433 results about "Methyl silicone" patented technology

The invention belongs to the technical field of marine organism fouling protection, and particularly discloses a self-repairing coating for preventing biological fouling and a preparation method and application thereof, and the preparation method comprises the following steps: S1, adding polydimethylsiloxane and aliphatic diisocyanate into an organic solvent according to a molar ratio of 1: (1.0-3.0), continuously stirring for more than 0.5 h, and standing to prepare an organosilicon polymer solution; the polydimethylsiloxane is aminopropyl double end capped polydimethylsiloxane, and the polydimethylsiloxane is an aminopropyl double end capped polydimethylsiloxane; s2, adding methyl silicone oil into the organic silicon polymer solution, and continuously stirring for more than 0.5 hour to prepare a transparent organic silicon prepolymer; and S3, uniformly coating the surface of a substrate with the prepolymer prepared in the step S2, and standing to obtain the self-repairing coating for preventing biological fouling. Complete covering and damage self-repairing of a lubricating layer on the surface of the coating can be achieved, attachment and growth of fouling organisms are effectively prevented, and the coating is endowed with long-acting antifouling performance.

The invention relates to the technical field of foaming materials, and particularly discloses a silicone rubber foaming material and a preparation method thereof. The silicone rubber foaming material is prepared from the following raw materials in parts by weight: 1-60 parts of hydroxyl silicone oil, 10-60 parts of vinyl silicone oil, 1-15 parts of hydrogen-containing silicone oil, 1-5 parts of methyl silicone oil, 0.5-1 part of an inhibitor, 0.25-0.5 part of a platinum catalyst, 5-15 parts of modified polysiloxane and 10-30 parts of white carbon black. The invention also provides a preparation method of the composition. Compared with the prior art, the silicone rubber foaming material prepared by the invention does not contain halogen and other harmful substances, does not cause secondary pollution in a combustion process, and can realize efficient balance of mechanical properties and flame retardant properties.

The invention discloses a wear-resistant high-gloss nano liquid, a wear-resistant high-gloss ceramic tile and a preparation method of the wear-resistant high-gloss ceramic tile, and belongs to the technical field of ceramic manufacturing. The wear-resistant high-gloss nano liquid at least comprises a component A, a component B and a component C which are independently subpackaged, wherein the component A comprises large-particle silica sol, boric acid, sodium methyl silicate, carboxymethyl cellulose sodium, a boronizing stabilizer and the balance of water; the component B comprises a boronizing stabilizer and the balance of water-based modified silicone oil; and the component C is wax emulsion. Through systematic material and process innovation, the ceramic tile which is high in gloss, strong in antifouling property, durable in wear resistance and high in transportation performance is prepared, and the market requirements of surface treatment materials which are high in performance, low in cost and easy to transport are met.

The invention discloses geopolymer cement based on coal gangue activation reaction as well as a preparation method and application thereof, and relates to the technical field of building materials. The invention relates to a coal gangue concrete, which is prepared from the following raw materials in percentage by mass: 50 to 70 percent of activated coal gangue powder, 5 to 15 percent of alkali activator, 10 to 30 percent of auxiliary cementing material and water, wherein the water accounts for 30 to 40 percent of the total mass of the activated coal gangue powder, the alkali activator and the auxiliary cementing material. Through a composite activation process of medium-temperature calcination decarburization and superfine grinding, the activity of silicon-aluminum components in the coal gangue is effectively excited, the reaction efficiency is remarkably improved, the mixing amount of the coal gangue reaches 50%-70%, the resource utilization rate of solid waste is greatly increased, and efficient activation and resource utilization of the coal gangue are achieved. By adopting the methyl sodium silicate and sodium silicate composite activator, the reaction rate and the product structure are regulated and controlled, and the workability and the setting and hardening behaviors of slurry are improved, so that the obtained geopolymer cement has relatively high early and later strength and excellent durability.

