29results about How to "Low oil absorption" patented technology

The invention discloses a silicone rubber foam material and a preparation method thereof. The silicone rubber foam material is prepared by mixing a component A and a component B in equal mass. The base rubber of the silicone rubber foam material takes vinyl hydroxyl silicone oil as a main body, 110 raw rubber is compounded and added, the mechanical property of silicone rubber foam can be effectively improved, the dispersity of the base rubber in a rubber material can be improved by adding modified aluminum hydroxide powder, the embrittlement degree of the material is reduced, and the flame retardant rating can reach V0; therefore, the material has a good application prospect in new energy battery materials.

The invention relates to a negative electrode material and a preparation method thereof, a negative electrode plate and a lithium ion battery, the negative electrode material comprises a silicon-based active substance and a carbon material, the oil absorption value of the negative electrode material is O mL / 100g, the specific surface area is S m < 2 > / g, the particle size concentration ratio of the negative electrode material is P1, P1 is equal to (D80 + D50) / (D50 + D20), the physical rebound capacity of the negative electrode material is T, T is equal to 0.01 * O * S / P1, and T is greater than 0.20 and less than 1.20. The negative electrode material disclosed by the invention has relatively low physical rebound capability, and the volume of a pole piece prepared from the negative electrode material is not easy to rebound after compaction, so that relatively high compaction density can be obtained, and excellent cycle performance is exerted.

The invention discloses a solid waste-based multifunctional tailing asphalt pavement material and a preparation method thereof, and the pavement material comprises the following components in parts by mass: 4.5-5.5 parts of polyurethane modified asphalt, 45-60 parts of titanate modified iron tailings, 2-5 parts of surface activated copper tailing powder, 20-35 parts of copper tailing sand and 0.5-1.0 part of acetic anhydride modified wollastonite fiber. The high and low temperature performance, the durability and the self-healing performance of the asphalt mixture are comprehensively improved by modifying the solid waste tailing material and the asphalt, and the application range of the asphalt mixture is effectively widened.

The invention belongs to the field of silane-modified adhesives, and relates to a high-strength and high-toughness silane-modified sealant and a preparation method, wherein the sealant comprises components by weight: 10-40 parts of silane-modified resin; 30-70 parts of nano-calcium carbonate; 0.1-2 parts of surface modifier; 1-20 parts of plasticizer; 0.1-2 parts of UV-resistant aging agent; 0.1-2 parts of antioxidant; 0.5-10 parts of reinforcing and toughening agent; 1-10 parts of water-removing agent; 1-15 parts of coupling agent; 0.01-5 parts of catalyst; and the surface treatment agent is an aluminate treatment agent. The present invention improves the compatibility of inorganic powder and silane-modified resin, increases the filling amount of inorganic filler, and retains the good mechanical properties of the material through a homemade surface treatment agent; adds a reinforcing and toughening agent containing a reactive group, improves the plasticity of the sealant before the reaction, and after participating in the reaction, free migration will not occur, improves the strength and flexibility of the glue, increases the elongation, and improves the bonding performance with a variety of substrates.

The invention relates to the technical field of quartz powder preparation, in particular to a preparation method of modified quartz powder. The preparation method of the modified quartz powder provided by the invention comprises the following steps: S1, adding a modifier and water into a quartz sand raw material by adopting a first pumping device and a second pumping device respectively to obtain a first mixture; s2, performing premixing treatment on the first mixture to obtain a second mixture; and S3, grinding the second mixture to obtain the modified quartz powder. The preparation method of the modified quartz powder has the advantages of good modification effect, high production efficiency, low energy consumption, good stability of the modification process, safety and no risk, and avoids the reduction and failure of the modification effect caused by long-time mixing of the modifier and water.

The invention discloses a fast-curing powder coating and a preparation method thereof, and belongs to the field of powder coatings. According to the invention, carboxylated polyester resin and triglycidyl isocyanurate are added for cross-linking reaction to form a network structure. The curing accelerator can activate carboxyl functional groups and effectively promote the functional groups in the carboxylated polyester resin to react, so that the curing speed of the powder coating is increased; the added precipitated barium sulfate can reduce the overall viscosity of the powder system; the modified leveling agent and the wetting accelerant have a synergistic effect, so that the wettability of the powder coating is effectively improved, the internal surface tension of the powder coating in the curing and melting process is reduced, the leveling performance of the powder coating is improved, meanwhile, the carboxylated polyester resin is easier to infiltrate pigments, volatile substances are accelerated to overflow from the surface, and the color fastness of the powder coating is improved. Meanwhile, under the synergistic effect of the degassing agent, bubbles are accelerated to break and overflow, the appearance of a coating film is obviously improved, a flat coating film surface is obtained, and therefore the problem that the coating film surface is rough and uneven due to rapid curing is solved.

