86 results about "Anisole" patented technology

The invention relates to the technical field of synthesis of organic compounds, and discloses a synthesis method of an o-aminoanisole compound, which comprises the following steps: preparing a composite alkali slow-release system consisting of inorganic alkali and organic alkali; preparing a catalytic reduction reaction system containing a metal complex stabilizer, a transition metal catalyst and a hydrophilic ether cosolvent; a catalytic reduction reaction of o-nitroanisole is carried out, and the slow-release alkali-coated material gradually releases the composite alkali to maintain a stable pH environment; after the reaction is completed, adding a packing material rapid digesting agent to remove a packing material structure, and meanwhile, rapidly separating and protecting a product by using a product protective extracting agent and an antioxidant synergistic protective agent; and purifying and recovering the final product to obtain a high-purity o-aminoanisole product. The reaction efficiency, the product purity, the service life of the catalyst and the separation efficiency are comprehensively improved through the synergistic effect of the eight components, the product purity reaches 99.5% or above, the catalyst can be recycled for 5-8 batches, and the separation time is shortened to 0.5-1 hour.

The invention discloses a method for preparing three-dimensional graphene foam from organic silicon waste liquid, the three-dimensional graphene foam and application, and the preparation method comprises the following steps: (1) preheating and evaporating the organic silicon waste liquid to obtain organic silicon waste liquid steam, and mixing the organic silicon waste liquid steam with water vapor to obtain organic silicon waste liquid steam; then hydrolyzing in an inert atmosphere with a carrier gas flow rate of 100-1000 sccm, cooling, filtering to obtain synthesis gas, and passing the synthesis gas through an alkaline substance to obtain purified synthesis gas; (2) introducing the purified synthesis gas into a reaction furnace, carrying out a chemical vapor deposition reaction by taking foamed nickel as a substrate to obtain a three-dimensional graphene foam initial product and hydrogen-rich synthesis gas, and then preparing the hydrogen-rich synthesis gas on the surface of the three-dimensional graphene foam initial product according to the dosage per unit area of 0.2-1.0 mL / cm < 2 >, an anisole solution proppant of polymethyl methacrylate with the mass content of 5%-10% is coated, and then the three-dimensional graphene foam is obtained through acid etching. The three-dimensional graphene foam prepared by the method has excellent conductivity, is suitable for the field of functional materials such as electromagnetic shielding materials, and has a good industrial application prospect.

The present application relates to a kind of phenol and methanol directly prepared (methyl) anisole mode, the method includes the following steps: under the action of composite catalyst, phenol and methanol are catalytically generated methyl anisole, the composite catalyst is Ho / β molecular sieve catalyst and Ti / UiO-66 with mass ratio Ho / β:Ti / UiO-66 0.3-0.6:1 Mixed composite catalyst.The process reaction step is simple, and synthesis is realized in one step, and the total selectivity of methyl anisole is as high as 76% or more, and can be continuously and stably operated for 3000h.

The invention discloses a UV (ultraviolet)-heat dual-curing waterborne polyurethane emulsion and a preparation method thereof. According to the UV-thermal dual-curing waterborne polyurethane emulsion, the heat resistance, the water resistance and the mechanical property of UV-WPUA can be improved, and meanwhile, the storage stability and the yellowing problem of the UV-WPUA can be improved; the polyurethane foam is prepared from the following components in parts by weight: 60-70 parts of binary isocyanate; 35 to 45 parts of polypropylene carbonate; 0 to 12 parts of 1, 4-butanediol; 50 to 55 parts of an acrylate monomer; 0.1 to 0.2 part of p-hydroxyanisole; 0 to 18 parts of sulfydryl silane; 0.1 to 0.3 part of an organic tin catalyst; 5-10 parts of a solvent; 100 to 150 parts of deionized water; belongs to the technical field of coatings.

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 diphenyl carbonate reactive distillation system comprises a reactive distillation tower, a reflux pipeline, a tower top reflux tank, a first condenser, a methanol recovery system, a reflux pump, a side extraction pipeline, a side extraction pump, a buffer tank, a discharge pipeline, a tower bottom pump and a flash tank, a tower top liquid material of the reactive distillation tower enters a tower top reflux tank through a reflux pipeline, and a gas material enters a methanol recovery system after being condensed by a first condenser; controlling the reflux ratio, and refluxing the material in the tower top reflux tank; the reactive distillation column is provided with a height-adjustable side line extraction opening for extracting by-products such as anisole; and separating the reaction organisms through a flash tank to obtain diphenyl carbonate. The device integrates chemical reaction and rectification separation, methanol is separated from a material refluxed at the top of the tower, by-products such as anisole are extracted from a side line, the thermodynamic equilibrium of the reaction is broken, and the reaction is pushed to proceed in the positive direction, so that the conversion rate is increased, and meanwhile, a plurality of by-products are obtained; and the side line extraction position is adjustable, safe and convenient.

