216 results about "Carbamic acid esters" patented technology

The invention discloses an anisotropic conductive film composition comprising a binding agent containing at least one of polyester type polyurethane resin, polyurethane acrylate resin, and carbamic acid ester resin; ethylene-acetic acid vinyl ester copolymer; materials capable of free radical polymerization containing tricyclodecane dimethanol diacrylate or tricyclodecane dimethanol dimethyl methacrylate; and organic particles. To be specific, the invention relates to a resin composition used for connection of the circuit and a film, which is provided with an extension rate in a range from 10 to 100% after the solidification and has no obvious retraction and expansion in the connection structure. The reliability of the electric connection under the high temperature and high humidity condition can be reduced. The invention also provides a semiconductor device containing the above mentioned anisotropic conductive film.

The invention provides application of photosynthetic bacteria fermentation broth in pesticide and metal combined contamination soil. In the application, the photosynthetic bacteria fermentation broth with the number effective viable bacteria to be between 108 and 1,010 per millimeter is diluted to 10 to 150 times with water; the fermentation broth is uniformly sprayed to degrading bacteria treated soil in dosage of between 10 and 50kg per mu; the earth surface is turned over for about 20 cm after the spraying is completed to ensure that the broth and the soil are sufficiently mixed and the photosynthetic bacteria can degrade residues of carbamic acid ester pesticide in the soil in high efficiency; and simultaneously, the bioavailability of the metal can be reduced to repair the carbamic acid ester pesticide and metal combined contamination soil. The photosynthetic bacteria has wide raw material sources, low price and easily controlled growing condition, can use low molecular organic substances as photosynthetic electron receptor to perform photo heterotrophic growth under anaerobic illuminating condition, can use organic substances as breathing substrate to perform aerobic or heterotrophic growth under dark and aerobic conditions, can carry out the photosynthesis without releasing oxygen, and is suitable for large-scale industrial implementation.

The invention relates to a biological preparation method of an intermediate of atazanavir. (S)-tertiary butyl (4-chloro-3-carbonyl-1-benzene butyl-2-yl) carbamic acid ester is taken as a substrate. The preparation method comprises the following steps of adding the substrate, a cosolvent and glucose into a reactor, stirring uniformly, weighing ketoreductase powder, glucose dehydrogenase and cofactor, dissolving in a water phase buffered solution with pH of 8-9, adding the obtained mixed solution into the reactor, stirring, controlling the temperature to be at 32DEG C-34 DEG C, and beginning reacting, wherein at the beginning of the reaction, the mass volume ratio concentration of the substrate is 0.05-0.2g/ml, and the mass ratio of the added ketoreductase to cofactor to glucose to the substrate is (0.02-0.03):(0.001-0.005):(0.8-1.2):1. Compared with the prior art, the biological preparation method realizes more environment-friendly and mild biological conversion process with high reaction efficiency, and has important application value.

The invention provides a superparamagnetic nanoparticle Fe3O4@SiO2@PSA modified by the PSA and a preparing method and application of the superparamagnetic nanoparticle Fe3O4@SiO2@PSA modified by the PSA. According to the superparamagnetic nanoparticle Fe3O4@SiO2@PSA modified by the PSA and the preparing method and application of the superparamagnetic nanoparticle Fe3O4@SiO2@PSA modified by the PSA, silylanization is conducted on the surface of superparamagnetic nanoparticle Fe3O4, a silylating reagent with a PSA structure is bonded, and thus a PSA group is introduced. The superparamagnetic nanoparticle Fe3O4@SiO2@PSA modified by the PSA and the preparing method of the superparamagnetic nanoparticle Fe3O4@SiO2@PSA modified by the PSA can be applied to the magnetic solid-phase extraction (M-SPE) field, and the superparamagnetic nanoparticle Fe3O4@SiO2@PSA modified by the PSA can serve as an adsorbent which is frequently used for magnetic solid-phase extraction, be applied to various pesticides such as carbamic acid ester, the organophosphorus pesticide and the herbicide and be used for absorption and extraction of target objects such as sulfonamides, organic acid and saccharides; meanwhile, the functional group of the PSA is a good binary ligand, in this way, the PSA is a good chelation material, can be used for extraction of metal ions and has high practical value and broad application prospect in the aspect of analytical investigation.

