757 results about "Emulsion polymerisation" patented technology

This case relates to a self-healing optical film and its preparation method. The optical film is made by adding a nanoparticle suspension to PET masterbatch as the main material during its melt extrusion process, resulting in a cast sheet. After biaxial stretching, a self-healing coating liquid is coated online, followed by shaping and cooling. The nanoparticle suspension includes nano-titanium oxide, MAH-PET polymer, ATO nanoparticles, and titanate coupling agent. The self-healing coating liquid is produced by core-shell emulsion polymerization, forming a nano-silica hard core and an acrylate functional monomer polymer soft shell. This invention adds the nanoparticle suspension by in-situ feeding in the middle of the extruder, reducing steps, improving dispersion uniformity, and making the film surface smoother. Then, the self-healing coating liquid is applied online after longitudinal stretching and before transverse stretching, forming a film on the film surface, improving the hardness and scratch resistance of the film material, enabling rapid self-healing at room temperature, strong stability, and avoiding the occurrence of rainbow patterns.

The invention discloses an uvioresistant acrylic resin coating and a preparation method thereof, and belongs to the technical field of acrylic resin paints.The uvioresistant acrylic resin coating is characterized in that step-by-step functional design is adopted, a functional polyurethane prepolymer is constructed through prepolymerization reaction and double-bond end capping, fluorosilicone modified acrylate emulsion is prepared through a core-shell emulsion polymerization process, and the uvioresistant acrylic resin coating is obtained. Then carrying out surface silane modification on hexagonal boron nitride and carrying out composite coating to obtain a modified boron nitride auxiliary agent; and finally, carrying out composite emulsification and dispersion compounding on all the components to obtain the anti-ultraviolet acrylic resin coating. Through the synergistic enhancement effect of the fluorosilicone modified core-shell structure and the surface modified boron nitride, the ultraviolet aging resistance and the insulation reliability of the coating are remarkably improved on the basis of keeping high adhesive force, excellent flexibility and impact resistance of the coating; the problems that a traditional acrylic coating is prone to yellowing and pulverization under long-term ultraviolet radiation, and the mechanical property is reduced are effectively solved, and the acrylic coating is suitable for the field of electronic equipment protective coatings with high requirements for weather resistance, mechanical strength and electrical insulating property.

The invention relates to the technical field of in-vitro diagnostic kits, in particular to carboxyl polystyrene microspheres, a preparation method and application of the carboxyl polystyrene microspheres in a kit for quantitatively detecting MxA. The preparation method of the carboxyl polystyrene microspheres comprises the steps that firstly, polystyrene microspheres with the surface rich in aldehyde groups are prepared through a soap-free emulsion polymerization method; then carrying out a Schiff alkali reaction with 2-aminoethyl methacrylate hydrochloride to carry out double bond modification on the surface of the microsphere, and meanwhile, improving the hydrophilicity of the microsphere by an ester group and an imino group; and finally, carrying out sulfydryl-double bond addition reaction on the polystyrene microspheres and mercaptosuccinic acid to generate the polystyrene microspheres rich in carboxyl on the surfaces. The carboxyl polystyrene microspheres prepared by the invention can improve the binding efficiency of latex and an MxA antibody, so that the detection sensitivity is improved, the purpose of high-sensitivity quantitative detection of MxA protein can be achieved, and the detection time is greatly shortened.

The invention provides an environment-friendly water-based acrylic emulsion adhesive without containing an organic solvent. The environment-friendly water-based acrylic emulsion adhesive is prepared from the following raw materials: 55-60 wt% of eleostearic acid hydroxyethyl acrylate (TMA), 15-25 wt% of butyl acrylate (BA), 3-10 wt% of acrylic acid (AA), 2-5 wt% of a cross-linking agent, 3-8 wt% of modified soil and 0.5-1 wt% of an initiator as a solid phase; the liquid phase is deionized water, and the environment-friendly water-based acrylic emulsion adhesive is prepared through semi-continuous emulsion polymerization. The prepared environment-friendly water-based acrylic emulsion adhesive is high in biodegradability and low in VOC content, has the mechanical property matched with that of a traditional acrylic emulsion adhesive and also has the self-repairing capacity, waste materials can be treated by changing the temperature or pH condition, the environment-friendly water-based acrylic emulsion adhesive can be recycled for multiple times, and the recycling cost is reduced.

