapsules according to the differentiated fire characteristics of different application scenarios, and can improve the concentricity between the core and the outer shell of existing fire extinguishing microcapsules.

The present application relates to a kind of methods and devices for preparing anhydrous hydrogen fluoride and sulfuric acid.The method comprises the following steps: removing impurities from industrial waste fluorosulfuric acid, mixing it with concentrated sulfuric acid to form a pretreated mixture; using microwave heating to rapidly heat the reactor, a static bed is arranged in the reactor; the pretreated mixture is passed into the upper surface of the static bed in the preheated reactor, the pretreated mixture is heated by microwave, and hydrogen fluoride and sulfur trioxide gas are generated by the decomposition of the pretreated mixture; hydrogen fluoride and sulfur trioxide are mixed and passed into low-temperature concentrated sulfuric acid to absorb sulfur trioxide gas; then passed into low-temperature condensing equipment, and liquid hydrogen fluoride is collected; the liquid hydrogen fluoride is purified by rectification; and the concentrated sulfuric acid that absorbs sulfur trioxide is evaporated and concentrated.The advantages are: using a "static bed + material" double-wave absorption system, achieving more uniform and stable temperature field distribution in the liquid layer of industrial waste fluorosulfuric acid, making the pyrolysis of industrial waste fluorosulfuric acid more efficient and stable.

The utility model discloses a liquid cooling system and a data center, the liquid cooling system comprises a condensing device, a heat exchange device, a first pipeline and a second pipeline, an output port of the condensing device is communicated with an input port of the first pipeline, an output port of the first pipeline is communicated with a primary side input port of the heat exchange device, and an output port of the second pipeline is communicated with a secondary side input port of the heat exchange device; a primary side output port of the heat exchange device is communicated with an input port of the second pipeline, an output port of the second pipeline is communicated with an input port of the condensing device, the first pipeline and the second pipeline are used for circulating fluorine, and the condensing device is used for converting input gaseous fluorine into liquid fluorine. According to the scheme, compared with the scheme that water serves as the cooling medium of the primary side, the anti-freezing problem during low-temperature use can be avoided.

The application relates to the technical field of fluorine materials, and discloses a liquid fluorine elastomer as well as a preparation method and application thereof. The liquid fluorine elastomer is obtained by mixing and reacting a fluorine-containing elastomer solution, magnesium oxide and an alcohol amine; wherein the fluorine-containing elastomer is free of side hydroxyl groups. The preparation method has the characteristics of less by-products, simplicity, controllability, high yield and the like. The high-functionality low-molecular-weight liquid fluorine elastomer of the application contains side hydroxyl groups, and the preferred example can also contain terminal carboxyl groups or terminal hydroxyl groups, has high functionality and good reactivity, and is crosslinked with a polyisocyanate compound to be solidified. The solidified product has excellent mechanical properties and chemical medium resistance, and can be used to prepare special adhesives, sealants and coatings.

The invention belongs to the field of biological materials, and particularly relates to an ultrasonic responsive oxygen-carrying and traditional Chinese medicine microcapsule and a preparation method and application thereof in treatment of infected wounds, two glass tubes with different inner diameters are coaxially sleeved and fixed, the glass tube with the larger inner diameter is used as an outer phase channel, and the glass tube with the smaller inner diameter is used as an inner phase channel; the preparation method comprises the following steps: dissolving sodium alginate and curcumin into deionized water to prepare a mixed pre-gel solution; oxygen is introduced into the liquid fluorocarbon, and oxygen-enriched fluorocarbon liquid is obtained after treatment; the prepared mixed pre-gel solution and the oxygen-enriched fluorocarbon liquid are simultaneously introduced into the external phase channel and the internal phase channel respectively, electric field force is applied to outlets of the channels, and the mixed pre-gel solution and the oxygen-enriched fluorocarbon liquid fall into a collection liquid after being subjected to electronic injection to obtain the oxygen-carrying and traditional Chinese medicine microcapsule. The loaded traditional Chinese medicine curcumin and oxygen dissolved in the fluorocarbon achieve simultaneous delivery of traditional Chinese medicine and oxygen, and controllable oxygen release and sonodynamic therapy can be achieved.

