59 results about "Hexamethyldisiloxane" patented technology

The invention discloses a hexamethyldisiloxane preparation method capable of purifying a raw material, and relates to the technical field of chemical preparation, the hexamethyldisiloxane preparation method capable of purifying the raw material comprises the following steps: S1, raw material preparation: cooling deionized water through a cooling system, and maintaining the temperature to be less than or equal to 10 DEG C, then injecting part of the cooled deionized water into a tubular reactor, pumping trimethylchlorosilane and methylbenzene into a premixing tank according to a proportion, and uniformly stirring and mixing; s2, catalytic promotion: injecting diluted hydrochloric acid into the tubular reactor, uniformly mixing the diluted hydrochloric acid with deionized water, and maintaining the pH value to 2-3; according to the hexamethyldisiloxane preparation method capable of purifying the raw materials, redundant steps such as catalyst recovery and repeated washing can be omitted through the hydrolysis reaction, the method is suitable for continuous production, meanwhile, the process of the hydrolysis reaction is optimized by changing the use steps and the input method of the deionized water, and the stability in the preparation process is further maintained.

The invention relates to the field of textile functional finishing agents, in particular to an organosilicon waterproof finishing agent and a preparation method thereof.The preparation method comprises the steps that octamethylcyclotetrasiloxane, hexamethyldisiloxane, tetramethylcyclotetrasiloxane and an initiator are mixed to react, and side chain hydrogen-containing silicone oil is obtained through filtering; the preparation method comprises the following steps: mixing side chain hydrogen-containing silicone oil with 4-vinyl epoxy cyclohexane and a methacrylate compound, reacting under the protection of nitrogen, and adding a catalyst to obtain modified silicone oil; mixing and reacting the modified silicone oil with a coupling agent to obtain amino modified silicone oil; the preparation method comprises the following steps: mixing side chain hydrogen-containing silicone oil with allyl polyethylene glycol for reaction to obtain a nonionic silicon-containing surfactant; and finally, mixing the amino modified silicone oil with a nonionic silicon-containing surfactant, adding an acid solution, and adding water for emulsification to obtain the organosilicon waterproof finishing agent. Through the specific modified silicone oil and the nonionic silicon-containing surfactant, a uniform and stable waterproof film is formed on the surface of the fabric, the waterproof grade is improved, and the waterproof finishing agent is suitable for waterproof finishing of various fabrics.

The utility model relates to the field of chemical equipment, in particular to a hexamethyldisiloxane mixing reaction kettle, which comprises a supporting seat and a mixing kettle, the supporting seat is used as a supporting structure of the mixing kettle, a sealing cover plate is arranged at the top of the mixing kettle, two feeding pipes are arranged at the top of the sealing cover plate and are respectively used for adding a silane precursor and water, and the sealing cover plate is used for sealing the mixing kettle. Each feeding pipe is provided with a valve, a motor is mounted at the bottom in the mixing kettle, and an output shaft of the motor is connected with a stirring paddle. A set of high-precision temperature control system is integrated by the thermal insulation shell, the temperature controller, the circulating pipe, the temperature detector and the controller, temperature change can be quickly responded by utilizing the temperature controller and the circulating pipe, the temperature in the kettle is ensured to quickly reach and be stabilized at a set value, the influence of temperature fluctuation on reaction is avoided, and the temperature in the kettle is continuously monitored by utilizing the temperature detector, so that the reaction time is shortened. And data are fed back to the temperature controller in real time, so that closed-loop control of the temperature is realized, the stability and consistency of reaction conditions are ensured, and the product quality is improved.

The invention provides a continuous production device and method of volatile dimethyl silicone oil, continuous production of the volatile dimethyl silicone oil is realized, the problem of low one-way yield is solved, and the method comprises the following specific steps: S1, vaporizing a dimethyl siloxane ring body and hexamethyldisiloxane through a vaporizer to obtain a gas-phase mixture; s2, introducing the gas-phase mixture into a reaction tower, and generating a dimethyl silicone oil mixture from the gas-phase mixture under the action of a solid acid catalyst; s3, short-chain volatile dimethyl silicone oil in the dimethyl silicone oil mixture is pulled out from the tower top, and a volatile dimethyl silicone oil mixture is obtained; enabling long-chain liquid-phase dimethyl silicone oil to fall into a tower kettle, heating the long-chain liquid-phase dimethyl silicone oil through a reboiler, reentering the reaction tower, and continuously reacting with the gas-phase mixture obtained in the step S1; and S4, further separating the volatile dimethyl silicone oil mixture obtained in the step S3 to obtain MDM, MD2 M and MD3M, and returning the residual MM and dimethyl siloxane ring bodies to the step S1 for recycling.

