1616 results about "Fumed silica" patented technology

A method of continuous 3D printing to print an article is provided. The method includes displacing a nozzle of the 3D printer in a nozzle displacement direction; extruding the ink from the nozzle concurrently with the displacement of the nozzle to form an extrudate on the porous substrate; and displacing the rotating magnetic field in the nozzle displacement direction simultaneously with the displacement of the nozzle. The ink includes a plurality of magnetically responsive particles and a colloidal gel. The colloidal gel may include fumed silica in an aqueous solution.

The invention relates to the field of membrane materials, and discloses an epoxy modified starch-based degradable membrane and a preparation method thereof, the epoxy modified starch-based degradable membrane comprises epoxidized starch, modified nanocellulose and a plasticizer; the modified nano cellulose is prepared by mixing a modified composite filler, a nano cellulose dispersion liquid and a zinc acetate dihydrate aqueous solution; the nano-cellulose dispersion liquid is prepared by adhering polytannic acid formed by oxidation and self-polymerization of tannic acid to the surface of nano-cellulose; the modified composite filler is prepared by performing carboxylation modification on nano titanium dioxide coated fumed silica nanoparticles by using succinic anhydride and gamma-aminopropyltriethoxysilane, then reacting with polyethyleneimine to obtain an aminated composite filler, and finally grafting glycidyl dodecyl dimethyl ammonium chloride to the surface of the aminated composite filler. The prepared film material is high in tensile strength, has certain hydrophobicity, and has good heat resistance, antibacterial property and flame retardant property.

The invention relates to an insulating weather-resistant powder coating and a preparation method thereof, and belongs to the technical field of coatings, and the powder coating comprises composite modified resin, a dual curing agent, a functional filler, a polyacrylate leveling agent, fumed silica, a benzotriazole ultraviolet light absorber, polytetrafluoroethylene wax powder and the like. A core-shell structure of the composite modified resin is designed, high insulativity is kept through a silane modified epoxy core layer, a weather-proof barrier is provided through an acrylic acid shell layer, and the phase separation problem is solved through interface chemical bonding; a dual-curing mechanism is designed, and isocyanate and acrylic hydroxyl react to form an interpenetrating network while an epoxy core layer is cured by anhydride; a filler synergistic effect is designed, silane coupling agent modified nano boron nitride forms a three-dimensional heat-conducting insulating network, and rutile type titanium dioxide is coated with silicon dioxide, so that ultraviolet aging is resisted. All the components cooperate with one another, so that the coating has excellent insulativity, weather resistance, adhesiveness and the like at the same time.

The invention discloses a transfer film as well as a preparation method and application thereof, and relates to the field of transfer films. The transfer printing film comprises a base film layer, a matte coating and a transfer printing coating which are sequentially overlapped, the transfer printing coating is formed by curing transfer printing coating paint; the transfer printing coating paint is prepared from the following raw materials in percentage by weight: 20 to 40 percent of thermosetting resin, 40 to 64 percent of first radiation curing resin, 10 to 32 percent of first monomer, 0 to 8 percent of first photoinitiator, 0 to 3 percent of catalyst, 0.5 to 2 percent of fumed silica and 0.1 to 3 percent of ultraviolet light absorber. The prepared triamine decorative plate has high hardness and good scratch resistance.

The invention discloses ceramic fluorinated silicone rubber and a preparation method thereof. The ceramizable fluorosilicone rubber comprises the following raw materials in parts by weight: 100 parts of fluorosilicone raw rubber, 10-30 parts of fumed silica, 4-8 parts of a structure control agent, 10-20 parts of an organic-inorganic compound fire-resistant filler, 4-10 parts of reinforced fibers, 20-30 parts of a carbon-based ceramic additive and 1-2 parts of a vulcanizing agent. The preparation method comprises the following steps: S1, adding the fluorosilicone raw rubber into a kneading machine, and then adding the fumed silica and the structure control agent to start mixing; s2, adding an organic-inorganic compound refractory filler, reinforced fibers and a carbon-based ceramic additive into the mixed material obtained after mixing in the step S1, and continuously mixing; s3, carrying out vacuum treatment on the material mixed in the S2, cooling the material to room temperature, adding a vulcanizing agent into a double-roller open mill, and uniformly mixing; and S4, performing tabletting vulcanization on the material mixed in the step S3 on a plate vulcanizing machine, and then performing secondary vulcanization in a drying oven to obtain the ceramization fluorinated silicone rubber.