The invention relates to a water shutoff profile control agent and a preparation method thereof, and belongs to the technical field of oilfield chemicals. The water shutoff profile control agent is prepared by inverse emulsion polymerization reaction, and is prepared from the following raw materials: a water phase solution, an oil phase solution and an initiator, the water-phase solution comprises acrylamide, an anionic monomer, a cationic monomer, a temperature-resistant salt-resistant monomer, a cross-linking agent, a silane coupling agent modified carbon nanotube, a reinforcing agent, modified tannic acid and water; the oil phase solution comprises base oil and an emulsifier. The water shutoff and profile control agent prepared by adding the silane coupling agent modified carbon nanotubes, the reinforcing agent and the modified tannic acid in inverse emulsion polymerization is good in injectivity, high in strength after water absorption and swelling, controllable in swelling time, capable of achieving secondary crosslinking under the high-temperature and high-salt condition, and good in water shutoff and profile control effect. The plugging agent not only can be matched with oil layers with different permeability and heterogeneous stratums, but also can be well adapted to plugging of deep well ducts with higher pressure and higher depth, and the plugging effect is more excellent.

The invention discloses a modified acrylate emulsion adhesive as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The modified acrylate emulsion adhesive is prepared by adopting a semi-continuous emulsion polymerization method. The water-based adhesive is prepared from the following raw materials in parts by weight: 5-20 parts of water-based polyolefin, 50-200 parts of deionized water, 0.5-4 parts of an emulsifier, 20-50 parts of an acrylate monomer, 1-10 parts of an acrylic monomer, 0.2-1.5 parts of an initiator, 0-50 parts of styrene, 0.1-2 parts of a cross-linking agent and 0.5-15 parts of a neutralizer. The modified acrylate emulsion adhesive is obtained by taking the water-based polyolefin as a core structure of the emulsion and taking the acrylate polymer as a shell structure of the emulsion, and the adhesive has good compatibility with a polyolefin diaphragm and an electrolyte, so that the synergism of a lithium ion battery negative electrode, the electrolyte and the diaphragm is promoted; further, the electrochemical performance of the lithium ion battery is improved.

The invention relates to high-adhesion weather-resistant water-based ink and a preparation process thereof, and relates to the field of ink materials and preparation, and the high-adhesion weather-resistant water-based ink is prepared from the following raw materials in parts by mass: 25-40 parts of waterborne polyurethane, 10-20 parts of waterborne acrylate, 35-50 parts of water-based color paste, 1-4 parts of auxiliaries and water; the water-based acrylate is obtained through emulsion polymerization, and polymeric monomers comprise epoxy acrylate, hydroxyethyl acrylate, pentaerythritol tetraacrylate and acrylic acid; the epoxy acrylate comprises fatty acid modified epoxy diacrylate. The preparation method comprises the following steps: adding the water-based polyurethane resin and the water-based acrylate into water, stirring, adding the water-based color paste, stirring, adding the auxiliary agent, stirring, adjusting the viscosity, stirring, and filtering to obtain the high-adhesion weather-resistant water-based ink. The water-based ink has the effect of improving the adhesive force and weather resistance of the water-based ink.

The invention discloses an anti-ultraviolet nano-material, which is characterized in that nano-spheres with uniform and controllable size and anti-ultraviolet capability are prepared by utilizing reverse microemulsion polymerization reaction and adopting a one-pot method. The preparation process is simple, the process is safe, and the use of halogen compounds is not involved. Only 1-5wt% of the nanospheres prepared by the invention are added, so that the waterborne epoxy coating has enhanced mechanical properties and ultraviolet resistance.

