400 results about "Methyl acrylate" patented technology

The invention relates to an epoxy core-shell polymer particle and resin, a preparation method of the epoxy core-shell polymer particle and resin and application of the epoxy core-shell polymer particle and resin to epoxy resin. The preparation method of the epoxy core-shell polymer particle comprises the following steps: heating and mixing a polybutadiene seed emulsion, a reducing agent, an emulsifier and the like; adding methyl methacrylate and an initiator, and glycidyl methacrylate and an initiator, and heating to react; compared with the prior art, the core-shell particle with the outer layer of the synthesized shell containing the epoxy group can be used for toughening the epoxy resin, so that the toughness of the epoxy resin is effectively improved while the excellent heat resistance and mechanical properties of the epoxy resin are maintained.

The invention discloses a biodegradable polylactic acid composite material and a preparation method thereof, and relates to the technical field of polylactic acid materials. The method comprises the steps that firstly, chitosan activated through hydrochloric acid is subjected to graft modification through a KH550 silane coupling agent, meanwhile, nano-zinc oxide is subjected to surface modification through stearic acid, the chitosan and the nano-zinc oxide are mixed, spray drying is conducted, and antibacterial composite powder is prepared; the preparation method comprises the following steps: performing hydrochloric acid activation and KH570 silane coupling agent modification on nano silicon dioxide, performing hydroxypropylation modification on alkali lignin, and performing reflux crosslinking reaction on the modified alkali lignin, KH570 modified nano silicon dioxide, polycaprolactone, methyl methacrylate and azodiisobutyronitrile to prepare a heat-resistant reinforcer; uniformly mixing polylactic acid, poly (butylene succinate), the antibacterial composite powder, the heat-resistant reinforcer, tributyl citrate, polyethylene glycol and talcum powder, and extruding and granulating by using a twin-screw extruder to obtain the heat-resistant antibacterial material. The composite material prepared by the invention has excellent antibacterial property, heat resistance and biodegradability.

The invention relates to the technical field of oilfield chemistry, in particular to an aminoethanesulfonic acid type surfactant and a preparation method and application thereof.The preparation method of the aminoethanesulfonic acid type surfactant comprises the steps that firstly, fatty amine is dissolved in a first solvent, a sodium chloroethanesulfonate aqueous solution is added, and N-long-chain alkyl-2-sodium aminoethanesulfonate is obtained through a reaction; and 2, dissolving a required amount of N-long-chain alkyl-2-sodium aminoethanesulfonate in a second solvent, adding a required amount of methyl acrylate, and reacting to obtain the aminoethanesulfonic acid type surfactant. The aminoethanesulfonic acid type surfactant disclosed by the invention contains long-chain alkyl, amino, ester groups and sulfonic acid groups, so that the aminoethanesulfonic acid type surfactant has good surface activity and can meet the development requirements of oil and gas fields. The microemulsion cleanup additive prepared from the aminoethanesulfonic acid type surfactant can effectively reduce the surface tension and the interfacial tension of an aqueous solution, and the preparation method is easy and convenient to operate, mild in condition and suitable for industrial production.

An extreme-cold resistant low-fume halogen-free flame-retardant polyolefin sheath, a preparation method therefor, and a cable. The sheath comprises the following raw materials in parts by mass: 4-16 parts of an ethylene-vinyl acetate copolymer, 7-13 parts of a phosphate group functionalized linear low-density polyethylene, 9-15 parts of an ethylene-octene copolymer, 5-10 parts of a maleic anhydride-grafted ethylene-methyl methacrylate copolymer, 10-15 parts of magnesium hydroxide, 40-50 parts of aluminum hydroxide, etc. The preparation method for the phosphate group functionalized linear low-density polyethylene comprises: adding a catalyst to a pre-cooled ethylene monomer, adding a vinyl phosphate ester and an initiator after the reaction, and reacting for 1-2 hours at a temperature of 65-75°C and a pressure of 15-35 Mpa and then terminating the reaction, thereby obtaining the phosphate group functionalized linear low-density polyethylene. Compared with unfunctionalized polyethylene, the phosphate group functionalized polyethylene used has greatly improved low-temperature and flame-retardant performance, and can improve the overall flame-retardant and low-temperature performance of the formula.