The invention discloses a high-weather-resistance TPO waterproof coiled material and a preparation method thereof, and belongs to the technical field of high polymer materials. The waterproof coiled material is prepared from the following raw materials: high-density polyethylene, low-density polyethylene, an ethylene-octylene copolymer, ethylene propylene diene monomer, polypropylene, maleic anhydride grafted polyethylene, polyethylene wax, calcium carbonate powder, an antioxidant 1010, modified lignin, modified fumed silica and a modified nano inorganic composite light stabilizer. The tensile strength of the obtained waterproof coiled material is 20.3-21.3 MPa, the elongation at break is 602-621%, the tear strength is 69-77 N / mm, the low-temperature bending property is no crack at-40 DEG C, and the waterproof coiled material is very excellent in heat aging resistance, light aging resistance and artificial climate accelerated aging resistance.

The invention belongs to the technical field of silica gel foam materials, and particularly relates to high-reflection, high-temperature-resistant and heat-insulating ceramic silica gel foam and a preparation method of the high-reflection, high-temperature-resistant and heat-insulating ceramic silica gel foam. The ceramic silica gel foam is obtained by mixing vinyl silicone oil, fumed silica, a platinum catalyst, an inhibitor, hydroxyl silicone oil, hydrogen-containing silicone oil and a composite filler and then performing vulcanization treatment. Wherein the composite filler is composed of a heat reflection filler, a heat-resistant agent, hollow glass beads and low-melting-point glass powder, and each filler is white or transparent; the molar ratio of Si-H groups in the hydrogen-containing silicone oil to Si-OH groups in the hydroxyl silicone oil is (4-6): 1. Through formula design, the silica gel foam has high reflection capability and low heat conductivity coefficient, can keep a complete heat reflection surface at high temperature, is not easy to crack, effectively prolongs the high temperature resistance and heat insulation capability, and is suitable for battery thermal runaway protection. Meanwhile, the compression stress curve of the silica gel foam is gentle, and the silica gel foam has excellent buffering performance.

The invention discloses a preparation method of capillary crystalline self-repairing concrete, which comprises the following steps: adding zeolite powder into a urease solution for dipping treatment to obtain pretreated zeolite powder; adding the pretreated zeolite powder into a mixed solution A containing urea and sodium alginate, adding a calcium chloride solution A, and separating a solid phase to obtain coated zeolite powder; fumed silica is added into a magnesium chloride solution to be mixed, polyethylene glycol is added, ultrasonic dispersion is conducted, and dispersion liquid is obtained; mixing the coated zeolite powder with the dispersion liquid, adding a sodium alginate solution, mixing, adding a calcium chloride solution B, and separating a solid phase to obtain modified zeolite powder; mixing preparation raw materials including the modified zeolite powder, the cement, the fly ash, the polycarboxylic acid water reducing agent and the aggregate to obtain the concrete. The concrete prepared through the method is good in crack self-repairing effect and good in mechanical strength, and the durability and the service life of the concrete can be improved easily.

