34 results about "O-Cresol" patented technology

The application belongs to the field of functional material preparation and catalysis technology, and discloses a preparation method of an iron oxide catalyst, which comprises the following steps: dissolving an iron precursor and a promoter in water respectively to form uniform aqueous solutions; mixing the two aqueous solution systems and stirring to make them uniformly mixed; continuously heating and stirring the mixed aqueous solution to evaporate water; drying the gel-like substance, and then calcining at a specified temperature for 5h to obtain the iron oxide catalyst. The method of the application obtains the iron oxide catalyst with high catalytic performance by calcining the mixture of the promoter and the iron precursor, and uses the iron oxide catalyst to catalyze the methylation reaction of phenol and methanol. The application improves the conversion rate and selectivity of the reaction by improving mass transfer, increasing the specific surface area and the content of acid sites, and has the advantages of simple operation, good repeatability, low cost, phenol conversion rate of 94.4%, product 2,6-dimethylphenol selectivity of 50.1%, and o-cresol selectivity of 49.2%.

This invention discloses an ultrathin flame-retardant halogen-free epoxy fiberglass sheet and its preparation method, belonging to the technical field of epoxy fiberglass materials. The preparation process includes preparing a resin solution by mixing phosphorus-containing epoxy resin, bisphenol A phenolic epoxy resin, o-cresol phenolic epoxy resin, benzoxazine resin, phosphorus-containing phenolic flame-retardant curing agent, toughening agent, catalyst, coupling agent, and a mixed solvent. Composite fillers and flame-retardant synergists are added, and the mixture is dispersed at high speed and then impregnated with fiberglass cloth. After drying, a semi-cured sheet is obtained, which is then stacked and hot-pressed to obtain the finished product. Compared with existing technologies, the ultrathin fiberglass sheet obtained by this invention meets the UL94 V-0 halogen-free flame-retardant standard, has a high glass transition temperature, and maintains excellent electrical insulation performance and dimensional stability even at ultrathin thicknesses. During processing, the resin flow is uniform and there is no bubble delamination. This sheet is environmentally friendly and halogen-free, with excellent comprehensive performance, and is suitable for automotive insulation, electronic packaging, and printed circuit boards.

The invention discloses a preparation method and a preparation system of p-chloro-o-cresol, and the preparation method comprises the following steps: 1) adding dichloroethane into molten o-cresol, and adding a catalyst; (2) controlling the temperature to be 5-15 DEG C, and adding sulfuryl chloride into the material in the step (1) at different feeding speeds according to the reaction time and the reaction stage; and (3) after the reaction is finished, rectifying and purifying liquid of reaction materials to obtain the p-chloro-o-cresol. According to the present invention, the process is simple, the reaction condition is mild, the reaction is controlled, the selectivity is high, the ortho-cresol is subjected to preferential para-position chlorination, the reaction is sufficient, the selectivity is high, the polychlorination phenomenon is avoided, the phenol content and the isomer content in the crude product are low, the yield is high, and the large-scale production is easily achieved.

The application relates to a preparation method and application of a Ni / C catalyst, in particular to application of the Ni / C catalyst in hydrogenation of o-cresol into o-methylcyclohexanol, and belongs to the technical field of preparation of catalytic hydrogenation catalysts. The Ni / C catalyst used in the reaction system is obtained through one-step pyrolysis by taking Ni-BTC as a self-sacrificial template. The preparation raw material of the Ni / C catalyst is extensive, the price is low, the whole catalyst preparation process is simple, convenient and controllable, and the Ni / C catalyst is suitable for large-scale preparation. The Ni / C catalyst with high catalytic activity and selectivity is in-situ formed through pyrolysis at a lower temperature, the catalyst stability is very good, no obvious deactivation phenomenon is generated after 7 cycles of reaction, and the catalyst is easy to be separated through magnetic adsorption after the catalytic reaction is completed due to the magnetism of the catalyst, and the catalyst is convenient to recycle.

The invention discloses a preparation process of industrial-grade o-methylhydroquinone, and relates to the technical field of production of o-methylhydroquinone, o-cresol, a supported palladium-copper bimetallic catalyst, potassium carbonate and a solvent are added into a reaction kettle, oxygen is introduced for a reaction, a reaction liquid is cooled, hydrogenation reduction is performed, crystallization is performed, and an o-methylhydroquinone product is obtained. The method is high in yield and environment-friendly, and the production cost is reduced.