The invention discloses an embolism microsphere and a preparation method thereof.The embolism microsphere is prepared through the following steps that a polycarboxylate microsphere is prepared by combining a free radical polymerization method and an emulsion polymerization method, and the polycarboxylate microsphere is obtained; and saponifying and hydrolyzing the polycarboxylate microspheres to hydrolyze the polycarboxylate microspheres to obtain hydroxyl polymer microspheres, and introducing an acidic group onto the hydroxyl polymer microspheres to obtain the embolism microspheres containing both the hydroxyl group and the acidic group. The embolism microsphere disclosed by the invention realizes high loading capacity and controllable release of the anti-tumor drug, realizes accurate embolism in blood flow, and improves the treatment effect of the drug.

The invention belongs to the technical field of thermal shrinkage label films, and particularly relates to a preparation method of a water-washing removable PETG label adhesive and application of a product of the water-washing removable PETG label adhesive, the water-washing removable PETG label adhesive is formed by adopting an emulsion polymerization method on the basis of PSt / P (BA-MMA) core-shell structure emulsion, and the application of the adhesive in PETG labels is provided. The problems that an existing adhesive is high in adhesive capacity and serious in residue are solved, the balance of adhesive force and cohesive force is achieved through the core-shell microsphere structure, the wetting power with a base material is reduced, the compatibility with the base material is reduced, and the performance that the adhesive is removed by washing is improved.

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 application discloses large-diameter core-shell polymer particles, a preparation method and application thereof. The large-diameter core-shell polymer particles have a particle size of 1-50 microns; the structure of the particles comprises a water-insoluble soft substance layer and a hard substance layer, and the weight ratio of the soft substance layer to the hard substance layer is 1:0.1-10, and the hard substance layer is located at the outer layer of the soft substance layer. The particles are prepared by using a modified aqueous suspension polymerization and / or emulsion polymerization method. The obtained particles can improve the hardness of an electric core, inhibit the deformation of the electric core, and do not affect the air permeability. Compared with general micron-level homogeneous polymer particles, the particles provided by the application have a soft core and hard shell structure, which is also beneficial to improving the performance of a diaphragm. The hard substance layer located at the outer layer of the particles ensures that the diaphragm coating is not sticky after drying, so that the diaphragms are not adhered to each other after being wound. The soft substance layer located at the inner layer of the particles can provide strong adhesion, so that the diaphragm and the pole piece have higher peeling strength.

The invention belongs to the field of digital ink jet, and discloses a preparation method of a colored nano resin particle dispersion and application of the colored nano resin particle dispersion in digital ink jet. By adopting a cosolvent method, the solubility of the pigment is improved by adding a cosolvent into a monomer, and the coating rate of the pigment is increased. Meanwhile, special monomers are not needed, common traditional emulsion polymerization monomers can be used, the manufacturing process is simple, neck clamping is not prone to occurring, and reaction control is easy. According to the invention, the pigment is coated by an emulsion polymerization technology to obtain the colored nano resin particle dispersion, the digital ink-jet ink is prepared from the colored nano resin particle dispersion, and the ink layer of the digital ink-jet ink has better water resistance, light resistance and migration resistance compared with the traditional dye ink, and has good adhesiveness.