The invention discloses a super-wear-resistant super-hydrophobic coating in the technical field of coatings, the super-wear-resistant super-hydrophobic coating comprises a primer and a finishing coat, the primer comprises solvent-free aliphatic polyether polyol resin, micro-powder particles, di-tetratoluene diisocynate, fumed silica nanoparticles and a primer magnetic attraction material; the finishing paint comprises hydrophobic nanoparticles, a diluent, a finishing paint magnetic attraction material and a hydrophobic treatment agent, the primer magnetic attraction material is ferrite powder, and the finishing paint magnetic attraction material is nickel powder. The preparation method comprises the following steps: 1, preparing the primer; secondly, primer is sprayed; step 3, roughening the primer; 4, finish paint is manufactured; step 5, spraying finish paint; and step 6, detecting the performance of the coating. The preparation method is scientific and reasonable, the uniformity and stability of the coating in the preparation and coating process are ensured by optimizing the composition of the coating material, improving the preparation process and introducing a magnetic suction device, and therefore the wear resistance, hydrophobicity and adhesive force of the coating are improved.

The invention belongs to the technical field of heat-conducting materials, and provides liquid metal-based composite heat-conducting silicone grease as well as a preparation method and application thereof. The modified silicone oil, the liquid metal, the heat-conducting auxiliary filler and the hydrophobic fumed silica in a specific ratio are used as main components of the liquid metal-based composite heat-conducting silicone grease, and the liquid metal-based composite heat-conducting silicone grease prepared by the invention has high heat conductivity coefficient (up to 6.05-10.0 W / mk) and low heat resistance (as low as 0.01-0.03 DEG C * cm < 2 > / W), can maintain a good appearance in double-85, high temperature 125 DEG C and temperature cycle aging tests, and has a wide application prospect. Therefore, the structure is suitable for an assembly interface of a power module and a radiator with high-power heat dissipation requirements, and the heat dissipation efficiency is improved.

The invention discloses a double-sided composite ultrahigh-viscosity self-adhesive film, a production process and equipment, the self-adhesive film comprises a base material layer and an adhesive layer, and the base material layer comprises a surface layer, a middle layer and a bottom layer; the formula of the surface layer comprises 90% of LDPE (Low-Density Polyethylene) and 10% of Exfin; the Exfin is a three-well chemical'silicon-like polyolefin copolymerization master batch '; the formula of the middle layer comprises 70% of LLDPE, 20% of LDPE and 10% of rim charge; and the formula of the bottom layer comprises 95% of LDPE and 5% of SEBS. And the formula of the adhesive layer comprises the following components: 30 parts of SEBS, 40-60 parts of tackifying resin, 10-20 parts of white oil, 1 part of fumed silica and 0.5 part of antioxidant 1010. According to the production process, casting co-extrusion is combined with a coating system, multi-layer materials with great difference can be stably subjected to interlayer melting convergence to form the ultrahigh-viscosity protective film at a time, and the production efficiency is greatly improved.

The invention provides a high-insulation black organic silicon coloring agent and a preparation method thereof. The high-insulation black organic silicon coloring agent comprises the following raw materials in parts by mass: 100 parts of a silicone oil carrier; 3-5 parts of passivated carbon black; 1-3 parts of fumed silica; wherein the passivated carbon black comprises carbon black and an organic silicon layer coated on the surface of the carbon black; the organic silicon layer is obtained by graft polymerization of polymethyltriethoxysilane and a functionalized silane coupling agent on the surface of the carbon black; the functionalized silane coupling agent comprises at least one of an aryl silane coupling agent and a fluorine-containing silane coupling agent. According to the black coloring agent, the advantage of high blackness of carbon black is maintained, meanwhile, the electric insulation performance and dispersion stability of the black coloring agent in a silicone oil system are remarkably improved, the problems that the carbon black is high in conductivity, poor in interface compatibility and prone to agglomeration are solved, and the black coloring agent is especially suitable for being applied to organic silicon materials with the high requirement for the insulation performance.

The invention provides ceramic silicone rubber as well as a preparation method and application thereof, and belongs to the technical field of functional materials. The ceramic silicone rubber provided by the invention is prepared from the following preparation raw materials in parts by mass: 90-105 parts of methyl vinyl silicone rubber; 35 to 45 parts of fumed silica; 3-10 parts of hydroxyl silicone oil; 0.1 to 8 parts of a silane coupling agent; 1-75 parts of an inorganic filler; the inorganic filler is mica powder, montmorillonite and wollastonite; 10-30 parts of low-melting-point glass powder, the melting point of the low-melting-point glass powder is 400-600 DEG C, and the low-melting-point glass powder is borate glass powder and / or phosphate glass powder; 0.1 to 0.3 part of platinum flame retardant; 0.5 to 1.5 parts of a vulcanizing agent; and 0.1-0.5 part of an internal release agent. The ceramic silicone rubber provided by the invention can maintain higher tensile strength and elongation at break on the basis of ensuring better ceramic performance.

