75 results about "Benzophenone" patented technology

The invention discloses a synthetic method of a water soluble ultraviolet light absorber BP-9. The method mainly comprises the following process steps: (1) carrying out methylation on the main raw materials of 2, 2', 4, 4'-tetrahydroxyl benzophenone, a transition metal salt catalyst and a mixed solvent which is prepared from dichloroethane and anhydrous ethanol in equal parts by weight to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone; (2) carrying out sulfonation reaction on the main raw materials of methylate, sulfamic acid and C1-C3 halohydrocarbon to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone-5, 5'-disulfonic acid; and (3) carrying out neutral reaction on the main raw materials of sulfonated product, inorganic base and ethanol water to finally obtain the BP-9 product. The synthetic method disclosed by the invention is few in reaction step, low in cost, high in product purity and stable in quality, and raw materials are easily available.

The present invention provides a polyimide film and a method for manufacturing the polyimide film, wherein the polyamic acid solution is obtained by imidizing a dianhydric acid component comprising two or more selected from the group consisting of benzophenone tetracarboxylic dianhydride (BTDA), biphenyltetracarboxylic dianhydride (BPDA), and pyromellitic dianhydride (PMDA), and a diamine component comprising paraphenylene diamine (PPD), wherein, based on a total content of 100 mol% of the diamine component, the content of paraphenylene diamine is 70 mol% or more and 100 mol% or less, and based on a total content of 100 mol% of the dianhydric acid component, the content of biphenyltetracarboxylic dianhydride is 50 mol% or more and less than 100 mol%, the dielectric loss rate (Df) is 0.003 or less, and the light transmittance at a wavelength of 550 nm is 15% or more and 50% or less.

The application discloses an environmentally-friendly soft type yoga mat special silk-screen printing ink and a preparation method thereof, and belongs to the technical field of silk-screen printing inks. The ink comprises the following components in parts by weight: 30-50 parts of main body resin, 5-15 parts of environmentally-friendly pigment, 25-45 parts of environmentally-friendly composite solvent, 1-5 parts of adhesion promoter, 0.5-2 parts of rheological additive, 0.5-2 parts of scratch-resistant additive, and 2-8 parts of environmentally-friendly non-ortho phenyl plasticizer. The ink is extremely environmentally-friendly, meets international export standards, and is free of phthalate plasticizers, benzophenone solvents and heavy metal pigments in the whole process. Instead, the ink uses citric acid ester non-ortho phenyl plasticizers, benzene-free and ketone-free composite solvents and heavy metal-free organic pigments. The VOC content is far lower than the national limit value, the irritating odor is eliminated, and phthalate controlled substances are not detected. The ink meets the EU REACH regulation appendix XVII 51 / 52 and the EN71-3 toy safety standard, and completely solves the problem of limited export of traditional inks.

The invention discloses a method for preparing a chiral benzhydrol compound through asymmetric hydrogenation of o-amido benzophenone under catalysis of rhodium. The chiral rhodium catalyst is generated in situ from a metal rhodium salt and a chiral phosphine-phosphoramidite ligand in various solvents. Compared with other methods for synthesizing chiral benzhydrol, the method has the characteristics of cheap catalyst, easiness in preparation of chiral ligand, mild reaction conditions, simplicity and convenience in operation, high yield, high enantioselectivity and the like, and can be applied to large-scale preparation of chiral benzhydrol compounds. The method is also suitable for efficient preparation of the rice plant growth regulation inhibitor (S)-Inabenide, the yield can reach 92%, the enantioselectivity can reach 96%, and the method has good industrial application prospects.

This invention discloses a flame-retardant and anti-aging cable composite material and its preparation method, belonging to the field of cable material preparation technology. In this invention, a flame-retardant, high-temperature resistant polysiloxane containing double bonds, an anti-aging agent, and a flame-retardant filler are prepared and blended with raw materials such as EVA and low-density polyethylene. Irradiation causes cross-linking between the materials, endowing the composite material with heat resistance, aging resistance, and good mechanical properties. The anti-aging agent of this invention includes siloxane groups and benzophenone groups, possessing good resistance to both UV aging and heat aging, which is beneficial for further improving the anti-aging performance of the prepared cable composite material. The flame-retardant filler of this invention has urethane bonds grafted onto its surface, which matches the polarity of the EVA vinyl acetate segments, improving the compatibility between the flame-retardant filler and EVA, and further enhancing the flame retardancy of the prepared composite cable material.

