178 results about "Alpha-naphthol" patented technology

The invention discloses a polyimide intrinsic microporous membrane, a diamine monomer adopted by the polyimide intrinsic microporous membrane and a preparation method of the polyimide intrinsic microporous membrane and the diamine monomer. The polyimide intrinsic microporous membrane is prepared from a dianhydride monomer and the diamine monomer with a dibenzo spirofluorene xanthene structure, the diamine monomer with the dibenzo spirofluorene xanthene structure is prepared by the following steps: firstly, condensing substituted or unsubstituted 2-nitro-9-fluorenone with 1-naphthol, then carrying out nitration, and finally, carrying out reduction, thereby obtaining the diamine monomer with the dibenzo spirofluorene xanthene structure. The dibenzo spirofluorene xanthene structure contained in the polyimide intrinsic microporous membrane can effectively reduce the dielectric constant of a polymer, the polyimide intrinsic microporous membrane can be applied to the technical field of electronics and microelectronics, the asymmetric diamine structure enables a main chain of a macromolecular chain to be twisted, the twisted macromolecular chain can effectively enlarge interchain pores, and therefore the polyimide intrinsic microporous membrane has the advantages that the dielectric constant of the polymer can be effectively reduced; therefore, the free volume of the polymer is increased, the polymer has higher permeability, selectivity can be balanced, and the polymer can be applied to the technical field of membrane separation.

The invention provides an alkaline phosphatase color developing solution and a preparation method thereof, and particularly relates to the technical field of immunodetection, the alkaline phosphatase color developing solution is formed by dissolving chromogen dry powder in a color developing buffer solution, and the concentration is 1-3 mg / ml; wherein the chromogen dry powder is composed of naphthol AS-MX phosphate and fast red-TR; the preparation method comprises the following steps: S1, dissolving naphthol AS-MX phosphate and fast red TR with purified water to obtain a solution; wherein the concentration of naphthol AS-MX phosphate in the solution is 0.5 to 1.5 mg / ml, and the concentration of fast red TR is 0.5 to 1.5 mg / ml; s2, freezing and storing the solution in a refrigerator, and condensing the solution into ice blocks; s3, the ice blocks are put into a freeze dryer, vacuumizing is carried out, water molecules in the ice blocks are sublimated into water vapor under the negative pressure condition, the water vapor is discharged, and chromogen dry powder can be obtained; s4, the chromogen dry powder is dissolved in the chromogenic buffer solution, and an alkaline phosphatase chromogenic solution can be obtained; the prepared developing solution has the core advantages of high sensitivity, rapid developing, multicolor compatibility, digital adaptation and the like, and an efficient and reliable tool is provided for pathological research and clinical diagnosis.

The invention discloses a preparation method and application of a chiral phosphoric acid intrinsic microporous polymer membrane. In the invention, R / S-1, 1 '-co-2-naphthol and indole-2, 3-dione or a derivative thereof are taken as monomers, and the soluble chiral polymer with an intrinsic microporous structure is prepared through catalytic polymerization. After the polymer forms a film, phosphorylation treatment is carried out, a phosphate group is introduced, and the chiral phosphoric acid intrinsic microporous polymer film is obtained. The membrane has high specific surface area and chiral recognition sites, shows excellent enantiomer selectivity and permeability, can be widely applied to efficient separation of chiral small molecular enantiomers, has important application value and popularization prospect in the field of chiral separation, can simultaneously realize integration of microporous channels, chiral environments and multifunctional phosphate groups, and has broad application prospects. Therefore, breakthrough balance is achieved between chiral selectivity and permeation flux, and a new material platform is provided for chiral membrane separation.

