224 results about "Polymer emulsion" patented technology

The invention relates to the technical field of cement materials, in particular to a red-mud-containing steel slag composite cementing material and a preparation method thereof.The method comprises the steps that red mud, slag, steel slag, desulfurized gypsum and sulphoaluminate cement clinker are subjected to dry mixing to obtain an initial mixture; determining whether the excitation capability of the potential hydration activity reaches the standard or not based on the alkaline matching index, and adjusting the weight part of the sulphoaluminate cement clinker; adding a composite exciting agent to obtain activated slurry; determining whether the dispersion effect of the flocculation structure of the initial mixture is qualified or not based on the dispersion index of the flocculation structure, and adjusting the ball milling rotating speed; adding a polymer emulsion to obtain an initial composite cementing material; determining whether the synergistic enhancement effect of the polymer emulsion and the activated slurry is qualified or not based on the synergistic enhancement index, and adjusting the dripping rate of the polymer emulsion; the steel slag composite cementing material containing the red mud is obtained. The preparation stability of the red mud-containing steel slag composite cementing material is improved.

The invention discloses a polymer emulsion composite modified road base material and a preparation method thereof, and belongs to the technical field of traffic infrastructure engineering materials. The polymer emulsion composite modified road base material is prepared from the following raw materials: graded aggregate, super sulfate cement or geopolymer cement, water for mixing, vinyl acetate-ethylene (VAE) copolymer emulsion and a silane coupling agent. The preparation method comprises the following steps: mixing the VAE emulsion with water for mixing to obtain a polymer diluent; mixing graded aggregate with an inorganic cementing material, then adding the polymer diluent, and mixing to obtain a mixture; and then paving, compacting, forming and curing are carried out. By forming a VAE flexible network-C-S-H / ettringite hybrid network, the material has the remarkable advantages of higher mechanical strength and low cost, and can greatly improve and enhance the crack resistance and durability of the road base.

The invention relates to the field of building materials, and discloses high-toughness and high-energy-absorption polymer emulsion modified mortar and a preparation method thereof, and the mortar is composed of ordinary Portland cement, river sand, a polymer emulsion, water, an active admixture and chopped fibers. Wherein the polymer emulsion is selected from styrene-acrylic emulsion (SBR), ethylene-vinyl acetate (EVA), polyurethane emulsion or a combination thereof; the mixing amount is 5-20wt% of the mass of the cementing material. According to the invention, a viscoelastic network is formed in a cement matrix through the polymer emulsion, and the synergistic effect of the active admixture and the chopped fibers is combined, so that the bonding strength, the crack resistance, the impact resistance and the stress wave dissipation capability of the mortar are remarkably improved. Test results show that the mortar provided by the invention is obviously superior to ordinary mortar in the aspects of 28d breaking strength, impact toughness and stress wave attenuation performance, and is suitable for high-performance constructional engineering and protective engineering.

The invention discloses a bio-based polymer emulsion as well as a preparation method and application thereof, and belongs to the technical field of aqueous polymer emulsions. The emulsion comprises an aqueous continuous phase, bio-based polymer particles, a stabilizing system, and a bionic catechol adhesion component. Specific modified starch is innovatively utilized for assistance, and a bionic adhesion shell layer is constructed on the surface of a bio-based polymer core in situ. Compared with similar products in the market that adhesion to inert substrates can be improved only by adding a large amount of tackifying components, the scheme has the advantages that excellent dry and wet adhesion can be realized on the surfaces of difficult-to-adhere substrates such as polypropylene and polyethylene only by constructing an extremely thin interface functional layer, and the functionalization efficiency and economical efficiency of the bio-based material are greatly improved. Meanwhile, the system effectively overcomes the industrial problem that the high-solid-content emulsion is easy to settle, has excellent storage stability and construction adaptability, and conforms to the development trend of sustainable barrier packaging and high-performance water-based coatings in the future.

