45 results about "Orthosilicate" patented technology

The invention provides a dark metal modified lithium orthosilicate-based thermochemical heat storage material as well as a preparation method and application thereof, and belongs to the technical field of energy and material science. The components of the heat storage material comprise lithium orthosilicate and dark metal, the proportion of the dark metal in the heat storage material is 2-10 mol%, and the source of the dark metal comprises one or more of manganese dioxide, ferric oxide, nickel oxide and copper oxide. Metal ions introduced into the obtained dark metal modified lithium orthosilicate-based thermochemical heat storage material have the effects of promoting the ion migration rate and resisting material sintering, and specifically, the heat storage density and the cycling stability of the material are remarkably enhanced. In addition, due to the introduction of the dark metal oxide, the color of the heat storage material is remarkably deepened, the solar spectrum absorptivity is greatly improved, the light absorption performance of the material is greatly enhanced, and the heat storage material has higher photo-thermal conversion efficiency and is more suitable for a concentrating solar energy storage system.

The application provides a modified hollow porous silica microsphere and a preparation method and application thereof. The preparation method of the modified hollow porous silica microsphere comprises the following steps: S1, mixing a pre-hydrolysis solution of orthosilicate, a pre-hydrolysis solution of alkyl trialkoxysilane, a pre-hydrolysis solution of 1,2-bis(trialkoxysilyl)ethane and a polyol to obtain a mixture, refluxing, removing alcohol and obtaining a prepolymer; S2, mixing the prepolymer obtained in the step S1 with water, emulsifying, adjusting pH to alkaline, aging, filtering and drying, and the modified hollow porous silica microsphere is obtained. The application uses 1,2-bis(trialkoxysilyl)ethane as one of main silicon sources, and uses the mode of pre-hydrolyzing different silanes separately and then mixing and condensing, so that the highly hydrolyzable and polymerizable silane is prevented from being highly hydrolyzed and polymerized and the non-hydrolyzable and polymerizable silane is prevented from being hydrolyzed and polymerized, the preparation process is simple, the raw material cost is low, the porous microspheres obtained have good morphology and high yield, the operation condition is mild, and the application is easy to industrialize.

The invention discloses a FeNi soft magnetic composite material based on tetrabutyl orthosilicate hydrolysis coating and a preparation method of the FeNi soft magnetic composite material. According to the method, through a controllable sol-gel process, tetrabutyl orthosilicate is hydrolyzed to generate SiO2 gel, then a uniform and ultrathin SiO2 gel layer is generated on the surface of FeNi powder in situ, and then heat treatment densification is performed to obtain the FeNi soft magnetic composite material coated with SiO2 in an insulation mode. The SiO2 insulating layer is firmly combined with the matrix metal powder, the thermal stability is good, high frequency and high resistivity are achieved, and meanwhile dilution of non-magnetic relative magnetic performance is reduced to a great extent. The final magnetic core is obtained through compression molding and annealing heat treatment, has the excellent characteristics of high effective magnetic conductivity and low high-frequency magnetic core loss, and is particularly suitable for various efficient and miniaturized power electronic devices in the MHz frequency band.

A rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material includes a rhombohedral zinc orthosilicate (Zn2SiO4) phase, a cubic zinc ferrite (ZnFe2O4) phase, and a hexagonal silicon dioxide (SiO2) phase. The rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material exhibits a morphology including spherical microscale particles with an average diameter ranging from 0.8 micrometer (μm) to 1.8 μm and irregular nanoscale aggregates with an average diameter ranging from 50 nanometer (nm) to 110 nm. The rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material has an adsorption capacity for basic fuchsin dye of greater than or equal to 140 milligrams per gram (mg / g). Furthermore, a method for producing the rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material includes calcination of metal precursors.