This invention relates to the field of composite materials, specifically to a high-strength, high-temperature resistant composite material for parts and its preparation method. It addresses the problems of poor high-temperature resistance and insufficient mechanical properties in existing composite materials. This composite material incorporates fluorobiphenyl-naphthylfuranyl polyaryletherketone, multi-walled carbon nanotubes, and polyetheretherketone. The preparation of fluorobiphenyl-naphthylfuranyl polyaryletherketone involves first synthesizing bis(trifluoromethyl)-biphenyl-dibromonaphthalene and reacting it with 5-formaldehyde-furan-2-boric acid to obtain dialdehyde-furanylnaphthalene-bis(trifluoromethyl)biphenyl. The aldehyde group then reacts with 4-aminophenol to obtain dihydroxyfuranylnaphthalene-bis(trifluoromethyl)biphenyl, which is then polymerized with 4,4'-difluorobenzophenone to obtain fluorobiphenyl-naphthylfuranyl polyaryletherketone. The rigid structure reduces chain segment movement, improves tensile strength and modulus, and enhances the polymer's high-temperature resistance, thereby improving the overall durability and reliability of the material.

A sulfur-containing aromatic acrylate compound, its preparation method, and its applications are disclosed. The compound has a structure as shown in general formula (A), which integrates acrylate, benzophenone, and thioether functional groups in its molecular structure, adapting to the application requirements of various optical material raw materials. This invention also provides an efficient preparation process for this compound. Optical materials prepared using this compound as a monomer exhibit excellent aging resistance and anti-yellowing properties, as well as outstanding mechanical properties. Wherein, R1=CH2=CH-COO; R2=CH3; n=2 or 3, m=0, 1, or 2.

This invention belongs to the field of photoinitiator technology, and provides a benzophenone-based compound, its preparation method, and its applications. The invention introduces a piperazine group, substituted at the N-site by a methyl, ethyl, or propyl group into one phenyl group of benzophenone, which can improve the basicity of the piperazine group, enhance its hydrogen donor capacity, and increase the photocuring speed. A dialkyl secondary amine is introduced into the phenyl group on the other side of benzophenone. Utilizing its flexible structure, this ensures good diffusion of free radical fragments generated by the photolysis of the benzophenone-based compound, avoiding the hindering of molecular motion due to the introduction of a large, rigid substituted piperazine group, thus improving the photoinitiation efficiency and photocuring speed of the benzophenone-based compound. The alkyl group in the dialkyl secondary amine is independently ethyl, propyl, or butyl, which can reduce the polarity of the benzophenone-based compound, making it a high-viscosity liquid at room temperature, with good solubility in resin monomers and good compatibility with polymer networks after photocuring.

Provided is a method for preparing lactide by one-step reaction of lactic acid, which comprises mixing lactic acid raw material with a solvent and contacting with a catalyst, wherein the solvent comprises solvent I and solvent II, the solvent I is at least one selected from polar solvents such as benzophenone, dihydrolevoglucosenone, N-methylpyrrolidone, trichloropropane and sulfolane, the solvent II is C4-C12 alkane, substituted alkane, aromatic hydrocarbon or substituted aromatic hydrocarbon, the solubility of the solvent II for lactic acid at normal temperature is not more than 1 g lactic acid / 100 g solvent; and the reaction temperature and pressure are such that the solvent I does not boil in the reaction system. The mixed solvent is used as the liquid environment for preparing lactide by one-step reaction of lactic acid, the mixed solvent can be completely miscible with lactic acid in the reaction raw material, on the one hand, it can increase the contact between lactic acid and the solid catalyst, make the reaction more complete, reduce the generation of by-product poly lactic acid, and increase the selectivity of lactide; on the other hand, since the poly lactic acid can also be dissolved in the selected solvent, the adhesion of the poly lactic acid on the catalyst can be reduced, the influence of catalyst deactivation caused by carbon deposition can be reduced, and the service life of the catalyst can be improved.

The application discloses a force-ultraviolet-X ray three-mode excited doped organic room-temperature phosphorescent material and a preparation method and application thereof. The doped organic room-temperature phosphorescent material comprises a guest compound and a host compound, and the host compound comprises halogenated benzophenone or unsubstituted benzophenone. The doped organic room-temperature phosphorescent material provided by the application can generate stable phosphorescent emission under external force stimulation, ultraviolet light and X ray excitation. Moreover, the preparation method is simple, the cost is low, the excitation mode is various, and the doped organic room-temperature phosphorescent material can emit light in the condition of no light source. The doped organic room-temperature phosphorescent material provided by the application adopts pure organic material, is not doped with metal, the structure is convenient to modify, is more green and economical, and is more in line with the development trend of green chemistry. The material can be used in the field of force-induced light emission and can be applied to the field of X ray imaging.

