26 results about "Benzole" patented technology

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

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

The application discloses a preparation method of dibenzoyl peroxide, and relates to the technical field of organic peroxide preparation. The preparation method comprises the following steps: preparing dibenzoyl peroxide crude product and initial synthesis obtained recycling mother liquor; taking out two parts from the initial synthesis obtained recycling mother liquor, and reacting with a sodium hydroxide solution, hydrogen peroxide, a surfactant aqueous solution and benzoyl chloride; at least the benzoyl chloride is contained in the multiple materials, and the multiple materials are pre-mixed by a pre-mixer; heat preservation reaction is carried out, and after the reaction is completed, centrifugal separation is carried out to obtain the dibenzoyl peroxide crude product and second synthesis obtained recycling mother liquor; and the dibenzoyl peroxide crude product is sequentially subjected to water washing and solid-liquid separation to obtain a finished product. The pre-mixer is used to realize instant super-uniform mixing of the materials, the reaction is more uniform, the product is fine and small in particle size, the particle size distribution is uniform, the reaction yield is high, the amount of water used for subsequent washing is reduced, the recycling of the mother liquor reduces the discharge amount of high-salinity organic waste liquid from the source, and the preparation cost is reduced.

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

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

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

The application discloses a method for preparing 2-chloro-4-(1H-pyrazol-3-yl)benzonitrile and relates to the technical field of 2-chloro-4-(1H-pyrazol-3-yl)benzonitrile. A clear hot-solvent pretreatment liquid is formed; a homogeneous supersaturated mother liquor is obtained; a high-activity primary crystal seed suspension is constructed; the remaining main body liquid stream of the supersaturated mother liquor is subjected to nonlinear programmed cooling pretreatment, so that the remaining main body liquid stream enters a phase diagram metastable zone but maintains a stable state without spontaneous nucleation, and a metastable nucleation precursor liquid is formed; and high-purity and uniform-crystal 2-chloro-4-(1H-pyrazol-3-yl)benzonitrile finished products are prepared. The application can extract an absolutely homogeneous and extremely low-impurity pretreatment liquid, and significantly improves the purity standard and optical transmittance of a subsequent crystallization mother liquor.

This invention discloses a method for the dehydration cyclization of 6-hydroxyhexanoic acid to synthesize ε-caprolactone. The method includes the following steps: adding 6-HA, H-ZSM-5 catalyst, and benzonitrile solvent to a reactor, reacting at 170-210℃ for 6-10 h under mechanical stirring, directly obtaining ε-CL in one step; wherein the material ratio is: 0.013-0.065 g of catalyst per 1 mmol of 6-HA. This invention solves the problem of harsh reaction conditions (vacuum environment) in current ε-CL synthesis routes, providing a more practical and easily scalable technical solution for the industrial production of ε-CL.

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

This invention provides a method for preparing androstane-3,6,17-trione (E,Z)-3-[O-(2-aminoethyl)]oxime hydrochloride, comprising the following steps: benzophenone oxime reacts with 2-chloroethylamine hydrochloride in dimethyl sulfoxide, followed by acid-base adjustment, toluene extraction, hydrolysis with concentrated hydrochloric acid to remove the protecting group, and crystallization to obtain high-purity 2-aminoethylamine hydrochloride; androstane-3,6,17-triol is used as a raw material and oxidized under the catalysis of sodium bromate and ruthenium oxide (IV), quenched, separated, washed with water, and crystallized by solvent replacement with isopropanol to obtain androstane-3,6,17-trione; the 2-aminoethylamine hydrochloride solution is mixed and reacted with the trione in tetrahydrofuran solution at low temperature, followed by salting out, filtration, separation, washing with saturated brine and drying with magnesium sulfate, and purification by solvent replacement, water dissolution and concentration, and cooling crystallization to obtain the high-purity target product. This invention significantly improves the yield of the target product by optimizing reaction conditions, while achieving readily available raw materials, low cost, and industrialized production through traditional chemical reaction pathways.

The application discloses a preparation method of a heat-resistant high-filling epoxy copper-clad plate material and belongs to the technical field of copper plate materials. After mixing boron nitride and carbon nanotubes, ball milling is assisted to peel and modify the surface by using glycine to obtain amino acid modified hybrid fillers; a trifunctional bio-based epoxy resin is synthesized by using trans-resveratrol as raw material; a multifunctional benzoic acid ester type active ester curing agent is prepared by reacting 1,6-dihydroxynaphthalene with benzoyl chloride. The amino acid modified hybrid fillers, the trifunctional epoxy resin, the multifunctional benzoic acid ester type curing agent and 2-ethyl-4-methyl imidazole are prepared into a high-filling impregnation liquid, a low-dielectric glass fiber cloth is impregnated, pre-cured, and then heat-pressed and cured in a vacuum condition in multiple temperature rising stages to obtain the copper-clad plate. The application effectively solves the technical problems of insufficient heat dissipation and large signal loss in the high-frequency and high-speed application of the traditional epoxy copper-clad plate.