The invention discloses a super-tough temperature-resistant self-repairing copolymer based on SBS acrylate dynamic synergistic reinforcement and a preparation method thereof, and belongs to the technical field of self-repairing materials in compositions of high-molecular compounds. The copolymer comprises SBS, an acrylate monomer, a dynamic bond functional monomer, an initiator, a cross-linking agent, a nano reinforcing agent and a temperature-resistant modifier, wherein the dynamic bond functional monomer comprises at least one of acryloyloxyethyl disulfide, acrylamide acryloyloxyethyl disulfide or anthracene methyl acrylate. The molecular structure of the dynamic bond functional monomer contains a carbon-carbon double bond and a disulfide bond, in the free radical polymerization reaction initiated by the initiator, the carbon-carbon double bond is opened and is subjected to a copolymerization reaction with an SBS chain segment or an acrylate chain segment, so that the disulfide bond enters the polymer chain segment, the dynamic disulfide bond can be reversibly broken and recombined at high temperature, and the dynamic bond functional monomer is obtained. The high-temperature viscoelasticity is maintained, the material is endowed with self-repairing capability, and the problem that the viscoelasticity of the material in the prior art is sharply reduced at high temperature (gt; 120 DEG C) is solved.

The application provides a hindered amine light stabilizer and a preparation method thereof, and the preparation method comprises the following steps: putting N, N-bis(2, 2, 6, 6-tetramethyl-4-piperidyl) 1, 6-hexanediamine and an organic solvent into a reaction bottle, heating to 50-80 DEG C, adding methyl acrylate into the system dropwise, obtaining an intermediate I through an addition reaction, and then obtaining a crude product through an ester exchange reaction of the intermediate I and tetramethylpiperidinol in the presence of a catalyst and an organic solvent, washing with water, decoloring, filtering, cooling and crystallizing, filtering and drying to obtain the product; the light stabilizer obtained by the application has multiple hindered amine functional groups, has good heat resistance and extraction resistance, and has good compatibility with resin.

The invention relates to the technical field of MBS resin preparation, in particular to MBS resin with improved low-temperature tensile strength and a preparation method thereof. The MBS resin for improving the low-temperature tensile strength is prepared from the following main raw materials: butadiene, styrene, methyl methacrylate, butyl acrylate, N-phenylmaleimide, BAPT, a silane coupling agent and an auxiliary reinforcing monomer, the composition also comprises the following auxiliary agents: an emulsifier, an initiator, a molecular weight regulator and an antioxidant. Through gradient introduction and step-by-step reaction of a rigid monomer N-PMI, a flexible monomer THFA and a cross-linking agent BAPT, a fine structure of'in-core rigidity increasing, shell layer rigidity and softness and interface strengthening 'is realized in polymer particles. By means of the collaborative structure from inside to outside, optimal distribution of rigidity and toughness of the material on the molecular level is achieved in advance, and the root reason for breaking through the low-temperature performance balance bottleneck macroscopically is achieved.

The application discloses a quinoline small molecule blended modified polymer dielectric material and a preparation method and application thereof, and belongs to the technical field of capacitor films. The preparation raw materials comprise quinoline derivatives, polymethyl methacrylate, styrene-methyl methacrylate copolymer, polyetherimide, polypropylene and N-methyl pyrrolidone solution, and the preparation steps comprise blending and film preparation. The blending solution or eutectic mixture is prepared through blending, and the polymer dielectric film is prepared through a flow casting method or bidirectional stretching. The prepared quinoline small molecule blended modified polymer dielectric film has excellent electrical properties, can reduce the leakage current of the polymer material, has high DC breakdown field strength, high energy storage density and low energy loss, and is easy to realize large-scale production.

