42 results about "Vinyl siloxane" patented technology

Disclosed are a negative electrode binder composition, a negative electrode binder and a preparation method therefor, a negative electrode sheet, a battery cell, and a battery. The negative electrode binder composition comprises the following components: an acrylic monomer, a hydroxydopamine monomer, a long-chain alkyl (meth) acrylate monomer, and a vinyl siloxane monomer.

The invention relates to the field of high polymer materials, and discloses a high-transparency and high-tear-resistance gas-phase silicone rubber composite material which is prepared by reacting raw materials containing the following components, the base rubber is an octamethylcyclotetrasiloxane (D4) monomer with the purity of more than or equal to 99.5%, and the content of hydrogen-containing siloxane impurities is less than or equal to 50ppm after vacuum distillation treatment; the nano filler is a core-shell type TiO2 coated SiO2 filler, the particle size of inner core TiO2 is 20 nm, the thickness of an outer shell SiO2 layer is 5-8 nm, the surface of the SiO2 layer is grafted with a silane coupling agent KH-570, and the grafting rate is larger than or equal to 85%; the flexibilizer is a hyperbranched organic silicon flexibilizer with the branching degree being greater than or equal to 80%; the initiator is a peroxide initiator DCP; the block ratio of the styrene-vinyl siloxane block copolymer is 3: 1, the shore hardness of the composite material is 70 degrees, the light transmittance is larger than or equal to 92%, and the tearing strength is larger than or equal to 35 kN / m. Compared with the prior art, the high-performance gas-phase silicone rubber provided by the invention has the advantages of high light transmittance and high tear strength, and has great technical value and economic significance.

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 application belongs to the technical field of cable materials, and discloses a cold-resistant and anti-cracking type special cable made of silicone rubber, which comprises a conductor cable core, an inner protective sleeve and an outer protective sleeve from inside to outside, wherein the raw materials of the outer protective sleeve comprise end-vinyl diphenyl siloxane, methyl vinyl siloxane, silane modified nano silicon dioxide, polyborosiloxane, an inhibitor, hydroxyl silicone oil, modified anti-ultraviolet polyurethane, a platinum catalyst and tetra(dimethylsiloxane) silane; diphenyl siloxane with a diphenyl side chain is selected as a main chain, and the modified anti-ultraviolet polyurethane is grafted to effectively destroy the structural regularity, inhibit low-temperature crystallization and prevent cable cracking; 4,4'-diamino benzophenone with anti-ultraviolet function is used as a chain extender and benzotriazole is used as an end-capping agent to be grafted into the polyurethane chain, so that the anti-ultraviolet capacity can be improved and migration can be avoided.

The invention discloses self-adhesive single-component liquid silicone rubber with low compression set and a preparation method thereof. The preparation method comprises the following steps: kneading high-viscosity double-end vinyl polydimethylsiloxane, white carbon black, hexamethyldisilazane and water to prepare base rubber; and uniformly mixing and stirring the base rubber with double-end vinyl polydimethylsiloxane, polydimethylmethylvinylsiloxane, polydimethylmethylhydrosiloxane, a first functional aid, a second functional aid, an inhibitor and a catalyst in proportion to prepare the single-component liquid silicone rubber. The silicone rubber has excellent bonding performance on various substrates such as stainless steel, aluminum materials, copper materials, kovar alloys, nylon, polycarbonate and PBT (polybutylene terephthalate), has excellent mechanical properties and low compression set rate, is suitable for sealing and bonding of various automobile, industrial and electronic components, and has wide application prospects. The present invention relates to a sealing strip, in particular to a sealing adhesive scenario for in-situ curing sealing gasket (CIPG) applications, instead of a conventional sealing strip.

The present invention relates to the technical field of high polymer material synthesis, and discloses an anti-clogging microreactor for high viscosity silicone rubber synthesis, the anti-clogging microreactor comprises a microreactor chip, and the interior of the microreactor chip is provided with a tree-shaped bifurcated microchannel network based on fractal structure design; the invention relates to a continuous preparation method of an anti-clogging microreactor for synthesizing high-viscosity silicone rubber. The continuous preparation method comprises the following steps: S1, precisely metering a methyl cyclosiloxane monomer and a vinyl siloxane monomer, and then inputting the methyl cyclosiloxane monomer and the vinyl siloxane monomer into the microreactor; s2, carrying out a controllable ring-opening polymerization reaction in the microchannel; and S3, quickly terminating the reaction by injecting a terminating agent on line, and controlling the molecular weight and distribution of the polymer. Compared with the prior art, the method has the advantages that the problems that an existing microreactor is prone to blockage and difficult to operate stably for a long time when treating a high-viscosity siloxane polymerization system are solved, meanwhile, the method can achieve accurate control over product quality and continuity and intellectualization of the production process, the production efficiency is remarkably improved, and energy consumption is reduced.