The invention relates to a synthetic method for romatic carbamic acid ester. The method comprises the following steps: adding diaryliodonium salt, amine, alkali and an organic solvent into a high-pressure reaction kettle, wherein diaryliodonium salt and amine are as raw materials, alkali is used as an accelerator and the organic solvent is used as a solvent; introducing carbon dioxide, and carrying out reaction under stirring at 40 to 150 DEGC for 2 to 24 hours; when the reaction is completed, carrying out cooling to room temperature, then slowly releasing unreacted carbon dioxide to normal pressure, filtering reaction liquid, and carrying out pressure reduced evaporation to remove the solvent so as to obtain a crude product; and carrying out purifying through column chromatography so as to obtain a series of romatic carbamic acid ester compounds. The synthetic method for the romatic carbamic acid ester provided by the invention avoids usage of phosgene or isocyanate, is simple and safe in operation and friendly to the environment, has wide substrate applicability and high yield, employs reusable raw materials, is beneficial for industrial production and has an extensive application scope in pesticides, medicines and natural product syntheses.

The invention relates to a preparation method of antibacterial cellulose fabric, belonging to the technical field of fiber fabric modification. The preparation process comprises the following steps of: dipping the fiber fabric with urea solution, and baking for a period of time at 132-170 DEG C to generate carbamic acid ester group on the surface of the fiber fabric; washing in water, rinsing by using hypohalous acid salt water solution, reacting the carbamic acid ester group on the surface of the fiber fabric with hypochlorite to generate N-halamine structure with strong oxidability, therefore, the cellulose fabric has the antibacterial function. The prepared antibacterial fabric has broad spectrum antibacterial function, and sterilized cellulose fabric can obtain the antibacterial function again after rinsing by using the hypohalous acid salt water solution.

The invention discloses end-capped modified polyformaldehyde resin and a preparation method of the resin. The resin mainly comprises polyformaldehyde, polyfunctional group isocyanate end capping agent, antioxidant, formic acid absorbent, formaldehyde absorbent, lubricating agent and the like. The end-capped modified polyformaldehyde resin is characterized in that isocyanate compounds are used as the end capping agent, polyformaldehyde can directly react with isocyanate group in extrusion process by using the reaction of the isocyanate compounds with the compounds containing active hydrogen and adopting a melt extrusion manner of an exhaust double-screw extruder, so as to form stable carbamic acid ester bonds to carry out end capping on original unstable group ends and newly-generated unstable group ends in the resin, thus reaching a better stabilization effect of end groups, improving heat stability of the resin, being capable of effectively preventing breakage of molecular chains in the end group stabilization process, and being beneficial to keeping resin molecular weight.

The invention relates to an integrated circuit (IC) card packaging special hot melting adhesive tape and a preparation method thereof. The IC card packaging special hot melting adhesive tape and the preparation method thereof are characterized in that the IC packaging special hot melting adhesive tape is composed of, by weight, 75-90 parts of modified polyamide hot melting adhesives and 10-25 parts of heat conduction fillers, and the preparation method of the hot melting adhesive tape includes preparing a modified polyamide hot melting adhesive solution, compounding a heat conduction filler dispersing liquid, uniformly mixing the modified polyamide hot melting adhesive solution and the heat conduction filler dispersing liquid based on a proportion, and performing a coating so as to prepare the hot melting adhesive tape. The IC card packaging special hot melting adhesive tape and the preparation method thereof have the advantages that the design is reasonable, the modified polyamide hot melting adhesive and the modified heat conduction fillers are utilized to prepare the hot melting adhesive tape, the melting and the cooling are rapid, besides, a molecular structure contains carbamic acid ester which is a basic group of a polyurethane material, a continued and effective adhesive bonding between the hot melting adhesive tape and a polyvinyl chloride (PVC) material can be achieved, and hot melting adhesive tape can greatly meet requirements for production efficiency and adhesive bonding effect of the IC card packaging.

The invention relates to an efficient liquid phase chromatogram stationary phase which is characterized in that gel in the structure is a particle with hydroxyl, R1 is methyl or ethyl, m is equal to 3-8 and n is equal to 3-29. The liquid phase chromatogram stationary phase has the following advantages: 1, the structure is novel, a polar carbamic acid ester structure is embedded in a hydrophobic carbon chain, wherein an alkyl is at the tail end of an ester bond of the carbamic acid ester (O-alkyl), so that the effect of silicon hydroxyl on the surface of filler on separation can be benefited to being eliminated due to the principle of electrostatic screening, and the compatibility of chromatograph filler and pure water moving phase can be improved; 2, the preparation process for the stationary phase is simple and reliable, and the raw material is easy to obtain, thus being beneficial to batch production of the stationary phase; and 3, the liquid phase chromatogram stationary phase has wide application range. The stationary phase is a pervasive reversed phase chromatography stationary phase, has good analysis property to most polar and nonpolar compound, and has good market application prospect. The invention discloses a preparation method thereof.