The invention relates to the technical field of fine chemical engineering, and discloses electronic-grade solid naphthyl epoxy resin as well as a preparation method and application thereof.The preparation method specifically comprises the following steps: (1) firstly, adding epoxy chloropropane and isopropanol into dihydroxy dinaphthyl methane of two isomers, and stirring and dissolving to obtain a mixture A; (2) dropwise adding alkali liquor into the mixture A, and carrying out etherification reaction to obtain a mixture B; (3) dropwise adding alkali liquor into the mixture B, carrying out ring-closure reaction, separating liquid and removing salt to obtain an organic phase layer solution C; (4) washing the organic phase layer solution C with water, and performing reduced pressure distillation to obtain an epoxy resin crude product; (5) adding a solvent into the epoxy resin crude product, heating and dissolving, dropwise adding alkali liquor, carrying out refining reaction, separating liquid and removing salt to obtain an organic phase layer solution D; and (6) washing the organic phase layer solution D with water, and carrying out reduced pressure distillation to obtain the alpha-naphthol bifunctional solid epoxy resin. The product disclosed by the invention is low in total chlorine content, high in purity, relatively high in yield and excellent in heat resistance, and can be applied to the fields of epoxy resin molding compounds, semiconductor chip packaging and the like.

The application provides a method for preparing 2-hydroxy-1,4-naphthoquinone, which comprises the following steps: S1: dispersing 2-naphthol, a phase transfer catalyst and a base in water to obtain a 2-naphthol alkali solution; S2: adding a hypochlorite aqueous solution to the 2-naphthol alkali solution at 5-30 DEG C, and then increasing the temperature to 50-60 DEG C to react, so that 2-naphthol is oxidized to an intermediate isomerization and rearrangement to generate 2-hydroxy-1,4-naphthoquinone salt, and a 2-hydroxy-1,4-naphthoquinone salt solution is obtained; S3: adjusting the pH of the 2-hydroxy-1,4-naphthoquinone salt solution, so that the 2-hydroxy-1,4-naphthoquinone salt is converted into 2-hydroxy-1,4-naphthoquinone and precipitated, and a 2-hydroxy-1,4-naphthoquinone crude product is obtained. The method uses 2-naphthol as a raw material, and high-purity and high-yield 2-hydroxy-1,4-naphthoquinone is obtained, while the safety hazards and environmental burdens caused by the use of a large amount of peroxide oxidants and metal catalysts are avoided, the process flow is simplified, and the method is more suitable for industrialization.

This invention provides a compound for recognizing chiral amino alcohols, a fluorescent probe, its preparation method, and its application. Naphthol and sodium hydride are weighed and dissolved separately in ultra-dry tetrahydrofuran, mixed, and then reacted with bromomethyl methyl ether. The mixture is extracted with ethyl acetate, and the organic phases are combined to obtain product (R)-1. This product is dissolved in ultra-dry tetrahydrofuran, and n-butyllithium is added. The reaction system changes from colorless to brown, and the reaction is allowed to return to room temperature. Ultra-dry N,N-dimethylformamide solution is then added, and the reaction is quenched by adding saturated ammonium chloride solution under ice-water bath conditions. The product is then extracted with ethyl acetate to obtain product (R)-2. Product (R)-2 is dissolved in a mixed solvent of tetrahydrofuran and anhydrous methanol, and sodium triacetoxyborohydride is added. The product is then extracted with ethyl acetate to obtain reduced product (R)-3. Product (R)-3 is dissolved in a mixed solvent of dichloromethane and anhydrous ethanol, and concentrated hydrochloric acid is added. After the reaction is complete, the reaction is quenched with sodium bicarbonate, and then extracted with dichloromethane to finally obtain compound (R)-4, which recognizes chiral amino alcohols.

The invention discloses a high-temperature-resistant maintenance-free lead-acid storage battery for starting. The lead-acid storage battery comprises a positive plate, a negative plate, a partition plate, electrolyte and a storage battery tank, the positive plate comprises a positive grid filled with positive lead plaster; the negative plate comprises a negative plate grid filled with negative lead plaster; the negative electrode lead paste is prepared by curing lead powder, a condensation polymer of beta-naphthol sulfonic acid and formaldehyde, lignin, barium sulfate, acetylene black, short fibers, a sulfuric acid aqueous solution and deionized water according to a ratio. The condensation polymer of beta-naphthol sulfonic acid and formaldehyde added in the negative electrode lead paste has low solubility in an electrolyte and strong oxidation resistance, reduces the volume of lead sulfate crystals generated by discharge, increases the porosity of a negative electrode active substance, inhibits the formation of large-particle metal lead in the charging process, delays the shrinkage of the negative electrode active substance, and improves the charging efficiency. Meanwhile, the hydrogen evolution overpotential is improved, and the water loss of the storage battery is inhibited.

