44 results about "Diphenyl sulfone" patented technology

The invention discloses a single-component high-heat-resistance type epoxy adhesive and a preparation method of the single-component high-heat-resistance type epoxy adhesive. The adhesive is prepared from the following components in parts by weight: 30 to 40 parts of N, N-4, 4 '-diphenylmethane bismaleimide; 50 parts of bisphenol F epoxy resin; 36.47 parts of 4, 4 '-diaminodiphenyl sulfone; 20 to 40 phr of phenyl glycidyl ether; 1 to 2 phr of two terminal type epoxy silicone oil; 4 to 6 phr of hydroxyl-terminated polyether sulfone; 10 to 20 phr of boron nitride, the surface of which is modified by gamma-glycidyl ether oxypropyl trimethoxy silane; and 1 to 3 phr of an adhesion promoter. According to the adhesive disclosed by the invention, the heat resistance, the mechanical property, the dimensional stability, the process adaptability and the like are synergistically improved, the use requirements of an aviation structural part on long-term service at 150-180 DEG C and an electronic packaging device on the condition of short-time reflow soldering at about 200 DEG C can be met, and the reliability of the adhesive in a high-temperature environment is remarkably improved.

The invention discloses a precise construction strategy of a dibenzothiophene sulfuryl covalent organic framework material and systematically explains efficient application of the dibenzothiophene sulfuryl covalent organic framework material in photocatalytic synthesis of thiadiazole and derivatives thereof. The achievement relates to a plurality of leading subjects such as catalytic chemistry, organic synthesis, material science, environmental engineering and green chemistry. According to the method, 2, 4, 6-triformyl phloroglucinol and 3, 7-diaminodibenzo [b, d] thiophene-5, 5-dioxide are taken as construction units, and the crystalline S-COF rich in sulfuryl active sites can be quantitatively obtained through topology-oriented Schiff base condensation under the conditions of protonic acid catalysis, no water and no oxygen. Under the radiation condition of visible blue light, S-COF is used as a heterogeneous photocatalyst to drive green synthesis of 3, 5-di-p-tolyl-1, 2, 4-thiadiazole and series of derivatives thereof; the invention provides a new catalyst design normal form for light-induced organic conversion, and lays a solid foundation for sustainable development-oriented efficient synthesis chemistry.

The utility model discloses a kind of polysulfone granular material washing devices, relate to polysulfone production equipment technical field.Polysulfone granular material washing device, including washing kettle, heat preservation device and washing liquid circulating device, the upper portion of washing kettle is provided with feed inlet, top is provided with eluent outlet, bottom is provided with washing liquid inlet, the lower portion in washing kettle is provided with first perforated plate, upper portion is provided with second perforated plate, second perforated plate can be moved back and forth along the axial direction of washing kettle;Heat preservation device is set on washing kettle;Washing liquid circulating device includes the cooler, solid-liquid separator, washing liquid tank, circulating pump and heater connected in sequence.The technical scheme of the utility model adopts the mode of ethanol countercurrent circulation flow to wash polysulfone granular material in washing kettle, and when washing, limit the polysulfone granular material to be washed between first perforated plate and second perforated plate, can more fully elute diphenyl sulfone on polysulfone granular material, guarantee the washing effect.

The invention discloses corrosion-resistant waterproof aluminum foil glass fabric and a preparation method thereof, and belongs to the technical field of aluminum foil composite glass fabric. The corrosion-resistant waterproof aluminum foil glass fabric sequentially comprises a waterproof glass fabric, a high-temperature-resistant adhesive layer and an aluminum foil from bottom to top, the waterproof glass fabric is obtained by padding a waterproof finishing agent; the waterproof finishing agent is mainly prepared from the following raw material components: a silane coupling agent, hydroxyl-terminated fluorine-containing dihydric alcohol, isophorone diisocyanate and polycaprolactone; the high-temperature-resistant adhesive is mainly prepared from the following raw material components: 4, 4 '-oxydiphthalic anhydride, 4, 4-(hexafluoroisopropyl) bis (p-phenoxy) diphenylamine, 3, 3'-diaminodiphenyl sulfone, 1, 3-bis (3-aminopropyl)-1, 1, 3, 3-tetramethyldisiloxane, 4-amino-2-hydroxybenzaldehyde and o-phenylenediamine, and the high-temperature-resistant adhesive is prepared from the following raw material components: 4, 4 '-oxydiphthalic anhydride, 4, 4-(hexafluoroisopropyl) bis (p-phenoxy) diphenylamine, 4, 4-(hexafluoroisopropyl) bis (p-phenoxy) diphenylamine, 3, 3'-diaminodiphenyl sulfone, 1, 3-bis (3-aminopropyl) The corrosion-resistant waterproof aluminum foil glass fiber cloth prepared by the invention is relatively good in high temperature resistance, corrosion resistance and waterproofness.