The invention discloses a preparation method of a high-transparency fluorosilicone resin compound and a precise film thereof, and relates to the technical field of polymer composites.The high-transparency fluorosilicone resin compound is specifically prepared from liquid fluorine-containing hydrogen-containing silicone resin and liquid fluorine-containing vinyl silicone resin as bases, and fluorovinyl silicone oil, inhibitor 1-ethynyl-1-cyclohexanol and a platinum catalyst as auxiliary materials. The preparation method comprises the following steps: preparing a high-transparency fluorosilicon resin compound, coating a substrate with the high-transparency fluorosilicon resin compound by using a precision coating machine, and carrying out thermocuring to obtain the high-transparency fluorosilicon resin compound precision film which has good oil resistance and can still keep good physical properties at-65 DEG C. The production method of the high-transparency fluorosilicone resin compound precise film is the same as the production method of the high-transparency silicone rubber precise film in the prior art, a production line for producing the high-transparency silicone rubber precise film can be directly used for production, an additional production line is not needed, and the production cost is reduced.

The invention provides a low-temperature modifier, a preparation method thereof and application of the low-temperature modifier in hydrogen energy sealing fluororubber, and belongs to the field of chemical materials. The low-temperature modifier is prepared by reacting carboxyl type liquid fluorine rubber with an epoxy group-containing reactive modifier, and is used for preparing fluorine rubber. The low-temperature modifier provided by the invention can obviously improve the anti-knock performance and low-temperature resistance of the fluororubber, and the obtained fluororubber can maintain excellent elasticity and sealing performance at-40 DEG C; meanwhile, no obvious negative influence is caused on the vulcanization performance, the hardness and the basic mechanical performance of the fluororubber, the fluororubber with high hardness, excellent mechanical performance, excellent anti-knock performance and excellent low-temperature resistance is obtained, the use requirement at the low temperature of minus 40 DEG C is met, and the fluororubber adapts to the 35 MPa high-pressure hydrogen energy sealing working condition; and the application of hydrogen energy equipment in wider climate areas is promoted.

This invention discloses a method for preparing an oil-gas separation membrane for online transformer testing, comprising: Step 1, spreading liquid fluorosilicone rubber on a flat plate and curing it to form a thin film; Step 2, mixing and dispersing Hyflon AD60 with a perfluoropolyether thermally conductive liquid, adding α-phase nano-alumina powder, and dispersing it evenly to obtain a casting solution; Step 3, coating the casting solution onto the thin film, allowing it to stand, covering it with a pressure plate, and heating it to 180–220°C in a drying oven for 3–10 hours; Step 4, allowing it to stand under high pressure for 24–48 hours, then placing it again in a preheated drying oven for 6–12 hours, and cooling it to obtain the final product. The preparation method of this invention is mild, resulting in an oil-gas separation membrane with high mechanical strength and a short oil-gas separation time. This invention discloses an oil-gas separation membrane with a short oil-gas separation time, which can significantly improve the efficiency of online transformer testing and shorten the testing cycle.

The invention belongs to the technical field of safety, and relates to a drainage system and method for liquid high-boiling-point volatile fluoride. The invention provides a drainage and subpackaging system and method suitable for liquid high-boiling-point volatile fluoride. The drainage and subpackaging system comprises a liquefaction container, a product container, a sampling container, a subpackaging pipeline and a sampling pipeline. On the premise of not changing the plant system of the existing production unit, the liquid fluoride can be kept in a stable liquid phase state in the split charging and sampling processes by improving a drainage split charging method, namely reducing the sudden pressure drop of the liquid fluoride in the split charging and drainage process and filling a drainage pipeline with the liquid fluoride section by section; the gasification phenomenon in the split charging and sampling process of the liquid fluoride is reduced, and the intrinsic safety degree of the liquid high-boiling-point volatile fluoride in the split charging and sampling process is improved.

The invention discloses a battery monomer, a liquid fluorine-containing polymer, a preparation method and application of the liquid fluorine-containing polymer, and an electric device. The battery monomer comprises an electrode assembly and an electrolyte, and the electrolyte comprises an electrolyte, an organic solvent and a liquid fluorine-containing polymer; the liquid fluorine-containing polymer has a hyperbranched structure, and the number-average molecular weight of the liquid fluorine-containing polymer is 100 to 230 kDa; based on the electrolyte, the mass content of the liquid fluorine-containing polymer is 2%-20%. According to the embodiment of the invention, the thermal stability, the chemical stability and the ionic conductivity of the electrolyte can be improved, and the reliability and the charge-discharge performance of the battery monomer can be improved when the electrolyte is used for the battery monomer.

