41 results about "Sodium methacrylate" patented technology

The invention discloses a bismuth oxymethacrylic acid hybrid nanocluster with a bamboo joint-like structure as well as a preparation method and application of the bismuth oxymethacrylic acid hybrid nanocluster. The preparation method comprises the following steps: S1, dissolving a bismuth-containing compound in an organic solvent at a certain temperature to form a bismuth-containing organic solution; s2, adding sodium methacrylate into the bismuth-containing organic solution, and reacting for a period of time at a certain temperature; and collecting a reaction product to obtain the bismuth oxide organic hybrid nanocluster with the bamboo-joint-like structure. According to the preparation method provided by the invention, the problems that an inorganic-organic hybrid material is difficult to prepare and an assembly structure is difficult to control at present are solved, and the construction of the methacrylic acid monomer compounded bismuth oxide cluster is realized by a one-step method. According to the invention, the bismuth oxymethacrylic acid hybrid nanocluster with a bamboo-like structure is reported for the first time, the regulation and control mode of the nanostructure is researched in mechanism, meanwhile, a potential nano preparation is provided for treatment of bladder cancer, and the bismuth oxymethacrylic acid hybrid nanocluster has extremely high nano material construction and clinical diagnosis and treatment benefits.

The invention belongs to the technical field of flocculants, and particularly provides a wastewater treatment flocculant and a preparation method thereof.The preparation method of the wastewater treatment flocculant comprises the following steps that 1, guar gum and isopropyl acrylamide react to prepare a precursor A; guar gum reacts with sodium methacrylate to prepare a precursor material B; and 2) uniformly mixing deionized water, the precursor material A, the precursor material B and a glucan derivative polymer, then adding a monomer and an initiator, and carrying out a photo-initiation reaction, purification and drying to obtain the flocculant. The prepared flocculant has the advantages of good flocculation effect and applicability to a complex sewage system.

The invention belongs to the technical field of adsorption, and relates to a hydrogel adsorption material based on microbial activated coal gangue loaded with rare earth elements as well as a preparation method and application of the hydrogel adsorption material. The method comprises the following steps: grinding and calcining a coal gangue raw material to obtain calcined coal gangue; mixing the calcined coal gangue with a mixed microbial agent, adjusting the pH value, standing and culturing to obtain microbial activated coal gangue; immersing the microbial activated coal gangue into a rare earth element salt solution, and magnetically stirring to obtain rare earth element loaded modified coal gangue; dissolving sodium methacrylate sulfonate and 2-acrylamido-2-methylpropanesulfonic acid in deionized water, adding a cross-linking agent, an initiator, a rare earth element salt solution and the modified coal gangue, fully reacting until the system is viscous, and freeze-drying to obtain the microbial activated coal gangue loaded rare earth element hydrogel adsorption material. The problems that the potential activity of the coal gangue is not fully utilized, and a traditional hydrogel adsorption material is poor in selectivity, high in cost and the like are solved.

The invention discloses an additive for adjusting the setting time of a high-calcium-based material of an alkali-activated circulating fluidized bed, and belongs to the technical field of solid waste recycling and building materials. The additive is prepared from the following raw materials in parts by mass: 300 to 400 parts of allyl polyoxyethylene ether, 50 to 250 parts of acrylic acid, 4 to 20 parts of sodium methacrylate sulfonate, 10 to 30 parts of chain initiator, 2 to 8 parts of chain transfer agent and 600 to 800 parts of water. By scientifically regulating and controlling the raw material composition of the additive for regulating the coagulation time of the alkali-activated circulating fluidized bed high-calcium-based material, the coagulation time of the circulating fluidized bed high-calcium-based material is effectively regulated, and a technical guarantee is provided for industrial application of circulating fluidized bed high-calcium ash.

