298 results about "Borane" patented technology

A polyfunctional organohydrogensiloxane is prepared using a fluorinated triarylborane Lewis acid as catalyst. The polyfunctional organohydrogensiloxane may be formulated into release coating compositions. Alternatively, the polyfunctional organohydrogensiloxane may be further functionalized with a curable group to form a clustered functional organosiloxane. The clustered functional organosiloxane may be formulated into thermal radical cure adhesive compositions.

The present invention relates to the technical field of resin molds, and specifically to a toughened epoxy resin plastic mold and a preparation method thereof. In order to improve the toughness of the epoxy resin mold, a modified nano-carbon fiber component is added to the epoxy resin matrix. Adding it to the epoxy resin matrix can effectively disperse stress, thereby improving the toughness of the material. On this basis, the present invention also conducts a modification treatment on the nano-carbon fiber material, introducing a borane structure and fluorine element on its surface, and conducting an epoxidation treatment on its surface, so that the nano-carbon fiber can participate in the curing of the epoxy resin, improving the bonding strength with the epoxy resin matrix. Moreover, the fluorine element and borane group introduced in this process can further enhance the stability and friction resistance of the epoxy resin, reducing the damage suffered by the mold during use.

The invention relates to a method for constructing a C-N bond or a C-C bond through an insertion reaction of oxygen-sulfur ylide and aromatic amine. According to the method, tris (pentafluorophenyl) borane is taken as a catalyst, oxygen-sulfur ylide and aromatic amine are taken as raw materials, and N-H or C-H insertion reaction is carried out under different temperatures and solvents. According to the method, the defect that a metal catalyst or an oxidizing agent is used traditionally is overcome, and on the basis of the method, various alpha-amino-acid ester derivatives or diaryl acetate derivatives can be obtained by using different aromatic amines and oxygen-sulfur ylide as substrates. According to the method, the raw materials are easy to obtain, the operation is simple, the use of a catalyst and an oxidizing agent is avoided, and the method is a mild, effective, feasible and environment-friendly method for preparing the alpha-amino-acid ester and the diaryl acetate and has important application value.

According to the method for preparing the nano noble metal by directly introducing the reducing agent borane cluster into the carbon carrier, the borane cluster weak reducing agent is loaded on the carbon carrier to prepare the loaded nano noble metal through in-situ reduction, and agglomeration of metal sites can be avoided through the weak reducibility of the borane cluster; the reducing agent is introduced to the carbon carrier, and the hard supporting effect of the carbon carrier can also avoid large-scale aggregation of formed metal. The nano precious metal is dispersed in the carbon carrier, the dispersity of the nano precious metal is good, and the size of the nano precious metal is smaller than 10 nanometers. Compared with the prior art, the reducing agent borane cluster is directly introduced to the surface of the carbon carrier, in-situ reduction of precious metal ions is achieved, the high-dispersion small-particle-size supported nanometer precious metal is effectively obtained, and the method is easy to operate, reliable in preparation process, good in repeatability and beneficial to large-scale preparation.

The present invention relates to a dental diaphragm copolyester and a preparation method thereof, the preparation method comprises the following steps: 2, 5-furandicarboxylic acid or an ester thereof, aliphatic or alicyclic diol and (2-hydroxy-5-formyl phenyl) diphenylborane are subjected to a reaction to obtain an esterification or ester exchange product; and carrying out condensation polymerization on the esterification or ester exchange product and the stabilizer to prepare the copolyester for the dental diaphragm. 2, 5-furandicarboxylic acid is derived from a renewable biomass resource and meets the requirements of green and sustainable development; compared with terephthalic acid and furan ring structures, the film has higher rigidity and polarity, the yield of hot press molding is improved, the same correction force can be met by a thinner film, the wearing comfort of a patient is improved, and meanwhile stress relaxation is improved; the catalyst perfectly combines strong Lewis acidity, intramolecular stabilization and potential bifunctional activation through structural design, provides possibility for efficient and green synthesis of polyester, avoids use of heavy metal, and is higher in biological safety.