The invention relates to the field of application of dielectric energy storage materials, and discloses application of a polyimide film in a dielectric energy storage material. The polyimide is prepared by copolymerizing bis [4-(4-aminophenoxy) phenyl] sulfone and 4, 4 '-(hexafluoroisopropene) diphthalic anhydride, or copolymerizing bis [4-(3-aminophenoxy) phenyl] sulfone and 4, 4'-(hexafluoroisopropene) diphthalic anhydride, or copolymerizing bis [4-(3-aminophenoxy) phenyl] sulfone and 4, 4 '-(hexafluoroisopropene) diphthalic anhydride. Ether bonds are introduced to two sides of diphenyl sulfone to destroy a continuous conjugated structure between an imide ring and diphenyl sulfone, hexafluoroisopropylene with high electronegativity is introduced into a dianhydride unit, and high-temperature insulativity is improved through interaction of the three. When the prepared polyimide film is used as a dielectric medium energy storage material, the high-temperature insulation property is improved while the heat resistance and the relatively high dielectric constant are maintained, so that the energy storage property of a capacitor is improved. The discharge energy density of 7.25 J / cm < 3 > and 4.79 J / cm < 3 > is realized at 200 DEG C and 250 DEG C respectively, and the efficiency is greater than 90%.

The invention provides polyether sulphone and a preparation method thereof. The preparation method comprises the following steps: mixing a polar aprotic solvent, a bisphenol monomer and an alkaline substance, introducing protective gas, heating, dehydrating, cooling to T1, adding a diphenyl sulfone monomer, and carrying out heat preservation at T1 to carry out a first-stage polymerization reaction; adding a low-polarity solvent, heating to T2, and carrying out second-stage polymerization reaction to obtain polyether sulfone; wherein the low-polarity solvent is selected from one or a combination of more than two of normal hexane, cyclohexane, methylbenzene, ethylbenzene, biphenyl and diphenyl ether. By reducing or partially inhibiting the generation of the cyclic oligomer in the reaction process, the polyarylether sulfone with narrow molecular weight distribution and low content of the cyclic polymer is obtained. The method provided by the invention is simple and easy to implement, is convenient to control, avoids complex product purification and separation processes, and is beneficial to industrial implementation.

The invention belongs to a resin fiber layered product, and particularly relates to a light-weight high-warm-keeping down jacket fabric and a preparation method of the light-weight high-warm-keeping down jacket fabric. The preparation method comprises the following steps: preparing a modifier from 4, 4 '-diaminodiphenyl sulfone and phenylphosphoryl dichloride as raw materials, mixing the modifier with caprolactam, carrying out a polymerization reaction, carrying out melt spinning and weaving to obtain a modified nylon base cloth layer, forming an electrospun layer on the modified nylon base cloth layer through emulsion electrostatic spinning, and finally carrying out vacuum freeze drying to obtain the down jacket fabric. The light and thin performance and high warm keeping performance of the fabric can be guaranteed, and the breaking strength can be improved.

