501 results about "Phenolic aldehyde" patented technology

The application discloses a kind of ship super-long anticorrosion special nano powder coating, preparation method and application, belong to ship heavy anticorrosion material technical field.The preparation method of the ship super-long anticorrosion special nano powder coating is as follows: epoxy resin, graphene modified epoxy resin, core-shell structure ZnO@SiO2, modified 2,5-dimercapto-1,3,4-thiadiazole, borosilicate glass powder, flaky boron nitride, silane coupling agent modified silica, phenolic amine curing agent, 2-ethyl-4-methylimidazole, fumed silica, defoaming agent, ultraviolet absorber, high-temperature pigment are put into stirrer and stirred for 20-30min, then melt extrusion is carried out through double screw extruder, the extrusion temperature is 90-110 DEG C, grinds and sieves, and the ship super-long anticorrosion special nano powder coating is obtained.The coating prepared by the application has good anticorrosion performance and can be applied in the field of ship metal surface corrosion protection.

The invention discloses a polyurethane modified epoxy resin adhesive as well as a preparation method and application thereof, and the polyurethane modified epoxy resin adhesive is prepared from the following components in parts by mass: 7-10 parts of E51 type bisphenol A diglycidyl ether, 3.5 parts of a phenolic aldehyde amine T31 curing agent and 1-3 parts of synthetic polyurethane, the synthetic polyurethane is prepared from polyether triol, polyether amine, isophorone diisocyanate and glycerol carbonate, and a blending system of the synthetic polyurethane and bisphenol A diglycidyl ether is adopted to be subjected to covalent crosslinking with phenolic aldehyde amine T31, so that the adhesive has high toughness and strength guarantee; the synthetic polyurethane prepared by the method is obtained through simple, green and efficient solvent-free synthesis, and the synthesized product has certain fluidity at room temperature, so that the subsequent stirring preparation process of an adhesive is facilitated. And a solvent-free synthesis method is adopted, so that the use of a toxic organic solvent in the traditional polyurethane synthesis process is avoided, and the synthesis process is greener.

The invention relates to the technical field of coatings, in particular to a corrosion-resistant coating material and a preparation method thereof. The corrosion-resistant coating material comprises the following components in parts by mass: 80-100 parts of epoxy resin, 5-20 parts of a modified phenolic aldehyde amine curing agent, 2-5 parts of a waterproof agent, 5-10 parts of a corrosion inhibitor and 40-55 parts of a lubricant. The modified phenolic aldehyde amine curing agent is obtained by carrying out Mannich reaction on phenol, thymol, aliphatic polyamine and formaldehyde. The phenol provides a rigid benzene ring structure, and endows a cured product with good heat resistance and chemical resistance. Thymol improves the flexibility and adhesive force of the cured product and enhances the hydrophobicity of the cured product at the same time. The epoxy resin and the modified phenolic aldehyde amine curing agent are polymerized, the waterproof agent, the corrosion inhibitor and the lubricant are wrapped, and the obtained coating material has good adhesive force and corrosion resistance.

The invention relates to a high-strength wear-resistant archaized brick and a preparation method thereof, and belongs to the technical field of archaized bricks, the high-strength wear-resistant archaized brick comprises the following raw materials: 25-30 parts of fly ash, 30-35 parts of superfine slag powder, 30-35 parts of clay, 8-10 parts of coke powder, 10-12 parts of diatomite, 12-15 parts of potassium feldspar, 10-15 parts of a modified binder and 8-12 parts of a reinforcing agent; according to the technical scheme, a polyhydroxy compound is combined with a silanization reinforcing filler, then combined with an anhydride compound and then combined with novolac epoxy resin, then an amine curing agent is added, and curing is conducted to obtain the modified binder; fly ash, superfine slag powder, clay and coke powder are subjected to ball milling, diatomite, potassium feldspar, a modified binder and a reinforcing agent are added, and the high-strength wear-resistant archaized brick is obtained through stirring, calcining and compression molding. The mechanical property, thermal stability and wear resistance of the archaized brick are improved on the whole, the densification degree of the archaized brick is enhanced, and the comprehensive performance is good.