The invention provides a synthetic method of an o-carborane compound. The synthetic method is suitable for preparing an ester group substituted o-carborane derivative. The synthesis method comprises the following synthesis steps: by taking 1-carboxyl-2-(substituent)-o-carborane and a hypervalent iodine reagent as raw materials, carrying out hydration and substitution reaction in a solvent at the reaction temperature of 50-120 DEG C for 2-36 hours to generate the 1-ester-2-(substituent)-o-carborane compound. The reactants involved in the invention have good universality, and the functional groups of the substrate have good compatibility; the synthesis method provided by the invention is relatively high in selectivity and yield, single in reaction system composition, simple in post-treatment and easy to implement.

The invention relates to the technical field of electrode materials, in particular to a nitrogen-boron-silicon-carbon negative electrode material and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: mixing an organic carbon source, an organic nitrogen source, a boron source, a cross-linking auxiliary agent and a solvent, and sequentially carrying out cross-linking reaction and calcination to obtain a nitrogen-boron-doped porous carbon matrix; carrying out silicon or silicon-boron deposition on the nitrogen-boron-doped porous carbon matrix and reaction gas in a fluidized state to obtain a silicon-carbon precursor; the reaction gas is mixed gas of silane and borane or silane; and coating the silicon-carbon precursor with a mixed gas of a carbon source, a nitrogen source and a boron source in a fluidized state to obtain the nitrogen-boron-silicon-carbon negative electrode material. The nitrogen-boron-silicon-carbon negative electrode material prepared by the preparation method disclosed by the invention has excellent cycle performance, rate charge-discharge performance and relatively low expansion effect.

The invention discloses an inorganic-organic hybrid cross-linked network high-toughness material and a preparation method thereof, and belongs to the technical field of engineering material preparation. The high-toughness material is composed of an inorganic phase component and an organic phase component, the inorganic phase component is prepared from 5 to 10 parts of amino modified silicon dioxide nanoring; the organic phase component is prepared from the following components in parts by weight: 90 to 105 parts of polycaprolactone glycol, 14.5 to 16.5 parts of isophorone diisocyanate, 0.8 to 1.5 parts of dibutyltin dilaurate, 4 to 6 parts of bis-catechol borane and 6 to 10 parts of polydopamine nano particles. The fracture performance of the material can reach 20 kJ / m or above and is far higher than-1 kJ / m of a common elastomer and-10 kJ / m of high-toughness hydrogel, and meanwhile the tensile strength of 30 MPa or above is kept. According to the material disclosed by the invention, the dynamic borate bond is utilized, after the material is in contact with a damaged section, efficient self-repairing can be realized after the material is placed at room temperature for 24 hours, and the repairing efficiency is gt; by heating and applying pressure, the whole material can be reshaped through fracture and recombination of the dynamic bonds, and green and sustainable effects are achieved.

A composition and method can be used in the preparation of various siloxanes. The composition and method employ a fluorinated triarylborane Lewis acid, a hydrocarbonoxy-functional organosilicon compound, and a silyl hydride. The fluorinated triarylborane Lewis acid catalyzes reaction of a hydrocarbonoxy moiety (from the organosilicon compound) and a silicon-bonded hydrogen atom (from the silyl hydride) to form a siloxane bond.

The invention discloses lithium borohydride and a preparation method thereof, and belongs to the technical field of hydrogen storage material preparation. The preparation method provided by the invention comprises the following steps: in a hydrogen atmosphere of 50bar, mixing lithium hydride, triethylamine borane and an organic solvent, and performing mechanical ball milling to obtain a mixture; and evaporating the solvent in the mixture, and carrying out heat treatment to obtain the lithium borohydride. Lithium borohydride is prepared through mechanical ball milling, the preparation process is high in safety coefficient, low in energy consumption, simple in process, mild in condition, adjustable in reaction process and easy to implement; the optimal yield is 80%, and the method is originally superior to other similar processes, has technical conditions for efficient mass production, and has a wide application prospect in hydrogen storage materials.