The invention relates to the field of building materials, in particular to high-durability and high-permeability-resistance mortar and a preparation method thereof.The high-durability and high-permeability-resistance mortar is prepared from, by weight, 40-60 parts of cement, 20-40 parts of quartz sand or machine-made sand, 10-20 parts of fly ash or mineral powder, 2-5 parts of polymer emulsion, 1-3 parts of an anti-permeability agent, 0.2-1 part of a water reducing agent, 0.1-0.5 part of a water-retention thickening agent and water; wherein the water cement ratio is controlled to be 0.30 to 0.35. Through collaborative optimization of multiple components, the compactness, impermeability, crack resistance and durability of the mortar are remarkably improved, the preparation process is simple and convenient, the raw materials are easy to obtain, and the mortar has excellent comprehensive performance and wide application prospects.

The invention relates to the field of overlay materials, in particular to a two-component overlay material suitable for a modified asphalt concrete pavement and a preparation method of the two-component overlay material. The two-component overlay material suitable for the modified asphalt concrete pavement comprises the following raw materials: a component A: a polymer emulsion, a composite additive, a silane coupling agent, a film-forming agent, an ultraviolet absorbent, a stabilizer and the like; the component B is a polyisocyanate curing agent. The finally prepared two-component overlay material can simultaneously give consideration to comprehensive properties such as adhesion, hydrolysis resistance, weather resistance and saline-alkaline resistance, the phenomenon that other properties are greatly sacrificed for a certain prominent property is avoided, and the overlay material can be ensured to be popularized and applied in various environments and harsh working conditions; the technical level of modified asphalt concrete pavement maintenance is greatly improved, and the application effect is excellent.

The invention discloses aerogel thermal-insulation waterproof mortar and a preparation method thereof. The mortar is prepared from cement, hydrophobic aerogel, interface modified asphalt rubber powder, a composite phase change heat conduction material, blast furnace slag micro powder, silica fume, nano montmorillonite, titanium dioxide aerogel powder, expanded vermiculite, shape memory polymer emulsion, chitosan, charcoal powder, carbon fibers, basalt fibers and the like. The preparation method comprises the following steps: carrying out plasma treatment and modification with an organosilicon waterproofing agent to obtain hydrophobic aerogel; carrying out interface modification on the asphalt rubber powder by adopting a titanate coupling agent; a phase change microcapsule-carbon nanotube heat conduction network is constructed through ball milling compounding; a basic framework is formed by adopting a graded mixing process, and then functional components are introduced; and finally, realizing cross-linking curing of the shape memory polymer and the chitosan through ultrasonic assistance and programmed temperature control. The mortar prepared by the invention realizes integration of multiple functions, and effectively solves the technical problems of single performance and poor durability of a traditional thermal insulation material.

The invention discloses a polymer self-repairing waterproof paint and a use method thereof, and relates to the technical field of waterproof paints.The polymer self-repairing waterproof paint is prepared from cement, carbonized waste aerated building blocks, carbonized copper slag, modified montmorillonite, polymer emulsion, a dispersing agent, a defoaming agent and a flatting agent as main ingredients, and aragonite whiskers dispersed in the carbonized waste aerated building blocks are used for improving the strength of the waterproof paint; silica gel generated by carbonization reacts with cement to generate calcium hydroxide to generate C-S-H with a low calcium-silicon ratio, so that the corrosion resistance and the impermeability of the coating are improved; the carbonized copper slag is doped into the waterproof coating, so that the wear resistance of the waterproof coating is improved, copper ions can achieve an antibacterial effect, silica gel generated after carbonization has relatively high activity, and the cement consumption is further reduced; on one hand, carbon sequestration is realized, and on the other hand, the carbonized waste aerated building blocks and active substances in the copper slag are utilized, so that the strength performance, corrosion resistance, impermeability and wear resistance of the coating are improved, the cement consumption is reduced, and the building material utilization rate of the coating is increased.

Provided is an aqueous based styrene-diene polymer emulsion composition including: i) from 2 to 50 wt. % of one or more polymers including linear polymers characterized by the formula:star polymers characterized by the formula:or combinations thereof; wherein D′, PA, D″, n and X are defined herein; ii) from 0.05 to 5.0 wt. % of one or more surfactants; and iii) the remainder of the composition comprising water. Also provided are an electrode slurry composition for a secondary metal ion battery composition, a secondary metal ion battery anode, a method of improving the life of a secondary metal ion battery, a method of making an aqueous based styrene-diene polymer emulsion composition, and a method of making an electrode slurry composition for a secondary metal ion battery.

