45 results about "Bisphenol AF" patented technology

The invention relates to the field of copper-clad plates, and discloses a low-dielectric-constant high-performance copper-clad plate and a preparation method thereof.The preparation method comprises the specific steps that epoxy resin, phenolic resin, polyphenyl ether modified resin, modified nano silicon dioxide and the like are taken and mixed to obtain a resin glue solution; impregnating glass fabric in the resin glue solution to obtain a prepreg; laminating prepregs, and covering copper foil for hot pressing; the polyphenyl ether modified resin comprises epoxy resin, diallyl cyanate and fluorine-containing polyphenyl ether resin prepared by reaction of polyphenyl ether, bisphenol AF and benzoyl peroxide; the modified nano silicon dioxide is prepared by reacting allyl glycidyl ether, vinyltriethoxysilane and phenyltris (dimethylsiloxane) silane, then grafting with a phosphorus-containing intermediate to prepare a modified additive, and grafting with nano silicon dioxide, and the phosphorus-containing intermediate is prepared by reacting phenylphosphoryl dichloride and eugenol. The copper-clad plate with high flame retardance, high peel strength, heat resistance and low dielectric constant is prepared.

The invention provides anti-cracking perfluoroether rubber as well as a preparation method and application thereof, and relates to the technical field of rubber materials. The anti-cracking perfluoroether rubber is prepared from the following materials in parts by weight: 100 parts of perfluoroether rubber, 10 to 20 parts of fluorine-containing nano SiO2, 20 to 30 parts of BN-coated SiO2, 2 to 5 parts of a silane coupling agent, 1 to 3 parts of a peroxide cross-linking agent, 1 to 3 parts of a bisphenol AF cross-linking agent, 1 to 2 parts of an antioxidant, 1 to 2 parts of a heat stabilizer, 0.5 to 1 part of a lubricating agent and 0.5 to 1 part of a dispersing agent. The invention aims to provide the novel anti-cracking perfluoroether rubber aiming at the defects in the prior art, and the overall anti-cracking performance of the material is improved.

The present invention relates to the field of copper clad laminates, and discloses a copper clad laminate with low dielectric constant and high performance and a preparation method thereof. The specific steps are as follows: taking epoxy resin, phenolic resin, polyphenylene ether modified resin, modified nano-silica, etc. and mixing them to obtain a resin glue solution; impregnating glass fiber cloth in the resin glue solution to obtain a prepreg; taking the prepregs and laminating them and hot pressing them with copper foil; the polyphenylene ether modified resin includes epoxy resin, diallyl cyanate, and a fluorinated polyphenylene ether resin prepared by reacting polyphenylene ether, bisphenol AF, and benzoyl peroxide; the modified nano-silica is prepared by reacting allyl glycidyl ether and vinyltriethoxysilane with phenyltris(dimethylsilyl)silane, and then grafting it with a phosphorus-containing intermediate to form a modified additive, and grafting the modified additive with nano-silica. The phosphorus-containing intermediate is prepared by reacting phenylphosphoryl dichloride and eugenol. A copper clad laminate with high flame retardancy, high peel strength, and heat-resistant low dielectric constant is prepared.

The invention provides perfluoroether rubber resistant to strong alkaline solvents as well as a preparation method and application of the perfluoroether rubber, and relates to the technical field of rubber materials. The perfluoroether rubber resistant to the strong alkaline solvent is prepared from the following materials in parts by weight: 70 to 80 parts of perfluoroether rubber, 8 to 12 parts of nano silicon dioxide, 5 to 7 parts of fluorosilane surface modified ZrO2atAl2O3, 4 to 6 parts of silicon carbide, 2 to 4 parts of peroxide cross-linking agent, 2 to 3 parts of bisphenol AF cross-linking agent, 1.5 to 2.5 parts of anti-aging agent, 1.5 to 2.5 parts of antioxidant, 0.3 to 0.5 part of lubricating agent and 0.4 to 0.6 part of dispersing agent. The invention aims to provide the novel perfluoroether rubber resistant to the strong alkaline solvent aiming at the defects in the prior art, and the strong alkaline solvent resistance of the material is improved.