The invention relates to a low-expansion moisture-resistant electronic component packaging resin adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials. The resin adhesive comprises the following components: modified resin, phenyl methyl organic silicon resin, epoxy vinyl resin, a dynamic functional curing agent, a microencapsulated dicyandiamide curing agent, perfluorooctyltriethoxysilane, functional filler and the like; the modified resin is obtained by modifying hydrogenated bisphenol A epoxy resin with hydrogen-terminated polydimethylsiloxane and trimethylsiloxy silicate ester, adding a silane coupling agent and mixing; the dynamic function curing agent is obtained by reacting hexamethylenediamine and intermediate powder obtained by reacting 2, 3-dihydroxy benzaldehyde with pinacol borane; the functional filler comprises silicon dioxide and boron nitride which are subjected to surface treatment by a silane coupling agent. The low-expansion and high-moisture-resistance electronic component packaging resin adhesive is prepared from the components according to a specific ratio and a specific method, the components have a synergistic effect and play advantages, and the packaging reliability and the service life of an electronic component are guaranteed.

The invention relates to an RGD (arginine-glycine-aspartic acid) peptide modified mercaptododeborane derivative and a synthesis method, the derivative utilizes RGD peptide to perform chemical coupling modification on mercaptododeborane anion salt (BSH), and the BSH and the RGD peptide are connected through a hydrophilic intermediate connector with a double bond at one end and carboxyl at the other end. A hydrophilic chain is selectively introduced to serve as an intermediate connector, a series of compounds are synthesized through a convenient and efficient sulfydryl-alkene click reaction and an amino-carboxyl amidation condensation reaction and are purified, various cationic BSH salts and RGD peptide are connected, and targeted modification of the RGD peptide on an existing boron carrying agent BSH is achieved. The derivative obtained by the invention is not reported before, has the potential to improve the tumor targeting ability of the existing boron carrying agent, and is expected to be used as a drug compound for BNCT treatment.

A process for reducing a carboxylic acid to an alcohol using an amine-borane in the presence of a Lewis acid catalyst.

The invention discloses a preparation method, an intermediate and application of menochromone. The preparation method comprises the following steps: reacting 4-bromopyrrole-2-carboxylic acid with propargylamine to generate 4-bromo-N-propynyl pyrrole-2-formamide; the preparation method comprises the following steps: reacting 4-bromo-N-propinyl pyrrole-2-formamide with pinacol borane to generate a mixture; reacting the mixture with 2-(t-butyloxycarboryl amino)-5-iodo-1H-imidazole to generate (E)-(5-(3-(4-bromo-1H-pyrrole-2-formamido) prop-1-ene-1-yl)-1H-imidazole-2-yl) tert-butyl carbamate, and reacting the (E)-(5-(3-(4-bromo-1H-pyrrole-2-formamido) prop-1-ene-1-yl)-1H-imidazole-2-yl) tert-butyl carbamate with the tert-butyl carbamate; and reacting the (E)-(5-(3-(4-bromo-1H-pyrrole-2-formamido) prop-1-ene-1-yl)-1H-imidazole-2-yl) tert-butyl carbamate with a dioxane hydrochloride solution, so as to generate the menochromone. The invention provides a preparation method of menosin, which is short in synthetic route, simple and convenient to operate, high in product yield and suitable for industrial production.

The invention discloses a preparation method of a copper-palladium alloy loaded nano titanium dioxide semiconductor material as a catalyst for a carbon dioxide reduction reaction. Firstly, alloy nanoparticles are generated through a sol-gel method, the morphology of the nanoparticles is controlled and agglomeration is prevented through oleylamine and oleic acid, and borane-tert-butylamine is added at the temperature of 170 DEG C to regulate and control the sizes of the generated alloy nanoparticles. A series of characterizations prove that the catalyst has a very good particle loading condition, uniform particle distribution and increased reaction active sites, and shows excellent activity when being applied to a carbon dioxide reduction reaction, when the loading capacities of copper and palladium are respectively 1%, the activity of the obtained catalyst is the highest, the methane generation rate can reach 20.23 mol / g / h, and the methane generation rate can reach 20.23 mol / g / h. The selectivity of methane reaches 100%.

