152 results about "Trimethylsilane" patented technology

The invention relates to a high-performance lithium-rich manganese-based lithium ion battery electrolyte with a flame-retardant function and a preparation method thereof, the high-performance lithium-rich manganese-based lithium ion battery electrolyte comprises a lithium salt and an electrolyte organic solvent, the lithium salt is a composite lithium salt, the composite lithium salt comprises lithium hexafluorophosphate and lithium salt additive lithium difluoro (oxalato) borate, and the electrolyte solvent comprises the electrolyte organic solvent and an additive, the additive comprises a positive electrode film-forming additive tris (trimethylsilane) phosphate and a flame-retardant additive ethyoxyl (pentafluoro) cyclotriphosphazene. The electrolyte has the advantages that the electrolyte not only has excellent cycle performance, but also has a flame-retardant function.

The invention discloses a system for purifying trimethylsilane containing dichlorosilane impurities, which comprises a reactive distillation column and a purification distillation column, and also discloses a method for purifying trimethylsilane containing dichlorosilane impurities, which comprises the following steps of: feeding trimethylsilane gas containing dichlorosilane impurities into the reactive distillation column; trimethylsilane gas containing dichlorosilane impurities enters the reaction section to react, the dichlorosilane impurities react to generate silane gas and a material containing tetrachlorosilane impurities, the silane gas is discharged from an exhaust port in the top of the reactive distillation tower, and the material containing tetrachlorosilane impurities enters the purification distillation tower from a discharge port in the bottom of the reactive distillation tower; according to the method disclosed by the invention, dichlorosilane is taken as a raw material, the dichlorosilane is taken as a raw material, the dichlorosilane is rectified in a purification rectifying tower and is collected at a tower top collecting port to obtain the high-purity trimethylsilane, the dichlorosilane impurity in the trimethylsilane can be effectively removed through the method disclosed by the invention, the high-purity trimethylsilane with the purity of 99.99% or above is obtained, the yield is greater than 85%, the process is simple, and the cost is low.

The invention discloses an electro-synthesis method of alpha-aminomethyl tetrazole, which comprises the following steps: by taking a platinum sheet as a cathode, a carbon rod as an anode and tetrabutylammonium tetrafluoroborate as an electrolyte under the catalysis of constant current, coupling tertiary amine, isonitrile and azido trimethylsilane by a one-pot method to prepare an alpha-aminomethyl tetrazole derivative, and carrying out post-treatment on the obtained reaction mixed solution, and carrying out column chromatography separation to obtain a pure alpha-aminomethyl tetrazole product. The alpha-aminomethyl tetrazole can be obtained only through one-step reaction, the operation steps are few, a large number of oxidizing agents and additives are not used, the post-treatment process is simple, and the product is easy to separate.

According to the high-temperature lithium ion battery electrolyte and the lithium ion battery containing the high-temperature lithium ion battery electrolyte, tris (trimethylsilane) phosphate, 2-(3-(trifluoromethyl)-1H-pyrazol-1-yl) acetonitrile and 1, 2, 3-trifluorobenzene are selected as additives in the electrolyte, and the three components can synergistically improve the high-temperature stability of the electrolyte, so that the high-temperature stability of the electrolyte is improved; and gas generated by thermal decomposition and side reaction is reduced, so that the risk that the internal pressure of the battery is abnormally increased or the battery swells due to the gas generated by the electrolyte in the high-temperature long-term storage process is reduced. Meanwhile, the influence of impurities in the electrolyte can be reduced, an electrochemical window is improved, the stability of the electrolyte can be kept at high temperature, and the service life of the battery can be prolonged.