The invention provides an oil-in-water type formaldehyde-free memory microcapsule pigment, hot erasable formaldehyde-free water-based ink and a preparation method thereof, the oil-in-water type formaldehyde-free memory microcapsule pigment comprises the following components in percentage by mass: 5%-20% of polyvinyl alcohol, 1.25%-10% of styrene-maleic anhydride, 5%-10% of chitosan, 7.5%-17.5% of a thermochromic pigment, 5%-10% of bisphenol AF, 5%-10% of a polyurethane prepolymer, 12%-20% of an oil phase solvent, 0.25%-2% of an accelerant and the balance of water. The hot erasable formaldehyde-free water-based ink prepared on the basis of the oil-in-water type formaldehyde-free memory microcapsule pigment has the advantages of being formaldehyde-free, green, environment-friendly, smooth in writing and the like.

The invention discloses a high-temperature-seawater-resistant and low-pressure-change fluororubber composition, vulcanized rubber as well as a preparation method and application thereof. The high-temperature-seawater-resistant and low-pressure-change fluororubber composition comprises a raw rubber matrix, a reinforcing agent, an active agent, a compound vulcanizing agent, an accelerant, an assistant crosslinking agent, an acid acceptor and a release agent, the compound vulcanizing agent is a mixture of bisphenol AF and bis (2, 5-dimethyl-2, 5-diphenol); the reinforcing agent is a mixture of carbon black and graphite powder; the acid acceptor is a mixture of high-activity magnesium oxide and calcium hydroxide; and the active agent is active zinc oxide. According to the invention, bisphenol AF and bis 2, 5 are adopted as a compound vulcanization system, activated zinc oxide is adopted as an active agent of the compound vulcanization system, and carbon black and lamellar graphite powder are adopted as reinforcing fillers and are jointly added into fluororubber to act together with other components; the obtained fluororubber composition can make the prepared vulcanized rubber have high strength, high elongation at break, high-temperature seawater resistance and low compression set, and can meet the application requirements of the valve seat ring of the marine butterfly valve.

The present application relates to a kind of medicine sealing plug and its preparation method, its sealing plug includes core body, self-sealing body and sealing body, the lower end of core body forms the plug neck of big cone shape from top to bottom, the center of plug neck forms the cone hole of big cone shape from top to bottom;The components of core body include brominated butyl rubber, white carbon black, dicumyl peroxide, zinc oxide, stearic acid, amino silane coupling agent;Self-sealing body is conical to be embedded in cone hole, the components of self-sealing body include brominated butyl rubber, white carbon black, polyisobutylene, sulfur, TBBS, zinc oxide, stearic acid;Sealing body is conical sleeve to be set on plug neck, the components of sealing body include fluorine rubber, white carbon black, perfluoropolyether plasticizer, bisphenol AF, BPP, heat stabilizer;Core body, self-sealing body and sealing body are formed by moulding vulcanization.

The invention relates to the technical field of composite material processing, in particular to a high-dimensional-stability and high-conductivity modified polyaryletherketone composite material and a preparation method thereof. Comprising the following materials: a modified carbon material with at least one-dimensional scale, bisphenol AF type polyether-ether-ketone as an interface modifier, and PAEK resin; the structure of the modified carbon material is that a nano conductive material is attached to the surface of a carbon nano material in situ, and the nano conductive material is nano conductive metal or nano conductive metal oxide; after uniform mixing, melt blending is performed to obtain granules, and then crystallization molding is performed to obtain a composite material; the conductive carbon material is treated to form a composite conductive structure, and the interface modifier is combined, so that the conductivity and the dimensional stability of the composite material can be greatly improved while filler agglomeration is reduced.