The application belongs to the technical field of three-proofing glue and specifically relates to three-proofing glue comprising double-cured resin and a preparation method and application thereof. The three-proofing glue comprises, by mass fraction, 35-55 parts of siloxane-modified acrylate oligomer, 5-15 parts of di-functional group hydroxyl-containing polyurethane acrylate resin, 30-60 parts of active diluent and 1-5 parts of photoinitiator. The siloxane-modified acrylate oligomer is obtained by reacting side-chain fluorine-containing epoxy-terminated polysiloxane and acrylic acid to obtain prepolymer A and then reacting the prepolymer A with methyl orthosilicate. The three-proofing glue has excellent adhesion, neutral salt spray resistance, ammonium chloride solution resistance, sodium carbonate solution resistance and mixed gas resistance and can be used for protecting circuit boards and electronic equipment in a chemical plant environment.

The invention discloses a nano-composite cement reinforcing agent with a gradient slow release function and a preparation method thereof, alcohol amine molecules are protonized and stably adsorbed in an interlayer domain of montmorillonite by utilizing an ion exchange effect, and then a multi-component orthosilicate mixed system with different hydrolysis characteristics is adopted to prepare the nano-composite cement reinforcing agent with the gradient slow release function. And carrying out in-situ sol-gel reaction at the inlet and inside of the interlayer channel to form the silicon dioxide composite gel plugging layer with differentiated dissolution characteristics. The cement reinforcing agent prepared by the invention can effectively block interlayer alcohol amine molecules at the initial stage of cement hydration, and then a plugging layer is gradually dissociated according to the composition and structure of the plugging layer and a preset sequence, so that the sequential and controllable release of alcohol amine active ingredients is realized, the defects that a traditional alcohol amine additive is easy to consume too early and the acting time is short are overcome, and the cement reinforcing agent has a good application prospect. The later mechanical property and the volume stability of the cement-based material are obviously improved on the premise of not influencing the working performance of the cement.

The vaporizer comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a vaporizer body, and the left surface of the vaporizer body is fixedly connected with a feeding pipe connector, a heat removal opening, a gas outlet pipe connector and a concave heat preservation shell. The ends, away from the vaporizer body, of the feeding pipe connector, the heat removal opening and the gas outlet pipe connector penetrate into the concave heat preservation shell, the concave heat preservation shell is composed of two transverse heat preservation shell bodies and a longitudinal heat preservation shell body, and openings and sealing assemblies are formed in the front surfaces of the transverse heat preservation shell bodies and the left surface of the longitudinal heat preservation shell body correspondingly. The left surface of the transverse heat preservation shell is fixedly connected with a corrugated heat preservation sleeve, the left end of the corrugated heat preservation sleeve is fixedly connected with a conical sealing sleeve, and the inner wall of the conical sealing sleeve makes close contact with the surface of the guide pipe. Through the structure, the influence of the feeding pipe and the air outlet pipe of the vaporizer on the working effect of the vaporizer is reduced, and the compactness of the pipeline is improved.

This invention relates to an aqueous polyimide / SiO₂ nanocomposite coating and its preparation method. The preparation method of the aqueous polyimide / SiO₂ nanocomposite coating includes: dissolving an aromatic diamine monomer in a system composed of water and an organic base; adding an aromatic dianhydride monomer in batches to react and prepare an aqueous polyamic acid salt solution; adding a silane coupling agent to the aqueous polyamic acid salt solution to react and then adding an orthosilicate ester for in-situ hydrolysis and condensation to prepare an aqueous polyamic acid / SiO₂ nanocomposite coating; coating the aqueous polyamic acid / SiO₂ nanocomposite coating onto a substrate surface, followed by drying and imidization treatment to obtain the aqueous polyimide / SiO₂ nanocomposite coating. The aqueous polyimide / SiO₂ nanocomposite coating of this invention has excellent heat resistance and adhesion properties, and can be widely used in high-temperature protective coatings and electronic packaging fields.

