114 results about "Benzil" patented technology

A polishing slurry containing a slurry dispersing particles of tetravalent metal hydroxide in a medium therein and an additive, characterized in that the additive is a polymer containing at least one kind of monomer component selected from a group of monomers represented with a general formulae (I) and (II) below (In the general formulae (I) and (II), R1 denotes hydrogen, a methyl group, a phenyl group, a benzil group, a chlorine group, a difluoromethyl group, a trifluoromethyl group or a cyano group, R2 and R3 denote hydrogen or an alkyl chain having 1 to 18 carbon atoms, a methylol group, an acetyl group or a diacetonyl group, and a case where both are hydrogen is not included. R4 denotes a morpholino group, a thiomorpholino group, a pyrrolidinyl group or a piperidino group.) The invention provides a polishing slurry in which particles form a chemical reaction layer with a polishing film to be removed with a very small mechanical action of the particles and mechanical removal by a pad without scratches and the additive realizes high planarity.

The invention discloses a photoinitiator containing asymmetric hexa-aryl diimidazole and a preparation method thereof. The invention mainly solves the problems that a photoinitiator containing symmetric hexa-aryl diimidazole is not sensitive to long-wave ultraviolet light and visible light during a photo-curing process; and the residual photoinitiator is migrated to the surface of photoresist material after photo-curing to form an atomization phenomenon, thereby impacting the quality, and production, use environment and the like of a photoresist product, and restricting the application of the photoinitiator in the field of microelectronic material. The preparation method adopts the main raw materials of 3, 4-dialkoxy benzaldehyde, benzaldehyde, and the benzaldehyde having the substituent of fluorine or chlorine atoms. The photoinitiator containing asymmetric hexa-aryl diimidazole is obtained through a plurality of synthesis steps such as benzoin synthesis, benzyl synthesis, and the like. The alkoxy and fluorine or chlorine atoms with higher activity are introduced into the asymmetric hexa-aryl diimidazole to improve the solubility of the photoinitiator. In addition, the photoinitiator has good absorption of ultraviolet light and visible light, reconditions and improves the production and application environment of the photoresist product, and reduces the emission of pollutants.

A flame-retardant UV curing coating is prepared from the following raw materials in part by weight: 10-12 parts of trimethylol propane triacrylate, 50-55 parts of polyester acrylate, 3-5 parts of isopropanol, 5-8 parts of ethoxylated trimethylolpropane triacrylate, 1-2 parts of tetrabutylphosphonium chloride, 2-3 parts of sodium thiocyanate, 2-6 parts of hexabromocyclododecane, 3-4 parts of diethylene glycol butyl ether, -5 parts of benzil dimethyl ketal, 2-3 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 3-4 parts of dispersing auxiliary agent and 4-5 parts of dispersing auxiliary agent. The flame-retardant UV curing coating has excellent chemical resistance and low temperature resistance, and has strong adhesion to difficultly-adhered substrates, such as plastic; after addition of the dispersing auxiliary agents, the flame-retardant UV curing coating is good in leveling property, can form a uniform and thin coating layer, and is high in curing speed; and by adding tetrabutylphosphonium chloride and the hexabromocyclododecane, the flame-retardant UV curing coating has excellent flame retardance.

The present invention relates to a bifunctional catalyst and an application of the bifunctional catalyst in preparation of benzil by benzoin dehydrogenation / oxidation. According to the catalyst, an anion exchange resin or a cation exchange resin is adopted as a carrier; a variable-valence transition metal or a rare earth metal element is bonded on the carrier in a chemical bonding manner, whereinthe binding amount of the variable-valence transition metal or the rare earth metal element is 0.5-10% of the weight of the catalyst; the metal element on the carrier is bonded with an acidic ion exchange resin or an alkaline ion exchange resin through chemical bonds, wherein the metal element on the carrier is adopted as an oxidation catalyst; under a certain reaction condition, benzoin is subjected to a dehydrogenation / oxidation process, hydroxyl is transformed into carbonyl, and the measured water is generated. The catalyst has the following advantages that: the use conditions are mild, the product is easy to separate, the catalyst can be used many times, and the like.