The application relates to a method for continuously preparing imidacloprid intermediate 3-methyl-2-(4-morpholinyl)cyclobutyl acid methyl ester, and the specific steps are as follows: raw material morpholinyl propylene and methyl acrylate are respectively introduced into a preheater, then the preheated raw materials are pumped into a micro-channel reactor for reaction, after the reaction is completed, the materials are discharged from the micro-channel reactor outlet into a reaction kettle, reaction is carried out, then the cyclization liquid obtained in the reaction kettle is subjected to light removal in a light removal tower, 3-methyl-2-(4-morpholinyl)cyclobutyl acid methyl ester after light removal is collected from the tower kettle of the light removal tower, the 3-methyl-2-(4-morpholinyl)cyclobutyl acid methyl ester is introduced into a pentyl ester synthesis process, and the recovered methyl acrylate collected from the top of the light removal tower is reused in the reaction kettle to participate in the ripening reaction. The application has the advantages of high product purity, low raw material unit consumption, good safety, low labor cost and the like.

The application relates to the field of decorative materials, in particular to a wear-resistant decorative paper and a preparation method thereof. The preparation method of the wear-resistant decorative paper comprises the following steps: coating wear-resistant paint on the surface of base paper to form a wear-resistant coating layer through drying treatment, so that the wear-resistant decorative paper is prepared; the wear-resistant paint is prepared by using acrylic acid hydroxy ester, ethyl acrylate and methyl methacrylate, so that the wear-resistant paint has good adhesion; the wear-resistant paint is prepared by using divinylbenzene and styrene, so that the hardness and strength of the film layer formed by the wear-resistant paint are improved; the wear-resistant paint is prepared by using vinyl silicone oil, so that the flexibility and water / oil repellency of the film layer formed by the wear-resistant paint are improved; the wear-resistant paint is prepared by using acrylic acid hydroxy ester, ethyl acrylate, methyl methacrylate, divinylbenzene, styrene and vinyl silicone oil, so that the prepared wear-resistant decorative paper has excellent wear resistance.

The invention relates to the technical field of concrete, and particularly discloses an antioxidant counterweight cementing material, steel box girder counterweight concrete and a preparation method of the steel box girder counterweight concrete. The antioxidant counterweight cementing material provided by the invention is prepared from the following components in parts by weight: 50 to 70 parts of cement, 20 to 30 parts of fly ash, 10 to 15 parts of slag powder, 5 to 10 parts of silica fume, 3 to 5 parts of a maleic anhydride-acrylamide-methyl acrylate terpolymer and 1 to 2 parts of an antioxidant, in the maleic anhydride-acrylamide-methyl acrylate terpolymer, the molar ratio of maleic anhydride to acrylamide to methyl acrylate is 1: (0.25 to 0.45): (0.33 to 0.52); the invention further provides steel box girder counterweight concrete containing the antioxidant counterweight cementing material and a preparation method of the steel box girder counterweight concrete. The anti-oxidation counterweight cementing material provided by the invention can greatly inhibit the oxidation reaction of concrete and delay the aging speed of the concrete.

The application belongs to the technical field of batteries, and discloses a low-temperature phase change electrolyte, a preparation method thereof and a secondary battery. The low-temperature phase change electrolyte is an organic solvent system. A polymer containing a five-membered ring or a six-membered ring and an imidazole ionic liquid containing a five-membered heterocyclic cation have a pi-pi interaction. When the temperature is higher than the LCST temperature, the pi-pi interaction between the polymer and the imidazole ionic liquid is broken, and phase change occurs. Meanwhile, the benzene ring and the thiophene of the polymer both contain electron-withdrawing groups or C1-C3 alkyl groups, and the ethoxy / ether group segment based on the methyl acrylate structure can effectively reduce the phase change temperature of the polymer, and further reduce the phase change temperature of the electrolyte. The phase change electrolyte can change at a low temperature of 35-60 DEG C. When the battery temperature rises to 75 DEG C or above, the internal reaction of the battery completely stops, and the whole process of temperature rise prevents the battery from having thermal runaway.

