285 results about "Formamide" patented technology

The invention discloses a high-weatherability sound insulation wood plastic wallboard and a preparation method thereof, the high-weatherability sound insulation wood plastic wallboard comprises the following raw materials by weight: 30-40 parts of wood flour or plant fiber, 25-35 parts of a sound insulation functional filler, 35-45 parts of high density polyethylene, 2-2.5 parts of maleic anhydride grafted high density polyethylene, 1-1.5 parts of stearic acid, 3-4.5 parts of a weatherability auxiliary agent, and 1-1.5 parts of azodicarbonamide. The problems of cracking, deformation and the like caused by moisture absorption expansion are relieved by optimizing the proportion and compatibility of the wood flour and the plastic, and then the problems of weather resistance and sound insulation of the wallboard outdoors are solved by filling the porous sound absorption material.

The invention belongs to the technical field of ETFE film preparation, and particularly relates to a preparation method of a high-strength ETFE film. The preparation method of the ETFE film comprises the following steps: preparing a mixture of modified nano cellulose and calcium magnesium silicate whiskers; carrying out modification treatment on the poly (p-benzamide) fiber; and preparing the ETFE film. According to the preparation method of the high-strength ETFE film, the perfluoroalkoxy copolymer and the ETFE resin are selected and mixed for use, during melt extrusion, the perfluoroalkoxy copolymer can lubricate the ETFE and reduce the overall melt viscosity, the critical shear rate of the perfluoroalkoxy copolymer is higher than that of the ETFE, melt fracture can be inhibited, the film is evenly extruded, the flatness of the film surface is improved, and the high-strength ETFE film is prepared. And meanwhile, the elastic retraction of the ETFE is inhibited during high-temperature setting. And the modified nano cellulose and calcium magnesium silicate whisker mixture and the modified poly-p-benzamide fiber are added to enhance the mechanical strength of the prepared ETFE film.

There is provided an alkali metal salt of 4-chloro-N-[2-[(4-chlorophenyl)methyl]-3-oxo-1,2,4-thiadiazol-5-yl]benzamide and formulations thereof. This salt finds particular utility in the treatment or prevention of a disorder or condition ameliorated by the activation of AMPK.

A method of remediating wastewater is provided, the method comprising substantially submersing an electrocatalytic reactor in wastewater, the electrocatalytic reactor including an anode, which is mesh and defines a first bore, a filter layer, which is porous glass, carbon fiber or poly-paraphenylene terephthalamide, the filter layer including fibers and interstitial spaces between the fibers, an iron-doped titanium dioxide film on the fibers, the film including a surface that is substantially iron oxide free, the filter layer housed within the first bore and defining a second bore, a cathode, which is housed within the second bore, is mesh and defines an inner bore, and a perforated air tube housed within the inner bore; and providing at least a voltage of at least about 3 volts to the electrocatalytic reactor, in the absence of a light source, thereby remediating wastewater.

The invention relates to the technical field of shoe materials, in particular to a bio-based EVA-containing composite shoe material and a preparation method thereof, and the bio-based EVA-containing composite shoe material is prepared from the following raw materials in parts by weight: a bio-based EVA polymer, bio-based TPU, a cross-linking agent, a compatilizer, a nucleating agent, filler, a foaming agent, a plasticizer, a flexible component, a biodegradation accelerant, a non-polyolefin elastomer and maleic anhydride grafted polyethylene wax. Wherein the compatilizer can be ethylene-vinyl alcohol and the like; the nucleating agent can be nanoscale talcum powder and the like; the filler can be ethyl cellulose and the like; the foaming agent is an azodicarbonamide foaming agent; the biodegradation accelerant is prepared from immobilized lipase, a tannic acid-Fe < 3 + > complex and surface carboxylated TiO2. The preparation method comprises two steps of mixing granulation and supercritical foaming. The composite shoe material provided by the invention has good biodegradability, can reduce environmental pollution, and maintains excellent physical and mechanical properties at the same time.