The invention relates to an ionic liquid compound electrolyte material. Organic lithium borate/lithium aluminate and organic compound having the structure of carbamic acid ester compose the ionic liquid material which is used as a substrate, the composition and ratio of lithium salt to organic compound of the ionic liquid system are adjusted, and addition reaction with high molecular material and organic solvent is carried out to prepare all-solid-state or gel state polymer compound electrolyte. The electrolyte material has excellent thermostability, broad electrochemical window and high ion conductivity, is superior to existing non-aqueous organic liquid electrolyte applied to commercialized lithium ion battery especially in the aspect of safety, and has wide application prospect in lithium ion battery, electrochemical super capacitor, etc.

The invention discloses a preparation method of a catalyst for synthesizing diphenyl carbonate, and belongs to the technical field of catalyst synthesis. The catalyst is obtained by modifying a transition metal oxide by poly-electrolyte until the transition metal oxide is positively or negatively charged, and wrapping a layer of metal organic framework (MOFs) on the outer surface of the transition metal oxide by an electrostatic layer-by-layer self-assembling method, namely the oxide is used as a core, and the MOFs is used as a shell; the catalyst is MalphaObeta@MOFs fort short (M is one of transition metal elements, and alpha and beta are valences). The catalyst is enabled to react with ammonia chloride with a certain concentration to convert the core MalphaObeta into corresponding chloramine salt M(NH3)nClbeta (n is the number of ammonia molecules and is equal to 1 to 8); after ammonia is removed by low-temperature roasting, the catalyst MClbeta@MOFs is obtained. The catalyst can be used in a system for generating diphenyl carbonate by transesterification between urea or carbamic acid ester and phenol; new coordination adsorption is performed on the catalyst and ammonia generated by the reaction system to push the reaction to move rightwards; the yield of a diphenyl carbonate product is up to 90 percent or above; after the catalyst is used for 5 times, the catalysis effect is still good.

The invention relates to the technical field of analytical chemistry and discloses a method for detecting afatinib dimaleate isomer and main degradation impurities through a high performance liquid chromatography.According to the method, afatinib dimaleate raw materials or preparations are compounded into a detection solution with diluent, bonding amylose-trichlorobenzene carbamic acid ester serves as a stationary phase, a normal hexane-ethanol-organic base solution serves as a mobile phase for isocratic elution, and an HPLC spectrogram is recorded under afatinib absorption wavelength.According to the method, a chromatographic column with trichlorobenzene carbamic acid ester serving as a filling material, the normal hexane-ethanol-organic base solution serves as the mobile phase, the content of isomers existing in afatinib dimaleate and preparations thereof can be measured quantitatively, afatinib, the isomers and the main impurities can be separated completely, the peak pattern is good, the method meets the specifications in Chinese Pharmacopoeia, quality of afatinib dimaleate and afatinib dimaleate preparation products is effectively controlled, and the method is great in specificity, high in sensitivity and good in accuracy.

The invention discloses a composite collecting agent for bulk floatation of copper sulfide molybdenum ores. The collecting agent is a stable oily product which is formed by mixing 50%-70% of thiocarbamic acid ester, 2%-10% of thiophosphoric acid ester, 10%-30% of mixed non-polar hydrocarbon oil and 10%-20% of terpene alcohol. The collecting agent has the advantages that the thiocarbamic acid ester has the selective chelation on the exposing active points, such as copper and molybdenum, on the surfaces of minerals, the thiophosphoric acid ester has the selective adsorption function on the copper-containing minerals, the non-polar hydrocarbon oil can be adsorbed on the surface of the copper sulfide molybdenum ores through the Van der Waals force, and the terpene alcohol is a solution medium and has good air bubble property, so under the synergistic effect of the thiocarbamic acid ester, the thiophosphoric acid ester, the mixed non-polar hydrocarbon oil and the terpene alcohol, a good ore selection index can be obtained, and the agent mechanism is simplified; the collecting agent is used at the ore slurry temperature of 5-35 DEG C, and the usage amount is between 80-160g/t according to the change of the contents of usable minerals in the ores.