The invention provides an efficient liquid fluorine removal agent based on a terpolymer, which is formed by copolymerizing crystalline aluminum chloride (AlCl3. 6H2O), lanthanum chloride heptahydrate (LaCl3. 7H2O) and polyvinyl alcohol (PVA) in water, and comprises the following components in percentage by mass: 30 to 60 percent of crystalline aluminum chloride, 0.5 to 5 percent of lanthanum chloride heptahydrate, 0.1 to 2 percent of polyvinyl alcohol and the balance of water. In the preparation method disclosed by the invention, ordered complexing of Al < 3 + > and La < 3 + > is realized through pH gradient regulation and control, and structural defects are avoided. According to the invention, urea is added to assist mixing, and the urea can inhibit PVA molecular chain entanglement, improve the combination uniformity and complexing efficiency of PVA chains and metal ions, and reduce local aggregation. The ternary polymerization liquid fluorine removal agent provided by the invention is simple in preparation process, convenient to add, economical and efficient, and can be widely applied to advanced treatment of various low-concentration fluorine-containing wastewater.

The invention particularly relates to a nitrogen trifluoride raw material electrolyte preparation device and method.The device comprises an HF storage tank, an ammonia conveying unit, an electrolyte preparation unit and an electrolyte storage tank, the HF storage tank and the ammonia conveying unit communicate with the electrolyte preparation unit through pipelines, and the electrolyte preparation unit communicates with the electrolyte storage unit through a pipeline; the ammonia gas conveying unit comprises a liquid ammonia storage tank, a liquid ammonia conveying pump, an ammonia vaporizer and an adsorption tower which are sequentially communicated along the material flow direction; and the electrolyte preparation unit comprises a mixing reaction kettle and an electrolyte heat exchanger. According to the method, liquid hydrogen fluoride and liquid ammonia are pumped from a storage tank to a mixing reaction kettle, hydrogen fluoride reacts with ammonia gas to generate a molten electrolyte of NH4HF2 and HF, the electrolyte is conveyed through a circulating pump after the reaction, one part of the electrolyte is stored in an electrolyte storage tank, and the other part of the electrolyte is cooled by a heat exchanger and then returns to the reaction kettle to maintain the temperature stable. The method has the advantages of energy conservation, high product purity, high yield and the like.

The invention relates to the technical field of hydrofluoric acid processing, in particular to an electronic-grade hydrofluoric acid processing system which comprises a raw material tank for storing liquid hydrogen fluoride, a dilute hydrofluoric acid tank for storing dilute hydrofluoric acid, a pure water tank for storing pure water and a finished product tank for storing finished hydrofluoric acid. A heat exchange module for heating liquid hydrogen fluoride into gaseous hydrogen fluoride is mounted at the output end of the raw material tank through a pipeline, a purification tower for removing impurities in the gaseous hydrogen fluoride is mounted at the gas output end of the heat exchange module through a pipeline, and a gas storage tank is mounted at the gas outlet end of the purification tower through a pipeline; an absorption tower is mounted at the output end of the gas storage tank through a pipeline; an absorption kettle is mounted at the liquid outlet end of the absorption tower; after the hydrogen fluoride liquid is gasified, impurities in gaseous hydrogen fluoride are removed to obtain high-purity gaseous hydrogen fluoride, and then hydrofluoric acid with the concentration gradually increased is generated in combination with pure water until the electronic-grade hydrofluoric acid conforming to process indexes is obtained.

The invention relates to the technical field of cable materials, in particular to a high-tear-resistance cable material and a preparation method thereof. The material takes a hydrogenated styrene-butadiene-styrene block copolymer as a matrix, and comprises a carboxyl-terminated liquid fluorine rubber microcapsule and a polypyrrole modified layered double-metal hydroxide nanosheet. The preparation method comprises the following steps: preparing by a process comprising dynamic vulcanization, releasing a microcapsule core material, performing interface interaction with the nanosheet, and constructing a dynamic sacrifice network and a rigid nano-skeleton interpenetrating structure in a matrix in situ. The material has ultrahigh tear strength (greater than or equal to 78kN / m) and high elongation at break (greater than or equal to 400%), and a sensitive conductive network formed by polypyrrole on the surface of the nanosheet is utilized to realize an electrical early warning function of early mechanical damage. Meanwhile, the material keeps excellent flame retardance, insulativity, heat resistance and processability, and is suitable for cable sheaths with high requirements on reliability and intelligence.