The invention belongs to the field of medicine, health and health, and particularly relates to a preparation method for controllably synthesizing polysulfonic acid mucopolysaccharide with different molecular weights, which comprises the following steps: reaction, acid-base neutralization, formamide removal by alcohol precipitation, desalting and freeze-drying. Wherein the reaction process comprises the following steps: adding sodium chondroitin sulfate and a pyridine sulfur trioxide complex into a mixed solvent of N, N-dimethylformamide and dimethyl sulfoxide, and heating for reaction to obtain a reaction mixture; the volume fraction of the dimethyl sulfoxide in the mixed solvent is 0-80%. According to the method, the low-price pyridine sulfur trioxide complex (about 150 yuan / 500g) is used, and the ratio of N, N-dimethylformamide to dimethyl sulfoxide in the mixed solvent is adjusted, so that the solubility of the chondroitin sulfate sodium and the pyridine sulfur trioxide complex is changed, and the polysulfonic acid mucopolysaccharide with molecular weights in different ranges can be regulated and generated.

The invention relates to the technical field of sound insulation materials, in particular to flame-retardant epoxy resin composite diatomite sound insulation cotton and a preparation method thereof. The flame-retardant epoxy resin composite diatomite sound insulation cotton is prepared from epoxy resin, diatomite, a composite flame retardant, a coupling agent, a curing agent, a diluent, a foaming agent and a charring agent. The composite flame retardant at least comprises ammonium polyphosphate and melamine; the coupling agent is a silane coupling agent or a titanate coupling agent; the curing agent is methyl tetrahydrophthalic anhydride; the diluent is n-butyl glycidyl ether; the foaming agent is azodicarbonamide; the charring agent is pentaerythritol. By optimizing the diatomite modification process and combining physical dispersion and chemical modification means, the compatibility of the diatomite and the epoxy resin is greatly improved, the pain point of filler agglomeration in the traditional process is thoroughly solved, the porous sound insulation potential of the diatomite is fully released, and the sound absorption and sound insulation performance of the material is qualitatively improved.

The invention relates to the technical field of foaming materials, in particular to a high-damping EVA / EPDM composite foaming material and a preparation method thereof. The high-damping EVA / EPDM composite foam material is prepared from the following raw materials in parts by weight: 150 to 80 parts of ethylene-vinyl acetate copolymer, 20 to 50 parts of ethylene propylene diene monomer, 3 to 5 parts of azodicarbonamide, 1 to 3 parts of dicumyl peroxide, 10 to 12 parts of compound filler, 6 to 10 parts of maleic anhydride grafted ethylene-octylene copolymer, 2 to 4 parts of hydroxyl-terminated polybutadiene and 1 to 4 parts of triallyl isocyanurate, the compound filler is formed by compounding silicon dioxide microspheres, graphene aerogel microspheres and modified barium titanate nanoparticles according to the mass ratio of 1: (1.5-1.7): (1.5-1.8); the high-damping EVA / EPDM composite foam material prepared by the invention not only has better high-damping and low-resilience properties, but also has excellent tensile strength, and the quality of the high-damping EVA / EPDM composite foam material is effectively ensured.

The present application relates to the technical field of resin preparation, and relates to a preparation method of an anticoagulant superabsorbent resin, which comprises the following steps: combining hydrolyzed tannic acid and nanocellulose through an oxidative coupling reaction, loading citric acid to obtain an anticoagulant compound; dissolving acrylic acid, sulfonated lignin, the anticoagulant compound, polylactic acid-diacrylate, azodicarboxamide, nanosilica and a photoinitiator in water to obtain a mixed solution; injecting the mixed solution into a microchannel reactor to perform a polymerization reaction under irradiation of pulsed ultraviolet light, so as to obtain a superabsorbent resin gel; immersing the superabsorbent resin gel in a polylactic acid-diacrylate solution, performing surface crosslinking through ultraviolet light irradiation, drying and grinding, so as to obtain anticoagulant superabsorbent resin particles; and the present application can inhibit platelet aggregation, delay the start of the coagulation cascade reaction, block the activation of coagulation factors, effectively prolong the blood clotting time, and provide a more sufficient liquid absorption window for the superabsorbent resin.