The invention discloses a self-repairing fluorinated silicone rubber sealing material, and belongs to the technical field of rubber. The self-repairing type fluorosilicone rubber sealing material is prepared from the following raw materials in parts by weight: 55 to 65 parts of fluorosilicone rubber, 15 to 25 parts of fluororubber, 10 to 15 parts of double-wall repairing microcapsules, 4.5 to 5.0 parts of compatibilizer, 1.5 to 3.0 parts of bisphenol AF, 1.0 to 2.0 parts of accelerant BPP, 2.0 to 3.0 parts of acid acceptor and 3.0 to 6.5 parts of vulcanizing agent BIBP. The core material of the double-wall repairing microcapsule is hydrogen-containing fluorosilicone oil and a Karstedt catalyst, the inner wall of the double-wall repairing microcapsule is made of polyurethane, and the outer wall of the double-wall repairing microcapsule is made of polyurea. The preparation method comprises the following steps: pretreating a double-wall repairing microcapsule by using a compatibilizer, mixing the pretreated double-wall repairing microcapsule with other raw materials, carrying out two-stage vulcanization treatment to obtain the self-repairing fluorinated silicone rubber sealing material, and releasing a repairing agent when the rubber sealing material is actually damaged to realize chemical bond-level repairing.

This invention relates to the fields of environmental and bioanalytical technology, and particularly to a method for simultaneous pretreatment and detection of bisphenol S and bisphenol AF in biological tissues. The technical solution includes a framework process for simultaneous pretreatment and detection of bisphenol S and bisphenol AF in biological tissues. This invention establishes a dual-solvent secondary extraction system composed of n-hexane and methyl tert-butyl ether, achieving differentiated adaptation to different tissue matrices. By combining the advantages of non-polar and moderately polar solvents, it can simultaneously handle the relatively highly polar bisphenol S and the relatively non-polar bisphenol AF in a single extraction process. Furthermore, this method sets key physical parameters during the extraction process according to the histological characteristics of each organ. For heart and lung tissues, specific ultrasonic power is used to ensure thorough cell disruption; while for liver and spleen with high lipid content, different power and time are used to ensure the full release of lipid-bound target substances.

The invention relates to the technical field of rubber, in particular to a high-temperature-resistant rubber-based elbow and a preparation method thereof. The preparation method comprises the following steps: blending a flexible flame-retardant acrylic copolymer and fluororubber, stirring, dissolving, demulsifying, washing with water, and drying in vacuum to obtain the modified fluororubber. Mixing butyl rubber, vinyl modified white carbon black, sulfur, activating agent zinc oxide and accelerating agent 2-mercaptobenzimidazole, and performing mixing and calendering to obtain an inner rubber layer; mixing modified fluororubber, vinyl modified white carbon black, bisphenol AF, an activator calcium hydroxide and an accelerant benzyl triphenyl phosphorus chloride, and carrying out mixing and calendering to obtain an outer rubber layer; an inner rubber layer, a nylon fabric layer and an outer rubber layer are sequentially laid, steel wires are wound after vulcanization, and the rubber-based elbow is obtained; and then the connecting piece and the rubber-based elbow are assembled and formed, and a finished product is obtained. The finished product prepared by the invention has good high-temperature resistance, flame retardance and mechanical properties, so that the finished product has a wide application prospect in the technical field of rubber.

The invention belongs to the technical field of epoxy resin, and particularly relates to bisphenol AF type glycidyl ether, a preparation method thereof, an adhesive prepared from the bisphenol AF type glycidyl ether and a preparation method of the adhesive. The preparation method of the bisphenol AF type glycidyl ether comprises the following steps: adding bisphenol AF and epichlorohydrin into a reaction container, stirring and dissolving, heating and maintaining, then adding a catalyst, heating again to carry out a ring-opening reaction, and after the reaction is finished, carrying out rotary evaporation to remove redundant epichlorohydrin and recycling; dropwise adding a NaOH solution, and carrying out ring-closure reaction at room temperature to obtain a crude product of a ring-closed chlorohydrin ether solution; and adding the crude product of the closed-loop chlorohydrin ether solution into a reaction container, adding an organic solvent for dissolving, heating, refluxing, washing, and carrying out rotary evaporation to remove the solvent, thereby obtaining the bisphenol AF type glycidyl ether. The bisphenol AF-type diglycidyl ether according to the present invention has excellent productivity and workability, low viscosity, and excellent blocking resistance.