The application discloses a surface double-network composite hydrogel with a three-layer structure similar to a flat worm, which comprises a graphene-containing polyacrylamide hydrogel matrix layer, and a poly-N-isopropyl acrylamide gel network thin layer formed on one side of the graphene-containing polyacrylamide hydrogel matrix layer and a poly-sodium methacrylate gel network thin layer formed on the other side of the graphene-containing polyacrylamide hydrogel matrix layer. The application forms a gel double-network structure with photothermal response and pH response on the surface of the two sides of the matrix gel, which is similar to the body structure of a flat worm in nature, in which the back skin and the belly skin sandwich the body. The application can present different initial shapes by adjusting the pH, so as to endow the application with various photothermal response complex driving modes under different initial shapes, and finally realizes the repeatable programming of the photothermal response complex deformation.

The invention relates to the technical field of high polymer materials, and discloses a preparation method of sodium acrylate and derivatives thereof and PEGDA (polyethylene glycol diacrylate) copolymerized hydrogel, which comprises the following steps: S1, carrying out deep deoxidization pretreatment on raw materials containing sodium methacrylate monomers, a polyethylene glycol diacrylate cross-linking agent and water, and preparing under the protection of inert gas to obtain a prepolymerized solution; s2, carrying out polymerization reaction by adopting a programmed thermal management process to obtain a gel prepolymer; s3, carrying out hot press molding treatment on the gel prepolymer to obtain cured hydrogel; and S4, carrying out multi-stage deep purification treatment on the cured hydrogel. According to the method disclosed by the invention, the three technical problems of oxygen inhibition, thermal runaway and toxic residue of products in free radical polymerization are effectively solved by systematically controlling a reaction source, a process and a product. The prepared hydrogel is high in batch-to-batch reproducibility, uniform in network structure and suitable for industrial large-scale production, and the biocompatibility reaches the medical implantation level standard.

This invention relates to the field of micro / nano manufacturing technology, and in particular to a high-refractive-index fluidized nanoparticle, a hybrid photoresist, a patterned coating, and methods for preparing the respective. The high-refractive-index fluidized nanoparticle comprises a core, the core being modified with a first ligand and a second ligand; the first ligand is one or more selected from methacrylic acid, 4-pentenoic acid, methacryloxypropyltrimethoxysilane, and sodium methacrylate sulfonate; the second ligand is one or more selected from piperidine, N,N-diisopropylethylamine, 1,5,7-triazabicyclo[4.4.0]decene-5-ene, tetramethylguanidine, triethylamine, and tetrahydropyrrole. This invention, through the design of ultra-small metal oxide nanoparticles and innovative organic ligands, successfully solves the technical contradiction of traditional photoresist materials in achieving high resolution, high refractive index, and low curing shrinkage.

The invention discloses a method for preparing γ-methacryloxypropyl alkoxysilane, and relates to the technical field of preparing γ-methacryloxypropyl alkoxysilane. The invention utilizes potassium methacrylate or sodium methacrylate to react with chloroalkane silane, and the raw materials are easily available; the reaction process is solvent-free, and solvent recovery is not required, thereby avoiding contact with personnel and causing personal injury, and the process route is shortened and the operation is simpler; the water washing process is used, and the product recovery is more thorough, and the yield is relatively high, with an input of 2400kg per batch and an output of 2750-2780kg per batch, and an average of about 80kg more products are produced per batch than the original process; an efficient organic amine catalyst is used, and the reaction time is short and the crude product content is high.

The present application belongs to the technical field of lithium battery, and particularly relates to a water-based HTPB binder for lithium battery positive electrode and a preparation method thereof. The present application provides a high-molecular polymer composite water-based binder with a core-shell structure based on HTPB water-based technology, which is mainly prepared by acrylation of HTPB with isocyanate propyl, and then emulsion polymerization with sodium methacrylate solution, acrylonitrile, acrylamide and acrylate monomer. The product has no VOC residue, and is an environmentally friendly, non-toxic and pure green water-based binder. Compared with the existing water-based positive electrode binder, the water-based HTPB binder provided by the present application has a toughness increased by more than 2 times, and the peeling force is also increased by more than 1 time. The battery prepared by the water-based HTPB binder provided by the present application has a capacity retention rate of more than 80% after 6000 cycles.