The invention discloses a high-temperature-stripping-resistant epoxy structural adhesive as well as a preparation method and application thereof, and belongs to the technical field of high-performance composite materials. The epoxy structural adhesive comprises bisphenol A type epoxy resin, novolac epoxy resin, polysiloxane-polyurethane modified epoxy resin, core-shell modified epoxy resin, PEEK ultrafine powder and other components, and through mutual cooperation of all the components, the problems that in a high-temperature service environment, the adhesive layer modulus of traditional adhesive is rapidly attenuated, and a bonding interface is prone to failure are solved; the epoxy structural adhesive provided by the invention has both rapid curing and heat resistance, is stable in interface bonding, has the highest modulus of 1.28 GPa at 80 DEG C, the highest peel strength of 7.8 N / mm at 80 DEG C, and a damage mode of cohesion or high-proportion mixed damage, and is especially suitable for structural bonding requirements of harsh scenes such as peripheral structures of automobile engines, high-temperature areas of electronic equipment and the like.

The invention relates to the technical field of functional coatings, in particular to a graphene reinforced heavy-duty epoxy coating for a marine environment. The invention discloses a graphene-based epoxy resin coating which is prepared from the following raw materials in parts by weight: 60-80 parts of bisphenol A epoxy resin, 5-10 parts of aminated graphene-carbon nanotube composite powder, 3-6 parts of zinc-aluminum-cerium ternary composite phosphate, 3-6 parts of nano boron nitride / silicon dioxide core-shell particles, 15-25 parts of a polyamide-epoxy curing agent, 1-3 parts of a silane coupling agent KH-560 and 5-8 parts of cashew nut shell oil modified phenolic aldehyde amine. The anti-rust paint is prepared from the following components in parts by weight: 0.5-2 parts of carboxylated graphene quantum dots, 2-4 parts of organic montmorillonite, 0.1-0.5 part of a fluorocarbon surfactant, 8-15 parts of a composite anti-rust pigment and 10-20 parts of an organic solvent. The coating is excellent in corrosion resistance, capable of resisting marine corrosion for a long time, resistant to high temperature and resistant to cathodic disbonding, has the functions of aging tracing and biological adhesion resistance, is convenient to construct and stable in performance, and provides reliable protection for ocean engineering.

The invention belongs to the technical field of oil field drilling, and particularly relates to a preparation method of modified sulfonated phenolic resin for drilling fluid, and the modified sulfonated phenolic resin is prepared by chemically bonding a functional monomer simultaneously containing sulfonic acid anions and quaternary ammonium cations in a phenolic resin structure in a free radical polymerization mode. The quaternary ammonium cation group adsorbs negatively-charged clay particles, the adamantyl group can be adsorbed in hydrophobic areas of the clay particles through association, and the sulfonated phenolic resin can be quickly adsorbed on the surface of the clay in a double adsorption mode of hydrogen bonds and electrostatic attraction. Besides, a large number of sulfonic acid anions can form a compact solvation layer after hydration, and a compact coating film can be formed when phenolic resin is quickly adsorbed on the surface of clay, so that the clay is prevented from being in contact with water, the stability of clay particles is realized, a compact mud cake can be formed, and the prepared phenolic resin has good filtrate loss reduction performance.

The invention discloses a lignin-based epoxy anticorrosive paint and a preparation method thereof. The anticorrosive paint is prepared by mixing a lignin-based epoxy anticorrosive paint component, a lignin-based phenolic amine curing agent and a diluent. According to the lignin-based epoxy anticorrosive paint disclosed by the invention, on one hand, a lignin epoxy resin acetylation modification method based on lipase is introduced, and the content of hydrophilic groups is reduced, so that formation of a compact lignin cross-linked network structure is promoted, and the barrier ability, heat resistance and aging resistance of an anticorrosive coating on a chemical medium are improved on the resin level; on the other hand, lignin and furfural are respectively used for partially replacing phenol and paraformaldehyde to prepare a lignin-based phenolic aldehyde amine curing agent with high chemical inertness, so that the protection effect of a coating in an extreme corrosion environment and the adhesive force to a metal base material are improved on the curing agent level. The lignin-based epoxy anticorrosive paint prepared by the invention has good corrosion resistance, aging resistance, thixotropy and adhesive force.