The invention provides an ultraviolet curing coating and a preparation method thereof. The ultraviolet curing coating is prepared from, by weight, 30-80 parts of UV resin, 3-15 parts of a photoinitiator and 5-30 parts of monomers, wherein the UV resin is selected from one or more of bisphenol A epoxy acrylic resin, polyester acrylic resin, polyurethane acrylic resin and organic silicon resin, the photoinitiator is selected from one or more of an aromatic ketone photoinitiator, an alpha-hydroxy ketone derivative, benzil, an acyl phosphorus oxide photoinitiator and an acyl phosphorus oxide derivative, and acrylic monomers and / or modified acrylic monomers are adopted as the monomers. Compared with the prior art, the ultraviolet curing coating has the advantages that the specific photoinitiator can be motivated to be decomposed into free radicals under LED irradiation, the free radicals interact with the UV resin and the monomers to be subjected to a cross-linking reaction to enable the ultraviolet curing coating to be cured, and meanwhile an obtained coating film is higher in flatness, capable of resisting scraping, better in flexibility and higher in hardness.

The invention discloses a synthetic method of benzil and derivatives thereof. The diphenylacetylene compound shown in formula I is used as the raw material and is subjected to reaction in a CH3CN / H2O solvent in the presence of a copper catalyst / select flour oxidant system, so as to obtain the benzil derivatives shown in formula II. The synthetic method disclosed by the invention has the advantages of cheap and easily available catalyst, available oxygen source, environment protection, moderate reaction condition, convenient operation and the like, and the functional groups have good universality.

The invention belongs to the technical field of chemical product preparing method, especially a 2-methyl-3-phenyl benzylalcohol preparing method, comprising the main steps of: 1) using 2, 6-dichlorotoluene to make one-step formatting reaction in tetrahydrofuran solvent and then reacting with benzene bromide under the action of catalyst to produce an intermediate 3-chloro-2-methylbiphenyl; 2) making the intermediate perform two-step formatting reaction in tetrahydrofuran solvent and then directly reacting with dimethylformamide to produce 2-methyl-3-phenyl benzaldehyde; 3) reducing 2-methyl-3-phenyl benzaldehyde with metal reducer to produce course 2-mehtyl-3-phenyl benylalcohol; and 4) refining the course product with methanol, alcohol, toluene, activated carbon, etc and obtaining the finished product. And it is convenient to operating, beneficial to large-scale industrialized production, produces fewer three wastes and has advantages of high product yield and good product purity.

A polishing slurry containing a slurry dispersing particles of tetravalent metal hydroxide in a medium therein and an additive, characterized in that the additive is a polymer containing at least one kind of monomer component selected from a group of monomers represented with a general formulae (I) and (II) below (In the general formulae (I) and (II), R1 denotes hydrogen, a methyl group, a phenyl group, a benzil group, a chlorine group, a difluoromethyl group, a trifluoromethyl group or a cyano group, R2 and R3 denote hydrogen or an alkyl chain having 1 to 18 carbon atoms, a methylol group, an acetyl group or a diacetonyl group, and a case where both are hydrogen is not included. R4 denotes a morpholino group, a thiomorpholino group, a pyrrolidinyl group or a piperidino group.) The invention provides a polishing slurry in which particles form a chemical reaction layer with a polishing film to be removed with a very small mechanical action of the particles and mechanical removal by a pad without scratches and the additive realizes high planarity.

The invention belongs to the technical field of preparation of benzyl and provides a method for preparing benzil by performing catalytic oxidation on benzoin. According to the method, oxygen or air serves as an oxidizing agent, a composite catalyst consists of two components, namely vanadium oxide and nitrous acid ester, and the benzyl is prepared by performing catalytic oxidation on the benzoin at 60 to 120 DEG C. Compared with the stoichiometric chemistry oxidation methods such as traditional chromate oxidation method, the nitric acid oxidation method and the permanganate oxidation method, the method has the following advantages: the reaction condition is mild, the catalyst is cheap and efficient, the reaction is green and environment-friendly, the conversion rate of the benzoin is high,the selectivity of the benzyl is high, and good application prospect and high practical value are achieved.