The invention discloses a method for detecting related substances in imaric acid dihydrochloride by HPLC (High Performance Liquid Chromatography), and belongs to the technical field of chemical engineering and pharmacy, the related substances in the imaric acid dihydrochloride are detected by high performance liquid chromatography, a phosphate buffer solution (0.05 mol / L of monopotassium phosphate solution, and pH adjusted to 2.5 by phosphoric acid) is used as a mobile phase A, acetonitrile is used as a mobile phase B, gradient elution is carried out, the flow rate is 1.0 ml / min, the detection wavelength is 250nm, and the detection wavelength is 250nm. The column temperature is 40 DEG C, and the detection wavelength is 235nm; the method can be used for effectively separating and quantitatively detecting imatamide, demethylated imaric acid dihydrochloride, ortho-imaric acid, meta-imaric acid, p-hydroxymethyl benzamide, an intermediate B, p-hydroxymethyl benzoic acid, an imaric acid dimer, p-cyanobenzyl alcohol, p-chloromethyl benzamide, p-toluic acid and p-chloromethyl benzoic acid in the imaric acid dihydrochloride. The method disclosed by the invention is simple and convenient to operate, strong in specificity, high in sensitivity and accuracy, good in linearity and capable of effectively controlling the quality of a p-imaric acid dihydrochloride product.

The invention relates to the technical field of spiro compounds, in particular to an 8, 8-difluoro-2-oxaspiro [4, 5] decane-1, 3-diketone compound as well as a preparation method and application thereof. The invention provides the 8, 8-difluoro-2-oxaspiro [4, 5] decane-1, 3-diketone compound, the compound shows excellent biological activity, and through test comparison, when the mass concentration is 0.1 mu g / mL, the insecticidal effect of the compound is increased by nearly 10% compared with that of a common insecticide chlorantraniliprole. It means that the compound shows a more efficient insecticidal effect on lepidoptera pests such as plutella xylostella and the like under a lower dosage, and cost reduction and synergism are realized. Due to the characteristic, the compound or the agronomically acceptable salt thereof shows important potential application value in the field of insecticides, and a new thought is provided for upgrading and updating of insecticides in the future.

The invention provides a composition, which comprises chlorantraniliprole, chlorfenapyr and at least one insecticidal compound, and the insecticidal compound is selected from cyanoimide, m-diamide, isoxazoline or oxadiazine. The invention also provides a preparation method of the composition.

The invention relates to the technical field of polymer foam materials, and discloses a light EVA foam material based on intermittent foaming heating and a preparation method thereof. The ethylene-vinyl acetate copolymer adhesive is prepared from the following raw materials: an ethylene-vinyl acetate copolymer, a maleic anhydride grafted ethylene-vinyl acetate copolymer, azodicarbonamide, basic zinc carbonate, triallyl isocyanurate, stearic acid and dicumyl peroxide. During preparation, a double-machine-position stepped heating and mechanical mode locking transfer process is adopted. The first-stage heating is initiated by dicumyl peroxide to construct a covalent cross-linked skeleton; in the second-stage foaming heating process, basic zinc carbonate is heated and decomposed, and anhydride groups are promoted to be hydrolyzed and combined with released zinc oxide in situ to form ionic crosslinking. A double-order cross-linked network formed by covalent bonds and ionic bonds can absorb bubble expansion stress and stabilize an internal microstructure. According to the invention, the occurrence rate of cell merging and cracking under the condition of low density is reduced, and the foaming material with low apparent density and small compression set rate is obtained.

The invention belongs to the technical field of daily plastic products, and particularly relates to a high-temperature-resistant reinforced transport case material and a preparation method thereof. The transport case is prepared from the following raw materials in parts by mass: 88 to 100 parts of polypropylene, 8 to 12 parts of PP-g-ITA, 7 to 10 parts of PP-g-AN, 0.05 to 0.2 part of an aryl dicarboxamide nucleating agent, 5 to 8 parts of fibers, 3 to 5 parts of mica powder, 0.2 to 0.5 part of an antioxidant, 0.1 to 0.2 part of a benzotriazole ultraviolet absorbent, 0.2 to 0.3 part of a silane coupling agent, 0.1 to 0.2 part of polyethylene wax, 0.2 to 0.4 part of calcium stearate and 0.1 to 0.3 part of pentaerythritol stearate. The preparation method of the high-temperature-resistant reinforced transport case material is simple, and a transport case prepared from the high-temperature-resistant reinforced transport case material is excellent in thermal stability, weather resistance and mechanical property.