The application belongs to the technical field of biomedical materials, and discloses a collagen-based double-network porous hydrogel scaffold capable of recruiting endogenous stem cells and a construction method and application thereof. The scaffold takes collagen II (Col-II) and oxidized methyl acrylated hyaluronic acid (AHAMA) as an organic phase, and is constructed into a physical / chemical double-network structure through Schiff base dynamic crosslinking and ultraviolet light-induced methacryl radical polymerization. An air-in-water emulsion template method is used to form a through-porous structure, and 5' aldehyde-modified nucleic acid aptamer Apt19S is anchored in the scaffold network to achieve specific recruitment of endogenous pluripotent stem cells. The scaffold has excellent mechanical properties, a biomimetic extracellular matrix microenvironment and a targeted stem cell recruitment function, can effectively promote the directional differentiation of stem cells into chondrocytes, avoids the immune rejection and ethical issues caused by exogenous stem cell transplantation, and is suitable for the field of articular cartilage defect repair.

The present invention relates to a novel synthesis of 2-fluoromethyl acrylate (MFA), which is a key precursor for the production of Veltassa® (Patiromer). The process according to the invention obtains MFA (III) by reacting an alpha-substituted beta-hydroxy propionic acid derivative (I) via one or more intermediate steps involving one or more alpha-, beta-substituted propionic acid derivatives (II).

The invention relates to the technical field of polymer waste recycling, and discloses a device and method for preparing methyl methacrylate through continuous regeneration of waste acrylic, and the device comprises a two-stage reaction and feeding system, a molten salt online regeneration and energy management system, and a gas-phase product active purification and collection system. The method comprises the following steps: in the first-stage flash evaporation depolymerization cavity, the waste acrylic is in direct contact with high-temperature molten salt to realize rapid flash evaporation depolymerization; finishing the finishing reaction in a secondary molten salt cracking reactor and stripping the product through inert gas; the gas product is subjected to quenching separation and collection after being purified by high-temperature plasma; and the reacted molten salt is subjected to filtering purification, thermoelectric conversion energy recovery and reheating, and then is circulated back to the first-stage reaction cavity. According to the invention, the problems of low heat transfer efficiency, more side reactions, and difficulty in continuous and stable production due to easy inactivation of the medium in the traditional thermal cracking process are solved, the efficient and continuous production process is realized, and the yield and the product quality of methyl methacrylate are improved.

The invention relates to the field of polyacrylate photoresists, in particular to a photoresist film-forming resin raw material and a preparation method thereof.The preparation method comprises the steps that cyclopentadiene is dropwise added into a mixed solution of alpha-bromomethyl acrylate and a solvent, the temperature is controlled, a reaction is conducted for 4 h, and 5-bromodicyclohept-2-ene-5-carboxylic acid methyl ester is prepared; the preparation method comprises the following steps: adding alkali into 5-bromo dicycloheptyl-2-ene-5-carboxylic acid methyl ester, and hydrolyzing at 20-30 DEG C for 2 hours to obtain a hydrolysis product; the hydrolysis product is subjected to epoxidation and hydrolysis with hydrogen peroxide under the condition of glacial acetic acid, and 1-bromine-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone is obtained; according to the method, 1-bromo-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone is cyanided by cuprous cyanide to prepare the 1-cyano-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone monomer, and the method has the advantages that the raw materials are convenient and easy to obtain, the route is short, the reaction conditions are relatively mild, the operation safety is relatively high, the total yield is remarkably improved, and the like.