The invention belongs to the technical field of thick oil emulsification viscosity reduction, and particularly discloses an amphiphilic Janus carbon nanotube thick oil emulsification viscosity reducer and a preparation method and application thereof, and the preparation method comprises the following steps: firstly, adding a multi-walled carbon nanotube into a strong acid solution; secondly, adding a first solvent, and then adding molten paraffin to obtain paraffin microspheres wrapped by activated carbon nanotubes; thirdly, adding into a second solvent, so as to obtain carbon nanotube paraffin microspheres asymmetrically modified by vinyl trimethylsilane; and finally, adding into a third solvent to react with the first modifier, and then adding into a fourth solvent to react with the second modifier to obtain the viscosity-reduced Janus carbon nanotube. According to the amphiphilic Janus carbon nanotube thick oil emulsifying viscosity reducer as well as the preparation method and the application thereof, the viscosity reduction rate reaches 99.47%, the amphiphilic Janus carbon nanotube thick oil emulsifying viscosity reducer has excellent wetting reversal and interfacial tension reduction capability, the recovery efficiency is improved by more than 25%, and the recovery efficiency improvement effect is remarkable.

The invention provides a low-temperature sodium-ion battery containing a modified negative electrode as well as a preparation method and application of the low-temperature sodium-ion battery. The low-temperature sodium-ion battery comprises a positive electrode, a negative electrode and an electrolyte, the negative electrode comprises negative electrode slurry, and the negative electrode slurry comprises an active substance, conductive carbon, sodium carboxymethyl cellulose and butadiene styrene rubber; the active substance comprises modified hard carbon; the modified hard carbon is prepared by oscillating and mixing hard carbon with a single-walled carbon nanotube, graphite carbon and soft carbon to obtain physical coating, further oscillating and mixing with the doped modified precursor powder, and calcining at high temperature to complete element doping and chemical coating; and the electrolyte comprises an additive selected from trimethylsilyl nicotinate, methyl 4-hydroxy-3-methoxycinnamate and the like. On one hand, the adhesive force of the negative electrode slurry on the current collector is improved, on the other hand, the solvent formula is optimized, the desolvation ability of sodium ions in the electrolyte is improved, the viscosity is reduced, and the additive is added to modify an electrode surface interface film, so that the charge-discharge performance of the battery at low temperature is improved.

The invention relates to the technical field of liquid foundation, and particularly discloses a lasting liquid foundation and a preparation method thereof. The invention discloses a lasting liquid foundation. The liquid foundation is prepared from the following raw materials in percentage by weight: 0.5 to 1 percent of thickener, 10 to 15 percent of first emollient, 2 to 5 percent of emulsifier, 1 to 3 percent of first stabilizer, 3 to 5 percent of acrylic acid (ester) / polytrimethylsiloxane methacrylate copolymer, 3 to 5 percent of trimethylsiloxy silicate ester, 0.5 to 3 percent of adsorbent, 0.05 to 1 percent of antioxidant, 10 to 15 percent of second emollient, 10 to 20 percent of coloring agent, 0.5 to 1 percent of second stabilizer, 1 to 5 percent of humectant, 0.05 to 1 percent of chelating agent, 1 to 10 percent of solvent, 0.5 to 1 percent of preservative and the balance of water. 0.1-1% of a third emollient and the balance of water.

The application relates to the technical field of cosmetics, in particular to a high-concealment makeup-maintaining air cushion and a preparation method thereof. A film forming agent in the high-concealment makeup-maintaining air cushion comprises the following: trimethylsiloxy silicate 5-7 parts, isododecane 0.3-0.7 parts, and acrylic acid (ester) / polymethyltrimethicone methacrylate copolymer 2-3 parts. A colorant comprises the following raw materials in parts by weight: titanium dioxide 5-7 parts, silica 0.8-1.2 parts, mica powder 5-7 parts, CI 77492 0.4-0.8 parts, aluminum hydroxide 0.8-1.2 parts, CI 77491 0.4-0.6 parts, triethoxyl octyl silane 0.8-1.2 parts, and CI 77499 0.3-0.5 parts. The particle size of the titanium dioxide at least comprises any two of 4 nm, 30-50 nm and 200-260 nm. The air cushion has the advantages of prolonging the makeup-maintaining time of the air cushion and improving the concealment effect.

