93 results about "Polymethylhydrosiloxane" patented technology

The invention provides silicone rubber and a preparation method thereof. The invention provides silicon rubber. The silicon rubber is prepared from the following raw materials: vinyl-terminated polydimethylsiloxane, vinyl MQ silicon resin, an adhesion promoter, titanium dioxide, polymethylhydrosiloxane and a reaction inhibitor. The preparation method of the silicone rubber comprises the following steps: in the presence of a catalyst, mixing a mixture of vinyl-terminated polydimethylsiloxane and vinyl MQ silicon resin, an adhesion promoter, titanium dioxide, polymethylhydrosiloxane and a reaction inhibitor to obtain the silicone rubber. The silicone rubber disclosed by the invention has high reflectivity, low thixotropy, high fluidity, high heat resistance and storage stability, and is relatively simple in production process and suitable for industrial production.

The invention relates to the technical field of electronic packaging adhesives, in particular to a coating film for COB (Chip On Board) surface treatment and a preparation process of the coating film. According to the invention, titanium-containing polysiloxane is prepared, and titanium atoms are connected into the structure of polysiloxane, so that the high temperature resistance and mechanical properties of the COB packaging adhesive are improved, and the mechanical properties, high temperature resistance and aging resistance of a coating film are further improved; according to the present invention, the organosilicon elastomer microspheres and the oyster shell powder-polymethylhydrosiloxane graft are subjected to mutual crosslinking so as to obtain the organosilicon elastomer composite material, such that the thermal expansion coefficient and the mechanical property of the COB packaging adhesive can be adjusted by using the oyster shell powder component so as to further enhance the mechanical property and the high temperature resistance of the coating film, and reduce the warping rate of the coating film; and the curing forming speed of the covering film is increased, the curing time is shortened, and the production efficiency is improved.

The invention provides a silicone rubber material for a composite insulator and a preparation method thereof.The silicone rubber material is prepared from, by mass, 100 parts of vinyl-terminated polydimethylsiloxane, 12-16 parts of hydrophobic modified white carbon black, 3-5 parts of borate modified white carbon black, 5-7 parts of hydroxyl-terminated polydimethylsiloxane, 8-12 parts of polymethylhydrosiloxane and 0.001-0.005 part of a platinum catalyst, and 0.1-1 part of a light stabilizer. Through the synergistic effect of boric acid ester modified white carbon black and hydroxyl-terminated polydimethylsiloxane introduced into a silicone rubber system, an organic-inorganic composite interface structure with a reversible bonding characteristic can be constructed in the material, so that a polydimethylsiloxane chain segment can realize slow-release migration and dynamic compensation in a complex service environment; therefore, the hydrophobicity retentivity and the surface self-recovery capability of the composite insulator silicone rubber are remarkably improved.

The invention discloses a synthetic method for preparing corresponding hydroquinone through normal-pressure hydrogenation of quinone. Hydroquinone is an important compound, widely exists in natural products with biological activity, and is an important precursor for synthesizing various medicines, agricultural chemicals, polymers and functional materials. The method for reducing the quinone compound into hydroquinone is a simple and direct method. Although many reducing agents, such as SnCl2, Zn, Fe, Na2S2O4, NaBH4, polymethylhydrosiloxane (PMHS), have been used for this conversion, these processes are often affected by the use of stoichiometric or excess reagents, violent reaction conditions, and the formation of large amounts of waste. The hydrogenation reaction of quinone with H2 is obviously the most ideal way to achieve this conversion because it has high atomic efficiency and environmental friendliness. However, hydrogenation often needs high-pressure equipment or high temperature, so that the application potential is greatly limited. Accordingly, we we wish to exhibit a process for the hydrogenation of quinone to hydroquinone under atmospheric pressure.