The application discloses a continuous production method of phosphorus pentafluoride, belongs to the technical field of phosphorus pentafluoride production, and adopts diaphosphorus pentoxide and anhydrous hydrogen fluoride to synthesize a hexafluorophosphoric acid aqueous solution; when starting for the first time, the anhydrous hydrogen fluoride solution is used as a reaction substrate; when normally operating, the hexafluorophosphoric acid aqueous solution is used as the reaction substrate; by continuously feeding the diaphosphorus pentoxide and liquid hydrogen fluoride, and continuously discharging the hexafluorophosphoric acid aqueous solution, the continuous synthesis of the hexafluorophosphoric acid is realized, and a prerequisite for the continuous synthesis of the phosphorus pentafluoride is provided. The reaction time for synthesizing the hexafluorophosphoric acid is greatly reduced, the liquid reaction system has high heat transfer efficiency, temperature control is easier, the strength requirement of a stirrer is greatly reduced, and the method has extremely high engineering value.

The present invention provides a phosphorus pentafluoride purification method, which comprises: introducing a first mixed gas containing phosphorus pentafluoride and impurities into liquid hydrogen fluoride at a flow rate v, and washing at a normal pressure and a temperature T to obtain a second mixed gas containing phosphorus pentafluoride and hydrogen fluoride, wherein the impurities comprise phosphorus oxyfluoride, T is less than or equal to 15 DEG C, and v is more than or equal to 2mL / min and less than or equal to 10mL / min; and separating the second mixed gas to obtain phosphorus pentafluoride. According to the method, impurities in the phosphorus pentafluoride gas can be effectively removed, and the purity and the yield of phosphorus pentafluoride are improved.

To provide a composite material excellent in strength, chemical resistance, and solvent resistance, and a method capable of relatively easily and industrially advantageously producing the composite material.SOLUTION: A composite material formed by integrating a cured product of a curable liquid fluorine-containing composition containing a curable liquid fluorine compound and a fiber substrate. A method for producing a composite material including the steps of uniformly impregnating a fiber substrate with a curable liquid fluorine-containing composition, degassing the fiber substrate uniformly impregnated with the curable liquid fluorine-containing composition, and curing the curable liquid fluorine-containing composition uniformly impregnated in the fiber substrate after degassing.SELECTED DRAWING: None

The invention relates to the technical field of rare earth hydrometallurgy and rare earth smelting separation, in particular to a rare earth feed liquid defluorination process based on neutralized carbonate adsorption synergistic circulation. The process comprises the following steps: S1, pH neutralization adjustment: adding an alkaline substance into a fluorine-containing rare earth solution to carry out a neutralization reaction, and adjusting the pH of the system to a weakly acidic range; s2, carbonate defluorination treatment: adding a rare earth carbonate compound into the fluorine-containing rare earth solution, and carrying out defluorination treatment to obtain a treated mixed solution; s3, solid-liquid separation: carrying out solid-liquid separation on the treated mixed liquid to obtain low-fluorine rare earth purified liquid and solid-phase defluorination residues; s4, circulating defluorination: using the solid-phase defluorination slag as a defluorination material to be used in a new round of defluorination treatment of the fluorine-containing rare earth solution; and S5, rare earth recovery: carrying out acid dissolution and precipitation treatment on the solid-phase defluorination slag which achieves adsorption saturation after recycling to obtain a pure rare earth solution. Rare earth is efficiently recycled and returned to the main production process, and the comprehensive utilization rate of resources is increased.

The present application provides a purification method for phosphorus pentafluoride. The purification method for phosphorus pentafluoride comprises the following steps: introducing a first mixed gas containing phosphorus pentafluoride and impurities into liquid hydrogen fluoride at a velocity v; carrying out washing at normal pressure and a temperature T to obtain a second mixed gas containing phosphorus pentafluoride and hydrogen fluoride, wherein the impurities include phosphoryl fluoride, T≤15°C, and 2 mL / min≤v≤10 mL / min; and separating from the second mixed gas to obtain phosphorus pentafluoride. The present application can effectively remove impurities in phosphorus pentafluoride gas, thereby improving the purity and yield of phosphorus pentafluoride.