The invention relates to a catalyst for preparing anisole through phenol methanol etherification as well as a preparation method and application of the catalyst. The catalyst takes aluminum phosphate as a carrier and is doped with zirconium oxide; on the basis of the mole number of Al, the mole ratio of P to Al is (0.05-2): 1, and the mole ratio of Zr to Al is (0.08-0.20): 1. Dropwise adding the aluminum-zirconium mixed aqueous solution into the phosphorus source aqueous solution, stirring, standing and washing to obtain a solid sample; and drying and roasting the solid sample to obtain the aluminum phosphate catalyst. Under the action of the catalyst, phenol and methanol are catalyzed to generate anisole. Compared with the prior art, the phenol conversion rate is greater than or equal to 50%, the anisole selectivity is greater than or equal to 85%, highly toxic dimethyl sulfate and a large amount of alkali are not needed, the process is green, the cost is low, separation is simple, and the method is suitable for large-scale industrial production of anisole.

The application relates to an anti-aging high-whiteness BOPP matt white label film and a preparation method thereof, and belongs to the technical field of white label films. The anti-aging high-whiteness BOPP matt white label film comprises a matt layer, a core layer and a smooth layer arranged in sequence; the matt layer comprises random copolymerized polypropylene, 40-45 wt% high-density polyethylene, 2-4 wt% ethylene-2-allyl benzene methyl ether random copolymer and 0.1-0.5 wt% antioxidant; the core layer comprises homopolymerized polypropylene and 10-20 wt% white masterbatch, the white masterbatch comprises homopolymerized polypropylene, 5-10 wt% ultrahigh molecular weight polyethylene and 50-70 wt% surface-modified titanium white powder, and the organic coating agent used in the surface-modified titanium white powder is bis[(3-methyl dimethoxy silyl) propyl] polyoxypropylene. The label film has the advantages of anti-aging, high whiteness, good matt uniformity and good whiteness uniformity.

The invention provides a polymer type anti-wax pour point depressant and a preparation method thereof.The preparation method comprises the steps that long-carbon-chain alpha-olefin, short-carbon-chain acrylics, maleimide and 4-allyl anisole are dissolved in a solvent, then an initiator is added for a reaction, and the polymer type anti-wax pour point depressant is obtained; the prepared polymer type paraffin and pour point depressant can effectively act on wax crystals, such as a long carbon chain, an imide group, an ether bond, an ester group and the like, and has more acting groups and stronger acting effect compared with a conventional paraffin inhibitor, and the prepared polymer type paraffin and pour point depressant solves the problems of poor paraffin inhibition effect, poor pour point depression effect and high toxicity of a common oil-based polymer paraffin and pour point depressant.

The invention relates to palmitoyl tripeptide-38 and a preparation method and application thereof.According to the palmitoyl tripeptide-38, low-toxicity and biodegradable NFM and anisole are compounded according to the volume ratio of 1: 1, and the palmitoyl tripeptide-38 has strong polarity and moderate hydrophobicity and can completely replace DMF. According to the mixed solvent, the solubility of Fmoc amino acid monomers, activating reagents and resin is improved, the risk of reproductive toxicity is avoided, and the volatility is reduced compared with that of DMF (Dimethyl Formamide); the process is synergistically enhanced, namely, the mass transfer limitation of the traditional intermittent reaction is overcome through the synergism of the laminar shear effect and the ultrasonic cavitation effect of a continuous flow reaction device, so that the coupling reaction time of the palmitoyl tripeptide-38 is shortened, the occurrence rate of side reaction is reduced, and the universality verifies that the solvent system has excellent performance in synthesis of the palmitoyl tripeptide-38, and the solvent system is suitable for industrial production. And the coupling efficiency is stable.