This application relates to the field of siloxane preparation, specifically disclosing a method for preparing hexamethyldisiloxane, comprising the following steps: A) Concentrated hydrochloric acid and trimethylchlorosilane are sequentially fed into a hydrolysis reactor for hydrolysis to obtain hydrolysis products; the hydrolysis reactor includes a stirred tank, the bottom wall of which is provided with elastic hollow spheres; B) The obtained hydrolysis products are fed into a heat exchanger, then into a gas-liquid separation tower, and finally into a purification condenser; C) The mixture of hexamethyldisiloxane and concentrated hydrochloric acid obtained from the bottom of the gas-liquid separation tower and the mixture of hydrochloric acid and hexamethyldisiloxane obtained from the bottom of the condenser are fed into a separator for separation; the upper oily liquid is separated into a hexamethyldisiloxane washing tank, and after washing, crude hexamethyldisiloxane is obtained and fed into a hexamethyldisiloxane intermediate tank. The preparation method of this application has the advantage of improving the production efficiency and yield of hexamethyldisiloxane.

The application discloses a kind of polymer resin for photoresist, negative photoresist and recycling method.The preparation method of polymer resin is: using functional polycarbonate, p-acetyl oxystyrene, initiator, star-shaped RAFT agent to prepare polymer resin.Using 2-benzyl (methyl) amino-9H-thioxanthene-9-ketone, 3-chloropropyl triethoxysilane, potassium carbonate, triethoxysilane compound and 1,1,1,1,3,3,3-hexamethyl disiloxane to prepare photo initiator.Photolithography is compounded by polymer resin, photo initiator and additive, solvent.The negative photoresist has good thermal stability, and can be recycled by specific filter film, and the recovery rate is 79-83%.The application combines chain free volume design and mobility control, and improves the glass transition temperature of material;And photoresist waste liquid can be recycled.The negative photoresist can be used in wafer level advanced packaging, micro-nano processing, high-end optics and other fields.

The invention belongs to the technical field of aerogel preparation, and relates to a method for preparing a silicon dioxide aerogel felt through catalysis of acid ion exchange fibers. The method for preparing the silicon dioxide aerogel felt through catalysis of the acid ion exchange fibers comprises the steps that an aerogel base material fiber felt and an ion exchange fiber felt are stacked and rolled into a roll shape, and the roll shape is coaxially arranged on a reel arranged in a reaction kettle; injecting an aerogel precursor prepared in advance into the reaction kettle until the coiled material base material is immersed to form a gel aerogel fiber felt; immersing the fiber felt in a hexamethyldisiloxane hydrophobic modification liquid, heating and aging for a certain time, and discharging the modification liquid; and heating and drying the aerogel fiber felt by hot nitrogen air blast to obtain the finished product silicon dioxide aerogel felt. Through an acid ion exchange fiber catalysis process, the reaction condition is mild, the reaction rate is effectively improved, the production period is shortened, and the catalyst does not need to be separated, can be recycled for multiple times, is pollution-free and environment-friendly, and has a relatively large aerogel mass production prospect.

The invention discloses a resin material for 3D printing and a preparation method thereof, and relates to the technical field of photosensitive resin materials. When the resin material for 3D printing is prepared, 3-isocyanate propyl methyl dimethoxy silane is blocked by p-nitrophenol, so that blocked 3-isocyanate propyl methyl dimethoxy silane is prepared; the preparation method comprises the following steps: carrying out condensation on blocked 3-isocyanate group propyl methyl dimethoxy silane, 3-mercaptopropyl methyl dimethoxy silane and hexamethyldisiloxane, so as to prepare blocked isocyanate group mercapto silicone oil; the preparation method comprises the following steps: loading a resorcinol bis (diphenyl phosphate) flame retardant on glass flakes modified by silane to prepare flame-retardant modified glass flakes; the preparation method comprises the following steps: reacting epoxy acrylate, blocked isocyanate sulfydryl silicone oil, acryloyl morpholine and a photoinitiator to prepare photosensitive resin, and compounding the photosensitive resin with flame-retardant modified glass flakes to prepare the resin material for 3D printing. The prepared resin has high mechanical property, flame retardant property and thermal stability.