This invention provides a method for preparing titanium dioxide and its uses, relating to the field of inorganic chemical pigments. The preparation method includes the following steps: taking a metatitanic acid slurry, adding multivalent ion pairs to obtain a mixed slurry, calcining it to obtain a primary titanium dioxide product; adding water to the primary titanium dioxide product to make a slurry of a specific concentration, then sand-milling and ultrasonicating it, adding citric acid to obtain a ground slurry; heating, adjusting the pH, adding sodium silicate solution dropwise, and coating with a silica film; further adjusting the pH of the slurry to alkaline, adding sodium aluminate solution to form an aluminosilicate mesophase; adding a surfactant to form a solvation layer, washing and drying to obtain a crude titanium dioxide product; and pulverizing it to obtain the finished titanium dioxide product. The median particle size d of the titanium dioxide is... 50 It has a pH of 0.24-0.28, a filtration pressure of 0.2 bar / g, low metal impurity content, a zeta potential ≥40 mV, and a lightness value L of 99.7, and can be used in the production of cellulose acetate.

The invention relates to the technical field of powder surface modification, in particular to a quartz powder modifier, a preparation method thereof and a preparation method of modified quartz powder. The invention provides a quartz powder modifier. The quartz powder modifier comprises unsaturated polyether, a fluorescent whitening agent and water in a mass ratio of (20-40): (0.1-3): (57-79.9), the structural general formula of the unsaturated polyether is as follows: CH2 = CH-R-(OCH2CH2) nOH, CH2 = C (CH3)-R-(OCH2CH2) nOH or CH2 = CH-OR-(OCH2CH2) nOH; in the formula, n is an integer greater than or equal to 0, and R is selected from one of C0-C4 alkyl groups. The quartz powder modifier disclosed by the invention can be used for effectively performing surface modification on quartz powder, reducing the oil absorption value and improving the whiteness; therefore, the compatibility, dispersity and stability of the quartz powder in an organic matrix are effectively improved, and the dosage of unsaturated resin is reduced.

The invention discloses a method for improving solubility of ascorbyl palmitate in grease and application of the ascorbyl palmitate. The method mainly comprises two steps of modification and purification. In the modification step, ascorbyl palmitate and stearoyl chloride react under pyridine catalysis, and the reaction conditions comprise specific temperature, time and magnetic stirring, so that the reaction is uniformly carried out. The purification step involves dissolving, washing, drying and filtering to obtain a purified modified product. The invention also relates to the modified ascorbyl palmitate prepared by the method, and discusses application of the modified ascorbyl palmitate as an additive in preparation of oil such as soybean oil, sunflower seed oil, rapeseed oil or palm oil. Specifically, the additive can significantly improve the oxidation resistance of grease, and reduce the viscosity and usage amount of palm oil during food frying. The ascorbyl palmitate modified by the method has better solubility in grease, and a new solution is provided for oxidation resistance and modification of the grease.

The invention provides a preparation method and application of modified dolomite, and belongs to the technical field of inorganic filler. The method comprises the following steps: mixing dolomite powder and a solvent to prepare slurry; a modifier is added into the slurry and stirred for a reaction, a mixed material is obtained, and the modifier comprises oleic acid and an aluminate coupling agent; and carrying out solid-liquid separation on the mixed material, collecting a solid phase, and drying the solid phase to obtain the modified dolomite. On the premise of high activity and high hydrophobicity of aluminate, oleic acid is introduced to make up for the defect that a single aluminate coupling agent may cause a high oil absorption value, so that the modified dolomite has high activation index, high hydrophobicity and low oil absorption value, thereby well improving the surface hydrophilicity and hydrophobicity and interface bonding force of the dolomite; the modified dolomite is more suitable for being combined with other components for application, the additional value of dolomite mineral resources is effectively improved, and a feasible path is provided for high-quality development of dolomite.