The invention provides a water-resistant building gypsum-based material and a preparation method thereof. The material comprises a building gypsum base body, a hydrophobic film is cured on the surface of the building gypsum base body, and the hydrophobic film is formed by curing waterproof liquid; the building gypsum base body is prepared from four components including desulfurized building gypsum, blast furnace slag, calcium oxide and water, the water-binder ratio is 0.5-0.6, the mass ratio of the blast furnace slag to the desulfurized building gypsum is (1-5): (5-9), and the mass of the calcium oxide is 2%-10% of that of the blast furnace slag; the waterproof liquid comprises water, sodium methyl silicate, tetraethoxysilane, dimethyl silicone oil, sodium hydroxide and sodium silicate. According to the preparation method, a proper waterproof treatment mode is selected according to the size of a workpiece. The blast furnace slag and the calcium oxide are introduced into the desulfurized building gypsum formula, the calcium oxide can effectively excite the activity of the blast furnace slag in a building gypsum matrix, so that the water resistance of a building gypsum-based material is improved, the water resistance of the material is further improved by the waterproof liquid, and meanwhile, the material is endowed with hydrophobicity.

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

The application relates to the technical field of building materials, and discloses a permeable crystalline self-healing waterproof material for concrete self-waterproofing, which is prepared from the following raw materials in parts by weight: 20-30 parts of sodium-based bentonite, 20-50 parts of sodium methyl silicate, 4-6 parts of a penetrating agent, 8-12 parts of a sulphoaluminate cement, 15-18 parts of a silicone zirconium, and 2-5 parts of a complexing agent; the complexing agent is composed of 2-[3-(4-pentylphenyl)prop-2-enylamino]benzoic acid and sodium ethylenediaminetetraacetate. The above technical scheme solves the problem of low mechanical performance and waterproofness of concrete in the prior art.

The invention relates to the technical field of waste gas treatment, and particularly discloses waste gas treatment liquid for treating large-air-volume low-concentration waste gas through a water-based method. The waste gas treatment liquid for treating the large-air-volume low-concentration waste gas through the water-based method comprises a surfactant, a defoaming agent, a dissolution accelerant and water. Wherein the surfactant can be selected from any one or more of polyoxyethylene alkyl ether, polyoxyethylene alkyl ether and polyoxyethylene fatty acid ester; the dissolution accelerant can be selected from any one or more of ethylene glycol monobutyl ether, diethylene glycol monobutyl ether and triethylene glycol monobutyl ether; the defoaming agent is any one or more of butanol, dimethyl silicone oil, silicone and polyether modified polysiloxane. When the waste gas absorption liquid obtained in the invention is used for treating waste gas, the absorption efficiency of methanol, butanol, benzene, toluene, xylene, ethyl acetate, dichloromethane and acetone is obviously improved, and the absorption efficiency of the waste gas absorption liquid on aromatic hydrocarbon, halogenated hydrocarbon, alcohol, ketone and ester pollutants is improved.

The invention relates to a siloxane polycarbonate rare earth modified composite material and a preparation method thereof. Polymethylsiloxane microspheres are prepared through a one-step hydrolysis-polycondensation method, a CeO2 coated PMSQ core-shell structure is constructed in combination with a chemical precipitation technology, uniform dispersion of cerium oxide nanoparticles is achieved, and the problems of agglomeration and interfacial compatibility of traditional CeO2 nanoparticles are solved. The tensile strength of the prepared composite material reaches 33 MPa, the ultraviolet absorption rate reaches 80% after 8 h, the limit oxygen index is 28.5%, and the flame retardant property reaches the V-1 level. The method is suitable for the fields with high weather resistance requirements, such as new energy automobiles and photovoltaics.

The invention belongs to the technical field of cosmetics, and particularly discloses a freeze-dried powder base solution and a preparation method thereof. The freeze-dried powder base solution comprises a component A and a component B. The component A is prepared from magnesium potassium fluosilicate, a filling agent, lauroyl lysine, titanium dioxide, CI 77492, CI 77491, CI 77499 and the balance water, butanediol, xanthan gum, a thickening agent, trehalose, polysorbate-60, an emulsifying agent a, phenyl polytrimethylsiloxane, isononyl isononanoate and a preservative. The component B is prepared from the following components: the balance of water, butanediol, a preservative, magnesium sulfate, an emollient, disteardimonium hectorite, phenyl polytrimethylsiloxane, isododecane, trimethylsiloxy silicate ester, an emulsifier b and PEG-10 (Polyethylene Glycol) polydimethylsiloxane. Various raw materials are mixed, so that the obtained liquid foundation has relatively good dispersity, has smooth and refreshing skin feeling, and is prevented from being thick, sticky and greasy.