The invention discloses a method for restraining space charge of a high voltage direct current cable by using a benzil derivative. The method comprises the following main steps: putting low density polyethylene, an antioxidant, a cross-linking agent and 4,4'-bis(dimethylamino)benzil into an internal mixer according to the mass ratio of 100 to 0.1 to 2 to 0.5, and fully mixing the materials at thetemperature of 110 DEG C to obtain a banburying mixture; preheating and fully melting; carrying out sufficient cross-linking; keeping the pressure unchanged to enable a cross-linked polyethylene sample to be naturally cooled to room temperature and taking out the sample for pressing; putting the pressed sample into a vacuum chamber for drying. The method for restraining the space charge of the high voltage direct current cable by using the benzil derivative, disclosed by the invention, has the advantages that injection and accumulation of the space charge in XLPE are significantly restrained and the dissipation of the space charge in the XLPE is accelerated.

The invention relates to a high-glossiness flame-retardant UV (Ultraviolet)-curable coating material. The high-glossiness flame-retardant UV-curable coating material is prepared from the following raw materials in parts by weight: 35-40 parts of polyester acrylate, 8-11 parts of tetrahydrofuran acrylate, 5-9 parts of ethoxylated nonylphenol acrylate, 3-5 parts of triethyl citrate, 5-8 parts of carbic anhydride, 1-3 parts of nano calcium carbonate, 2-3 parts of benzil dimethyl ketal, 10-15 parts of glycol ethyl ether acetate, 6-9 parts of glycol, 5-9 parts of lauryl acrylate, 4-5 parts of auxiliaries and 5-7 parts of red phosphorus master batch. The UV coating material disclosed by the invention has the advantages of good toughness and difficulty in cracking; through adding nano calcium carbonate, the thermal deformation temperature and stability of the coating material are improved, and the glossiness is good; the coating material further has good flame retardance; due to the auxiliaries, the dispersity of the coating material is improved, the leveling property is good, and a coating layer is smooth and bright.

The invention is a method of making 4-methyl fluorobenzoic alcohol, made by using 4-substituted methyl tetraflurobenzoic alcohol through hydrogenation-reduction reaction.

The invention discloses UV photocuring topcoat. The UV photocuring topcoat is prepared from, by weight, 20-25% of cycloaliphatic epoxy resin CER-170, 8-12% of aliphatic urethane acrylate DH-318, 30-35% of HDDA, 5-10% of benzil dimethyl ketal, 10-20% of isopropanol, 10-15% of modified mica powder, 5-10% of talcum powder, 1-2% of dispersing agents and 0.5-0.8% of antifoaming agents. The UV photocuring topcoat is low in volatility, low in smell, low in environmental pollution, high in hardness, good in hand feeling and glossiness, high in curing speed, high in production efficiency, capable of being cured at the normal temperature and applicable to a variety of substrates; by means of the UV photocuring topcoat, energy is saved, and energy consumption accounts for 1 / 5 that of a traditional coating; performance indexes of all aspects such as coating transparency, acid and alkali resistance, salt spray resistance and resistance to organic solvent such as gasoline are high, a paint film of the topcoat is particularly plumpy, and gloss of the topcoat is particularly outstanding.

An UV polishing and priming-free UV coating is prepared by raw materials in parts by weight as follows: 35-40 parts of epoxy acrylate, 20-25 parts of polyether acrylate, 10-12 parts of trimethylolpropane triacrylate, 5-8 parts of isobornyl acrylate, 1-2 parts of triethanolamine, 3-4 parts of tert-amylphenol, 1-3 parts of tetraethylammonium tetrafluoroborate, 2-4 parts of benzyltriphenylphospho, 1-2 parts of trifluoro acetyl acetone, 4-5 parts of 2,4,6-trimethyl benzoyldiphenyl phosphine oxide, 2-3 parts of benzil dimethyl ketal and 4-5 parts of a dispersing auxiliary. The UV coating has excellent water resistance, hot water resistance, drug resistance, caking property, toughness and flame retardant property, has excellent binding property with printing ink, and has the characteristics of high glossiness, good levelling property, small flavor, good wear resistance and the like; and only one procedure is required when UV gloss oil is adopted for UV polishing, the priming step is omitted, the operation cost is saved, and the work efficiency is improved.