The application discloses a catalyst for isocyanate borohydration reaction and a preparation and application method thereof. When the catalyst is used for catalyzing the borohydration reaction of isocyanate and borane to synthesize borate, the catalyst has high catalytic activity, mild reaction conditions (the reaction can be carried out at room temperature), short reaction time, high product yield (≥99%), and the reaction is simple, controllable, and simple in post-treatment.

The present invention relates to the technical field of adhesives, and in particular to an aluminum-plastic film adhesive for lithium battery soft packs and a preparation method thereof. The adhesive comprises the following components in parts by weight: 100 parts of a polyolefin resin, 1-5 parts of a boric acid ester, 0.5-1 parts of a borane, 0.5-1 parts of a boric acid, 0.5-2 parts of an allyl diepoxypropyl isocyanate, and 0.1-0.5 parts of a peroxide initiator. The allyl diepoxypropyl isocyanate in the present invention can greatly improve the adhesion between the polyolefin resin and polypropylene (PP) and aluminum foil. Under the initiation of the initiator, the double bonds of the allyl diepoxypropyl isocyanate undergo a grafting reaction with the polyolefin, thereby grafting the allyl diepoxypropyl isocyanate onto the polyolefin. Simultaneously, the epoxy bonds react with the boric acid, the boric acid ester, and the borane. Furthermore, the carbonyl groups and N atoms on the allyl diepoxypropyl isocyanate molecules both increase the polarity of the polyolefin, and can generate weak bonding reactions with the boron atoms and the aluminum foil.

The present application relates to a kind of catalyst composition and its application in catalytic preparation optically active secondary alcohol, the catalyst composition includes chiral ionic bridged aryloxyalkane rare earth complex and additive, the additive is selected from one or more of pyrimidine, N,N-dicyclohexylmethylamine, 4,4'-dipyridyl.The above-mentioned catalyst composition can be used for synergistically catalyzing asymmetric borohydration of chalcone and its derivatives with pinacol borane, and show high catalytic activity and high enantioselectivity, product yield is as high as 99%, ee value can reach 84%, provide a reliable new way for the efficient, high selective synthesis of optically active secondary alcohol.

The present invention belongs to the technical fields of chemical pharmaceuticals and fine chemical preparations. Specifically, it relates to a method for the visible-light catalytic synthesis of organoboron compounds. This method uses aryl diazoacetate compounds and aminoborane adducts as raw materials, and under the irradiation of visible light, organoboron compounds are obtained. The novel method for the visible-light catalytic synthesis of organoboron compounds provided by the present invention provides a simple, efficient, and environmentally friendly new method for the synthesis of such compounds, and has wide applications in the technical fields of chemical pharmaceuticals and fine chemical preparations.

The invention belongs to the technical field of organic luminescent materials and semiconductors, and provides a seven-membered ring boron oxide compound, a preparation method thereof and an electroluminescent device. The structural formula of the seven-membered ring boron oxide compound is as shown in formula (1): # imgabs0 #, the electroluminescent device is prepared by taking the seven-membered ring boron oxide compound as a guest luminescent material, and the technical problem of low luminous efficiency of the existing compound containing a boron oxide structure as a luminescent material is solved.

The present disclosure relates to methods and apparatuses for depositing metal-containing material on a substrate by a selective deposition process. The method comprises providing a substrate in a reaction chamber, providing a metal alkoxide precursor into the reaction chamber in a vapor phase; and providing a second precursor into the reaction chamber in a vapor phase to form metal-containing material on the substrate. The second precursor according to the disclosure comprises a borane compound and the substrate comprising a first surface and a second surface.

