33 results about "Triethyl borate" patented technology

Quaternary boron salts are used as initiators of polymerisation in adhesive compositions for bonding low surface energy substrates such as polyolefins. The quaternary boron salts are of the formula Iwherein R1 is C1–C10 alkyl,R2, R3 and R4, which may be the same or different, are, C1–C10 alkyl or C3–C10 cycloalkyl, phenyl, or phenyl-substituted C1–C10 alkyl or C3–C10 cycloalkyl, provided that any two of R1–R4 may optionally be part of a carbocyclic ring, andM+ is a metal ion or a quaternary ammonium ion.Particular examples of initiator compounds include sodium tetraethyl borate and lithium tetraethyl borate, lithium phenyl triethyl borate and tetramethylammonium phenyl triethyl borate.

Quaternary boron salts are used as initiators of polymerisation in adhesive compositions for bonding low surface energy substrates such as polyolefins. The quaternary boron salts are of the formula Iwherein R1 is C1-C10 alkyl,R2, R3 and R4, which may be the same or different, are, C1-C10 alkyl or C3-C10 cycloalkyl, phenyl, or phenyl-substituted C1-C10 alkyl or C3-C10 cycloalkyl,provided that any two of R1-R4 may optionally be part of a carbocyclic ring, and M+ is a metal ion or a quaternary ammonium ion.When M+ is a quaternary ammonium ion, the initiator may be used in a two-part composition having a (meth)acrylate monomer in both parts and the initiator compound in one part, the two parts being in a weight ratio of about 1:1.Particular examples of initiator compounds include sodium tetraethyl borate, lithium tetraethyl borate, lithium phenyl triethyl borate, tetramethylammonium phenyl triethyl borate, and tetra methyl ammonium phenyl tri-n-butyl borate, the last-mentioned of which is a novel compound.

Quaternary boron salts are used as initiators of polymerisation in adhesive compositions for bonding low surface energy substrates such as polyolefins. The quaternary boron salts are of the formula I wherein R1 is C1-C10 alkyl, R2, R3 and R4, which may be the same or different, are, C1-C10 alkyl or C3-C10 cycloalkyl, phenyl, or phenyl-substituted C1-C10 alkyl or C3-C10 cycloalkyl, provided that any two of R1-R4 may optionally be part of a carbocyclic ring, and M+ is a metal ion or a quaternary ammonium ion. Particular examples of initiator compounds include sodium tetraethyl borate and lithium tetraethyl borate, lithium phenyl triethyl borate and tetraethylammonium phenyl triethyl borate.

The invention discloses a halogen-free flame-retardant composite material which comprises the following components in parts by weight: 25-40 parts of modified rice hull powder, 27-46 parts of modified bagasse, 10-20 parts of p-diacetylene-benzene, 5-10 parts of triethyl borate, 80-100 parts of organic silicone oxygen resin, 10-20 parts of magnesium hydrate, 10-20 parts of aluminum hydroxide, 1-4 parts of a coupling agent and the like. A preparation method comprises the following steps: (1) weighing p-diacetylene-benzene, triethyl borate and organic silicone oxygen resin according to the formula, and melting; (2) mixing a polyethynylbenzene polymer with magnesium hydrate, aluminum hydroxide, an antioxidant and the coupling agent, melting in a mixing mill, putting polytetrafluoroethylene into the mixing mill, and melting; and (3) putting a granular material and a lubricant into a press vulcanizer, and performing hot-pressing at 8-15MPa, thereby obtaining the halogen-free flame-retardant composite material. As the organic silicon oxygen resin is generated, the flame-retardant effect and mechanical properties of the composite material can be improved.