The invention belongs to the field of pharmaceutical chemistry preparation, discloses a preparation method of 6-amidino-2-naphthols and its intermediate M1, and prepares nafamostat mesylate using the method. The preparation method provided by the present invention is: using SM1 as starting material, and obtaining intermediate M1 by hydroxylamine addition, M1 is reduced to obtain 6-amidino-2-naphthols M2 by means of continuous reaction or stepwise reaction, condensed under the action of a condensing agent, and then methanesulfonic acid salifies to obtain nafamostat mesylate. The preparation method of the present invention has short reaction time, high yield, high product purity, mild reaction conditions, simple post-processing, avoids the dangerous reaction, dangerous reagent, controlled reagent involved in traditional route, therefore the safety of operation and product is higher, is conducive to industrialized large-scale production.

The application provides a nematocide of a light-loving flower extract and a preparation method and application thereof, and particularly relates to application of the light-loving flower extract in preparation of a nematocide. Through determination of a mortality rate and a hatching rate of southern root-knot nematodes, it is found that ethyl naphthalene in the light-loving flower has good insecticidal activity on nematodes and has obvious inhibition on hatching of eggs of the southern root-knot nematodes. The nematocidal activity of ethyl naphthalene increases with increase of a concentration of the medicine, and the inhibition rate on hatching of the nematode eggs increases with increase of a treatment time and the concentration of the medicine.

This invention belongs to the field of organic chemical synthesis, specifically relating to a 3-amino-2-indolone compound containing a thioacetal skeleton, its synthesis method, and its applications. The synthesis method involves adding aryl-substituted dithioacetal and 1-substituted-3-imino-2-indolone as reactants to an organic solvent. The reaction is carried out under the synergistic catalysis of naphthol phosphate and a Cu metal catalyst at 2-5°C with stirring. The reaction is monitored by TLC until complete, followed by filtration, concentration, and purification to obtain the final product. The 3-amino-2-indolone compound synthesized in this invention possesses potential pharmaceutical activity due to its thioacetal skeleton. The reaction conditions of this invention are relatively conventional, the reaction process is mild, simple, and low-cost, suitable for large-scale industrial production, thus broadening the applicability of this method. A wide variety of substrates are used as reactants, resulting in structurally diverse products with high yields.

The invention relates to a method for preparing a hydroxyl naphthaldehyde derivative by using a cobalt complex, which comprises the following step: by taking naphthol and paraformaldehyde as raw materials and the cobalt complex containing an ortho-carborane benzothiazole structure as a catalyst, reacting at room temperature to synthesize the hydroxyl naphthaldehyde derivative. Compared with the prior art, the cobalt complex containing the ortho-carborane benzothiazole structure is applied to the reaction for catalytically synthesizing the hydroxyl naphthaldehyde derivative through the one-pot method, the use equivalent of the catalyst is low, the reaction condition is mild, the substrate universality is high, and the yield is high.

The embodiment of the invention discloses a preparation method of 2, 2 '-di-(2-hydroxyethoxy)-1, 1'-dinaphthalene, which comprises the following step: (+ / -)-1, 1 '-di-(2-naphthol) shown in a formula I and ethylene carbonate react in the presence of a catalyst, a solvent and a preset temperature to obtain a 2, 2'-di-(2-hydroxyethoxy)-1, 1 '-dinaphthalene product shown in a formula II. According to the preparation method of 2, 2 '-di-(2-hydroxyethoxy)-1, 1'-dinaphthalene, (+ / -)-1, 1 '-di-(2-naphthol) is taken as a starting raw material, a high-yield target product is obtained through alkylation reaction, the raw material is convenient and easy to obtain, the reaction route is short, the reaction condition is mild, and a high-purity product can be obtained through simple purification.