The invention discloses a preparation method of a hydrophobic, flame-retardant, heat-insulating and photo-thermal characteristic coating. The preparation process comprises the following steps: firstly, mixing and stirring water and a binder into slurry A, sequentially adding cement, polymethylhydrosiloxane and a flame retardant, uniformly stirring respectively, then brushing the slurry on the surface of a substrate, drying at room temperature to obtain a primary coating, and polishing the primary coating; mixing a mixed binder, water, ammonia water and a siloxane compound to form a dispersion liquid, adding an oxide and a photothermal conversion filler, uniformly stirring, spraying the composite slurry on the surface of the polished primary coating, and drying at room temperature to obtain the multifunctional coating integrating flame-retardant, heat-insulating, super-hydrophobic and photothermal conversion functions. Cooperative integration of super-hydrophobicity, flame retardance, heat insulation and photothermal conversion performance of the material is built through layer-by-layer functionalization. The multifunctional coating has wide application prospects in the fields of aerospace, ocean engineering, green buildings, power transmission lines and the like.

The invention provides a heat-conducting water-blocking sealant, a preparation method thereof and a photovoltaic module. The heat-conducting and water-blocking sealant is prepared from the following raw materials in parts by mass: 50 to 100 parts of methyl vinyl siloxane, 50 to 100 parts of lignin, 10 to 50 parts of diamond particles and / or diamond alloy particles, 0.5 to 10 parts of a first cross-linking agent, 0.5 to 10 parts of a second cross-linking agent, 0.5 to 5 parts of a coupling agent and 0.05 to 1 part of a catalyst, wherein the first cross-linking agent is prepared from one or more of dicumyl peroxide, benzoyl peroxide, toluene diisocynate and hexamethylene diisocyanate; the second cross-linking agent comprises polymethylhydrosiloxane. The heat-conducting and water-blocking sealant disclosed by the invention has relatively good heat-conducting property, water-blocking property and electrical insulation property.

The invention discloses foamed silicone rubber and a fireproof material composed of the foamed silicone rubber, and is characterized in that the foamed silicone rubber is composed of a component A and a component B. The component A comprises the following raw materials in parts by mass: 100 parts of alpha, omega-dihydroxy polysiloxane, 0.5-8 parts of a hydroxyl compound, 0.1-5 parts of a foaming reaction catalyst and 0.1-5 parts of an organic metal catalyst; the component B comprises 100 parts of alkoxy-terminated polysiloxane and 1-50 parts of polymethylhydrosiloxane, and the foaming reaction catalyst comprises one or a combination of two of diethylhydroxylamine and an organosilicon compound containing an amino oxygen group. The reaction ratio of the component A to the component B is (10: 1)-(1: 4). The bi-component foamed silicone rubber is low in manufacturing cost, capable of being stored for a long time, low in density, excellent in fireproof and flame-retardant performance, excellent in foam structure, excellent in bonding performance and convenient to prepare and construct on site.

The invention discloses a preparation method of a polymer solid electrolyte with a long service life and a wide electrochemical window. The preparation method comprises the following steps: S1, reacting a quinoline compound with metal sodium to obtain a biquinoline intermediate product; s2, firstly, reacting with brominated alkane; sequentially adding bromoethylene and divinyl ether for reaction to obtain an olefin-terminated biquinolinium compound; s3, carrying out a reaction on the biquinoline intermediate product and brominated olefin to obtain a binary olefin biquinolinium compound; s4, carrying out reaction on the polymethylhydrosiloxane and an olefin-terminated biquinolinium compound under the action of a catalyst to obtain modified polymethylhydrosiloxane; and S5, mixing with a binary olefin biquinolinium compound, a catalyst and lithium bis (trifluoromethylsulfonyl) imide, and heating, crosslinking and curing to obtain the polymer solid electrolyte. The polymer solid electrolyte prepared by the invention not only realizes a wide electrochemical window, but also ensures stable operation with long service life, and meets the requirements of batteries with high safety performance.