This invention relates to the field of self-cleaning coating materials, and discloses the preparation and application of a nanofiber-confined Fe single-atom self-cleaning coating material. The invention uses wood nanofibers as a carbon-based carrier to obtain nanofiber-confined Fe single-atom materials. The three-dimensional network structure generated during the acidic hydrolysis of methyl orthosilicate enhances the bonding between the nanofiber-confined Fe single-atom materials, nano-silica, and nano-titanium dioxide nanoparticles. After hydrolysis, a diluent is added, and the reaction proceeds to obtain the nanofiber-confined Fe single-atom self-cleaning coating material. This self-cleaning coating material has a simple process, high operability, excellent antistatic properties, superhydrophilicity, and photocatalytic activity. It exhibits excellent anti-fouling potential in self-cleaning coating material applications and has broad application prospects.

The application relates to the technical field of lenses, in particular to a high-temperature-resistant lens and a preparation method thereof. The high-temperature-resistant lens comprises a lens base body and high-temperature-resistant coating layers coated on two sides of the lens base body, the high-temperature-resistant coating layers are coated by high-temperature-resistant coating liquid, and the high-temperature-resistant coating liquid comprises the following components: 100-200 parts of deionized water, 45-60 parts of methyl triethoxysilane, 15-30 parts of isopropyl alcohol, 15-60 parts of ethyl orthosilicate and 20-60 parts of silica sol. Inorganic silica coating layers formed by the combination of ethyl orthosilicate and silica sol are selected for surface modification treatment, due to the effective coating of the silicon film, inorganic coating layers can be formed at two ends of the lens, the inorganic coating layer structure can well resist high-temperature, high-humidity and high-heat environments, and therefore the high-temperature-resistant performance of the lens is improved.

The present invention relates to a nanoparticle that can be used to capture a pollutant, of the type comprising a core made of ferrimagnetic material, the core being covered with a layer of ethyl orthosilicate to which at least one cyclodextrin molecule is covalently attached by a linker comprising a main chain and side chains. Characteristically, the cyclodextrin molecule is linked to a triazole ring attached to the end of the chain of the linker and / or to the end of at least one side chain of the linker.

The invention relates to PBAT (poly (butylene adipate-co-terephthalate)) resin for a full-biodegradable mulching film and a synthesis method thereof. The invention discloses PBAT resin for a full-biodegradable mulching film. The PBAT resin is prepared from the following raw materials: an AA esterification raw material, a PTA esterification raw material and a pre-polycondensation auxiliary agent, the AA esterification raw materials comprise adipic acid, 1, 4-butanediol, a compound catalyst and an auxiliary agent 1; the auxiliary agent 1 is prepared from ethyl orthosilicate and zinc isoocatanoate; the PTA esterification raw materials comprise terephthalic acid, 1, 4-butanediol, a compound catalyst and an auxiliary agent 2; the auxiliary agent 2 is ethyl orthosilicate; the compound catalyst is a titanium phosphorus compound catalyst; the pre-polycondensation auxiliary agent is an antioxidant and aluminum-magnesium hydrotalcite. According to the PBAT resin for the full-biodegradable mulching film and the synthesis method of the PBAT resin, on the basis of an existing PBAT conventional catalytic system, different functional auxiliaries are introduced in different stages, and the mechanical property, the water retention capacity and the hydrolysis resistance of the polymerized PBAT resin are effectively improved through the synergistic effect of the different functional auxiliaries.

The invention discloses a preparation method of high-purity phosphotriester, and belongs to the technical field of organic synthesis. The method comprises the following steps: firstly, cooling, crystallizing and purifying a phosphoric acid raw material, and respectively rectifying and purifying a tetraalkyl orthosilicate raw material and a reaction solvent to obtain a high-purity raw material and a solvent; then mixing high-purity phosphoric acid, high-purity tetraalkyl orthosilicate and a high-purity solvent, and carrying out one-step ester exchange reaction at 180-220 DEG C for 12-32 hours; and finally, carrying out post-treatment on the reaction liquid, and carrying out reduced pressure rectification on the obtained crude product to obtain a high-purity phosphotriester product. A chlorine-free raw material route is adopted from the source, and a deep purification process of a system before and after the reaction is combined, so that the content of arsenic ions in the product is effectively controlled to be 25 ppb or below, the content of chlorine ions is controlled to be 15 ppb or below, and the purity can reach 99.9999% or above. The method has the advantages of simple process, high yield and environmental friendliness, and is especially suitable for the fields with extreme requirements on impurity content, such as new energy batteries, electronic chemicals and the like.