The present invention relates to the technical field of olefin polymerization catalysts and discloses a tetrahydronaphthol-phosphine pre-transition metal complex, a method for preparing the same, and its use. The structural formula of the tetrahydronaphthol-phosphine pre-transition metal complex is given by formula (I) (wherein M is selected from group 4 metals, Ar is selected from substituted or unsubstituted C6-C20 aryl groups, X is selected from halogens or C1-C10 hydrocarbon groups, and n is 1 or 2). When the tetrahydronaphthol-phosphine pre-transition metal complex of the present invention is used as the main catalyst for olefin polymerization, the olefin polymerization activity (homopolymerization / copolymerization activity) is relatively good even at relatively high temperatures, and the prepared olefin polymer has relatively good performance. [Formula 1] JPEG2026513594000017.jpg31169

The invention discloses a chiral binaphthol-based fluorescent material as well as a preparation method and application thereof, and belongs to the technical field of organic photoelectric materials. The fluorescent material takes a chiral binaphthyl derivative as a skeleton, and a chiral binaphthyl group is introduced into a para-position position of tetrafluoroterephthalonitrile, so that a chiral space charge transfer luminescence system with a clear structure is formed. The preparation method comprises two steps of nucleophilic substitution reaction, the reaction condition is mild, the synthetic route is simple, and the yield is stable. The material has dual-state emission and aggregation enhanced luminescence characteristics, avoids aggregation quenching, has excellent circular polarization luminescence performance, has a luminescence asymmetry factor (Glum) of 3.6 * 10 <-3 >-5.9 * 10 <-3 >, and can still maintain stable chiral luminescence characteristics in a doped film. The material can be widely applied to the fields of commercial anti-counterfeiting, fluorescent ink, circular polarization luminescent devices, 3D display, information encryption, biological probes, LED light sources and the like, and has good industrial amplification potential and practical application value.

This invention discloses a phosphonothiolated binaphthol derivative and its synthetic method. Using readily available binaphthioonium salts as starting materials, secondary phosphine oxides as coupling agents, and a base as a promoter, a series of phosphonothiolated binaphthol derivatives are generated. This invention features simple raw material preparation, very mild synthetic reaction conditions, convenient experimental operation, high reaction efficiency, and diverse functional groups.

Bis-phosphites with naphthol flanking structural units and their use in hydroformylation.

The present invention relates to a process for the preparation of solid-state forms of (6R)- 6-(2-(N-(4-(2-(ethylamino)ethyl)benzyl)-N-ethylamino)-4-methoxyphenyl) 5,6,7,8- tetrahydr -onaphthalen-2-ol dihydrochloride (1). Formula (1) Elacestrant dlhydrochloride (1)

A curing agent composition, comprising a) 10-60 wt. %of a Mannich base, or / and an epoxy adduct, b) 20-70wt. %of a polyamide curing agent based on a polyamine and a multifunctional fatty acid; and c) 10-30 wt. %of 1-naphthol, or / and 2-naphthol; and optionally an accelerator and optionally an organic solvent. An amine-epoxy composition, a cured product produced from the amine-epoxy composition, an article of manufacture, use of the curing agent composition as a hardener for an epoxy resin, and use of the curing agent composition to prepare a curing agent of an epoxy resin are also provided.

The application discloses a method and system for determining the content of calcium and magnesium in a zinc solution electrolyzed by a chlorine-ammonia method, and the method comprises the following steps: in a solution with PH equal to 10, taking sodium potassium tartrate and triethanolamine as masking agents, taking acid chrome blue K-naphthol green B as an indicator, titrating with EDTA until the solution is pure blue, and determining the total content of calcium and magnesium; in a strong alkaline solution with PH equal to or greater than 12, taking triethanolamine as a masking agent, taking a calcium indicator as an indicator, titrating with EDTA until the solution is pure blue, and determining the content of calcium. The method can accurately determine the content of calcium and magnesium in the zinc solution electrolyzed by the chlorine-ammonia method, is used for guiding the formula of a production raw material, and can timely remove calcium and magnesium in the solution, so that the production is not seriously affected.