The invention provides a self-repairing hydrated salt phase change microcapsule as well as a preparation method and application thereof, and belongs to the field of phase change materials. The preparation method comprises the following steps: preparing a hydrated salt phase change material and sorbitol into eutectic melt by adopting a melting method; strontium carbonate, sorbitol grafted nano titanium dioxide, SiO2-coated silicone rubber microspheres, hollow Al2O3 microspheres, tannic acid microcapsules, alpha-zirconium phosphate, melamine polyphosphate, diethyl aluminum hypophosphite, carboxylated multi-walled carbon nanotubes, polydopamine modified boron nitride nanosheets and hydrophilic fumed silica are added into the eutectic melt, and blending is performed to obtain a core material; The preparation method comprises the following steps: adding strontium carbonate, sorbitol grafted nano titanium dioxide, SiO2-coated silicone rubber microspheres, hollow Al2O3 microspheres, tannic acid microcapsules, alpha-zirconium phosphate, melamine polyphosphate, diethyl aluminum hypophosphite, carboxylated multi-walled carbon nanotubes, polydopamine modified boron nitride nanosheets and hydrophilic fumed silica into the eutectic melt; bio-based polyurethane-polyurea is used as a shell material, the core material is coated in the shell to prepare the microcapsule, and the temperature of the coating operation is not higher than the phase change temperature of the hydrated salt phase change material; the surface is coated with a super-hydrophobic coating. According to the invention, a solid filler system is constructed, and a low-temperature preparation process is combined, so that the phase-change microcapsule with high performance, high reliability and high safety is developed.

Slow-release particles and its preparation method, and a ceramic coating material and its preparation method, are provided The slow-release particles comprise: a slow-release material having a porous structure and / or layered structure; silicone oil, binding to the slow-release material. The slow-release material comprises at least one of vermiculite, zeolite, bentonite, diatomaceous earth, alpha alumina, silica aerogel, fumed silica, amorphous silica, hollow glass micropowder, porous silicate, layered silicate, porous phosphate, layered phosphate, porous carbonate, layered carbonate, porous sulfate and layered sulfate.

The invention discloses a hot and moisture dual-cured organic silicon sealant and a preparation method thereof. The organic silicon sealant is prepared from the following raw materials: hydroxyl-terminated methyl vinyl polysiloxane, alkoxy-terminated polydimethylsiloxane, active nano calcium carbonate, fumed silica, a cross-linking agent, a catalyst and a tackifier. The organic silicon sealant organically combines the advantages of a condensation type curing system and an addition type curing system, can be quickly positioned and cured, is high in strength, good in adhesion, excellent in temperature resistance and long in storage life after being cured, and can be used for various occasions needing quick positioning and assembling.

The invention discloses a fire extinguishing additive for a lithium battery and a preparation method of the fire extinguishing additive, and relates to the technical field of fire extinguishing. When the fire extinguishing additive is prepared, allylamine hydrochloride reacts with benzaldehyde to prepare double-bond aromatic Schiff base; ammonium dihydrogen phosphate is modified with lanthanum oxide and compounded with fumed silica, and mixed powder is prepared; the preparation method comprises the following steps: dissolving aluminum ammonium sulfate dodecahydrate, magnesium sulfate heptahydrate and a nucleating agent in water, and then adding a thickening agent, a polymer monomer, a cross-linking agent and an initiator for reaction to prepare a hydrated salt phase change hydrogel solution; and the mixed powder and the hydrated salt phase change hydrogel solution are mixed and stirred at a high speed, and the fire extinguishing additive is prepared. The prepared fire extinguishing additive has the advantages of being small in fire extinguishing agent dosage, high in fire extinguishing speed, high in cooling rate and free of after-combustion.