The application discloses an anti-fouling cross-linking polymer fracturing fluid and a preparation method thereof, and relates to the technical field of fracturing fluids. In the preparation of the anti-fouling cross-linking polymer fracturing fluid, ethylenediamine is sequentially reacted with methyl acrylate, mercaptoethylamine and vinyl phosphoric acid to obtain an over-branched scale inhibitor; polyvinyl alcohol is reacted with (4-formylphenyl) prop-2-enate to obtain modified polyvinyl alcohol; 1-alkenylimidazole is reacted with bromododecane to obtain an alkenylimidazole salt monomer; acrylamide, acrylic acid, the alkenylimidazole salt monomer and 3-butene-1-amine are polymerized to obtain functionalized polyacrylamide; and the functionalized polyacrylamide, the functionalized polyvinyl alcohol, the over-branched scale inhibitor and deionized water are uniformly mixed to obtain the anti-fouling cross-linking polymer fracturing fluid. The anti-fouling cross-linking polymer fracturing fluid prepared by the application has the advantages of excellent anti-fouling performance, good temperature resistance and self-cross-linking.

The application discloses a sodium superionic conductor catalyst containing a metal oxide coating and a preparation method and application thereof, and the catalyst comprises a Ti, Zr and Ce metal oxide coating component and element components Ti, P, S, O and H constituting a main structure of the sodium superionic conductor, and the mass percentage components are as follows: MeO2: 2.5-20%; H 1‑x Ti2(PO4) 3‑x (SO4) x : 80-97.5%, wherein the metal Me in the coating component is one of Ti, Zr and Ce or any two combinations, and x=0.4-1. The application first uses a metal oxide coating and a sodium superionic conductor to prepare a catalyst, the external coating structure can play a self dehydrogenation role, and the coating effect can promote a subsequent reaction; a synthesis catalyst method is simple, synthesis cost is low, and batch production is easy; the catalyst is used for directly synthesizing propylene acid and methyl propylene acid from methanol and acetic acid, product selectivity is high, separation is easy, and the industrial application prospect is wide.

The invention provides a preparation method of methacrylic acid 2-butoxyethyl ester, and belongs to the technical field of organic synthesis. According to the invention, p-hydroxyanisole (MEHQ) and 2, 2, 6, 6-tetramethylpiperidine oxide (TEMPO) are used as polymerization inhibitors at the same time, and the dual polymerization inhibitors are synergistically used, so that the auto-polymerization of methyl methacrylate (MMA) and 2-butoxyethyl methacrylate is reduced, and the conversion rate is increased.

The application belongs to the technical field of shock absorber oil, and particularly relates to a silicon-based shock absorber oil for racing cars and a preparation method thereof. The silicon-based shock absorber oil for racing cars comprises, by mass percentage, 50-60 parts of silicone oil, 40-50 parts of base oil, 3-6 parts of a viscosity index improver, 0.2-0.5 parts of an extreme pressure anti-wear agent, 0.2-0.5 parts of a pour point depressant, and 0.2-0.5 parts of an antioxidant. The extreme pressure anti-wear agent comprises thiazolyl disulfide dimers and poly-methyl acrylate modified nanoscale spherical boron nitride. The silicon-based shock absorber oil for racing cars has excellent viscosity-temperature performance, shear stability, heat resistance, wear resistance, corrosion resistance and high-temperature foam resistance.

The invention discloses a high-conductivity high-adhesion automobile bumper primer and a preparation method thereof, and belongs to the technical field of automobile bumper primers. The high-conductivity and high-adhesion automobile bumper primer is prepared from the following raw material components: polar modified chlorinated polypropylene, waterborne acrylic resin, a dispersing agent, a flatting agent, a defoaming agent, titanium dioxide, superfine precipitated barium sulfate, fumed silica, conductive filler and deionized water. The polar modified chlorinated polypropylene is obtained by carrying out free radical polymerization on a polar unsaturated monomer and chlorinated polypropylene; the polar unsaturated monomer is prepared from acrylic acid, methyl methacrylate, hydroxyethyl acrylate and 3-allyl-2-hydroxybenzaldehyde; the water-based acrylic resin is obtained by carrying out copolymerization on hydroxyethyl methylacrylate, hydroxyethyl acrylate, methacrylamide and 2, 5-divinyl benzene-1, 4-diamine; the conductive filler adopts carbon nanotubes, graphene and conductive carbon black; the high-conductivity and high-adhesion automobile bumper primer prepared by the preparation method disclosed by the invention is excellent in mechanical property and relatively good in conductivity.