This invention discloses a method for preparing a three-dimensional integrated lumbar support cushion. The raw materials of the lumbar support cushion include: ethylene-vinyl acetate copolymer, polyether-type thermoplastic polyurethane elastomer, physically foamed microspheres, azodicarbonamide, caprolactam-blocked 4,4'-diphenylmethane diisocyanate, surface-modified copper nanowires, and silver-loaded silicone composite components. The preparation process is as follows: the matrix resin and modified copper nanowires are melt-blended at high temperature, and then mixed with the foaming system, crosslinking agent, and composite components at low temperature to obtain a blended base material; the blended base material is injection molded, followed by static differential temperature field for pressure holding and curing, and finally cooled and demolded. This invention utilizes copper nanowires to construct a thermally conductive network, which, combined with the external temperature difference, forms a continuous foaming ratio and crosslinking density gradient inside, eliminating the physical phase interface of traditional multi-material splicing, significantly improving the tear resistance and fatigue life of the transition zone; and utilizes cooling phase separation to form an anti-slip and antibacterial skin layer.

The application provides a method for detecting psychotropic drugs in environmental sludge based on acid pretreatment, which comprises the following steps: S1: obtaining a sludge sample to be detected, performing pressurized fluid extraction on the sludge sample to be detected after freeze-drying to obtain an extraction solution, performing solid-phase extraction on the extraction solution to obtain an eluate, and redissolving the eluate to obtain a solution to be detected, wherein the pressurized fluid extraction is performed under the condition of 5 ‰ formic acid water without heating; and S2: performing liquid chromatography mass spectrometry on the solution to be detected to obtain a mass spectrum, wherein the psychotropic drug is one of eptazocine, codeine, AMP, MAMP, MDA, monoacetylmorphine, MDMA, PMMA, fentanyl, norfentanyl, ketamine, norfentanyl, benzoyl eptazocine, cocaine and tramadol, and the method realizes detection of multiple psychotropic drugs in environmental sludge.

The present invention relates to a process for producing poly(anthranilamide) by polymerization of isatoic anhydride on a starter, preferably in the presence of a solvent, at a reaction temperature in the range of 110°C to 300°C, the starter comprising an aliphatic mono- or diamine containing 5 to 13 carbon atoms, an araliphatic mono- or diamine containing 7 to 15 carbon atoms, an aromatic diamine containing 6 to 13 carbon atoms, a carboxylic acid amide of the formula Ar-(C=O)NHR, where Ar represents an amine NH group or an aromatic group substituted with an NH group, and R represents an aromatic or aliphatic group, or a mixture of the above-mentioned starters, and where a solvent, if used, comprises an organic solvent that is liquid at the reaction temperature, an ionic liquid, or a mixture of these solvents, to obtain poly(anthranilamide) based on the starter. The present invention also relates to the poly(anthranilamide) obtained by the process according to the invention and to its use in the production of fibers or composite materials.

This invention relates to the field of slow rebound foam technology, and particularly to a slow rebound foam based on waste PET polyether polyol, and its preparation method. The waste PET-based polyether polyol is obtained from bis(2-hydroxyethyl) terephthalamide obtained by aminolysis of waste PET as a starting material. This not only enables the recycling and reuse of waste PET, but also allows it to be used as a foaming material for slow rebound foam. The composite polyether is composed of polyether polyol I, polyether polyol II, waste PET-based polyether polyol, and polymer polyol. By adjusting and controlling parameters such as functionality, molecular weight, hydroxyl value, viscosity, and propylene oxide content of the waste PET-based polyether polyol, it can be stably stored at room temperature without crystallization. When used as the soft segment of slow rebound foam, it significantly improves the low-temperature resistance of the slow rebound foam, avoiding the problems of slow rebound polyurethane foam hardening and becoming difficult to cut in winter, as well as poor resilience.