The application discloses a closed loop process for synchronously increasing the value of silicon and fluorine components in silicon tetrafluoride, and belongs to the technical field of fluorine-containing silicon byproduct resource utilization. The steps are as follows: 1) mixing anhydrous alcohol with triethylamine, and introducing silicon tetrafluoride gas at 0-30 DEG C to generate alkyl orthosilicate and triethylamine monohydrofluoride; 2) distilling the reaction liquid to recover alcohol, performing vacuum rectification to obtain alkyl orthosilicate product, and separating to obtain triethylamine monohydrofluoride; 3) adding triethylamine monohydrofluoride into water, and performing heating reflux reaction with inorganic alkali or basic oxide to separate to obtain triethylamine crude product and fluorinated metal salt; 4) after dehydration rectification, the triethylamine crude product is recycled to step 1) with recovered alcohol; and the fluorinated metal salt is post-treated to obtain high-purity fluorinated metal salt. The process has low reaction temperature, high alkyl orthosilicate yield, recyclable triethylamine, all fluorine solidified into high-value-added products, no three-waste emissions, and can be continuously industrialized.

The invention relates to an MWCNTs (multi-walled carbon nanotubes) modified CeO2 / Co hollow nanofiber absorbent and a preparation method thereof. According to the technical scheme, water, ethyl alcohol and ammonia water are mixed to obtain a solution A; mixing orthosilicate and the solution A, stirring, and carrying out solid-liquid separation to obtain SiO2 microsphere template powder; metal salts containing Co < 2 + > ions and Ce < 3 + > ions are sequentially dissolved in an N, N-dimethylformamide solution, and a solution B is obtained; putting SiO2 microsphere template powder into the solution B to obtain turbid liquid; putting polyvinylpyrrolidone powder into the turbid liquid, and stirring to obtain a precursor spinning solution; the preparation method comprises the following steps: mixing a nanofiber precursor obtained through electrostatic spinning with dicyandiamide powder, carrying out a carbon thermal reduction reaction, putting a prepared carbonized substance into a NaOH aqueous solution, stirring, carrying out solid-liquid separation, and drying to obtain the MWCNTs modified CeO2 / Co hollow nanofiber absorbent. The obtained product is high in loss capacity and stable in hollow structure, and decoupling regulation and control of the loss capacity and impedance matching can be achieved.

The invention discloses a cement-based aerogel material and a preparation method thereof, and belongs to the field of functional materials. The cement-based aerogel material comprises the following components in parts by mass: 1-5 parts of a water-based polymer modifier, 1-5 parts of a phase change material, 3-15 parts of a coating material, 1-3 parts of a basic catalyst, 5-10 parts of a foaming agent, 5-20 parts of cement, 1-3 parts of a flame retardant and 5-20 parts of water, the phase change material is paraffin, and the coating material is tetraethyl orthosilicate or tetrabutyl orthosilicate. The preparation method comprises the following steps: (1) mixing polyvinyl alcohol and water, and adding a phase change material and a coating material; (2) adding a basic catalyst, and reacting; (3) adding a foaming agent, cement and a flame retardant to prepare slurry; and (4) pouring the slurry into a mold, and placing the mold in a liquid nitrogen pool for freezing and pore-forming to obtain the cement-based aerogel material. The cement-based aerogel material provided by the invention can achieve the effects of low cost, high strength and excellent heat insulation performance.