The present application relates to the technical field of epoxy encapsulation material, and particularly relates to a low-stress and low-hygroscopicity epoxy resin composition and application thereof. The low-stress and low-hygroscopicity epoxy resin composition is prepared from the following components: epoxy resin, phenolic resin, inorganic filler, colorant, release agent, curing accelerator, ion capture agent and coupling agent; the epoxy resin is composed of o-cresol formaldehyde type epoxy resin and branched diphenyl sulfide epoxy resin, wherein the branched diphenyl sulfide epoxy resin is obtained by crosslinking 4,4'-dihydroxydiphenyl sulfide, inositol and epichlorohydrin; by adding the branched diphenyl sulfide epoxy resin in the epoxy resin composition, the mechanical properties and water absorption of the epoxy resin composition are significantly improved, thereby improving the stability and reliability of the product, and the epoxy resin composition can be used for packaging of small and thin integrated circuits.

The invention provides a positive photosensitive resin composition, a resist film, a resist underlayer film, and a resist permanent film. The invention provides a positive photosensitive resin composition which is capable of obtaining a resist film with excellent developability, chemical resistance and heat resistance, and has good storage stability and thick film forming property. A positive photosensitive resin composition containing the following components (A) to (D): (A) a novolac phenolic resin having an acetal group-based protecting group, containing a phenol structural unit (a1) derived from m-cresol and / or o-cresol and an aldehyde structural unit (a2) derived from salicylaldehyde / (B) a polyhydroxystyrene having an acid-dissociable protecting group / (C) a photoacid generator / (D) a solvent.

This invention relates to a catalyst for preparing ortho-methylated products of phenol. The catalyst is a composite oxide containing indium oxide, with the composition In₂O₃ / X, where X is a promoter. The promoter is selected from one or more of ZrO₂, HfO₂, ZnO, Cr₂O₃, CeO₂, and MgO, and the amount of the promoter metal is 0.01 to 100 times the molar amount of indium. This invention also discloses the application of this catalyst in the reaction of carbon dioxide hydrogenation coupled with phenol methylation to prepare o-cresol and 2,6-dimethylphenol. Compared with traditional catalytic methods, the catalyst of this invention has low energy consumption, long service life, and can highly selectively convert phenol to o-cresol and 2,6-dimethylphenol with almost no byproduct formation.

The invention discloses a phenol separation coupling catalysis purification method, and relates to the technical field of fine chemical separation and purification. According to the method, a metal oxide modified H-ZSM-5 molecular sieve is used as a catalyst, a coupling reaction and a separation process are carried out in a catalytic rectifying tower, and two core processes are synchronously completed: 1, impurities such as phenol and o-cresol in raw materials are subjected to a targeted O-alkylation reaction with methanol, and the impurities difficult to separate are efficiently converted into an alkylate easy to rectify; and 2, precise fractionation is synchronously realized, heavy ether products are extracted and removed from a side line, and target products mainly comprising high-purity 2, 6-xylenol and 2, 4-xylenol are obtained in a tower kettle. Through integrated design of targeted conversion and synchronous separation, key impurities are removed with high selectivity, the process is simplified, equipment investment and energy consumption are reduced, non-target side reactions are avoided, and high selectivity, high yield, process economy and product quality of target xylenol are considered.

The invention belongs to the technical field of organic synthesis, and particularly relates to fludioxonil and a synthesis method thereof, and the synthesis method of fludioxonil comprises the following steps: synthesizing 3-methyl salicylaldehyde by using o-cresol; the method comprises the following steps: oxidizing 3-methyl salicylaldehyde into 3-methyl catechol; 3-methyl catechol is used for synthesizing methyl benzodioxole; chloridizing methyl benzodioxole to obtain a first intermediate; performing fluorine-chlorine exchange on the first intermediate to obtain a second intermediate; preparing a reaction solution by using the second intermediate, and performing electro-catalysis on the reaction solution to obtain a third intermediate; synthesizing a cinnamate intermediate by using the third intermediate; and synthesizing fludioxonil by using the cinnamate intermediate. According to the synthesis method, butyl lithium is not used as a catalyst, synthesis conditions are mild and easy to control, the product yield and purity are high, and the whole synthesis process is clean and safe.