The invention discloses a sodium ion battery electrolyte as well as a preparation method and application thereof, and belongs to the technical field of sodium ions. The sodium ion battery electrolyte provided by the invention comprises a sodium salt, an organic solvent, a main additive and an auxiliary additive, the main additive is one or more of sodium difluorophosphate NaDFP, sodium tetrafluoroborate NaBF4, sodium trifluoroacetate NaTFA or sodium nitrate NaNO3, and the auxiliary additive is one or more of sodium difluorophosphate NaDFP, sodium tetrafluoroborate NaBF4, sodium trifluoroacetate NaTFA or sodium nitrate NaNO3. According to the present invention, one or more of tris (trimethylsilane) borate TMSB, tris (trimethylsilane) phosphate TMSP, (pentafluorophenyl) silane TPFS or tris (trimethylsilane) phosphite TMSPi are adopted, the circulation capacity retention rate in a wide temperature range is significantly improved through the synergistic mechanism in a certain proportion range, the capacity retention rate is high at a high rate of 10 C and above, the rapid charging performance is provided, and the application prospect is broad. The cost is reduced; and commercialization is promoted.

The invention discloses a novel photochromic dye and a preparation method thereof, and belongs to the technical field of fine chemical synthesis and optical functional materials. The invention prepares a novel photochromic dye by reacting a diaryl ketone with (propynyloxy) trimethylsilane to generate a hydroxyl-functionalized diaryl alkynol, and reacting the diaryl ketone with succinate and acetic anhydride to generate a naphthol derivative, and reacting the naphthol derivative with the above-mentioned hydroxyl-functionalized diaryl alkynol to generate a cyclic lactone-modified naphthopyran compound. The photochromic dye has a fast discoloration speed, can be used in the fields of color-changing lenses, textiles, anti-counterfeiting, coatings, etc., and the preparation process is simple and easy to operate.

The utility model discloses a trimethylsilane production tail gas treatment device which comprises a treatment barrel, a plurality of supporting legs are fixedly arranged at the lower end of the treatment barrel, an upper cover is arranged at the upper end of the treatment barrel, a gas inlet pipe is fixedly arranged at the side end of the treatment barrel, an exhaust pipe is fixedly arranged on the upper cover, and a gas outlet pipe is fixedly arranged on the exhaust pipe. A cleaning structure is movably arranged in the treatment barrel, and the inner wall of the treatment barrel is cleaned through the cleaning structure; the cleaning structure comprises a first middle box, a first spray head and a scraping block, an electric push rod is fixedly arranged on the upper cover, a moving plate is connected to the electric push rod, the cleaning structure is arranged on the moving plate, a recycling structure is arranged at the lower end of the treatment barrel, and the recycling structure comprises a collecting box, a heat accumulator and a cover plate. And waste liquid and heat are recycled through the recycling structure.

The invention provides liquid foundation and a preparation method thereof. The liquid foundation comprises the following components in parts by weight: 0.5-20 parts of a coloring agent, 5-35 parts of an emollient, 1-15 parts of an emulsifier, 1-15 parts of an auxiliary material, 0.01-10 parts of a film-forming agent and 5-95 parts of deionized water, the film forming agent is prepared from glycerol abietate, dextrin palmitate, trimethylsiloxy silicate ester and triacontyl PVP (Polyvinyl Pyrrolidone). According to the liquid foundation provided by the invention, the coloring agent, the emollient and the emulsifying agent are matched, and the specific film-forming agent is supplemented, so that a waterproof protective film can be formed on the surface of skin, the liquid foundation is light and thin in texture, the anti-sweat and waterproof effects can be achieved, meanwhile, the makeup holding performance can be remarkably improved, color migration can be prevented, and the effects of long-acting makeup holding and no decoloration are achieved.

