34 results about "Emulsion polymerization" patented technology

The invention relates to a salt-resistant thickening agent and fracturing fluid. The thickening agent is obtained by inverse emulsion polymerization; the inverse emulsion comprises a water phase solution; the water-phase solution is prepared from the following raw material components: methacryloylethyl sulfobetaine, a sulfonic acid group-containing monomer, acrylamide and acrylic acid; wherein the content of the methacryloylethyl sulfobetaine is 4 to 6 parts by weight, the content of the sulfonic acid group-containing monomer is 3 to 5 parts by weight, the content of the acrylamide is 15 to 20 parts by weight, and the content of the acrylic acid is 1 to 3 parts by weight. According to the thickening agent, the tackifying performance of a high-molecular polymer and the salt resistance of a viscoelastic surfactant are combined, a salt-resistant functional group sulfonic acid group and an amphoteric functional group betaine are introduced into molecules of the thickening agent, and the thickening agent obtained through inverse emulsion polymerization has good thickening, salt-resistant and calcium-resistant effects.

The invention discloses an acrylate emulsion containing a zinc ion crosslinking agent and a preparation method of the acrylate emulsion, and alkali-soluble resin containing zinc ions is used as a macromolecular surfactant to prepare a self-crosslinking polyacrylate emulsion. In the emulsion polymerization process, a Zn < 2 + > metal ion cross-linking agent is introduced, so that the problem of demulsification caused by damage of high-valence metal cations in the metal ion cross-linking agent to double electric layers of the anionic acrylic emulsion is solved, the degree of cross-linking of a latex film is remarkably improved, the fineness and the particle size of the emulsion are effectively reduced, and the preparation method is simple and easy to implement. And the latex film is endowed with a certain antibacterial function.

The invention discloses a preparation method of a high-acrylic-acid-content polyacrylamide / acrylic acid copolymer emulsion for improving the recovery efficiency of a high-temperature and high-salt oil reservoir, and belongs to the technical field of oilfield chemistry and functional polymer materials. According to the method, a reversed-phase microemulsion polymerization system is adopted, a combination of a cationic surfactant hexadecyl trimethyl ammonium bromide and an amphiphilic initiator azodiisobutyronitrile is introduced, an electrostatic enrichment effect is generated at a water core interface, and acrylate anions are selectively adsorbed and locally concentrated, so that the reactivity rate of a monomer is regulated and controlled, and the amphiphilic polymer is prepared. And the grafting proportion of acrylic acid in the copolymer is obviously improved. The method is simple in process and mild in condition, and the obtained emulsion has the advantages of being high in solid content, good in storage stability, fast in dissolution, free of fisheye and the like, is suitable for high-temperature and high-salinity oil reservoir conditions and has good industrial application prospects.

This invention discloses an anionic hydroxyl silicone oil emulsion and its preparation method, relating to the field of polysiloxane emulsion technology, and belonging to patent classification number C08G77 / 04. The preparation method is as follows: Triethanolamine dodecylbenzenesulfonate salt, tridecyl alcohol polyether, and deionized water are mixed and dissolved, heated, and polydimethylsiloxane alcohol is added under high-speed shearing for homogenization. Water is added and the reaction is maintained at a constant temperature to obtain a basic emulsion. γ-(methacryloyloxy)propyltrimethoxysilane is added dropwise to react and obtain an interface-reinforced emulsion. Acrylamide, N-hydroxymethylacrylamide, etc., are pre-emulsified and then added to the interface-reinforced emulsion with ammonium persulfate under nitrogen protection. Polymerization forms a cross-linked polymer shell. After cooling, tert-butylhydroquinone and disodium ethylenediaminetetraacetate are added to obtain an antioxidant emulsion. Phenoxyethanol and octyl glycol are added to obtain the final emulsion. This method significantly improves the thermal stability of the emulsion through the synergistic effects of composite emulsification, interface reinforcement, shell protection, and antioxidant properties, making it suitable for high-temperature environments.