The application discloses a kind of ship super-long anticorrosion special nano powder coating, preparation method and application, belong to ship heavy anticorrosion material technical field.The preparation method of the ship super-long anticorrosion special nano powder coating is as follows: epoxy resin, graphene modified epoxy resin, core-shell structure ZnO@SiO2, modified 2,5-dimercapto-1,3,4-thiadiazole, borosilicate glass powder, flaky boron nitride, silane coupling agent modified silica, phenolic amine curing agent, 2-ethyl-4-methylimidazole, fumed silica, defoaming agent, ultraviolet absorber, high-temperature pigment are put into stirrer and stirred for 20-30min, then melt extrusion is carried out through double screw extruder, the extrusion temperature is 90-110 DEG C, grinds and sieves, and the ship super-long anticorrosion special nano powder coating is obtained.The coating prepared by the application has good anticorrosion performance and can be applied in the field of ship metal surface corrosion protection.

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

The invention discloses a perfluorohexanone fire extinguishing agent and a preparation method and application thereof.The perfluorohexanone fire extinguishing agent is prepared from, by mass, 60-70 parts of perfluorohexanone microcapsules, 10-20 parts of aluminum hydroxide, 6-10 parts of graphite, 5-10 parts of titanium dioxide, 4-8 parts of ultraviolet absorbent, 2-6 parts of ammonium polyphosphate, 3-6 parts of calcium oxide, 1-3 parts of fumed silica, 1-3 parts of nano-silica and 1-3 parts of trimethyl phosphate. According to the formula and process of the fire extinguishing agent, through triple technical innovation of shell layer modification, nano compounding and supercritical deposition, the breakthrough of efficient explosion suppression, long-acting anti-after-combustion, low toxicity and environment friendliness of the fire extinguishing agent is achieved, and the industrial popularization potential is achieved.

The invention discloses a mobile phone narrow frame low-pressure injection molding sealing adhesive and a preparation method thereof, and belongs to the technical field of adhesives. According to the technical scheme, the adhesive is characterized by being prepared from, by weight, 35-46 parts of aliphatic epoxy resin, 10-20 parts of polyether polyol, 16-25 parts of reactive diluent, 15-20 parts of toughened resin, 1.4-2.0 parts of initiator, 0.8-1.2 parts of coupling agent and 1.5-2.0 parts of fumed silica, and an adhesive layer obtained after the adhesive is subjected to UV curing is low in shrinkage rate, high in modulus and good in adhesion property. The width of the mobile phone frame can be well controlled, compared with a plastic piece, the screen-to-body ratio of a mobile phone screen can be further improved, and meanwhile the requirements for bonding and reliability of a client side can be met.

The invention discloses a modified thermal insulation coating and a preparation method and application thereof, and belongs to the field of building energy-saving materials. One modified compound is a thermo-sensitive polyelectrolyte layer-by-layer self-assembled alumina microsphere formed by alternately depositing polyethyleneimine and polyacrylic acid through electrostatic interaction, and the polyelectrolyte layer can dynamically swell or shrink along with the temperature to adjust the heat conductivity coefficient; and the other is magnesium silicate nanofiber coated with silicon dioxide and then grafted with fluorosilane, the hydrophobicity is improved by utilizing the low surface energy of the fluorosilane, and meanwhile, the binding force with a polymer interface is enhanced. The coating further comprises fumed silica, a dispersing agent, a defoaming agent and other auxiliaries. The preparation method comprises the following steps: sequentially adding the components into a high-speed dispersion machine, mixing, adjusting the viscosity, filtering and packaging. The coating has the advantages of intelligent temperature-sensitive adjustment, low heat conductivity, strong adhesion and weather resistance; the material is suitable for long-acting heat preservation in the fields of buildings, industrial equipment and cold chains.

