1013 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 discloses a lignin fiber reinforced environment-friendly asphalt mixture and a preparation method thereof, belongs to the technical field of asphalt preparation, and is used for solving the technical problem that the high temperature resistance and the tensile property of an asphalt mixture in the prior art need to be further improved. The composite lignin fiber modified asphalt is prepared from the following raw materials in parts by weight: 5 to 6 parts of matrix asphalt, 3 to 5 parts of composite lignin fiber, 2 to 4 parts of composite hollow microspheres and 81 to 102 parts of auxiliary materials, an organic metal framework is modified by utilizing a silane coupling agent, and a stable modification structure is formed on the modified lignin fiber by a modified hydrophobic framework through hydrolysis under an alkaline condition, so that the composite lignin fiber modified asphalt is obtained. The composite hollow microspheres are prepared through an emulsion polymerization method, and the composite hollow microspheres and the composite hollow microspheres are used as additives to be mixed with materials, so that the high-performance asphalt composite material is finally prepared.

The invention belongs to the technical field of building materials, and discloses an early-strength polymer modified cement-based grouting material and a preparation method thereof. The grouting material disclosed by the invention is prepared from the following raw materials in parts by weight: 100 to 115 parts of a cementing material, 100 to 115 parts of river sand, 20 to 23 parts of water, 2 to 2.5 parts of a water reducing agent, 0.02 to 0.04 part of an expanding agent, 0.22 to 1.76 parts of an acrylic emulsion and 0.04 to 0.08 part of a de-foaming agent, wherein the cementing material comprises 71-81 parts of Portland cement, 9-19 parts of sulphoaluminate cement, 6-8 parts of silica fume and 11-15 parts of fly ash microbeads. The early-strength, high-strength and high-fluidity cement-based grouting material can be obtained under the conventional curing condition by adopting the combined action of the acrylic emulsion polymer, the Portland cement and the sulphoaluminate cement, the plastic expanding agent, the polycarboxylate superplasticizer and the defoaming agent, and has good economic benefits and practical values.

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 the technical field of ink resin preparation, in particular to a preparation method of quick-dry water-based ink resin.The preparation method comprises the steps that a pre-emulsification control module drives all emulsification raw material storage devices according to a preset proportion, pre-emulsification raw materials are injected into an emulsification kettle according to a certain sequence, the pre-emulsification technological process is regulated and controlled in real time, and pre-emulsion is prepared; a polymerization control module is used for adding part of the pre-emulsion and the polymerization initiator solution into a polymerization reaction kettle, when the polymerization reaction reaches a certain degree, the remaining pre-emulsion and the polymerization initiator solution are synchronously added according to a certain proportion, and polymerization is finished after the conversion rate is monitored to reach the standard in real time through near infrared spectroscopy. According to the present invention, through the preset ratio and the real-time regulation, the accurate mixing of the emulsification raw material and the strict control of the reaction condition can be ensured so as to improve the quality of the pre-emulsion and lay the good foundation for the subsequent polymerization reaction.

The invention discloses a preparation method of nitrile rubber with improved thermo-oxidative aging resistance, which comprises the following steps: butadiene and acrylonitrile are used as main polymerization monomers, and a reactive anti-aging agent with an amide group is used as a functional monomer; the total addition amount of butadiene and acrylonitrile is 100 parts by mass, and acrylonitrile is added in batches or continuously, preferably more than three times; a low-temperature emulsion polymerization method is adopted, and the compound emulsifier at least contains disproportionated rosin soap, C10-C13 linear alkyl benzene sulfonic acid and naphthalene sulfonic acid formaldehyde condensate sodium salt; the preparation method comprises the following steps of: adding a molecular weight regulator into a compound emulsifier, preferably 3.2-6.5 parts by weight, more preferably 3.8-6.0 parts by weight of the compound emulsifier, adding the molecular weight regulator once or multiple times, synthesizing butyronitrile rubber cement, adding a terminating agent, degassing, condensing, washing and drying to obtain the butyronitrile rubber. According to the invention, the nitrile rubber with good thermo-oxidative aging resistance is produced, wherein the content of bound acrylonitrile is 17-20%, and the binding amount of Mooney viscosity # imgabs0 # reactive anti-aging agent is 1-2%.

The invention discloses a preparation method of an anti-static ABS (Acrylonitrile Butadiene Styrene) composite material, and belongs to the technical field of ABS composite materials. According to the preparation method of the anti-static ABS composite material, the anti-static performance and the mechanical performance of the composite material are remarkably improved through the synergistic effect of the conductive core-shell particles and the surfactant type anti-static agent. The formula comprises ABS resin, conductive core-shell particles, a surfactant type antistatic agent, an antioxidant BHT (butylated hydroxytoluene), EPDM (Ethylene-Propylene-Diene Monomer), a plasticizer and the like. Conductive core-shell particles are prepared through an emulsion polymerization method, and in-situ polymerization and blending reaction are carried out at high temperature to ensure that the conductive particles are uniformly dispersed in the material to form a stable conductive network. According to the method, melt blending is performed through a double-screw extruder, so that the uniformity and stability of the material are ensured. The finally obtained composite material has excellent antistatic property, mechanical strength and thermal stability, is suitable for the industries of electronics, automobiles and the like, and has a wide application prospect.