The invention discloses a preparation method and application of a composite silane anticorrosive and antibacterial reagent for a metal surface. The reagent comprises two independent solutions, one is a mixed solution of alkylsilane and orthosilicate, and the other is an aminopropyltriethoxysilane solution with a catalytic function. After the two solutions are mixed, a Si-O-Si net structure is generated through silanol bond formation and condensation polymerization, the surface of metal is coated with the Si-O-Si net structure at a time through a brush coating technology, and after curing is conducted for 1 hour at the temperature of 100 DEG C, a compact molecular film with Si-O-Si and Si-O-metallic bonds is formed on the surface of the metal. The film layer can effectively block water and oxygen permeation and remarkably improve the oxidation resistance and corrosion resistance of metal, has the antibacterial capacity and can prevent bacterial adhesion. The preparation technology is simple, the obtained reagent has the advantages of being low in cost, environmentally friendly, stable in performance and the like, and a formed coating is high in adhesive force and lasting in protection effect and can be widely applied to corrosion prevention and antibacterial protection of various metal materials.

The application discloses a grinding aid for producing cement clinker powder and a use method thereof. The grinding aid is composed of 20-27 parts by weight of a mixture of hydrogen peroxide and a polyol, 3-6 parts by weight of ethyl orthosilicate, 1.5-2.4 parts by weight of a solid calcium source, 0.5-0.75 parts by weight of a lignin sulfonate and 1-2 parts by weight of modified calcium stearate. The grinding aid is obtained by mixing the above raw materials and then rapidly stirring and dispersing them. The modified calcium stearate is obtained by mixing calcium stearate with an ethanol solution of a polycarboxylic acid water reducing agent and then performing grinding treatment. The use method comprises the following steps: uniformly spraying the grinding aid on cement clinker, standing, and then performing grinding. The grinding aid can not only reduce the energy consumption in the early stage of grinding and improve the grinding efficiency, but also help to improve the early strength of the prepared cement clinker.

The invention relates to the technical field of permanent magnetic ferrite materials, in particular to a preparation process of permanent magnetic ferrite capable of inhibiting invisible cracks. The preparation method specifically comprises the following steps: adopting citric acid surface modified nano iron red and a strontium-aluminum composite precursor as main materials, introducing yttrium-zirconium composite oxide sol and cerium-silicon hybrid oxide as rare earth additives, and adopting a zinc borate-tetraethoxysilane hydrolysis coating system as a glass phase forming agent. The permanent magnetic ferrite is finally prepared through the steps of proportioning in specific parts by weight, high-energy ball milling, controllable precipitation, spray granulation, programmed aging, atmosphere protection sintering, three-stage gradient cooling and the like. The obtained material has excellent magnetic performance consistency, high mechanical strength and low defect rate, and is especially suitable for manufacturing high-performance energy-saving motor magnetic shoes.

The application provides an ultrafast high-brightness extremely low-fluorescence rare earth orthosilicate scintillation material, a preparation method and application thereof. 2(1‑x‑y‑a) Ce 2x Ca 2y A 2a Si (1‑z) Al z O5,0

The application discloses a method for removing chlorine from orthosilicate. The method comprises the following steps: providing a crude silicate product containing orthosilicate and chloro-orthosilicate; contacting the crude silicate product with a fluorinated salt to make the chloro-orthosilicate undergo a nucleophilic substitution reaction with the fluorinated salt and be converted into fluoro-orthosilicate; and separating the orthosilicate and fluoro-orthosilicate through rectification to obtain a pure orthosilicate product. The method provided by the application can convert chloro-orthosilicate into fluoro-orthosilicate through a substitution reaction with a soluble inorganic fluorinated salt, and convert organic chlorine into inorganic chloride, thus achieving good chlorine removal effect. The newly generated fluoro-orthosilicate has a large difference in boiling point from the product, which is very beneficial to subsequent rectification, and can obtain a pure orthosilicate product with a semiconductor-grade chlorine content. The method does not need to use a large amount of alcohol solvent and flammable treatment agent, is easy to operate, and can reuse the chlorine removal agent, is safe and controllable, has low cost, and is easy to scale up for industrial production.

The present application relates to a primer coating composition comprising at least one resin and at least one silicate. At least one resin comprises at least one acrylic latex, at least one polyurethane dispersion, at least one epoxy resin, an alkali-soluble resin, or combinations thereof. Further, at least one silicate comprises sodium silicate, potassium silicate, magnesium silicate, calcium silicate, lithium silicate, ammonium silicate, orthosilicates, or combinations thereof. The silicate may be added during processing or post-added to the primer coating composition. A method of preparing the primer coating composition described herein and an article comprising the primer coating composition described herein are also provided.