Various exemplary devices, systems, and methods for multi-layer anti-stick coatings for surgical tools are provided. In general, a method of manufacturing a surgical tool includes forming, using plasma enhanced chemical vapor deposition with hexamethyldisiloxane as a precursor material, a first coating on a conductive tissue treating surface of the end effector and a second jaw component of the end effector, the first coating comprising a first material, wherein the first material is a first silicone material, and applying a second coating on top of the first coating on the first jaw component and the second jaw component, the second coating comprising a second material, wherein the coatings are effective to prevent tissue sticking to the jaws during an electrosurgical sealing procedure.

The invention provides a method for preparing aerogel powder from waste gel, and belongs to the technical field of aerogel material preparation. The method comprises the following steps: by taking waste wet gel generated when an aerogel product is produced from an organic silicon source as a raw material, adding an ammonium fluoride solution, stirring and uniformly mixing, adding hexamethyldisiloxane, n-butyl alcohol and hydrochloric acid for modification, cooling and standing after modification, and separating out an upper-layer gel solution; stirring and cleaning with pure water, standing to obtain washing water, adding a sodium hydroxide aqueous solution, stirring and cleaning, and standing to obtain alkali washing water; and drying through closed-loop spray drying equipment to obtain the aerogel powder. According to the method, resource utilization of the waste gel is achieved, the production cost of the aerogel powder is reduced, environmental pollution is reduced, and the obtained aerogel powder has good hydrophobicity and heat insulation performance.

The invention discloses high-refraction phenyl silicone oil and a preparation method thereof, and relates to the technical field of organosilicone, the high-refraction phenyl silicone oil comprises the following raw materials: phenyl trichlorosilane, diphenyl dichlorosilane, methyl trichlorosilane, dimethyl dichlorosilane, hexamethyldisiloxane, a catalyst and a solvent; the preparation is performed based on the raw materials. According to the invention, by reasonably regulating and controlling the ratio of the phenyl trichlorosilane to the diphenyl dichlorosilane, premature crosslinking of the system is avoided while high refractive index is maintained; by introducing methyl trichlorosilane and dimethyl dichlorosilane, the flowability and viscosity are accurately adjusted, and the optical performance and the processability are both considered; and hexamethyldisiloxane is added in batches in the condensation stage to form a uniform end sealing structure, so that the high-refraction phenyl silicone oil with narrow molecular weight distribution and stable and controllable refractive index is obtained. The transparency and the thermal stability of the material are improved, and the bivariate accurate matching capability of the refractive index and the viscosity is remarkably improved.

The invention discloses tris (trimethylsilyl) phosphate and a preparation method thereof, and belongs to the field of chemical synthesis. The invention relates to a preparation method of tris (trimethylsilyl) phosphate, in particular to a preparation method of tris (trimethylsilyl) phosphate, which comprises the following steps: hexamethyldisiloxane and phosphorus pentafluoride are subjected to heating reaction under a stirring condition to obtain tris (trimethylsilyl) phosphate, and the molar ratio of hexamethyldisiloxane to phosphorus pentafluoride is (5-10): 1. Phosphorus pentachloride is replaced with phosphorus pentafluoride, and due to the fact that fluorine atoms are small in radius and large in electronegativity, phosphorus is high in electropositivity and small in steric hindrance, phosphorus pentafluoride can react with hexamethyldisiloxane more easily, a catalyst is not needed, the cost of tris (trimethylsilyl) phosphate can be greatly reduced, and the yield of tris (trimethylsilyl) phosphate is high.