The application discloses a catalyst for synthesizing 2,6-dimethylphenol and a preparation method thereof, and relates to the technical field of organic synthesis catalysis. The catalyst comprises a composite catalytic system and an active component loaded in the composite catalytic system. The composite catalytic system is a mixed filler of cerium modified molecular sieves and molecularly imprinted polymers. The active component is a combination of iron salt and magnesium salt. The catalyst for synthesizing 2,6-dimethylphenol and the preparation method thereof can greatly improve the yield of 2,6-dimethylphenol through synergistic catalysis of the iron salt and the magnesium salt, shape selection and screening of the cerium modified molecular sieves and synergistic effect of the molecularly imprinted polymers, and is significantly superior to traditional catalysts. The selectivity of 2,6-dimethylphenol is significantly improved through the shape selection of the cerium modified molecular sieves and the selective adsorption of the molecularly imprinted polymers on o-cresol.

The invention relates to high-performance modified o-cresol formaldehyde resin as well as a preparation method and application thereof. The preparation method adopts a step-by-step polymerization and molecular design strategy, takes organic acid as a catalyst, performs controllable polycondensation by adding formaldehyde in batches and introducing a molecular weight regulator (such as phenol and p-tert-butylphenol), and finally stabilizes the tail end of a molecular chain by adopting an end capping technology. The method successfully synthesizes the modified o-cresol formaldehyde resin with high ortho-position structure content and narrow molecular weight distribution (the molecular weight distribution index PDI is less than or equal to 2.0). When epoxidation is carried out by using the epoxy resin as an intermediate, the reaction efficiency is high, side reactions are few, and the obtained epoxy resin shows the excellent characteristics of high epoxy value and low hydrolyzed chlorine. The finally cured product shows higher glass transition temperature, lower water absorption, improved toughness and excellent dielectric properties, and comprehensively meets the harsh requirements of high-end electronic packaging materials, copper-clad plates and high-performance composite materials on heat resistance, reliability and electrical insulation.

The invention discloses a high-temperature-resistant insulating material for a new energy battery and a preparation method of the high-temperature-resistant insulating material, and relates to the technical field of high polymer materials. The method comprises the following steps: firstly, carrying out phosphorus modification on o-cresol formaldehyde epoxy resin and DOPO, then reacting with KH-560 to prepare an active compatibilizer, and powdering; then carrying out surface passivation, silicon dioxide coating, calcination and titanate coupling treatment on aluminum nitride to obtain an AlN-coated SiO2 composite filler; then carrying out surface modification on the filler through aminated hyperbranched polysiloxane and nano boron nitride to construct an interface buffer layer; finally, polyetherimide, an active compatibilizer, the modified filler and an antioxidant are blended, extruded and subjected to heat treatment. According to the method, through multi-scale synergistic modification, the high-temperature stability and long-term heat-resistant cycle performance of the material are remarkably improved, and the method is suitable for the field of new energy battery insulation.

The invention discloses an epoxy resin composition for an LNG (Liquefied Natural Gas) storage tank supporting seat and a preparation method thereof, and the epoxy resin composition is prepared from the following raw materials in parts by weight: 40 parts of bisphenol A epoxy resin, 4-15 parts of tetraglycidyl diaminodiphenyl methane, 7-22 parts of o-cresol formaldehyde epoxy resin, 4-10 parts of a latent curing agent, 0.2-1 part of an accelerant, 1.5-5 parts of hollow light filler, 0.15-0.5 part of a coupling agent and 0.5-5 parts of a toughening agent. And 1.5 to 3 parts of a surfactant. The epoxy resin composition disclosed by the invention has relatively high compression strength, bending strength and impact strength and relatively low heat conductivity coefficient at room temperature and minus 163 DEG C, can resist the ultimate temperature of 300 DEG C or above within 10 minutes, and is an excellent polymer composite material for manufacturing the LNG storage tank supporting seat.

The application provides a preparation method of o-sec-butyloxytoluene, comprising the following steps: performing catalytic reaction on o-cresol and sec-butanol under the action of a catalyst to obtain o-sec-butyloxytoluene; the catalyst comprises a carrier and at least two metal elements loaded on the carrier; the carrier comprises microporous molecular sieve and mesoporous molecular sieve. The o-sec-butyloxytoluene can be effectively prepared by using the preparation method, and the environment is friendly.

The invention provides an electrochemical reactor and a synthesis method of o-cresol. The electrochemical reactor comprises an anode, a cathode and a reaction layer, the material of the anode is M-LDH (at) C; the material of the cathode is S-rGO / CeO2; wherein M represents a composite metal and comprises an alloy formed by any two of the following metal elements: nickel, iron, zinc, manganese, cobalt, palladium, platinum or ruthenium. The method can solve the problems of low synthesis efficiency and low product selectivity of phenol electrochemical alkylation in the prior art, and is suitable for the field of electrochemical catalysis.