The invention discloses an anti-oxidation and anti-scouring heat prevention and insulation composite material, a preparation method and application, and belongs to the technical field of high-temperature thermal protection materials. According to the method, a two-step in-situ modification method is adopted, hydrolyzed organosilane reacts with phenolic resin to prepare silicon modified phenolic resin, then the silicon modified phenolic resin is bonded with an organoboron compound to obtain boron-silicon co-modified phenolic resin, a curing agent is added, then the boron-silicon co-modified phenolic resin is injected into a fiber reinforcement mold, and a finished product is obtained through a sol-gel reaction and normal-pressure drying. According to the invention, boron and silicon elements are embedded into phenolic aldehyde molecular chains through covalent bonds to form a boron-silicon-carbon hybrid network, a nano ceramic phase and a compact glassy protective layer are generated at high temperature, and the coating has excellent anti-scouring property, thermal stability and heat insulation property. The preparation process is simple and controllable, is suitable for large-scale production, can accurately regulate and control the performance, and is suitable for thermal protection parts of supersonic aircrafts.

The present invention relates to a preparation method for a silicon-carbon composite negative electrode material, comprising the following steps: (P1) co-polymerization: co-dissolving an unsaturated organic acid, an acrylate monomer and an acrylamide monomer in water at a specific ratio, and co-polymerizing same under the action of a sacrificial agent of a saturated organic acid and an initiator to obtain a suspension containing an acrylic copolymer; (P2) alkali treatment: performing an alkali treatment and filtration on the suspension to obtain copolymer particles; (P3) in-situ polymerization: performing in-situ polymerization of phenolic aldehyde on the surfaces of the copolymer particles to obtain a composite resin of a phenolic aldehyde-coated acrylic copolymer; (P4) heat treatment: performing a heat treatment on the composite resin in an oxidizing gas atmosphere to obtain porous carbon; and (P5) performing silicon deposition and carbon coating on the porous carbon to obtain the silicon-carbon composite negative electrode material. When the silicon-carbon composite negative electrode material prepared in the present invention is used in a lithium battery, the volume expansion of silicon can be effectively relieved, and the cycling performance and charge-discharge capacity of a lithium-ion battery are improved.

The embodiment of the invention provides a plastic-coated steel pipe and a plastic coating process thereof, and relates to the technical field of plastic-coated steel pipes. The plastic-coated steel pipe comprises a steel pipe base body, a metal transition layer, an inner anticorrosive coating, a fiber reinforced winding layer and an outer protective coating are sequentially arranged on the outer surface of the steel pipe base body from inside to outside, and the metal transition layer is a nickel-chromium-aluminum-yttrium alloy layer and is formed on the surface of the steel pipe base body through a supersonic plasma spraying process. And the inner anticorrosive coating is formed by a mixture of bisphenol F type epoxy resin and novolac epoxy resin, and is doped with silicon nitride and zirconium oxide composite nanoparticles subjected to surface treatment. By arranging a multi-stage composite structure of the metal transition layer, the high-temperature-resistant anti-corrosion coating, the fiber reinforcement layer and the self-repairing outer layer and arranging the detachable heat insulation sheath, the interface bonding strength, heat resistance, mechanical damage resistance and corrosion resistance of the plastic-coated steel pipe are improved; and the service life of the composite material in high-temperature, strong-corrosion and complex construction environments is effectively prolonged.

The invention discloses a method for preparing a porous carbon material by recycling coal gasification slag and semi-coke wastewater, which comprises the following steps: by taking coal gasification fine slag as a carrier and semi-coke wastewater as a phenol source, carrying out flotation-acid leaching modification on the fine slag to purify a carbon-rich component and optimize the surface adsorption activity of the carbon-rich component; then fully adsorbing phenolic substances in the wastewater by utilizing the modified slag body; introducing a composite aldehyde cross-linking agent, and initiating an in-situ phenolic aldehyde polymerization reaction to generate a composite precursor; the precursor is subjected to high-temperature carbonization and alkali activation pore forming, and finally the porous carbon material with the characteristics of high specific surface area, rich graded pores and low ash content is prepared. According to the process, full-amount collaborative recycling of the two wastes is achieved, and the process is green and free of secondary pollution. The obtained material is high in carbon content and rich in defect structure and surface functional groups, shows excellent adsorption capacity and catalytic carrier performance, can be widely applied to the fields of deep purification of water pollutants, adsorption of volatile organic compounds, energy catalysis and the like, and has remarkable environmental protection benefits and resource economic values.