The present application relates to a kind of resin composition and its preparation method and application, the resin composition includes the following components according to weight parts: phenoxy resin 50-80 weight parts, epoxy resin 10-40 weight parts, toughening agent 5-20 weight parts and amine curing agent 5-15 weight parts;The epoxy resin includes the combination of difunctional epoxy resin and multifunctional epoxy resin;The mass percentage content of difunctional epoxy resin in the epoxy resin is 10-40%;The toughening agent includes any one or the combination of at least two in carboxyl polyester, carboxyl polyurethane or core-shell rubber;The amine curing agent includes any one or the combination of at least two in dicyandiamide, 4,4' diamino diphenyl sulfone, 3,3' diamino diphenyl sulfone or 4,4' diamino diphenyl methane.The present application can improve the fatigue resistance and bending resistance of covering film by designing the components of resin composition.

The invention relates to the technical field of layered composite fabrics, in particular to an antibacterial wear-resistant multi-layer composite fabric and a preparation process thereof. The invention relates to a preparation process of an antibacterial wear-resistant multilayer composite fabric. The preparation process comprises the following steps: preparing surface modified nano silicon dioxide; preparing an antistatic additive; preparing an outer-layer fabric; preparing an inner layer fabric; and preparing the multi-layer composite fabric. The preparation method comprises the following steps: aminating the surface of nano silicon dioxide by using a silane coupling agent, and grafting 4, 4 '-dihydroxy diphenyl sulfone and hexachlorocyclotriphosphazene to the surface of the aminated nano silicon dioxide by using triethylamine as an acid-binding agent, so that the nano silicon dioxide can be promoted to be uniformly dispersed in a polyester matrix; according to the present invention, the modified nano-silica is added into the polyester fiber, such that the compatibility of the nano-silica and the polyester matrix is improved, the combination is firm, the nano-silica does not easily fall off during repeated friction so as to effectively improve the wear resistance of the outer layer fabric, and the modified nano-silica is dispersed in the polyester fiber so as to effectively improve the flame retardant property of the outer layer fabric.

The invention discloses a chlorine-free etching agent for a photovoltaic printing tungsten steel mesh and a preparation method and application of the chlorine-free etching agent for the photovoltaic printing tungsten steel mesh, and the chlorine-free etching agent for the photovoltaic printing tungsten steel mesh comprises the following components in percentage by weight: 0-2.5% of o-aminophenol sulfonic acid; 0 to 3% of diphenyl sulfonyl-4, 4 '-difluoro-3, 3'-disodium disulfonate; 0 to 1.2 percent of 2, 5-bis (methylsulfonyl)-1, 4-phenylenediamine; 0.5 to 2% of 2, 5-dimethyl phenyl thiourea; 0.2 to 3% of 5-(difluoromethoxy)-2-sulfydryl-1H-benzimidazole, and the balance of water; 0 to 2% of a hydroxyl-terminated vinyl pyrrolidone-styrene copolymer; 33-70% of an acidic etching main agent; the acidic etching main agent is a mixture of nitric acid, hydrofluoric acid and phosphoric acid. According to the etching solution, through the synergistic effect of all the components, the effect that the diameter of the tungsten steel mesh is accurately etched from 10 micrometers to 6 micrometers at the normal temperature is achieved, and the smoothness and brightness of the surface of the etched tungsten steel mesh are considered.

The invention relates to a preparation method of a hollow fiber gas separation membrane for decarburization of oilfield associated gas, and belongs to the technical field of separation membranes, and the preparation method specifically comprises the following steps: mixing 4, 4 '-diaminodiphenyl sulfone with diamine under the protection of argon, and then adding a solvent N, N-dimethylacetamide; after diamine is completely dissolved, dianhydride is added in batches until a polyamide acid prepolymer solution is obtained through stirring; adding a dehydrating agent and a catalyst into the polyamide acid prepolymer solution to generate a polyimide solution; the preparation method comprises the following steps: mixing dianhydride with sulfuryl-containing diamine, then adding the sulfuryl-containing diamine into a reaction solution, then pouring the reaction solution into a precipitant methanol to separate out a polymer, washing and drying to obtain a polyimide solid, then preparing the polyimide solid into a membrane casting solution, and carrying out a spinning process to obtain the hollow fiber gas separation membrane. And the hollow fiber gas separation membrane is prepared by spinning, so that the molecular chain structure is optimized, and the comprehensive performance of the material is improved.