The invention belongs to the technical field of chemical reaction engineering, and discloses a method for preparing benzil by oxidation of benzoin in a microreactor. The method utilizes efficient mixing and excellent mass transfer and heat transfer performance of the microreactor, nitric acid is used as a dispersion phase in the microreactor, benzoin is dissolved into an inert solvent as a continuous phase, the dispersion phase and the continuous phase are mixed to initiate reaction, the reaction is completed in a retardation tube behind the microreactor, and the separation of a product from unreacted nitric acid is achieved in a phase separation tank. In the method, a conversion rate of 99.8+% and high selectivity of 99.5+% can be achieved in 5 minutes, so that a reactor volume can be significantly reduced, and the safety of a reaction process can be improved.

The invention discloses a method for inhibiting XLPE insulated electrical tree aging based on a benzil derivative. The method includes first mixing dry LDPE with an antioxidant, a crosslinking agent and 4,4'-bis-dimethylamino-benzil according to the mass ratio of 100:0.1:2:0.5 fully in an internal mixer; preheating the LDPE with a press vulcanizer for full melting and conducting full crosslinkinginto an XLPE sample; conducting natural cooling to the room temperature and inserting a pin electrode into the sample by a pin mold in the cooling process; vacuum drying for 24-48 hours to eliminate impurities generated during the sample crosslinking process; finally performing an experiment with a DC superimposed pulse voltage electrical tree experiment system device.

The invention discloses a biomedical material special for human soft tissue adhesion. Alpha-butylcyanoacrylate, vinylpyrrolidone, hydroxypropyl methacrylate and isopropyl acrylate serve as the main components, citrate, aloe nano powder, benzil dimethyl ketal, N,N-dimethyl aniline, trilaurylamine, calcium carbonate, aluminum oxide, wollastonite powder, alumina-silicate ceramic fiber, degreased pupa powder, squalane, folium ginkgo extracts, L-cysteine and retarder are added, ball-milling, ultrasonic dispersing, mixing and stirring, drying, irradiation sterilizing and other processes are adopted, and therefore the adhesion strength, adhesion speed, adhesion durability and other aspects of the prepared biomedical material special for human soft tissue adhesion are remarkably improved, the industry requirements can be met, and the material has good application prospects.

The invention discloses a wood bonding glue, which comprises the following components in parts by weight: 8 parts of cyclohexanone, 20 parts of urethane acrylate, 6 parts of biphenyl, 10 parts of azodicarbonamide, 2 parts of zinc oxide, 6 parts of benzoyl peroxide, 15 parts of glyceryl methacrylate gel, 16 parts of polyisocyanate, 30 parts of epoxy resin, 7 parts of methyl methacrylate, 6 parts of benzoyl peroxide, difluorotetrachloroethane 18 parts, 6 parts of butyl acetate. The wood bonding glue provided by the invention has wide sources of raw materials, low price, environment-friendly glue, less pollutants, good bonding effect, fast drying and stable quality.

The invention relates to a preparation method of a 4,4'-di-trifluoromethyl benzil. The preparation method comprises the steps of: preparing 1,2-di(4-trifluoromethyl phenyl)-2-hydroxyl ketone through condensation reaction under alkaline condition by using p-trifluoromethyl benzaldehyde as a raw material and vitamin B1 (VB1) as a catalyst; in glacial acetic acid, oxidizing 1,2-di(4-trifluoromethyl phenyl)-2-hydroxyl ketone by using anhydrous cupric sulfate and ammonium nitrate as a co-oxidizing agent so as to obtain 4,4'-di-trifluoromethyl benzyl. The reaction time is short, the reaction condition is moderate, the reaction process is easy to control, and the yield of a product is high, therefore, the preparation method is suitable for industrialized production.

The invention discloses a binuclear nickel coordination compound and a preparation method thereof. The nickel coordination compound has an accurate space structure. The structure unit is [Ni2(C5HN3O6)2(bpy)(H2O)6]4H2O(bpy=4,4'-dipyridyl), the chemical formula is Ni2C20H30N8O22, the crystal system is the triclinic system, the space group is P-1, and the lattice parameters are as shown in the specification, wherein Alpha=109.695 degrees, Beta=92.130 degrees, and Gamma=96.161 degrees, and the nickel ion is the octahedral geometrical configuration of hexa-coordination. The preparation method for the binuclear nickel coordination compound comprises the following steps: executing the self-assembly reaction to 5-nitryl orotic acid potassium monohydrate, 4,4'-dipyridyl ligand and the nickel ions with the electrochemical activity through a hierarchy diffusion method, and preparing the binuclear nickel coordination compound. The operation of the preparation method is simple, the cost is cheap, and the method is suitable for the large-scale production. The obtained binuclear nickel coordination compound can be used as a catalyst material for catalytic-oxidating benzoin to prepare benzil, and has the potential application prospect.