The invention relates to a low-expansion moisture-resistant electronic component packaging resin adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials. The resin adhesive comprises the following components: modified resin, phenyl methyl organic silicon resin, epoxy vinyl resin, a dynamic functional curing agent, a microencapsulated dicyandiamide curing agent, perfluorooctyltriethoxysilane, functional filler and the like; the modified resin is obtained by modifying hydrogenated bisphenol A epoxy resin with hydrogen-terminated polydimethylsiloxane and trimethylsiloxy silicate ester, adding a silane coupling agent and mixing; the dynamic function curing agent is obtained by reacting hexamethylenediamine and intermediate powder obtained by reacting 2, 3-dihydroxy benzaldehyde with pinacol borane; the functional filler comprises silicon dioxide and boron nitride which are subjected to surface treatment by a silane coupling agent. The low-expansion and high-moisture-resistance electronic component packaging resin adhesive is prepared from the components according to a specific ratio and a specific method, the components have a synergistic effect and play advantages, and the packaging reliability and the service life of an electronic component are guaranteed.

The present invention provides a method for selecting an inorganic filler, which can select an inorganic filler suitable for use in combination with a silane coupling agent using a functional group present on the filler surface as an index, and a method for producing a surface-treated inorganic filler and a method for producing a composite material using the selected inorganic filler. [Solution] The method for selecting an inorganic filler is a method for selecting an inorganic filler having a hydroxyl group, and includes the steps of: reacting the inorganic filler having a hydroxyl group with a trimethylsilylating agent to obtain an inorganic filler having a trimethylsilyl group; measuring the carbon concentration in the inorganic filler having a trimethylsilyl group by elemental analysis and calculating the concentration A of trimethylsilylated hydroxyl groups in the inorganic filler having a trimethylsilyl group based on the carbon concentration; and selecting an inorganic filler having a hydroxyl group based on the hydroxyl group concentration A.

The invention discloses a preparation method and application of a silicon-based functionalized fluorenyl polysubstituted acetylene copolymer and a gas separation membrane thereof. Belongs to the technical field of polymer material and gas separation. The invention provides a new thought for preparation of a high-permeability gas separation membrane material. The preparation method comprises the following steps: carrying out copolymerization on 1-phenyl-2-(7-trimethylsilyl-9, 9-bis (trimethylsilyl-fluorene-2-yl) acetylene and 1-phenyl-2-(7-trimethylsilyl-9, 9-dimethyl-fluorene-2-yl) acetylene under the catalysis of TaCl5-n-Bu4Sn, so as to prepare a copolymer with high molecular weight; the preparation method comprises the following steps of: carrying out film casting on a solution of the nano-silver oxide, and then carrying out desiliconization treatment by using normal hexane / trifluoroacetic acid to obtain a gas separation membrane with the thickness of 100-220 microns, the specific surface area of 298-492 m / g and the total pore volume of 0.134-0.299 cm / g. The prepared separation membrane has the advantages that the COpermeability is up to 36,900 Barrer, the Opermeability is 19,800 Barrer, the thermal decomposition temperature exceeds 420 DEG C, the separation membrane can be used for separating gases such as COO, ON and the like, the preparation process is simple and convenient, and the industrial potential is realized.

A method of controlling stress variation in a layer including silicon oxycarbide formed using a capacitively coupled plasma enhanced chemical vapour deposition system. The method includes providing a chamber comprising a platen for supporting a substrate, placing a substrate, upon which a layer comprising silicon oxycarbide is formable, upon the platen, introducing a gas comprising oxygen into the chamber, introducing trimethylsilane gas into the chamber, generating a plasma within the chamber, maintaining a temperature at which deposition takes place to less than 275° C., maintaining a pressure within the chamber in the range 1.5-3 Torr, and depositing the layer upon the substrate with a deposition rate >1.5 μm / minute.