The invention discloses a high-stability non-fluorine polymer waterproof and oil-proof agent and a preparation method thereof, and belongs to the technical field of functional finishing of textiles. The waterproof and oil-proof agent is prepared by emulsion polymerization of a long-chain acrylate monomer, a cyclic acrylate monomer, alkylene-containing silane, a chlorine-containing monomer, epoxy-vinyl double-modified silicone oil, nanoparticles, a surfactant, a cosolvent, water and an initiator according to a specific proportion. Epoxy groups in the epoxy-vinyl double-modified silicone oil can neutralize acidic substances generated in the polymerization process, and the storage stability of the emulsion is remarkably improved; meanwhile, vinyl participates in copolymerization, epoxy groups enhance the binding force with the fabric, and the fabric is endowed with excellent waterproof, oil-proof and washable properties by cooperating with silane and nano particles. The product provided by the invention does not contain PFAS, is environment-friendly, and solves the technical problems that the existing fluorine-containing finishing agent is limited in environmental protection and the traditional vinyl chloride / vinylidene chloride emulsion is poor in stability.

The application discloses a multifunctional variable-viscosity slick water fracturing fluid additive, a preparation method and application, relates to the slick water fracturing technical field, and solves the technical problem that the multifunctionalization of the fracturing fluid additive is difficult to be realized through simple compounding, wherein the nano anti-swelling agent particles are added into white oil containing a hydrocarbon-fluorocarbon surfactant mixed emulsified system to obtain an oil phase, the water phase is composed of a water-soluble vinyl monomer aqueous solution and an initiator, the fracturing fluid additive is prepared through high-speed shearing emulsification, nitrogen deoxygenation, reverse-phase emulsion polymerization reaction of oxidation and reduction initiation, and demulsification process of reverse-phase surfactant. The application has the anti-swelling performance, and the anti-swelling performance is synergistically provided with the ammonium ion in the water phase; the use amount of the ordinary hydrocarbon surfactant is reduced, the surface interfacial activity is good under the reasonable addition amount, and the gel breaking fluid has a relatively low surface interfacial tension.

The invention provides a preparation method of a polymer-based radiation refrigeration material with a porous particle nested structure, and belongs to the technical field of radiation cooling energy-saving structural materials. The preparation method comprises the following steps: preparing a pre-emulsion from the polymer matrix, the diluent and the emulsifier; the polymer matrix is water-insoluble polymer polydimethylsiloxane and the like; preparing dispersion liquid from nano particles and water; adding the dispersion liquid into the pre-emulsion, and violently stirring to obtain a water-in-oil emulsion; and obtaining the polymer-based radiation refrigeration material by an emulsion template method. The internal structure of the material is composed of three photon scattering interfaces with refractive index gradients, including air / polymers, nanoparticles / polymers and air / nanoparticles, and the solar reflectivity greater than 93.0% and the atmospheric window emissivity greater than 96.0% are achieved. According to the material, the temperature is reduced by 5.0 DEG C at the lowest environment temperature in the daytime, and the maximum radiation cooling power can reach 61.0 W / m < 2 >; the temperature is reduced by 16.0 DEG C at night compared with the lowest environment temperature, and the maximum radiation cooling power can reach 105.5 / W m < 2 >.

The application provides a special plastic concrete for circulating fluidized bed boilers and a preparation method thereof. In the binder, vinyl siloxane and octadecyl acrylate functional monomers are used to improve the bonding strength, styrene is used to improve the high-temperature resistance of the binder, and a pre-emulsified semi-continuous emulsion polymerization is used to obtain a polyacrylate thermoplastic resin with a core-shell structure as the binder, thereby improving the pressure resistance, heat insulation, high-temperature resistance and durability.