The invention belongs to the technical field of medical wound nursing materials, and discloses a conductive nanofiber aerogel for wound repair and seepage monitoring, a raw material and a preparation method, the conductive nanofiber aerogel comprises a matrix and a conductive material dispersed in the matrix; the preparation method comprises the following steps: mixing and stirring deionized water, methacrylated sodium alginate and EDOT to obtain an emulsion, controlling the EDOT in the emulsion to be oxidized into PEDOT, and removing unreacted EDOT and deionized water to obtain the conductive material. Performing liquid nitrogen freezing and freeze drying on the aqueous dispersion in which the nanofiber (containing the first methylacryloyl polymer) and the conductive material are dispersed and the second methylacryloyl polymer is dissolved at the same time to obtain an intermediate product, and initiating double bonds in methylacryloyl groups contained in the intermediate product to perform cross-linking reaction, so as to obtain the conductive nanofiber. The conductive nanofiber aerogel is obtained. The product provided by the invention has good wound repairing and seepage monitoring performance, and can play a high-efficiency role in the field of high-seepage wound application.

The invention relates to the technical field of powder coatings, and particularly discloses a powder coating for a photovoltaic panel frame as well as a preparation method and application of the powder coating. The powder coating provided by the invention is prepared from the following components in parts by weight: 50 to 80 parts of weather-resistant powder resin, 1 to 10 parts of curing agent, 0.1 to 5 parts of catalytic promoter, 5 to 20 parts of filler, 1 to 2 parts of flatting agent and 0.5 to 25 parts of pigment, the weather-proof powder resin is a mixture of saturated polyester resin containing a terminal hydroxyl group, a methyl methacrylate-butyl acrylate copolymer and hydroxyl type polyurethane resin in a weight ratio of 1: (0.26-0.43): (0.43-0.87). The powder coating provided by the invention has the advantages of low curing temperature, good film-forming hardness and adhesive force and the like, and can meet the requirements of the composite material photovoltaic panel frame on the coating.

The application provides an external curing agent with passive anti-icing performance and a preparation method and application thereof, and belongs to the technical field of building materials.The external curing agent comprises a functional component and a basic component in a mass ratio of (80-83):129.2, wherein the functional component comprises methyl acryloyloxy functionalized Co3O4, modified polydimethylsiloxane, perfluorooctyl methacrylate, methyl methacrylate and isooctyl acrylate, and the basic component comprises water, an emulsifier, a pH buffer, N-hydroxymethyl acrylamide, butyl acrylate and an initiator.The application realizes the synergistic effect of anti-icing, water retention and strength enhancement through nano-functionalization and fluorosilicon hydrophobic modification in combination with precise proportioning of soft and hard monomers, and the prepared curing agent is suitable for concrete curing in a cold environment (0 DEG C to -15 DEG C), can maintain film stability under low-temperature conditions, prevents surface icing while blocking water evaporation, and solves the problem of early concrete frost damage.

The invention relates to the technical field of oilfield chemistry, in particular to a sulfamic acid type surfactant as well as a preparation method and application thereof.The sulfamic acid type surfactant is prepared according to the following steps: step one, after fatty amine and a first solvent are mixed, adding a 3-chloro-2-hydroxypropyl sodium sulfonate aqueous solution, and stirring to obtain a first mixture; reacting to obtain 3-(long-chain alkylamino)-2-hydroxypropane-1-sodium sulfonate; and 2, dissolving a required amount of 3-(long-chain alkylamino)-2-hydroxypropane-1-sodium sulfonate in a second solvent, adding a required amount of methyl acrylate, and reacting to obtain the sulfamic acid type surfactant. The sulfamic acid type surfactant disclosed by the invention contains long-chain alkyl, amino, ester group, hydroxyl and sulfonic acid group, so that the sulfamic acid type surfactant has good surface activity and meets the development requirements of oil and gas fields, and the microemulsion cleanup additive prepared by utilizing the sulfamic acid type surfactant has excellent water solubility and surface activity and meets the industrial use standards of non-fluorocarbon cleanup additives.