A preparation method of the cardanol-based phosphorus-containing side group novolac epoxy resin comprises the following steps: (1) in the presence of a catalyst A, carrying out a stirring reaction on cardanol and an aldehyde compound at 80-110 DEG C for 3-10 h to prepare an intermediate A; (2) stirring the intermediate A and a phosphorus-containing compound at 50-150 DEG C to react for 10-24 hours to prepare an intermediate B; and (3) in the presence of a catalyst B, stirring and reacting the intermediate B and epichlorohydrin at 70-110 DEG C for 2-6 hours, and in the presence of a catalyst C, stirring and reacting at 30-65 DEG C for 1-4 hours to prepare the cardanol-based phosphorus-containing side group novolac epoxy resin. Through a rigid structure on a main chain of the novolac epoxy resin, a phosphorus-containing structure on a side chain of the novolac epoxy resin and an epoxy group, the toughness and flame retardance of an epoxy cured product can be improved on the premise that the thermal stability is not reduced, and the novolac epoxy resin has an extremely good application research prospect.

The invention relates to a high-heat-resistance and high-insulation two-component epoxy resin adhesive and application thereof, and belongs to the technical field of epoxy resin. The technical problem to be solved by the invention is to provide the high-heat-resistance and high-insulation two-component epoxy resin adhesive. The adhesive comprises a component A and a component B. The component A comprises bisphenol A epoxy resin, novolac epoxy resin, silicon carbide whiskers, potassium titanate fibers, boron phenolic resin and modified nano boron nitride. The component B is prepared from methylhexahydrophthalic anhydride, methyl tetrahydrophthalic anhydride, 2-phenylimidazole, modified aluminum oxide, polyimide micro powder and modified wollastonite. Through synergism of multiple materials, balance of heat conduction, insulation, mechanical strength and thermal stability of the adhesive is realized. Under high-frequency pulse voltage, the adhesive is long in electrical aging life. A gradient curing process is adopted for curing, complete reaction in each stage is guaranteed, and internal stress is reduced. The process fault tolerance is high, the environment compatibility is high, the cost is low, and the curing time is short.

The invention discloses an ultrathin rigid phenolic aerogel heat insulation sheet and a preparation method thereof, and belongs to the field of heat insulation materials. The preparation method comprises the following steps: firstly, impregnating a fibrofelt in a sodium silicate-based rigidifying solution, and carrying out mould pressing and drying to form a self-supporting rigid framework; then, the framework is soaked in a phenolic aerogel precursor solution, curing, washing and drying are carried out, and framework pores are filled with phenolic aerogel; and finally compounding the hot melt adhesive film. According to the preparation method, through the specific process sequence of first rigidifying and then compounding, the problems that a traditional aerogel material is poor in rigidity and prone to pulverization, and a silicon dioxide-based material is insufficient in ultra-high-temperature ablation resistance are successfully solved, and the thickness of the obtained heat resisting sheet is 0.1-5 mm; the composite material has excellent rigidity (the compression strength is greater than 2MPa when the deformation quantity is 5%), low heat conductivity coefficient (0.02-0.045 W / (m.K)) and excellent 1200 DEG C high-temperature flame ablation resistance, and is especially suitable for thermal protection in limited spaces such as new energy batteries and the like.

The invention relates to the technical field of high polymer materials, in particular to a method for improving the heat resistance of melamine phenolic resin by using phthalonitrile, which comprises the following steps: uniformly mixing phthalonitrile resin powder and melamine phenolic resin powder at room temperature, and then curing and molding the uniformly mixed powder at 200-280 DEG C to obtain the heat-resistant melamine phenolic resin. The melamine phenolic aldehyde-nitrile group copolymer resin is obtained. According to the method for obtaining the melamine phenolic-nitrile resin with high thermal stability, high wear resistance and high mechanical property through copolymerization, not only can the thermal stability of the resin be greatly improved, but also the mechanical property can be enhanced, and the processing window of the melamine phenolic resin can be widened.

The invention provides metal-hydrogen modified porous carbon and a preparation method thereof, a silicon-carbon composite material and a preparation method thereof, and a battery, and the preparation method of the metal-hydrogen modified porous carbon comprises the following steps: mixing an aldehyde compound, a phenolic compound, a metal source and a catalyst, and carrying out heating treatment to prepare modified phenolic resin; carrying out carbonization treatment on the modified phenolic resin to prepare metal-doped porous carbon; mixing the metal-doped porous carbon with a metal hydride reducing agent, and performing reduction treatment to prepare metal-hydrogen modified porous carbon; wherein the mass ratio of metal elements to phenolic compounds in the metal source is (2-5): 100. A proper amount of metal-hydrogen bonds are introduced into the inner surface of a porous carbon pore structure; when the porous carbon is subsequently subjected to silicon deposition, low-temperature, uniform and confined deposition of nano silicon in a porous carbon matrix is facilitated, and the silicon-carbon composite material with low expansion rate and excellent electrochemical performance is prepared.