The invention relates to the technical field of silver powder preparation, and particularly discloses micron-sized silver powder and a preparation method and application thereof. The preparation method comprises the following steps: dissolving 40-60 parts of silver nitrate in 180-220 parts of water, adding 40-60 parts of 25% (w / w) ammonia water to prepare a reaction solution, then dissolving 3-4 parts of glucose, 3-5 parts of hydroxylamine hydrochloride and 7-8 parts of triethanolamine in 180-220 parts of water, and adding 5-10 parts of sodium hydroxide to adjust the pH value to prepare a reduction solution; mixing the reducing solution and the reaction solution, and carrying out reduction reaction; and then sodium polymethacrylate and N, N-dimethyl stearamide are continuously added, and finally the micron-sized silver powder is obtained after filtering, cleaning and drying are conducted. The inner electrode conductive silver paste prepared from the micron-sized silver powder has good printing characteristics in the printing process, and meanwhile has good cofiring matching performance with a dielectric layer in the firing process.

The invention discloses a composite hydrogel adsorbent as well as a preparation method and application thereof, and relates to the technical field of water pollution treatment. The composite hydrogel adsorbent comprises the following raw materials: chitosan, acrylic acid, sodium methallyl sulfonate and coffee grounds. Wherein the molar weight of the sodium methallyl sulfonate is 2.3-2.9% of the molar weight of the acrylic acid; the mass of the chitosan is 0.09-6.3% of the total mass of the sodium methallyl sulfonate and the acrylic acid; the mass of the coffee grounds is 0.4-1.8% of the total mass of the sodium methallyl sulfonate and the acrylic acid, and the composite hydrogel adsorbent is prepared through a free radical polymerization reaction. The composite hydrogel adsorbent disclosed by the invention is high in adsorption capacity and high in speed on dyes, especially methylene blue and crystal violet, in sewage, the sewage treatment efficiency is remarkably improved, an efficient, economical and environment-friendly solution is provided for dye wastewater treatment, and the composite hydrogel adsorbent has a good practical application prospect.

The present application belongs to the field of synthetic leather and its manufacturing, and more specifically, to a synthetic leather surface coating material and a construction process for reverse coating treatment thereof. A synthetic leather surface coating material comprises the following components in parts by weight: 70-90 parts of a polyurethane composition, 8-10 parts of modified bamboo charcoal fibers, 1-4 parts of a curing agent, 0.5-1.5 parts of a defoaming agent, and 3-7 parts of an auxiliary agent, wherein the auxiliary agent comprises sodium methacrylate, sodium hydroxymethylcellulose, and dodecafluoroheptyl methacrylate. A synthetic leather surface coating material of the present application and a construction process for reverse coating treatment thereof improve the problem that the existing material loading is prone to poor leveling of the processing material on the surface, making it impossible to apply it evenly, causing the coating quality of the surface to decline rapidly, and the chemical resistance and wear resistance, etc. cannot meet the coating performance requirements of the surface of the automotive interior skin, so that the obtained synthetic leather surface coating material has good leveling and mechanical properties and ensures that only one loading is required, and the mechanical properties and wear resistance and comfortable and smooth appearance meet the automotive interior requirements.

This invention discloses a polymeric sealing material for PU valves and its preparation method, belonging to the field of synthetic polymeric sealing materials. The polymeric sealing material for PU valves of this invention, by mass parts, comprises the following raw material components: 100 parts of rubber compound, 2.5-3.5 parts of vulcanizing agent, 1-2 parts of crosslinking agent, 5-20 parts of plasticizer, 10-30 parts of carbon black, 0-1 part of stearic acid, 60-80 parts of hydrophilic polyurethane resin, 130-150 parts of hydrophilic monomer, and 10-20 parts of modified montmorillonite; wherein, the rubber compound... The hydrophilic polyurethane resin obtained by mixing nitrile rubber and chloroprene rubber is obtained from a hydroxyethyl methacrylate-terminated polyether-type PU prepolymer; the crosslinking agent is obtained by reacting 4,4'-diaminodiphenylamine with 3,4-epoxycyclohexylmethyl methacrylate; the hydrophilic monomer includes sodium methacrylate; the modified montmorillonite is obtained by modifying montmorillonite with methacryloyloxyethyltrimethylammonium chloride; the polymer sealing material for PU valves of the present invention has low moisture permeability, good long-term sealing effect, good mechanical properties, and good weather resistance.