The application relates to the paint technology field and discloses a high-temperature-resistant paint and a preparation method thereof. Epoxy resin, a filler, a dispersing agent and a defoaming agent are added into a solvent, a curing agent is added after stirring, and the high-temperature-resistant paint is obtained. The curing agent is composed of a polyamide curing agent and UPy diamino diphenyl sulfone; UPy structure forms stable quadruple hydrogen bond action in the molecular chain bond of the epoxy resin, the crosslinking density of the epoxy resin is improved, when the epoxy resin is stressed, the quadruple hydrogen bond can be broken by absorbing energy at the same time, stress can be consumed and energy can be transmitted, the paint curing product is not damaged by stress, has good toughening effect, and the toughness of the paint film is improved. The heat-resistant diphenyl sulfone structure is introduced into the molecular chain of the epoxy resin, the high-temperature-resistant performance of the paint is improved, and the paint has higher thermal decomposition temperature.

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 invention belongs to the technical field of electromagnetic wires, and particularly relates to a polyether-ether-ketone electromagnetic wire and a preparation method thereof. The electromagnetic wire provided by the invention comprises a copper conductor, wherein the copper conductor is sequentially coated with an insulating layer A and an insulating layer B from inside to outside; the raw materials of the insulating layer A comprise a diphenyl ether monomer and terephthaloyl chloride, and the diphenyl ether monomer comprises 4, 4 '-diphenoxy diphenyl sulfone; and the raw materials of the insulating layer B comprise fluororesin and polyether-ether-ketone. According to the polyether-ether-ketone electromagnetic wire, the adhesiveness of the insulating layer and the copper conductor is remarkably improved, the falling or cracking risk of the insulating layer is effectively reduced, meanwhile, the electromagnetic wire has excellent insulating performance, and the polyether-ether-ketone electromagnetic wire is particularly suitable for high-frequency and high-voltage application scenes.

The invention discloses a super heat-resistant resin composition, which is prepared from the following ingredients in parts by weight: 10 to 80 parts of bismaleimide, 5 to 50 parts of phthalonitrile compounds and 10 to 60 parts of epoxy resin. The diphenylsulfone bismaleimide is selected for preparing the resin composition, sulfonyl of the diphenylsulfone bismaleimide contains two-sulfur-oxygen double bonds, and the bond energy of sulfur-oxygen double bonds is very high, so that the molecular structure is very difficult to damage in a high-temperature environment, the high-temperature resistance of the resin composition is greatly improved, and meanwhile, the diphenylsulfone bismaleimide has a plurality of benzene ring structures, so that the high-temperature resistance of the resin composition is greatly improved. The diphenylsulfone bismaleimide is added into the resin composition, so that the rigidity is relatively strong, the thermal stability of the resin composition is improved, the heat resistance of the resin composition is further improved, and the diphenylsulfone bismaleimide is high in symmetry, so that a high-density cross-linked network is easier to form, and the heat resistance of the resin composition is further improved. And the phthalonitrile and phthalonitrile compound with better heat resistance is added into the resin system, so that the heat resistance of the resin composition is further improved.

The invention discloses polysulfone resin as well as a preparation method and application thereof. The weight-average molecular weight Mw of the polysulfone resin ranges from 20000 to 200000, the content of cyclic dimers is smaller than 1.2 wt%, the content of residual monomers is smaller than 100 ppm, the content of K and Na ions is smaller than 60 ppm, the content of Fe and Cu ions is smaller than 10 ppm, the yellowness index YI does not exceed 12, and the light transmittance is larger than 85%. The polysulfone resin disclosed by the invention is obtained by taking a para-dihalogen diphenyl sulfone compound and a bisphenol A type compound or a 4, 4 '-biphenol type compound as raw materials, an aprotic polar solvent as a reaction solvent and inorganic salt as a salt-forming agent through polymerization by a nucleophilic substitution method. The method comprises the following steps: designing an incompatible solvent system, enabling resin powder to be in contact with an acidic aqueous solution containing a catalyst in a dissolved state, carrying out ring opening and degradation on a cyclic dimer through an interface reaction, simultaneously removing residual single and metal ions through extraction, and carrying out devolatilization and granulation on the purified resin powder to obtain the comprehensively purified polysulfone resin. The optical performance and the like influenced by the resin purity are greatly improved.