The invention discloses a preparation method and application of a double-effect repair material with a scale grading effect and multiple sensitive characteristics. Belongs to the functional material field. The method comprises the following steps: dissolving an emulsifier and an inorganic salt in water, adding acrylamide, a hydrophobic and pH-sensitive monomer, a cross-linking agent and an adhesive functional component, stirring together, adding an initiator, reacting, drying, and crushing to obtain gel powder; the preparation method comprises the following steps: dissolving an emulsifier in water, adding a polymer emulsion and an initiator, uniformly mixing, carrying out a heating reaction to obtain a reaction system, dissolving pH-sensitive long-chain acrylate with an adhesive function and a hydrophilic monomer in water, slowly dropwise adding the solution into the reaction system, carrying out a stirring reaction, adding the polymer emulsion, uniformly mixing, adding an inorganic substance, and carrying out a stirring reaction to obtain the water-based acrylate emulsion. After complete dispersion, dropwise adding a macromolecular coagulant for demulsification, and washing, dehydrating and drying after curing to obtain modified powder; and mixing the gel powder and the modified powder to obtain the double-effect repair material. The method is suitable for plugging and sealing micropores and microchannels in the petrochemical industry gas well development process.

The invention discloses a preparation method of a high-water-resistance super-water-permeability wood lacquer emulsion, and relates to the technical field of water-borne wood lacquer emulsions.The method comprises the steps that a core-forming emulsion V1, a shell-forming emulsion V2, a silane coupling agent solution V3, a priming initiator solution I1, a core-forming emulsifier initiator solution I2 and a shell-forming emulsion initiator solution I3 are prepared respectively; preparing a reaction place R1; preparing a reaction base solution R2; preparing an intermediate emulsion R21; dropwise adding a shell emulsion V2 into the intermediate emulsion R21, dropwise adding a shell emulsion initiator solution I3 at the same time, after dropwise adding, preserving heat for 60 minutes at 83 + / -1 DEG C, and then cooling to 75-80 DEG C for post-treatment to obtain a water-based acrylic core-shell polymer emulsion; on the premise of ensuring good water resistance of a paint film, the prepared polymerizable emulsion system does not influence transparency of the paint film, and a silane coupling agent is introduced in the emulsion polymerization process to improve durability and adhesiveness.

This invention discloses a fissure grouting material, its preparation method, and its application, belonging to the technical field of radiation protection engineering materials. By mass, its raw materials include: 45-60 parts barite sand, 25-35 parts sulfoaluminate cement, 8-20 parts borax, 2-5 parts boron carbide powder, 1-5 parts nano-gadolinium oxide, 5-15 parts lithium slag powder, 3-8 parts barium sulfate whiskers, 3-8 parts polymer emulsion, 0.5-1.5 parts water-reducing agent, 0.1-0.5 parts stabilizer, and 18-25 parts water. This invention provides high-density gamma-ray shielding through barite sand, achieves all-round neutron protection through a quaternary composite neutron absorption system, enhances the material's toughness and shielding effect through barium sulfate whiskers, and ensures high fluidity and interfacial bonding strength of the grout through the polymer emulsion. This material is particularly suitable for sealing and shielding fissures in the surrounding rock of radioactive tunnels, possessing advantages such as excellent shielding effectiveness, good construction performance, high volume stability, and long-term durability.

The invention relates to the technical field of wear-resistant terrace construction, and discloses a construction method of a wear-resistant terrace. The method comprises the following steps: (1) pouring an interface agent on a base layer to obtain an interface agent layer; the interface agent is neat cement paste or a combination of neat cement paste and polymer emulsion; (2) semi-dry slurry containing dry and hard cement mortar is laid on the interface agent layer for fine leveling construction, and a dry and hard cement mortar layer is obtained; the mass ratio of dry hard cement mortar to water in the semi-dry slurry is 100: (7-11); and (3) sequentially arranging a wear-resistant aggregate layer and a curing agent layer on the upper surface of the dry hard cement mortar layer to obtain the wear-resistant floor. By means of the construction method of the wear-resistant floor, one-time precise leveling can be achieved, and the construction period is remarkably shortened.

