64 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 invention discloses high-temperature-resistant silicone rubber and a preparation method thereof, and belongs to the field of polymer compositions. The silicone rubber is composed of vinyl-terminated polydimethylsiloxane, fumed silica, hydroxyl silicone oil, a hydrogen-containing silicone oil cross-linking agent, a platinum catalyst, an inhibitor methyl butynol, cerium oxide and zinc oxide whiskers. During preparation, vinyl siloxane and 1 / 2 of white carbon black are subjected to vacuum banburying for 40 min at the temperature of 155 DEG C, the remaining white carbon black and hydroxyl silicone oil are added to be mixed for 50 min at the temperature of 125 DEG C, other components are sequentially added after cooling, and vulcanization is conducted at the temperature of 170 DEG C * 15 MPa. The shore A hardness of the obtained silicone rubber is greater than or equal to 63, the retention rate of elongation at break is greater than or equal to 485%, the retention rate of tensile strength after aging at 350 DEG C for 72 hours is greater than or equal to 86%, the thermal weight loss is 5%, the temperature is greater than or equal to 476 DEG C, the Mooney viscosity is less than or equal to 47, and the silicone rubber has excellent processability and high-temperature stability.

The invention discloses a preparation method and application of a nano heat-insulating metal oxide composite coating. The preparation method comprises the following steps: preparing a nano ATO crystal of which the surface contains silicon hydroxyl; preparing polymerizable ATO (antimony tin oxide) nano particles; and uniformly mixing the polymerizable ATO nano particles, the silane modified nano silicon dioxide, the self-emulsifying polyurethane emulsion and the auxiliary agent to obtain the required coating. Nanometer ATO crystallization and surface silicon hydroxyl modification are synchronously completed in a hydrothermal environment, and the problem of uneven coating caused by traditional two-step modification is solved; after the high-temperature reaction, cold ethanol is used for realizing shock cooling to stop crystal growth, so that the problem of thermodynamic instability of the nanocrystalline is solved; the interfacial compatibility is improved by introducing a vinyl-containing siloxane monomer; by compounding the polymerizable ATO nano particles, the silane modified nano silicon dioxide, the self-emulsifying polyurethane emulsion and the auxiliaries, a stable topological structure connected by covalent bonds is constructed, and the aging resistance, the heat insulation property and the adhesive force of the coating are remarkably improved.

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.

The invention relates to a preparation method of supported porous carbon for catalyzing hydrosilylation reaction, which comprises the following steps: (S1) mixing thermoplastic phenolic resin, polyindole boric acid and a stabilizer, and heating to react to obtain modified phenolic resin; the mass ratio of the thermoplastic phenolic resin to the polyindole boric acid is 100: (15-25); (S2) dissolving the modified phenolic resin, a pore-foaming agent and a curing agent in a solvent, removing the solvent, and crushing to obtain solid particles; (S3) carrying out thermocuring, pre-oxidation, carbonization, activation and oxidation treatment on the solid particles in sequence to obtain oxidized porous carbon; (S4) modifying the oxidized porous carbon with vinyl siloxane to obtain vinyl siloxane modified porous carbon; and (S5) dipping the vinyl siloxane modified porous carbon in an alcoholic solution of platinum salt to obtain the supported porous carbon. The supported porous carbon prepared by the invention has excellent catalytic efficiency and good stability when being used for catalyzing hydrosilylation reaction, and can be recycled.

The application discloses a platinum complex with controllable activity and a preparation method and application thereof, which is formed by coordination of vinyl siloxane, modified ligand and chloroplatinic acid; the modified ligand is prepared by reaction of maleic anhydride, allylamine and hydroxymethyl dimethyl phosphite. The application introduces amide groups and phosphite groups into the molecular chain of maleic anhydride, uses the groups as coordination compounds to coordinate with vinyl siloxane and platinum, and can improve the normal-temperature storage stability of the platinum catalyst while still keeping high catalytic activity of the platinum catalyst on the hydrosilylation reaction; when the platinum complex is used for catalyzing preparation of addition-type liquid silicone rubber, no inhibitor needs to be added, and the silicone rubber has good mechanical properties.