The invention relates to the technical field of organic silicon materials, in particular to an efficient synthesis process of high-hydrogen-content silicone oil. The process comprises the following steps: firstly, mixing and filtering methyl hydrogen ring body and hexamethyldisiloxane in an inert atmosphere to prepare a refined raw material solution, and then dispersing a special and magnetically separable sulfonic acid carbon-silicon composite solid acid catalyst into part of the raw material solution to form a stable suspension; and pumping the mixture and the residual raw material solution into a micro-channel reactor for ring-opening polymerization and equilibrium reaction, and then carrying out three-stage gradient vacuum low-temperature removal purification. According to the process, Si-H bond side reaction is effectively inhibited, efficient magnetic separation and recovery of the catalyst are achieved, and the obtained product is high in hydrogen content, narrow in molecular weight distribution, light in color, good in stability and suitable for high-end application.

The invention discloses a corrosion-resistant aluminum alloy and a preparation method thereof, and relates to the field of aluminum alloys. When the corrosion-resistant aluminum alloy is prepared, palygorskite reacts with mercaptopropyltrimethoxysilane, then p-vinylphenylboronic acid and N-[2-(dimethylamino) ethyl] acrylamide are grafted, then the reaction product reacts with bromohexane, and functionalized palygorskite is obtained; aluminum alloy powder and stearic acid are subjected to ball milling, hot pressing and anodic oxidation to obtain pretreated aluminum alloy; the preparation method comprises the following steps: reacting 2, 4, 6, 8-tetramethylcyclotetrasiloxane, 3-aminopropylmethyldimethoxysilane and hexamethyldisiloxane, and sequentially grafting 3-formylphenylboronic acid and acrylic acid to obtain modified polysiloxane; and uniformly mixing the modified polysiloxane and the functionalized palygorskite, and depositing the mixture on the surface of the pretreated aluminum alloy to obtain the corrosion-resistant aluminum alloy. The corrosion-resistant aluminum alloy prepared by the invention has excellent antibacterial, corrosion-resistant and mechanical properties.

The application discloses a recycling method of reflux condensate in liquid silicone rubber base glue preparation, and water in the reflux condensate generated in the liquid silicone rubber base glue preparation process is removed first; the reflux condensate after water removal can be used for base glue preparation instead of part of silazane, and can also be added into an enamel reaction kettle, concentrated sulfuric acid is added, the temperature is increased to 50-100 DEG C, and after 1-5 hours of reaction, the sulfuric acid is removed by layering, the sulfuric acid can be reused to base glue tail gas absorption, and the remaining reflux condensate is washed to neutral, and hexamethyldisiloxane can be obtained by rectification. The effective recycling of the reflux condensate is solved, and cost reduction and benefit increase are realized.

The application belongs to the technical field of compound preparation, and particularly relates to a preparation method of an alkali metal salt of an oxalate chelate structure, at least comprising the following steps: mixing tris(trimethylsilyl) phosphate, an oxalate and a phosphorus-containing or boron-containing fluorine compound in a first organic solvent, stirring and heating to obtain lithium phosphate, trimethyl fluorosilane gas, and difluorobisoxalate phosphate or difluorooxalate borate, filtering the reaction solution to obtain lithium phosphate solid and a difluorobisoxalate phosphate solution or a difluorooxalate borate solution; adding a second organic solvent for recrystallization after concentration; and obtaining difluorobisoxalate phosphate or difluorooxalate borate solid after filtration, and drying the solid under reduced pressure to obtain a finished product. The process is simple, and the cost is low. By-products lithium phosphate, potassium fluoride and hexamethyldisiloxane can be directly sold as products after purification. Therefore, the application has an atomic utilization rate close to 100%, no invalid waste, less three-waste emissions, and is friendly to the environment.

The invention provides the preparation method of the heat-resistant methyl phenyl silicone oil, the process is simple and convenient, the arrangement of methyl phenyl structural units is uniform, and the content of ethyoxyl is low. The preparation method comprises the following steps: carrying out partial monomer modification on methylphenylsiloxane hydrolysate by adding a metal compound to form a stable Si-O-M bond (M is a metal component), carrying out two-stage equilibrium reaction on methylphenylsiloxane condensate and hexamethyldisiloxane, supplementing an alkaline catalyst, deionized water and a polar solvent in the second-stage reaction, and carrying out polymerization reaction to obtain the high-molecular-weight polydimethylsiloxane. The hydrolysis of residual alkoxy and the condensation of hydroxyl are promoted, the arrangement of a methyl phenyl structure unit and the precise control of an impurity end-capping group are synergistically realized, and the thermal stability of the methyl phenyl silicone oil is greatly improved.