The invention belongs to the technical field of printed circuit board materials, and discloses a heat-resistant high-toughness PCB and a preparation method thereof. The preparation method comprises the following steps: carrying out hydrosilylation polymerization reaction on epoxy-terminated polybutadiene and polymethylhydrosiloxane in the presence of a catalyst and an organic solvent to obtain a polysiloxane modified epoxy-terminated polybutadiene solution, then uniformly mixing the polysiloxane modified epoxy-terminated polybutadiene solution with epoxy resin, an amino silsesquioxane curing agent and an inorganic filler, and carrying out extrusion molding to obtain the epoxy-terminated polybutadiene modified epoxy resin. A modified epoxy resin glue solution is obtained; the obtained modified epoxy resin glue solution is adopted to conduct glue dipping treatment on a non-conductive base material, then single-face or double-face copper foil coating is conducted, hot pressing curing is conducted, and a copper-coated base plate is obtained; and then cutting, drilling, copper deposition, etching and surface treatment are carried out to obtain the heat-resistant high-toughness PCB. The epoxy resin is modified by polysiloxane modified epoxy-terminated polybutadiene, so that the heat resistance and toughness of the obtained copper-clad substrate and PCB can be remarkably improved, and relatively high adhesive property can be kept.

The invention discloses a collophanite flotation combined collecting agent and a preparation method and application thereof. The phosphorite flotation combined collecting agent comprises agent components and water with the same mass, and the agent components are composed of, by mass, 40%-85% of mixed amine, 8%-30% of a mixed nonionic foaming agent and 7%-30% of a hydrophobic accelerant; the mixed amine is a mixture of N-dodecyl ethanolamine and alkoxylated polyethyleneimine; the mixed nonionic foaming agent is a mixture of methyl isobutyl carbinol and C5-C9 fatty acid ethyl ester; the hydrophobic accelerant is a mixture of polymethylhydrosiloxane and kerosene. The components of the collecting agent are optimized, the synergistic effect of all the components is exerted, the using amount of the collecting agent in the reverse flotation desilicication process is reduced, the production cost is reduced, and the flotation froth suitability and the flotation effect are improved.

The present invention relates to a gas diffusion electrode for synchronously enhancing O2 transmission and H2O2 selectivity, a preparation method and an application thereof. The preparation method is as follows: a conductive material, a polytetrafluoroethylene emulsion and polymethylhydrosiloxane are mixed in an organic solvent to obtain a mixed solution; the mixed solution is made into a viscous paste and coated on the surface of carbon cloth, and then hot pressing treatment is carried out to obtain an electrode intermediate; the electrode intermediate is subjected to calcination treatment to obtain a gas diffusion electrode for synchronously enhancing O2 transmission and H2O2 selectivity. The present invention also provides a gas diffusion electrode for synchronously enhancing O2 transmission and H2O2 selectivity prepared by the above preparation method. The present invention also provides an application of the gas diffusion electrode for synchronously enhancing O2 transmission and H2O2 selectivity in wastewater. The present invention solves the problem that in the existing electro-Fenton technology, the gas diffusion electrode has insufficient H2O2 production capacity due to high oxygen diffusion impedance and low H2O2 selectivity.

The invention discloses a cyan / blue light quantum confined CsPbBr 3 Composite material and preparation method and application thereof, the preparation method of the material comprises: preparing CsPbBr 3 Nanocrystal dispersion, in air environment, under stirring conditions, is introduced into CsPbBr 3 An amino-containing silane coupling agent was added to the nanocrystal dispersion to tailor its structure and obtain quantum-confined CsPbBr 3 colloidal solution, and the addition of polymethylhydrogensiloxane to quantum confined CsPbBr 3 The method is simple in preparation conditions and easy to obtain raw materials. The obtained quantum confined CsPbBr 3 The fluorescence wavelength of the composite material can be arbitrarily adjusted in the cyan and blue light regions, with high quantum yield and good stability. It has application prospects in full-spectrum lighting, optical communication, full-color display and other fields.