The invention discloses a plastic-free low-shrinkage waterproof oil-proof barrier type modified acrylate emulsion and a preparation method thereof, the plastic-free low-shrinkage waterproof oil-proof barrier type modified acrylate emulsion comprises the following raw materials by mass: 3-12 parts of a nano dispersion, 13-42 parts of a hard monomer, 30-55 parts of a soft monomer, 3-10 parts of a silicon-containing monomer, 4-12 parts of a polyfunctional monomer, 0.1-3 parts of an initiator, and 2-13 parts of a reactive emulsifier; the modified acrylate emulsion is prepared from a nano dispersion, a hard monomer, a soft monomer, a silicon-containing monomer, a polyfunctional monomer, an initiator and a reactive emulsifier through soap-free emulsion polymerization. The plastic-free low-shrinkage waterproof oil-proof barrier emulsion is prepared through soap-free emulsion polymerization, the prepared emulsion is small in particle size, can form a dense film after being coated on the surface of paper, and has good barrier performance on water vapor, oil and the like; according to the plastic-free low-shrinkage waterproof oil-proof barrier emulsion, a polyfunctional structure, especially structures containing-COOH,-OH,-NH2,-NH-C (= O)-NH-and the like, is introduced into a molecular structure, so that the emulsion has good adhesion to paper-based fibers.

The invention provides an environment-friendly water-based pressure-sensitive adhesive as well as a synthesis method and application thereof. The environment-friendly water-based pressure-sensitive adhesive comprises a dehydroabietic acid-based acrylate derivative grafted acrylate emulsion and a rosin emulsion, wherein the acrylate emulsion is prepared from an acrylate monomer, a dehydroabietic acid-based acrylate derivative monomer, an emulsifier, an initiator and water through an emulsion polymerization reaction. The dehydroabietic acid-based acrylate derivative monomer is prepared from a rosin derivative dehydroabietic acid and a hydroxyl acrylate monomer through an esterification reaction; according to the environment-friendly water-based pressure-sensitive adhesive, the synthesis method and the application thereof, the comprehensive performance of the acrylate pressure-sensitive adhesive is improved, the environment-friendly water-based acrylate pressure-sensitive adhesive is developed, the rosin derivative is added as a synthesis or compounding raw material, dependence on fossil raw materials is reduced, and meanwhile, the environment-friendly water-based acrylate pressure-sensitive adhesive is prepared. The comprehensive performance such as initial adhesion and peel strength of the pressure-sensitive adhesive is remarkably improved, and the whole production and use process is free of VOC emission and environmentally friendly.

The invention discloses a stab-resistant energy-absorbing material based on synergistic enhancement of multiple glues and a preparation method of the stab-resistant energy-absorbing material. According to the material, a high-strength polyethylene fiber and aramid fiber mixed woven fabric with the mass ratio of 3: 1 is used as a base material, and thermoplastic polyurethane and ethylene-vinyl acetate copolymer glue are matched. When the cutter punctures, the glue is heated and melted to adhere to the cutter, the woven fabric restrains the cutter to move transversely, and the puncture-proof performance is improved. The fabric has the advantages of being light, flexible and comfortable to wear, the preparation process is simple, and large-scale production is facilitated. During preparation, the fibers are mixed and woven into woven cloth, then the woven cloth is sequentially soaked in two kinds of glue and cured, and finally hot press molding is conducted. By adopting segmented curing, vacuum impregnation and microemulsion polymerization technologies, the binding force of the glue and fibers is enhanced, the performance of the glue is improved, the defects of a traditional stab-resistant material are overcome, and the stab-resistant material has a wide application prospect in the field of protective equipment.

The present invention relates to the technical field of intersection of nanomaterial synthesis and microfluidic reactor engineering, and discloses a polystyrene colloidal photonic crystal nanoparticle, a preparation method and an application. The preparation method of polystyrene colloidal photonic crystal nanoparticles comprises the following steps: preparing an aqueous phase and an oil phase; injecting the aqueous phase and the oil phase into a microfluidic chip at a water-oil flow rate ratio of 10:1, with a total flow rate of 8ml / min-15ml / min; discharging the front-end waste liquid; conducting an emulsion polymerization reaction at 70°C-90°C, and cooling and centrifuging the reaction liquid to obtain polystyrene colloidal photonic crystal nanoparticles. While ensuring high monodispersity and precise size control, the structural regularity of the particles is improved, and high-throughput production is achieved to meet the application requirements of colloidal photonic crystals in the fields of display, sensing and flexible electronics, so as to solve the technical problems of poor product consistency, poor material performance, low production efficiency and high cost.