The invention belongs to the technical field of electrolysis, and discloses a method for preparing p-hydroxyanisole through electrolytic oxidation of anisole. The method comprises the following steps: S1, adding anisole, an acylation reagent, an organic alkali proton trapping agent and an alkaline amine group-containing solvent into a single-chamber electrolytic bath together, starting electrification, carrying out electrolysis, and obtaining a product liquid containing p-methoxytrifluoroacetic acid phenyl ester in the single-chamber electrolytic bath after electrolysis is finished; the organic base proton trapping agent is at least one of N, N-diisopropylethylamine, tributylamine and tripropylamine; and S2, adding a saturated sodium bicarbonate aqueous solution into the product liquid containing p-methoxytrifluoroacetic acid phenyl ester in the step S1 to hydrolyze p-methoxytrifluoroacetic acid phenyl ester, and extracting to obtain p-hydroxyanisole. The selectivity of para-position and ortho-position products of methoxyl on anisole is regulated and controlled, so that the selectivity of p-hydroxyanisole prepared by the method is higher.

The application discloses a preparation method of o-bromoanisole. The o-bromoanisole is synthesized through three steps, anisole is used as raw material, p-sulfonic anisole is first synthesized, 2-bromo-4-sulfonic anisole is synthesized on the basis, and finally, the sulfonic group is removed to obtain o-bromoanisole. Since anisole is used as raw material, the problems of multiple by-products, low yield and low purity existing in the synthesis path of phenol are avoided. Meanwhile, all the raw materials of the application have low cost, the process steps are simple, and etherification is not needed. Meanwhile, since anisole is used as raw material, hydrobromic acid and hydrogen peroxide can be used in the intermediate step, the hydrobromic acid is oxidized to generate bromine, the reaction rate can be controlled, the reaction efficiency is improved, the waste of bromine is reduced, the purity of the prepared product can reach 99.4%, the yield reaches 96.26%, and the product can be applied on a large scale in industry.

The application provides a production method of 2-amino-4-acetylamino anisole, relates to the technical field of organic chemical synthesis, and comprises the following steps: continuously acetylating p-aminoanisole in a tubular reactor, neutralizing, crystallizing and drying to obtain an intermediate. The intermediate, concentrated sulfuric acid and a specific auxiliary A are mixed to form a substrate liquid, and the substrate liquid is subjected to a nitration reaction with a nitration mixed acid in a three-stage continuous reaction kettle. The auxiliary A is composed of perfluoropolyether oil, boron nitride nanosheet, polyethylene glycol perfluorooctyl ether block copolymer and lipophilic fumed silica. The nitration liquid is quenched, extracted and crystallized to obtain a nitration product. The nitration product is dissolved in ethanol, and catalytic hydrogenation is carried out in a fixed bed reactor. The hydrogenation product is subjected to post-treatment to obtain 2-amino-4-acetylamino anisole. The application remarkably improves the reaction selectivity, yield and product purity through the cooperation of the continuous process and the specific auxiliary, and the by-products are few, so that the method is suitable for industrial production.

The invention relates to a synthesis process for co-production of p-hydroxyanisole and o-hydroxyanisole, anisole and hydrogen peroxide are used as raw materials, and under the action of a catalyst and an auxiliary agent, the content of p-hydroxyanisole and o-hydroxyanisole can be adjusted. The additive is prepared by taking benzothiophene as a raw material through alkyl ether, ethynylation and ring closing reaction, has certain solvent effect and limiting effect, and can change the proportion of p-hydroxyanisole to o-hydroxyanisole in a product.

The application discloses a lithium salt particle size measuring method, and belongs to the technical field of material measurement. The measuring method comprises the following steps: step S1: obtaining a lithium salt powder to be measured; step S2: under the condition that the dew point temperature of a measuring environment is less than or equal to-45 DEG C, dispersing the lithium salt powder in a dispersion medium to form a lithium salt suspension; measuring the particle size of the lithium salt in the lithium salt suspension by using a particle size measuring device to obtain the particle size of the lithium salt powder; wherein the dispersion medium is selected from at least one of n-heptane, n-dodecane, n-undecane, n-decane, n-hexane, toluene, xylene, anisole and butyl butyrate. The lithium salt particle size measuring method is particularly suitable for the particle size measurement of hygroscopic / dissolvable samples, has high measurement precision and good repeatability, and the relative standard deviation (RSD) is less than 2%.