This invention relates to the field of silicone oil technology, and more particularly to a high-temperature resistant, high-film-forming release agent silicone oil, its preparation method, and its applications. The method is based on polymethylhydrosiloxane, and involves the introduction of phenyl groups, long-chain alkyl groups, and ≤3 mol% of 3,3,3-trifluoropropyl side chains through a multi-step hydrosilylation reaction. Finally, a high-performance release silicone oil is obtained through end-sealing and high-temperature release. The resulting silicone oil possesses excellent thermal stability, lubricity, and film-forming properties, making it suitable for efficient release applications in high-temperature composite materials, precision injection molding, and microelectronics processing, significantly superior to existing technologies.

The invention discloses ultralow-temperature-resistant polyurea foam as well as a preparation method and application thereof. The preparation method comprises the following steps: step 1, carrying out ring-opening reaction and condensation polymerization on amino double-terminated polydimethylsiloxane and ethylene carbonate to obtain polyurea containing a monoureido structure; and step 2, mixing the polyurea, the polymethylhydrosiloxane and the catalyst to obtain a premix, and foaming to obtain the polyurea foam. The foam is prepared by taking polyurea as a matrix and polymethylhydrosiloxane as a cross-linking agent and a foaming agent through one-step cross-linking foaming, wherein the polyurea is prepared from amino double-terminated polydimethylsiloxane and ethylene carbonate through a non-isocyanate route. The polyurea foam has an interval cross-linked structure, ureido groups are separated by flexible PDMS chain segments, and the material is endowed with chain segment motility and dynamic hydrogen bond recombination capability at extremely low temperature. The material has excellent impact resistance and elastic recovery capability, and is suitable for extreme environments such as aerospace, polar equipment and the like.

The application provides a high-transparency silicone rubber material and a preparation method thereof. The silicone rubber material comprises the following raw materials in parts by mass: 100 parts of methyl vinyl phenyl rubber, 10-30 parts of modified white carbon black, 3-5 parts of vinyl MQ silicone resin, 4-6 parts of polymethyl hydrogen siloxane, 1-1.5 parts of vinyl hydroxyl silicone oil and 0.001-0.003 parts of platinum catalyst. The modified white carbon black is obtained by grafting benzotriazole silane coupling agent and silicone oil onto the modified white carbon black. The benzotriazole silane coupling agent is obtained by urethane reaction of hydroxy benzotriazole compound and isocyanate silane coupling agent. The silicone oil grafting silane coupling agent is obtained by addition reaction of hydrogen-terminated polydimethylsiloxane and vinyl silane coupling agent. The silicone rubber material has good transparency and light stability.

The invention relates to the technical field of concrete admixtures, and discloses a polyether modified organic silicon defoaming agent for concrete and a preparation method thereof.According to the defoaming agent, PO-EO-PO triblock polyether starting from iso-tridecanol and phenyl modified polymethylhydrosiloxane are subjected to a hydrosilylation reaction to prepare polyether modified organic silicon; hydrophobic fumed silica is used as a core, MQ silicon resin is used as a shell to prepare the silicon paste of a core-shell structure, a polycarboxylic acid type dispersing agent is introduced to improve the compatibility with a water reducing agent, the defoaming time is 3-8 s, the foam inhibition time is 65-110 min, the gas content of concrete can be reduced by 74-89%, and the 28d compressive strength is improved by 24-40%.