This invention discloses an impact-resistant polyethersulfone composite material and its preparation method. A modified polymer and a modified filler are melt-blended, and a pretreated film is prepared using a blown film process. The pretreated film and a modified nonwoven fabric are then laminated and hot-pressed to obtain the impact-resistant polyethersulfone composite material. The modified polyethersulfone is formed by the stepwise polymerization of 4,4'-difluoro-diphenyl sulfone and a dihydroxy monomer, and then hindered amine structures are grafted onto the molecular side to obtain the modified polymer. The hindered amine structures can capture free radicals, improving the material's anti-aging properties, while the disulfide bond structure can absorb energy when the material is impacted, enhancing its impact resistance. A modified filler is prepared by coating a composite filler formed from TiO2 and CeO2 with silica, which can efficiently absorb and convert ultraviolet light, improving the material's anti-aging properties. Simultaneously, the interlayer nonwoven fabric structure effectively prevents cracks from directly penetrating to adjacent layers, enhancing the material's impact resistance.

The application relates to the technical field of organic photoelectricity, and particularly discloses a bipolar photoelectric material and application thereof, the bipolar photoelectric material has the following general formula: in the general formula, R1 is hydrogen, an aromatic hydrocarbon and derivatives thereof, an electron-donor carbazole and derivatives thereof, a phenoxazine and derivatives thereof, or an acridine and derivatives thereof; R2 is an aromatic hydrocarbon and derivatives thereof, an electron-donor carbazole and derivatives thereof, a phenoxazine and derivatives thereof, or an acridine and derivatives thereof; and R3 is an aromatic hydrocarbon and derivatives thereof, an electron-donor carbazole and derivatives thereof, a phenoxazine and derivatives thereof, or an acridine and derivatives thereof; the hydrogen in R1 can be partially replaced by deuterium or fully replaced by deuterium or not replaced by deuterium; the bipolar photoelectric material is introduced with a diphenyl sulfone thiophene sulfoxide electron-deficient group as a light-emitting unit and an electron-withdrawing unit in a molecular structure, the introduction of the group can improve the carrier mobility of the material, is beneficial to charge balance, and is further beneficial to obtaining high light-emitting efficiency.

The present application relates to the technical field of polycarbonate plate, and particularly relates to a weather-resistant flame-retardant polycarbonate plate and a preparation process thereof. The preparation process of the weather-resistant flame-retardant polycarbonate plate comprises the following steps: preparing titanium dioxide composite material; preparing polyphosphate flame retardant; preparing modifier; preparing modified nanosilica; and preparing polycarbonate plate. In the present application, p-methyl phenyl phosphoric dichloride is reacted with 4,4-dihydroxy diphenyl sulfone and hydroxyl-terminated polydimethylsiloxane to obtain polyphosphate flame retardant. After the polyphosphate flame retardant is added into polycarbonate, the anti-ultraviolet aging performance of the polycarbonate plate can be improved in cooperation with the titanium dioxide composite material. In addition, the polyphosphate is decomposed to generate phosphorus-oxygen active groups under heat, so as to capture combustion chain reaction free radicals. Meanwhile, the siloxane component and phosphorus element catalyze the formation of carbon layer in cooperation, so as to construct a dense heat-resistant barrier layer, thereby effectively improving the flame-retardant performance of the polycarbonate plate.

The invention provides a method for catalytic synthesis of diphenyl sulfone by solid acid, and belongs to the technical field of diphenyl sulfone preparation, and the method comprises the following steps: S1, adding benzene and a solid acid catalyst into a reaction container, heating, and dropwise adding benzene sulfonyl chloride for reaction; s2, after the reaction is finished, obtaining a diphenyl sulfone crude product solution, and performing post-treatment on the diphenyl sulfone crude product solution to obtain a diphenyl sulfone crude product; s3, the diphenyl sulfone crude product is subjected to melt crystallization, a diphenyl sulfone refined product is obtained, and the purity of the diphenyl sulfone refined product is shown in the specification; and the solid acid catalyst is any one of SO4 < 2-> / TiO2-SiO2, SO4 < 2-> / WO3-ZrO2, SO4 < 2-> / ZrO2-Al2O3 and WO3 / ZrO2. The solid acid is used as the catalyst and can be recycled and reused, the catalyst does not need to be quenched, wastewater containing ferric chloride is not generated, energy consumption is low, purity is high, and meanwhile pollution of organic solvents to the environment is avoided.