The present invention relates to a method for producing silicate glass from natural silicate rocks. The natural silicate rocks comprise alkalis and earth-alkalis at a level of equal to or greater 5wt%, preferably 10wt%, preferably 15wt%, more preferably 20wt%, even more preferably 25% by weight of the total composition of the natural silicate rocks and comprise at least one metal and / or metalloid elements (M) selected from the group consisting of Fe, Co, Cr, Ni, V, Sb, Zn, Mn, Sn, Bi, Pb, Ag, Cu, W, Nb, Mo and mixtures thereof. The amount of at least one metal and / or metalloid elements (M), is lowered by the method comprising the steps of : a) melting the natural silicate rocks to obtain a silicate melt; b) performing a chemical reaction to reduce the silicate melt to precipitate a metal phase enriched in the metal and / or metalloid elements; c) separating at least a part of the metal phase from the silicate melt to obtain a purified silicate melt; d) preferably, performing an oxidation treatment on the purified silicate melt to obtain a highly purified silicate material; and e) using the purified silicate melt and / or preferably the highly purified silicate material, as component for silicate glass.

The invention discloses a sodium orthosilicate-based pressure swing carbon adsorption-in-situ conversion integrated system and method, and relates to the field of carbon capture and carbon monoxide preparation, and the method comprises the following steps: introducing industrial flue gas containing carbon dioxide and sodium orthosilicate into the system; the method comprises the following steps: in a high-temperature reactor, directionally capturing carbon dioxide in industrial waste gas by virtue of a sodium orthosilicate adsorbent to generate a Na2CO3-Na2SiO3 compound, and outputting CO2-free purified gas; afterwards, working conditions are switched at an isothermal temperature, carbon monoxide and biochar are introduced, trapped carbon dioxide is converted into carbon monoxide with the purity close to 100% in situ through the synergistic effect of a Na2CO3-Na2SiO3 compound and the biochar, and regeneration of the sodium orthosilicate adsorbent is synchronously achieved in the conversion process; the regenerated sodium orthosilicate and industrial flue gas are introduced into the reactor again, the steps are repeated, and a continuous circulation system of carbon capture-conversion-adsorbent regeneration is constructed. Through pressure swing adsorption-in-situ conversion integrated design, resource utilization of carbon dioxide in industrial waste gas is realized.

The application provides a cross-linking curing agent for dealcoholized silicone sealant and a preparation method thereof, the cross-linking curing agent comprises the following components in parts by weight: 55-75 parts of polymethyl triethoxysilane, 15-35 parts of orthosilicate, 1-2 parts of amino alkoxy silane, 4-6 parts of secondary amino bis trialkoxy silane, 1-2 parts of epoxy trialkoxy silane, 1.4-1.7 parts of acetyl ethyl acetate, 0.1-0.2 parts of anhydrous nickel chloride and 0.1-0.5 parts of organic tin catalyst. The cross-linking curing agent has the dual functions of traditional cross-linking agent and coupling agent, and has high stability and high performance. When applied to two-component alcohol type glue and alcohol type transparent glue, the preparation process of replacing alkoxyl-terminated 107 with conventional hydroxyl-terminated 107 can be realized, good storage period and preferable mechanical properties are ensured, and the final production, performance and cost are greatly optimized.

The application discloses a corrugated plate SCR denitration catalyst substrate and a preparation method and use method thereof. The corrugated plate SCR denitration catalyst substrate is mainly composed of a glass fiber plate and a substrate coating slurry. The substrate coating slurry comprises the following component raw materials in a weight content: butyl titanate 20-55%, ethyl orthosilicate 10-40%, silica sol 5-25%, polyvinyl alcohol 1-10%, anhydrous ethanol 10-40% and deionized water 5-20%. The corrugated plate SCR denitration catalyst substrate has strong scouring resistance, and after coating of active substances, the active substances are not easy to fall off, the fastness of the catalyst active substances on the substrate can be improved, the service life of the catalyst is prolonged, and the stable operation of the device for a longer time is ensured.