This invention provides an inorganic-organic composite solid electrolyte membrane and its preparation method, belonging to the field of solid electrolyte membrane technology. The invention uses anisole and tetrahydrofuran as a mixed solvent to dissolve methyl-terminated PEO. Tetrahydrofuran weakens the interaction between the ether oxygen atoms on the PEO chain and anisole, promoting the dispersion of PEO in the mixed solvent and facilitating the formation of a homogeneous coating slurry. Meanwhile, methyl-terminated polyethylene oxide not only improves the loss of ionic conductivity after the sulfide solid electrolyte is composited with a non-ionic binder, but its methyl termination also inhibits the degradation effect of polyethylene oxide on the sulfide solid electrolyte, better preserving the high-performance characteristics of the sulfide. Furthermore, the addition of Li3PO4 increases the lithium ion transport rate in polyethylene oxide, thereby improving the ionic conductivity of the composite solid electrolyte membrane.

This invention discloses a cobalt zeolite catalyst, its preparation method, and its application in the oxidation reactions of benzylamine, alcohols, and anisole sulfides, specifically relating to alcohol oxidation, amine oxidative coupling, and sulfide oxidation reactions. This invention further expands the application scope of cobalt zeolite catalysts, clarifying their suitability for the oxidation reactions of alcohols, amines, and sulfides. The catalyst is prepared via in-situ hydrothermal synthesis, and its catalytic performance can be optimized by precisely controlling pore size, cobalt species dispersion, and their existing forms. Under oxygen or air atmospheres, this catalyst can efficiently achieve highly selective oxidation of benzyl alcohols, while simultaneously promoting the oxidative coupling reactions of benzylamines and the selective oxidation reactions of sulfides. The cobalt zeolite catalyst provided by this invention has clearly defined application scenarios, mild reaction conditions, and demonstrates significant industrial application potential, providing important theoretical reference and practical direction for catalyst development in the field of green organic synthesis.

This invention discloses a highly selective synthesis method for isovlandrin, comprising the following steps: Step S1, reacting guaiacol with a benzylating agent in the presence of an alkaline catalyst and an organic solvent to generate o-benzyloxyanisole; Step S2, reacting the o-benzyloxyanisole with a Vilsmeier-Haack reagent for formylation to obtain 3-benzyloxy-4-methoxybenzaldehyde; Step S3, mixing 3-benzyloxy-4-methoxybenzaldehyde with a 65wt%-70wt% aqueous sulfuric acid solution to perform an acid debenzylation reaction to obtain crude isovlandrin; Compared with the prior art, the yield of isovlandrin can reach up to 70% or more, and the selectivity is greatly improved.

The application discloses a new preparation method of an intermediate of imatinib, and relates to the technical fields of medicines and chemical industry. The intermediate of imatinib, i.e. a-amino-2-methoxy-4-methanesulfonamido-5-phenoxyphenylacetophenone, is synthesized by taking 3-methanesulfonamido-4-phenoxyanisole and chloroacetyl chloride as raw materials, perfluoro-tert-butyl alcohol as a solvent, and D72 strong-acid macroporous resin as a catalyst, and then reacting with ammonia after a-chloro-2-methoxy-4-methanesulfonamido-5-phenoxyphenylacetophenone is synthesized. The application greatly improves the yield and purity, overcomes the shortcomings of the prior art in safety production, environmental protection and clean production, has a simple route, high reaction safety, convenient post-treatment, and effectively reduces the production cost, and is suitable for large-scale production.

This invention relates to the field of hydrophobic anti-icing coating technology, specifically to a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating and its preparation method, comprising the following steps: S1. Mixing a silane modifier, anhydrous ethanol, and deionized water, adjusting the pH to obtain a cocondensate; S2. Mixing the cocondensate, functional monomer modifier, and solvent, then adding p-hydroxyanisole, precipitating, filtering, and drying to obtain a modified PMMA prepolymer resin; S3. Mixing the modified PMMA prepolymer resin, methyl methacrylate, and solvent, purging with nitrogen to remove oxygen, then adding nano-silica, a substrate wetting agent, and a dispersant, dispersing, grinding, and sieving, and finally adding benzoyl peroxide to obtain the modified PMMA superhydrophobic anti-icing coating. This invention effectively avoids phase separation through chemical grafting, ensuring that hydrophobic segments are uniformly distributed on the coating surface and within the coating, significantly improving the hydrophobic stability and durability of the coating, breaking through the technical bottleneck of traditional PMMA coatings where hydrophobicity, hardness, and durability are difficult to balance.