The utility model is applicable to the related technical field of sodium methacrylate, and provides a pumping device for reaction preparation of sodium methacrylate, which comprises a reaction cylinder, discharge pipes are respectively communicated with the periphery of the bottom of the reaction cylinder, valves are mounted on the four discharge pipes, a stirring component is arranged in the reaction cylinder, and the bottom of the reaction cylinder is provided with a water inlet. A pumping assembly is arranged at the upper end of the reaction cylinder; the pumping assembly comprises a first motor arranged in the middle of the top of the reaction cylinder, the output end of the first motor penetrates into the top of the reaction cylinder and is fixedly connected with a fixing disc, through the pumping assembly, multiple raw materials can be conveniently added, and meanwhile, during feeding, the first motor drives the fixing disc to rotate, so that uniform feeding and spraying are facilitated; by arranging the stirring assembly, stirring and mixing are facilitated, and meanwhile by arranging the scraping rod, the inner wall of the reaction cylinder can be scraped conveniently.

The invention relates to shampoo containing plant squalane small molecule oil and a preparation method of the shampoo. The shampoo containing the plant squalane small molecule oil is prepared from the following components in parts by mass: 3 to 5 parts of fatty alcohol-polyoxyethylene ether, 2 to 5 parts of cocamidopropyl betaine, 2 to 4 parts of sodium fatty alcohol-polyoxyethylene ether carboxylate, 0.1 to 2 parts of a cationic surfactant, 0.1 to 2 parts of amino acid, 1 to 2 parts of squalane, 0.1 to 1 part of modified squalene and a solvent, wherein the modified squalene is a product obtained by copolymerizing squalene, sodium methacrylate and methacrylic acid. According to the shampoo containing the plant squalane small molecule oil, the specific modified squalene and various surfactants are compounded with the active ingredients, so that the stability and dispersity of the ingredients are enhanced, the effect that the shampoo can be stored for a long time is ensured, the effects of cleaning and nourishing hair are achieved, and the shampoo has a good application prospect.

The present invention belongs to the technical field of concrete, and proposes a green environmentally friendly concrete mixed with recycled water and a preparation method thereof. The raw materials include, by mass, 117-246 parts of cement, 49-95 parts of slag powder, 68-124 parts of fly ash, 807-1021 parts of zone II medium sand, 250-920 parts of 5-10 mm crushed stone, 0-798 parts of 10-20 mm crushed stone, 3.8-7.21 parts of polycarboxylic acid water reducer, 2-3 parts of sodium methyl propylene sulfonate, 3-5 parts of polyethylene glycol 200, 8-12 parts of calcium sulfoaluminate, 3-15 parts of di-tert-butoxy diacetoxy silane, 6-10 parts of 2-(3,4-epoxycyclohexane) ethyl trimethoxy silane, 115-143 parts of ordinary water, and 50-62 parts of recycled water. Through the above technical scheme, the present invention improves the durability of concrete by improving the concrete formula containing recycled water.

The application relates to a preparation method and application of a hydrophilic / subaqueous oleophobic chitosan nanofiber membrane. The application belongs to the oil-water separation technical field. The method comprises the following steps: S1, preparing a chitosan solution and a polyvinyl alcohol solution; S2, preparing a modified solution; S3, electrospinning the modified solution prepared in the step S2 to obtain a hydrophilic modified nanofiber membrane; and S4, hot-pressing the prepared hydrophilic modified nanofiber membrane to obtain the hydrophilic / subaqueous oleophobic chitosan nanofiber membrane. The sodium methacrylate is used for modification in the application, can play a demulsification role in the oil-water separation process, and can increase the oil removal rate. The prepared chitosan nanofiber membrane has a hydrophilic structure and rich pore diameters, exhibits excellent stability, has relatively high permeability, low long-term operation permeability attenuation, and a long cleaning cycle. The hydrophilic / subaqueous oleophobic chitosan nanofiber membrane is applied to oil-water separation.