The invention discloses a low-damping PVC-U electrical conduit and a processing technology thereof, and belongs to the technical field of conduit preparation. The low-damping PVC-U electrical conduit is prepared from the following components in parts by weight: 70 to 80 parts of PVC resin, 30 to 42 parts of light calcium carbonate, 8 to 15 parts of ethylene-vinyl acetate copolymer, 0.5 to 1 part of ethylene bis stearamide, 3 to 6 parts of epoxy compound and 4 to 7 parts of compound stabilizer, the preparation method comprises the following steps: preparing an epoxy compound from ethyl benzoylacetate, 2-(trimethylsilyl) phenyl trifluoromethane sulfonate, p-toluenesulfonyl azide, p-aminophenol, p-toluenesulfonyl chloride, iodobenzene diacetic acid and rhodium diacetate as raw materials, and preparing the compound stabilizer from 2-(2-aminoethoxy) ethanol, 4-fluorophenol and xylene alkane diisocyanate as raw materials. The PVC-U electrical conduit prepared from the substances has the advantages of low damping, excellent stability, excellent mechanical property and excellent aging resistance.

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

The invention relates to a medical organic silicon pressure-sensitive adhesive with antibacterial performance and a preparation method thereof, and the preparation method comprises the following steps: firstly mixing 2-5 parts of a surfactant and 0.5-1.5 parts of an antibacterial group, and then uniformly stirring at 2000-2500rpm; and adding a mixture of 10-20 parts of methyl vinyl silicone rubber, 0.5-2 parts of hydrogen-containing silicone oil, 40-50 parts of a solvent, 5-20 parts of vinyl MQ silicon resin, 20-35 parts of methyl MQ silicon resin, 0.04-0.4 part of a platinum catalyst and 0.03-0.3 part of an inhibitor into the reactor, and stirring for 4-6 hours to prepare the medical organic silicon pressure-sensitive adhesive with the antibacterial property. The medical organic silicon pressure-sensitive adhesive with the antibacterial property, prepared by the method, has good antibacterial property and cohesiveness, and is simple in process, high in production efficiency, low in cost and convenient to popularize and apply.

The invention provides a fire-retardant coating and a preparation method thereof, belonging to the technical field of coatings. The coating comprises components such as organosilicon-modified epoxy resin, ammonium polyphosphate, melamine cyanurate, modified carbon nanotubes, cage-type silsesquioxane, zirconium boride-modified MOF-808, modified nano-magnesium hydroxide, rutile titanium dioxide, mica powder, vinyl polydimethylsiloxane-polymethylsiloxane silsesquioxane cross-linked polymer, methylsilanol-silicate cross-linked polymer, dimethylthiotoluenediamine curing agent, etc. The modified carbon nanotubes are carbon nanotubes modified by polyoxyethylene fatty acid esters, and the modified nano-magnesium hydroxide is nano-magnesium hydroxide modified by stearic acid. The components are used in combination to have good fire resistance, long fire resistance time, good weather resistance, and long-term performance is not likely to be greatly reduced.

The invention discloses high-durability quick-hardening concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is prepared from the following raw materials: aluminoferrite cement, vitreous calcium aluminate clinker, a coagulant nucleation agent, a nano hybrid siliceous material, a calcium-magnesium composite expanding agent, a self-healing agent, a hydration heat regulating agent, a water reducing agent, an early strength agent, a defoaming agent, a thickening agent, a retarder, an air entraining agent and aggregate. The coagulating nucleating agent is prepared from semi-hydrated gypsum, ferrous sulfate and aluminum potassium sulfate; the nano hybrid siliceous material is prepared by reacting acidic silica sol with sodium methyl silicate at 40-60 DEG C for 1-3 hours. According to the high-durability quick-hardening concrete and the preparation method thereof, the iron aluminate cement, the vitreous calcium aluminate clinker, the coagulant nucleation agent, the nano hybrid siliceous material, the calcium-magnesium composite expanding agent, the self-healing agent and the hydration heat regulating agent are utilized to form a brand-new high-durability and high-adaptability quick-hardening system. The mechanical property, the volume stability and the durability are comprehensively superior to those of the traditional quick-hardening concrete.

