332 results about "Polymer emulsion" patented technology

The invention discloses a cement-based aerogel heat preservation and heat insulation coating material for concrete and a spraying construction process of the cement-based aerogel heat preservation and heat insulation coating material, and belongs to the technical field of concrete materials. The coating material is prepared from powder, composite emulsion and water, and the powder is prepared by mixing superfine sand, cement, modified silicon dioxide-carbon nanotube composite aerogel powder, hollow glass beads, nanofibers, graphene nanosheets, an ultraviolet light absorber, a water reducing agent and a defoaming agent. The composite emulsion is composed of an acrylate copolymer emulsion, a polyvinyl acetate-ethylene emulsion, a temperature-sensitive polymer emulsion and a coalescing agent. Based on the multi-stage pore network and multi-component emulsion optimization design and multi-component synergistic effect, the material has good fluidity after being mixed, and has low heat conductivity coefficient, high strength and high toughness after being hardened; the construction technology of high-pressure water flushing and layered spraying is provided, and the method has the advantages of being efficient in construction, stable in quality and the like and can be applied to heat preservation and heat insulation of a concrete structure in a severe environment.

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 present invention relates to an exposed water-based asphalt-based waterproof coating material and a preparation method therefor, and a waterproof laminate. The exposed water-based asphalt-based waterproof coating material comprises anionic emulsified asphalt, a polymer emulsion, a filler, and an auxiliary agent, wherein the anionic emulsified asphalt is prepared by melt-blending matrix asphalt with a composite weather-resistant additive and then emulsifying the resulting blend. The composite weather-resistant additive is a combination of an antioxidant and an ultraviolet absorbent in a mass ratio of 0.5-2:1, and the polymer emulsion is one of or a combination of more than one of a weather-resistant styrene-acrylic emulsion, a weather-resistant pure acrylic emulsion, and a weather-resistant silicone acrylic emulsion. By introducing the antioxidant and the ultraviolet absorbent into the anionic emulsified asphalt, the present invention improves the stability of a waterproof coating material system and avoids a demulsification phenomenon; moreover, by using a weather-resistant polymer emulsion in combination with a filler and an auxiliary agent, the weather resistance of the prepared waterproof coating material is greatly improved; furthermore, by means of the protective effect and the sunlight reflecting effect of white sintered sand adhered to a surface of the coating material, the waterproof system can be used as an exposed product for waterproof construction of buildings that have been in exposed environments for a long time.

The invention discloses a high-crack-resistance self-repairing sprayed concrete composition as well as a preparation method and application thereof. The composition comprises the following components in percentage by mass: 40%-50% of cement, 50%-60% of aggregate, 1%-2% of composite microfibers, 3%-5% of modified polymer emulsion, 1%-2% of an additive, 0.5%-1.5% of a nano reinforced phase and 2%-3% of a self-repairing microcapsule, and also comprises an anti-corrosion additive. The composite microfiber is a mixture of polypropylene and basalt microfiber, and the nano reinforced phase is a compound system of nano calcium carbonate and silicon dioxide. The preparation method comprises the steps of aggregate pretreatment, dry material mixing, wet material preparation, microcapsule introduction and injection molding, the aggregate is pretreated through a silane coupling agent, the cement is formed by compounding ordinary Portland cement and aluminate cement, and the modified polymer emulsion is modified through a siloxane monomer. According to the composition, through the synergistic effect of the composite microfibers, the self-repairing microcapsules and the nano reinforced phase, the crack resistance and the self-repairing capacity are improved, the composition is particularly suitable for a corrosive environment, and the service life of a structure can be prolonged.

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 present invention belongs to the field of new materials and discloses a method for preparing a hydrophobically modified thickener. The method comprises the following steps: Step 1: subjecting a portion of a hydrophobically associating monomer, a portion of a hydrophilic monomer, a portion of a hydrophobic monomer, and a reactive emulsifier to a free radical emulsion polymerization reaction, and after completion of the reaction, adjusting the pH of the reaction system to 4 to 7; Step 2: adding the remaining hydrophobically associating monomer, hydrophilic monomer, and hydrophobic monomer to the reaction system to conduct a free radical emulsion polymerization reaction. This method produces a polymer emulsion with excellent stability, which can maintain long-term stability under high and low temperature conditions. The present invention also discloses a hydrophobically modified thickener and its application.