The invention provides corrosion-resistant high-power-density high-temperature-resistant ceramic slurry and a preparation method thereof, and belongs to the field of inorganic non-metallic materials. The invention provides corrosion-resistant high-power-density high-temperature-resistant ceramic slurry. The corrosion-resistant high-power-density high-temperature-resistant ceramic slurry is prepared from the following raw materials in parts by weight: 15-25 parts of reduced graphene oxide, 45-50 parts of o-cresol formaldehyde epoxy resin, 6-8 parts of a curing agent, 2-4 parts of a dispersing agent, 3-5 parts of a silane coupling agent, 20-25 parts of a solvent and 4-6 parts of functional filler. The volume resistivity of the paste is 1 * 10 <-3 >-5 * 10 <-3 > omega.cm, the power density is greater than or equal to 10W / cm < 2 >, long-term stable heat tracing at 300 DEG C is realized, no obvious corrosion is caused in a 1000h salt spray test, and the adhesive force and the thermal cycling stability are excellent.

This invention discloses a low-warpage solder resist ink material, its preparation method, and its application, belonging to the field of ink material preparation technology. It addresses the technical problem that the anti-shrinkage and anti-warpage properties of existing ink materials need further improvement. Specifically, it comprises the following components by weight: 30-50 parts alkali-soluble modified resin, 15-20 parts shrinkage-modified filler, 2-5 parts photoinitiator, 0.5-3 parts pigment, 1-3 parts leveling agent, and 15-25 parts solvent. This invention involves preparing negative thermal expansion nano-zirconium tungstate, coating it with polydopamine, grafting photosensitive double bonds to obtain an anti-shrinkage filler, esterifying o-cresylaldehyde epoxy resin with acrylate, and then modifying it with a dibasic anhydride to obtain an internally plasticized resin. Finally, the components are premixed under yellow light and water-cooled three-roll milling to obtain a low-warpage solder resist ink, which not only improves the anti-shrinkage and anti-warpage properties of the ink material but also enhances its mechanical properties.

The present application relates to the technical fields of semiconductor packaging injection molding, in particular to a low-temperature fast-curing epoxy resin composition for injection molding and a preparation method thereof, which comprises at least o-cresol formaldehyde epoxy resin, dicyclopentadiene phenol epoxy resin, phenol-aralkyl curing agent, imidazole curing agent, coupling agent, release agent, colorant and silicon dioxide. By optimizing the compound selection of epoxy resin and curing agent, the provided epoxy resin composition has lower packaging injection molding temperature and shorter packaging injection molding time by using o-cresol formaldehyde epoxy resin, dicyclopentadiene phenol epoxy resin, phenol-aralkyl curing agent and imidazole curing agent through low-temperature mixing process, effectively meeting the new demands of the semiconductor packaging industry.

This application relates to the field of chemical synthesis technology and discloses a continuous preparation process for p-chloro-o-cresol with low isomer content. The process involves preparing a catalyst mother liquor by constant-temperature stirring of anhydrous ferric chloride, a thioether ligand, and 1,2-dichloroethane solvent. The catalyst mother liquor, o-cresol, and 1,2-dichloroethane solvent are added to a reaction vessel with controlled initial temperature. Thionyl chloride is added dropwise in three stages using variable frequency technology. In the third stage, external circulation is activated, and the reaction solution, after cooling and pressurization, flows into a Venturi jet injector, where it undergoes shear mixing with the thioether chloride and is then refluxed. The reaction solution is then sent to a degassing vessel for bottom heating and gas purging, while the top is washed with a countercurrent spray of 1,2-dichloroethane. The discharged mixed gas is then subjected to high-silica hydrophobic H-ZSM-5 molecular sieve to retain organic solvent, and the crude product is purified by vacuum distillation. This invention utilizes the steric hindrance effect of the thioether ligand to improve para-selectivity, combined with Venturi jet injection to eliminate local overheating, reduce isomer content, and minimize solvent loss.

The invention belongs to the technical field of electronic materials, and particularly relates to black insulation resistance ink and a preparation method thereof.The black insulation resistance ink comprises bisphenol A epoxy resin, phenoxy resin, o-cresol formaldehyde epoxy resin, a benzoxazine curing agent, a compound solvent, a latent curing agent, black pigment, functional filler, auxiliaries and a conductive inhibitor, the black insulation resistance ink meets 350-mesh screen printing, and adopts a gradient heating curing process. According to the invention, a synergistic curing mechanism of benzoxazine, o-cresol formaldehyde epoxy resin (OCFEN) and latent imidazole is combined, low-temperature pre-curing and high-temperature compact crosslinking are realized through a gradient heating process, and process adaptability and material performance are considered at the same time.