The present invention relates to the technical field of carbon nanotube modification, specifically a flame-retardant carbon nanotube conductive material and a preparation process thereof. The method comprises the following steps: S1: reacting chlorinated carbon nanotubes with 4-aminobenzophenone and DOPO in sequence to obtain DOPO-carbon nanotubes; S2: reacting chain polyphosphazenes with (1-hydroxyallyl)trimethylsilane and oxetane-3-thiol in sequence to obtain oxacyclic-chain polyphosphazenes; and S3: mixing DOPO-carbon nanotubes, oxacyclic-chain polyphosphazenes, and pyrrole to prepare the flame-retardant carbon nanotube conductive material.

The application discloses a trimethylsilane purification system containing dichlorosilane impurities, comprising a reaction rectifying tower and a purification rectifying tower, and discloses a trimethylsilane purification method containing dichlorosilane impurities. Trimethylsilane gas containing dichlorosilane impurities enters the reaction rectifying tower, and the trimethylsilane gas containing dichlorosilane impurities enters a reaction section to react. Dichlorosilane impurities react to generate silane gas and material containing tetrachlorosilane impurities. The silane gas is discharged from a tower top exhaust port of the reaction rectifying tower, and the material containing tetrachlorosilane impurities is discharged from a tower bottom discharge port of the reaction rectifying tower and enters the purification rectifying tower. The high-purity trimethylsilane is collected in a tower top collecting port through rectification in the purification rectifying tower. The dichlorosilane impurities in the trimethylsilane can be effectively removed through the method disclosed by the application, high-purity trimethylsilane with a purity of more than 99.99% is obtained, the yield is greater than 85%, and the process is simple and low in cost.

The present application relates to the technical field of foundation products, in particular to a foundation product with a two-phase film-forming system and a preparation method thereof, which is prepared from the following raw materials in terms of mass percentage: phase A: 0.1-5% of an organic silicon surfactant, 2-35% of a colorant, 0.02-20% of a silane film-forming agent, 0.01-55% of a conditioning agent, and 0.02-5% of a silicon-modified clay; phase B: 0.001-1% of a plant-derived film-forming agent, 1-20% of a polyhydric alcohol humectant, 0.1-2% of an inorganic salt, 0.1-2% of a preservative, and deionized water to make up the rest; the silane film-forming agent at least includes trimethylsiloxysilicate and polymethylsilsesquioxane; and the plant-derived film-forming agent at least includes a too-kui agave leaf extract. The foundation product with the two-phase film-forming system has good water resistance, skin adhesion, and durability, and the product has finer powder and better skin adhesion, thus better meeting the use requirements of consumers.

The invention relates to the field of batteries, and particularly discloses a reversed-phase micro-micelle electrolyte system for an aqueous battery as well as a preparation method and application of the reversed-phase micro-micelle electrolyte system. The electrolyte system is composed of tris (trimethylsilane) phosphate, isopropanol, metal salt and water, and a reverse micelle structure with the average hydration size of 1-2 microns is formed through molecular self-assembly among the components. The unique structure limits water molecules in micelles and near an electrode interface, and cooperates with a firm SiO2-P2O5 inorganic interface layer generated on the surface of an electrode in situ to jointly inhibit side reactions such as decomposition of water, so that an electrochemical stability window of an electrolyte system at-20-60 DEG C is 5.0-6.0 V. When the composite material is applied to a water-based zinc ion battery, the super-long cycle life under high voltage and wide temperature range can be realized at the same time, and a new scheme is provided for developing a water-based energy storage device with high performance and high safety.

The present disclosure relates generally to the field of synthetic organic chemistry. More specifically, the disclosure is directed to a continuous flow process for synthesis of azides from alcohols and peroxides, wherein the process comprises azidation with trimethylsilyl azide and a catalyst Amberlyst-15. It is a non-hazardous, mild and controlled reaction giving good yields of azides. The azides can be further employed for synthesis of medicinally and industrially useful chemicals.