The invention belongs to the technical field of coating materials, and particularly relates to an ablation-resistant anti-aging coating on the surface of an aircraft and a preparation method of the ablation-resistant anti-aging coating. A silane coupling agent containing an epoxy group and vinyl and boric acid are used as raw materials, an organic silicon-boron hybrid oligomer with a Si-O-Si and Si-O-B bond stereo structure is obtained by adjusting the ratio of the silane coupling agent to the boric acid and serves as a bridge, and phenolic resin, hydrogen-containing silane and vinyl silicone rubber are combined together to form the ablation-resistant anti-aging coating. Wherein an epoxy group and a phenolic hydroxyl group are subjected to a condensation reaction, vinyl and a platinum catalyst form a compact cross-linked structure through hydrogen-containing silane, and the obtained coating has a lower ablation rate, better anti-UV weather resistance and higher flexibility, is suitable for long-time protection of the surface of an aircraft, and has a better ablation protection effect under shear airflow impact.

This application provides a glass fiber surface treatment agent, its preparation method, glass fiber, fabric, and their applications. The glass fiber surface treatment agent comprises an effective component and water, with a solid content of 5.8–10.5%. The effective component, by weight percentage, includes: a coupling agent of 7.3–17.3%, a penetrant of 0.3–2.8%, a lubricant of 7.7–13.2%, a film-forming agent of 58.3–81.9%, a toughening agent of 0.4–1.8%, and additives of 2.4–6.6%. The film-forming agent comprises film-forming agent A and film-forming agent B. Film-forming agent A is a composition of phenolic epoxy emulsion and bisphenol A type epoxy emulsion, and film-forming agent B is an alicyclic epoxy resin emulsion. Glass fibers produced using this glass fiber surface treatment agent exhibit excellent bundle properties, wear resistance, and weaving performance. The glass fiber fabric undergoes rapid and complete static impregnation in epoxy resin, resulting in high mechanical strength and meeting the performance requirements of new energy vehicle battery casings.

The invention relates to the technical field of carbon material preparation, in particular to phenolic resin-based porous carbon and a preparation method thereof. The core of the preparation method of the phenolic resin-based porous carbon is that the mass ratio of phenolic aldehyde to phenolic aldehyde is optimized (1: (1-1.2)) to ensure sufficient crosslinking, and an amine catalyst is selected to reduce metal residues; meanwhile, terephthalaldehyde is introduced as a cross-linking accelerant, so that the bridging density and thermal stability of a resin network are effectively enhanced, and structural collapse is inhibited in subsequent carbonization; a sectional type carbonization process is further adopted, and the carbon skeleton is preserved by controlling the heating rate. According to the method, the carbonization yield is finally and successfully improved to 58% or above (improved by 15%-20% compared with that of a traditional method), the ash content is remarkably reduced (smaller than or equal to 0.2%), and an excellent material with a small mesoporous structure (the average pore diameter ranges from 2 nm to 10 nm) and a high specific surface area (larger than or equal to 1500 m < 2 > / g) is obtained.

The invention relates to the technical field of coating preparation, and provides a super-hydrophobic oleophobic epoxy anticorrosive wear-resistant powder coating and a preparation method thereof. According to the coating, phenolic epoxy resin and bisphenol A epoxy resin are used as matrix resin, phenolic hydroxyl resin is used as a curing agent, super-hydrophobic / oleophobic carbon nanotubes are used as a modifier, ethylene-tetrafluoroethylene copolymer and polyamide resin are used as flexibilizers, super-hydrophobic / oleophobic nano silicon dioxide powder and super-hydrophobic hollow glass beads are used as fillers, and the super-hydrophobic / oleophobic nano silicon dioxide powder and the super-hydrophobic hollow glass beads are used as fillers. The super-hydrophobic and oleophobic epoxy anti-corrosion wear-resistant powder coating is prepared by taking an inorganic pigment as a coloring agent through the steps of material preparation, premixing, melt extrusion, tabletting, cooling, crushing and sieving under the cooperation of various functional assistants. The powder coating is subjected to electrostatic spraying (40-70 KV), the coating film thickness is about 350 microns, and the powder coating is cured into a film after being subjected to hydrophobic / oleophobic min at 180 DEG C / 5 min or 230 DEG C / 1.5 under the baking condition of 180 DEG C / 5 min. The contact angles of oil drops and water drops can reach 160 degrees and 161 degrees respectively, and the rolling angles are 2 degrees and 1 degree respectively.