The invention relates to a nano sensitive material which is used for monitoring carbamic acid ester pesticides. The nano sensitive material is characterized by comprising MnO2, Cr2O3 and PbO nano powders doped with Pd, wherein the content ranges of doped Pd, MnO2, Cr2O3 and PbO are respectively are 0.8-2.5% , 40-45%, 34-40% and 19-24%, wherein the particle size is smaller than 35 nm. A carbamic acid ester pesticide sensor made of the sensitive material provided by the invention has wide linear range, good selectivity and high sensitivity, and can be applied to the online monitoring and measurement of the carbamic acid ester pesticides without being influenced by coexisting substances.

The invention provides nano coating comprising nano dispersion liquid, light-cured resin and auxiliaries. The nano dispersion liquid at least comprises nano materials and dispersants, the dispersants account for 5-50% of the weight of the nano materials, and the light-cured resin accounts for 100-600% of the weight of the nano materials. The auxiliaries at least comprise photoinitiators, adhesion promoters, flatting agents, surface anti-wear agents and diluting solvent. The dispersants and the light-cured resin form ionic bond or covalent bond combination, and chemical bonds at least include ester bonds, urea bonds, carbon-carbon bonds, carbon-nitrogen bonds and chemical bonds having the structural characteristics of -o-, carbamic acid ester, acid amide, acid imide, oxazolidinone and the like, so that re-agglomeration of the nano materials in films can be avoided, and further stability and weather resistance of the nano functional films are improved, and the service life of the nano functional films is prolonged. The nano coating further has the advantages of high visible light transmittance, high infrared barrier rate and high ultraviolet absorption rate.

The invention discloses a flotation method for comprehensively recovering copper gold from copper tailings, and belongs to the technical field of flotation. The flotation method comprises the following steps that copper tailings are ground, flotation reagents which comprise lime, sodium sulphide, TK309 regulators, sodium n-butylxanthat, O-isoamyl-N-allyl sulfo-carbamic acid ester, methyl isobutylcarbinol and other flotation reagents are added for slurry mixing, primary rough selection, three-time scavenging, three-time concentration and fine scavenging operation are sequentially carried out,and finally copper ore concentrate is obtained. The copper grade is improved by 3-5% compared with a conventional flotation method, and the copper recovery rate is improved by 4-6%. The associated gold content reaches above the pricing grade (1g/t), and the gold recovery rate is improved by 4-10%. According to the flotation method, the problems that the stockpiling time is long, the components arecomplex, the particle size of the useful mineral embedding cloth is fine, the weathering oxidation of the vulcanized minerals and the mineralization of the gangue minerals are serious, and the coppertailings contain easily-floating iron minerals and calcium-magnesium gangue are solved, the copper concentrate copper, the gold grade and the recovery rate are remarkably improved, and the waste of copper and gold resources is reduced.

Provided are a washed flexible resin plate capable of achieving laser direct imaging and a preparation method thereof. A photosensitive elastic member of the washed flexible resin plate capable of achieving laser direct imaging is composed of thermoplastic elastic member (A), polybutadiene with end achieving carboxylation (B), polybutadiene with end achieving carboxylation (C), a copolymer (D) of styrene with a side chain containing carbamic acid esterification hydrophilic poly ethoxy-acrylonitrile-poly ethoxy methyl acryloyl oxygen ethyl isocyanate, polymerizable vinyl monomers and a compound of the polymerizable vinyl monomers (E), infrared laser dye (F) and initiating system (G) composed of radical initiators and cation initiators. The system can prepare the environment-friendly washed flexible resin plate which is capable of achieving laser direct imaging and being washed by water and high in sensitivity.

The invention relates to an organophosphorus modified waterborne polyurethane flame retardant coating agent and a preparation method thereof, and belongs to the technical field of light industry. The organophosphorus modified waterborne polyurethane flame retardant coating agent is characterized by being prepared from the following steps: using organophosphorus polyatomic alcohol to be in reaction with diisocyanate instead of non-flame-retardant polyatomic alcohol; using a hydrophilic chain extender to perform chain extension on the material obtained after reaction; neutralizing the obtained mixture by a salt-forming agent, wherein the non-flame-retardant polyatomic alcohol is a mixture of any one kind or any kinds of polyester polyol or polyether polyol. According to the organophosphorus modified waterborne polyurethane flame retardant coating agent and the preparation method thereof, two ends of the organophosphorus polyatomic alcohol contain hydroxy of activated hydrogen, so that the organophosphorus polyatomic alcohol can partially replace the polyatomic alcohol to be reacted with isocyanate so as to generate carbamic acid ester; an organophosphorus flame retardant intermediate is led in the macromolecular chain of the polyurethane, so that a flame retardant macromolecule having the performances of environmental protection, no halogen and low toxicity is formed.