The application discloses a high-temperature-resistant insulating material for new energy batteries and a preparation method thereof, and relates to the technical field of high polymer materials.The method comprises the following steps: first, modifying o-cresol formaldehyde epoxy resin with DOPO, and then reacting the modified o-cresol formaldehyde epoxy resin with KH-560 to obtain an active compatibilizer and powderize the active compatibilizer; then, performing surface passivation, silica coating, calcination and titanate coupling treatment on aluminum nitride to obtain an AlN@SiO2 composite filler; then, performing surface modification on the filler by using an aminated hyperbranched polysiloxane and nano boron nitride to construct an interface buffer layer; finally, blending, extruding and heat-treating polyetherimide, the active compatibilizer, the modified filler and an antioxidant. The method is suitable for the insulating field of new energy batteries, and the high-temperature stability and long-term heat cycle performance of the material are significantly improved through multi-scale synergistic modification.

This invention discloses an epoxy molding compound for chip packaging based on spherical silicon oxide, belonging to the field of epoxy molding compound technology. The epoxy molding compound of this invention, by weight, comprises 200-300 parts spherical silicon oxide, 30-60 parts high-temperature resistant epoxy resin, 30-80 parts curing agent, 4-12 parts diluent, 0.6-1.5 parts curing accelerator, and 4-9 parts coupling agent. The high-temperature resistant epoxy resin has an epoxy functionality of 8, providing a large number of epoxy groups, which readily forms a three-dimensional structure with high cross-linking density. Combined with the naphthalene ring backbone and imide ring structure, it exhibits excellent thermal stability and mechanical properties, and its coefficient of thermal expansion is significantly lower than that of o-cresyl formaldehyde epoxy resin. It also has higher flexural strength, making it more suitable for high-performance epoxy resin-based electronic packaging materials.

The invention provides a bacillus soralensis strain, a compound bacterium thereof and application of the bacillus soralensis strain in tobacco mellowing, the bacillus soralensis strain DQ-3-2-7 is preserved in the China General Microbiological Culture Collection Center on November 20, 2023, the preservation number is CGMCC No.29072, and the preservation address is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing. The bacillus sorola DQ-3-2-7 strain can alcoholize tobacco leaves, so that volatile compounds are remarkably changed, the flower fragrance, radix aucklandiae and ketone compounds related to sweet and fruit fragrance are remarkably increased, and meanwhile, the flower fragrance type compounds are increased; irritant substances such as acetic acid and o-cresol are reduced, so that the whole flavor is more coordinated, and the quality of the tobacco leaves is remarkably improved; meanwhile, when the strain containing the bacillus sorola DQ-3-2-7 and the pseudomonas Hunan are used for fermentation, the tobacco leaf quality improvement effect is better. The bacillus sorola DQ-3-2-7 strain and the compound bacteria can be applied to the surface of tobacco shreds to alcoholize tobacco leaves, so that the flavor of the tobacco leaves is improved, and the quality of the tobacco leaves is improved.

The invention belongs to the technical field of high polymer material synthesis, and particularly relates to polyether type furfural-based resin as well as a preparation method and application thereof. The preparation method of the polyether type furfural-based resin comprises the following steps: carrying out mixed reaction on o-cresol, furfural and an alkaline aqueous solution to obtain pre-condensed o-cresol-furfural resin; carrying out mixed reaction on the precondensed o-cresol-furfural resin and a formaldehyde aqueous solution to obtain hydroxymethylated resin; and mixing the hydroxymethylated resin with an etherification reagent and an acid catalyst for reaction to obtain the hydroxymethylated etherification resin. Tests prove that the content of free formaldehyde and free furfural in the prepared polyether furfural-based resin is lower than 0.1 wt.%, the content of free o-cresol is lower than 1 wt.%, the polyether furfural-based resin belongs to environment-friendly resin with low VOC (volatile organic compound) emission, and the prepared resin has excellent flexibility, adhesive force and hardness, can be used as a film-forming substance of an environment-friendly coating, and can be used as a film-forming material of the environment-friendly coating. The coating is especially suitable for a protective coating of a metal substrate.