According to the method, when the concentration of sodium sulfate decahydrate and sodium sulfite heptahydrate in wastewater is nearly saturated, pure sodium sulfate hydrate mixed salt can be separated out by water cooling at the temperature of 10-25 DEG C, so that pure sodium sulfate and sodium sulfite hydrate mixed salt crystals are obtained; organic matters adsorbed on the surface of the hydrate mixed salt are eluted and decolored in a manner of washing with dilute alkali liquor, and the sodium sulfate hydrate mixed salt subjected to alkali washing and decoloring completely meets the technical index requirements for preparing anhydrous sodium sulfite / sodium pyrosulfite; according to the method, naphthalene sulfonic acid organic matters are separated from alpha / beta naphthalene sulfonate, sulfone and other organic matters (TOC) contained in wastewater through heat preservation and filtration by utilizing the characteristic that the solubility of the organic matters in nearly saturated saline water is extremely low; therefore, after the organic wastewater containing sodium sulfate, sodium sulfite and other salts can be repeatedly evaporated and concentrated to be nearly saturated, pure and decolored sodium sulfate hydrate mixed salt and low-salt naphthalene sulfonic acid organic matters are separated from the wastewater by adopting the modes of insulating and filtering to remove organic matters, water-cooling to separate out salt and alkali washing; after the process scheme is industrially implemented, the naphthol wastewater treatment can avoid the traditional treatment method for removing organic matters by resin adsorption or extraction, and sodium sulfate mixed salts and naphthalene sulfonic acid organic matters in the wastewater are directly purified, so that the wastewater treatment cost and investment are greatly reduced; according to the process route, the bottleneck problem of high treatment cost of the naphthol wastewater is solved, and resource recycling of the wastewater and the waste salt is realized.

The present invention relates to a polyalkylene carbonate / graft copolymer resin composition having improved elongation properties and surface properties, and a molded article containing the same. The resin composition includes a polyalkylene carbonate resin containing end-capping moieties and a graft copolymer, wherein the end-capping moieties are units derived from one or more selected from maleic anhydride, 4-t-octylphenol, 2-naphthol, 4-n-butoxyphenol, 4-phenylphenol, 4-(benzyloxy)phenol, and 4-t-butylphenol, and the molded article containing the same is provided.

The invention provides a preparation method of an optically active acrylate adhesive, a'powder 'falling prevention thermal insulation aerogel slurry and a preparation method of an aerogel composite product. The preparation method of the optically active acrylate adhesive comprises the following steps: 1) mixing S-binaphthol and triethylamine which are dissolved in an organic solvent, then adding methacryloyl chloride, stirring, and taking an organic phase as a first monomer; taking acrylate as a second monomer; and 2) mixing the emulsion with a first monomer, a second monomer and an initiator, reacting, cooling to obtain an emulsion, adding water to adjust the solid content of the emulsion, and removing the organic solvent through reduced pressure distillation to obtain the optical acrylate adhesive. The optical rotation acrylate adhesive with both infrared radiation blocking capability and bonding capability is prepared and mixed with the silicon dioxide aerogel powder, the opacifying agent and the like to prepare the aerogel slurry with the infrared radiation blocking function, and the aerogel composite product obtained after the aerogel slurry is compounded with the base material has excellent heat insulation performance and does not fall off powder.