An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention discloses a process for producing an isocyanate by subjecting a carbamic acid ester to a thermal decomposition reaction, including the steps of: recovering a low boiling point component in a form of a gaseous phase component from a thermal decomposition reaction vessel in which the thermal decomposition reaction is carried out; recovering a liquid phase component containing a carbamic acid ester from a bottom of the thermal decomposition reaction vessel; and supplying all or a portion of the liquid phase component to an upper portion of the thermal decomposition reaction vessel.

The invention relates to quick test paper for organic phosphorus and carbamic acid ester type pesticide residues. The technical scheme of the quick test paper is as follows: the test paper is made by the temperature-sensitive microcapsule technology; and encapsulated cholinesterase is released in a special temperature clinical region to catalyze indophenol acetate to hydrolyze and develop color; therefore, the pesticide residue condition is determined. The quick test paper is disposable and low in price; a reagent is not needed to prepare and the maintenance work of the analytic instrument is omitted; the test paper is simpler than manual pressing in use and the result determination is clear at a glance without training; the dosage of the reagent is low, the detection time is short and the detection can be completed in 1 minutes; the cholinesterase is stable under the protection of microcapsules and long in storage time; the thermal environment in the range from 37 to 40 DEG C of solution is easy to realize, and the temperature is quite convenient and accurate to control, and insufficient moisture and too low temperature situations can not occur; besides, the quick test paper is convenient for popularization, and is the first choice for places such as farm product market, supermarket, school, hotel, factory and the like to quickly detect pesticide residues.

The invention discloses an additive for wear resistance of lubricating oil, which comprises the following components in part by weight: 15 to 35 parts of antiwear agent, 6 to 29 parts of detergent dispersant and 12 to 26 parts of antioxidant preservative, wherein the antiwear agent consists of boric acid tributylester, phosphonic acid dibutyl ester, copper isooctoxyborate and cupric cyclohexoxylborate; the detergent dispersant consists of polybutene amine, polyisobutene carbamic acid ester and 2-aminopyridine; and the antioxidant preservative is boronized butanimide. The additive has wide use range, can be used in paraffin, naphthene and intermediate base oil, and also can be used in synthetic and semi-synthetic base oil. The additive has the advantages of effectively improving the wear resistance of the lubricating oil, strengthening the bearing capacity of the lubricating oil, making the lubricating oil have long service life, and having small dosage in the lubricating oil and simple and convenient preparation process.

The invention relates to an environment-friendly polyolefin cable material for the power field and a production method of the environment-friendly polyolefin cable material. The environment-friendly polyolefin cable material is characterized by being prepared from, by mass, 1-3% of carbamic acid ester, 1-3% of eugenol, 1-3% of compatilizer, 1-3% of color master batches and the balance flame-retardant polyolefin master batches. The carbamic acid ester and the eugenol are contained in the environment-friendly polyolefin cable material and are in synergistic effect, and thus the pest prevention and pest killing effects are remarkable; the technology is simple, and production and popularization are easy.

The invention discloses a making method of catalyst of isocyanate through heat decomposing aromatic amino formic ether, which is made of bismuth monomer, oxide, sulfate, halogen or salt. The method improves receiving rate and transmitting rate, which is easy to separate from reacting liquid.

The invention relates to a calorimetric method for detecting pesticides by using acetylcholin esterase. According to the technical scheme, an enzymatic inhibition method and cascade reaction are adopted; the acetylcholin esterase is suppressed by pesticides, so that the enzymatic reaction rate is reduced; the quantity of choline products is reduced and is in direct proportion to the suppression degree; and furthermore, the amount of the choline can be obtained by cascade reaction heat of choline oxidase and catalase. By using the cascade reaction, the intensity of an original thermal signal as well as the detection sensitivity and the detection resolution are greatly improved, the detection limit is reduced, and the detection accuracy is effectively improved; a pesticide detection calorimetric method based on the acetylcholin esterase is realized; the advantages of high sensitivity of the acetylcholin esterase to organophosphorus and carbamic acid ester type pesticides and no interference caused by electrochemical active substances or colors and turbidity of the sample on the calorimetric method are integrated; the in-site quick pesticide residue detection is facilitated; and the large-scale application is facilitated.