373 results about "Co solvent" patented technology

The invention provides a method for alcoholysis of polyethylene glycol terephthalate, and relates to the technical field of PET degradation. The PET alcoholysis method provided by the invention comprises the following steps: mixing PET, ethylene glycol, a cosolvent and a composite catalyst, and carrying out alcoholysis reaction to obtain bis (hydroxyethyl) terephthalate (BHET). According to the invention, dimethyl sulfoxide is taken as a cosolvent, zinc acetate and 1, 8-diazabicyclo [5.4. 0] undec-7-ene are taken as a composite catalyst, catalysis and solvent effect driving are combined, and ethylene glycol alcoholysis of PET is carried out under the synergistic effect of the composite catalyst and the cosolvent. According to the method, effective decomposition of PET can be achieved at the low temperature (140-155 DEG C) and within the short reaction time (60-100 min), and the yield of BHET is high (66% or above and can reach 80% or above). The method provided by the invention can realize high-efficiency alcoholysis of PET with ethylene glycol.

The invention discloses a high-temperature-resistant sealing agent and a preparation method thereof, and relates to the technical field of chemical assistants, and the high-temperature-resistant sealing agent is characterized by comprising the following components in parts by weight: 25-32 parts of acidic nano silica sol, 56-65 parts of a cosolvent, 8-12 parts of a hydrolysis inhibitor, 9-12 parts of a silane coupling agent A, 5.5-6.8 parts of a silane coupling agent B and 0.01-0.015 part of a wetting agent. The high-temperature-resistant sealing agent has the effects that the high-temperature-resistant sealing agent is not yellowed, decomposed and dropped after being baked for 2 hours in an oven at the temperature of 250 DEG C, and is not corroded after being corroded by salt mist for 1000 hours.

The present invention relates to the field of plastic films, and in particular to an agricultural plastic film and a preparation method thereof. The agricultural plastic film is composed of the following components in parts by mass: 95-105 parts of film particles, 2-4 parts of modified nano-titanium dioxide emulsion, 6-10 parts of lignin nanoparticles, 2-4 parts of tannic acid, 6-10 parts of glycerol, 4-6 parts of maleic anhydride-grafted polycaprolactone as a co-solvent, and 4-6 parts of cellulose nanocrystals. Compared with the prior art, the present invention achieves comprehensive improvement in material degradability, anti-aging performance and processing efficiency, while taking into account production cost optimization and process adaptability. The agricultural plastic film can be widely used in agricultural scenarios such as greenhouse covering and soil moisture retention, has significant advantages in reducing environmental pollution and improving the comprehensive performance of agricultural films, and has broad application prospects.

The embodiment of the invention provides a paint remover and a preparation method thereof. The paint remover comprises the following raw materials: an alcohol solvent, an ester solvent, an activator, a cosolvent, a corrosion inhibitor, a surfactant, a cosurfactant and deionized water. The paint remover is environment-friendly, does not need special temperature conditions in the preparation and use processes, and has high efficiency, stability, safety and universality.

The invention discloses a neutral organic chelating cleaning agent for a boiler, and belongs to the field of chemical cleaning of boiler superheaters of thermal power plants. The cleaning agent is prepared from the following components in percentage by weight: 0.5%-5% of ethylenediamine tetraacetic acid ammonium, 0.1%-4% of acetic acid or ammonium acetate, 0.1%-3% of glycollic acid ammonium or glycollic acid, 0.1%-5% of a pH regulator, 0.1%-1% of a cosolvent, 0.2%-0.8% of a corrosion inhibitor SH369, 0.1%-0.6% of a reducing agent, 0.0%-0.3% of a defoaming agent, 0.0%-0.2% of a surfactant and 84%-93% of water, wherein the pH value of the cleaning agent is 6-8; the cosolvent is tartaric acid and / or hydroxybutyl diacid, the surfactant is nonylphenol polyoxyethylene ether, and the reducing agent is hydrazine. The cleaning agent disclosed by the invention has good dissolving capacity on oxide skin, does not generate precipitates to cause pipe blockage, is a neutral solution, is very small in corrosivity, does not generate intergranular corrosion, is beneficial to protecting various pipes of superheaters and reheaters, and is a safe and efficient superheater cleaning agent.

The invention discloses a cationic polymer acid-resistant thickening agent as well as a preparation method and application thereof, and belongs to the technical field of oil-gas field development. The polymer thickening agent is prepared from the following components in percentage by mass: 65 to 85 weight percent of acrylamide, 15 to 35 weight percent of methacryloyloxyethyl trimethyl ammonium chloride, 0.01 to 0.05 weight percent of dicationic functional monomer and 1 to 8 weight percent of cosolvent, the acid liquor system comprises the following components in percentage by mass: 5wt%-30wt% of solid acid, 0.01 wt%-0.6 wt% of a cationic polymer acid-resistant thickener, 0.5 wt%-5.0 wt% of a corrosion inhibitor, 0.3 wt%-1.0 wt% of an iron ion stabilizer and the balance of water; wherein the solid acid consists of 5wt%-15wt% of a solid metal catalyst and 85wt%-95wt% of solid particle acid; the acid liquid system has excellent slow release performance, is simple in formula, convenient to transport, low in cost and suitable for site construction, and has wide market prospects.