Provided herein are functional diphenyl sulfone macromers having a grafted polymer side chain, copolymers having repeat units derived from functional diphenyl sulfone macromers having a grafted polymer side chain, and porous polymer articles containing these copolymers. The graft polymer side chains contain repeating units derived from monomers having ethylenically unsaturated groups. The porous polymer articles are typically membranes, which may be platelets or hollow fibers, and can be used to separate mixtures of biological materials having different average sizes based on the average pore size of the porous polymer articles. For example, biological materials such as proteins, viruses, and cells may be isolated based on size.

The invention relates to the technical field of preparation of high-performance engineering plastics, in particular to polyether-ether-ketone resin and a preparation method thereof. The invention discloses polyether-ether-ketone resin and a preparation method of the polyether-ether-ketone resin. The preparation method comprises the following steps: by taking 4, 4 '-difluorobenzophenone, hydroquinone, alkali carbonate and diphenyl sulfone as raw materials, carrying out condensation polymerization to obtain a high-molecular-weight polyether-ether-ketone melt, adding an alkylphenol-polyether sulfone oligomer with a specific structure into the high-molecular-weight polyether-ether-ketone melt as a phase separation aid, and inducing a byproduct salt to be enriched and grown into a micron-sized aggregate in the melt; then, the melt is subjected to alternate online filtering and online cleaning, a salt-rich phase is intercepted, and in-situ desalination in a molten state is achieved; and pelletizing, extracting and drying the filtered clean melt to obtain the product. The polyether-ether-ketone resin prepared by the preparation method has excellent processing stability and mechanical properties.

The invention provides a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a substrate, a first electrode, a first carrier transport layer, a perovskite light absorption layer, a second carrier transport layer and a second electrode which are sequentially stacked, and the first carrier transport layer and the second carrier transport layer are independently selected from a hole transport layer or an electron transport layer. The material of the hole transport layer comprises an organic compound, and the organic compound comprises a dibenzothiophene sulfone compound. The dibenzothiophene sulfone compound with the specific structure is applied to a perovskite solar cell system, and the photoelectric conversion efficiency of a perovskite solar cell can be remarkably improved.

The invention discloses sulfonated polyarylether sulphone resin. The sulfonated polyarylether sulphone resin is derived from bisphenol S and a dichloro monomer; the dichloro monomer is selected from 4, 4 '-dichloro diphenyl sulfone and 4, 4'-dichloro diphenyl sulfon-3, 3 '-disulfonic acid dimetal salt; the range of the molar ratio of bisphenol S to the dichloro monomer is 1: (0.95-1.05). According to the invention, a specific content of sulfone monomers containing sulfonic acid groups are introduced into a repeated unit of the polyarylether sulfone resin, so that the thermal deformation temperature of the resin can be effectively increased, and the antibacterial performance and light transmittance of the resin are improved.

The present application relates to the technical field of insulating glue, more particularly to a kind of radiation-resistant composite resin insulating glue and preparation method thereof, and the radiation-resistant composite resin insulating glue includes the following components: modified polycyanate, modified graphene and curing agent;The amount of modified graphene is 0.5%~5% of the weight of modified polycyanate, and the amount of curing agent is 1%~10% of the weight of modified polycyanate.The present application modifies bisphenol A type cyanate ester chemically, modifies 4,4'-diamino diphenyl sulfone and p-hydroxy phenol acrylate monomer into bisphenol A type cyanate ester polymer, and the prepared modified polycyanate is used as a matrix to match modified graphene and curing agent, and after curing, the radiation-resistant composite resin insulating glue maintains excellent dielectric properties and bonding properties, improves the radiation resistance, toughness and insulation performance of the radiation-resistant composite resin insulating glue, and is conducive to biodegradation, and is an excellent environmentally friendly electronic material insulating glue.

