198 results about "Hexamethylphosphoramide" patented technology

The new method for preparing high crystallinity monodisperse water-soluble magnetic nano microparticles is characterized by that it selects the inorganic iron salts of anhydrous iron trichloride and iron chloride, etc. or metal organic iron compounds (such as iron pentacarbonyl, iron triacetylacetonate, iron biacetylacetonate, complex of cupferron and iron salt, iron octoate and ferric oxalate, etc.) as iron raw material, and utilizes high-temp. decomposition of them in high boiling point polar solvent (for example alpha-pyrrolidone and its derivatives (N-methyl-2-pyrrolidone and N-ethyl-2-pyrrolidone, etc.), N,N-dimethyl-2-imidazolone, hexametapol, gamma-butyrolactone and its derivative and low molecular weight (molecular weight M is less than or equal to 5000) polyglycol and its derivatives) to prepare magnetic nano microparticles. Said invention can adopts different iron raw materials and high boiling point polar solvents so as to obtain different types of magnetic nano microparticles (Fe, Fe2O3 and Fe3O4) with different sizes and crystallinities and different crystal structures.

This invention relates to a kind of beta phase polyvinylidene difluoride film laminate and its preparation method. The composition and quality ratio: inorganic hydrated salt 1 to 20 percent, polyvinylidene fluoride 80 to 99 percent; the inorganic hydrated salt is: Fe ( NO3) 3. 9H2O, Ni ( NO3) 2. 6H2O, or Co ( NO3) 2. 6H2O; The polyvinylidene fluoride is: polyvinylidene fluoride homopolymer or polyvinylidene fluoride- hexafluoropropylene copolymer. According to certain quality composition, dissolve polyvinylidene fluoride and inorganic hydrated salt in dimethyl formamide solvent, after misce bene, spincoating on glass or silicon chip, evaporate and crystallize for 24 hours at 20 to 100 deg, obtain polyvinylidene fluoride film laminate. This method avoids using of noxious solvent hexametapol.

A process for preparing cis-halochrysanthemic acid includes such steps as the addition reaction of raw material (sodium tert-butyl alkoxide), reaction for removing hydrogen chloride and hydrolysis, reflux with excess sodium hydroxide in the mixed solvent of methanol or ethanol and water to obtain cyclocompound, and acidation. Its advantages are simple process, high output rate, low cost and less pollution.

The invention discloses a polyurethane thermal-insulation composite board which comprises a polyurethane thermal-insulation layer and back lining layers arranged on the inner and lower surfaces of the polyurethane thermal-insulation layer, wherein the polyurethane thermal-insulation layer is prepared from a high-performance polyurethane rigid foam material. The high-performance polyurethane rigid foam material is prepared from polyester polyol, diphenylmethane diisocyanate, hexamethylene diisocyanate, polyacrylate, styrene-butadiene rubber, cyclohexylamine, triethylenediamine, stannous octoate, a foaming agent, hydroxy silicone oil, a flame retardant, expanded perlite, attapulgite, pentaerythritol and sorbitol. The flame retardant is prepared from red phosphorus, nano magnesium hydroxide, ammonium polyphosphate, aluminum diethyl hypophosphite, piperazidine pyrophosphate and hexametapol. The polyurethane thermal-insulation composite board disclosed by the invention has the advantages of high strength, favorable impact resistance, excellent flame retardancy and long service life.

The invention provides a preparation method for ion battery porous diaphragm and an ion battery. The method comprises the steps of dispersing a polymer and a pore former into a solvent I, thereby obtaining the solution containing complex, wherein the polymer is selected from one or more of polyvinylidene fluoride, poly(vinylidene fluoride-hexaflouropropylene)copolymer and polyaramid, the pore former is selected from alkali metal salt, total mass of the polymer and the pore former occupies 1-40% of the solution, a molar ratio of the pore former and the polymer is 0.05-5:1, and the solvent I isselected from at least one of N-Methyl pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide, acetone, triethyl phosphate, hexamethylphosphoramide, tetramethylurea, sulfolane and dimethyl sulfoxide; coating the solution and carrying out drying to obtain initial diaphragm, washing the initial diaphragm through utilization of a solvent which cannot dissolve the polymer, and carrying out drying. The method is simple. Thickness, a pore size and porosity of the porous diaphragm can be adjusted. Mechanical strength can be controlled. Mechanical strength is relatively high. Relatively high charge/discharge performance is achieved.

The present invention relates to a dithiocarbamic acid rare earth sulfofication accelerant and its preparation method. It includes the following steps: firstly, using dibenzylamine, NaOH and CS2 as raw material to prepare ligand, then making the ligand react with rare earth chloride to prepare rare earth dibenzyl dithiocarbamate coordination compound intermediate body, and making said intermediate body react with hexamethylphosphoramide to obtain the required product.