The present invention discloses a ZSM-5 molecular sieve with stepped pores and a preparation method thereof, comprising the following steps: step 1, mixing an aluminum source precursor, a template agent and a chelating dispersant to obtain an aluminum source precursor solution; step 2, mixing an aluminum source precursor solution with a silicon source precursor solution to obtain a molecular sieve crystallization mother solution; step 3, adding a seed to the molecular sieve crystallization mother solution, aging, crystallization, and obtaining a ZSM-5 molecular sieve with stepped pores; wherein the chelating dispersant is at least one of sodium ethylenediaminetetramethylenephosphonate, hydroxyethylidene diphosphonic acid, and sodium polymethacrylate. The present invention achieves the purpose of adjusting the micropores and mesopore size and ratio of the ZSM-5 molecular sieve by adding a chelating dispersant during the preparation of the ZSM-5 molecular sieve, and controlling the type and dosage of the chelating dispersant, so that the resulting ZSM-5 molecular sieve pore size distribution can meet the requirements of different raw materials, and finally achieves directional matching.

The invention relates to the technical field of cement-based materials, in particular to high-homogeneity cement paste as well as a preparation method and application thereof. The cement paste comprises the following raw materials in parts by mass: 40-60 parts of cement, 20-40 parts of modified microbeads, 10-30 parts of mineral powder, 22-28 parts of water and 1-2 parts of a composite hyperdispersant, the mass ratio of the polycarboxylate superplasticizer to the retarder to the defoaming agent in the composite hyperdispersant is (90-96): (2-8): (0.5-1); the molar ratio of the isopentenol polyoxyethylene ether to the sodium methallyl sulfonate to the acrylic acid in the polycarboxylate superplasticizer is 1: 0.5: 4.3; the preparation method comprises the following steps: mixing the cement, the modified microbeads, the mineral powder, the water and the composite hyperdispersant, and stirring at a segmented rotating speed to obtain the high-homogeneity cement paste. The high-homogeneity cement-based material is less in particle aggregation, good in slurry dispersity, higher in slurry fluidity and more sufficient in cement hydration under the same cement addition amount, so that the utilization rate of cement is increased, the production cost of concrete is reduced, and support is provided for green and low-carbon development of cement concrete.

This invention relates to the technical field of concrete and its additives, and provides a polycarboxylate superplasticizer, concrete containing the superplasticizer, and a preparation method thereof. The polycarboxylate superplasticizer of this invention uses acrylic acid and sodium methacrylate as small monomers, and is linked by C=C double bonds and -COO bonds. ‑ The triazine derivatives of the two-arm polyoxyethylene ether chains are macromonomers. Compared with conventional polycarboxylate superplasticizers, the polycarboxylate superplasticizer of this invention can both improve the anchoring effect of anions on the surface of cement particles and increase the steric hindrance effect that hinders the flocculation of cement particles. Therefore, it can significantly improve the dispersion ability of cement particles, improve the fluidity of cement paste, and hinder the flocculation of cement particles, thereby reducing the slump loss of concrete.

This invention discloses a smart nano-chemical oil displacement agent containing smart microspheres. The smart microspheres comprise: a core formed by nano-SiO2 and dodecyl phosphate monoester clusters; polyacrylamide and Fe3O4 nanoparticles sequentially attached to the surface of the core; and a shell formed by crosslinking poly(N-isopropylacrylamide) and sodium methacrylate. This invention also discloses its preparation and application. The preparation method of this invention is simple, and in the oil displacement process, the smart nano-chemical oil displacement agent of this invention achieves a controllable oil displacement process.

This invention discloses a pH-responsive magnetic nano-chemical oil displacement agent containing intelligent microspheres. The intelligent microspheres comprise a core formed by nano-SiO2 and dodecyl phosphate monoester clusters, with polyacrylamide and Fe3O4 nanoparticles sequentially attached to the surface of the core, and a shell formed by cross-linking sodium methacrylate. This invention also discloses its preparation and application. The oil displacement agent provided by this invention has mild preparation conditions, low cost, and good oil displacement effect, making it suitable for large-scale production. It can reduce energy consumption during the extraction process, reduce emissions and pollution, and improve crude oil recovery, thus having significant practical implications.