The invention belongs to the technical field of thermal protection materials, and particularly relates to a high-performance polymer flexible ablation thermal protection material capable of generating high-temperature-resistant ceramic in situ. Through molecular design, the zirconium-containing vinyl silicone oil (VZSO) is synthesized, and high-temperature-resistant ceramic can be generated in an ablation environment. VZSO and vinyl silicone oil are linked through polymethylhydrosiloxane through a hydrosilylation reaction, VZSO modified silicone rubber (VZSO-SR) is obtained, and molecular-level compatibility and covalent binding of a zirconium-containing unit and a siloxane molecular chain are achieved. The VZSO-SR has high heat residual weight in the air; in addition, the VZSO-SR also has excellent ablation resistance, and can effectively reinforce the carbon layer through in-situ generation of high-temperature-resistant t-ZrO2 ceramic. The VZSO-SR provided by the invention provides a new material choice for developing a high-performance polymer flexible ablation-resistant material suitable for an ultrahigh-temperature environment, and has a good application prospect.

The invention provides heat-aging-resistant silicone rubber and a preparation method and application thereof, and the silicone rubber is prepared from the following raw materials in parts by mass: 100 parts of methyl vinyl silicone rubber, 30 to 50 parts of filler, 0.3 to 0.8 part of tetraethoxysilane, 0.5 to 2 parts of vinyl silane coupling agent, 0.5 to 2 parts of styrene-trialkoxysilane substituted cyclotriphosphazene and 4 to 6 parts of polymethylhydrosiloxane. 1 to 1.5 parts of vinyl hydroxyl silicone oil; 0.001 to 0.003 part of platinum catalyst. Tetraethoxysilane, a vinyl silane coupling agent and styrene-trialkoxysilane substituted cyclotriphosphazene are synergistically introduced into a silicone rubber system, and a multistage silica-phosphorus-nitrogen composite bonding structure is constructed in situ between the filler surface and a silica main chain in the crosslinking and curing process. The interface stability and thermochemical inertness of the material can be remarkably improved, so that the thermal aging resistance of the silicon rubber in a high-temperature oxidation environment is improved.

The invention discloses a release film for foamed silica gel and a preparation method of the release film, and belongs to the technical field of release film preparation. The release film for the foamed silica gel comprises a base material layer and a release coating, the release coating comprises the following raw materials: polydimethylsiloxane resin, polytetrafluoroethylene resin, an organic solvent, a fluorine-containing solvent, a cross-linking agent, an anchoring agent, a catalyst, a stripping agent, an inhibitor and an anti-sticking agent; the cross-linking agent is prepared from the following raw materials: polymethylhydrosiloxane and polytetrafluoroethylene resin. The invention further discloses a preparation method of the release film for the foamed silica gel. The invention can solve the problems of difficult stripping and quality damage of the foamed silica gel caused by adhesion due to interpenetration of the silicon release film and the foamed silica gel, and has the advantages of simple formula and easiness in preparation and operation.

The invention relates to the technical field of insulation, in particular to an anti-aging composite insulator and a preparation method thereof.The anti-aging composite insulator comprises an aluminum oxide ceramic green body and a composite coating; the composite coating is prepared from the following raw materials in parts by weight: 60 to 80 parts of hydroxyl-terminated polydimethylsiloxane, 5 to 10 parts of amino modified polymethylhydrosiloxane, 1 to 3 parts of an epoxy silane coupling agent, 5 to 10 parts of LaFeO3 / TiO2 heterojunction nanoflowers, 0.01 to 0.1 part of dibutyltin dilaurate and 40 to 60 parts of a diluent, the composite insulator prepared by the invention has excellent ultraviolet aging resistance and stain resistance, and can be widely applied to power transmission lines of power systems in China.

This invention provides a zero-grid oil leakage thermal pad and its preparation method. Without changing the type and ratio of thermally conductive filler, the types of vinyl-terminated polydimethylsiloxane and polymethylhydrosiloxane, or the hardness of the thermal pad, this invention achieves a reduction in oil leakage value from the typical range of 52-23.6 grids to zero grids by adjusting the combination of vinyl-terminated polydimethylsiloxane and polymethylhydrosiloxane. Furthermore, as an auxiliary material, this invention further verifies the influence of the thermal pad's hardness and the overall proportion of the silicone oil system on oil leakage.