The present application relates to the technical field of building materials, and particularly relates to a polymer modified silica sand, a preparation method and application thereof.The polymer modified silica sand provided by the present application comprises, by mass fraction, polymer emulsion 2-8 parts, water-soluble resin solution 0.2-2 parts, coupling agent 0.1-0.3 parts and machine-made sand 90-97 parts.The polymer modified silica sand provided by the present application replaces river sand with machine-made sand, and directly coats the polymer emulsion on the surface of sand particles, thereby omitting the spray drying step of traditional redispersible emulsion powder, simplifying the production process of downstream ceramic tile glue, reducing the raw material cost, fundamentally solving the problem of uneven dispersion of emulsion powder in the traditional process, ensuring the stability of the performance of the final product through the prefabrication of uniform polymer film, and significantly improving the bonding strength of the ceramic tile glue after no treatment, water treatment and heat treatment.

The invention discloses a method for preparing a fluorinated ethylene-propylene emulsion, and relates to a polymer emulsion polymerization technology. Comprising the following steps: adding water into a reaction kettle, heating, and replacing with nitrogen to control oxygen; adding perfluoropolyether ammonium carboxylate, heating, adding an initial TFE / HFP mixed monomer, stirring, and adding a potassium persulfate solution to initiate polymerization; supplementing the mixed monomer in the reaction to maintain the pressure, and adding diethyl malonate and a copolymerization composition regulator at the same time; and stopping the reaction after the designed feeding amount is reached. According to the invention, the proportion of copolymerization units can be optimized, high monomer conversion is realized, and the emulsion with high solid content and uniform particle size is obtained.

The application provides a preparation method of a blue light scattering plate, comprising the following steps: preparing a first dispersion liquid precursor containing inorganic sub-micron particles, wherein the material of the inorganic sub-micron particles is a plurality of different inorganic materials, and the particle size of the inorganic sub-micron particles is 120 nm-500 nm; mixing the first dispersion liquid precursor and a polymer emulsion to obtain a first dispersion liquid; preparing a second dispersion liquid precursor containing inorganic nano-particles, wherein the material of the inorganic nano-particles is the same as or different from that of the inorganic sub-micron particles, and the particle size of the inorganic nano-particles is 30 nm-120 nm; mixing the second dispersion liquid precursor and the polymer emulsion to obtain a second dispersion liquid; and preparing the first dispersion liquid and the second dispersion liquid into a blue light scattering plate. The blue light scattering plate prepared by the application has a good Rayleigh scattering effect. The application further provides a blue light scattering plate and application of the blue light scattering plate in a Rayleigh scattering sunlight lamp system.

The invention relates to a high-molecular polymer cement coating for roof waterproofing and a preparation method of the high-molecular polymer cement coating, and belongs to the technical field of waterproof coatings. Wherein the polymer emulsion is prepared from the following raw materials in parts by weight: 40 to 55 parts of acrylate emulsion, 2 to 4 parts of carbon black, 5 to 10 parts of 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 8 to 16 parts of modified fiber and 20 to 35 parts of deionized water; the cement paste is prepared from the following raw materials: 60-75 parts of Portland cement, 10-20 parts of quartz powder, 5-12 parts of ground calcium carbonate, 4-8 parts of cellulose ether, 1-3 parts of calcium formate, 2-6 parts of polycarboxylic acid and 30-35 parts of tap water. The high-molecular polymer cement coating has extremely high tensile strength, impact resistance and cracking resistance, the polymer emulsion and the cement paste are mixed to form an interpenetrating network structure, the high-molecular polymer cement coating has flexibility and weather resistance of an organic polymer and strength and durability of inorganic cement, and the mechanical property, durability and construction performance of the high-molecular polymer cement coating are improved.

The invention provides composite mortar, a preparation method of the composite mortar and a backing plate, and relates to the field of building materials. The composite mortar is prepared from 250 to 500 parts by weight of polymer emulsion, 400 to 700 parts by weight of quartz powder, 382 to 387 parts by weight of heavy calcium powder, 10 to 15 parts by weight of gypsum powder, 1 to 2 parts by weight of a water reducing agent, 0.5 to 2 parts by weight of polyvinyl alcohol and 1 to 2 parts by weight of bentonite. The quartz powder, the ground calcium carbonate powder and the gypsum powder with specific contents in the composite mortar are matched with the polymer emulsion, the polyvinyl alcohol, the water reducing agent and the bentonite, so that the production cost can be controlled at a lower level while rapid hardening, high bonding strength, high breaking strength, smooth construction and multiple protection functions are realized, and the composite mortar does not contain toxic and harmful components and is environment-friendly. The environment-friendly requirement is met.