The invention relates to the technical field of spraying, in particular to a spraying material for reinforcing and supporting mine laneways and a preparation method and application of the spraying material. The spraying material is prepared from, by weight, 1-5 parts of metal organic frameworks and 30-40 parts of modified high-molecular polymers. The preparation method of the spraying material comprises the following steps: obtaining the metal organic framework through centrifugal washing, dispersing the pre-prepared modified high-molecular polymer in the metal organic framework to form a mixed solution, and drying the mixed solution at 80 DEG C, thereby obtaining the spraying material. The modified high-molecular polymer and the metal organic framework are uniformly mixed, so that uniform distribution of components in the composite material is ensured, and the stability and the reliability of the material are improved; the preparation method of the spraying material for reinforcing and supporting the mine laneway is simple in process, the protective net formed by copolymerization of acrylonitrile, methyl methacrylate and sodium methallyl sulfonate is selected, and the spraying material not only has excellent curing performance, but also can remarkably improve the overall strength and durability of the laneway.

The invention belongs to the technical field of metal wire processing aids, and particularly relates to high-water-solubility steel wire drawing lubricating powder which comprises 45-60 parts of stearate, 2-5 parts of an extreme pressure agent, 1-2 parts of an antirust agent, 2-5 parts of a lubricating aid, 1-2 parts of a water absorbent and 10-20 parts of sodium polyacrylate expandable microcapsules. Wherein the sodium polyacrylate expandable microcapsule is a microcapsule which takes cross-linked sodium polyacrylate and / or cross-linked sodium polymethacrylate as a shell and takes a low-boiling-point organic matter as a core. The interior of the microcapsule in the lubricating film layer on the surface of the drawn steel wire is gasified and expanded to loosen the lubricating film layer, so that the lubricating film layer is more easily cleaned and flushed away from the surface of the steel wire, and adhesion and retention of lubricating powder components on the surface of the steel wire after cleaning are effectively reduced.

The invention belongs to the technical field of lithium batteries, and particularly relates to a water-based HTPB binder for a positive electrode of a lithium battery and a preparation method of the water-based HTPB binder. The invention provides a high-molecular polymer composite water-based adhesive with a core-shell structure based on an HTPB water-based technology, the high-molecular polymer composite water-based adhesive is prepared by mainly adopting allyl isocyanate to carry out propenylation on HTPB and then carrying out emulsion polymerization on the HTPB, a sodium methacrylate solution, acrylonitrile, acrylamide and an acrylate monomer, and the product is free of VOC (Volatile Organic Compounds) residue and has the advantages of environmental protection, environmental protection and the like. The water-based adhesive is an environment-friendly, non-toxic and pure green water-based adhesive. Compared with the existing water-based positive electrode binder, the water-based HTPB binder provided by the invention has the advantages that the toughness is enhanced by more than two times, and the stripping force is also improved by more than one time. The capacity retention ratio of a battery prepared from the water-based HTPB binder provided by the invention is still more than 80% after 6000 cycles.

This invention relates to an organic hydrotalcite / polycarboxylate composite paste for vat dye printing on acrylic / viscose blended fabrics, its preparation method, and its application. The paste is prepared by the following method: First, an aqueous solution of polycarboxylate is prepared using acrylic acid, sodium methacrylate, methoxy polyethylene glycol methacrylate, and 2-acrylamide-2-methylpropanesulfonic acid as raw materials; second, hydrotalcite is prepared by reacting magnesium nitrate, calcium nitrate, and aluminum nitrate; then, the hydrotalcite is reacted with sodium dodecyl sulfonate to prepare an organic hydrotalcite; finally, the aqueous solution of polycarboxylate is reacted with the organic hydrotalcite to obtain the organic hydrotalcite / polycarboxylate composite paste. The organic hydrotalcite / polycarboxylate composite paste prepared by this invention is used for vat dye printing on acrylic / viscose blended fabrics. The resulting printed fabric exhibits characteristics such as a desizing rate higher than 92%, good softness, high outline clarity, penetration rate higher than 82%, and high fastness to dry rubbing and washing, showing great application potential.