The invention belongs to the technical field of electrolyte and solid-state battery materials, and particularly relates to fluorine-containing polyether electrolyte, a high-energy-density solid-state metal lithium battery and a preparation method of the high-energy-density solid-state metal lithium battery. The preparation method comprises the following steps: firstly, preparing a product A by taking polymethylhydrosiloxane and polyethylene glycol diacrylate as raw materials, and then carrying out hydrosilylation reaction by taking the product A and a fluorine-containing monomer as raw materials to obtain the fluorine-containing polyether electrolyte, so that the fluorine-containing polyether electrolyte is ensured to have good heat resistance; the preparation method comprises the following steps: preparing a lithium-manganese-based positive electrode material, mixing fluorine-containing polyether electrolyte and triethylene glycol divinyl ether to form a precursor solution, soaking the lithium-manganese-based positive electrode material in the precursor solution for in-situ assembly treatment, and compounding with a polypropylene diaphragm and a lithium negative electrode material to obtain the high-energy-density solid-state metal lithium battery which has good electrochemical performance.

This invention belongs to the field of coating technology, specifically relating to a linear high-polysilane-reinforced wear-resistant antireflective coating and its preparation method. Using tetraethyl orthosilicate and methyltriethoxysilane / methyltrimethoxysilane as co-precursors, an alkaline network silica sol is synthesized under alkaline conditions via a sol-gel method. Using poly(methylhydrosiloxane) as the silicon source, a linear high-polysiloxane sol is synthesized under the action of a catalyst. The two silica sols are then mixed, aged, and ammonia-removed to obtain a neutral mixed sol. A double-sided antireflective coating is then deposited on a borosilicate glass surface using an dip-coating method. Finally, the coating is calcined in a muffle furnace at 550°C for 2 hours to obtain the wear-resistant antireflective coating. The prepared antireflective coating exhibits high transmittance and good wear resistance. The preparation process avoids the use of acid, preventing corrosion of production equipment and environmental pollution, making the production operation green and environmentally friendly.

The invention discloses a heat-resistant anti-adhesion release film special for a multilayer ceramic capacitor and a preparation method of the release film, and belongs to the field of electronic materials. The preparation method comprises the following steps: selecting a modified PET (Polyethylene Terephthalate) film containing nano aluminum oxide particles as a base material layer; the preparation method comprises the following steps: dissolving fluorine-containing silane grafted polyimide and a hyperbranched polyester polysiloxane block copolymer in a mixed organic solvent to prepare a functional coating solution, and forming a functional coating on a base material through coating and stepped heating curing; and coating the functional coating with a release layer coating liquid prepared from vinyl-terminated polydimethylsiloxane, polymethylhydrosiloxane, a platinum catalyst, an acrylate silane coupling agent, vinyl MQ silicon resin and the like, curing, and rolling to obtain the release film. The release film prepared by the method has excellent heat resistance, adhesion resistance and dimensional stability, is particularly suitable for a high-temperature process link in the manufacturing process of a multilayer ceramic capacitor, can effectively prevent film adhesion, and ensures the production quality and efficiency of the capacitor.

The invention discloses a high-strength sealing silica gel material for an automobile seat massage system and a preparation method of the high-strength sealing silica gel material, and belongs to the technical field of sealing materials and automobile parts. The invention provides a high-strength sealing silica gel material. The high-strength sealing silica gel material is prepared from the following raw materials: methyl vinyl silicone rubber, phenyl fluoride / silicone rubber, fumed silica, hydroxyl vinyl silicone oil, tetramethyl tetravinyl cyclotetrasiloxane, polymethylhydrosiloxane, a platinum catalyst and vinyl trimethoxy silane. By adjusting a base rubber system, the strength of the prepared sealing silica gel material is remarkably improved under the condition that the hardness is not improved and the dosage of nano reinforcing filler such as fumed silica is not increased, meanwhile, excellent elasticity and processing performance are kept, and the sealing silica gel material can be suitable for an automobile riding massage system, effectively absorbs pulse stress and is good in stability.