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 provides N-O doped flower-like porous carbon microspheres as well as a preparation method and application thereof, and belongs to the technical field of electromagnetic wave absorbing materials. According to the invention, microspheres are coated by using a simple soap-free emulsion polymerization method, a complex multi-layer heterogeneous interface structure is realized, N and O atoms are introduced, and heteroatom doping is realized so as to improve the wave-absorbing performance; a unique flower-shaped structure is grown on the surface of the microsphere through a self-assembly process, and an exquisite flower-shaped porous carbon microsphere can be obtained through carbonization, so that an ingenious structure beneficial to multiple reflection and scattering generation is realized. Under the conditions that the mass ratio of the flower-like porous carbon microspheres to the paraffin is 1: 5 and the matching thickness is 2.5-3mm, the minimum reflection loss of the flower-like porous carbon microspheres is-40.8 to-48.0 dB, the optimal effective absorption bandwidth is 4.40 GHz, and the flower-like porous carbon microspheres have excellent electromagnetic wave absorption performance.

A novel seed coating composition. The coating comprises a wax emulsion, a polymeric binder, a fibrous material, and a filler having a bulk density of 0.05 to 0.80 g / mL. In particular, the coating is selected from polyethylene or Fischer-Tropsch wax emulsions, polyvinyl-based binders, talc and cellulosic fibers. When applied to seed, the seed coating composition provides water permeability, good wear resistance, low dust emissions, short drying time, good flowability and plantability, low caking, good modification and / or coverage, higher ability to add a greater number of desired nutrients and seed and plant protectants, as well as the ability to coat seeds and plants. And / or increasing seed size to improve plantability. The use of the seed coating composition for coating a seed, a method of forming a coated seed using the composition, and the resulting coated seed are also provided.

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 the technical field of microsphere profile control agents, in particular to a high-temperature-resistant polymer microsphere profile control agent and a preparation method thereof. At the temperature higher than 70 DEG C, the structure of a conventional polyacrylamide microsphere is easily degraded, and the water channeling phenomenon cannot be slowed down in the water injection and oil extraction process. In order to solve the technical problems, the invention provides the high-temperature-resistant polymer microsphere profile control agent, the structure of the high-temperature-resistant polymer microsphere profile control agent is a microsphere obtained by reacting acrylamide, allylamine, nitrogen-nitrogen methylene bisacrylamide and activated carbon quantum dots under a reverse emulsion polymerization condition, and the carbon quantum dots are mainly introduced into a polyacrylamide microsphere molecular structure, so that the high-temperature-resistant polymer microsphere profile control agent is prepared. The carbon quantum dots can play a role in supporting a framework in a high-temperature environment, the stability of the polyacrylamide microspheres at the high temperature can be effectively improved, it is ensured that the profile control agent effectively plays a water plugging role in the high-temperature water injection oil extraction process, and the water channeling phenomenon is remarkably reduced.

The present invention therefore relates to aqueous polymer latices of copolymers obtainable by aqueous emulsion polymerisation of ethylenically unsaturated monomers M, which comprise i. 5 to 90% by weight, in particular 10 to 70% by weight, especially 10 to 50% by weight, based on the total amount of monomers M, of a monomer M1, which is 1-hexyl acrylate; ii. 0 to 70% by weight, based on the total amount of monomers M, of at least one monomer M2, which is selected from C2-C5-alkyl esters of acrylic acid, except for tert-butyl acrylate, C7-C20-alkyl esters of acrylic acid and C5-C20-alkyl esters of methacrylic acid and mixtures thereof; iii. 5 to 70% by weight, based on the total amount of monomers M, of at least one monomer M3, which is selected from tert-butyl acrylate, C1-C4-alkyl esters of methacrylic acid, C5-C20-cycloalkyl esters of acrylic acid, C5-C20-cycloalkyl esters of methacrylic acid, C5-C20-cycloalkylmethyl esters of acrylic acid, C5-C20-cycloalkylmethyl esters of methacrylic acid, where cycloalkyl in the aforementioned monomers is mono-, bi- or tricyclic and where 1 or 2 nonadjacent CH2 moieties of cycloalkyl may be replaced by oxygen atoms and where cycloalkyl may be unsubstituted or carry 1, 2, 3 or 4 methyl groups, and monovinyl aromatic monomers, methylene-gamma-butyrolactone and mixtures thereof; where the total amount of monomers M1 and M2 is in the range from 10 to 90% by weight, based on the total amount of ethylenically unsaturated monomers M, and where the total amount of monomers M1, M2 and M3 is at least 90% by weight, based on the total amount of ethylenically unsaturated monomers M. The present invention also relates to a process for producing the aqueous polymer latices of the present invention. The present invention also relates to the use of these polymer latices as binders in waterborne coating compositions and waterborne adhesive compositions, in particular as binders in waterborne coating compositions.