This invention discloses a superhydrophobic radiation-cooling polymer coating, its preparation method, and its application. The coating is white and possesses a bicontinuous micro / nano porous structure. It is prepared by a ternary copolymerization reaction of polyurethane acrylate oligomers, acrylate reactive diluents, and vinyl siloxane porogens. The method involves initiating free radical polymerization of monomers in the porogen under ultraviolet light, inducing rapid phase separation, and naturally evaporating the porogen to obtain the coating. This coating exhibits superhydrophobicity without post-treatment, virtually no absorption in the solar spectrum, and near-100% emissivity in the mid-infrared window. Furthermore, the optical properties and superhydrophobicity of the coating are minimally affected by long-term ultraviolet irradiation, thermal aging, acids, and alkalis. This coating can be applied over large areas in high-performance radiation-cooling applications.

The invention provides alkoxy-terminated polysiloxane and a preparation method thereof.107 silicone rubber, a platinum catalyst and an end-capping reagent are mixed and stirred at the room temperature for a dehydrogenation reaction, and the alkoxy-terminated polysiloxane is obtained. The end-capping reagent is obtained by mixing hydrogen-containing double end caps, vinyl siloxane and a platinum complex catalyst and then reacting at the temperature of 20-35 DEG C. The preparation process of the terminated 107 silicone rubber is carried out at room temperature, the raw material cost is low, the process is simple, the condition is mild, and the method is safe and energy-saving. The prepared terminated 107 silicone rubber is colorless transparent liquid, and has the advantages of controllable viscosity, high product termination rate, no viscosity peak and good storage stability. In addition, the reaction endpoint is easy to judge, and the reaction endpoint can be determined according to whether a viscosity peak exists or not.

The invention provides POE (Polyolefin Elastomer) functional resin as well as a preparation method and application thereof. The POE functional resin is prepared from the following raw materials in parts by weight: 100 parts of POE resin, 0.1 to 5 parts of first monomer alkoxy silane, 0.1 to 3 parts of second monomer polyvinyl siloxane and 0.05 to 0.5 part of initiator. The POE functional resin provided by the invention can solve the problems of low grafting rate, poor polarity increasing effect, low bonding strength, assistant migration and precipitation and the like in the existing POE grafted silane technology, and can achieve the technical effects of improving the silane monomer grafting rate, increasing the bonding force between POE and glass, improving the adhesive film strength and improving or solving the assistant migration and precipitation problem.

The invention discloses a synthesis method of a high-purity benzocyclobutenyl organosilicone monomer for semiconductor packaging resin, which specifically comprises the following steps: by taking vinyl silane and 4-bromobenzocyclobutene as reaction raw materials, firstly preparing benzocyclobutene-vinyl silane through Heck reaction, and then preparing benzocyclobutene-vinyl silane by taking a Meerwein reagent as a medium and potassium carbonate as an additive, thereby obtaining the high-purity benzocyclobutenyl organosilicone monomer for semiconductor packaging resin. And carrying out mild reaction in a polar aprotic solvent to directly prepare the high-purity benzocyclobutene organic silicon monomer tetramethyl divinyl siloxane dibenzocyclobutene. Compared with the traditional preparation method, the method has the advantages of wide reaction raw material source, low price, few reaction steps and high yield in synthesis, and the reaction is beneficial to the high purification process of the monomer, so that the method is more suitable for industrial batch production.

The application discloses a powdery interface agent prepared from a tertiary acetate redispersible emulsion powder, relates to the technical field of building materials, and can be reduced into an aqueous emulsion by stirring and dispersing after adding water and is used for interface sealing of concrete and cement-based surfaces. The application prepares the redispersible emulsion powder from a tertiary acetate emulsion by a spray drying process, and the emulsion is prepared from the following components in parts by weight: vinyl acetate 50-80 parts, unsaturated acid monomer 1-5 parts, tertiary carbonic acid vinyl ester 30-50 parts, vinyl siloxane 0.3-3.0 parts, polyvinyl alcohol 5-20 parts, emulsifier 1-5 parts, oxidant 0.3-1.0 parts, and deionized water 95-105 parts. The finally prepared interface agent is prepared from the following components in parts by weight: tertiary acetate emulsion powder 76-84 parts; sodium bicarbonate 8-12 parts; cellulose ether 3-6 parts; and powdery defoaming agent 3-5 parts. The powdery interface agent prepared by the application is stable in performance, is not affected by low-temperature freezing, is convenient to transport, thereby saving a large amount of packaging materials and transportation cost, and meets the current national energy-saving and emission-reducing and environmental protection policies.