The application relates to the technical field of compound synthesis, and particularly discloses a preparation method of an intermediate of toripalimab citrate, which comprises the following steps: a first reaction of cinnamyl alcohol and diethyl phosphite in an organic solvent to obtain a first reactant; and a second reaction of the obtained first reactant, alkali and 4-[2-(N,N-dimethylamino)ethoxy]benzophenone to obtain a second reactant containing the intermediate I of toripalimab citrate. A brand-new process route is developed, raw materials used in the route are all easy to obtain, the whole reaction route is short, operation is simple, reaction conditions are mild and safe, the yield of the obtained intermediate I of toripalimab citrate is high, the purity is also high, the total yield is more than 80%, the purity is more than 99.9%, and industrialized production can be realized.

The application relates to the technical field of material preparation, and particularly relates to a method for preparing fluorobenzene through photocatalytic fluorination based on nitrogen trifluoride. The method for preparing fluorobenzene through photocatalytic fluorination based on nitrogen trifluoride provided by the application adds pretreated benzoyl chloride into a closed pressure-resistant quartz photo-reactor, replaces the air in the reactor with high-purity argon to form an oxygen-free inert atmosphere, adds pretreated nitrogen trifluoride into the reactor, and stirs the reaction under the conditions that the temperature is 60-150 DEG C, the pressure is 0.1-0.4 MPa, and the molar ratio of benzoyl chloride to nitrogen trifluoride is 1:0.5-6; a UV light source module is started, and the reaction system is irradiated with UV light with a wavelength of 200-300 nm to perform photocatalytic reaction, so that fluorobenzene is obtained, one-step efficient synthesis of fluorobenzene is realized, traditional high-toxicity fluorine sources are replaced by nitrogen trifluoride, the safety is high, the reaction conditions are mild, the process steps are simplified, the product has high purity and good yield, the amount of waste is small, and the product is easy to be industrially produced.

The present application relates to the technical field of anchoring agent, in particular to a chemical expansion anchoring agent for soft rock roadway surrounding rock and a preparation method thereof, the chemical expansion anchoring agent comprises resin mud glue and curing agent; the resin mud glue comprises low-curing unsaturated polyester resin, low-shrinkage additive, filler, accelerator and expansion agent; the curing agent comprises peroxi-benzoyl, chlorinated benzene, diphenyl and benzene; the low-curing unsaturated polyester resin contains styrene derivative, and the introduced polymer microgel can improve the compressive strength; the low-shrinkage additive is prepared by modifying and coating calcium sulfate whisker with sodium oleate, and a double bond is introduced on the surface of the low-shrinkage additive, so that the shrinkage rate is reduced. The chemical expansion anchoring agent for soft rock roadway surrounding rock prepared by the present application can be combined with the anchor rod cable as a whole in the soft and broken surrounding rock drilling, so that the anchor rod cable is stably anchored in the soft and broken surrounding rock, and strong technical support is provided for the support of soft rock roadway surrounding rock.

The application discloses a benzophenone derivative containing a hindered phenol structure for a light stabilizer and a preparation method thereof. The benzophenone derivative containing the hindered phenol structure is represented by a general formula (I), wherein n is an integer of 1-10. The benzophenone derivative containing the hindered phenol structure of the application has both benzophenone and hindered phenol structures, so that the molecular weight of the light stabilizer is increased, and the heat oxidation resistance, compatibility and extraction resistance of the light stabilizer are enhanced. The application further discloses a preparation method of the benzophenone derivative containing the hindered phenol structure for the light stabilizer.

This invention discloses a polyurethane material for tires and its preparation process, belonging to the technical field of polyurethane materials. The polyurethane material, by weight, comprises the following raw materials: 10-20 parts of polyurethane prepolymer A, 50-60 parts of polyurethane prepolymer B, 1-5 parts of UV absorber, 0.5-2 parts of furfuryl glycidyl ether, and 1-3 parts of chain extender. Polyurethane prepolymer A is obtained by polymerizing a Schiff base-containing diol with a benzene ring-containing diisocyanate; polyurethane prepolymer B is obtained by polymerizing adipic acid polyester polyol with carbodiimide-modified diphenylmethane diisocyanate; and the UV absorber is obtained by a substitution reaction between 2,4-dihydroxybenzophenone and diphenyldichlorosilane. This invention prepares a polyurethane material by simultaneously adding a UV absorber and furfuryl glycidyl ether, and then mixing and crosslinking polyurethane prepolymer A and polyurethane prepolymer B. This polyurethane material possesses excellent UV resistance.

The application discloses a method for synthesizing benzyl sulfoxide by selectively oxidizing benzyl sulfide, belongs to the technical field of fine organic synthesis, and can solve the problems of a long synthesis process, complex catalyst preparation and long reaction time in the synthesis of benzyl sulfoxide at present. The method uses benzyl sulfide as raw material, uses ozone as an oxidant, introduces tert-butyl alcohol as an inhibitor to control the reaction process, and uses ethyl acetate as a reaction solvent, and benzyl sulfoxide is prepared through selective oxidation. The innovative process has the advantages of mild process conditions, environmental friendliness, no need to add any catalyst and high product yield. The method has great potential and value in the industrial application field.