The invention discloses sodium caprylate and a preparation method and application thereof, the sodium caprylate is 8-(2-(2-hydroxyethoxy) benzamido) sodium caprylate, the 8-(2-hydroxybenzamido) sodium caprylate and 2-iodoethanol are subjected to a reaction in an organic solvent containing inorganic base to prepare the sodium caprylate, and the sodium caprylate can be used as a penetration enhancer in an oral administration system. And when the semeglutide oral soluble film is used for preparing the semeglutide oral soluble film, the semeglutide oral soluble film shows a very good in-vitro disintegration effect and a very good permeation promoting effect in animal experiments. The preparation method of the 8-(2-(2-hydroxyethoxy) benzamido) sodium caprylate is simple, does not involve expensive reactants, is convenient for post-treatment, and is beneficial to large-scale production.

To provide a compound that expands the spectrum of pesticides.SOLUTION: Provided is a compound represented by formula (b*): (in the formula, E is hydrogen or a C1-C6 alkyl group; A is -CN, chlorine, or fluorine; and L is S, SO, or SO2).SELECTED DRAWING: None

The invention relates to a composite sponge for an automobile engine hood and a preparation method of the composite sponge. The composite sponge is prepared from the following components in parts by weight: 100 to 130 parts of polyurethane prepolymer, 20 to 30 parts of bismaleimide and furyl polyether copolymer, 12 to 20 parts of 6-(diphenoxy phosphine)-6H-dibenzoxphosphine or a derivative thereof, 12 to 20 parts of ammonium polyphosphate, 8 to 15 parts of nano silicon dioxide or montmorillonite, 12 to 20 parts of self-healing microcapsule, 1 to 3 parts of azodicarbonamide and 1 to 2 parts of zinc stearate. And 5 to 8 parts of a diisocyanate crosslinking agent. Wherein the self-healing microcapsule takes an aromatic ester or epoxy prepolymer as a core material and a urea formaldehyde condensate as a shell material, and the particle size is 20-80 microns. All the components are compounded under a specific process path to form a foam network structure with high-temperature shape memory and self-healing functions and efficient flame retardance, and the foam network structure is suitable for thermal protection application of an automobile engine compartment under complex working conditions.

The invention provides an insecticidal composition containing an active component A and an active component B. The active component A is chlorantraniliprole, the active component B is a compound shown as a formula I (formula I), the mass ratio of the active component A to the active component B is (1-30): (1-30), the insecticidal composition further comprises an auxiliary agent, the active component accounts for 1%-50% of the weight of the insecticidal composition, and the auxiliary agent accounts for 1%-50% of the weight of the insecticidal composition. The insecticidal composition is used for preventing and treating agricultural pests, has an obvious synergistic effect, and can reduce the dosage and delay the occurrence of pest resistance to drugs.

The invention provides a crystal form I of chlorantraniliprole, a preparation method of the crystal form I, a pharmaceutical preparation and a pesticide composition, and the crystal form I of chlorantraniliprole is an N, N-dimethylacetamide solvate of chlorantraniliprole. According to the chlorantraniliprole crystal form I, the biological activity of chlorantraniliprole is improved, the problem of drug resistance of pests to chlorantraniliprole is effectively solved, and the use amount of chlorantraniliprole is reduced.

The present invention relates to stable synergistic insecticidal composition for synergistic and effective control of various insect pests including entire sucking pests complex. The present invention also relates to a process for preparation thereof.

The invention relates to the field of foamed plastic preparation, in particular to an environment-friendly noise-reducing pmi foamed plastic preparation method which comprises the following steps: 1, mixing a polybenzimidazole monomer, a catalyst and a polar solvent according to an optimal ratio of 4: 1: 2, and carrying out polymerization reaction under the conditions of the temperature of 180-250 DEG C and the pressure of 0.5-1.5 MPa to form a PMI resin prepolymer, in the reaction process, a proper amount of a noise reduction auxiliary agent is added at 200 DEG C to promote the noise reduction effect of the foam material. The environment-friendly raw materials are adopted, the specific catalyst (sodium chloride, ammonium chloride and the like), the foaming agent (azodicarbonamide) and the surfactant (lauryl sodium sulfate) are utilized, the raw materials show the characteristics of low toxicity and harmlessness in production and final products, the modern environment-friendly requirement is met, the influence on the environment is reduced, and the environment-friendly and environment-friendly foaming agent is suitable for industrial production. Therefore, the problem that a PMI foam material with excellent noise reduction performance is difficult to prepare by an existing noise reduction pmi foam plastic preparation method is solved.