This invention discloses a dimerized triarylmethane compound for blue photoresist color paste and its synthesis method. The compound is a dimerized blue triarylmethane compound A, which is prepared by the following steps: (1) reacting reactant B with diacid chloride as an acylation reagent to obtain intermediate C; (2) removing the Boc group from intermediate C to obtain intermediate D; (3) cyclizing intermediate D with potassium thiocyanate and acyl chloride reagent to obtain intermediate E; (4) reacting intermediate E with 4,4-bis(diethylamino)benzophenone to obtain F; (5) salting intermediate F to obtain the target dimerized triarylmethane compound A. The dimerized triarylmethane compound of this invention has excellent color performance and is suitable for blue photoresist color paste. It can significantly improve the brightness, transparency, contrast and dispersibility of the color paste, while also possessing high hiding power, strong tinting strength and good thermal and light stability.

This invention discloses a method for preparing a series of bismaleimide products, relating to the field of high-performance thermosetting resin monomer synthesis technology. The method includes a pre-reaction of maleic anhydride and aromatic diamine at a molar ratio of 2.0–2.2:1 under nitrogen protection at 60–90°C. The resulting amic acid intermediate is pumped into a twin-screw extruder. Irradiation is performed in the vacuum dehydration ring-closing zone (or imidization zone) using a 365 nm UV LED array, coupled with a 0.3–1.0 wt% benzophenone / triethanolamine photoinitiator system. The ring-closing reaction is completed at 110±5°C and a vacuum of -0.090 to -0.098 MPa, with a total residence time of 30–90 seconds, yielding bismaleimide products with an acid value ≤0.1 mg KOH / g and a ring closure degree ≥98.5%. Rapid product switching for a series of products can be achieved by changing different aromatic diamines. This invention eliminates the use of organic solvents, reduces energy consumption by more than 55%, and has a batch-to-batch acid value variation coefficient of less than 2%, meeting the requirements of electronic-grade packaging materials. Furthermore, the process conditions are fundamentally different from existing technologies, demonstrating significant technological advancements.

This invention relates to the field of high-performance thermoplastic composite materials, and in particular to a method for preparing polyaryletherketone resin. The method includes the following steps: under a non-oxidizing atmosphere, a dihydroxy aromatic monomer containing a bisphenol structure, a dihalogenated aromatic monomer containing a nitrile group, and a dihalogenated aromatic ketone monomer containing a difluorine substituted group are reacted in a polar solvent system with a boiling point above 150°C in the presence of an alkali metal carbonate to form the corresponding phenolate; an aromatic hydrocarbon dehydrating agent is added to the system for azeotropic dehydration to remove water generated during the reaction and promote the formation of the phenolate; a nucleophilic substitution polycondensation reaction is carried out at a higher temperature; during the polycondensation reaction, a capping agent is added to regulate the end-chain structure and molecular weight distribution, wherein the capping agent is 2,4′-difluorobenzophenone; after the reaction is completed, the reaction product is separated and purified to obtain the polyaryletherketone resin.

This invention relates to the field of automotive exhaust pipe coating preparation technology, specifically disclosing a surface coating agent for automotive exhaust pipe gaskets and its preparation method. The preparation method involves adding acetone, polyvinyl alcohol, and benzophenone tetracarboxylic dianhydride to a reaction vessel in a specific ratio for esterification to obtain an ester solution. Alkali solution and epoxy resin are then added to the ester solution and reacted for 2-4 hours to obtain a water-based epoxy emulsifier. The water-based epoxy emulsifier and epoxy resin are then reacted under preset conditions to obtain a water-based epoxy resin emulsion. The water-based epoxy resin emulsion, filler, dispersant, and thickener are then added to the reaction vessel and mixed thoroughly. A stabilizer and defoamer are added and mixed again to obtain the surface coating agent for automotive exhaust pipe gaskets. Compared with existing technologies, the surface coating agent obtained by this invention, together with the curing agent, improves coating adhesion while preventing the formation of pores and pinholes in the obtained coating structure, enhancing the coating's corrosion resistance and density, thereby improving the gasket's acid and water resistance.