This invention relates to the field of photothermal anti-icing and de-icing technology, and discloses a tellurium nanowire / modified diatomaceous earth composite photothermal superhydrophobic anti-icing coating, its preparation method, and its application. The method includes: (1) mixing diatomaceous earth, an alkali-alcohol mixture, water, a fluorinated modifier, and an alkyl orthosilicate, stirring, then allowing it to stand and undergo solid-liquid separation to obtain fluorinated diatomaceous earth powder; (2) mixing tellurium nanowires, fluorinated diatomaceous earth powder, and an epoxy resin-containing solution, stirring to obtain an anti-icing and de-icing coating system, spraying the anti-icing and de-icing coating system onto the surface of a substrate, and curing. This solution disperses tellurium nanowires and perfluorinated diatomaceous earth in epoxy resin to form a composite photothermal superhydrophobic coating composed of tellurium nanowires, modified diatomaceous earth, and epoxy resin. The combined structural features and functional advantages of this coating give it significant application potential in the fields of anti-icing and de-icing.

The invention relates to an MS sealant and a preparation method thereof. The MS sealant is prepared from the following raw materials in parts by mass: 80 to 95 parts of silane-terminated polyether resin, 5 to 20 parts of modified resin, 20 to 50 parts of a plasticizer, 2 to 4 parts of a stabilizer, 100 to 150 parts of filler, 5 to 10 parts of hydrophobic fumed silica, 4 to 5 parts of a water removal agent, 2 to 5 parts of a silane coupling agent and 0.8 to 1 part of a catalyst. The modified resin is prepared from the following raw materials in parts by weight: 73-128 parts of a modifier and 90-100 parts of hexafluorobisphenol A, the modifier comprises one or a mixture of more of tetramethyl orthosilicate, ethyl orthosilicate and methyltrimethoxysilane. The self-made fluorine-silicon-containing modified resin is introduced, and the low surface energy and hydrophobic characteristics of a fluorocarbon chain segment are utilized, so that the overall hydrophobicity of the MS sealant is remarkably improved.

In a supported composite oxide catalyst and preparation and use thereof, the catalyst has the general formula: FeMoaSibXcOd, wherein X is a modified metal and is selected from alkali metals or alkaline earth metals; a=0.5-5, b=10-50, c=0.001-0.1, and d is the amount of oxygen element satisfying the chemical valence. The catalyst is prepared with the following method: (i) providing an acidic aqueous solution of a surfactant; (ii) dissolving an iron-containing compound and a complexing agent in the acidic aqueous solution, adding tetra C1-4 alkyl orthosilicate, and performing hydrolysis, crystallization and calcination to obtain a precursor; and (iii) forming a mixed liquid of the precursor, a molybdenum-containing compound and a modifying metal compound, drying same and calcinating the resultant, so as to obtain the supported composite oxide catalyst.

The application discloses a weather-resistant chlorinated polyethylene rubber composition and a preparation method thereof, and belongs to the technical field of chlorinated polyethylene rubber compositions. The preparation method of the weather-resistant chlorinated polyethylene rubber composition comprises the following steps: preparing hybrid modified chlorinated polyethylene rubber, premixing, mixing and vulcanizing. The hybrid modified chlorinated polyethylene rubber is prepared by mixing distilled water, sodium dodecyl benzene sulfonate and chlorinated polyethylene rubber powder, stirring at normal temperature, continuously stirring, dropwise adding methyl orthosilicate, dropwise adding an aqueous solution of magnesium chloride hexahydrate after the dropwise adding of the methyl orthosilicate is completed, adjusting the pH value to 12.8-13.2 after the dropwise adding of the aqueous solution of magnesium chloride hexahydrate is completed, stirring at 68-72 DEG C, filtering, washing the filter residue, and vacuum drying. The chlorinated polyethylene rubber composition prepared by the method has good weather resistance, high tear strength and tensile strength, and good heat air aging resistance.