The invention provides a preparation method of an amphiphilic hybrid silicon-based antifouling coating, which comprises the following steps: S1, co-hydrolyzing a mixed organic silicon monomer and nano silicon dioxide, and adding a catalyst to carry out condensation polymerization to obtain organic-inorganic hybrid silicon resin; s2, reacting polyethylene glycol with a silane coupling agent containing an isocyanate group to obtain a polyethylene glycol prepolymer; s3, mixing the organic-inorganic hybrid silicon resin obtained in the step S1 with the polyethylene glycol prepolymer obtained in the step S2, and adding an amino silane curing agent for cross-linking reaction to obtain the amphiphilic hybrid silicon-based antifouling coating; the preparation method comprises the following steps: copolymerizing nano silicon dioxide serving as an inorganic phase with methylphenyldimethoxysilane, dimethyldiethoxysilane, KH560 and tetraethoxysilane through a water-dropping fixed emulsion polymerization method to synthesize organic-inorganic hybrid silicon resin, and introducing a polyethylene glycol flexible chain segment, so that the coating is endowed with efficient antifouling capacity while the integrity of the coating is maintained.

The invention belongs to the technical field of compositions for treating wells, and particularly relates to a composite waterproof locking agent and application thereof in drilling fluid. The composite waterproof locking agent is formed by compounding a surfactant emulsion and nano polyester particles, wherein the surfactant emulsion is obtained by carrying out core-shell emulsion polymerization on a soft monomer, a hard monomer, a carboxyl-containing functional monomer, a second functional monomer and a fluorine-containing monomer in an emulsifier solution. The hard monomer improves the structural strength of a polymer molecular chain, the soft monomer improves the adhesive force of the polymer molecular chain, a carboxyl hydrophilic group of the carboxyl-containing functional monomer enables the molecular chain to be adsorbed to the surface of tight reservoir rock, and an outward hydrophobic group of the fluorine-containing monomer changes the wettability of the rock. Through the synergistic effect of compounding of the surfactant emulsion and the nano-polyester particles, wetting reversal of the rock surface is realized, so that the capillary resistance is improved, and the nano-particles can block micro-nano pores, reduce the filter loss of the drilling fluid and effectively inhibit water blocking damage.

The invention discloses a macromolecular self-repairing material for a tire and a preparation method of the macromolecular self-repairing material. Comprising 55 to 65 parts of polyurethane modified rubber, 25 to 30 parts of emulsion polymerized styrene-butadiene rubber, 6 to 10 parts of ethylene-acrylate rubber, 12 to 20 parts of composite resin, 10 to 13 parts of naphthenic rubber oil, 7 to 11 parts of hydroxyl-terminated polyisobutene, 25 to 41 parts of composite reinforcing filler, 10 to 15 parts of a composite plasticizer, 1.5 to 2.5 parts of a titanate coupling agent, 1 to 1.5 parts of a vulcanizing agent, 0.5 to 0.8 part of an assistant crosslinker, 0.4 to 0.7 part of a vulcanization accelerator and 1.5 to 2.5 parts of a vulcanization accelerator. The high-molecular self-repairing material for the tire can realize the self-repairing effect of the tire, has excellent durability and adhesive force, greatly improves the anti-puncture and anti-air-leakage functions of the tire, and improves the safety performance of a vehicle.

The invention relates to the technical field of coatings, in particular to a high-stability graphene water-based dispersion liquid and a heat-conducting coating containing the dispersion liquid. The dispersion liquid is prepared by performing multi-stage grinding on a mixed surfactant, a defoaming agent, graphene powder and deionized water, wherein the mixed surfactant is prepared from sodium carboxymethyl cellulose, polyvinyl alcohol and an acrylic acid-acrylate-sulfonate terpolymer according to a ratio of 1: 1: 1; on the basis, an in-situ polymerization and semi-continuous seed emulsion polymerization process is adopted, a dispersion liquid and an acrylate monomer are copolymerized to prepare a modified emulsion, and then the modified emulsion and nano boron nitride premixed slurry are compounded to form the heat-conducting coating. According to the invention, the problems of poor dispersion stability, high interface thermal resistance and the like of graphene in a polymer matrix are effectively solved, and the prepared heat-conducting coating has excellent heat-conducting property, interface bonding strength and process stability, and is suitable for heat management fields such as heat dissipation of electronic devices and the like.