The invention provides a preparation method and application of a calcium carbonate powder modified whitening integrated auxiliary agent. The preparation method comprises the following steps: slowly dripping DSD acid, water and a saturated Na2CO3 solution into a cyanuric chloride ice-water mixture, controlling the temperature at 3-5 DEG C for reaction, then adding ethanolamine and p-aminobenzoic acid, adjusting the pH value to 8 with a saturated Na2CO3 solution, heating the temperature to 40-45 DEG C for reaction for 3.5 hours; adding diethylaminoethyl methacrylate, maintaining the pH value at 9 with a saturated Na2CO3 solution, heating the temperature to 85-90 DEG C for reaction for 6 hours, and cooling the mixture to room temperature; adding sodium stearate, sodium dodecylbenzene sulfonate and water, heating and stirring the mixture to obtain the modified whitening integrated auxiliary agent. It is applied to calcium carbonate powder with a mesh size of 800-2000, a whiteness (CIE) of 92-94, and an oil absorption value of 33-38 g / 100 g to obtain a high-activity and high-white calcium carbonate powder with an oil absorption value of 11-13 g / 100 g, a whiteness value (CIE) increased to 96-98.5, and a whiteness value (CIE) increased by 4.0-4.5.

The utility model relates to the technical field of powder processing, and particularly discloses an ultrafine powder microbead sorting system which comprises a raw material warehouse, a primary grading buffer bin, a primary vertical single-rotor grader, a bag type dust collector I, a secondary vertical single-rotor grader, a cyclone collector, a bag type dust collector II and an ultrafine powder bin which are sequentially communicated in series, the first-stage vertical single-rotor grader is further connected with a primary powder selecting coarse powder bin, the second-stage vertical single-rotor grader is further connected with an ultrafine grading coarse powder bin, and the cyclone collector is further connected with a secondary fine powder bin; according to the fly ash secondary sorting device, fly ash is subjected to secondary sorting, micro-bead products with different mesh numbers are selected through control, large-particle-size powder is conveyed to other procedures to participate in grinding and sorting, small-particle-size powder can replace talcum powder, silica powder, ground calcium carbonate and other filling materials in the coating industry, the application industry of fly ash is widened, and the application range of fly ash is widened. The recycling of the fly ash is improved, the energy consumption is reduced, and meanwhile, the environmental pollution caused by mining is reduced.

The invention discloses coal gangue with a low oil absorption value and a preparation method thereof, and belongs to the technical field of polymer composite material functional assistants, and the coal gangue is prepared from the following raw materials in parts by weight: 70-85 parts of coal gangue, 3-4 parts of palmitic acid, 2-4 parts of stearic acid, 2-5 parts of polyethylene wax, 3-7 parts of polypropylene wax and 5-10 parts of linear low density polyethylene powder. The preparation method comprises the following steps: mixing the raw materials, stirring, heating, and extruding in a single screw extruder after stirring to obtain the coal gangue with low oil absorption value. Through a multi-layer filling modification technology, the coal gangue is gradually filled and modified by the low-viscosity-high-viscosity auxiliary agent, and the modified coal gangue which is low in oil absorption value, low in gas displacement and high in compatibility is obtained. In addition, the raw materials are easy to obtain, and the preparation method is simple and convenient to popularize and apply.

The application discloses a tricyclic borate coupling agent, which is synthesized by the following method: taking boric acid, diethanolamine and toluene, heating to reflux and water separation for 2 hours; adding phenol to reflux and water separation for 8 hours; removing toluene by vacuum distillation, purifying by ethyl acetate to obtain a bicyclic borate phenyl ester. Taking cyanuric chloride, tetradecylamine and anhydrous THF, reacting at 0 DEG C for 2 hours, continuing to react at 35 DEG C for 4 hours; filtering, removing THF by vacuum distillation, purifying by ethanol to obtain a double long-chain amino triazine compound. Taking the bicyclic borate phenyl ester, the double long-chain amino triazine compound, DMF and sodium carbonate, reacting at 130 DEG C for 8 hours; filtering, removing DMF by vacuum distillation to obtain the tricyclic borate coupling agent. The application further discloses a synthesis method and application of the tricyclic borate coupling agent. The tricyclic borate coupling agent provided by the application introduces a cyclic large steric group and a conjugated aromatic ring on a B-O bond, enhances the molecular structure stability of the tricyclic borate coupling agent, significantly reduces the oil absorption value of heavy calcium carbonate powder and effectively improves practicability.