A method for preparing methyl silicone resin for high-temperature mica boards includes: (1) Solution A is a mixture of methyltrimethoxysilane, dimethyldimethoxysilane, and epoxysilane coupling agent, which account for 87%-95%, 3%-7%, and 2%-6% of the total amount of A, respectively; (2) Adding 0.5-1.0 times the amount of benzene solvent, 0.2-0.3 times the amount of isopropanol, and adding 0.5%-1% of the total amount of A acidic catalyst to obtain solution B; (3) Heating B to 70℃-80℃, and uniformly adding deionized water, and adding... The time is controlled at 2-3 hours. After the addition is completed, continue stirring for half an hour to obtain solution C. The amount of deionized water is 40%-50% of the total amount of A. (4) Transfer C to a separatory funnel and let it stand to separate into layers. The lower layer of methanol solution is purified by distillation, and the upper layer of silanol solution is washed with water until neutral to obtain solution D. (5) Heat D and reflux for condensation reaction. Maintain the temperature at 130℃-140℃ for half an hour, then cool to room temperature and add benzene solvent to form a 50%-60% concentration of methyl silicone resin for high-temperature mica boards. The benzene solvent content is 40%-50%. It is environmentally friendly, has a simple process, excellent bending resistance, and good moisture resistance.

The invention relates to a preparation method of a hydrolysis modified organic silicon high-temperature-resistant anticorrosive coating, and belongs to the technical field of anticorrosive coatings. The preparation method comprises the following steps: heating 1, 1 '-bis (dimethylsilyl) ferrocene, methylbenzene, chloroplatinic acid, 2, 2, 3, 3, 4, 4, 4-heptafluorobutyl acrylate and bis-(2-methylallyl) cyclooctyl-1, 5-diene ruthenium, and reacting to obtain an intermediate product 1; weighing methyltrimethoxysilane, phenyltrimethoxysilane and the intermediate product 1, uniformly stirring and mixing, slowly dropwise adding diluted hydrochloric acid, hydrolyzing, and heating to react, so as to obtain modified silicon resin; adding the modified silicon resin into petroleum ether, and adding silicone oil, an organic tin catalyst, a bis-ammonia coupling agent, filler and a curing agent to obtain the anticorrosive paint.

A hydrosilylation-curable composition contains the following components: (a) hydroxyl-functional polyorganosiloxane gum; (b) alkenyl-functional polyorganosiloxane gum; (c) optionally, tetraalkoxysilane; (d) trimethylsilyl-capped MQ resin; (e) hydrosilylation inhibitor; (f) silylhydride-functionals crosslinker at a concentration sufficient to achieve a molar SiH / alkene ratio in the hydrosilylation-curable composition that is in a range of 10-200; (g) platinum hydrosilylation catalyst at a concentration sufficient to provide 0.1 to 200 mass parts platinum per million mass parts of hydrosilylation-curable composition; (h) optionally, non-functional trimethylsilyl-capped polydimethylsiloxane gum; and (i) solvent; wherein the combined concentration of components (a) and (c) is in a range of 7 to 20 mass-percent relative to the combined concentration of components (a) through (h).