The application discloses a preparation method of a water-based polyurethane / fluorocarbon composite coating with flash rust prevention, stain prevention and self-repairing functions. x The application discloses a preparation method of a water-based polyurethane / fluorocarbon composite coating with flash rust prevention, stain prevention and self-repairing functions.

The present invention discloses a method for preparing a fluorine-containing polymer and a composition thereof, the method comprising the step of aqueous emulsion polymerization of one or more fluorinated monomers, the aqueous emulsion polymerization being performed in the presence of at least one surfactant comprising a monophosphate ester, the monophosphate ester contains an aromatic phenol group of an alkyl chain substituent; the monophosphate does not contain methyl, methylene and methine which are directly connected with an aromatic ring group; the surfactant does not contain methine; the methylene content of the surfactant is lower than 20% in terms of carbon atom number. According to the preparation method of the fluorine-containing polymer, a PFAS substance is not used as a surfactant, so that the preparation method is environment-friendly.

The present invention generally relates to the field of cross-linkable aqueous vinyl polymer dispersions, to a coating composition comprising said cross-linkable aqueous vinyl polymer dispersions; to a paint formulation comprising said cross-linkable aqueous vinyl polymer dispersions; and to an article coated with the coating composition or the paint formulation. In particular, the present invention provides an aqueous vinyl polymer dispersion PD which comprises the following polymers: —1) an aqueous dispersion of a vinyl polymer P1 obtainable by free radical emulsion polymerization of a monomers mixture comprising: a) 5 to 20 wt % acid functional ethylenically unsaturated monomers M1 or precursors thereof; b) 5 to 25 wt % ethylenically unsaturated monomers M2 containing a polyethylene glycol or monoalkoxy polyethylene glycol moiety; c) up to 90 wt % of non-ionic ethylenically unsaturated monomers M3 other than M1 or M2; d) 0 to 10 wt % ethylenically unsaturated monomers M4 with a functional group for cross-linking after film-formation; e) 0 to 10 wt % of at least one chain transfer agent CTA; where the sum of the wt. % of M1+M2+M3+M4+CTA=100 wt %; —2) an aqueous dispersion or solution of a vinyl polymer P2 obtainable by free radical copolymerization of: a) from 25 to 95 wt % of a ethylenically unsaturated monomers M5 selected from the group of N-vinyl amides with general structure (I) where R1 and R2 are alkyl from C1 to C5 and may be connected to form a ring-structure, preferably N-vinyl pyrrolidone or N-vinyl caprolactam; b) from 5 to 75 wt % of non-ionic ethylenically unsaturated monomers M3′ other than M5; c) from 0 to 5 wt % of ethylenically unsaturated monomers M4′ with a functional group for cross-linking after film-formation; d) from 0 to 10 wt % acid functional ethylenically unsaturated monomers M1′ or precursors thereof; e) from 0 to 5 wt % of at least one chain transfer agent CTA′; where the sum of the wt. % of: M5+M3′+M4′+M1′+CTA′=100 wt %; —3) a film-forming vinyl polymer P3 under the form of an aqueous dispersion comprising: i) from 20 to 60 wt % of a water-soluble or water dispersible crosslinkable vinyl oligomer OL obtained by emulsion polymerizing a monomer mixture comprising: 1) at least one acid functional ethylenically unsaturated monomer M1″; 2) at least one ethylenically unsaturated monomer M4″ with functionality for crosslinking upon film-formation, other than M1″; 3) at least one ethylenically unsaturated monomer M3″ other than M1″ and M2″, and 5) optionally, at least one chain transfer agent CTA″, and ii) from 40 to 80 wt % of a high molecular weight vinyl polymer P4 prepared by emulsion polymerizing, in the presence of the water-soluble or water-dispersible crosslinkable vinyl oligomer OL, a monomer mixture comprising: 1) optionally one acid functional ethylenically unsaturated monomer M1′″; 2) optionally one or more ethylenically unsaturated monomers M4″′ with functionality for crosslinking upon film-formation, other than M1′″; 3) at least one ethylenically unsaturated monomer M3′″ other than M1′″ and MT′ and 4) optionally, one or more multifunctional ethylenically unsaturated monomers for pre-crosslinking, M5′″, preferably in an amount less than 5 wt %, —Where the total weight of film-forming vinyl polymer P3=wt. % of the water-soluble or water dispersible crosslinkable vinyl oligomer OL+wt. % of the high molecular weight vinyl polymer P4=i)+ii)=100 wt % and—Where the total weight of the vinyl polymer in the aqueous vinyl polymer dispersion PD=wt. % of the vinyl polymer P1+wt. % of the vinyl polymer P2+wt. % of the film-forming vinyl polymer P3=100 wt %.