This invention discloses polyimide, its preparation method, and polyester electronic adhesive. This invention provides a polyimide whose polymerizing monomers include dianhydride monomers and diamine monomers, wherein the dianhydride monomer is selected from one or more of 4,4'-(4,4'-isopropyldiphenoxy)bis(phthalic anhydride), 3,3',4,4'-benzophenone tetracarboxylic dianhydride, 4,4'-oxybis(phthalic anhydride), and 2,3,3',4'-biphenyltetracarboxylic dianhydride; and the diamine monomer is selected from one or more of aminophenyl sulfone, 1,3-bis(4'-aminophenoxy)benzene, 2,2'-bis[4-(4-aminophenoxyphenyl)]propane, 4,4'-bis(3-aminophenoxy)diphenyl sulfone, 1,3-cyclohexanedimethylamine, 4,4'-diaminodiphenyl ether, dimericadiamine, and trimericadiamine. The polyimide of this invention can modify polyester or epoxy systems, significantly improving flame retardancy and adhesive peel strength. The coating process involves evaporation at relatively low temperatures, and the solvent in the system has a low boiling point, meeting the requirements of existing processes.

The present application relates to the technical field of chemical synthesis, and particularly relates to a preparation method of 4,4'-difluorobenzophenone and a method for synthesizing polyether ether ketone by two steps of carbon tetrachloride. The preparation method of 4,4'-difluorobenzophenone comprises the following steps: under the condition that trifluoromethanesulfonic acid and N-methyl pyrrolidone exist, CCl4 and fluorobenzene are reacted, and the product is hydrolyzed to obtain 4,4'-difluorobenzophenone. The present application solves the problems of high cost, poor environmental protection and performance that cannot meet market requirements of PEEK by innovating raw material route, catalytic system and process parameters, realizes low-cost, green and high-performance synthesis of PEEK, the purity of the prepared DFBP monomer can reach >=99.99%, and the PEEK molecular weight distribution (PDI<=1.9) can be narrowed, and the method is suitable for industrialized production of PEEK materials used in high-end fields such as aerospace, medical devices and electronic and electrical appliances.

The application discloses a kind of reinforced toughened impact resistant wear-resistant anticorrosion integrated coating material and preparation method thereof, it is related to high polymer composite material and functional coating technical field, method includes: providing hexafluorocyclotriphosphazene and vanillin, mixing, carries out first reaction, obtains first reactant;Providing 4,4'-diamino diphenyl ether and 3,3',4,4'-benzophenone tetracarboxylic dianhydride, mixing, carries out second reaction, obtains second reactant;Providing hydroxyl-terminated polydimethylsiloxane and 4,4'-diphenyl methane diisocyanate, with second reactant is mixed, carries out third reaction, obtains third reactant;Providing iron salt, with first reactant and third reactant are mixed, carries out solidification treatment, obtains coating material;The reinforced toughened impact resistant wear-resistant anticorrosion integrated coating material obtained will be integrated in single layer coating with the functions such as reinforcement, toughening, impact resistance, wear resistance, corrosion resistance, etc., with excellent wear resistance and anticorrosion performance and intrinsic flame-retardant radiation resistance characteristics.

The application belongs to the technical field of organic synthesis, and particularly relates to a preparation method of maropintan and an intermediate thereof. The preparation method comprises the following steps: S1: 3-quinuclidinone or a salt thereof is reacted with benzophenone under the condition of a base, a first solvent, to obtain 2-(diphenyl methylene) quinuclidin-3-one; S2: the obtained 2-(diphenyl methylene) quinuclidin-3-one is reacted with an amine source and hydrogen under the condition of a chiral ruthenium catalyst, an optional additive and a second solvent, to obtain an intermediate (2S, 3S)-2-diphenyl methyl quinuclidin-3-amine; and S3: the obtained (2S, 3S)-2-diphenyl methyl quinuclidin-3-amine is subjected to a condensation reaction with 5-tert-butyl-2-methoxy benzaldehyde (formula V) in the presence of an acid and a third solvent, and is reduced by palladium carbon or platinum carbon and hydrogen to obtain maropintan. The method has the advantages of low-cost and easily-available raw materials, a short synthesis route, high-yield one-step reaction of double chiral centers, good selectivity, simple process, high product yield and low cost.