A separator for lithium-ion batteries and a modification method. The modification method comprises: using anisole as a solvent, octakis(chloropropyl)silsesquioxane as an initiator, methyl methacrylate as a monomer, cuprous chloride as a catalyst, and pentamethyldiethylenetriamine as a ligand, and synthesizing polymethacrylate-polyhedral oligomeric silsesquioxane by means of an atom transfer radical polymerization method; preparing a modified slurry from the polymethacrylate-polyhedral oligomeric silsesquioxane; and coating a surface of a base film of a separator with the modified slurry and drying same, so as to obtain a separator coated with polymethacrylate-polyhedral oligomeric silsesquioxane. The improved technique not only achieves significant effects in terms of improving the mechanical properties and thermal stability of a separator, but also realizes the optimization of cost efficiency and supply stability while maintaining good electrolyte wettability and reducing the internal resistance of a battery cell, thereby exhibiting potential in a wide range of applications.

The invention belongs to the field of novel preparation methods of magnesium-aluminum hydrotalcite, and particularly relates to a preparation method of a magnesium-aluminum composite oxide-based catalyst and application of the magnesium-aluminum composite oxide-based catalyst in preparation of anisole. Magnesium nitrate hexahydrate and sodium metaaluminate are respectively dissolved in deionized water, stirred until being dissolved, mixed and aged; carrying out suction filtration, drying and grinding to obtain a catalyst precursor magnesium-aluminum hydrotalcite; the preparation method comprises the following steps: dipping magnesium-aluminum hydrotalcite into a metal salt solution, heating and stirring in a water bath, and carrying out dipping, drying and roasting cycles for several times to obtain a magnesium-aluminum composite oxide-based catalyst; the metal salt at least contains one of lanthanum, barium, manganese and zirconium metal salts. The active component elements of the catalyst are transition metal, alkaline earth metal and rare earth metal oxides and do not contain noble metal, so that the preparation cost is low; active components are loaded on the surface of the magnesium-aluminum composite oxide carrier in a one-step loading manner, and the process is simple and convenient.

The invention relates to a pharmaceutical dosage form for oral administration comprising (i) an intragranular phase, which comprises Sertraline or a physiologically acceptable salt thereof; one or more intragranular fillers (preferably selected from one or more sugar alcohols or sugars; preferably mannitol or lactose, more preferably mannitol); one or more intragranular antioxidants (preferably selected from butylated hydroxytoluene (BHT), butylated hydroxy anisole (BHA), tocopherol or derivatives thereof, ascorbic acid or derivatives thereof, sodium metabisulphite, propyl gallate, sodium thiosulphate, or any combination thereof, more preferably ascorbic acid); (ii) an extragranular phase, which comprises one or more extragranular fillers (preferably mannitol, microcrystalline cellulose, lactose, or any combination thereof); and (iii) optionally, a film coating. The invention further relates to a process for manufacture by wet granulation, wherein the antioxidant is preferably dissolved in the granulation liquid.

This invention provides an electrochemical synthesis method for anisaldehyde. The method uses a carbon paste modified with a polyethersulfone framework containing embedded acidic groups as the electrode material. Under the action of an electrolyte salt, anisaldehyde is prepared by electrochemical oxidation of 4-methylanisole in the anolyte chamber and by electrochemical reduction to generate hydrogen in the cathode chamber. This method enhances the thermal stability, chemical stability, and conductivity of the electrodes, enabling continuous and stable operation of the electrolysis device for over 3000 hours. Furthermore, it achieves the conversion of anisaldehyde in one step, reducing the need for acetal hydrolysis.

The invention belongs to the technical field of photoacid generators, and particularly relates to a fluorine-containing sulfonate photoacid generator and a synthesis method thereof, the fluorine-containing sulfonate photoacid generator has a structural formula shown in the specification, the solubility of the fluorine-containing sulfonate photoacid generator in propylene glycol monomethyl ether acetate is 2.5% (w / w), and the solubility of the fluorine-containing sulfonate photoacid generator in gamma-butyl lactone is 14.0% (w / w). The synthesis method comprises the following steps: firstly, carrying out Friedel-Crafts reaction, carbonyl protection, addition condensation, deprotection, salification and other reactions on anisole and 3, 3-dimethylbutyryl chloride serving as starting materials to obtain a cationic intermediate M3, then carrying out substitution sulfonation, reduction, carbonation and other reactions on ethyl bromofluoroacetate serving as a starting material to obtain an anionic intermediate M6; according to the synthesis method, the yield is high, the purity is 99% or above, the synthesis process is easy and convenient to operate, safe and environmentally friendly, the single-batch mass production reaches the kilogram level, and photoresist supply can be met.