The invention relates to the field of non-electric refrigeration coatings, and provides a non-electric refrigeration coating and a use method and a preparation method thereof in order to solve the problem that in the prior art, when the coating refrigeration effect is achieved through tetrahedral radiation refrigeration filler, the coating is difficult to be used in the use environment with large pressure. Comprising 40-60 parts of a polymer emulsion, 20-40 parts of a tetrahedral radiation refrigeration filler, 8-12 parts of titanium dioxide, 6-10 parts of hollow glass beads, 15-30 parts of silicon carbide, 6-10 parts of cubic boron nitride and 10-15 parts of water. The tetrahedral radiation refrigeration filler is zirconium oxide; the minimum height of the silicon carbide and the cubic boron nitride is greater than the maximum height of the tetrahedral radiation refrigeration filler. According to the invention, the refrigeration principle of the tetrahedral radiation refrigeration filler is utilized, the silicon carbide and the boron nitride are additionally added, the boron nitride has good visible light and ultraviolet reflectivity, and the high refractive index of the silicon carbide can make up for the reduction of the dosage of titanium dioxide and enhance scattering, so that the coating formed by the coating has better pressure resistance and wear resistance.

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 preparation method comprises the following steps: uniformly mixing 21-30 parts by mass of a polyvinyl alcohol aqueous solution, 42-54 parts by mass of a silicone acrylic polymer emulsion and 10-18 parts by mass of calcium sulfate whiskers, and carrying out spray drying to obtain the rod-like hydrophobic material. When the rod-like hydrophobic material is applied to mortar, after the polyvinyl alcohol film is dissolved in water, the silicone-acrylic polymer particles gather along the surfaces of the calcium sulfate whiskers to form a hydrophobic film. The invention also discloses waterproof mortar and a preparation method thereof. The waterproof mortar is prepared from the following components in parts by mass: 32 to 45 parts of cement, 6 to 16 parts of rod-like hydrophobic substance, 40 to 50 parts of aggregate, 1.0 to 2.6 parts of rod-like early strength agent slow-release substance, 0.2 to 1.0 part of retarder and 0.1 to 0.2 part of cellulose ether. According to the invention, the rod-like hydrophobic substance and the rod-like early strength agent slow-release substance are introduced into a waterproof mortar system to achieve the purposes of water resistance, quick drying, improvement of flexural and compressive strength and improvement of construction efficiency.

The invention relates to the field of printing ink, and discloses cross-linked polymer micronized wax powder for printing ink and a preparation method thereof.According to the printing ink, a wax monomer is introduced into epoxy acrylate, and a core-shell polymer emulsion is prepared through a soap-free core-shell emulsion polymerization method, a polymer formed by butyl acrylate, acrylic acid, a functionalized silane coupling agent and a comonomer is taken as a shell, and the cross-linked polymer micronized wax powder for the ink is prepared by adopting a spray drying process; the functionalized silane coupling agent is prepared by reacting a modified silane coupling agent obtained by reacting vinyltrimethoxysilane with tetramethyldisiloxane with eugenol to prepare an eugenol-based modified silane coupling agent, and then reacting the eugenol-based modified silane coupling agent with isocyano ethyl methacrylate; the comonomer is prepared by reacting eugenol, cardanol and 1, 4-p-xylylene dichloride, and the obtained product has the antibacterial property, water resistance and adhesive force of a shell layer monomer and the mechanical property, heat resistance and antibacterial property of a core layer monomer.

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 application discloses a kind of marine reinforced concrete crack fast self-repairing agent and preparation method thereof, the self-repairing agent includes the following components by mass fraction: polyacrylic acid hydrogel 20-30%, microorganism 5-10%, betaine 20-30%, calcium salt 15-25%, aluminum salt 20-30%.Its preparation method is: acrylic acid monomer is mixed with crosslinking agent, initiator, auxiliary crosslinking agent;Aluminum salt, acrylic acid are mixed to obtain aluminum acrylate;The two are mixed with microorganism and betaine, stirring and heating, and microorganism-polyacrylic acid hydrogel is prepared;After drying, it is broken, and calcium salt powder is wrapped, then immersed in polymer emulsion, dried, and prepared.The application can quickly block cracks by forming organic-inorganic composite repair products, solidify harmful media, release beneficial ions, achieve the dual goal of crack self-repairing and reinforcement corrosion inhibition.

The utility model relates to the technical field of building materials, in particular to a multifunctional composite heat preservation waterproof backing plate which comprises a heat preservation plate, a first non-woven fabric layer and a second non-woven fabric layer. A first non-woven fabric layer and a second non-woven fabric layer are bonded to the two sides of the heat preservation plate through adhesion agents respectively, a first waterproof coating and a second waterproof coating are arranged on the sides, away from the heat preservation plate, of the first non-woven fabric layer and the second non-woven fabric layer respectively, and the first non-woven fabric layer and the second non-woven fabric layer comprise upper non-woven fabric and lower non-woven fabric. A reinforcing layer is arranged between the upper non-woven fabric and the lower non-woven fabric. The first waterproof coating and the second waterproof coating are polymer coatings or silicone coatings. The interface agent is a polymer emulsion, a modified cement-based interface agent or a silane coupling agent. The back lining plate solves the problems that an existing back lining plate is insufficient in structural strength, prone to deformation or damage and incapable of being spliced to meet requirements.