The invention provides a preparation method of high-selectivity single-ended vinyl silicone oil, which comprises the following steps: adding a hydroxyl-terminated polydimethylsiloxane linear body into low-viscosity dimethyl silicone oil, uniformly mixing, adding linear phosphonitrile chloride for catalysis, and vacuumizing to remove water; continuously raising the temperature, adding a viscosity reduction catalyst, mixing a tetramethyl divinyl disiloxane double-end sealing agent, a dimethyl vinyl ethyoxyl silane single-end sealing agent and low-viscosity dimethyl silicone oil, dropwise adding the mixture into the reaction kettle, keeping the temperature, balancing, vacuumizing, and further removing water; then adding a hexamethyldisilazane neutralizing agent to carry out neutralization treatment; and after the neutralization is completed, entering a low-boiling-point removal process, carrying out reduced pressure distillation to remove low-boiling-point substances, and thus obtaining single-end vinyl polydimethylsiloxane. The single-ended vinyl silicone oil is applied to mold silica gel of liquid silicone rubber and can replace low-viscosity dimethyl silicone oil, the product hardness is adjusted, the oil seepage rate of the silicone oil is reduced, and the oil seepage phenomenon commonly existing in the industry is improved.

The invention discloses a resin composition, conformal coating and application thereof. The resin composition comprises the following raw materials: organic silicon resin, silicone oil, an adhesion promoter and a solvent. The organic silicon resin comprises at least one of methyl silicon resin, phenyl silicon resin, methyl vinyl silicon resin, methyl phenyl silicon resin or methyl hydrogen silicon resin; the silicone oil comprises at least one of methyl silicone oil, hydroxyl silicone oil, vinyl-terminated silicone oil, phenyl silicone oil, methyl phenyl silicone oil or hydrogen-terminated silicone oil; the mass ratio of the organic silicon resin to the silicone oil is (1.7-5): 1. Specific organic silicon resin is adopted as a film-forming framework material and combined with specific silicone oil, the specific organic silicon resin and the specific silicone oil are compounded according to a certain mass ratio, the internal stress and hardness of a film layer can be effectively improved, the compactness and the protection effect of the film layer are improved, and the resin composition which is low in internal stress, soft in film layer and high in curing speed is obtained and can be used for preparing conformal coating. And a good protection effect is achieved in electronic products such as printed circuit boards and the like.

The application discloses a kind of flame-retardant mildew-proof prepolymer, transparent flame-retardant mildew-proof silicone sealant and preparation method thereof.The flame-retardant mildew-proof prepolymer is prepared from raw materials including the following components by weight: mildew-proof agent 0.5-10 parts, flame retardant 20-50 parts, tackifier composition 0.2-2 parts;The tackifier composition is composed of alkyl acetoacetate, trimethylsilyl ethyl acetate, 3-isocyanate propyl trimethoxysilane and polyether silicone oil.The transparent flame-retardant mildew-proof silicone sealant is prepared from raw materials including the following components: alkyl alkoxy-terminated polydimethylsiloxane, white carbon black, the flame-retardant mildew-proof prepolymer, crosslinking agent, catalyst, coupling agent.The transparent flame-retardant mildew-proof silicone sealant prepared by the application not only has very high transparency, but also has excellent flame-retardant effect, long-lasting mildew-resistant and antibacterial properties, and good bonding stability and mechanical strength.

The invention relates to the field of glass detection, and particularly discloses a method for testing the content ratio of ferrous iron to ferric iron in glass. The method specifically comprises the following steps: washing a to-be-detected glass sample, grinding into micro powder, drying, respectively taking the same amount of glass micro powder, and marking as a sample 1 and a sample 2; divalent iron can be converted into ferric iron by adding perchloric acid into the sample 1, and the test result is the content of total iron in the glass. And dimethyl silicone oil is added into the sample 2 so as to isolate air and prevent ferrous iron from being oxidized into ferric iron in the testing process to influence the experiment result. According to the method, the proportion of Fe < 2 + > to Fe < 3 + > in an unknown glass sample can be simply and quickly obtained, the result is accurate and reliable, the test period is short, and the working efficiency is greatly improved.