A kind of microporous sulfonated poly (ether ether ketone) membrane for reverse electrodialysis energy conversion, preparation method and application thereof belong to ion exchange membrane technical field. First, bisphenol fluorene, 4,4'-difluorobenzophenone, alkaline catalyst and water-removing agent are added into solvent to carry out nucleophilic polycondensation reaction to obtain poly (ether ether ketone) ;Second, it is dissolved in anhydrous dichloromethane, and chlorosulfonic acid / dichloromethane solution is added to carry out sulfonation reaction to obtain sulfonated poly (ether ether ketone) with different sulfonation degrees;Finally, it is dissolved and formed into film by solution casting method, the main chain is the copolymer of bisphenol fluorene and 4,4'-difluorobenzophenone, and the main chain contains rigid fluorenyl structural unit.The rigid fluorenyl structural unit of the application limits the conformational rotation of the main chain by steric hindrance, forms size-stable intrinsic microporous ion channel, realizes the rigidification of ion channel and the intrinsic microporous structure while maintaining the excellent film-forming property of SPEEK;Long-term operation stability is excellent, preparation process is simple, raw material cost is controllable, and it is suitable for reverse electrodialysis energy conversion field.

The application discloses a modulus UV-controllable double-curing conductive adhesive film and a preparation method and application thereof, and belongs to the technical field of electronic packaging materials. The conductive adhesive film comprises an A component, a B component and a conductive filler. The A component comprises a functional acrylate copolymer prepared from a monomer mixture through solution polymerization. The monomer mixture comprises soft monomers, hard monomers, hydroxyl-containing monomers, epoxy-containing monomers, polymerizable benzophenone photoinitiators, silane coupling agents and free radical polymerization initiators. The B component comprises one or a combination of latent epoxy curing agents, conductive accelerators, curing accelerators and anti-settling agents. The application completely solves the problem of oxygen inhibition, realizes controllable adjustment of the modulus and pressure sensitivity of the adhesive film, has no small molecule residue, has excellent conductive performance and good storage stability.

The application belongs to the technical field of photoinitiators and preparation methods, and particularly relates to a preparation method of a macromolecular photoinitiator. The macromolecular photoinitiator is prepared from glycidyl methacrylate, methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, 4-benzoylbenzoic acid, 2-carboxythioxanthone, N,N-dimethylglycine, monomethoxypolyethylene glycol, monohydroxypolycaprolactone and methacrylic acid. In the preparation, a tetra-acrylate polymer containing an epoxy group and a hydroxyl group is first prepared, and then double photoinitiation structure grafting, tertiary amine structure grafting, segment grafting and epoxy closure are sequentially performed, and the feeding amount of each stage is corrected through the initial epoxy value, the first residual epoxy value and the second residual epoxy value. The method connects the benzophenone structure, the thioxanthone structure and the tertiary amine structure to the same polymer molecular chain, reduces the content of unreacted small molecules and the migration and precipitation amount, improves the photocuring gel rate and shortens the surface drying time.

This invention relates to the field of high-performance polypropylene materials technology, specifically to a biodegradable foamed polypropylene composite material and its preparation method. The invention aims to solve the problem of the inability to simultaneously achieve both mechanical and degradation performance in existing polypropylene composite materials. This invention uses modified polypropylene obtained by modifying polypropylene materials with high-density polyethylene and low-density polyethylene as the matrix material; maleic anhydride-grafted polypropylene as a compatibilizer; modified nano-silica; degradation aids obtained by melt extrusion of PBAT, ferric stearate, and benzophenone; and sulfonated lignin. Finally, a stepwise melt blending process is employed, combined with a dual foaming technology of chemical foaming agent and supercritical carbon dioxide, to obtain a polypropylene-based composite material. The resulting material exhibits excellent mechanical properties while possessing a highly efficient and controllable degradation rate, achieving a synergistic improvement in both mechanical and degradation performance.

The application discloses a green preparation method of 4,4'-difluorobenzophenone. The method uses 4,4'-difluorobenzene as raw material, potassium bromide as catalyst, acetic acid as solvent, and oxygen as oxidant, and 4,4'-difluorobenzophenone is generated in high selectivity through one-step oxidation under mild conditions. The application surprisingly finds that in the presence of potassium bromide, a new non-metallic catalytic oxidation system of potassium bromide / acetic acid / oxygen is used to realize high-efficiency and high-selectivity conversion of the C-H bond at the benzyl position. Compared with the traditional method, the application does not need to use a transition metal catalyst, does not need to use carbon tetrachloride and other materials damaging the ozone layer, and does not need to involve a dangerous intermediate such as a diazonium salt, the process route is short, the atomic economy is high, the product yield is high, the product purity is high, the catalyst is cheap and easy to obtain, and the application has excellent industrial application prospect and green chemistry characteristics.