The application provides an aromatic proton exchange membrane with a regional double sulfonic acid side chain structure and a preparation method thereof, and belongs to the technical field of proton exchange membranes. Triphenyl, 2,2,2-trifluoroacetophenone and 2,3,4,5,6-pentafluorobenzaldehyde are selected as monomers, an aromatic polymer is obtained through a super acid polymerization method, then 2-naphthol-6,8-disulfonic acid dipotassium hydrate is added, and a double solvent method is used to successfully realize the positioning controllable sulfonation of the side chain phenyl of the polymer. The main chain of the polymer is an ether-free aromatic skeleton, which guarantees good chemical stability from the source; the flexible regional double sulfonic acid side chain is beneficial to the induction of the formation of a continuous proton transmission channel, so that excellent proton conductivity is realized; meanwhile, due to the phenyl stacking effect of the naphthyl structure of the side chain, the proton membrane has excellent dimensional stability; the application gives a solution to the contradiction that the general aromatic proton exchange membrane is difficult to be compatible with the proton conductivity and the dimensional stability.

The method comprises the following steps: taking diazonaphthol sulfonyl chloride and a phenolic hydroxyl compound as raw materials, taking aminated polystyrene porous microspheres as an acid-binding agent, and carrying out heat preservation reaction in a polar solvent to obtain a first product; 2, filtering the first product obtained in the step 1, and recovering to obtain aminated polystyrene porous microsphere hydrochloride; carrying out post-treatment on the aminated polystyrene porous microsphere hydrochloride in the step 2 to obtain a crude product diazo naphthoquinone sulfonate; and 3, pulping and washing the crude product diazonaphthoquinone sulfonate in the step 3 with a solvent, filtering, and drying to obtain the product diazonaphthoquinone sulfonate. The synthesis method disclosed by the invention is simple to operate, low in cost, very suitable for industrialization and capable of being widely popularized and used.

The invention relates to the technical field of polyurethane elastomers, and discloses a high-temperature-resistant polyurethane elastomer material and a preparation process thereof, 2, 4, 6-tri-(nitronaphthalene-phenyl)-[1, 3, 5] triazine obtained by reaction of 2, 4, 6-tri-(4-bromophenyl)-[1, 3, 5] triazine and 4-nitro-1-naphthol has excellent heat resistance; the aromatic naphthalene ring structure has a rigid structure, the molecular chain of the aromatic naphthalene ring structure is highly regular, and the polyurethane elastomer synthesized by the aromatic naphthalene ring structure has excellent dynamic performance; 2, 4, 6-tri-(aminonaphthalene-phenyl)-[1, 3, 5] triazine after reduction is utilized to prepare a chain extender containing diamine, and the chain extender and isocyanate generate carbamido, so that the tensile strength of the polyurethane elastomer is improved; through the synergistic effect of triazine, naphthalene ring and hydrogen bond, the prepared polyurethane elastomer is excellent in mechanical property and obvious in high temperature resistance advantage.

The invention discloses a preparation method of a medical intermediate 6-methoxy-1-tetralone, which comprises the following steps: S1, carrying out hydrogenation reduction on 2-naphthol under the action of a catalyst and a promoter to prepare 5, 6, 7, 8-tetrahydro-2-naphthol; s2, 5, 6, 7, 8-tetrahydro-2-naphthol and an oxidizing agent X are subjected to a reaction, and 6-hydroxy-3, 4-dihydronaphthalene-1-one is prepared; s3, enabling the 6-hydroxyl-3, 4-dihydronaphthalene-1-ketone to react with a methylation reagent in an alkaline environment, so as to prepare 6-methoxyl-1-tetralone, and enabling the 6-hydroxyl-3, 4-dihydronaphthalene-1-ketone to react with a methylation reagent in an alkaline environment; wherein the oxidizing agent X comprises at least one of oxygen, hydrogen peroxide, tert-butyl hydroperoxide, potassium permanganate, tetrabutylammonium perchlorate, pyridine chlorochromate, 2, 3-dichloro-5, 6-dicyanobenzoquinone, chromium trioxide, ceric ammonium nitrate, potassium persulfate, 1, 4-benzoquinone and chloranil; the feeding molar ratio of the oxidizing agent X to the 5, 6, 7, 8-tetrahydro-2-naphthol is (1.0 to 2.5): 1.0. The method has the advantages of mild reaction conditions, high molar total yield, high purity, low cost and toxicity of raw materials, less discharge of three wastes, and clean process, and is suitable for industrial production.