The invention discloses a composite structure of a shrinkage-resistant and crack-resistant facing material for a building wall surface and a preparation method of the composite structure. The composite structure is sequentially composed of a substrate layer, a crack-resistant reinforcing layer and a functional facing layer. The base layer adopts a cement-based material and a modified additive to provide firm support, the anti-cracking reinforcing layer remarkably improves the tensile strength and inhibits shrinkage cracks through the synergistic effect of high-toughness fibers and elastic polymer emulsion, and the functional facing layer enhances the surface compactness, weather resistance and decoration performance through weather-resistant coating and micro-nano filler. The preparation method comprises the following steps: stirring, coating and initially setting the substrate layer, standing, mixing and rolling the anti-crack reinforcing layer, spraying and curing the functional facing layer, and integrally curing. Test results show that the material has excellent crack resistance and weather resistance in different environments, is simple and convenient to construct and high in adaptability, is suitable for buildings such as outer walls, inner walls and basements, and has wide application prospects and industrial popularization values.

The invention relates to the field of coatings, and particularly discloses a metal texture coating and a preparation method thereof.The metal texture coating is prepared from, by weight, 60-85 parts of polymer emulsion, 20-35 parts of modified aluminum paste, 0.5-1 part of dispersing agent, 0.5-1 part of antioxidant and 10-25 parts of water; the modified aluminum paste is prepared by the following steps: step 1, fully dispersing a coupling agent, a molecular sieve and aluminum paste to obtain a feed liquid; and 2, acidizing polyvinyl alcohol powder, carrying out full contact reaction on the acidized polyvinyl alcohol powder and the vaporous feed liquid, finally adding a surfactant, and uniformly stirring. The preparation method of the metal texture coating comprises the following steps: uniformly mixing and stirring the polymer emulsion, the modified aluminum paste, the dispersing agent, the antioxidant and the water. The coating prepared by the invention is excellent in metal texture, good in glossiness, and excellent in water resistance and adhesive force.

The invention relates to the technical field of road engineering construction, and particularly discloses a ceramic tile adhesive as well as a preparation method and application thereof. The ceramic tile binder comprises sulphoaluminate cement, gypsum, aggregate, rubber powder, a polymer emulsion, an inorganic additive, a waterproof agent, a water reducing agent, a defoaming agent and an air entraining agent, wherein the inorganic additive comprises palygorskite powder, microcrystalline glass powder, calcium formate and calcium nitrite; the polymer emulsion comprises a water-based acrylate emulsion and an ethylene-vinyl acetate copolymer emulsion. The ceramic tile binder has good water resistance, excellent bonding performance and low temperature resistance, the problems that an existing ceramic tile binder is poor in water resistance, low in bonding strength and poor in low temperature resistance are effectively solved, and a new design thought is provided for design of the ceramic tile binder.

The invention relates to a high-performance electroless refrigeration coating containing inorganic radiation slurry and a preparation method thereof. The preparation method comprises the following steps: (1) adding 50 parts of water and 20-30 parts of auxiliaries into a dispersion kettle, sequentially adding 1-2 parts of rare earth metal doped SrAl2O4, 3-5 parts of hexagonal phase aluminum nitride and 1-2 parts of hollow glass beads while stirring, and uniformly stirring to obtain inorganic radiation slurry; and (2) adding 3-4 parts of a thickening agent, 1-2 parts of a dispersing agent, 1-2 parts of a wetting agent and 1-2 parts of a defoaming agent into 100 parts of water, uniformly stirring and dispersing, then adding the inorganic radiation slurry and 50-60 parts of polymer emulsion, and fully and uniformly stirring. The coating forms a multi-direction reflection and radiation surface protruding out of the base surface on the surface of the finish paint, sunlight and environment refracted light can be reflected multiple times, the radiation surface is enlarged, the protrusions face the open outer space, infrared radiation shielding is avoided, and the radiation refrigeration efficiency is high.