The invention discloses a polycarboxylate superplasticizer with a linear water-reducing rate as well as a preparation method and application of the polycarboxylate superplasticizer. The water reducing agent is prepared from a polyether macromonomer phosphating derivative, a carboxylic acid monomer, a sulfonic acid monomer, an ester slump retaining monomer, a linear regulation and control monomer and other units through a free radical emulsion polymerization process. Compared with a traditional polycarboxylic acid water reducer, the water reducer has more regular side chain arrangement, higher charge density, higher adsorption capacity and more stable dispersing performance, the water-reducing rate can be linearly increased along with the increase of the mixing amount within the effective mixing amount range, and the water-reducing efficiency is improved. The problem that the concrete fluidity is difficult to control due to nonlinear fluctuation of the water reducing rate of a traditional polycarboxylic acid water reducing agent is solved, and the method has important significance on improving the concrete construction stability and the engineering quality. The product provided by the invention has excellent mud resistance and slump loss resistance besides high linear water-reducing rate, is suitable for various cast-in-place and precast concrete projects, and has remarkable economic value and application prospect.

The invention discloses a high-temperature-resistant perfluoroether elastomer composition and a preparation method thereof. The preparation method of the high-temperature-resistant perfluoroether elastomer composition comprises the following steps: S1, carrying out emulsion polymerization on tetrafluoroethylene, perfluoromethyl vinyl ether, a non-conjugated fluorine diene vulcanization point monomer, a phenyl-containing perfluorodiene vulcanization point monomer and a peroxide initiator according to a preset proportion to obtain a perfluoroether elastomer emulsion; s2, condensing, washing and drying the perfluoroether elastomer emulsion to obtain perfluoroether elastomer micro powder; s3, mixing and thin-passing the perfluoroether elastomer micro powder with a filler, an acid acceptor and a vulcanizing agent in a preset proportion to obtain perfluoroether elastomer mixed rubber; and S4, carrying out compression molding on the perfluoroether elastomer rubber compound, and carrying out secondary vulcanization to obtain the perfluoroether elastomer composition with high temperature resistance and water vapor resistance. The perfluoroether elastomer composition prepared by the invention has the characteristics of high temperature resistance, water vapor resistance and low compression set.

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 application provides a polymer microsphere profile control water plugging agent and a preparation method and application thereof, and the preparation method comprises the following steps: dispersing molybdenum disulfide nanosheets in water, adding a template carrier to form a Pickering emulsion; performing a first polymerization reaction on the Pickering emulsion, polymer monomer A, a RAFT reagent and an initiator to obtain hydrophilic polymer grafted copolymer nanosheets; performing a second polymerization reaction on the hydrophilic polymer grafted copolymer nanosheets, polymer monomer B and an initiator in a solvent to obtain one-side polymer modified nanosheets; removing the template carrier, and performing a third reaction on the one-side polymer modified nanosheets and amino acids in water to obtain the polymer microsphere profile control water plugging agent. The polymer microsphere profile control water plugging agent prepared by the application is resistant to temperature and salt, can enter deep strata, is uniformly distributed in high-permeability layers, has good profile control and water plugging effects, and can improve recovery efficiency.

The application discloses a kind of hydrolysis-resistant acetylacetamide modified polyvinyl alcohol and preparation method thereof, and the preparation method comprises the following steps: double vinyl ketone and first and alcohol amine compound are reacted to generate N-(hydroxyalkyl) acetylacetamide intermediate;Then trichloro cyanogen and N-(hydroxyalkyl) acetylacetamide intermediate are reacted to generate 3,5-bis[acetylacetamide alkoxyl] monochloro s-triazine;Finally, 3,5-bis[acetylacetamide alkoxyl] monochloro s-triazine is reacted with PVA in polar solvent to generate AAM-PVA.The AAM-PVA prepared in the application can be used as a protective colloid for polyvinyl acetate emulsion polymerization, and the prepared emulsion adhesive has obvious improvement in water resistance, tensile strength and stability;The raw materials of the application are cheap and easy to obtain, the preparation process is simple, the reaction conditions are mild, and there is no waste water and waste gas emission.