The invention discloses a preparation method of a polypropylene glass fiber composite material with high temperature discoloration resistance and high electromagnetic compatibility, which comprises the following steps: raw material preparation: preparing the following components in percentage by mass: 60-80 parts of polypropylene resin, 10-20 parts of low dielectric fiber, 1-3 parts of titanium dioxide and 0.5-1.5 parts of coupling agent; the preparation method comprises the following steps: 1, carrying out pretreatment and melt blending on the raw materials, carrying out melt blending on the treated raw materials at 200-240 DEG C to obtain a composite material melt, carrying out granulation, and carrying out granulation on the composite material melt through a granulator to obtain composite material particles, and 2, carrying out injection molding, heating the composite material particles to 220-260 DEG C, carrying out extrusion molding, and carrying out cooling to room temperature to obtain the conductive material. And performing injection molding through an injection molding machine. By adding the low-dielectric fiber, the conductive material mixture and the titanium dioxide and optimizing the proportion and the processing technology of all the components, the prepared polypropylene glass fiber composite material has excellent high-temperature discoloration resistance, high electromagnetic compatibility and low oil absorption value, and can meet the application requirements in the high-end field.

The invention provides a method for preparing high-white and high-activated ground calcium carbonate with a composite functional additive, comprising the following steps: mixing DSD acid, water and a saturated Na2CO3 solution and stirring until the solution is clarified, dripping the mixture into a mixture of cyanuric chloride and ice water, stirring in an ice bath and controlling the temperature at 3-5°C for reaction for 1.5h; then adding 3-aminopropyltrimethoxysilane and 4-aminobenzenesulfonic acid, adjusting the pH to 8 with a saturated Na2CO3 solution, controlling the temperature at 40-45°C, and reacting for 3.5h; then adding diethylaminoethyl methacrylate Ester, maintain pH=9 with saturated Na2CO3 solution, heat to 85-90℃, stir to react for 6h, cool to room temperature; finally add sodium dodecylbenzene sulfonate and water, heat and stir evenly to obtain composite functional additive; add 20Kg of heavy calcium carbonate powder with 600-1250 mesh and whiteness (CIE) of 92-94, stir, filter and dry to obtain high-white and high-activated heavy calcium carbonate, whose oil absorption value is 12-15g / 100g, and whiteness value (CIE) is increased by 3.5-4.0. The patented technology of the present invention can significantly improve the whiteness value of calcium carbonate powder and effectively reduce the oil absorption value of heavy calcium carbonate powder, achieving the dual effects of whitening and surface activation.

The invention provides a negative electrode material and a preparation method thereof, and a battery, the negative electrode material comprises a silicon-based active substance and a carbon material, the oil absorption value of the negative electrode material is O mL / 100 g, the specific surface area is S m < 2 > / g, the tap density is T g / cm < 3 >, the compaction degree of the negative electrode material is Y, Y = T / (0.01 * O * S), and Y is more than 0.6 and less than 3.0. The negative electrode material provided by the invention has relatively high compaction capability, and is easy to compact in a pole piece preparation process, so that relatively high compaction density is obtained, and the cycle performance of the battery is improved.

The invention relates to the field of BMC molding compounds, in particular to a preparation method of a low-density BMC molding compound. The low-density BMC comprises the following components in parts by mass: 15-17 parts of unsaturated polyester resin, 5-7 parts of low-shrinkage resin, 1.5-2 parts of zinc stearate, 8-10 parts of bamboo powder, 25-35 parts of aluminum hydroxide, 25-30 parts of calcium carbonate, 0.3-0.5 part of a curing agent, 0.3-0.7 part of an inhibitor, a plurality of pigments and 5-10 parts of glass fibers. The density is reduced through the bamboo powder, and the cost is greatly reduced.

The application discloses a device and method for reducing the oil absorption of fried potato chips, which comprises a frying cavity, a draining cavity, a rotating drive mechanism arranged at the upper end of the frying cavity, a vacuum device connected with the draining cavity or the frying cavity through a control valve, a frying basket, and the frying basket is detachably connected with the rotating drive mechanism and reciprocatingly arranged between the draining cavity and the frying cavity. The device can complete the frying and draining of potato chips, clean the frying oil attached to the surface of the potato chips, and reduce the oil content of the potato chips. The method can add a certain amount of gamma oryzanol into the oil, control the physicochemical properties of the heat transfer medium oil in the frying process, reduce the viscosity increase value of the frying oil, inhibit the evaporation and escape of water in the fried food, and combine with hot centrifugal rotation to reduce the oil absorption of the fried food in the frying process and the cooling stage.