The invention relates to a domestic wastewater treatment flocculant, made from the following components: tetrasodium hydroxyethylidene diphosphonate, polysilicone, pyridine, benzotriazole, sodium ferrate powder, chitosan, naphthalene, sodium dichloroisocyanurate, sodium dodecyl benzene sulfonate, magnesium stearate, quaternary ammonium salt, polyaluminum ferric chloride, sodium petroleum sulfonate, sodium lactate, sodium carboxymethyl cellulose, sodium lauroyl sarcosinate, zinc gluconate, ferric sulfate, pentaerythritol stearate, 1,2-propanediol, hexamethylphosphoramide, lemon essential oil, and deionized water. The domestic wastewater treatment flocculant reacts fast with no toxic, harmful gases produced; a resultant is stable and never decomposes into toxic matters; the domestic wastewater treatment flocculant is efficient and nontoxic, is safe to a human body both before and after reaction, and is non-corrosive to objects; the domestic wastewater treatment flocculant has high treating efficiency specific to wastewater.

The invention relates to an insulating material for a wiring harness, and particularly relates to a modified polystyrene insulating material for a toughened flame-retardant wiring harness for household appliances. The material comprises the following raw materials in parts by weight: 8-9 parts of polyimide, 40-45 parts of polystyrene, 10-15 parts of SBS (Styrene Butadiene Styrene), 12-15 parts of silicon dioxide, 4-6 parts of aluminum nitride, 2-3 parts of maleic anhydride, 1-2 parts of lignocelluloses, 23-25 parts of montmorillonite, 23-26 parts of talcum powder, 23-25 parts of triethyl citrate, 1-2 parts of hexamethylphosphoramide, 1-2 parts of anti-aging agent NBC, 10-12 parts of hard kaolin, 3-4 parts of nanometer argil, 1-2 parts of nadic anhydride and 14-16 parts of auxiliaries. The insulating material combines the advantages of polystyrene, SBS and other raw materials, the properties of the traditional polystyrene material can be improved, the insulating material has good processability and mechanical property, the prepared material is flexible, impact-resistant, flame-retardant, good in insulating property, anti-aging, long in service life, and can be widely used for manufacturing insulating sheaths, wiring terminals, binding materials and the like of wiring harnesses for each part of a household appliances, thus having a wide market demand prospect.

The invention provides a soft type halogen-free flame-retardant cable material prepared from the following raw materials in parts by weight: 20-40 parts of polyolefin resin, 8-10 parts of a thermoplastic elastomer, 5-6 parts of organosilicone mixed compound, 3-5 parts of hexamethylphosphoramide, 2-4 parts of a compatibilizer, 40-50 parts of magnesium hydroxide, 3-6 parts of zinc borate, 4-6 parts of stearic acid, 0.4-1.2 parts of a silane coupling agent KH560, 0.1-0.5 part of an antioxidant 168, 15-25 parts of aluminium hypophosphite, 1-2 parts of dimethylaminoethyl methacrylate, and 15-20 parts of a modified filler. The soft type halogen-free flame-retardant cable material adopts the low-hardness thermoplastic elastomer to be blended with the polyolefin resin, besides the good mechanical performance is kept, and the cable material softness degree is greatly improved so as to expand the use scope of the cable material.

The invention discloses a fiber-reinforced composite coaxial cable material and a preparation method thereof. The preparation method comprises the following steps: (1) taking polystyrene, ethylene propylene diene monomer rubber, a melamine modified urea formaldehyde resin, hydroxypropyl methylcellulose, glass fibers, basalt fibers, hexametapol and allyl isothiocyanate according to parts by weight, adding the materials into a stirring tank, and stirring; (2) adding an antioxidant 1010, diamyl phthalate and propylene glycol monomethyl ether acetate into the stirring tank, and stirring while keeping the temperature constant; and (3) carrying out high-temperature extrusion on the mixed materials in the step (2) in a double screw extruder, and granulating, thereby obtaining the fiber-reinforced composite coaxial cable material. The fiber-reinforced composite coaxial cable disclosed by the invention has the characteristics of favorable properties and low cost.

The invention discloses a preparation method of a cast nylon composite material with a high friction-reducing and anti-wear surface layer. The preparation method comprises the following steps of: preparing dispersive suspensoid by hexamethylphosphoramide, ultra-fine kaolin and toluene diisocynate in proportion; adding dispersive suspensoid and teflon micro powder to a caprolactam melt; initiating caprolactam anionic ring-opening polymerization through a sodium hydroxide-toluene diisocynate catalytic activating system; casting a reaction mass into a preheated and heat-preserved centrifugal rotating die under normal pressure; after the reacting and casting liquid is polymerized, solidified and formed, gradually cooling and demoulding, thus obtaining the cast nylon composite material with the high friction-reducing and anti-wear surface layer. The prepared cast nylon composite material has the characteristics that an inner matrix and an outer surface layer are different in structure and performance, so that the requirements on manufacturing and using various pulleys, idler wheels, rope wheels and guide wheels for a transportation mechanism, a hoisting device and mine equipment can be met.