The utility model relates to a kind of enhanced edge sealing teflon adhesive tape structure, include non-active PTFE film, first fluorine rubber being arranged in non-active PTFE film layer lower layer, active PTFE film being arranged in first fluorine rubber lower layer, second fluorine rubber being arranged in active PTFE film lower layer, viscose layer being arranged in second fluorine rubber lower layer;The first fluorine rubber and active PTFE film are mutually staggered and set multiple layers;So first fluorine rubber and second fluorine rubber overflow after heat pressing to form ladder with non-active PTFE film layer and active PTFE film;First fluorine rubber and second fluorine rubber overflow end are smeared with bisphenol AF for vulcanization;The utility model forms ladder overflow glue by active PTFE film and fluorine rubber superposition heat pressing Form mechanical anchoring effect, lock interfacial, block edge permeation path, and bisphenol AF is in edge local crosslinking fluorine rubber, form the "sealing frame" of high crosslinking density, so as to can significantly improve edge sealing reliability.

The application relates to the technical field of high polymer material processing, in particular to a high-strength modified polyaryletherketone profile and a preparation method thereof, S1, chopped fibers are subjected to surface activation treatment after being heated and impurity-removed, then are subjected to ultrasonic immersion treatment in an interface treatment solution, and the interface treatment fibers are obtained by taking out and drying; the interface treatment agent contained in the interface treatment solution is a bisphenol AF type polyaryletherketone PI-PAEK containing an imide side group; S2, the interface treatment agent is used or not used to melt blend with polyaryletherketone resin as a matrix resin, and the interface treatment fibers are subjected to melt blending extrusion, granulation and molding to obtain the high-strength modified polyaryletherketone profile; the modified polyaryletherketone profile has high mechanical properties, a high glass transition temperature and a low thermal expansion coefficient.

The invention discloses a strong-alkali-resistant water-based industrial paint and a preparation method thereof, and relates to the technical field of paints. When the strong-alkali-resistant water-based industrial paint is prepared, polysiloxane and allyl glycidyl ether react to prepare epoxidized polysiloxane; the preparation method comprises the following steps: reacting a graphene nanosheet with glycidyl furfuryl ether and a phosphorus-containing furan monomer to prepare a pre-modified graphene nanosheet; the pre-modified graphene nanosheet and 2, 4-dihydroxy benzophenone are subjected to a reaction, and a modified graphene nanosheet is prepared; the preparation method comprises the following steps: reacting bisphenol AF with epoxy chloropropane to prepare a fluorine-containing epoxy monomer; the preparation method comprises the following steps: emulsifying epoxy resin, a fluorine-containing epoxy monomer and epoxidized polysiloxane to prepare an epoxy resin emulsion; and uniformly mixing the epoxy resin emulsion, the modified graphene nanosheets and a curing agent to prepare the strong-alkali-resistant water-based industrial paint. The strong-alkali-resistant water-based industrial paint prepared by the invention has excellent strong alkali resistance, flame retardance and aging resistance.

The invention discloses a synthesis method of hexafluorodianhydride, which belongs to the field of chemical synthesis, and specifically comprises the following steps: (1) bisphenol AF and an alkaline substance react under a heating condition; then carrying out Kolbe-Schmitt reaction on the reaction product I and carbon dioxide at high temperature and high pressure, and acidifying by adopting inorganic acid to obtain an intermediate I; (2) dissolving the intermediate I in a reaction solvent, adding inorganic alkali, transferring into a nitrogen atmosphere, adding a nickel catalyst, a ligand and metal manganese, transferring into a carbon dioxide atmosphere, carrying out carboxylation reaction, and sequentially quenching, extracting, drying, filtering and carrying out reduced pressure distillation on a reaction product II to obtain an intermediate II; and (3) carrying out heating reflux on the intermediate II and acetic anhydride, and carrying out a dehydration reaction to obtain hexafluorodianhydride. Through the limited three-step synthesis method, the synthesis route is simplified, the synthesis time is shortened, a large amount of waste generated in the synthesis process is avoided, and the yield of hexafluorodianhydride is also improved.