This invention relates to a polyurethane-modified silicone protective material for the outer wall of wind turbine towers, and discloses a method for preparing the same material. The material is prepared by mixing acrylate-hedged phenol-modified trimethyl silicone oil, isocyanate-modified polyether polyol polyurethane, ultrafine silica, nano-alumina, short-fiber glass, triethylamine, benzoyl peroxide, dioctyl phthalate (DOP), phthalocyanine UV absorbers, dibutyltin diethylene (DDBT), and imidazole antifungal agents in a specific weight ratio. This material exhibits excellent weather resistance, mechanical strength, heat resistance, UV resistance, and antifungal properties, making it particularly suitable for the protection of wind turbine towers. The preparation method ensures the stability and consistency of the material's performance by precisely controlling the proportions of each component and the curing conditions. This material effectively improves the UV resistance, corrosion resistance, weather resistance, and overall durability of wind turbine towers, extending their service life and reducing maintenance costs. This invention provides a high-performance protective material for the outer wall of wind turbine towers, which has significant engineering application value. Especially in environments with long-term high humidity, low temperature, and strong ultraviolet radiation, it can significantly improve the stability and service life of the tower. This polyurethane-modified silicone protective material exhibits excellent protective performance in demanding application environments such as wind turbine towers, and has broad market application prospects.

The invention belongs to the technical field of file repair and protection, and relates to a mildew spot masking and image recovery method and application for a mildewed black-and-white photographic negative film, and the method comprises the following steps: S1, carrying out dust blowing, cleaning and airing pretreatment on the mildewed black-and-white photographic negative film; s2, laying the pretreated mildewed black-and-white photographic film on a glass plate, and then dripping methyl silicone oil on the surface of one side of the mildewed black-and-white photographic film; turning over the mildewed black-and-white photographic film, and dripping methyl silicone oil on the surface of the other side of the mildewed black-and-white photographic film; and covering a layer of glass plate on the mildewed black-and-white photographic film, and standing to complete mildewed spot masking and image recovery. According to the method, the mildewed black-and-white photographic negative film is preprocessed, then the methyl silicone oil is dropwise added to the mildewed black-and-white photographic negative film, the biocompatibility is good, the excellent masking effect on mildew spots is achieved, the image definition is ensured, and the image is recovered; and the safety is good.

The invention provides a heat-conducting filler for low-specific-gravity gel. The heat-conducting filler comprises the following components in parts by mass: 100-300 parts of silica powder with the particle size of 30-40 microns; 400-500 parts of aluminum hydroxide with the particle size of 40-60 microns; 300-400 parts of aluminum hydroxide with the particle size of 5-10 microns; 10-100 parts of calcium carbonate with the particle size of 1-5 microns; 8 to 10 parts of a silane coupling agent; according to the present invention, the low-cost, low-specific-gravity and high-insulation silica powder, calcium carbonate, aluminum hydroxide and other materials are adopted, the calcium carbonate is adopted to replace zinc oxide to form the filler thixotropic agent, the compounding ratio of the silica powder, the aluminum hydroxide and the calcium carbonate with different particle sizes is optimized, and the surface modification process is combined, such that the filler thixotropic property is improved; the heat-conducting gel has low oil absorption value and good filling performance in a silica gel system, and can effectively solve the problems of cost, density, insulating property and the like of the existing heat-conducting gel product.

The invention discloses a high-thermal-conductivity ultrathin silica gel gasket and a preparation method thereof, and belongs to the technical field of thermal conductive materials. The high-heat-conductivity ultrathin silica gel gasket is prepared from silicon rubber, vinyl silicone oil, MQ silicon resin, a coupling agent, dimethyl silicone oil, hydrogen-containing silicone oil, an inhibitor, a catalyst and heat-conducting powder according to specific mass parts, wherein the heat-conducting powder is prepared by compounding sphere-like aluminum oxide and multi-particle-size spherical aluminum oxide; by accurately controlling the performance parameters of each component and the particle size distribution and mass ratio of the heat-conducting powder, collaborative optimization of the heat-conducting property, the processing property and the structural stability is realized. The heat conductivity coefficient of the prepared high-heat-conductivity ultrathin silica gel gasket is larger than or equal to 5.0 W / (m.K), the thickness can be as low as 0.25 mm, the heat resistance is smaller than or equal to 0.21 K.in / W, the breakdown voltage is larger than or equal to 3.7 kV, needle holes and stripping phenomena do not exist in the surface, and the high-heat-conductivity ultrathin silica gel gasket meets the heat dissipation requirement of precise electronic equipment. The preparation method is simple in process, high in controllability and suitable for industrial production.