The present application relates to the application of open-cage borane compounds in the preparation of immunosuppressants, belonging to the technical field of biological medicine. The open-cage borane compounds of the present application include nest borane compounds and / or spider web borane compounds, and the pharmaceutically acceptable solvates or pharmaceutically acceptable complexes of the nest borane compounds and the spider web borane compounds. The open-cage boron clusters of the present application have dehydrogenase-like activity, can catalyze the dehydrogenation reaction of hydroxyl-containing organic substrates in a biological system, promote the conversion of NAD(P) + to NAD(P)H, further improve the intracellular oxidation-reduction ratio, induce cell redox stress, and further reshape the metabolic pattern of HSCs from the source, promote the differentiation of immune cells to immunosuppressive phenotype, and play an immunosuppressive role.

The invention discloses a nitrogen-rich energetic ionic salt compound based on bis-(5-aminotetrazole) boron. The nitrogen-rich energetic ionic salt compound comprises bis-(5-aminotetrazole) boric acid guanidine salt (I), bis-(5-aminotetrazole) boric acid aminoguanidine salt (II) and bis-(5-aminotetrazole) borane perchlorate (III), the structural formulas of the compounds are shown as (I)-(III). The compound can be used for mixed explosives and fuel-rich propellants.

The invention relates to the technical field of organic synthetic chemistry, in particular to a preparation method and medical application of selenophosphate promoted by tris (pentafluorophenyl) borane. The preparation method of the selenophosphate ester comprises the following steps: under the action of tris (pentafluorophenyl) borane, taking seleno cyanate ester and phosphate ester as reaction raw materials, and carrying out stirring reaction under a certain temperature condition to obtain the selenophosphate ester compound. The synthesis method is mild in condition, does not need a metal catalyst and an oxidizing agent, and accords with the idea of green chemistry. The method also has the advantages of simplicity in operation, few byproducts, high purity and the like. In-vitro anti-inflammatory experiments prove that the selenophosphate compound disclosed by the invention has remarkable anti-inflammatory activity, can effectively inhibit the generation of inflammatory factors and cell inflammatory response, can be used as an active ingredient of anti-inflammatory drugs, and has a wide clinical application prospect.

The application discloses a kind of efficient adsorption separation method of impurities in borane preparation process, belong to gas separation technical field.The method includes: after ZIF-8 powder is vacuum dried, with 3-aminopropyl triethoxysilane in anhydrous toluene at 80 ℃ reflux reaction 12-24 hours, after washing, dry and obtain amido functionalization NH2-ZIF-8 composite adsorbent;It is filled in vertical fixed bed adsorption tower, and under-30 ℃-20 ℃, 0.3-0.8MPa, the crude ethyl borane gas containing boron trifluoride is imported and is adsorbed at low temperature;After adsorption saturation, regenerate by 80 ℃ heating and vacuum extraction.The grafting amount of amido on the surface of NH2-ZIF-8 obtained by the method is 2.0-3.5mmol / g, specific high selectivity adsorption of BF3 is realized, sufficient adsorption sites are provided, and the adsorbent has strong regeneration performance.

To provide a method for obtaining an optically active hydrogen-phosphine borane compound at high optical purity. Also, to provide a method for obtaining an optically active 2,3-bis(dialkylphosphino)pyrazine derivative at high optical purity. Provided is a method for producing an optically active hydrogen-phosphine borane compound comprising carrying out a decomposition reaction of an optically active phosphine borane compound in the presence of a phase-transfer catalyst using an alkaline aqueous solution and an organic solvent. Also provided is a method for producing an optically active 2,3-bis(dialkylphosphino)pyrazine derivative using the optically active hydrogen-phosphine borane compound obtained.