The invention discloses a fluorine-containing waste liquid villiaumite recycling device and method, and relates to the technical field of waste liquid treatment.The fluorine-containing waste liquid villiaumite recycling device comprises a protective shell, a water inlet pipe, a water outlet pipe, a recycling pipe and a reaction tank, the reaction tank is installed in the protective shell, a middle shaft pipe penetrates through the middle of the reaction tank, and the water inlet pipe penetrates through the protective shell to be connected with the top of the reaction tank; the water inlet pipe penetrates through the protective shell and is connected with the bottom of the reaction tank, the water outlet pipe penetrates through the protective shell and is connected with the bottom of the reaction tank, the recycling pipe is connected with the bottom of the middle shaft pipe, one end of the recycling pipe penetrates through the protective shell, and the middle shaft pipe is provided with wave discs which are located in the reaction tank. The hollow stirring shaft is used as a crystal discharge channel, a relatively closed transmission environment is created, the flow is simplified through the integrated design, and the shutdown risk caused by pipeline blockage and pump failure is reduced.

The application discloses a kind of crosslinking coating for rubber product surface anti-adhesion durable lubrication, using the good bonding performance of fluorine rubber, polyurethane itself, can give coating better adhesion, impact resistance, weather resistance, resistance to chemicals and other properties;Using the characteristics of water-based polyurethane deblocking when heated at high temperature, crosslinking occurs, add liquid fluorine rubber containing hydroxyl group to promote polyurethane coating and natural rubber through covalent bond connection, firmly cover on the surface of rubber product, increase the durability of coating;Carboxyl-terminated liquid fluorine rubber and the carboxyl-terminated liquid fluorine rubber prepared after further reduction thereof are copolymerized to occur esterification reaction;Polyurethane, carboxyl-terminated liquid fluorine rubber and isocyanate curing agent react, and multiple crosslinking network structure is constructed among polyurethane and liquid fluorine rubber, rubber, and the network structure also interacts to play a synergistic effect, improve the mechanical properties of coating and the adhesion and mechanical properties on the surface of rubber product.

The invention discloses a modification process of liquid fluororubber, and relates to the technical field of liquid fluororubber. According to the modification process of the liquid fluororubber, a physical blending dissolution technology is adopted, specific plant oil-based polyester is used as a non-volatile carrier, and solid fluororubber is efficiently converted into liquid fluororubber under mild temperature and vacuum conditions. The invention aims to solve the technical problems of high energy consumption, large VOC emission, organic solvent residue, volume shrinkage during product application and the like in the existing production process. The mild temperature range of 60-70 DEG C is matched with the long-period stirring of 20-34 hours; the specific time and temperature window enables plant oil-based polyester molecules to have enough time to permeate into fluororubber molecular chains with high crystallinity, molecular-level unwrapping and swelling are achieved, dissolution uniformity is guaranteed, and breakage and degradation of the rubber molecular chains caused by high temperature are avoided.

The application provides a high-efficiency liquid fluorine removal agent based on a ternary copolymer, which is prepared by copolymerization of crystalline aluminum chloride AlCl3.6H2O, lanthanum chloride LaCl3.7H2O and polyvinyl alcohol PVA in water, wherein the mass percentage of each component is as follows: 30-60% of the crystalline aluminum chloride, 0.5-5% of the lanthanum chloride, 0.1-2% of the polyvinyl alcohol, and the balance of water. 3+ The ordered complex of Al 3+ and La is controlled by pH gradient in the preparation method of the application, so that structural defects are avoided. Urea is added in the application for assisting mixing, the urea can inhibit the entanglement of PVA molecular chains, improve the uniformity of combination of PVA chains and metal ions and the complexing efficiency, and reduce local aggregation. The ternary copolymer liquid fluorine removal agent provided by the application is simple in preparation process, convenient in dosing, high in economy and efficiency, and can be widely applied to the advanced treatment of various low-concentration fluorine-containing wastewater.

The invention discloses an epoxy composite lithium salt solid electrolyte and a preparation method and application thereof, and belongs to the technical field of polymer electrolytes. The method comprises the following steps: completely dissolving a fluorine-containing high-molecular polymer in a solvent, carrying out a dehydrofluorination reaction on adjacent vinylidene fluoride VDF chain segments on a main chain under the action of a strong alkali at room temperature to generate carbon-carbon double bonds, then breaking the double bonds under the action of an oxidizing agent to form carbonyl groups, and further oxidizing the carbonyl groups into carboxyl groups to obtain the carboxyl-terminated liquid fluorine rubber. And then adding a reducing agent in a stirring state, and slowly dropwise adding an iodine solution while introducing argon to obtain liquid fluorine-containing rubber. And curing the liquid fluorine-containing rubber and epoxy, and adding the composite lithium salt for blending to obtain the polymer electrolyte membrane. The fluorine-containing high-molecular polymer is used for replacing PVDF (Polyvinylidene Fluoride), so that the phase separation in the film forming process is reduced, and the solubility is improved. And the added composite lithium salt improves the conductivity of lithium ions and improves the cycling stability of the battery.