A silicone rubber with UV aging resistance and low water absorption and its preparation method and application are provided. The preparation method uses a coupling agent KH570 and glyceryl monostearate to perform modified treatment on titanium dioxide to obtain modified titanium dioxide, uses a surface-modified coupling agent A171 and glyceryl monostearate to perform modified treatment on fumed silica to obtain modified fumed silica, and further performs subsequent treatment on methyl vinyl siloxane raw rubber, silicone oil, aluminum hydroxide, the modified fumed silica, the modified titanium dioxide, zinc oxide, α-alumina, a coupling agent KH560, a defoamer, iron oxide and a vulcanizing agent to obtain the silicone rubber. The silicone rubber prepared by the preparation method has low water absorption and excellent aging resistance, and its mechanical and electrical properties are also superior.

The application provides a siloxane benzocyclobutene prepolymer, a high-temperature-resistant low-dielectric ink for solvent-free inkjet 3D printing, and a preparation method and application thereof, relates to the technical field of high-performance inkjet 3D printing materials, and the siloxane benzocyclobutene / acrylate low-dielectric ink for solvent-free inkjet 3D printing is prepared by blending linear divinyl siloxane benzocyclobutene prepolymer and acrylate. After the printed ink is cured by light and heat, the ink has excellent dielectric properties, thermodynamic properties, mechanical properties and processing properties.

This invention relates to the field of nonwoven fabric technology, specifically to an antibacterial and skin-friendly polylactic acid (PLA) nonwoven fabric, its preparation method, and its application in wet wipes. The preparation method includes: Step 1, reacting vinylsiloxane monomer and dimethylaminoethyl methacrylate to prepare an organosilicon-tertiary amine copolymer; Step 2, reacting the organosilicon-tertiary amine copolymer with a quaternizing agent to prepare an organosilicon-quaternary ammonium salt copolymer; Step 3, melt-blending the organosilicon-quaternary ammonium salt copolymer with a polylactic acid matrix resin, extruding and pelletizing to obtain an antibacterial modified PLA masterbatch; Step 4, drying the antibacterial modified PLA masterbatch, followed by spinning, web laying, and hot rolling reinforcement to obtain the antibacterial and skin-friendly PLA nonwoven fabric. This invention fixes the quaternary ammonium salt to the polymer backbone in a covalent bond manner, endowing the nonwoven fabric with highly efficient and long-lasting antibacterial properties; the introduced side-chain siloxane spontaneously migrates to the fiber surface during spinning, reducing the coefficient of friction and simultaneously generating an internal plasticizing effect, significantly improving softness and skin-friendliness.

The application provides a special plastic concrete for circulating fluidized bed boilers and a preparation method thereof. In the binder, vinyl siloxane and octadecyl acrylate functional monomers are used to improve the bonding strength, styrene is used to improve the high-temperature resistance of the binder, and a pre-emulsified semi-continuous emulsion polymerization is used to obtain a polyacrylate thermoplastic resin with a core-shell structure as the binder, thereby improving the pressure resistance, heat insulation, high-temperature resistance and durability.

The invention relates to the technical field of high polymer materials, and discloses a damp-heat-resistant organic silicon modified epoxy acrylic resin emulsion as well as a preparation method and application thereof. The organic silicon modified epoxy acrylic resin emulsion is prepared from the following raw materials in parts by mass: 10 to 40 parts of bisphenol A epoxy resin, 20 to 50 parts of acrylic monomer, 2 to 8 parts of vinyl siloxane, 10 to 20 parts of alcohol ether solvent, 1 to 5 parts of polymerizable emulsifier, 0.5 to 2 parts of anionic emulsifier, 1 to 5 parts of initiator, 1 to 5 parts of neutralizer and 50 to 90 parts of deionized water. According to the emulsion, molecular-level synergy of rigid adhesive force of epoxy resin, toughness and weather resistance of acrylic resin and heat resistance and hydrophobicity of organic silicon is achieved, and finally, baking varnish can be subjected to self-crosslinking film forming only through high-temperature baking under the condition that a curing agent does not need to be additionally added; and the obtained paint film has high hardness, strong adhesive force, extremely excellent damp-heat resistance, salt mist resistance and aging resistance, and has excellent comprehensive performance.