The invention relates to the field of BMC molding compound production, in particular to a preparation method of a regenerated BMC molding compound. The method comprises the following steps: (1) granulating the waste molding compound, and crushing by using a particle crusher to obtain 80-120-mesh particles and powder of a prepared product; (2) grinding the powder by using a spherical grinding machine, and adding a surfactant and zinc stearate powder in the grinding process for surface treatment to reduce the surface tension of the powder, so as to reduce the oil absorption rate and obtain particles of 400 + / -20 meshes and particles of 800 + / -20 meshes of a prepared product; (3) stirring unsaturated polyester resin / low-shrinkage resin / curing agent / inhibitor by using a dispersion machine; (4) adding the materials obtained in the step (3) into a kneading machine, adding zinc stearate and the prepared 80-120-mesh particles, the prepared 400 + / -20-mesh particles and the prepared 800 + / -20-mesh particles, and kneading and stirring the materials and the prepared 80-120-mesh particles, the prepared 400 + / -20-mesh particles and the prepared 800 + / -20-mesh particles; and (5) adding glass fibers, kneading and stirring to obtain the BMC molding compound.

The application relates to a production control method, system, terminal and medium of low oil absorption deep-fried doughnuts, the production control method comprising the following steps: acquiring the actual water content of dough in a low-temperature pre-solidification stage with an oil temperature of 120 DEG C and the oil temperature field uniformity; judging whether the actual water content is lower than a water content threshold value; if yes, judging whether the continuous duration is not less than a duration threshold value and the oil temperature field uniformity is less than a threshold value; if yes, entering a medium-temperature structure solidification stage, the oil temperature is increased to 160 DEG C at a set temperature increasing rate, and a molecular sieve is preheated to 60 DEG C; according to a polar component target value, a target deep-frying duration is predicted; judging whether the target deep-frying duration is greater than a planned deep-frying duration; if yes, starting the molecular sieve; when the deep-frying duration reaches the planned deep-frying duration, entering a negative pressure oil removal stage; acquiring a residual oil rate; judging whether the residual oil rate is less than a residual rate threshold value; if yes, reducing the oil temperature to 80 DEG C. The application can reduce the oil absorption rate while ensuring the food quality.

The invention provides an application of N,N,N-tris(2-hydroxypropyl)amine cyclic borate as an inorganic non-metallic mineral grinding aid. The N,N,N-tris(2-hydroxypropyl)amine cyclic borate as a grinding aid has the effects of making the particles of the powder finer, having better dispersibility and better compatibility.

The invention provides heavy calcium carbonate with a low oil absorption value as well as a preparation method and application thereof, and belongs to the technical field of functional inorganic non-metallic materials. The calcite powder is sequentially subjected to drying dehumidification, infiltration modification and surface coating modification to obtain the low-oil-absorption-value heavy calcium carbonate. The heavy calcium carbonate prepared by the invention has a relatively low oil absorption value, and has better associativity and compatibility with PVC (Polyvinyl Chloride) resin.

The invention provides modified calcium silicate, a preparation method and application thereof and a coating, and belongs to the technical field of coatings. The preparation method comprises the following steps: mixing a Na2SiO3 solution, a Ca (OH) 2 solution, a modifier and water, and carrying out hydrothermal modification to obtain the modified calcium silicate. According to the invention, the modifier increases the lipophilicity and dispersity of calcium silicate, improves the compatibility of calcium silicate with the coating, and further optimizes the mechanical properties of the coating, and the coating formed by the prepared coating has good adhesive force and mechanical properties. The hydrothermal modification parameters are further limited, the crystallization degree and the deagglomeration of the modified calcium silicate are improved by increasing the temperature, the crystal growth can be optimized by prolonging the reaction time of the hydrothermal modification, but secondary agglomeration can be caused by overlong reaction time, uniform mixing is ensured by the rotating speed, and the phase composition of the product is influenced by the Ca / Si molar ratio. And the Na2SiO3 solution is limited to be obtained from high-silicon solid waste, so that the dual goals of high-value utilization of the solid waste and reduction of the coating cost are achieved.

The application provides a kind of addition type bonding glue with chemical resistance and its preparation method and application.The addition type bonding glue includes silicone composition and modified filler;The silicone composition includes 4-amino-3,5-difluorophenol modified tackifying MQ resin, vinyl silicone oil, hydrogen-containing silicone oil, catalyst and inhibitor;The modified filler is obtained by the reaction of coupling agent and filler after.The application modifies MQ resin by 4-amino-3,5-difluorophenol, introduces C-F bond, C-F bond has large bond energy, thereby gives the excellent stability of bonding glue.Meanwhile, C-F bond has low surface energy, thereby gives the excellent chemical resistance and corrosion resistance of bonding glue such as oil repellency.Secondly, modified tackifying MQ resin has electron-donating ability amino, can further improve the bonding strength of bonding glue, and its chemical resistance.