The application discloses a preparation method of a rare earth coordination type force-induced multi-fluorescent color variable gel, and comprises the following steps: dissolving a Schiff base ligand molecule, a monomer, an initiator and a crosslinking agent in deionized water, and stirring uniformly to obtain a stable solution, wherein the monomer is at least one of acrylamide, ethyl acrylate, methyl acrylate and methacrylic acid; adding a rare earth compound into the stable solution to obtain a prepolymer solution, and obtaining the rare earth coordination type force-induced multi-fluorescent color variable gel through free radical polymerization; the method has mild conditions, simple steps and is easy to realize. The application further discloses the force-induced multi-fluorescent color variable gel prepared through the preparation method; the types of the rare earth ions and the Schiff base ligand molecules are adjusted to obtain a multi-color fluorescent gel, and the visual fluorescent color change is realized under the action of external force. The force-induced multi-fluorescent color variable gel is combined with other functional materials to realize the integration of multiple functions, and can be applied to multiple fields such as optical devices and mechanical sensors.

The application discloses a methyl methacrylate copolymer and a preparation method and application thereof. The methyl methacrylate copolymer is mainly obtained by polymerization of 20-90 mass parts of methyl methacrylate monomer a), 10-80 mass parts of aromatic unsaturated hydrocarbon monomer b) and 0-20 mass parts of other vinyl monomer c). By adding phosphite antioxidant before resin devolatilization and adding hindered phenolic antioxidant in the resin extrusion granulation stage, the resin has good optical performance and aging resistance.

The invention provides a rubber / EVA dual-purpose treating agent and a preparation method and application thereof.The rubber / EVA dual-purpose treating agent is prepared from an ethylene chloride-vinyl acetate copolymer, a styrene-butadiene-styrene block copolymer, methyl methacrylate, benzoyl peroxide, 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, a styrene-butadiene-styrene block copolymer, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and a styrene-butadiene-styrene block copolymer. The adhesive is prepared from 2, 6-di-tert-butyl-4-methylphenol, chloroprene rubber, butadiene styrene rubber, 2-hydroxyethyl methacrylate, an auxiliary agent, a diluent and a solvent. The rubber / EVA dual-purpose treating agent can be universally used for two materials, namely rubber and EVA, so that inferior-quality products and mixed use conditions in the production process are reduced, waste is not easily caused, and the rubber / EVA dual-purpose treating agent is convenient to use; components with strong pungent smell, such as trichloroisocyanuric acid, do not need to be added, so that the prepared treating agent is relatively small in smell and beneficial to environmental protection.

A composite material comprising an adhesive film comprising a polar polymer bonding layer of ethylene methyl acrylate and ketene vinyl acrylate, and a bonding resin of polyethylene, polypropylene, ethyl vinyl acetate, acrylate, or combinations thereof; a metal substrate adhered to the bonding resin; and a polymer layer adhered to the polar polymer bonding layer, the polymer layer comprising polyvinyl chloride.

Methods and fracturing fluids for fracturing subterranean formations using in situ proppant particles. The method includes injecting a fracturing fluid into a subterranean formation at a gradient equal to or higher than a fracture. The fracturing fluid comprises a non-phase-change fluid, and the non-phase-change fluid at least comprises an aqueous fluid and a surfactant; and a phase change fluid comprising a phase change material selected from the group consisting of a styrene monomer, a methyl methacrylate monomer, or a combination of a styrene monomer and a methyl methacrylate monomer, an initiator, and optionally an accelerator.