The invention discloses a tire tread rubber composition and a preparation method thereof, and belongs to the technical field of rubber compositions. According to the technical scheme, the rubber composition comprises highly branched solution polymerized styrene-butadiene rubber, high trans-butadiene rubber, emulsion polymerized styrene-butadiene rubber and modified carbon black amp. A white carbon black two-phase filler; the modified carbon black is amp; the white carbon black two-phase filler comprises modified carbon black, white carbon black, a silane coupling agent and carbon black amp; the invention discloses a white carbon black two-phase connecting agent. The tire tread rubber composition provided by the invention has wear resistance, grip performance and heat generation performance, and abundant branching sites and carbon black amp of a raw rubber system; the white carbon black two-phase filler is combined to a rubber molecular chain under the action of the silane coupling agent to form a multi-point network whole, so that the wear resistance is improved, and meanwhile, the carbon black is amp; n-rich lone pair electrons of the white carbon black two-phase bonding agent can form coordination complexation with Zn atoms in zinc oxide, S free radicals are captured in the vulcanization reaction, a cross-linking system is further strengthened, the integrity of the composition is improved, and the wear resistance is further improved.

The present invention aims to provide a method for producing an emulsion composition which is excellent in storage stability and can be used as a single-component liquid from the viewpoint of operability, and which forms a coating film on a substrate such as paper or film, the coating film being excellent in water vapor barrier properties. A method for producing an emulsion composition is a method for producing an emulsion composition obtained by emulsion polymerization of a vinyl group-containing monomer mixture (D) in the presence of water (A), a surfactant (B), and paraffin (C) having a melting point in the range of 57°C to 71°C, characterized in that the temperature at which the emulsion polymerization is performed is higher than the melting point of the paraffin (C) present at the time of the emulsion polymerization, and that the following (1) or (2) is satisfied. (1) The surfactant (B) contains a low-molecular emulsifier (B1) having a sodium sulfonate group. (2) Glycerol methacrylate (E) is contained at the time of the emulsion polymerization.

The invention discloses a fluoride-free water repellent synthesized based on an acrylic acid docosyl ester compound. The fluoride-free water repellent is prepared by the following steps: step 1, emulsifying the acrylic acid docosyl ester compound, a functional acrylic monomer, a polar olefin compound, a thiol compound, an acetate compound, a surfactant and water; 2, introducing inert gas into the reactant emulsion, heating to a reaction temperature, adding an initiator, and reacting for a preset time to obtain a fluoride-free water repellent emulsion; and the docosyl acrylate compound is docosyl acrylate or docosyl methacrylate. The water repellent is synthesized by adopting the docosyl acrylate compound as a main monomer, the fluorine-free water repellent emulsion synthesized by adopting an emulsion polymerization method has the solid content of more than 30%, and the fluorine-free water repellent emulsion has excellent storage stability and more excellent hydrophobicity and water repellency.