The application discloses a preparation method of fiber modified reinforced polymer emulsion and waterproof coating prepared from the fiber modified reinforced polymer emulsion, and belongs to the technical field of coating processing. The preparation method is as follows: styrene, acrylic monomer, deionized water and an emulsifier are mixed and stirred for pre-emulsification; the pre-emulsification product is heated to 70-90 DEG C, an initiator and natural fibers are added, and stirring is carried out for copolymerization reaction, the pH value is adjusted to neutral, and centrifugal separation, washing are carried out to obtain the fiber modified reinforced polymer emulsion. The waterproof coating comprises the fiber modified reinforced polymer emulsion prepared by the preparation method. The waterproof coating prepared by introducing natural fibers for modification in the preparation process of the polymer emulsion has good compatibility and excellent mechanical properties.

The invention discloses a hot-coated high-barrier heavy-wrapping roll film and a preparation method thereof. Belongs to the technical field of packaging materials. The roll film sequentially comprises an outer-layer base material film, a middle barrier layer and an inner-layer heat sealing film. The middle barrier layer is formed by drying and curing nano-composite barrier liquid coated on the inner surface of the outer-layer base material film; the nano-composite barrier liquid comprises polyvinyl alcohol, a surface-modified inorganic nano-material dispersion liquid, a polymer emulsion, a cross-linking agent and a wetting agent. After being preheated, the barrier liquid is coated by micro gravure, is dried through three stages of rapid shaping, deep crosslinking and high-temperature densification in sequence, and is finally compounded with an inner-layer heat-sealing film in a solvent-free manner. Through precise coupling of a synergistic effect among specific components and a multi-stage drying process, the roll film has excellent initial oxygen barrier property, water vapor barrier property, excellent stability in a high-temperature and high-humidity environment and high barrier stability after simulating a dynamic mechanical load of heavy packaging and transportation.

This invention provides an exposed single-component waterproof coating with self-healing function, its preparation method, and its application. The exposed single-component waterproof coating, based on a total weight percentage of 100 wt%, comprises: 25-50 wt% fluorocarbon emulsion, 5-20 wt% microcapsule self-healing agent, 0.1-1 wt% water-resistant agent, 0.1-3 wt% film-forming aid, 0.1-1 wt% stabilizer, 0.1-1 wt% bactericide and preservative, with the balance being water. The fluorocarbon emulsion is a core-shell polymer emulsion. The outer shell is formed by emulsion polymerization of fluorinated acrylate monomers, furan-structured monomers, and maleimide-structured monomers, while the core is formed by emulsion polymerization of soft acrylate monomers and hard acrylate monomers. The emulsion polymerization is carried out in an aqueous solution containing emulsifiers and initiators. The microcapsule self-healing agent has a core-shell structure, including a urea-formaldehyde resin shell and a fluorooil core material encapsulated within the urea-formaldehyde resin shell.

The application provides a water-based non-cured rubber asphalt waterproof coating and a preparation method thereof, and belongs to the technical field of building waterproof materials.The waterproof coating comprises the following raw materials in parts by weight: asphalt 50-60 parts, a compatilizer 20-30 parts, a modifier 9-14 parts, a tackifier 3-5 parts, a coupling agent 1.5-2.5 parts, water 50-60 parts, an emulsifier 3-5 parts and a stabilizer 0.2-0.5 parts; the modifier is a thermoplastic elastomer and a high molecular polymer emulsion.The application also provides a preparation method of the water-based non-cured rubber asphalt waterproof coating.The coating can be applied at normal temperature without heating, the performance of the coating is equivalent to that of a hot-melt non-cured rubber asphalt waterproof coating, and the corrosion resistance, the flame resistance and the adhesion of the base layer of the coating are improved.