This invention discloses a polyester cable coated with a polyurethane and rutin composite coating and its preparation method. The method involves coating the surface of a polyester cable with a fluorinated polyurethane and rutin composite coating. The method involves reacting diisocyanate, polyol, and catalyst to obtain a prepolymer, then adding bisphenol AF, a small molecule chain extender, and tetrahydrofuran to obtain a fluorinated polyurethane solution. A rutin solution is prepared and mixed with the fluorinated polyurethane solution to obtain a fluorinated polyurethane and rutin composite material solution. The polyester cable is then immersed in the fluorinated polyurethane and rutin composite material solution, removed, air-dried, and oven-dried. This process is repeated several times to obtain the polyester cable coated with the polyurethane and rutin composite coating. The polyester cable of this invention has UV resistance, seawater corrosion resistance, and marine antifouling properties. The preparation method is simple, and it has broad application prospects in marine engineering, ship mooring, and marine fisheries.

The invention discloses a method for synthesizing high-purity bisphenol AF, which comprises the following reaction steps: taking phenol and hexafluoroacetone trihydrate as raw materials, taking pentacyanocyclopentadiene as a catalyst, and heating and reacting in a protective atmosphere; after the reaction is finished, adding a NaOH aqueous solution into the reaction liquid to adjust the pH to 7, and extracting and separating the liquid by using dichloromethane; and evaporating the dichloromethane extract containing bisphenol AF to dryness to obtain a bisphenol AF crude product, and recrystallizing the bisphenol AF crude product with methyl tert-butyl ether to obtain a bisphenol AF pure product. The catalyst adopted in the invention avoids the defect of insufficient acidity of a conventional catalyst while avoiding a high-corrosivity catalyst, so that the production operation is mild, and the reaction production equipment is conventional. The used catalyst is high in boiling point, stable in structure, capable of being recycled and environmentally friendly, and a new technical method is provided for industrial production of high-quality bisphenol AF.

The application provides a raw material composition of optical glue, the optical glue and a preparation method and application thereof.The raw material composition of the optical glue comprises the following components in parts by weight: 10-25 parts of bisphenol AF epoxy resin; 65-85 parts of fluorine-containing acrylic ester prepolymer; 1-5 parts of silane coupling agent; 0.1-2 parts of cationic photo initiator; and 0.1-2 parts of cationic thermal initiator; wherein the fluorine-containing acrylic ester prepolymer is obtained by reacting fluorine-containing acrylic ester monomers and epoxy acrylic ester compounds under the condition of ultraviolet light irradiation.The optical glue has low refractive index and high light transmittance, is suitable for optical communication, electronic device packaging and the like, meets the requirements of material bonding and high-temperature and high-humidity environment, has interface enhancement, multifunctionality, and low dielectricity, high hydrophobicity and high-temperature resistance.

The invention discloses fluororubber for a puncture-resistant gasket as well as a preparation method and application of the fluororubber, and relates to the technical field of fluororubber gasket preparation. Comprising 100 parts of a fluororubber polymer, 5-8 parts of an acid acceptor, 21-32 parts of a filler, 1-2.5 parts of a cross-linking agent and 0.5-1 part of an accelerant, the cross-linking agent comprises bisphenol AF; the accelerant comprises an accelerant BPP. The gasket prepared from the fluororubber has the advantages that the puncture force is weakened, and the sealing property is higher.

The invention discloses a preparation method of bisphenol AF, and relates to the field of fluorine-containing organic matters. The preparation method comprises the following specific steps: adding hydrogen fluoride, hexafluoropropylene and hexafluoropropylene oxide into a stainless steel reaction kettle 1, heating and carrying out an isomerization reaction to obtain hexafluoroacetone; and 2, introducing the hexafluoroacetone generated in the step 1 into a stainless steel reaction kettle 2, then adding phenol and a catalyst, carrying out a heating reaction, and after the reaction is finished, carrying out rectification to remove hydrogen fluoride and hexafluoropropylene so as to obtain bisphenol AF. The purity and the yield of the bisphenol AF product prepared by the method are improved, and the process economy is effectively improved.