The present invention relates to a polymer latex obtained by aqueous emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising a) a vinyl aromatic compound; b) a conjugated diene; c) a hydroxyalkyl ester of an ethylenically unsaturated acid in an amount of 2 to 10 wt.-%, based on the total weight of monomers; and d) an ethylenically unsaturated carboxylic acid or a salt thereof in an amount of 0 to 0.15 wt.-%, based on the total weight of monomers; wherein the weight ratio of the vinyl aromatic compound to the conjugated diene is at least 1.3:1, and the polymer latex comprises 2 to 10 wt.-% of a non-ionic surfactant having an HLB of 17 to 19, based on the total weight of monomers. The present invention further relates to a building material, preferably a cement composition, comprising the polymer latex.

The invention belongs to the technical field of water-based coatings, and relates to an amphoteric polyaniline coated silicon dioxide suspension and a preparation method and application thereof.Hydrophobic nano silicon dioxide sol is prepared in the presence of an emulsifier and organic liquid through an improved sol-gel method and an emulsion polymerization technology; carrying out surface grafting by utilizing a silane coupling agent containing an epoxy group to obtain an epoxy functionalized silicon dioxide suspension; then under an acidic low-temperature condition, taking the suspension as a core, enabling aniline, fumaric acid and long-chain hydrophobic silane to be subjected to reactivity reaction under the action of an oxidizing agent, and firmly grafting polyaniline to the surface of silicon dioxide through ring-opening reaction of an epoxy group and an amino group to form an interpenetrating network shell layer with hydrophobic long-chain alkyl and hydrophilic carboxyl. The obtained filler is not additionally added with a surfactant, has good dispersity and hydrophilicity in a water suspension state, and shows super-hydrophobicity and excellent corrosion resistance after being dried into powder, and the filler suspension can be directly added into an anionic water-based coating, so that the physical shielding and electrochemical protection capabilities of the coating are remarkably improved.

This invention belongs to the field of ink preparation technology and provides a scratch-resistant water-based ink and its preparation method. The ink comprises pigments, a film-forming resin emulsion, a water-soluble copolymer solution containing oxazoline groups, a dihydrazide crosslinking agent, a dispersant, a cosolvent, a wetting agent, a defoamer, a leveling agent, a nonionic polyurethane associative thickener, an amine regulator, and water; the film-forming resin emulsion is a multilayer core-shell grafted hybrid emulsion; the preparation method includes: preparing a polyurethane prepolymer from polycarbonate diol, polydimethylsiloxane alcohol, aliphatic diisocyanate, carboxyl diol, hydroxy acrylate, and a chain extender; dispersing and chain-extending the prepolymer with neutralized water; removing the solvent to obtain a polyurethane dispersion; segmented seed emulsion polymerization under ammonium persulfate initiation to form an intermediate layer and an outer layer; grinding and dispersing the pigments and mixing them with the resin emulsion to form the ink; sequentially adding the various additives and crosslinking agents; adjusting the pH; and adding the oxazoline copolymer solution to obtain the finished product.

This invention discloses a biomass-based surfactant-type thickener and its preparation method, belonging to the field of thickener technology. The thickener is prepared by emulsion polymerization using biomass-based surfactants such as dodecyl glucoside or sodium lauryl laurate, along with various monomers, including hydrophobic and hydrophilic monomers. The preparation process includes steps such as forming an initial emulsion aqueous phase, preparing a hydrophobic monomer emulsion, mixing functional monomers to form a composite emulsion, and temperature-controlled dropwise addition reaction. Compared with existing technologies, the thickener of this invention exhibits excellent high-temperature shear viscosity retention and structural recovery performance. Furthermore, being derived from biomass, it is environmentally friendly, readily degradable, and suitable for water-based systems such as latex paints and adhesives.

A process for preparing vinyl acetate-ethylene copolymers in the form of an aqueous dispersion. The process includes providing an aqueous dispersion of vinyl acetate-ethylene copolymers and subjecting the aqueous dispersion of vinyl acetate-ethylene copolymers to radically initiated emulsion polymerization in a continuously operated tubular-reactor. Where one or more dividing plates bearing liquid-permeable openings that are mounted within the tubular-reactor transverse to the flow direction of the reactor contents.