The present invention discloses a preparation method of a degradable polypropylene spunbond nonwoven fabric, belonging to the technical field of nonwoven fabrics. The preparation method includes: preparing an oxidation degradation masterbatch, preparing a soft masterbatch, preparing the s-layer spinning, preparing the m-layer spinning, hot rolling and slitting; for preparing the soft masterbatch, a acetone solution of maleic anhydride, polylactic acid, diisopropylbenzene peroxide, styrene and sodium methacrylate are added to a high-speed mixer and mixed evenly, then the acetone is completely volatilized, and then added to a twin-screw extruder for the first melt extrusion. After the first melt extrusion is completed, a mixture is obtained; the mixture and erucamide are added to the twin-screw extruder for the second melt extrusion. After the second melt extrusion is completed, a soft masterbatch is obtained; the present invention can achieve the biodegradation of polypropylene spunbond nonwoven fabrics, and while improving the softness of polypropylene spunbond nonwoven fabrics, improve the strength, ultraviolet resistance and high-temperature resistance of polypropylene spunbond nonwoven fabrics.

The present invention belongs to the technical field of concrete admixtures, and specifically relates to a water reducing agent for concrete and a preparation method thereof. The preparation method comprises the following steps: adding montmorillonite to a stearyl trimethyl ammonium chloride solution, adding zinc chloride, adjusting the pH, stirring the reaction, calcining the obtained product, obtaining pretreated montmorillonite, adding the montmorillonite, aluminum nitrate and magnesium nitrate to water, adding sodium hydroxide and sodium carbonate, stirring the reaction to obtain a first modified montmorillonite, adding the montmorillonite to water and dispersing it uniformly, adding a surfactant, adjusting the pH, stirring the reaction to obtain a second modified montmorillonite, adding the montmorillonite and allyl polyoxyethylene ether to concentrated sulfuric acid, stirring the reaction, adding the product, sodium methacrylic acid, methacrylic acid, and hydroquinone to water to obtain a solution A, taking an initiator and adding it to water to obtain a solution B, respectively dropping the solution A and the solution B into water, and then keeping warm, adjusting the pH, collecting the product, and adding nano-hydroxyapatite to the product to obtain the product.

The invention discloses a preparation method of a methacrylic resin monomer containing a lactone structure, which comprises the following steps: by taking alpha-bromo-gamma-butyrolactone and sodium methacrylate as raw materials and N, N-dimethylformamide as a solvent, reacting at 80-95 DEG C, and carrying out primary filtration and filtrate concentration, concentrated solution redissolution and secondary filtration, secondary filtrate washing, liquid separation, drying and tertiary filtration to obtain the methacrylic resin monomer containing the lactone structure. The preparation method comprises the following steps: preparing a 2-carbonyl-tetrahydrofuran-3-hydroxyl-methacrylate crude product from alpha-bromo-gamma-butyrolactone and sodium methacrylate according to a molar ratio of 1: (1.3-1.5), and rectifying the crude product to obtain a 2-carbonyl-tetrahydrofuran-3-hydroxyl-methacrylate product; according to the synthetic route, the used raw materials are all products commonly used in the field of chemical engineering and are low in price, high-toxicity substances such as a polymerization inhibitor are not needed in the preparation process, and the cost of the raw materials is greatly reduced; the synthesis process route is shorter, the operation is simple, purification of an intermediate is not needed, the production process is simplified, and the product yield is also improved.

The invention relates to the technical field of high polymer materials, and discloses a modification method of an anti-hydrolysis EMAA-Na < + > copolymer for laminated glass, which is characterized in that sodium methacrylate (Na < + > MAA) in the EMAA-Na < + > copolymer is catalyzed by a metal catalyst to be converted into methacrylic acid (MAA) in an acidic system, and after post-treatment, the hydrolysis-resistant EMAA-Na < + > copolymer is obtained. The hydrolysis-resistant EMAA-Na < + > copolymer for the laminated glass is obtained. The ethylene-methacrylic acid-sodium methacrylate (EMAA-Na < + >) copolymer is modified, so that the ethylene-methacrylic acid-sodium methacrylate (EMAA-Na < + >) copolymer has remarkable hydrolysis resistance, and the physical, chemical and optical properties of the material are comprehensively improved.