The invention belongs to the technical field of functional materials, and particularly relates to a reduced graphene oxide-Fe3O4 composite material as well as a preparation method and application thereof. The reduced graphene oxide-Fe3O4 composite material disclosed by the invention is prepared from reduced graphene oxide and modified Fe3O4 grafted on the reduced graphene oxide; the modified Fe3O4 is obtained by modifying the silanized Fe3O4 by adopting a monomer containing sulfydryl and amino; and the silanized Fe3O4 is obtained by modifying Fe3O4 by using vinyl siloxane. The reduced graphene oxide is grafted and modified by the modified Fe3O4, so that the composite material not only has a two-dimensional graphene structure, but also has a zero-dimensional Fe3O4 structure, the composite material is endowed with good electromagnetic wave absorption performance, corrosion protection performance and heat conduction performance, and the purpose of integrating multiple functions is achieved.

The application discloses a kind of fluorine-free oil-proof agent of dendritic crosslinking structure and preparation method thereof, comprising the following steps: vinyl siloxane monomer, hydrogen-containing siloxane monomer, unsaturated double bond organic monomer copolymerization obtains dendritic structure silicon resin, dendritic structure silicon resin and solvent are mixed to obtain fluorine-free oil-proof agent of dendritic crosslinking structure;The molecular weight of vinyl siloxane monomer is 1000-3000;The molecular weight of hydrogen-containing siloxane monomer is 1000-3000;Unsaturated double bond organic monomer is any one or combination in vinyl aromatic monomer or olefin monomer.The dendritic structure silicon resin of the application has excellent comprehensive performance by unique molecular structure design, combines the advantages of dendritic polymer and silicon resin, has excellent comprehensive performance.High heat resistance enables it to be used stably in high temperature environment.

The application discloses an anti-icing conductor wire and a preparation method thereof, and belongs to the technical field of functional coating materials. The anti-icing conductor wire comprises a conductor wire and an anti-icing coating layer compounded on the surface of the conductor wire; the anti-icing coating layer comprises a crosslinking product and silicone oil; the crosslinking product is obtained by crosslinking and curing of vinyl siloxane and siloxane containing a silicon-hydrogen bond under a platinum catalyst. The anti-icing conductor wire has excellent anti-icing effect and can supplement the silicone oil to prolong the anti-icing period; the anti-icing conductor wire can be directly prepared and then put into actual line use, or the anti-icing layer can be compounded on an existing power transmission conductor wire line to obtain the anti-icing conductor wire.

The application discloses a kind of bio-based fibers and preparation method thereof, it is related to textile fiber technical field.The application is prepared when bio-based fiber, 1, 4-di (2', 3'-epoxy propyl) perfluorobutane is reacted with diethyl phosphinic acid to obtain flame-retardant dihydric alcohol;Terephthalic acid is dehydrated and condensed with bio-based 1, 3-propanediol, flame-retardant dihydric alcohol, and then reacted with hydroxyl-terminated dimethyl methyl vinyl (silicone and polysiloxane) to obtain modified bio-based polyester;Biomass graphene is reacted with 3-(methacryloyloxy) propyl trimethoxysilane to obtain modified biomass graphene;Modified bio-based polyester and modified biomass graphene are melt-mixed, extruded and granulated to obtain modified bio-based polyester / modified biomass graphene blend chip, and then melt-spun with dicumyl peroxide, false twist texturing to obtain bio-based fiber.The bio-based fiber prepared by the application has good warmth retention, flame retardant, hydrophobic and mechanical properties.

Disclosed are a multilayer core-shell structure polymer containing fluorine and silicon, a preparation method for a resin composition comprising same, and use thereof. The present invention belongs to the field of polymer materials. The multilayer core-shell structure polymer containing fluorine and silicon comprises an inner core, an outer shell layer, and an optional intermediate shell layer. The outer shell layer is obtained by reacting a vinyl siloxane, a fluorine-containing siloxane, and an alkyl siloxane, and is bridged to the inner core or the intermediate layer by means of vinyl siloxane. The prepared multilayer core-shell polymer with fluorine-containing polysiloxane as an outer shell layer helps to subsequently improve the hydrophobicity and chemical resistance of a resin composition comprising same.