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 two-component high-thermal-conductivity gel and a preparation method thereof, and belongs to the technical field of thermal interface materials, and the key point of the technical scheme is that the two-component high-thermal-conductivity gel comprises a component A and a component B, the component A is prepared from the following raw materials in parts by mass: 90 to 110 parts of phenyl vinyl siloxane, 2 to 4 parts of fluorinated silicon oil, 4.5 to 6 parts of hydrogen-containing silicone oil, 1700 to 1900 parts of heat-conducting filler, 8 to 12 parts of surfactant and 0.1 to 0.3 part of inhibitor; the component B is prepared from the following raw materials in parts by mass: 90 to 110 parts of phenyl vinyl siloxane, 2 to 4 parts of silicon fluoride oil, 1700 to 1900 parts of heat-conducting filler, 8 to 12 parts of surfactant and 1 to 3 parts of catalyst. According to the invention, through crosslinking density control and design of the interface controllable stripping layer, good balance between heat-conducting property and easy stripping property is realized, and the application reliability and the service life of the gel are obviously improved and prolonged.

The application provides a kind of light-heat dual-curing multi-hybrid coating, coating, its preparation method and application. The light-heat dual-curing multi-hybrid coating includes, by mass fraction: polybutadiene epoxy resin 5.0-15.0 parts, polyol polymer 10.0-20.0 parts, filler 3.0-9.0 parts, active diluent 40.0-60.0 parts, blocked isocyanate resin 2.0-8.0 parts, liquid latent epoxy accelerator 0.2-0.3 parts, vinyl siloxane 0.5-2.0 parts, and photoinitiator 3.0-6.0 parts. The coating formed by the coating provided by the application has good adhesion and exhibits excellent insulation and protection performance; the coating requires short curing time and can be quickly cured under light-heat dual-curing conditions.

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 relates to the technical field of fabrics, and discloses a thermal-insulation down jacket fabric and a preparation process thereof. Hollow mesoporous titanium dioxide, 3-(dimethyl vinyl siloxane) glutaric acid, an acrylate monomer, an initiator and the like are subjected to a reaction to obtain a titanium dioxide-polyacrylate finishing liquid; and then carrying out two-time dipping and two-time rolling, pre-drying and baking on the down jacket fabric to obtain the heat preservation down jacket fabric. The hollow mesoporous titanium dioxide is uniformly dispersed in the polyacrylate film matrix, so that heat transfer can be prevented, the heat conductivity coefficient of the down jacket fabric is reduced, and good heat preservation and heat insulation performance is achieved. The polyacrylate finishing liquid contains flexible siloxane groups, so that a polyacrylate film is endowed with good flexibility, and the wrinkle recovery angle and the wrinkle resistance of the down jacket fabric are improved.

The invention discloses a core-arm structure synthesis method of polyfunctional group-terminated vinyl silicone oil, and belongs to the field of functional organosilicon polymer synthesis. The method comprises the following three core processes: preparing a polyvinyl POSS core polymer through active anionic polymerization under anaerobic and anhydrous conditions; initiating double-bond metallization by using lithium alkylide to generate a multifunctional macromolecular initiator; vinyl-terminated siloxane monomers are added for polymerization to form a star-shaped structure with POSS as a core and silicone oil chain segments as arms, and the performance can be optimized through block extension and purification processes. Parameters such as initiator proportion, reaction temperature and time are regulated and controlled through a quantitative formula, and the problems of uneven structure, low bonding efficiency and the like of a traditional method are solved. The product molecular weight distribution PDI is smaller than or equal to 1.2, the bonding efficiency is larger than or equal to 95%, the vinyl density is improved by 3-5 times, the process is mild, the performance can be customized, and the method is suitable for multiple fields of sealants, pouring sealants and the like.

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.