The present invention provides a low-hardness, lightweight, flame-retardant sealant, and its preparation method and application. The sealant is mainly prepared by mixing the following raw materials: a 20,000 viscosity end-hydroxyl polydimethylsiloxane polymer, a high-viscosity end-hydroxyl polydimethylsiloxane polymer (viscosity of 450,000-550,000 cps at 25°C), a plasticizer, a flame-retardant filler, a lightweight additive, a thixotropic agent, a cross-linking agent, a curing agent, and an organic titanium catalyst; wherein the plasticizer is prepared by mixing the following raw materials: dimethyldimethoxysilane, methylphenyldimethoxysilane, trifluoropropylmethyldimethoxysilane, hexamethyldisiloxane, anhydrous methanol, concentrated hydrochloric acid, and deionized water. The prepared sealant has a Shore A hardness of less than 8, is resistant to high and low temperatures, resistant to aging, and has good flexibility, and can be applied to the field of power batteries.

The invention discloses a method for preparing a nano multi-layer composite film structure Fe / SiO2 material by an organic release film method, which comprises the following steps of: firstly, heating pentacarbonyl iron and hexamethyldioxane until the pentacarbonyl iron and the hexamethyldioxane are evaporated, and alternately depositing on a soluble film substrate by a chemical vapor deposition method under a vacuum condition to form a nano multi-layer Fe / SiO2 composite film; and dissolving the soluble film substrate by using a solvent, so that the nano multilayer Fe / SiO2 composite film is stripped from the substrate, and carrying out ultrasonic crushing, centrifugal separation and drying to obtain the nano multilayer composite film structure Fe / SiO2 material. The process adopted by the invention is a continuous production process, the total thickness, the number of composite layers and the thickness of each layer of the prepared nano multi-layer composite film structure Fe / SiO2 material can be accurately controlled, and the nano multi-layer composite film structure Fe / SiO2 material has a better absorption effect on microwaves in a frequency range of 2-18GHz.

The present application relates to the field of textile functional finishing agent, in particular to a kind of silicone waterproof finishing agent and preparation method thereof, comprising: octamethylcyclotetrasiloxane, hexamethyldisiloxane, tetramethylcyclotetrasiloxane are mixed with initiator and are reacted, and side chain hydrogen-containing silicone oil is obtained by filtration;Side chain hydrogen-containing silicone oil is mixed with 4-vinyl epoxycyclohexane and methacrylic acid ester compound, is reacted under nitrogen protection and catalyst is added to obtain modified silicone oil;Modified silicone oil is mixed with coupling agent and is reacted to obtain amino-modified silicone oil;Side chain hydrogen-containing silicone oil is mixed with allyl polyethylene glycol and is reacted to obtain non-ionic silicon-containing surfactant;Finally, amino-modified silicone oil is mixed with non-ionic silicon-containing surfactant, acid solution is added and emulsified with water to obtain silicone waterproof finishing agent.The application forms uniform and stable waterproof film on the surface of fabric by specific modified silicone oil and non-ionic silicon-containing surfactant, improves waterproof grade, and is suitable for waterproof finishing of various fabrics.

The invention provides functional end hydrogen-containing silicone oil with high Si-H activity and a production process of the functional end hydrogen-containing silicone oil. The hydrogen-terminated silicone oil is prepared from the following components: 78 to 85 percent of octamethylcyclotetrasiloxane, 0.15 to 0.45 percent of a metal organic framework loaded diacid catalyst, 4 to 8 percent of an amino functionalized hydrogen-containing end-capping reagent, 2.5 to 6 percent of a polyether-siloxane block regulator, 1 to 3 percent of hexamethyldisiloxane, 1.5 to 4 percent of absolute ethyl alcohol and 0.3 to 0.8 percent of a weakly alkaline adsorbent. According to the invention, the hydrogen-terminated silicone oil is based on octamethylcyclotetrasiloxane, has a stable polydimethylsiloxane main chain skeleton, has a controllable molecular chain length, contains amino groups which can react with carboxyl and epoxy groups, and has wide functions and application scenes; the molecular weight distribution is easy to regulate and control, the polyether-containing chain segment has good hydrophilicity, and the block structure improves the high and low temperature resistance.