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 discloses a photocatalytic coating based on a zinc sulfide / sepiolite composite material as well as a preparation method and application of the photocatalytic coating. According to the coating, a zinc sulfide / sepiolite composite material serves as a core functional component, a polymer emulsion base material, an auxiliary anion excitation material, an environment-friendly additive system and the like are combined, and efficient degradation of indoor pollutants and lasting release of negative oxygen ions are achieved through a multi-phase synergistic effect mechanism; according to the present invention, the formaldehyde decomposition rate can be significantly increased to more than 90%, the negative oxygen ion release concentration can achieve 3000-10000 / cm < 3 >, and the diversification requirements of people on the indoor air quality improvement can be met due to the radioactive concern and the light dependence of the traditional technology.

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.

Golf ball comprising a layer formed from a vanadium dioxide nano-particle composition; wherein the vanadium dioxide nano-particle composition comprises a polymer composition and one of a plurality of vanadium dioxide composite nano-particles, a vanadium dioxide composite nano-particle slurry, or a mixture of a polymer emulsion and the vanadium dioxide composite nano-particle slurry. Non-limiting examples of suitable polymer compositions include latexes, lacquers, enamels, acrylics, an epoxies, polyesters, urethane acrylates, polyester acrylates, alkyds, thermoset polyurethane compositions, thermoplastic polyurethane compositions, and / or ionomer compositions. The vanadium dioxide composite nano-particle slurry may be formed from a plurality of vanadium dioxide composite nano-particles that are dispersed throughout a dispersion medium. The polymer emulsion may comprise an aqueous dispersion or an emulsion of polymer resin.

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 belongs to the technical field of thermal insulation materials, and particularly relates to a fiber foam composite material and a preparation method thereof, and the preparation method of the fiber foam composite material comprises the following steps: S1, spraying a foaming material liquid on a fiber felt, and then foaming to obtain foaming fibers; s2, the foamed fibers are subjected to heat treatment, then sealing material liquid is sprayed, and finally drying is conducted; wherein the foaming material liquid comprises the following components: foaming microspheres, a polymer emulsion A and an auxiliary agent A; the sealing material liquid comprises the following components: a polymer emulsion B and an auxiliary agent B; based on the total mass of the fiber felt, the foaming material liquid and the sealing material liquid, the mass ratio of the foaming material liquid is not less than 15%. The fiber foam composite material prepared in the invention not only can solve the problem that a fibrofelt heat insulation material does not obstruct heat convection, but also has more excellent heat insulation and mechanical properties.

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.

This invention relates to the field of magnetic nanomaterials technology, specifically to a preparation process and application of a biomagnetic composite material, comprising the following preparation steps: S1, first, permanent magnet spheres and silane coupling agent are mixed uniformly at room temperature, then nano-PEG / Fe3O4 magnetic fluid, polyurethane, polyethylene glycol, dispersant and crosslinking agent are added at 81-90℃, an external magnetic field is applied and ultrasonic stirring is performed; S2, granulation, washing with water, and drying; S3, first, modified nano-sized natural minerals are added to a polymer emulsion, ultrasonically dispersed to obtain a mixed emulsion, then stabilizers, inorganic fillers and additives are added to the mixed emulsion, stirred uniformly to obtain a functional coating; S4, physical coating and drying; S5, magnetization. This invention has a reasonable process and simple preparation. By leaving complex three-dimensional channels on the surface of the permanent magnet spheres, sufficient channels are provided for loading natural mineral nanoparticles, resulting in a good composite effect between the permanent magnet spheres and natural mineral nanoparticles.

This invention provides a high-carboxylic acid content carboxylated styrene-butadiene latex and its synthesis method, belonging to the field of polymer emulsion preparation. The method uses fatty amine polyoxyethylene ether oxide, long-chain alkyl quaternary ammonium salt, or long-chain alkyl quaternary ammonium base as co-emulsifiers, and involves carboxylic acid monomer treatment and emulsion polymerization steps. The surfactants fatty amine polyoxyethylene ether oxide, long-chain alkyl quaternary ammonium salt, or long-chain alkyl quaternary ammonium base act as co-emulsifiers in the emulsion polymerization system, interacting with carboxyl-containing monomers to increase the binding degree between the carboxylic acid monomers and other monomers such as conjugated dienes and styrene. This significantly increases the carboxylic acid group content in the latex polymer and improves the stability of the reaction system. The carboxylated styrene-butadiene latex prepared by this invention has a bound carboxylic acid content of 9%-15%. This invention effectively solves the technical problems of low carboxylic acid content and poor emulsion stability in traditional carboxylated styrene-butadiene latexes.

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.