The invention discloses high-temperature-resistant high-purity low-chlorine epoxy resin and a preparation method thereof. On one hand, the high-purity low-chlorine epoxy resin resistant to high temperature is provided, the high-purity low-chlorine epoxy resin is prepared by curing an epoxy resin base material through a composite curing agent, and the epoxy resin base material is prepared from, by mass, 100 parts of low-chlorophenyl multifunctional epoxy resin and 12-20 parts of epoxy silicon resin; the composite curing agent comprises the following raw material components in parts by mass: 100 parts of a DDS curing agent, 30-40 parts of a bio-based phenolic aldehyde amine curing agent and 6-12 parts of boron modified phenolic resin. On the other hand, the invention provides a preparation method of the high-temperature-resistant high-purity low-chlorine epoxy resin. The epoxy resin material disclosed by the invention has relatively high glass transition temperature, relatively excellent high-temperature resistance and high-temperature aging resistance, low moisture absorption rate and excellent electrical insulation performance.

This invention discloses a bio-based flame-retardant thermally expanding powder coating and its preparation method, relating to the field of coatings. It comprises the following components: bio-based epoxy resin, phenolic epoxy curing agent, ammonium polyphosphate, nano-titanium dioxide, zinc borate, expanded graphene, 8-12 parts of imidazole, benzoin, and a leveling agent. The bio-based epoxy resin is prepared by ring-opening copolymerization of cashew phenol glycidyl ether and linoleic acid prepolymer, followed by epoxy end-capping, with an epoxy equivalent of 900-1200 g / eq; the phenolic epoxy curing agent has an epoxy equivalent of 200-250 g / eq; and the expanded graphene has an initial expansion ratio of 200-300 times. The preparation method employs a two-step, staged mixing process. This invention, while maintaining zero VOC in powder coatings and the same film thickness, achieves for the first time the outstanding performance of 6H hardness, UL94V-0 flame retardancy, and 120 times expansion ratio through the systematic synergy of high epoxy equivalent bio-based resin, four-component complete flame retardant system, specific EG:APP ratio, and two-step process.

The application discloses a preparation method and application of a phenol oil-based phase separation phenolic aerogel, and belongs to the field of high-value utilization of coal tar. The preparation method of the phase separation phenolic aerogel comprises the following steps: taking melamine foam as a skeleton, phenol oil, phenols and aldehydes as raw materials, mixing different polar organic matters as solvents, and taking acid as a catalyst to perform a solvothermal reaction to obtain a phase separation phenolic organic gel; and vacuum drying is performed to obtain the phase separation phenolic aerogel. The phase separation phenolic aerogel with adjustable porosity and connectivity can be obtained by adjusting the polarity and ratio of the mixed solvents, and the aerogel can be used for solar-driven interfacial water evaporation. In the application, phenol oil is used to replace phenols to prepare the phenolic aerogel with high connectivity, the raw material cost is reduced, the utilization value of the phenol oil is improved, the operation is simple, complex freeze drying and template adjustment pores are not needed, and the application prospect of the phenol oil in solar-driven interfacial water evaporation is good.

The invention belongs to the technical field of organic synthesis and separation, and particularly relates to a method for synthesizing phenolic resin from 2, 4 / 2, 5-methyl ethyl phenol. The invention provides a method for synthesizing phenolic resin from 2, 4 / 2, 5-methyl-ethyl phenol, which comprises the following steps: adding 2, 4 / 2, 5-methyl-ethyl phenol, aldehydes and a catalyst into a reactor, carrying out an anti-thermal insulation reaction, sampling and analyzing until the content of 2, 5-methyl-ethyl phenol is less than or equal to 0.5% and is qualified, heating, decompressing and dehydrating, steaming out unreacted 2, 4-methyl-ethyl phenol and water, and dehydrating to 100-200 DEG C to obtain linear 2, 5-methyl-ethyl phenolic resin; adding a catalyst into the steamed material, heating to completely react the reacted 2, 5-methyl ethyl phenol (when formaldehyde in the steamed material is insufficient, a small amount of formaldehyde can be supplemented), adding a non-water-soluble solvent for extraction and layering, and treating a water layer in a wastewater treatment workshop; and rectifying the oil layer to obtain 99% 2, 4-methyl ethyl phenol or pesticide intermediate 4-ethyl-2-cresol.