A film-forming composition and a lip makeup product comprising same. The film-forming composition comprises the following components: a phenyl silicone oil and a film-forming agent, wherein the phenyl silicone oil comprises two or more of diphenyl dimethicone, trimethyl pentaphenyl trisiloxane, phenyl trimethicone and trimethylsiloxyphenyl dimethicone, and the viscosity of the phenyl silicone oil at 25°C is 50 mPa•s to 500 mPa•s; and the film-forming agent comprises at least one of hydrogenated polyisobutene and polyisobutene, and the viscosity of the film-forming agent at 75°C is 1500 mPa•s to 2500 mPa•s. The mass ratio of the phenyl silicone oil to the film-forming agent is (2-5):1. The film-forming composition is applied to a formulation system of a lip makeup product, and can reduce the phenomena of cup staining, color fading, etc. of the lip makeup product.

The invention belongs to the technical field of coating protection, and particularly relates to a preparation method of a single-component high-temperature fast curing silver-aluminum polymer coating applied to the surface of a coating layer. Comprising 175-180 parts of modified epoxy resin; 95 to 100 parts of flaky aluminum silver powder; 180-200 parts of a mixed solvent of dimethylbenzene and / n-butyl alcohol; 100 to 120 parts of dicyandiamide; 25 to 40 parts of 3-(3, 4-dichlorophenyl)-1, 1-dimethylurea; 10 to 12 parts of sodium molybdate; 4-8 parts of graphite; 1 to 2 parts of polydimethylsiloxane; 2 to 6 parts of a wetting agent HY-352; 3-5 parts of fumed silica; 0.5 to 3 parts of dimethyl silicone oil; and 0.2-2 parts of a hydroxymethyl cellulose agent. The coating disclosed by the invention has the advantages of thin coating, high-temperature rapid curing, relatively good corrosion resistance, good combination with a coating layer and the like, and also has excellent storage stability.

The invention relates to the technical field of butter packaging materials and discloses a butter packaging composite film and a preparation method thereof. The method comprises the following steps: synthesizing a vinylmethylsiloxane sodium sulfonate monomer; bridging an inorganic two-dimensional nano-platelet hydrotalcite and an organic polypropylene matrix through the vinylmethylsiloxane sodium sulfonate monomer to obtain a bridged composite, and subjecting the bridged composite to a melt granulation process to obtain a low-temperature resistant and oxygen-barrier polypropylene masterbatch; setting a film layer structure, a formula and a dosage of each film layer of the polypropylene composite film, using the low-temperature resistant and oxygen-barrier polypropylene masterbatch as a raw material for a low-temperature toughening and barrier functional layer of the polypropylene composite film, and adopting a co-extrusion blow molding film-forming process to obtain the butter packaging composite film. The film product can meet the low-temperature toughness requirements of frozen butter packaging and also has excellent oxygen barrier properties, thus having practical application value.

The invention relates to the field of materials, and discloses a low-temperature-resistant fluororubber heat-shrinkable sleeve and a preparation method thereof. The low-temperature-resistant fluororubber heat-shrinkable sleeve is prepared by taking fluororubber, an ethylene-ethyl acrylate copolymer, a nano magnesium hydroxide flame-retardant graft and an attapulgite graft as main raw materials and an antioxidant, a lubricant and the like as auxiliary materials through the processes of mixing, extrusion, irradiation, expansion and the like. Wherein the nano magnesium hydroxide flame-retardant graft is obtained by carrying out surface phosphorus-silicon modification on nano magnesium hydroxide by using triphenyl isocyanate thiophosphate and 2-amino-1-(butyldimethylsiloxy) butane, and has an efficient flame-retardant effect; the attapulgite graft is formed by grafting attapulgite to a polymer, agglomeration is prevented, the low-temperature resistance can be better exerted, and the finally prepared heat-shrinkable sleeve has low-temperature resistance and flame retardance.