The invention relates to the related technical field of transformer heat dissipation, and discloses a modification method of special nano calcium carbonate for PVC injection molding materials, which comprises the following steps: S1, preparation of a nano calcium carbonate suspension: diluting 100 parts of lime milk after standing for 48 hours, adjusting the specific gravity to 1.060-1.080, cooling to room temperature, and then conveying to a bubbling carbonation reaction kettle with the volume of 60 m < 3 >; the prepared nano calcium carbonate has the advantages of being good in dispersity and processability, low in oil absorption value, high in thixotropy, high in activation rate, good in stability, close to neutral in pH value, uniform in particle size and the like, the rigidity, toughness, smoothness, bending strength and other performance of PVC can be improved when the nano calcium carbonate is used with PVC, the requirement for reaction conditions is not high through the method, the production cost is low, and the method is suitable for industrial production. The method is simple in process, easy to operate, low in energy consumption, high in synthesis efficiency and easy for industrial production, has good economic benefits, social benefits and ecological benefits, and is widely applied to coatings, rubber, medicines and cosmetics.

The invention discloses magnesium hydroxide with a low oil absorption value, a preparation method of the magnesium hydroxide and a halogen-free low-smoke flame-retardant cable material.The preparation method of the magnesium hydroxide with the low oil absorption value comprises the steps that surface modification is conducted on magnesium hydroxide powder through a composite modifier, and the composite modifier comprises HLB gt; 10 anionic surfactant and HLB (Hydrophile Lipophile Balance) are gt; and 10 parts of a nonionic surfactant. The composite modifier is adopted to modify the magnesium hydroxide powder, the composite modifier is successfully attached to the surface of the magnesium hydroxide, the oil absorption value of the magnesium hydroxide is greatly reduced, and the flame retardant effect of the magnesium hydroxide is not affected. When the magnesium hydroxide is used in the halogen-free low-smoke flame-retardant cable material, the dispersity and compatibility of the low-oil-absorption-value magnesium hydroxide in a high polymer material are improved, the filling amount of the low-oil-absorption-value magnesium hydroxide in unit volume is increased, and the flame-retardant effect is improved.

This invention provides a highly dispersible multifunctional composite powder, its preparation method, and its applications, belonging to the field of functional inorganic non-metallic mineral filler processing technology. The highly dispersible multifunctional composite powder of this invention has a three-layer ordered coating structure: an inner deagglomeration layer, a middle activation layer, and an outer spatial isolation layer. The inner deagglomeration layer is obtained by covalent bonding between a silane coupling agent and the silanol groups on the surface of talc. The middle activation layer is obtained by coordination bonding between a metal coordination coupling agent and the calcium-magnesium active sites on the surface of dolomite and natural magnesium carbonate. The outer spatial isolation layer is obtained by melting a steric hindrance dispersant into a film. This invention can achieve precise layered coating of ternary symbiotic minerals, effectively improving the compatibility and melt dispersibility of the filler with PVC resin, and preparing a highly dispersible multifunctional composite powder that can completely replace traditional calcium-based composite fillers, thereby improving the overall performance of semi-rigid PVC calendered films.

The invention discloses a composite heat-conducting filler and a preparation method thereof, heat-conducting silicone rubber and a preparation method thereof, and application of the heat-conducting silicone rubber, and belongs to the technical field of heat-conducting materials. The key point of the technical scheme is that the heat-conducting filler comprises spherical boron nitride, flaky boron nitride, aluminum hydroxide and a silane coupling agent; the mass ratio of the spherical boron nitride to the flaky boron nitride to the aluminum hydroxide is (8-12): (2-4): (7-10), and the addition amount of the silane coupling agent is 0.8-3.2% of the total amount of the spherical boron nitride, the flaky boron nitride and the aluminum hydroxide, so that the composite heat-conducting filler provided by the invention is high in filling amount, high in heat conductivity coefficient and good in flame-retardant effect, and after the filler is applied to silicone rubber, the flame-retardant effect is good. The silicone rubber has the excellent performance of high heat conductivity, low density, low viscosity and high flame retardant grade, heat generated by heat dissipation components can be quickly and effectively conducted out, and the effect of prolonging the service life of the components is achieved.