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 provides a hydroxy acrylic emulsion with a core-shell structure, a rheology control agent containing the hydroxy acrylic emulsion as well as a preparation method and application of the hydroxy acrylic emulsion. The hydroxy acrylic emulsion is prepared by carrying out reverse emulsion polymerization on a monomer composition A used for forming an emulsion particle shell layer and a monomer composition B used for forming an emulsion particle core layer under the action of an initiator and an emulsifier. The rheology control agent for the automobile refinishing paint is also prepared by utilizing the prepared hydroxyl acrylic emulsion, and the acrylic emulsion added with the polymerizable emulsifier is matched with the clay stabilizer to generate a synergistic interaction effect, so that more excellent rheology control capability can be provided for the rheology control agent; and the high heat storage stability is provided, and the 1-2-year room temperature stable storage requirement of the automobile refinishing paint is met.

The present invention relates to a biodegradable polymer composition formed by waterborne radical emulsion polymerization of monomers selected from ethylenically unsaturated monomers characterized in that, the polymer composition is composed of at least two different populations of particles, said populations differing in average particle size value by at least a factor of 1.5, wherein (a) a population P1 is constituted by particles having an average particle size of greater than 250 nanometers, said particles being constituted of polymer chains predominantly built of ethylenically unsaturated monomers, further comprising 0.5 to 50% by C weight of oligomer lactide 2-hydroxyethyl, methacrylate terminated macromonomer, based on the total weight of the monomers, and (b) a population P2, distinctive of P1 by average particle size value, is constituted by particles having an average particle size of less than or equal to 250 nanometers, said particles being constituted of polymer chains predominantly built of ethylenically unsaturated monomers, further comprising 0.5 to 50% by weight of oligomer lactide 2-hydroxyethyl, methacrylate terminated macromonomer, based on the total weight of the monomers, wherein said two different populations jointly constitute at least 70% by weight, preferably 90% by weight, of the total polymeric content within said composition.

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 invention relates to the technical field of petroleum additives, in particular to a surfactant as well as a preparation method and application thereof. The structure of the surfactant is # imgabs0 #, and in the formula, T is selected from bicycloalkane or polycycloalkane; r and R0 are the same or different and are independently selected from H or C1-C6 alkyl groups; r1, R2, R3, R4 and R5 are the same or different and are respectively and independently selected from H and substituted or unsubstituted sulfonic acid groups; t is a natural number from 0 to 9; the surfactant takes a bicyclic or polycyclic naphthenic base group as a hydrophobic group, a hydrophobic association polymer can be prepared through a soap-free emulsion polymerization method, the molecular weight is adjustable and controllable, the hydrophobic association effect is outstanding, the post-treatment process is simple, and industrial production is facilitated.

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 provides a polyvinylidene chloride resin emulsion with excellent barrier property as well as a preparation method and application thereof. A barrier property accelerant is added in the preparation method, and the preparation method comprises the following steps: preparing a monomer pre-emulsion: mixing and stirring vinylidene chloride, a comonomer, an emulsifier and water to obtain the monomer pre-emulsion; seed emulsion polymerization: mixing a seed monomer, a seed emulsifier and water, adding an initiator, and reacting to obtain a seed emulsion; polymerizing polyvinylidene chloride emulsion: adding the monomer pre-emulsion into the seed emulsion, and adding an initiator; and after the monomer pre-emulsion is added, adding a barrier property accelerant, mixing and filtering to obtain a target product. The invention also provides a polyvinylidene chloride emulsion and an accelerant. A composite hard sheet prepared by coating a PVC hard sheet with the polyvinylidene chloride water-based emulsion has excellent barrier property and can be used in the fields of medicine, food packaging and the like.

The invention discloses a porous silicon carbon negative electrode material and a preparation method and application thereof, and belongs to the technical field of energy storage materials. Phenolic resin-based porous carbon microspheres are obtained through emulsion polymerization, high-temperature carbonization and gas corrosion, the porous carbon microspheres are used as a matrix, nano silicon particles are deposited in pores of the porous carbon by using a chemical vapor deposition technology, a carbon layer is coated on the outer layer again, and finally the porous silicon-carbon negative electrode material is obtained. According to the porous silicon-carbon negative electrode material, the porous structure of the porous carbon microspheres and the external carbon layer are combined to limit the expansion space of the nano silicon particles and reduce the influence of silicon expansion on the electrode structure, a three-dimensional conductive network constructed by the internal and external carbon materials makes up the defect of poor conductivity of silicon, the rate capability and cycling stability of the battery are improved, and the service life of the battery is prolonged. And the porous silicon carbon negative electrode material is simple in preparation process flow and low in theoretical cost, and has great commercial potential.

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.