The invention relates to the technical field of high polymer materials, in particular to extrusion type corona-resistant polyimide resin and a preparation method thereof. The extrusion type corona-resistant polyimide resin is prepared from the following raw materials: a diamine monomer and a dianhydride monomer, the diamine monomer has a structural formula as shown in a formula I, and the dianhydride monomer is selected from at least one of bisphenol A type diether dianhydride and 3, 3 ', 4, 4'-diphenylsulfonyltetracarboxylic dianhydride. A diamine monomer with a specific structure and a diamine monomer with specific components are polymerized, and a fluorine element and sulfuryl are introduced into molecules, so that the corona resistance and mechanical strength of the resin are improved; meanwhile, the dielectric constant of the extruded polyimide can also be reduced.

A method (A) for preparing a mixture comprising 4,4'-substituted diphenylsulfones from a polymeric material comprising at least one PES polymer, comprising (a) contacting the polymeric material with an ammonia source to depolymerize the PES polymer and (b) recovering a depolymerized mixture comprising 4,4'-substituted diphenylsulfones. A method (B) for preparing at least one 4,4'-substituted diphenylsulfone product, comprising the steps (a) and (b) and further at least one isolation step (c). A 4,4'-substituted diphenylsulfone product comprises dapsone and 4-amino-4'-hydroxydiphenylsulfone [A-B compound], or comprises the A-B compound and bisphenol S. When the polymeric material contains PVP, there is no detectable PVP in the 4,4'-substituted diphenylsulfone product.

This application provides a method for producing polyetheretherketone (PEEK) byproducts, belonging to the field of polymer compound preparation and recycling technology. Using 4,4'-difluorobenzophenone and hydroquinone as monomers, sodium carbonate as alkali, potassium carbonate as catalyst, and diphenyl sulfone as solvent, a polymer resin crude powder is obtained through polymerization. This powder is then sequentially washed with organic solvent and pure water, followed by drying to obtain the finished PEEK resin. The organic solution generated from the organic solvent washing process is distilled to recover the organic solvent and diphenyl sulfone for recycling. The washing solution generated from the pure water washing process is distilled to remove the organic solvent, then neutralized with hydrogen fluoride, adsorbed to remove impurities, distilled, and separated to obtain crude sodium fluoride. This crude sodium fluoride is then pulped with solvent and dried to obtain electronic-grade sodium fluoride. The concentrated mother liquor and pulping mother liquor are evaporated to dryness to obtain industrial-grade sodium fluoride. This application achieves efficient recovery and resource utilization of solvents, cleaning media, and byproducts in the PEEK production process, aligning with a green circular economy model.

The invention relates to the field of engineering plastic preparation, in particular to a polyetheretherketone polymerization preparation process which specifically comprises the following steps: pre-melting and oxygen control of raw materials: heating 4, 4 '-difluorobenzophenone to be molten for later use, heating diphenyl sulfone, and adding a sodium / potassium carbonate mixture to prepare a suspension; carrying out gradient polymerization in a first-stage reactor: introducing the pre-molten 4, 4 '-difluorobenzophenone, a diphenylsulfone solution containing hydroquinone and a diphenylsulfone suspension of sodium / potassium carbonate into the first-stage reactor in proportion, and carrying out pre-polymerization and salt forming reaction; regulating and controlling segmented polymerization and in-situ complexation in a secondary reactor: feeding the material into the front 2 / 3 section of the secondary reactor for polymerization, performing dynamic fluctuation of a temperature field in the rear 1 / 3 section of the secondary reactor, and simultaneously injecting excessive 4, 4 '-difluorobenzophenone for competitive end-capping complexation; discharging the melt and curing the sheet; second-stage washing: sequentially carrying out organic washing and acidizing water washing on the slices to finish metal ion elution; performing vacuum drying; and the long-term service reliability of the electronic and electrical PEEK is improved.