The invention relates to a synthetic method of p-flurobenzaldehyde, which belongs to the chemical and pharmaceutical field. In the synthetic method, the p-chlorobenzaldehyde and potassium fluoride react under the condition of a solvent and a catalyst at high temperature, wherein, the solvent is one of sulfolane, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, hexamethyl phosphoramide, nitrobenzene and ortho-nitrotoluene; the catalyst is one of or the mixture of two or more than two of benzyl triethyl amine chloride, tetrabutylammonium bromide, hexadecyltrimethylammonium chloride, methyltrioctylammonium chloride, tetraphenylphosphonium bromide, methyltriphenylphosphonium bromide, benzyl triphenyl phosphonium bromide and polyethylene glycol dimethyl ether. Compared with the conventional preparation method, the synthetic method of the invention has the advantages of cheap raw materials, short synthetic route and little 'three wastes' discharge. As the amount of the catalyst used is reduced and the price of the solvent is low, the production cost of the p-flurobenzaldehyde is decreased.

The invention relates to a spinning sewage environmental-protection treating agent, which is composed of the following ingredients: amino trimethylene phosphonic acid, pyrrolidine, starch xanthate, NPAM, copper chloride dehydrate, peracetic acid, boric acid, sodium formate, sodium hydrosulfite, sodium hypochlorite, DL-methionine, sodium citrate, white carbon black, caustic alkali, sodium aluminate, flyash, diatomite, activated carbon, hexamethyl phosphoramide, lemon essential oil, propylene glycol, acetic ether, ethylene oxide, triethanolamine, polymethyl hydrogen siloxane, polyethylene glycol octylphenol ether, poly(diallyldimethylammonium chloride), starch phosphate, 2-ethylhexyl acrylate, butyl hydroxyanisole and deionized water. The product has fast reaction speed, and no toxic or harmful gas is generated during the process. A product obtained after the reaction is stable and will no longer be decomposed into toxic substances. The spinning sewage environmental-protection treating agent is efficient and nontoxic, is safe to human before and after the reaction, is noncorrosive to objects, and has high sewage treatment efficiency.

The invention provides a sulfur-containing silane synthesizing method. According to the synthesizing method, one or several of dimethyl formamide, dimethyl acetamide, hexamethyl phosphoramide and 1,3-dimethyl-2-imidazolidone is utilized as a solvent; sodium and sulfur are pretreated in the solvent to obtain sodium suspension liquid and sulfur suspension liquid; the sodium suspension liquid is added into the sulfur suspension liquid to react to obtain sodium polysulfide; halogenated alkyl alkoxy silane is added into the sodium polysulfide to react and be decontaminated to obtain a sulfur-containing silane finished product. According to the synthesizing method disclosed by the invention, sulfur-containing silane is synthesized in the solvent, so that not only is reaction efficiency in production improved, but also impurity introduction in a production process is avoided, quality of a final product is guaranteed, and purity, yield and calculation yield of the final product are improved; meanwhile, potential safety hazards and environmental pollution in a sodium and sulfur treating process are avoided, and environment-friendly treating cost in the production process is reduced.

The invention discloses a PVC (polyvinyl chloride) tube formula which comprises the following components in parts by weight: 40-60 parts of PVC resin, 2-3 parts of plasticizer, 15-20 parts of calcium carbonate, 1-5 parts of epoxy soybean oil, 3-5 parts of hexamethylphosphoramide, 5-10 parts of impact modifier, 2-8 parts of zinc oxide and 0.5-1 part of paraffin. The added hexamethylphosphoramide can greatly improve the oxidation resistance of a PVC tube and is low in cost, thereby being suitable for popularization and application. Compared with the prior art, the PVC tube prepared from the formula has the characteristics of high strength and high toughness, is high in impact resistance and low in price of product components, and has great market competitiveness.

The invention discloses a piperidine derivative represented by a formula (VIII), and a preparation method and an application thereof in preparation of halofuginone. Under an alkaline condition and under catalysis of HMPA (hexamethylphosphoramide), cuprous iodide, TMEDA (tetramethylethylenediamine) and the like, a 1,3 dicarbonyl compound which easily generates stable negative ions is adopted to highly selectively undergo a reaction with an epoxy compound to synthesize the compound (VIII) with high yields. Compared with other process routes of synthesis of halofuginone, a process route provided by the invention comprises that the piperidine derivative (VIII) undergoes a one-step reaction to simultaneously complete decarboxylation and removal of a Cbz protecting group, more effectively shortens synthetic steps of the process route, and thereby greatly improving the yield of halofuginone hydrobromide; and moreover, the whole process route is simple and feasible in operation, has mild reaction conditions, has the adopted catalysts which are low in cost and are easy to get, and quite easily realizes the large-scale industrialized production.