The invention discloses a method for preparing benzil by iron-catalyzed air oxidation of benzoin. The method comprises the following steps: taking acidified dimethyl sulfoxide (DMSO) as a solvent, adopting iron salt containing iron ions as a catalyst under the heating condition and oxidizing the benzoin under the action of an oxidant to prepare benzyl; the reaction temperature under the heating condition is 40-80 DEG C; the oxidant comprises atmospheric air, high oxygenated air and oxygen. The method disclosed by the invention is mild in reaction condition, green and clean, and a product solvent is easy to separate.

The invention discloses a preparation method for 1,2,4,5-tetra-substituted imidazole derivatives and a catalyst for preparation, and belongs to the technical field of ionic liquid catalysis. In a preparation reaction, the molar ratio of benzil to aromatic aldehyde to aromatic amine to ammonium acetate is 1 to 1 to 1 to (1-1.2), the molar amount of the ionic liquid catalyst is 7-12% of the used benzil molar amount, the volume amount of a reaction solvent ethanol aqueous solution in milliliter is 6-8 times of the molar amount of the benzil in millimole; the reflux reaction time is 15-45 min, cooling is performed to room temperature after the reaction is finished, suction filtration is performed, the filter residue is washed with the ethanol aqueous solution and subjected to vacuum drying to obtain the 1,2,4,5-tetra-substituted imidazole derivatives. The preparation method has the advantages of high catalyst activity, biodegradability, simple product purification, high raw material utilization rate, simple and convenient operation in the whole preparation process and the like, and is convenient for large-scale industrialized application.

The invention discloses a nano light-cured anticorrosion spray-coating liquid relating to the field of treatment on surfaces of metal, concrete and wooden products. The nano light-cured anticorrosion spray-coating liquid consists of the following components in weight ratio: 50-60% of epoxy acrylate resin; 15-20% of trimethylolpropane acid resin; 3-5% of tripropylene glycol triacrylate triacrylic ester; 2-5% of N-methyl pyrrolidone; 2-4% of benzil dimethyl ketal; 0.5-2% of titanium nitride nano powder and 16-20% of titanium dioxide powder. The spray-coating liquid can be cured by sunshine or an ultraviolet lamp and is available for outdoor operation, wide in application range, non-toxic and odor-free, environment-friendly, simple in operation procedures, energy-saving and low in cost; and the formed layer has excellent resistance to corrosion, chemical and fading as well as remarkable adhesive property and has fireproofing property, good mechanical strength, dropping resistance, cracking resistance and pulverization.

The invention discloses a synthesis method of a diphenyl pyrazine derivative. The method is characterized in that benzil and glycinamide are used as raw materials, and a target product is prepared through five-step reaction. The obtained target product is high in purity, subsequent production of high-quality drugs is facilitated, and the synthesis method is reasonable in route design, mild in reaction condition, free of high-temperature reaction, good in safety and high in feasibility.

The invention belongs to the field of a preparation method for heterocyclic compounds, and in particular relates to a method for synthesizing 5,5-diphenyl-2-thiohydantoin by taking benzil and thiourea as original raw materials under an alkaline condition. The method comprises the following steps of: (1) adding the benzil, the thiourea, alkali and a solvent into a reaction kettle; (2) performing areflux reaction under a normal pressure condition; and (3) after the reaction ends, cooling, diluting, acidifying, separating and recrystallizing reaction liquid to obtain a target product, wherein in the step (1), the alkali is one or the mixture of hydroxide and carbonate; and the solvent is one or the mixture of more than two of water, dimethyl sulfoxide, acetone, tetrahydrofuran, acetonitrile, dioxane, methanol, ethanol and isopropanol. The invention has the advantages of readily available raw materials, temperate reaction condition, high yield, low cost and suitability for industrial mass production.