The invention relates to the technical field of epoxy splicing adhesives, in particular to a high-performance prefabricated part epoxy splicing adhesive and a preparation method thereof.The epoxy splicing adhesive comprises a component A and a component B. The component A is prepared from 3%-8% of polyether polyol, 2%-4% of hydrophobic fumed silica, 0.1%-1% of a silane coupling agent, 0.01%-0.5% of a defoaming agent, 50%-75% of modified quartz sand, 1%-5% of color paste and the balance epoxy resin; the modified quartz sand is prepared by grafting an amino silane coupling agent on the surface of quartz sand, then reacting with polychlorophosphazene, and then reacting with glycidol; the component B comprises the following components in percentage by weight: 0.2-4% of color paste, 1-5% of hydrophobic fumed silica, 0.1-1% of an amino silane coupling agent, 10-25% of 0.5 mm quartz sand, 40-60% of 0.1 mm quartz sand and the balance of a modified amine curing agent; the preparation method has the advantage that the mechanical strength and the bonding strength of the epoxy splicing adhesive are improved.

The invention relates to the technical field of sealants, and discloses a full-bio-based polyurethane elastic sealant and a preparation method thereof, and the full-bio-based polyurethane elastic sealant is composed of a component A and a component B, the component A comprises bio-based polyol, a bio-based chain extender, a fumed silica thixotropic agent, a molecular sieve and a catalyst; the component B comprises bio-based isocyanate and a derivative thereof, a modified castor oil derivative, dimer acid polyol and a fumed silica thixotropic agent, the full-bio-based polyurethane two-component elastic sealant with high elastic elongation adopts full-bio-based raw materials, is environmentally friendly and renewable, reduces dependence on petroleum resources, and improves the elastic elongation rate by optimizing the components and the process. The elastic elongation is larger than or equal to 80%, excellent water resistance, weather resistance and mechanical performance are achieved, meanwhile, by adding the molecular sieve and the catalyst, the low moisture content and efficient curing are guaranteed, and the performance stability of the product is improved.

The invention belongs to the technical field of nano materials, and particularly discloses a preparation method and application of organic fluorine modified nano fumed silica, and the preparation method comprises the following steps: S1, uniformly preheating hydrophilic nano fumed silica powder as a raw material under a protective atmosphere; s2, adding an activating agent into the powder obtained in the S1 for mixing and activating, wherein the activating agent is a mixed solution of alcohol and acid or alkali; s3, adding an organic fluorine modifier into the material obtained in S2 for modification treatment, stopping heating, taking out the material after cooling, and performing vacuum drying and low-temperature removal treatment to obtain the organic fluorine modified nano fumed silica. The water contact angle of the nano fumed silica obtained through the treatment is larger than 120 degrees, the contact angle of diiodomethane is larger than 100 degrees, and the nano fumed silica shows hydrophobicity and oleophobicity and can be applied to stain-resistant, self-cleaning and super-hydrophobic materials and / or fluorosilicone rubber filler.

The invention relates to the field of printing ink, and discloses UV fission printing ink for outer packaging of cigarette cases and a preparation method of the UV fission printing ink. The UV fission ink is prepared from the following raw materials in percentage by weight: 32 to 50 percent of polyurethane acrylate, 30 to 40 percent of functional monomer, 6 to 10 percent of active amine, 4 to 8 percent of photoinitiator, 6 to 8 percent of fission regulator, 2 to 4 percent of polyethylene wax, 0.5 to 1 percent of defoaming agent and 1.5 to 3 percent of flatting agent. The fission regulator is prepared from fumed silica, polydipentaerythritol hexaacrylate, a silane coupling agent and a dispersing agent. The UV fission ink prepared in the invention keeps good fluidity, irregular wrinkle structures or pattern edges formed by printing are not easy to deform, the UV fission ink has good stereoscopic impression and clear lines, and the wrinkle structures or pattern edges are not easy to discolor and fall off.