The application discloses a preparation method of dimethylphenylsulfonium triflate, and the preparation method is that benzyl sulfide and methyl triflate are used to synthesize dimethylphenylsulfonium triflate, and then dimethylphenylsulfonium triflate products are obtained through crystallization, filtration, washing and drying, the molar ratio of benzyl sulfide and methyl triflate is 1:1.3-1.5; the prepared product sample has a purity of 99.89%, the content of metal impurities is controlled to be within 60 ppb, and only two kinds of impurities are detected, in addition, the prepared sample is more conducive to obtaining ultrahigh-purity products, and further recrystallization can obtain ultrahigh-purity products with a purity of more than 99.96% and metal impurities within 40 ppb.

This application discloses a method for synthesizing 2,4,5-trifluorophenylacetic acid, belonging to the field of organic chemical technology. Using 1,2,4-trifluorobenzene as a raw material, it reacts with tetrachloromethane and boehmite-passivated aluminum chloride to generate 2,4,5-trifluoro-(trichloromethyl)benzene. After the reaction, the oil phase is separated and extracted. An aqueous solution of zinc chloride is added dropwise to the oil phase, causing the 2,4,5-trifluoro-(trichloromethyl)benzene to hydrolyze to generate 2,4,5-trifluorobenzoyl chloride. Then, azidomethane and silver oxide are added, and the acyl chloride is converted to a carboxylic acid using the Arndt-Eistert reaction to generate 2,4,5-trifluorophenylacetic acid. This synthetic route is simple to operate and streamlined, reducing the use of highly toxic intermediate raw materials, exhibiting low corrosivity and risk to equipment, reduced byproduct generation, and easier separation. It is a safer, more environmentally friendly, and highly selective route for synthesizing 2,4,5-trifluorophenylacetic acid.

The application discloses a wear-resistant and flame-retardant cloth wire and a preparation method thereof, and relates to the technical field of power cables. The application comprises a copper conductor and an insulation layer. The insulation layer is made of mixing materials, and the mixing materials comprise the following raw materials in mass parts: 1000-1100g parts of wear-resistant and toughening masterbatch, 3-3.4 parts of p-hydroxyanisole, 160-175 parts of flame-retardant crosslinking agent, 12-13 parts of photoinitiator 184, and 12-13 parts of benzophenone. The wear-resistant and toughening masterbatch comprises the following raw materials: high-density polyethylene resin, antioxidant 1010, antioxidant 168, dilauryl thiodipropionate, synergistic microspheres, crosslinking aid, and hydroxymethylpropane trimethyl acrylate. In the application, the introduction of the flame-retardant crosslinking agent, the synergistic microspheres and other raw materials effectively improves the flame retardance, wear resistance, crack resistance and low-temperature resistance of the crosslinked polyethylene-based insulation layer. Therefore, the application has a more extensive application prospect.

The present application relates to the technical field of anchoring agent, and particularly relates to a waterproof anchoring agent for water-containing soft rock and a preparation method thereof, the waterproof anchoring agent comprises A component and B component, the A component comprises resin mortar, accelerator and coupling agent, the resin mortar comprises modified unsaturated polyester resin, calcium carbonate, dolomite and mica powder, the modified unsaturated polyester resin comprises palmitoleic acid monoglyceride and conjugated triene pyridine; the B component comprises benzoyl peroxide, chlorobenzene, diphenyl and polyether polyol, the polyether polyol is prepared by ring-opening polymerization of bisphenol A introduced into propylene oxide; the waterproof anchoring agent prepared by the present application overcomes the problems that the anchorage cable body and the traditional resin anchoring agent have low bonding stiffness and are easy to slide and deform in the mudified roadway, so that high pre-tightening force cannot be applied, the utilization rate of the anchorage cable is low, and the anchorage cable cannot realize efficient control of the deformation of the roadway surrounding rock; the waterproof anchoring agent can be used for efficient anchoring of the anchorage cable in the mudified roadway surrounding rock.

The application discloses a kind of high-strength weather-resistant drum flat cable, belong to drum flat cable technical field.The cable includes multiple twisted copper conductor, inner insulation layer, filling reinforcing layer and weather-resistant outer sheath layer;Inner insulation layer is mainly with PVC resin, and filling reinforcing layer is glass fiber rope;Weather-resistant outer sheath layer includes self-made weather-resistant additive.The weather-resistant additive is prepared by three-step reaction, simultaneously contains triazine, thiophene and benzophenone group in molecule, the synergistic effect of three, widen ultraviolet absorption range, reduce the risk of light fatigue, significantly improve weather resistance, and rigid aromatic heterocyclic structure enhances high-temperature thermal stability.The cable of the application has high strength and excellent weather resistance, can adapt to harsh mechanical environment and outdoor high temperature strong ultraviolet and other complex climate conditions, effectively avoids sheath cracking, insulation damage and thermal aging problems, prolongs service life, and guarantees electrical safety.