The invention provides a preparation method of an acrylic emulsion. Raw materials for preparing the acrylic emulsion comprise an acrylate monomer, a functional monomer, a crosslinking monomer, an emulsifier and a solvent, the functional monomer comprises a hydroxyl monomer and an amido monomer, and the mass ratio of the hydroxyl monomer to the amido monomer is (2-6): 1; the preparation method of the acrylic emulsion comprises the following steps: S1, mixing a part of acrylate monomers and a part of functional monomers to prepare a core layer pre-emulsion; then mixing a part of the emulsifier, a part of the solvent, a part of the core layer pre-emulsion and the initiator solution at the temperature of 80-85 DEG C to prepare a seed emulsion; then, under the condition that the temperature is 82 to 85 DEG C, dropwise adding the residual core layer pre-emulsion into the seed emulsion to prepare a core layer polymer emulsion; s2, mixing the residual acrylate monomer, the residual functional monomer and the crosslinking monomer to prepare a shell layer pre-emulsion; under the condition that the temperature is 82-85 DEG C, the shell layer pre-emulsion is dropwise added into the core layer polymer emulsion, and the polymer emulsion is prepared. A paint film formed by the acrylic emulsion has relatively good hardness, adhesive force, impact resistance, MEK wiping resistance and salt fog resistance, and after the paint film is boiled in boiling water for 1 hour, the paint film still has good impact resistance and MEK wiping resistance.

The invention relates to the technical field of road engineering, in particular to induction heating self-repairing asphalt concrete and a preparation and repairing method thereof. The induction heating self-repairing asphalt concrete is prepared from 75 to 83.5 parts of heat shielding functional coating coarse aggregate, 12 to 15 parts of fine aggregate and 4.5 to 10 parts of mineral powder, the heat shielding functional coating coarse aggregate comprises a heat shielding material, a polymer emulsion and a coarse aggregate. The heat shielding functional coating coarse aggregate further comprises 3-6 parts of asphalt and 1-4 parts of a high-conductivity material. According to the induction heating self-repairing asphalt concrete disclosed by the invention, the temperature of asphalt mortar can be quickly increased to 130-160 DEG C by utilizing an alternating electromagnetic field, and micro cracks are quickly repaired through flowing of asphalt; the used heat shielding function coating coarse aggregate can enhance the bonding effect of the aggregate, reduce abrasion and breakage of the aggregate in the forming process, regulate and control heat flow conduction and energy distribution, reduce heat loss and ensure that asphalt mortar is in a high-temperature flowing state for a long time, so that the induction heating self-repairing efficiency of the asphalt concrete is improved.

The application belongs to the technical field of photovoltaic modules, and provides a preparation method of a photovoltaic module, which comprises the following steps: adding appropriate amounts of wetting agent, dispersing agent and coupling agent into a solvent and fully mixing; then adding appropriate amounts of reflective fillers with a particle size of 0.1-2 microns and uniformly dispersing; continuously adding appropriate amounts of polymer emulsion, film-forming aid and transesterification enhancer and uniformly stirring to prepare a high-reflection coating; wherein the volume concentration of the reflective fillers in the high-reflection coating is 20-80%; then spraying the high-reflection coating on the inner surface of a back plate and solidifying to form a high-reflection coating layer with a thickness of 7-10 microns; and then sequentially stacking the back plate coated with the high-reflection coating layer, EVA adhesive film, cell piece, transparent adhesive film and photovoltaic glass, heating and laminating, cross-linking and solidifying the high-reflection coating layer and the EVA adhesive film again to prepare the photovoltaic module. The prepared photovoltaic module has excellent reflectivity and peeling strength, and the output power is obviously increased, and the problems of uneven distribution of fillers, cell piece hidden cracking, white overflow and wrinkle of the existing white adhesive film are overcome.

This application relates to the field of decorative concrete technology, specifically disclosing a decorative concrete containing a photosensitive color-changing material and its preparation method. The decorative concrete is mainly made from the following raw materials: water, cement, desulfurized gypsum, river sand, photosensitive color-changing material, auxiliary inorganic pigments, water-reducing agent, defoamer, expanding agent, polymer emulsion, polypropylene fiber, and calcium sulfate whiskers. The photosensitive color-changing material is obtained by sequentially coating the surface of river sand with an inner titanium dioxide layer, a silicon dioxide layer, and an outer titanium dioxide layer, followed by treatment with oleylpropyl dimethyl betaine and vinyl-tris(2-methoxyethoxy)silane. This decorative concrete, through the synergistic effect between the raw materials, not only has color but also changes color under visible or ultraviolet light, while also possessing high mechanical strength, meeting market demands.