The invention discloses transparent soil with high transparency and high similarity with natural soil and a preparation method of the transparent soil. The transparent soil comprises transparent particles, transparent pore liquid and an additive. The refractive indexes of the transparent particles and the transparent pore liquid are consistent, and the contact infiltration characteristic of the particle surfaces and the liquid is improved through the surfactant, so that the transparent soil with higher transparency, such as sandy soil, clay and floury soil, is obtained. Hydrophilic fumed silica is matched with polar pore liquid or hydrophobic fumed silica is matched with non-polar pore liquid to prepare high-strength transparent clay or silt with mechanical properties highly similar to those of natural clay or silt. According to the invention, the clay or silt consolidation time can be greatly shortened. The transparent soil with high transparency and high similarity with natural soil can improve the geometric dimension of a transparent soil model, reduce the dimension difference between a model test and a real engineering problem, and provide a more excellent method for researching various geotechnical geological engineering problems.

The invention relates to the technical field of thermal insulation materials, and discloses a polyurethane foam material and a preparation method and application thereof, the polyurethane foam material is prepared from a raw material composition containing polyol, isocyanate, a catalyst, a polymer microsphere emulsion and a filler; the filler contains one or more than two of aerogel, fumed silica and polymer microspheres; the polymer microsphere emulsion is prepared by adopting a soap-free emulsion polymerization method, the preparation raw materials of the polymer microsphere emulsion comprise an oleophylic polymeric monomer and an amphiphilic polymeric monomer, and the polymer microsphere is prepared by drying the polymer microsphere emulsion. According to the invention, the polymer microsphere emulsion is used as a foaming agent, and the polymer emulsion does not contain fluorine and a traditional surfactant, so that the prepared polyurethane foam material is low in heat conductivity coefficient and density, good in heat preservation and heat insulation performance and environment-friendly, and meanwhile, the strength of polyurethane foam can also be improved; by adding the filler, the heat conductivity coefficient of the polyurethane foam material can be further reduced, and the thermal insulation performance of the polyurethane foam material is improved.

The invention discloses a high-flexibility anti-cracking coating and a preparation method thereof, and belongs to the technical field of building coatings. The coating is prepared from the following components in parts by mass: 50 to 70 parts of acrylic acid-organic silicon copolymer elastic emulsion with a core-shell structure, 3 to 8 parts of nano cellulose and polyester staple fiber composite fiber reinforced system, 20 to 30 parts of modified mica powder and fumed silica functional filler with a high radius-thickness ratio, 5 to 10 parts of auxiliaries and 10 to 15 parts of deionized water. A core layer of the elastic emulsion is a butyl acrylate-styrene elastomer, a shell layer of the elastic emulsion is a methyl methacrylate-organosiloxane copolymer, and a coating is endowed with high elongation at break and low-temperature crack resistance through the synergistic effect of a flexible network of the core layer and a rigid-flexible gradient structure of the shell layer. The nano cellulose and the polyester staple fiber form a dual-scale reinforcing system, so that cracks are bridged, and stress is dispersed; and the modified mica powder and fumed silica are compounded to improve the compactness and wear resistance of the coating.

The invention relates to the technical field of films, in particular to a high-surface tension aluminized base film and a preparation method thereof. The method comprises the following steps: grafting modified fumed silica with a silane coupling agent KH-570, and grafting a ternary polymerization shell layer composed of 2-acrylamide-2-methylpropanesulfonic acid, lauryl methacrylate and glycidyl methacrylate on the surface of the modified fumed silica to obtain organic anti-sticking silica; secondly, synthesizing an aromatic sulfonated polyester prepolymer, loading nano titanium dioxide, and carrying out melt blending extrusion with polypropylene to form polar cluster polypropylene master batches; and finally, blending polypropylene resin, the master batch and maleic anhydride grafted polypropylene, and carrying out melt extrusion, air cooling and slow cooling and two-way stretching molding. The obtained base film is high in surface tension, high in aluminized layer adhesive force, excellent in oxygen and water vapor barrier property, good in thermal stability and suitable for the field of high-end packaging.