The invention discloses a preparation method of an organic silicon defoaming composition, which comprises the following steps: stirring and mixing hydrogen-containing polysiloxane, MQ silicon resin and silicon dioxide to obtain a pre-dissolved substance, adding a catalyst, uniformly mixing, then adding hexamethyldisiloxane, heating to react to obtain a branched polysiloxane intermediate, adding hydroxyl-terminated polysiloxane and a base catalyst into the branched polysiloxane intermediate, and reacting to obtain the organic silicon defoaming composition. And adding silicon dioxide after stirring reaction, keeping the temperature at 100-160 DEG C, stirring, and finally cooling to room temperature, thereby obtaining the product. According to the method, a pre-reaction-secondary reaction step-by-step process is adopted, so that the viscosity increase of a system can be effectively controlled, the problem of sudden viscosity increase caused by rapid condensation of hydroxyl and MQ resin in a traditional one-step method is avoided, and the defoaming speed and the lasting foam inhibition performance of the prepared defoaming composition are remarkably improved. The defoaming agent prepared by the aid of the defoaming agent has excellent defoaming and foam-inhibiting performance in anionic and nonionic systems, has good wetting, spreading and leveling performance and is particularly suitable for being applied to the field of metal processing.

The utility model relates to the technical field of chemical engineering, in particular to a raw material hydrolysis reactor for preparing hexamethyldisiloxane, which comprises supporting seats, a shell, a reaction container, a motor, a rotating rod, a stirring plate, a feeding pipe, a discharging pipe and a first valve, a plurality of supporting seats are arranged on the lower portion of the shell, the reaction container is arranged inside the shell, the motor is arranged on the top of the shell, and the rotating rod is arranged on the rotating rod. An output shaft of the motor is connected with a rotating rod through a coupler, the rotating rod penetrates through the shell and the reaction container, a stirring plate is mounted at the lower end of the rotating rod, the top of the reaction container is connected and communicated with two feeding pipes penetrating through the shell, the bottom of the reaction container is connected and communicated with a discharging pipe penetrating through the shell, and a first valve is mounted on the discharging pipe. The dosage of raw materials added into the reaction container is accurately controlled through the feeding pipe, the flow meter and the second valve, the temperature of the reaction container is adjusted through the electric heating module, and the situation that the reaction is out of control due to the fact that excessive hexamethyldisilazane is added at a time is avoided.

This invention provides a filter membrane and its preparation method. The preparation method includes the following steps: placing a porous filter membrane substrate in an environment containing plasma and a precursor, and performing plasma treatment to obtain the filter membrane; wherein the precursor includes at least one selected from hexamethyldisiloxane, perfluorooctyltriethoxysilane, pentane, ethylene, toluene, perfluorohexane, styrene, divinylbenzene, hexamethyldisiloxane, tetramethylsilane, tetraethoxysilane, tetrafluoroethylene, and hexafluoropropylene. The filter membrane obtained by this preparation method can significantly reduce the swelling rate and simultaneously increase the permeation flux in organic solvents, achieving precise molecular weight cutoff.

The invention belongs to the field of organic silicon synthesis, and discloses a preparation method of methyl silicone oil containing side chain monovinyl, which is applied to preparation of liquid silicone rubber. The preparation method comprises the following steps: carrying out condensation polymerization on alpha, omega-hydroxyl polydimethylsiloxane and alpha, omega-hydroxyl polymethylvinyl siloxane under the action of a linear phosphonitrile chloride catalyst, then adding hexamethyldisiloxane for chain scission equilibrium, adding a terminator for neutralization reaction after the reaction is finished, and carrying out condensation polymerization to obtain the polydimethylsiloxane. And removing the low content of the obtained silicone oil intermediate to obtain the monovinyl methyl silicone oil product. The silicone oil is used for preparing the liquid silicone rubber, and the obtained liquid silicone rubber has good mechanical properties and does not produce oil after being stored for 3 months.