The present application belongs to the technical field of protective coating, and relates to a protective coating with reverse enhanced adhesion, a preparation method and application thereof. The protective coating is composed of component A and component B. The preparation raw materials of component A include water-based epoxy resin emulsion, cashew phenol glycidyl ether, wetting penetrant and defoaming agent. The preparation raw materials of component B include phenolic amine curing agent, alicyclic amine curing agent, dopamine, 2,4,6-tris(dimethylaminomethyl)phenol and pigment filler. The dopamine and the phenolic amine curing agent and the alicyclic amine curing agent are grafted under the action of 2,4,6-tris(dimethylaminomethyl)phenol to form a modified curing agent. The coating has low requirements for surface treatment, high adhesion in dry and humid environments and presents the characteristics of "reverse enhanced adhesion".

The utility model relates to a cooling device for phenolic moulding plastics, which comprises a workbench, a conveying module, a cooling box, a first cooling assembly and a second cooling assembly, the cooling box comprises a first cooling cavity, a second cooling cavity, an inlet and an outlet, and the first cooling assembly and the second cooling assembly are respectively arranged in the first cooling cavity and the second cooling cavity. The cooling box is provided with a water storage chamber, the second cooling assembly comprises a water pump, a lower connecting pipe, an upper connecting pipe, a water tank and a plurality of spray heads, a plurality of first through holes are formed in the cooling box in a penetrating mode, the workbench is provided with second through holes, the number of the sealing plugs is the same as that of the first through holes, and the sealing plugs are inserted into the corresponding first through holes. And each sealing plug is connected with the cooling box in a buckling manner. With the adoption of the scheme, the cooling device for the phenolic moulding plastic has the advantage that water sprayed out of each spray head can enter the water tank again to be recycled by detaching each sealing plug after cooling is completed.

The invention belongs to the technical field of biodegradable composite materials, and discloses a preparation method and application of a PVA-PLA (Polyvinyl Acetate-Poly Lactic Acid) multi-layer high-barrier film based on metal-phenolic network enhancement. The preparation method comprises the following steps: firstly, preparing a PVA (Polyvinyl Alcohol) composite solution containing lignin and a polyphenol compound, and carrying out film casting to obtain a base layer film; then preparing a PLA coating solution containing Femetal ions; and finally, immersing the base layer film into the PLA coating liquid, and constructing a multi-layer structure through solvent volatilization. The core of the invention is that a polyphenol compound in the base layer and Fe in the PLA layer are utilized to form a metal-phenolic aldehyde network coordination bond at an interface, and the metal-phenolic aldehyde network coordination bond is used as a molecular bridge, so that the interface bonding force between PVA and PLA is greatly enhanced, and the problem of interface layering caused by polarity difference between PVA and PLA is effectively solved. Meanwhile, due to the synergistic effect of the lignin and the polyphenol compound, the film is endowed with excellent oxygen, carbon dioxide and water vapor barrier properties and an antibacterial function. The film is green and safe, and is suitable for active packaging of food, especially fresh keeping of fruits and vegetables.

The application belongs to the technical field of rubber mats, and provides a high-damping low-dynamic-static-ratio vibration and noise reduction rubber mat, a preparation method and application thereof, raw materials including, by mass fraction, natural rubber 25-50 parts, halogenated butyl rubber 45-65 parts, epoxy natural rubber 6-12 parts, reinforcing agent 40-50 parts, brominated p-t-octylphenol formaldehyde vulcanized resin 9-15 parts, zinc oxide 4-6 parts, stearic acid 1-3 parts, antioxidant 3.4-4.5 parts, silane coupling agent 3-5 parts, accelerator 4-5 parts, and sulfur 0.8-1.2 parts. The rubber mat has high-frequency high-damping low-dynamic-static-ratio characteristics and excellent fatigue resistance.