The application relates to the technical field of sodium ion batteries, in particular to an electrolyte for a sodium ion battery and a sodium ion battery thereof. The electrolyte comprises organic solvents, sodium salts and additives in percentage by weight. The additives comprise malonic acid compounds, nitrile compounds and tris(trimethylsilyl) phosphate. The additives of the electrolyte comprise macromolecular malonic acid compounds, which can effectively react with alkaline substances on the surface of a positive electrode material, form a film on the positive electrode, slow down or prevent the decomposition of the electrolyte solvent by the alkaline substances; meanwhile, the tris(trimethylsilyl) phosphate and the nitrile compounds in the electrolyte can effectively inhibit the oxidation reaction of Fe and Ni in the positive electrode and prevent the reduction of Fe and Ni in the negative electrode; the above-mentioned joint action can effectively improve the cycle life of the sodium ion battery.

The invention discloses a preparation method of 6-ethynyl pyrazolo [1, 5-a] pyridine, which comprises the following steps: carrying out a sonogashira coupling reaction on 2, 5-dibromopyridine to obtain 2, 5-bis ((trimethylsilyl) ethynyl) pyridine; carrying out nitrogen amination reaction by using a nitrogen aminating agent, so as to obtain 1-amino-2, 5-bis ((trimethylsilyl) ethynyl) pyridine; and carrying out ring closing under the action of a catalyst, and carrying out a desilicication methyl reaction by using tetrabutylammonium fluoride to obtain the 6-ethynyl pyrazolo [1, 5-a] pyridine. According to the preparation method of the 6-ethynyl pyrazolo [1, 5-a] pyridine, low-cost raw materials are used, reaction conditions are easy to control, the reaction selectivity is high, byproducts are few, and the preparation method is suitable for large-scale production of the 6-ethynyl pyrazolo [1, 5-a] pyridine.

The invention discloses a multilayer polycyclic aromatic hydrocarbon organic membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: cleaning and drying a polyacrylonitrile substrate; dropwise adding a poly [1-(trimethylsilyl)-1-propyne] solution on the polyacrylonitrile substrate, and carrying out spin coating to form a uniform supporting layer; the preparation method comprises the following steps: preparing pre-prepared hexa (tripyridine) hexaphenylbenzene polycyclic aromatic hydrocarbon into a hexa (tripyridine) hexaphenylbenzene polycyclic aromatic hydrocarbon monomolecular layer compressed film by adopting a Langeron film preparation instrument, and transferring the monomolecular layer compressed film to the surface of a polyacrylonitrile substrate spin-coated with a poly [1-(trimethylsilyl)-1-propyne] layer; the multi-layer polycyclic aromatic hydrocarbon organic membrane is obtained by repeating the monomolecular layer compression and horizontal contact transfer process, the efficient size exclusion effect is achieved, and the method has the advantages of high permeability, high selectivity, rapidness and low-cost preparation.

This invention discloses a sodium-ion battery electrolyte, belonging to the field of sodium-ion battery technology, comprising an organic solvent, a sodium salt, and additives; the organic solvent includes ethylene carbonate, propylene carbonate, methyl ethyl carbonate, and ethyl acetate; the sodium salt includes sodium hexafluorophosphate and sodium difluorosulfonylimide; the additives include fluoroethylene carbonate, vinylene sulfate, sodium difluorophosphate, sodium difluorooxalate borate, and tris(trimethylsilane)phosphate. The sodium-ion battery electrolyte of this invention, through precise adjustment of the solvent and sodium salt ratio, maintains high conductivity at extremely low temperatures, significantly raising the lower limit operating temperature of the battery to -70°C. Simultaneously, through the synergistic effect of the sodium salt and additives, a high-temperature resistant SEI film rich in inorganic components is formed, reducing side reactions at high temperatures and raising the upper limit operating temperature of the battery to 85°C, achieving a wide temperature range application of the battery from -70°C to 85°C.