The invention discloses high-temperature-resistant thermo-oxidative-aging-resistant flame-retardant oxygen-containing vacancy cerium-based filler silicone rubber and a preparation method thereof, and relates to a silicone rubber-containing composite material and a preparation method thereof. The silicone rubber composite material comprises a silicone rubber matrix and a cerium-based composite filler dispersed in the silicone rubber matrix, the filler is M / CeO2 nanoparticles, and the M / CeO2 nanoparticles are prepared through coprecipitation and calcination; optionally, vinyl-containing siloxane is used for modifying the surface of the Vinyl-M / CeO2 material, and a vinyl-grafted Vinyl-M / CeO2 material is obtained; and finally, mixing and vulcanizing the filler with vinyl silicone oil, hydrogen-containing silicone oil, an inhibitor, a platinum catalyst, white carbon black and other components. The cerium-based filler is subjected to transition metal doping and surface modification, so that the compatibility of the cerium-based filler with a silicone rubber matrix and the participation degree of the cerium-based filler in a curing system are remarkably improved. The material shows excellent thermal stability, flame retardance and thermo-oxidative aging resistance, keeps good mechanical properties and processing fluidity, and has wide application prospects in the high-end fields of electronic packaging, new energy batteries and the like.

The invention relates to the technical field of preparation of high-temperature-resistant silica gel materials, and discloses a high-temperature-resistant silica gel material and a preparation method thereof.The high-temperature-resistant silica gel material is prepared from, by mass, 60%-75% of methyl vinyl siloxane raw rubber, 10%-20% of silicone rubber, 5%-10 20%-30% of a reinforcing filler; 1.5%-2.5% of a processing aid; 4%-8% of a composite heat-resistant agent; 0.5%-1.0% of a cross-linking agent; 0.6%-3.8% of a functional auxiliary agent; the molar content of vinyl in the methyl vinyl siloxane raw rubber is 0.1%-0.3%, and the molecular weight of the methyl vinyl siloxane raw rubber is 400,000-700,000 Daltons. According to the invention, the composite heat-resistant agent formed by compounding the nano-scale rare earth oxide and the metal chelate according to a specific mass ratio is adopted; through the free radical capture effect of the rare earth oxide on a siloxane main chain and the coordination cross-linking synergistic interaction of the metal chelate, the oxidative fracture of a silicon-based side chain and the degradation of the main chain at high temperature are remarkably inhibited; good mechanical strength and rebound resilience can still be kept in a 200 DEG C high-temperature environment for a long time, and the service life of the material in the scenes of engine sealing, high-temperature cable insulation and the like is prolonged.

The invention discloses a high-performance lithium ion battery electrolyte and a preparation method thereof, and relates to the technical field of lithium ion batteries, the high-performance lithium ion battery electrolyte comprises the following raw materials: a composite electrolyte, a composite solvent, an additive and a surface modifier; the content of the additive in the electrolyte is 1.8 to 4.56 percent; the additive is prepared from pentafluorophenyl diethoxy phosphate, 2, 5-dichlorobenzotrifluoride and vinylene carbonate; the composite electrolyte comprises lithium bis (fluorosulfonyl) imide, lithium difluoro (oxalato) borate and lithium bis (trifluoromethylsulfonyl) imide; the composite solvent is prepared from ethylene carbonate, fluoroethylene carbonate, methyl trifluoroethyl carbonate and trimethylsilyl acetate; and the surface modifier is prepared from tetramethyl-tetravinyl siloxane and vinyl-triethoxy silane. The lithium ion battery electrolyte provided by the invention has excellent thermal stability and flame retardance.

The invention belongs to the field of sealants, and relates to an organic silicon sealant and a preparation method thereof. The organosilicon sealant contains hydrogenated polybutadiene modified vinyl siloxane, vinyl silicone oil, hydrogen-containing silicone oil, a platinum catalyst, an inhibitor and a reinforcing agent. The structure of the hydrogenated polybutadiene modified vinyl siloxane is shown as a formula (1). The organic silicon sealant obtained by adopting the hydrogenated polybutadiene modified vinyl siloxane as shown in the formula (1) as matrix resin not only has good air-blocking, water-blocking and acid-resisting properties in a short time, but also has the air-blocking, water-blocking and acid-resisting properties which are basically not reduced after long-time high-temperature operation. R1R2R3SiO [(Me2SiO) a (MeViSiO) b (CH2CH2CH2CH2) c (CH2CH (CH2CH3)) dO] nSiR1R2R3 Formula (1)