The invention discloses a synthesis method of a moxifloxacin hydrochloride intermediate, and belongs to the field of medical intermediate synthesis. The synthesis method comprises the following steps: S1, chelation reaction: sequentially adding acetic oxide and glacial acetic acid to a reaction kettle, agitating and adding anhydrous zinc chloride, dropwise adding triethyl borate, carrying out agitated reaction after dropwise adding is ended and then adding a gatifloxacin intermediate, and reacting at 70-100 DEG C until the gatifloxacin intermediate is completely transformed; and S2, post-treatment: cooling and crystallizing a liquid in the reaction kettle, centrifugally filtering, pulping the obtained solid by using purified water and ethanol respectively and then centrifugally filtering again, and preparing the moxifloxacin hydrochloride intermediate after drying the solid. The method disclosed by the invention has the advantages of being easy to operate, simple in synthesis and high in yield. The yield of the product prepared by adopting the method disclosed by the invention is over 85%, the purity can be up to over 99%, and the moisture is smaller than or equal to 2%.

The invention discloses a method for preparing single-phase ZrB2 powder employing triethyl borate as a boron source through a sol-gel method. The method comprises the following steps: by virtue of the sol-gel method, with D-fructose, triethyl borate and zirconium n-propoxide as raw materials, obtaining precursor gel powder of ZrB2 by adjusting the molar ratio of B to Zr; and carrying out preheating and burning at different heating and cooling rates under protection of argon and cooling along with a furnace, so as to obtain the single-phase pure ZrB2 powder. The precursor gel powder obtained by reaction can reach uniform atomic scale and molecular scale; and the components of a final synthetic material can be strictly controlled by calculating the components of reactants. In addition, through simple process and cheap equipment, the gel or powder with large specific surface area can be obtained; and the purity of the product is high.

The invention discloses a halogen-free flame-retardant composite material which comprises the following components in parts by weight: 25-40 parts of modified rice hull powder, 27-46 parts of modified bagasse, 10-20 parts of p-diacetylene-benzene, 5-10 parts of triethyl borate, 80-100 parts of organic silicone oxygen resin, 10-20 parts of magnesium hydrate, 10-20 parts of aluminum hydroxide, 1-4 parts of a coupling agent and the like. A preparation method comprises the following steps: (1) weighing p-diacetylene-benzene, triethyl borate and organic silicone oxygen resin according to the formula, and melting; (2) mixing a polyethynylbenzene polymer with magnesium hydrate, aluminum hydroxide, an antioxidant and the coupling agent, melting in a mixing mill, putting polytetrafluoroethylene into the mixing mill, and melting; and (3) putting a granular material and a lubricant into a press vulcanizer, and performing hot-pressing at 8-15MPa, thereby obtaining the halogen-free flame-retardant composite material. As the organic silicon oxygen resin is generated, the flame-retardant effect and mechanical properties of the composite material can be improved.

The invention discloses a low-volatility environment-friendly pickling-free flux solution and its application in flame brazing, high-frequency welding or furnace brazing. In terms of weight percent, the flux solution includes the following components: 30% to 50% of triethyl borate, 25% to 50% of ethanol, 12% to 16% of water, 0% to 6% of boric acid, and sodium tetraborate 0% % to 3%, potassium tetraborate 0% to 3%, potassium fluoride 0% to 2%, potassium chloride 0% to 2%, cesium fluoride 0% to 1%. The invention also discloses a preparation method of the soldering flux solution: preparing triethyl borate and ethanol into a triethyl borate ethanol solution, adding water to the triethyl borate ethanol solution, and then selectively adding boric acid as active elements, Dissolve sodium tetraborate, potassium tetraborate, potassium fluoride, potassium chloride and cesium fluoride.

The invention relates to the field of nano ceramic fibers, and provides a method for preparing nano zirconium boride ceramic fibers from an organic zirconium source, the ceramic fibers and application. The method comprises the following steps of (1) adding cane sugar into a proper amount of organic solvent, heating to achieve dissolving, sequentially adding triethyl borate and zirconium acetate after cooling, adjusting the pH value of the solution to be acidic with acetic acid, adding a proper amount of a spinning aid after uniform mixing, and conducting stirring for 3-6 hours to obtain a precursor solution; (2) carrying out electrostatic spinning in a proper environment to obtain precursor fibers; and (3) carrying out high-temperature calcination on the precursor fibers in a tubular furnace in an argon atmosphere to obtain the nano zirconium boride ceramic fibers. According to the method, the zirconium acetate which is low in price and can be prepared in a laboratory serves as a zirconium source, the triethyl borate serves as a boron source, the diameter of the zirconium boride ceramic fibers prepared through an electrostatic spinning method is about 200 nm, and the fibers have the properties of being high in specific surface area, low in density, high in temperature resistance, good in thermal shock resistance and the like. The nano zirconium boride ceramic fibers can be usedin the fields of structural components, catalyst carriers, reinforcing materials and the like, and have wide application prospects.