The invention belongs to the technical field of chemical detection, and particularly relates to a sample pretreatment method and a GC-MS (Gas Chromatography-Mass Spectrometer) method for simply and rapidly detecting glycidol and monochloropropanol in heated cigarette aerosol. The invention provides a sample pretreatment method for simply and rapidly detecting glycidol and monochloropropanol in heated cigarette aerosol. The sample pretreatment method comprises the following steps: capturing particulate matters in the heated cigarette aerosol; mixing the trapping material trapping the particulate matters with ethyl acetate and an internal standard substance, extracting to obtain an extracting solution, and diluting with ethyl acetate; n, O-bis (trimethylsilyl) trifluoroacetamide is added for a derivatization reaction, and a solution to be detected is obtained. According to the present invention, the ethyl acetate is adopted to extract the sample, and the analysis can be performed through the simple dilution and BSTFA derivation, such that the sample pretreatment step is simplified, the volatility and the stability of the glycidyl, the 3-MCPD and the 2-MCPD are increased, and the analysis sensitivity of the target object is improved;

The invention relates to a PVDF (Polyvinylidene Fluoride) material with a dispersing and anti-gel function for positive electrode slurry, and the PVDF material has the following structural formula: # imgabs0 #, wherein in the structural formula, G1 is a co-grafting functional part and comprises, but not limited to, one or more of vinyl trimethoxy silane, styrene ethyl trimethoxy silane, 3-(methylacryloyloxy) propyl trimethoxy silane, vinyl tri (2-methoxyethoxy) silane, (4-vinyl phenyl methyl) trimethylsilane and the like. According to the PVDF material, under the condition that more added functional parts are not introduced, the dispersion stability of the existing lithium battery positive electrode slurry can be remarkably improved, the anti-gel property of the slurry is enhanced, and the applicability of the lithium battery positive electrode binding material in different slurry systems is improved.

The application discloses a kind of anti-inflating inner tube rubber compositions and preparation method thereof, belong to rubber composition preparation technical field.The composition is composed of the following components: butyl rubber, modified ethylene-propylene-diene rubber, polyester nanofiber, soft carbon black, paraffin oil, silane coupling agent, activator, petroleum resin, antioxidant, vulcanizing agent, accelerator;The silane coupling agent is the mixture of silane coupling agent Si-69, gamma-(methacryloyloxy) propyl trimethyl silane and N-(beta-aminoethyl)-gamma-aminopropyl trimethyl (ethyl) oxysilane with mass ratio 2:1:1.The air retention and inflation stability of the composition can be greatly improved by modifying ethylene-propylene-diene rubber, limiting the proportion of butyl rubber, and limiting the substance and ratio of silane coupling agent, which improves the service life and safety performance of the inner tube.

This invention belongs to the field of organosilicon thermally conductive materials, and provides a liquid silicone rubber system for thermally conductive pads and its preparation method. The system comprises vinyl-terminated dimethyl polysiloxane, MQ / phenyl-enriched pre-crosslinked polysiloxane microgel, vinyltrimethoxysilane-modified hexagonal boron nitride, alumina, trimethylsilane-terminated dimethylsiloxane-methylhydrosiloxane copolymer, 1,3-divinyl-1,1,3,3-tetramethyldisiloxane zero-valent platinum complex, and 1-ethynyl-1-cyclohexanol, forming a two-component packaging. This system is advantageous in balancing thermal conductivity, electrical insulation, flowability, defoaming, softness and fit, and long-term stability, making it suitable for the preparation of thermally conductive pads.

The invention belongs to the technical field of organic electroluminescent materials, and particularly relates to a compound containing a methane derivative and an organic electroluminescent device.The central methane derivative of the series of compounds has certain flexibility, molecules are matched more tightly in the evaporation process, and the film-forming property of the material is good; meanwhile, substituent groups such as electron-withdrawing CF3, diimide and trimethylsilane are introduced into outer side groups of the series of compounds, so that the action of an external electric field on electrons can be inhibited, the electron polarizability is reduced, and the low refractive index requirement of the material is met.