The application provides a wear-resistant and sweat-resistant acrylic paint, a preparation method and application thereof, and belongs to the technical field of paints.The wear-resistant and sweat-resistant acrylic paint disclosed by the application is composed of the following raw materials in parts by weight: 30-50 parts of water-based acrylic resin, 15-20 parts of cashew phenol-based polyurethane resin, 0.8-1.5 parts of adhesion promoter, 3-5 parts of titanate coupling agent, 3-15 parts of filler, 0.5-1.8 parts of thickening agent, 0.5-2.0 parts of leveling agent, 0.5-1.0 parts of wetting agent, 0.5-1.5 parts of defoaming agent, 0.5-2 parts of cosolvent and 5-15 parts of water; wherein the components of the water-based acrylic resin include acrylic monomer, dithio glycolic acid, tri-n-butyl borane and aziridine crosslinking agent; and a preparation method of the acrylic paint is also provided.The acrylic paint provided by the application has excellent mechanical properties, good adhesion, excellent water resistance, scratch resistance, wear resistance, chemical resistance, sweat resistance and corrosion resistance and the like, and can be applied to 3C products and the glasses industry, thereby prolonging the service life of the products.

The invention discloses a process for recovering rare earth oxide from rare earth oxide waste residue, and relates to the technical field of rare earth oxide recovery, and the process specifically comprises the following recovery steps: step 1, smelting: under the protection of argon atmosphere, melting neodymium iron boron alloy in a graphite crucible by adopting a vacuum induction melting furnace to obtain alloy mother liquor, and then carrying out heat preservation for 20-30 minutes; according to the technology for recycling the rare earth oxide from the rare earth oxide waste residues, rare earth oxidation loss is avoided through argon protection smelting, fluoride or borate is added into a graphite crucible, the smelting temperature is reduced by means of the low-melting-point characteristic of fluoride or borate, and meanwhile the adhesion loss of the rare earth oxide on the crucible wall is reduced by forming a rare earth-fluorine / boron composite melt; b-H bond breakage is accelerated through a platinum catalyst, borane by-products are recycled synchronously, rare earth colloid wrapping is avoided through EDTA disodium modified precipitation, and the COD value of wastewater is reduced; through the synergistic effect of gradient magnetic separation and pH regulation, the iron removal rate is larger than 99.9%, and the purity of the rare earth hydroxide reaches 99.8% or above.

The invention discloses a boron modified azo compound, a preparation method and application, and relates to the technical field of azo compounds, the preparation method comprises the following steps: step 1, mixing: adding an azo compound and organic boric acid, inorganic boric acid or borane into a solvent according to a mass ratio of 4: (08-1.2), and mixing to obtain a mixture; step 2, reaction: heating the mixture to 75-85 DEG C, and stirring for reaction to obtain a reactant; and 3, discharging: sequentially carrying out extraction, rotary evaporation and crystallization on reactants, and drying to obtain the boron modified azo compound. The preparation method has the effects of improving the thermal stability of the boron modified azo compound, reducing harmful byproducts and improving the mechanical property and chemical inertness; according to the preparation method of the boron modified azo compound, the boron material with high thermal stability is fully utilized, the azo compound is modified by the boron compound, so that the effect of a decomposition mechanism of the azo compound is changed, the operation is simple and safe, and the preparation method is suitable for large-scale mass production.

The invention discloses a preparation method of a sodium lauryl glycol carboxylate compound, which comprises the following specific steps: adding 1, 2-epoxydodecane and glycolic acid into a first reaction flask containing a solvent, and carrying out heating reaction under the action of a large-steric-hindrance catalyst to obtain lauryl glycol acetic acid; wherein the solvent is cyclohexane, normal hexane or methylbenzene, and the large steric hindrance catalyst is tri (pentafluorophenyl) borane; and S3, adding the lauryl glycol acetic acid prepared in the step S1 into a second reaction flask containing water, and adjusting the pH value of the solution in the second reaction flask to 8.5-11.5 by using a certain amount of sodium hydroxide solution to prepare lauryl glycol sodium carboxylate, namely the target compound. According to the preparation method disclosed by the invention, the single selectivity of the synthesis process is improved, so that the purity and yield of the sodium lauryl glycol carboxylate compound synthesized by the route are greatly improved, and the product becomes better and better in application.