The invention discloses a method for preparing methyl silicone oil from a linear body, which comprises the following steps: selecting an organosilicon linear body, a dimethyl cyclosiloxane mixture and hexamethyldisiloxane as raw materials, and selecting acidic clay as a catalyst; carrying out prepolymerization reaction; after the prepolymerization reaction is finished, continuously heating and reacting to obtain methyl silicone oil; and distilling and filtering to obtain the methyl silicone oil with higher purity. By optimizing a reaction system and process parameters, the preparation efficiency and the product quality of the methyl silicone oil are improved, and the production cost is reduced.

This invention discloses a low-viscosity, high-flash-point hyperbranched fluorosilicone oil, its preparation method, and its insulating medium, belonging to the field of organosilicon polymer materials and electrical insulation technology. The branched fluorosilicone oil is polymerized from branched monomers, hexamethyldisiloxane, and siloxane cyclic compounds; the siloxane cyclic compounds are a mixture of dimethylsiloxane and fluorinated siloxane cyclic compounds. The above components are reacted at 80–120°C in the presence of a catalyst to obtain the hyperbranched fluorosilicone oil. This hyperbranched fluorosilicone oil has a three-dimensional molecular structure, low viscosity, a flash point above 300°C, high breakdown voltage, and an insulation performance retention rate greater than 85% after multiple breakdowns. This invention also discloses the application of this hyperbranched fluorosilicone oil as an insulating medium in power equipment, including at least one of transformers, reactors, instrument transformers, and cable terminals. The hyperbranched fluorosilicone oil provided by this invention is particularly suitable for electrical insulation applications requiring high fire resistance and long-term operational stability.

The utility model relates to hexamethyl disiloxane purification field especially relates to a kind of water content treatment devices of hexamethyl disiloxane removal, including filter box, support assembly, adsorption cylinder and conveying assembly, filter box is set in the upper portion of rectifying cylinder, the upper portion of rectifying cylinder is equipped with inlet, filter box is connected with rectifying cylinder through inlet, first filter plate is fixedly installed in the filter box, first filter plate is located in the upper portion of inlet, first filter plate is obliquely arranged, second filter plate is fixedly installed in the filter box, second filter plate is located below first filter plate, feeding port is equipped in the upper portion of filter box;The utility model is installed by filter box first filter plate and second filter plate, filter material by first filter plate, and the impurity is guided to the side of second filter plate to facilitate cleaning, the material remaining in impurity can be added into rectifying cylinder by second filter plate through second filter plate, reduce waste.

The invention discloses a preparation method and application of a glass fiber powder-silicon dioxide aerogel composite material, and belongs to a preparation method of an aerogel composite material. Mixing tetraethyl orthosilicate with absolute ethyl alcohol to obtain a mixed solution A; concentrated sulfuric acid and absolute ethyl alcohol are mixed to obtain a mixed solution B, and a mixed solution C is obtained; adding water into the mixed solution C for dilution and stirring to obtain a polyoxysiloxane precursor; the preparation method comprises the following steps: uniformly mixing a polyoxysiloxane precursor, a glass fiber powder ethanol solution and deionized water, and adding hexamethyldisiloxane and an ethanol solution of ammonia to obtain mixed gel; performing aging treatment on the mixed gel, immersing the aged gel by using a hydrochloric acid ethanol solution and hexamethyldisiloxane, and drying to obtain the glass fiber powder-silicon dioxide aerogel composite material. The prepared aerogel composite material has good hydrophobicity, erosion and permeation of water to the composite material can be relieved, the stability of the material is kept in a humid environment, and the service life of the material is prolonged.

The invention belongs to the field of high polymer materials, and particularly provides a synthesis method of low-cost hydrogen-containing MQ silicon resin. The method comprises the following steps: by taking water glass as a silicon source, hexamethyldisiloxane and hydrogen-containing double end sockets as organic silicon monomers and an alcohol solvent as a reaction medium, carrying out cohydrolysis and condensation under the catalysis of acid, washing with water, and removing low-molecular substances under reduced pressure, thereby obtaining the white powdery hydrogen-containing MQ silicon resin. According to the method, the raw material cost is remarkably reduced, the process is simple, the yield is high, the product solubility is good, the hydrogen content is controllable in the range of 0.1%-0.7%, and the method has a good industrial application prospect.