The invention discloses a liquid fluorine-containing polymer and a preparation method thereof, a battery monomer and an electric device. A battery cell includes an electrode assembly and an electrolyte, the electrolyte including an electrolyte and a liquid fluorine-containing polymer; the number average molecular weight of the liquid fluorine-containing polymer is 500 to 10000 Da. According to the embodiment of the invention, the thermal stability, the chemical stability and the ionic conductivity of the electrolyte can be improved, and the reliability and the cycling stability of the battery monomer can be improved when the electrolyte is used for the battery monomer.

The invention belongs to the technical field of high polymer material modification, and particularly relates to a wide-temperature-range high-and-low-temperature-resistant gutta-percha modifier and a preparation method thereof. The gutta-percha comprises the following components in parts by weight: 100 parts of gutta-percha, 4-6 parts of polyhedral oligomeric silsesquioxane, 2-4 parts of nano cerium oxide, 8-12 parts of a polyester plasticizer, 3-5 parts of liquid fluorine rubber, 0.8-1.2 parts of insoluble sulfur, 0.3-0.5 part of an accelerant, 5-8 parts of magnesium oxide and 0.1-0.2 part of an antioxidant. The polyhedral oligomeric silsesquioxane in the gutta-percha can form a nano-cage network to limit disentanglement of molecular chains, so that the thermal decomposition temperature of the gutta-percha is increased, the thermal stability of the gutta-percha in a high-temperature environment is greatly improved, and the gutta-percha can be used for a long time under a high-temperature condition without obvious thermal decomposition and performance degradation; and the glass-transition temperature is reduced by the polyhedral oligomeric silsesquioxane, so that the gutta-percha can still keep good flexibility and impact performance at low temperature, and material embrittlement and performance reduction caused by temperature reduction are avoided.

The present disclosure provides a modified polyurethane material with excellent rain erosion resistance and weather resistance, and a preparation method and use thereof. In the present disclosure, a hydroxyl-terminated liquid fluoro rubber and a hydroxyl-terminated silane are adopted as modification materials to introduce silicon-containing and fluorine-containing materials into polyurethane. In addition, a filler and a corresponding additive are added, and physical cross-linking points are formed from the filler to further adsorb hydroxyl-terminated silicon / fluorine, so as to produce a homogeneous material. In this way the modified polyurethane material with excellent rain erosion resistance and weather resistance is obtained.

The invention relates to a liquid fluorine purification rectifying tower which comprises a tower top condenser, a rectifying tower kettle and a rectifying tower body arranged on the rectifying tower kettle, the rectifying tower kettle and the rectifying tower body are both made of titanium steel alloy materials, and the tower top of the rectifying tower body is connected with the input end of the tower top condenser. The tower top of the rectifying tower body is provided with a tower top temperature measuring port, the tower top temperature measuring port is provided with a temperature measuring piece, and the temperature measuring piece is interlocked with a refrigerant inlet valve and a refrigerant outlet valve of a tower top condenser. The rectifying tower is made of a titanium steel alloy material, so that the service life of the tower can be prolonged, the maintenance cost is reduced, and major safety and environmental protection hidden dangers caused by improper material selection are solved; the efficiency and stability of the rectifying tower are greatly improved, energy consumption and emission are reduced, and the safe, environment-friendly and efficient effects are achieved.

The present application relates to the field of fluorine-containing coating materials, and particularly relates to a wear-resistant fingerprint-resistant liquid fluorine-containing coating material, a preparation method and application. The fingerprint-resistant liquid fluorine-containing coating material comprises, in terms of weight fractions, 15-25 parts of ethyl acrylate, 20-30 parts of methyl methacrylate, 3-10 parts of hydroxyethyl methacrylate, 12-18 parts of hexafluorobutyl acrylate, 5-15 parts of a fluorine-containing allyl benzoxazine, 2-6 parts of an adhesive, 1-5 parts of an initiator, 0.1-0.5 parts of a leveling agent, 0.05-0.15 parts of a defoaming agent, 0.5-2.5 parts of a light stabilizer and 12-20 parts of a solvent. After the fingerprint-resistant liquid is treated by UV light, polymerized and solidified, the obtained fluorine-containing coating material has not only the advantages of high-temperature resistance and solvent resistance, but also more excellent hydrophobicity and wear resistance compared with traditional acrylate fingerprint-resistant materials.