Synergistic stabilizer compositions having a stabilizing amount of a co-synergist; optionally a stabilizing amount of a co-active agent; a stabilizing amount of an ultraviolet light absorber selected from an ortho-hydroxyphenyl triazines, ortho-hydroxy benzophenones, oxanilides, cyanoacrylates, benzoxazinones, optionally ortho-hydroxyphenyl benzotriazoles, and combinations thereof; and a stabilizing amount of a hindered amine light stabilizer, are provided herein. The total weight of co-synergist (IV) and co-active agent (when present) is from 1 wt. % to 99 wt. %, based on the total weight of the stabilizer composition; and the weight ratio of co-synergist to co-active agent (when present) is 1:99 to 99:1. Also disclosed are masterbatch concentrates, stabilized polymer compositions, and stabilized articles of manufacture, all containing the stabilizer composition.

The present application relates to a kind of metal anticorrosive coating and its preparation method, belong to the field of coating technology, with excellent hydrophobicity, high adhesion and corrosion resistance and other advantages.The coating includes A component and B component, wherein A component includes fluorocarbon resin, modified polyurea compound, fluorine-containing silane modified silica, anti-flash rust agent, defoaming agent, wetting agent, leveling agent and organic solvent;B component includes curing agent and organic solvent.Modified polyurea compound is prepared by 2,2-bis (3-amino-4-hydroxyphenyl) hexafluoropropane and 4,4'-difluorobenzophenone polycondensation, then reacted with isophorone diisocyanate, C-F bond and polyether ether ketone structure are introduced, the compatibility with fluorocarbon resin and coating adhesion are improved.Fluorine-containing silane modified silica enhances the hydrophobicity and mechanical properties of coating.The coating of the present application can be applied to metal tank body interior protection, and building, cross-sea bridge, ship and other places that are long-term rain erosion and seawater corrosion.

This invention discloses a method for preparing an aging-resistant filament masterbatch and woven plastic packaging material, belonging to the field of polymer composite materials. The method includes the following steps: 1) Designing and synthesizing a RuO2-CuO-Al2O3-SiO2 quaternary solid base composite catalyst, which can efficiently catalyze the degradation of lignin under mild conditions, significantly reducing its molecular weight and exposing active carbonyl groups; 2) Creatively coupling the degraded lignin with aminobenzophenone compounds via a Schiff base reaction, and preparing a lignin-benzophenone anti-aging agent that integrates bio-based properties and high-efficiency ultraviolet absorption after reduction; 3) Adopting a stepwise strategy, first using a supported composite modifier, then using stearic acid, to sequentially modify the surface of calcium carbonate and the anti-aging agent, solving the problem of poor compatibility of multi-component powders; 4) Combining the above modified powder with a specific ratio of new and old polypropylene / polyethylene resin to obtain a high-performance filament masterbatch.

This invention discloses a perfluorocyclobutyl aryl ether polymer containing a benzophenone structure and its preparation method. Specifically, this invention provides a copolymer A and a polymer B prepared using copolymer A as an intermediate, wherein copolymer A includes repeating unit I and repeating unit II. The polymer of this invention has the advantages of simple polymerization process, excellent performance or easy modification, and this method is suitable for large-scale batch preparation.

This invention belongs to the field of polyaryletherketone resin preparation technology, and relates to a method for preparing polyaryletherketone with low crystallinity and low melting point. Under nitrogen protection, 4,4'-difluorobenzophenone, anhydrous sodium carbonate, hydroquinone, biphenyl, and bisphenol A are added to a solvent, stirred and mixed evenly, and then heated for polymerization to obtain polyaryletherketone with low crystallinity and low melting point. The molar ratio of hydroquinone, biphenyl, and bisphenol A is 55~75:5~25:5~20. This invention uses a precise compounding system of three phenol monomers, hydroquinone, biphenyl, and bisphenol A, to achieve fine control of the molecular chain structure. By disrupting the regularity of the molecular chain through the quaternary carbon atoms in bisphenol A, the crystallinity and melting point are reduced. Biphenyl compensates for the loss of rigidity, while hydroquinone retains its intrinsic properties. This solves the problem of "reduced melting point inevitably leads to reduced heat resistance / mechanical properties" in existing technologies from the root of molecular structure.