The invention discloses a preparation method of high-modulus and high-heat-conducting asphalt-based carbon fibers. The preparation method comprises the following steps: firstly, preparing ethylene tarasphalt with the softening point of 80 to 90 DEG C through a common pressure nitrogen bubbling and purging method; then adding triethyl borate into the ethylene tar asphalt; them preparing boron-containing spinnable mesophase asphalt through a pressurization and thermal polymerization, and decompression and devolatilization method; then carrying out melting spinning, pre-oxidization, carbonization and graphitization to prepare a high-modulus and high-heat-conducting asphalt-based carbon fiber sample, wherein the tensile modulus is 800 to 900GPa and the heat conductivity is 800 to 1000W / m.K. According to the preparation method disclosed by the invention, a boron element is introduced into mesophase spinning asphalt through a chemical reaction method and uniform and controllable addition ofthe boron element is realized; the difficulty of a conventional method that the boron element is not uniformly added is solved; the boron element effectively has the effect of catalyzing the graphitization in a subsequent preparation process of the asphalt-based carbon fibers, so that the graphitization treatment temperature is reduced, the service life of a graphite furnace is prolonged and theproduction cost is reduced.

The invention discloses a novel synthesis method of moxifloxacin hydrochloride, belonging to the field of pharmaceutical chemistry. The synthesis method comprises the following steps: sequentially adding acetic anhydride and glacial acetic acid into a reaction kettle, adding anhydrous zinc chloride while stirring, dropwisely adding triethyl borate, stirring to react after finishing the dropwise addition, adding gatifloxacin intermediate, and carrying out after-treatment on the obtained solid to obtain a moxifloxacin hydrochloride intermediate; and in the presence of an organic solvent, reacting the moxifloxacin hydrochloride intermediate with (S,S)-2,8-diazabicyclo[4.3.0]nonane, dropwisely adding concentrated hydrochloric acid, reacting to obtain a moxifloxacin hydrochloride crude product, and recrystallizing with ethanol to obtain the high-purity moxifloxacin hydrochloride. The single impurity content of the moxifloxacin hydrochloride is lower than 0.05%, and the total impurity content is lower than 0.1%; and the method is simple to operate, has the advantages of mild conditions and high yield, and is suitable for industrial production.

The invention discloses a standard normal pressure film manufacturing method. It includes the following steps: inputting ethyl phosphate, triethoxy boron, and tetraethoxy silicane into respective corresponding tube; using carbureting valve to heat up to 137-143 degree centigrade to vaporize the ethyl phosphate; using it the vaporize the other two; adjusting the tube temperature to 105-110 degree centigrade; inducing the vaporized matter into the cavity to react and generate boron-phosphorosilicate glass and by-product. The invention can improve vaporization property by increasing gas tube temperature to 110 degree centigrade, ethyl phosphate to 140 degree centigrade which can not only prolong carbureting valve useful life, but also reduce production cost.

The invention discloses a method for preparing single-phase ZrB2 powder employing triethyl borate as a boron source through a sol-gel method. The method comprises the following steps: by virtue of the sol-gel method, with D-fructose, triethyl borate and zirconium n-propoxide as raw materials, obtaining precursor gel powder of ZrB2 by adjusting the molar ratio of B to Zr; and carrying out preheating and burning at different heating and cooling rates under protection of argon and cooling along with a furnace, so as to obtain the single-phase pure ZrB2 powder. The precursor gel powder obtained by reaction can reach uniform atomic scale and molecular scale; and the components of a final synthetic material can be strictly controlled by calculating the components of reactants. In addition, through simple process and cheap equipment, the gel or powder with large specific surface area can be obtained; and the purity of the product is high.