This invention relates to an aging-resistant, high-whiteness BOPP matte white label film and its preparation method, belonging to the technical field of white label films. The aging-resistant, high-whiteness BOPP matte white label film comprises a matte layer, a core layer, and a glossy layer arranged sequentially. The matte layer comprises random copolymer polypropylene, 40-45 wt% high-density polyethylene, 2-4 wt% ethylene-2-allyl anisole random copolymer, and 0.1-0.5 wt% antioxidant. The core layer comprises homopolymer polypropylene and 10-20 wt% white masterbatch, which comprises homopolymer polypropylene, 5-10 wt% ultra-high molecular weight polyethylene, and 50-70 wt% surface-modified titanium dioxide. The surface-modified titanium dioxide uses bis[(3-methyldimethoxysilyl)propyl]polyoxypropylene as the organic coating agent. This label film has the advantages of aging resistance and high whiteness, and also exhibits good matte uniformity and whiteness uniformity.

The application discloses a process method for synthesizing 2-fluoro-4-hydroxybenzaldehyde and belongs to the technical field of pharmaceutical intermediates. Intermediary fluorobenzene ether is used as raw material, is subjected to Grignard exchange with a TEMPMgCl-LiCl solution to generate 2-fluoro-4-methoxybenzaldehyde, and then is subjected to deprotection through a mixed Lewis acid catalyst to generate 2-fluoro-4-hydroxybenzaldehyde. The method has the advantages of good selectivity, high yield, easy operation, potential technical advantages and suitability for industrial amplification production, and avoids the problems of low yield, complicated steps and difficult product purification in other routes.

The invention discloses an anethole synthesis method, and relates to the technical field of fine chemical engineering, and the anethole synthesis method comprises the following steps: 1, taking 4-n-propyl anisole as an initial raw material, and oxidizing the reaction by using air under a solvent-free condition to obtain p-methoxypropiophenone; 2, reducing the p-methoxypropiophenone into 1-(4-methoxyphenyl)-1-propanol by taking aluminum isopropoxide as a catalyst and isopropanol as a reducing agent; and 3, by taking concentrated sulfuric acid as a dehydrating agent, removing hydroxyl of the 1-(4-methoxyphenyl)-1-propanol to obtain anethole. The method has the beneficial effects that air is used for oxidation in the first step, no solvent is used, reaction conditions are simple, post-treatment is convenient, and the reaction conversion rate is high; in the second step, Meerwein-Ponndorf-Verley reduction reaction is used for the first time, dangerous processes such as hydrogenation reduction or hydroboration reduction are avoided, reaction conditions are mild, aftertreatment is simple, and the reaction conversion rate is high.

The application discloses a kind of high impact resistance acrylic resin and preparation method thereof, it is made of acrylic acid, caprolactone, p-toluene sulfonic acid, p-hydroxyanisole (MEHQ), styrene, butyl acrylate, initiator, ethylene glycol butyl ether and other raw materials.The application obtains a water-soluble acrylic resin by optimizing the synthesis path.And the application obtains the best raw material composition and proportion by a large number of experiments screening, and preferably obtains a component ratio scientific and reasonable, and synthesizes a water-soluble acrylic resin with good impact resistance, high hardness and good adhesion.

The present application relates to the technical field of packaging materials, in particular to a food-grade composite packaging material with air permeability and waterproofness and a production process thereof.The food-grade composite packaging material comprises a polypropylene waterproof layer, a microporous air-permeable layer, a polyvinylidene fluoride contact layer and a polyurethane adhesive binder; the microporous air-permeable layer comprises the following components: 40-60 parts by weight of polyvinyl alcohol modifier, 10-20 parts by weight of ammonium bicarbonate pore former, 2-5 parts by weight of tributyl citrate plasticizer, 0.5-2 parts by weight of butylated hydroxyl anisole antioxidant, 1-3 parts by weight of sodium dodecyl sulfate surfactant and 5-10 parts by weight of epoxy resin crosslinking agent; polyvinyl alcohol is selected as a base material, cellulose nanocrystals are selected as a particle filler, and 3-glycidyl ether oxypropyl trimethoxysilane is selected as a grafting modifier.The microporous air-permeable layer allows oxygen, carbon dioxide and other gas molecules to selectively permeate through the microporous structure formed by the pore former, maintains the gas exchange inside the package, prolongs the shelf life of food, and at the same time maintains the integrity of the package.