The invention relates to the technical field of epoxy resin compositions, in particular to an epoxy resin composition suitable for rectifier bridge packaging and a preparation method of the epoxy resin composition. The adhesive comprises the following components in percentage by weight: 10-20% of epoxy resin, 5-10% of a curing agent, 0.05-0.8% of a release agent, 0.05-0.8% of a coupling agent, 0.05-0.8% of a coloring agent, 0.05-0.8% of a catalyst and the balance of silicon dioxide, the epoxy resin comprises o-cresol formaldehyde type epoxy resin and dicyclopentadiene type epoxy resin; in the preparation process of the epoxy resin composition, the epoxy resin and the release agent are mixed for ball milling pretreatment, so that the continuous molding property can be improved; a low-temperature mixing technology (the mixing temperature is 80-100 DEG C) is adopted, so that acetone insoluble substances in the resin composition are effectively reduced.

The application provides a preparation method of a wafer-level chip packaging structure and an easy-to-grind epoxy functional film, and relates to the technical field of chip packaging.The easy-to-grind epoxy functional film comprises, in mass fraction, 10-15 parts of phenoxy resin, 10-15 parts of o-cresol type phenolic epoxy resin, 1-4 parts of carboxyl-terminated butylnitrile rubber, 15-20 parts of latent curing agent, 1-3 parts of accelerator, 50-52 parts of angular silicon micro powder and 2 parts of carbon black; wherein the molecular weight of the phenoxy resin is 30000-35000; the epoxy functional film has improved grinding efficiency by using the phenoxy resin and the o-cresol type phenolic epoxy resin as the base resin, the angular silicon micro powder as the filler, and in combination with the carboxyl-terminated butylnitrile rubber, the latent curing agent and the accelerator, so that the working requirements of the automatic film laminator and the grinding machine are met, thereby improving the production efficiency.

The present application relates to a kind of high hardness, the polyester resin for powder coating with excellent adhesion, which uses the raw material polymerization obtained including o-cresol formaldehyde epoxy resin by-product, xylene, isobutyric anhydride, adipic acid, terephthalic acid, tetraethylene glycol, phenyl succinic anhydride.In the preparation of polyester resin, the functionality is higher, and has the structure of o-cresol formaldehyde epoxy resin, as 70 / 30 polyester resin product for indoor powder coating is used, the final coating not only has high hardness, but also has excellent adhesion, other conventional performance such as coating appearance, impact resistance, gloss, etc. can also meet the requirements, at the same time, the high value-added comprehensive utilization of o-cresol formaldehyde epoxy resin by-product is realized, and has excellent economic and environmental value.

The invention relates to a method for synthesizing high-carbon phenolic resin and extracting ortho-position and para-position alkylphenol, which is applied to the technical field of organic synthesis and separation and comprises the following steps: taking phenol or phenol and ortho-cresol-containing mixed phenol as a first component and at least one of various alkylphenols selected from coal chemical industry crude phenol rectification products as a second component, carrying out segmented polymerization reaction with aldehyde and a catalyst; controlling the reaction until the content of meta-position phenol is less than or equal to 1% and the content of free phenol is 5-30%, and steaming out unreacted phenol; carrying out secondary polymerization and solvent extraction on the distillate, and rectifying to obtain a product containing high-purity phenol and a plurality of ortho-position and para-position alkylphenols; and dehydrating the resin phase to obtain the high-carbon-content phenolic resin. According to the method, petrochemical phenol is partially replaced with cheap coal-based phenol, various high-added-value alkylphenols are co-produced while high-performance phenolic resin is synthesized, and high-value utilization of resources and cost reduction and efficiency improvement of the process are achieved.

The invention discloses high-strength high-temperature-resistant precoated sand and a production process, and relates to the technical field of precoated sand, the high-strength high-temperature-resistant precoated sand comprises the following raw materials by weight: 100-110 parts of crude sand, 7-9 parts of o-cresol formaldehyde epoxy resin, 3-5 parts of modified SBS, 1.5-2.5 parts of a functional curing agent, 4-5 parts of a lubricant, and 1-3 parts of a silane coupling agent. The compatibility of the modified SBS and the o-cresol formaldehyde epoxy resin is enhanced, and in the process of improving the toughness of the o-cresol formaldehyde resin, the tensile strength, heat resistance and the like are improved. The temperature of the used functional curing agent for curing the o-cresol formaldehyde epoxy resin is low, the manufacturing cost of the precoated sand is reduced, and after the o-cresol formaldehyde epoxy resin is cured, the prepared precoated sand is endowed with high weather resistance.