The invention discloses thermosensitive color-changing microcapsule UV (Ultraviolet) photo-cured printing ink and a preparation method thereof, and belongs to the technical field of printing ink. The thermosensitive color-changing microcapsule UV photo-cured printing ink is prepared from the following raw materials in parts by weight: 22 to 60 parts of epoxy acrylate, 15 to 25 parts of color developing microcapsule, 15 to 25 parts of polyester acrylate, 10 to 15 parts of dipropylene glycol diacrylate, 5 to 10 parts of trimethylolpropane triacrylate, 5 to 10 parts of acrylic acid-4-polyhydroxybutyrate, 0.5 to 3 parts of benzil dimethyl ketal, 1 to 5 parts of dispersing agent, 1 to 5 parts of hollow glass beads and 1 to 3 parts of UV varnish. The thermosensitive color-changing microcapsule UV photo-cured printing ink is cured by UV, and has the advantages of high drying speed, good fixing effect, clear meshes, water resistance, solvent resistance, abrasion resistance and the like, is almost zero in VOCs (Volatile Organic Compounds) emission, is environment-friendly, and has a wide application range and a higher application value.

The preparation method of the Chinese medicine injection using celandine as raw material for relieving pain due to cancers includes the following steps: cutting celandine, adding ethyl alcohol, heating-refluxing to make extraction, combining alcohol extract, pressure-reducing and recovering ethyl alcohol and making concentration, using phosphoric acid solution to regulate its pH value to acidity,cold-storing and filtering, using sodium hydroxide solution to regulate pH value of the obtained filtrate to basicity, using isometric trichloromethane to make extraction, combining trichloromethane solution, recovering trichloromethane, vacuum-drying residuum to obtain total alkaloid extract, then adding injection water, stirring and dissolving, using phosphoric acid solution to regulate pH value to acidity, filtering, adidng Tween-80, benzil alcohol and sodium chloride in filtrate, mixing and filtering.

The invention relates to a continuous preparation method of benzil or a derivative of the benzil. The preparation method comprises the following steps: performing a reaction on benzoin or a derivativeof the benzoin and nitric acid in a microchannel reactor to obtain the benzil or the derivative of the benzil, and optionally introducing oxygen or air during the reaction. After the completion of the reaction, the conversion rate of the product benzil is 98% or higher by a HPLC analysis. The reacted nitric acid solution can be recycled and reused.

The invention provides an antibacterial offset printing UV (Ultraviolet) ink diluent, which comprises the following components in percentage by weight: 85-95 percent of epoxy acrylate resin, 4-14 percent of acrylic ester, 0.3-0.6 percent of benzil dimethyl ketal, 0.2-0.5 percent of 9,10-epoxystearic acid monooctyl ester and 0.1-0.2 percent of an inorganic antibacterial agent. The invention further provides a preparation method of the antibacterial offset printing UV ink diluent. The inorganic antibacterial agent is added into the offset printing UV ink diluent, so that the offset printing UV ink diluent is endowed with high antibacterial performance. The offset printing UV ink diluent is a paste adhesive object with very high viscosity, and the inorganic antibacterial agent can be effectively and uniformly dispersed into the offset printing UV ink diluent, so that the inorganic antibacterial agent can be uniformly distributed on a product after printing, the efficient antibacterial performance is brought into full play, the printing suitability of the offset printing UV ink diluent is not influenced, and the surface of the product is free from harsh feeling after printing.

The invention discloses a photoluminescence material represented by formula 1, and a preparation method and applications thereof. The preparation method of the photoluminescence material comprises following steps: under nitrogen protection, aniline, benzil, 4- bromobenzaldehyde, and amine acetate are dissolved in acetic acid solvent, reflux reaction is carried out for 14 to 18h so as to obtain a reaction solution A, and then post-treatment is carried out so as to obtain an intermediate represented by formula 1-a; under nitrogen protection, the intermediate represented by formula 1-a, triphenylamine boric acid, sodium carbonate, and tetrakistriphenylphosphine palladium are dissolved in a mixed solvent, reflux reaction is carried out for 36 to 48h so as to obtain a reaction solution B, and post-treatment is carried out to obtain target compound DPA-PIM represented by formula 1. The raw material cost is low; the synthesis method is simple; the novel material high in sensitivity and excellent in performance is provided for preparation of oxygen sensors; under certain conditions, it is possible to determine existing of oxygen only based on observation of fluorescence color change with naked eyes; and the precision is as high as 0.2% (by volume).