The application discloses a strong-alkali-resistant waterborne industrial paint and a preparation method thereof, and relates to the technical field of paints. In the preparation of the strong-alkali-resistant waterborne industrial paint, epoxy polyorganosiloxane is prepared by reacting polysiloxane and allyl glycidyl ether; pre-modified graphene nanosheets are prepared by reacting graphene nanosheets, glycidyl furfuryl ether and phosphorus-containing furan monomers; modified graphene nanosheets are prepared by reacting the pre-modified graphene nanosheets and 2,4-dihydroxybenzophenone; fluorine-containing epoxy monomers are prepared by reacting bisphenol AF and epichlorohydrin; epoxy resin emulsion is prepared by emulsifying epoxy resin, the fluorine-containing epoxy monomers and the epoxy polyorganosiloxane; and the strong-alkali-resistant waterborne industrial paint is prepared by uniformly mixing the epoxy resin emulsion, the modified graphene nanosheets and a curing agent. The strong-alkali-resistant waterborne industrial paint prepared by the application has excellent strong-alkali resistance, flame resistance and anti-aging performance.

The invention relates to the technical field of films, in particular to a multi-layer composite film which is prepared from at least one layer of a polyaryletherketone material film, at least one layer of a polyimide material film and at least one layer of a bisphenol AF type polyaryletherketone material containing an imide side group or a film of the bisphenol AF type polyaryletherketone material through laminating and hot-pressing compounding. The bisphenol AF type polyaryletherketone material containing the imide side group or the film of the bisphenol AF type polyaryletherketone material is arranged between each layer of polyaryletherketone material film and each layer of polyimide material film; the multilayer composite film formed after lamination has a good interfacial compatibility effect and high peel strength, and can give full play to the advantages of polyaryletherketone and polyimide materials to the greatest extent.

The application discloses a kind of radiation-resistant sealing materials for photoetching process and preparation method thereof, belong to high molecular sealing material technical field.The material is made of fluorine rubber raw rubber, 1-iodine perfluorohexane or 1-iodine perfluorooctane, reinforcing filler, bisphenol AF vulcanizing agent and benzyl triphenyl phosphonium chloride accelerator, etc.According to specific weight part, it is made by batch dropwise mixing and gradual temperature two-step vulcanization.The application utilizes perfluoroalkyl iodide under plasma C-I bond preferentially homolysis generates I·, terminates fluorine rubber free radical chain degradation;And through theoretical calculation and ion chromatography verification, ensure that processing process does not decompose, no corrosive iodine ion release in service.The application breaks the application technology prejudice of halogen, solves the defect that conventional fluorine rubber particle releases high, plasma life is short, avoids the problem that perfluoroether rubber is high in cost and difficult to process, the obtained material is low in particle release amount, long in radiation life, small in compression permanent deformation, adapts to 7nm and below node semiconductor equipment sealing demand, easy to scale up.

The invention provides a phenolic curing agent for a low-gloss epoxy resin powder coating and a preparation method of the phenolic curing agent, and belongs to the technical field of powder coatings. According to the present invention, bisphenol A diglycidyl ether, bisphenol AF, citric acid, 1, 6-hexanediol diglycidyl ether, E-20 epoxy resin, trimethylolpropane triglycidyl ether, 4, 4 '-(1-phenethyl) bisphenol and the like are mainly adopted as raw materials to carry out a reaction so as to obtain the epoxy resin; the finally obtained phenolic curing agent product is obtained by carrying out high-temperature melt blending and re-polymerization on two polymers with different molecular structures, and the final product as the phenolic curing agent and E-12 epoxy resin are subjected to curing activity difference and micro-phase separation effect in the high-temperature curing process, so that the prepared powder coating has the advantages of high-temperature curing property, high-temperature curing property and the like. The self-delustering coating has excellent self-delustering capacity under the condition that a delustering agent is not added, the gloss of a coating film cured at high temperature is low, the surface is flat and smooth, and the properties such as impact resistance, hardness and long-time boiling resistance of the coating film are excellent.