Inhibitor compositions for abating undesirable emulsion polymerization during processing of hydrocarbon stream laden with reactive vinylic monomers are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor including phenylenediamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to a process stream. The process stream includes an ethylenically unsaturated monomer that is suspended in the bulk-phase and highly polar solvents as distractive distillation solvents.

The invention relates to the technical field of hydrophobic materials, in particular to a water-based acrylate emulsion based on structured hydrophobic particle modification as well as a preparation method and application of the water-based acrylate emulsion. The industrial problems that hydrophobic particles are prone to agglomeration and the hydrophobic effect is not lasting are solved. According to the emulsion, long-chain alkyl silane modified silicon dioxide serves as a structured hydrophobic phase, in-situ hybridization is carried out on the structured hydrophobic phase, a hydrophobic silane coupling agent, an acrylate monomer and the like through a semi-continuous emulsion polymerization method, and a stable micro-nano rough structure and a low-surface-energy surface are successfully constructed in a coating. According to the preparation method, a physical hydrophobic structure and chemical hydrophobic components are ingeniously combined, the prepared emulsion is good in stability, the water contact angle after film forming can reach 110 degrees or above, and the emulsion has excellent static hydrophobic and dynamic moisture-resistant performance and has wide application prospects in the fields of buildings, textiles, leather and the like.

The invention relates to the technical field of coating materials, and particularly discloses a self-healing waterproof coating material and a preparation method thereof.According to the self-healing waterproof coating material and the preparation method thereof, ZrO2 wraps the surface of nano SiO2, and the corrosion resistance and hardness of a coating are improved; then boric acid groups are introduced to the surfaces of inorganic particles, so that the coating material is endowed with an excellent self-healing function; the modified styrene-acrylic emulsion has good hardness, strength and rigidity, but is insufficient in flexibility, the flexibility of the coating material is improved by introducing the organic silicon modified acrylic emulsion, and a polysiloxane chain segment in organic silicon modified acrylic acid improves the chain segment activity of a polymer matrix, so that when the coating is damaged, the service life of the coating material is prolonged, and the service life of the coating material is prolonged. And groups such as carboxyl and amino in a modified styrene-acrylic emulsion polymer chain segment are more easily diffused to a crack interface to promote fracture and recombination of boric acid ester bonds and hydrogen bonds, so that the self-healing function of the coating material is improved.

The invention relates to a building exterior wall coating and a preparation method thereof, and belongs to the technical field of building coatings. The coating is composed of a composite inorganic-organic hybrid film forming base material, a nano composite flame-retardant filler, a bio-based thickener, a photoresponsive hydrophobic aid, a low-foam wetting dispersant and deionized water. Wherein the composite base material forms an interpenetrating network structure through compounding of sodium potassium silicate and phosphate modified polyacrylate emulsion, and has inorganic phase hardness and organic phase flexibility; the nano flame-retardant filler adopts an Mg-Al layered dihydroxy oxide and cerium dioxide core-shell structure, and zinc borate is loaded to realize multi-stage flame retardance. The preparation method comprises ultrasonic-assisted emulsion polymerization, electrostatic self-assembly filler compounding and gradient curing processes, and during construction, a layered spraying and ultraviolet activation combined technology is adopted. The super-hydrophobic self-cleaning flame-retardant coating has excellent flame retardance, super-hydrophobic self-cleaning performance and long-acting weather resistance.