The utility model relates to the technical field of stirring devices, and discloses a mixing stirrer for azodicarbonamide, which comprises a large helical ribbon and a small helical ribbon, the head end of the large helical ribbon and the head end of the small helical ribbon are respectively and fixedly connected to one side of a rotating shaft through a first connecting pipe and a second connecting pipe; the tail ends of the large helical ribbon and the small helical ribbon are fixedly connected to the other side of the rotating shaft through a third connecting pipe and a fourth connecting pipe correspondingly, one end of the rotating shaft is rotationally connected to one end of a water inlet main pipeline in a sealed mode, and the other end of the water inlet main pipeline is fixedly connected with the output end of a circulating water cooling mechanism; the other end of the rotating shaft penetrates out of the outer side of the box body and is rotationally connected with one end of a water outlet main pipeline in a sealed mode, the other end of the water outlet main pipeline is fixedly connected with the input end of a circulating water cooling mechanism, a U-shaped water tank shell is fixedly connected to the bottom of the box body, and a water inlet branch pipeline is fixedly connected to one side of the top end of the U-shaped water tank shell; the diagonal sides of the top end of the U-shaped water tank shell are fixedly connected with water outlet branch pipelines, and the material cooling function is achieved through a water circulation mechanism.

The invention discloses an antibacterial moisture-permeable polyester material and a preparation method thereof, and belongs to the technical field of polyester materials. The antibacterial moisture-permeable polyester material is prepared from the following raw material components in parts by mass: 100 parts of antibacterial polyester, 4 to 8 parts of super absorbent resin, 0.4 to 0.6 part of antioxidant and 3 to 5 parts of porous filler, the antibacterial polyester is obtained by at least taking unsaturated dibasic acid monomers and polyol monomers as raw materials, butyl titanate as a catalyst and hydroquinone as a polymerization inhibitor, carrying out esterification and polycondensation, then carrying out bromine addition, and finally reacting with N, N-dimethyl-3-nitrobenzamide. The superabsorbent resin is synthesized by taking a starch-based raw material, acrylamide and N-(4-nitrophenyl) acrylamide as reaction monomers, N, N '-methylene bisacrylamide as a cross-linking agent and ceric ammonium nitrate as an initiator, and the porous filler is prepared by firstly synthesizing an imidazolyl ionic liquid from trimethylimidazole and chloromethylnaphthalene and then adopting an external cross-linking method.

The present invention provides a low-degradability foramsulfuron suspension composition, its preparation method, and its use. The composition has a low decomposition rate for the active ingredient foramsulfuron and passes physical and chemical performance tests such as persistent foaming, pourability, wet sieve test, and dispersion stability. The composition can be used to effectively control a variety of weeds.

The application discloses a benzyl benzoyl or fluorinated alkane substituted phenol compound and a synthesis method and application thereof, and belongs to the technical field of drug synthesis. The synthesis method comprises the following steps: step one, 0.3mmol of o-aminobenzamide, 0.3mmol of ketone, 10mol% of I2 and 5mL of anhydrous ethanol are added into a 10mL round-bottom flask at one time, stirring is carried out at 80 DEG C for 24h, after the reaction is completed, the reaction liquid is poured into ice water, the volume ratio of the reaction liquid to the ice water is 1:10, ethyl acetate is extracted, the organic layer is washed with saturated brine, dried with anhydrous Na2SO4, and spin-dried to obtain a crude product. The synthesis method has the advantages of mild reaction condition, few side reactions and simple and convenient operation. And the benzyl benzoyl or fluorinated alkane substituted phenol compound obtained by the application has the effect of resisting colon cancer.