The invention discloses a pentacyanocyclopentadiene supported catalyst and application of the pentacyanocyclopentadiene supported catalyst in bisphenol AF synthesis. The bisphenol AF synthesis steps are as follows: phenol and hexafluoroacetone trihydrate are taken as raw materials, the pentacyanocyclopentadiene supported catalyst is taken as a catalyst, and under the protection of nitrogen, heating and reaction are performed; and after the reaction is finished, cooling to room temperature, filtering and recovering the catalyst, carrying out reduced pressure distillation on filtrate to remove excessive phenol, recrystallizing residues by using an ethanol / water solution, and filtering to obtain bisphenol AF. The pentacyanocyclopentadiene supported catalyst is adopted, the acidity is enhanced through the pi-pi conjugation effect, meanwhile, the stability and recoverability of the catalyst are improved, the activity of the catalyst is high, the yield of bisphenol AF can reach 95% or above, and the purity of bisphenol AF is larger than 99.5%. Meanwhile, the reaction condition is mild, compared with a homogeneous reaction system, the reaction temperature is remarkably reduced, the equipment requirement is low, and the production cost is reduced by 20-30% compared with that of a traditional method.

The invention relates to a medicine sealing plug and a preparation method thereof, the sealing plug comprises a core body, a self-sealing body and a sealing body, a big-end-up conical plug neck is formed at the lower end of the core body, and a big-end-up conical hole is formed in the center of the plug neck; the core body comprises the following components: brominated butyl rubber, white carbon black, dicumyl peroxide, zinc oxide, stearic acid and an amino silane coupling agent; the self-sealing body is cone-shaped so as to be embedded in the cone hole; the self-sealing body comprises the following components: brominated butyl rubber, white carbon black, polyisobutene, sulfur, TBBS, zinc oxide and stearic acid; the sealing body is in a conical sleeve shape so as to be arranged on the plug neck in a sleeving mode. The sealing body comprises fluororubber, white carbon black, a perfluoropolyether plasticizer, bisphenol AF, BPP and a heat stabilizer. And the core body, the self-sealing body and the sealing body are molded and vulcanized.

The invention discloses a synthesis method of 2, 2-bis (4-carboxyl phenyl) hexafluoropropane, which comprises the following steps: by taking bisphenol AF as a raw material, carrying out sulfonylation reaction to obtain a corresponding sulfonate compound, and then carrying out carbonyl insertion reaction to prepare the 2, 2-bis (4-carboxyl phenyl) hexafluoropropane. The synthesis method is simple and easy to operate, high in yield and high in product purity, and can be applied to actual industrial production.

The invention provides a novel cross-linking agent, fluororubber and a preparation method and application thereof, and belongs to the technical field of chemical production. According to the invention, p-hydroxystyrene and perfluoropolyether allyl ether are copolymerized to synthesize a macromolecular cross-linking agent with a poly-p-hydroxystyrene structure, and the prepared macromolecular cross-linking agent is applied to cross-linking of fluororubber for the first time, so that the compatibility of the macromolecular cross-linking agent in the fluororubber is remarkably improved; compared with bisphenol AF, the bisphenol AF crosslinking agent with the structure can effectively increase the elongation at break of fluororubber, and has a good application prospect.

The invention discloses a heat-resistant rubber sealing ring for a pipeline interface and a preparation method thereof. EPDM (ethylene propylene diene monomer) and FKM (fluororubber) are synergistically combined, and performance customization is realized through a differential process by regulating and controlling the proportion, optimizing compatibility and a vulcanization system (dicumyl peroxide, bisphenol AF and TAIC). The heat-resistant rubber sealing ring disclosed by the invention has good mechanical properties and aging resistance in a 130-DEG C hot water environment, the leakage risk is reduced, the maintenance cost and safety accidents are reduced, the continuity of heat supply service is ensured, and the energy-saving and efficient requirements of the heat supply industry are met.