The invention discloses a method for recovering R-binaphthol phosphate, and relates to the technical field of pharmaceutical chemicals, and the method comprises the following steps: carrying out acidification crystallization treatment on a solution containing R-binaphthol phosphate, and filtering to obtain an R-binaphthol phosphate wet material; and carrying out reflux water separation on the obtained R-binaphthol phosphate wet material in an organic solvent A, filtering, removing impurities, and drying to obtain the R-binaphthol phosphate. The recovered R-binaphthol phosphoric acid can be continuously used in a bedaquiline resolution process and can be continuously recovered and reused, the method can efficiently produce bedaquiline fumarate, material waste is avoided, the cost is saved, and the method is suitable for industrial large-scale production.

The invention discloses phenolic resin as well as a preparation method and application thereof, and belongs to the field of macromolecules. Aiming at the problems that existing phenolic resin is poor in heat resistance and limited in application, the preparation method of the phenolic resin comprises the steps that raw material pretreatment is conducted, specifically, naphthol, biphenyl dimethyl ether and p-benzene dimethyl ether are mixed and heated to be molten at the first preset temperature, and a molten liquid mixture is obtained; carrying out synthesis reaction: putting the liquid mixture under an acidic condition, and carrying out synthesis reaction at a second preset temperature to obtain a resin monomer; and obtaining a finished product: removing unreacted naphthol from the resin monomer to obtain the finished phenolic resin. The naphthol is simultaneously mixed with two dimethyl ethers which are similar in structure but different in property to prepare the resin which is good in heat resistance, high in flame retardance and low in moisture absorption; the raw materials are heated and melted, so that subsequent mixing with a catalyst is facilitated, and sufficient reaction is ensured; and finally, the application range of the phenolic resin is expanded.

The invention belongs to the technical field of electronic materials, and particularly relates to a preparation method of a wave-absorbing electromagnetic shielding film for a 6G electronic device. The preparation method comprises the following steps: doping naphthol blue black containing multi-polar functional groups and a nano-copper powder sol solution into epoxy resin glue, and heating and curing to form the film. The minimum wave absorbing efficiency of the electromagnetic shielding film with the thickness of 1 mm within the range of 0.3-3.0 THz is-30.56 dB, the average wave absorbing efficiency is-17.82 dB, and the effective bandwidth of the electromagnetic shielding film with the wave absorbing efficiency smaller than or equal to-10 dB is 0.64-3.00 THz. Meanwhile, the highest electromagnetic shielding effectiveness of the electromagnetic shielding film is 50.73 dB, and the average shielding effectiveness of the electromagnetic shielding film is 37.79 dB; the electromagnetic shielding film can be used for wave-absorbing electromagnetic protection of 6G electronic devices.

The invention discloses a high-surface-density back adhesive film, a back adhesive film product and application. The high-surface-density back adhesive film is prepared from phenoxy resin, epoxy resin, an amino silane coupling agent, amino silane coupling agent modified silicon dioxide, a naphthol curing agent and a coloring agent. The epoxy resin further comprises polyurethane modified bisphenol A type epoxy resin, bisphenol A type epoxy resin and bisphenol F type epoxy resin; wherein the components comprise 18-22 parts by mass of phenoxy resin, 48-54 parts by mass of amino silane coupling agent modified silicon dioxide, 8-10 parts by mass of polyurethane modified bisphenol A type epoxy resin, 10-12 parts by mass of bisphenol A type epoxy resin, 5-8 parts by mass of bisphenol F type epoxy resin, 7-9 parts by mass of a naphthol curing agent and 1-2 parts by mass of a coloring agent. The high-surface-density back adhesive film can directly cover the back surface of the chip to serve as a chip protection layer. The high-surface-density back adhesive film has excellent mechanical strength and reliability, and the stability of a chip packaging structure can be improved when the high-surface-density back adhesive film is applied to chip packaging.