113 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 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 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.

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 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 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 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 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 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).