The invention belongs to the field of sealants, and relates to hydrogenated polybutadiene modified vinyl siloxane as well as a preparation method and application thereof. The structure of the hydrogenated polybutadiene modified vinyl siloxane is shown as a formula (1). The sealing silica gel obtained by adopting the hydrogenated polybutadiene modified vinyl siloxane as shown in the formula (1) as matrix resin not only has good air-blocking, water-blocking and acid-resisting properties in a short time, but also basically does not decline in air-blocking, water-blocking and acid-resisting properties after long-time high-temperature operation. R1R2R3SiO [(Me2SiO) a (MeViSiO) b (CH2CH2CH2CH2) c (CH2CH (CH2CH3)) dO] nSiR1R2R3 Formula (1)

A fluorosilicone raw rubber with high isotacticity is provided. In the fluorosilicone raw rubber with high isotacticity, the content of a cis-methyl trifluoropropyl siloxane structure is not less than 20%, and the content of a vinyl siloxane chain link is 0-50%. Compared with traditional fluorosilicone raw rubber, the fluorosilicone raw rubber with high isotacticity prepared by the present disclosure has a higher degree of isotacticity in a molecular chain structure thereof; accordingly, a self-enhancing effect can be obtained by producing microcrystalline particles by means of strain-induced crystallization during stretching of cis fluorosilicone rubber, thereby greatly improving the mechanical properties of fluorosilicone rubber.

The invention discloses a dealcoholization type organic silicon adhesive for an electric kettle and a preparation method of the dealcoholization type organic silicon adhesive. The adhesive provided by the invention comprises the following components in parts by mass: 1000 parts of siloxane-terminated polydimethylsiloxane, 50-250 parts of dimethyl silicone oil, 80-150 parts of a thixotropic agent, 5-15 parts of a water removal agent, 5-10 parts of a coupling agent and 1-5 parts of a catalyst, the coupling agent is selected from at least one of gamma-aminopropyl trimethoxy silane, N-beta-(aminoethyl)-gamma-aminopropyl methyl trimethoxy silane and gamma-glycidyl ether oxypropyl trimethoxy silane; the siloxane-terminated polydimethylsiloxane is prepared by the following steps: firstly, carrying out polymerization reaction on cyclic dimethyl siloxane, vinyl siloxane and a polymerization catalyst; and then carrying out hydrosilylation reaction with hydrogen-containing siloxane and a platinum catalyst. The adhesive provided by the invention can fundamentally and effectively avoid the problem of surface drying performance degradation caused by reversible side reaction during storage, and has relatively short initial surface drying time.

This application relates to the field of rubber sealing ring processing technology, and more specifically, to a highly elastic and fatigue-resistant rubber sealing ring and its preparation method. It is prepared from the following raw materials in parts by weight: 100 parts silicone, 30-50 parts silica, 5-10 parts high-vinyl silicone oil, 4-6 parts vinyl-terminated polyborosiloxane, 5-10 parts vinyl-terminated fluorosilicone oil, 2-4 parts phenyltriethoxysilane, 1-2 parts CeO2@vinylsiloxane core-shell particles, 3-5 parts hydroxyl silicone oil, 5-8 parts methyl silicone oil, 1-3 parts hydrogen-containing silicone oil, and 0.8-1 parts platinum catalyst. The rubber sealing ring prepared by the above formulation exhibits excellent aging resistance, elastic recovery ability, and fatigue resistance. It maintains good sealing contact pressure even under long-term compressive stress and micro-vibration environments, effectively suppressing stress relaxation and permanent deformation. Simultaneously, it effectively delays surface hardening, cracking, and powdering, significantly extending the service life of the sealing ring in medical monitors.

This invention belongs to the field of polymer materials technology and discloses an oil-resistant modified vulcanized silicone rubber and its preparation process. This preparation process introduces fluorinated ester-type dynamic covalent bonds into the crosslinking network. The material is composed of fluorinated vinyl siloxane copolymers, carboxyl-functionalized siloxane oligomers, and fluorinated silanol crosslinking agents, etc., maintaining excellent oil resistance and high / low temperature resistance while endowing the material with self-healing and hot-press reprocessing capabilities. This invention extends the service life of seals under harsh operating conditions; utilizes the reversible thermal response of dynamic bonds to achieve hot-press reprocessing of the material, making thermosetting rubber recyclable; employs in-situ generation of dynamic crosslinking points to ensure the long-term reliability of the material; and maintains mechanical property balance over a wide temperature range, making it suitable for high-end applications such as aerospace engine seals, new energy vehicle battery pack gaskets, and deep-sea oil drilling equipment seals.