A method for preparing 2,5-hexanedione using 5-chloromethylfurfural, the method includes the following steps: adding the 5-chloromethylfurfural, a catalyst, polymethylhydrosiloxane, tetrahydrofuran, and water into a reaction vessel to catalyze a synthesis of the 2,5-hexanedione from the 5-chloromethylfurfural.

The invention relates to a preparation method of polyether modified silicone oil, which belongs to the technical field of polyether modified silicone oil, and comprises the following steps: carrying out reaction on octamethylcyclotetrasiloxane, fluorocyclosiloxane and polymethylhydrosiloxane to obtain low-hydrogen silicone oil; reacting low-hydrogen silicone oil with allyl polyether, silane grafted nanoparticles and glycidyl methacrylate to obtain a compound; and combining the compound with dialkyl dithiophosphate to obtain the polyether modified silicone oil. According to the technical scheme, octamethylcyclotetrasiloxane, fluorocyclosiloxane and polymethylhydrosiloxane are combined, so that the surface tension of polyether modified silicone oil can be remarkably reduced, and low-hydrogen silicone oil is combined with allyl polyether, silane grafted nanoparticles and glycidyl methacrylate, so that the surface tension of the polyether modified silicone oil is remarkably reduced. The thermal stability and wettability of the polyether modified silicone oil are improved, the defoaming performance and storage stability of the polyether modified silicone oil are further improved through the dialkyl dithiophosphate, and the comprehensive performance of the polyether modified silicone oil is overall improved.

The invention particularly relates to a waterproof heat-conducting bonding pouring sealant and a preparation method thereof. The waterproof heat-conducting bonding pouring sealant comprises a component A and a component B, wherein the component A comprises vinyl polydimethylsiloxane, polymethylhydrosiloxane, a heat-conducting filler, color paste, an inhibitor and a tackifier; and the component B comprises vinyl polydimethylsiloxane, a heat-conducting filler and a catalyst. Vinyl phenyl siloxane is selected as a powder treating agent, so that the compatibility of powder and a system is improved, and a benzene ring can be introduced into molecules through a hydrosilylation reaction; by autonomously synthesizing the tackifier, adopting polymethylhydrosiloxane with higher hydrogen content as a reaction raw material, introducing an epoxy group and an alkoxy group into a molecular chain segment through hydrosilylation reaction, increasing a plurality of reaction active sites, and quickly reacting with a hydroxyl group on the surface of a base material to achieve a quick bonding effect after being in contact with the bonding base material; and water vapor is effectively prevented from entering the electronic component from a bonding interface.

This invention discloses a modified polymethylhydrosiloxane electrolyte additive, its preparation method, electrolyte, and applications, belonging to the field of lithium metal batteries. The additive of this invention has a siloxane main chain, with at least one of carbonate and fluoroalkane substituents and an ether substituent introduced into the side chain. This allows the modified polymethylhydrosiloxane, when used as an electrolyte additive, to effectively reduce side reactions between lithium metal and the electrolyte, inhibit lithium dendrite growth, and maintain the crystal structure of the high-nickel cathode, reducing its disintegration and nickel ion deposition. When compounded with carbonate organic solvents as an electrolyte and applied to lithium metal batteries, it effectively improves the cycle stability and coulombic efficiency of lithium metal batteries.

A production method for 4,4'-diaminodiphenyl ether. The production method comprises the following steps: (A) carrying out a hydrogenation reaction on 4,4'-dinitrodiphenyl ether to obtain a first material liquid containing 4,4'-diaminodiphenyl ether; and (B) adding polymethylhydrosiloxane to the first material liquid obtained in step A, fully dispersing same to obtain a second material liquid, and cooling and crystallizing same to obtain solid 4,4'-diaminodiphenyl ether. The production method involves mild reaction conditions and simple operation and thus facilitates industrial production.