The invention discloses a method for controllably preparing cationic polyelectrolyte nanogel by using an A-B-A triblock copolymer as a template. The method comprises the following steps: dissolving the A-B-A triblock copolymer with polyethylene glycol in the middle and negative polyelectrolyte chain segments at two ends in water to form a template solution; adding a cationic monomer, a cross-linking agent and an initiator into the template, and adjusting the pH to enable the template and the monomer to generate strong electrostatic interaction; carrying out ultraviolet-initiated polymerization under the protection of inert gas, so that monomers are polymerized in an electrostatic confinement space of the template to form a template-nanogel compound; according to the method, the problems that an existing self-assembly method is poor in stability and low in concentration and an emulsion polymerization method uses a surfactant are solved, the method has the advantages of being mild in condition, simple in route, high in universality, high in controllability and easy to achieve large-scale production, and the method is suitable for large-scale production. The prepared nanogel is uniform in size and stable in structure.

A polyvinyl alcohol acrylate dispersion copolymer is provided that is a reaction product of a reactive aqueous solution for emulsion polymerization. The reactive aqueous solution includes: an acryl monomer; a partially hydrolyzed polyvinyl alcohol; one or more water-soluble monomers; and water. The acryl monomer can be an ester of an unsaturated carboxylic acid monomer, an ester of acrylic acid, an ester of methacrylic acid, an acrylate monomer, a methacrylate monomer, or a combination thereof. The one or more water-soluble monomers can be or include a carboxylic acid monomer and / or an amide monomer. Also provided are products utilizing the dispersion copolymer and methods of use and methods of making the dispersion copolymer.

The application discloses a preparation method of high-load dried orange peel essence slow-release microcapsules. The method comprises the following steps: firstly, dissolving composite wall material raw materials in water to obtain an aqueous phase; secondly, mixing dried orange peel essence, vegetable oil and an emulsifier to obtain an oil phase; thirdly, dropping the oil phase into the aqueous phase to form an oil-in-water (W / O) primary emulsion, which is a core liquid; fourthly, dropping the core liquid into an outer oil phase containing a surfactant to emulsify and form a water-in-oil-in-water (W / O / W) double emulsion; fifthly, adding a forming agent solution and performing ionic crosslinking to form gel microcapsules wrapping oil droplets of the essence; and finally, separating, washing and drying to obtain the high-load dried orange peel essence slow-release microcapsules. The composite wall material raw materials are a combination of sodium alginate and pectin. The application realizes the concentration of the essence in the emulsion droplets and the physical isolation of the composite wall material raw materials through a W / O / W double emulsion template, and combines the rapid ionic gelation of the composite wall material raw materials, so that the loading rate of the essence is increased to more than 60%, which is much higher than the loading rate level of a traditional interfacial polymerization method (6.4%) and a conventional emulsion polymerization method (21.8%).

The invention relates to the technical field of tail gas recovery, and discloses a device and a method for recovering butadiene in tail gas of emulsion polymerized styrene-butadiene rubber production equipment.The device comprises a treatment tank, a recovery tank arranged on one side of the treatment tank, a feeding pipe arranged on one side of the treatment tank, and a plurality of supporting discs fixedly connected to the interior of the recovery tank, activated carbon and an oil mist assembly are fixedly connected to the interiors of the multiple supporting discs, and the supporting discs are arranged in the treatment tank; through the use of the oil mist assembly, the gas inlet pipe is connected with an external gas source, gas enters the conical barrel through the fixing disc and the gas outlet pipe, then the gas spirally descends in the conical barrel, after tail gas enters the conical barrel, oil mist and solid particles in the tail gas are gathered in the conical barrel through the spirally descending gas, and the tail gas enters the conical barrel. Therefore, when the tail gas is in contact with the activated carbon, the activated carbon cannot be blocked by the oil mist and the solid particles, so that the activated carbon is prevented from being damaged, and the effect of avoiding damage is achieved.