The invention discloses a heavyweight corrugated pipe for concrete. The heavyweight corrugated pipe comprises the following materials in parts by weight: 1-2 parts of calcium acetylacetonate, 0.7-1 part of hexamethylphosphoramide, 1-2 parts of bisimidazolidinyl urea, 10-12 parts of vermiculite powder, 1-2 parts of polyethylene glycol 400, 1-2 parts of white mineral oil, 2-3 parts of heavy calcium carbonate, 1-2 parts of ethylene diamine tetra(methylene phosphonic acid) sodium, 2-3 parts of charcoal powder, 1-2 parts of butyl p-hydroxybenzoate, 0.2-0.4 part of ammonium ethoxylated alkylphenol sulfate, 90-100 parts of polypropylene and 4-7 parts of composite additives. By virtue of the heavy corrugated pipe disclosed by the invention, the defect that the current polyethylene corrugated pipe is easily floated in the concrete construction due to the light weight is improved and the heavy corrugated pipe has the characteristics of good tensile strength and ring stiffness, good tolerance and strong impact resistance.

The invention discloses multifunctional polyethylene plastics. The multifunctional polyethylene plastics comprises polyethylene, filler, an antistatic agent, an anti-aging agent, a toughening agent, a lubricant, a dispersing agent and a coupling agent, wherein the filler adopts glass powder; the antistatic agent adopts fatty alcohol polyoxyethylene ether; the anti-aging agent adopts hexamethylphosphoramide; the toughening agent adopts polyvinyl butyral; the lubricant adopts organic silicone oil; the dispersing agent adopts an ethylene-acrylic acid copolymer; the coupling agent adopts di(dioctylpyrophosphato) ethylene titanate. The multifunctional polyethylene plastics comprises polyethylene, the filler, the antistatic agent, the anti-aging agent, the toughening agent, the lubricant, the dispersing agent and the coupling agent and has the advantages of high hardness, high strength, antistatic performance, aging resistance, scraping resistance, good quality and long service life.

The invention discloses a heat insulating plastic bottle cap masterbatch. The heat insulating plastic bottle cap masterbatch is prepared from the following raw materials in parts by weight: 100-105 parts of a ABS (acrylonitrile-butadiene-styrene) copolymer, 0.6-1 part of basic bismuth chloride, 0.5-1 parts of dimethyl benzyl carbinol, 1-2 parts of difenoconazole, 3-4 parts of hollow glass beads, 0.5-1 part of tributyl tin trichloride, 1-2 parts of polybrominated styrene, 0.3-1 part of hexamethylphosphoramide, 0.6-1 part of 2-bromo-4-methylphenol, 0.8-1 part of ammonium metaborate, 0.8-2 parts of chromium carbonate, 2-3 parts of bisphenol A polycarbonate, 0.7-1 part of nano diatomite, 1-2 parts of glyceryl tristearate, 0.7-1 part of a silane coupling agent KH560 and 3-4 parts of a toughening packing. The added hollow glass beads and nano diatomite for preparing the heat insulating plastic bottle cap masterbatch have good heat insulating properties and have the effects of well protecting bottled items so that the service life of some bottled items stored in a high-temperature environment for a long time can be prolonged and the security of the bottled items can be improved, and the added toughening packing can further improve the toughness of the ABS copolymer and improve the wear resistance and the fracture resistance of plastic bottle caps so that the plastic bottle caps have good sealing and protecting effects.

The invention discloses a zinc-nickel battery with long service life and a preparation method thereof. The preparation method comprises the following steps: putting foamed nickel into a clear solutionprepared from Ni (NO3) 2.6 H2O, hexamethylphosphoramide, functionalized CNT and ammonia water, reacting at 80-90 DEG C for 20-24 hours, and growing Ni (OH) 2/CNT on a foamed nickel substrate to obtain a nickel electrode; by taking a zinc foil as a working electrode and a Co3O4 electrode as a counter electrode, carrying out electro-deposition in an electrolyte containing KOH and Zn (CH3COO) 2 to prepare a porous zinc electrode; by taking a nickel electrode as a positive electrode, and a porous zinc electrode as a negative electrode, separating the two electrodes by a PAM-sodium alginate polymer electrolyte, and assembling the zinc-nickel battery. According to the invention, the gel electrolyte with high ionic conductivity and water retention performance, the ultrathin nickel positive electrode with high surface area and conductivity and the porous zinc electrode are adopted; the stability of the battery is remarkably improved and the service life of the battery is prolonged.