The invention discloses a water-based environment-friendly peelable coating for a glass substrate and a preparation method of the water-based environment-friendly peelable coating, and belongs to the technical field of water-based coatings. The preparation method comprises the following steps: firstly, carrying out chemical modification on polydimethylsiloxane (PDMS) by utilizing a silane coupling agent to prepare K-PDMS with polymerizable double bonds; then carrying out copolymerization on the K-PDMS and an acrylate monomer through an emulsion polymerization method to prepare a water-based acrylic resin emulsion; and finally, mixing the emulsion with deionized water, an auxiliary agent and color paste to prepare a water-based strippable coating, applying the water-based strippable coating to the surface of a glass substrate, and drying to form a strippable coating. According to the present invention, the compatibility problem of PDMS and acrylic resin is fundamentally solved through the chemical bonding manner, such that the obtained coating has advantages of excellent peelability, high mechanical strength, prominent hydrophobicity and good heat resistance, and is especially suitable for the efficient demolding of the glass mold and the temporary surface protection of the glass product.

The invention discloses an elastomer enhancement strategy based on a covalent organic framework nano confinement effect, and belongs to the field of elastomer enhancement. Aiming at the defects of the existing polymer material in mechanical properties or functional characteristics, the COF is introduced into a polymerization system through a dispersion process adaptive to different polymerization reaction characteristics: in emulsion polymerization, the COF is pre-dispersed in an acrylate monomer, and then the solid elastomer is prepared through emulsification, polymerization initiation, demulsification and drying. In condensation polymerization, the COF dispersion liquid is added into the polyurethane prepolymer, and the enhanced elastomer is prepared through chain extension and curing. In free radical polymerization, a COF aqueous dispersion is blended with monomers such as acrylamide, and the composite hydrogel is prepared through thermal initiation polymerization. According to the method, the mechanical strength, the toughness and the functional characteristics of the obtained composite material are remarkably improved by utilizing the regular pore channels and the active surface of the COF.

The invention belongs to the technical field of polyester window films, and particularly relates to a high-transmittance polyester film and a preparation method thereof. The composite window film comprises a wear-resistant layer and a BOPET base material layer, the wear-resistant layer is obtained by curing a coating liquid, and the coating liquid comprises the following raw materials in parts by mass: 100 parts of an epoxy acrylic resin emulsion, 8-12 parts of silane modified silicon dioxide, 3-5 parts of a modifier, 0.1-0.3 part of a light stabilizer and 40-60 parts of water. The modifier is prepared by reacting epoxy cyclohexyl ethyl POSS and amino polyethylene glycol hydroxyl according to a molar ratio of 1: (8.1-8.2), the solid content of the epoxy acrylic resin emulsion is 30-35wt%, and the epoxy acrylic resin emulsion is prepared by carrying out emulsion polymerization on an unsaturated epoxy monomer, a soft monomer and a hard monomer according to mass ratios of (15-25): (20-40): (40-60). The modifier has a flexible spacer arm formed by a rigid nano-sized inorganic siloxane cage core and a polyethylene glycol chain, and the flexible spacer arm acts on the surface of silicon dioxide to play a role in fixing and also plays a role in a three-dimensional barrier to block silicon dioxide agglomeration, and meanwhile, the wear resistance and the light transmittance of the polyester film are improved.

The invention belongs to the technical field of coating preparation and provides a modified high-strength one-component polyurea coating and a preparation method thereof. First, PDA@electrospun carbon nanofibers are prepared by reacting a Tris-HCl buffer solution under alkaline conditions, and the functional properties and interfacial bonding strength of the fibers are enhanced by surface dopamine coating. Secondly, a metal coordination microgel is prepared by an emulsion polymerization method, and a high-strength, corrosion-resistant functional microgel structure is constructed through the synergistic effect of acrylamide monomer, metal salt and benzotriazole. Then, a matrix resin is prepared by reacting isocyanate with an amino-terminated polyether under a nitrogen atmosphere, and its storage stability and curing behavior are regulated by combining a latent amine and a composite blocking agent. Finally, the PDA@nanofibers, the metal coordination microgel and an auxiliary agent are uniformly dispersed in the matrix resin to prepare a modified high-strength one-component polyurea coating suitable for application in complex environments.