The invention belongs to the technical field of oilfield chemistry, and particularly provides an environment-friendly oil-phase-free clean nano-microsphere and a preparation method of the environment-friendly oil-phase-free clean nano-microsphere. The nano microsphere is prepared from the following raw materials: 60 to 90 parts of an oil-free phase solvent, 50 to 70 parts of acrylamide, 25 to 35 parts of an anionic unsaturated monomer, 9 to 15 parts of a functional monomer, 3 to 7 parts of a cosolvent, 1 to 2 parts of modified nano silicon dioxide, 0.2 to 0.4 part of an initiator, 0.005 to 0.02 part of a cross-linking agent and 300 to 400 parts of distilled water. The nano-microsphere disclosed by the invention is good in expansion performance, excellent in high temperature resistance and salt resistance, excellent in deep profile control and displacement capacity, free of an oil-phase solvent, environment-friendly and pollution-free, and important support is provided for green transformation of oilfield exploitation.

The invention relates to the technical field of stoving varnish materials, and particularly discloses a scratch-resistant alkali-resistant stoving varnish material and a preparation method thereof, the scratch-resistant alkali-resistant stoving varnish material comprises the following raw materials by weight: 35-40 parts of aqueous acrylic resin, 15-20 parts of amino resin, 7-11 parts of a filler aid, 5-8 parts of a scratch-resistant alkali-based functional agent, 3-5 parts of a silane coupling agent KH560, 2-5 parts of a film-forming cosolvent, 2-5 parts of an adhesion promoter, 1-3 parts of a leveling agent, and 20-25 parts of deionized water. According to the scratch-resistant alkali-resistant baking varnish material, the waterborne acrylic resin, the amino resin, the silane coupling agent KH560, the film-forming cosolvent, the adhesion promoter and the flatting agent are used as functional additives, and meanwhile, the functional agent based on the scratch-resistant alkali and the filler additive are added to be blended and matched to achieve common synergism, so that the hardness and the adhesion of the obtained product are harmoniously improved, and the scratch-resistant alkali-resistant baking varnish material has the advantages of simple preparation process and low cost. The alkali-resistant and scratch-resistant stability effects are obvious.

The invention relates to a method for detecting residual solvent benzene in a ziprasidone hydrochloride bulk drug. According to the detection method, dimethyl sulfoxide is used as a diluent, a 2.8 mol / L potassium hydroxide solution is used as a cosolvent, and a dimethyl sulfoxide solution of high-concentration ziprasidone hydrochloride can be completely dissolved under a high-temperature heating condition, so that the sensitivity of benzene meets the requirement; and detecting the benzene in the ziprasidone hydrochloride bulk drug by using a gas chromatograph (GC-FID headspace sampling) connected with a hydrogen flame ionization detector. The detection method can be used for quantitatively detecting benzene higher than 0.4 ppm in ziprasidone hydrochloride bulk drugs. The method is high in sensitivity and practicability, and the detection process is simple and rapid.

The invention provides a preparation method of dicapryl carbonate, belongs to the field of preparation of dicapryl carbonate, and can solve the problems of unstable reaction system, low raw material conversion rate, low catalyst efficiency, poor phase contact effect, many side reactions, low product purity and poor quality in the existing preparation method of dicapryl carbonate. The preparation method of dicapryl carbonate comprises the following steps: fully mixing n-caprylic alcohol, a basic catalyst and a cosolvent, continuously dropwise adding low-grade dialkyl carbonate into the mixed solution for 5-10 hours through a liquid material distributor, carrying out ester exchange reaction, continuously extracting low-boiling-point substances, controlling the reflux quantity, and carrying out reduced pressure distillation to obtain the dicapryl carbonate. The method comprises the following steps: adding a cosolvent into a reaction solution, enabling the cosolvent with an initial addition amount to always exist in the reaction solution, after the reaction is finished, dealcoholizing by reduced pressure distillation, and removing impurities by washing to obtain a crude product of dioctyl carbonate, and rectifying to obtain a dioctyl carbonate product. The preparation method is high in raw material conversion rate and high in product yield, and the purity of the obtained product is gt; the content of impurities is low, and the method can be applied to preparation of cosmetics.

The invention discloses a method for detecting the content of carbon black in master batch, which comprises the following steps: S1) weighing the master batch with the mass G into a reaction tube, adding methanol, a cosolvent and a catalyst, sealing, and heating for alcoholysis; s2) taking out the reaction tube, cooling to room temperature, opening a cover, pouring a solution in the reaction tube into filter paper with the mass of W0, flushing the reaction tube with ethanol, pouring the solution into the filter paper to completely transfer the solution, flushing filter residues with hot absolute ethanol, and drying the filter paper with the filter residues, wherein the mass of the dried filter paper and the filter residues is W1; s3) putting the dried filter paper with the filter residues into a crucible with the mass of W2, ashing, transferring the crucible into a muffle furnace, calcining, and weighing the mass of the crucible and the ash content as W3 after the weight is constant; and S4) calculating the carbon black content in the master batch according to the following formula: omega = (W1-W0) / G * 100%-(W3-W2) / G * 100%. According to the method, ash content in the detection result is removed, the accuracy is high, the test repeatability is good, the operation is simple, and the energy consumption in the detection process is low.

One example of a jettable antioxidant formulation is used for three-dimensional (3D) printing. The jettable antioxidant formulation includes an antioxidant blend; a surfactant, a dispersant, or a combination thereof; a water-soluble or water-miscible organic co-solvent; and water. The antioxidant blend consists of a primary antioxidant and a secondary antioxidant.

The invention provides a water-borne epoxy resin composite coating and a preparation method thereof, and the water-borne epoxy resin composite coating comprises the following components in parts by mass: 70-90 parts of a water-borne epoxy emulsion component A; 10-30 parts of a curing agent component B; wherein the component A of the waterborne epoxy emulsion is prepared from the following raw materials in parts by mass: 50 to 70 parts of self-emulsifying epoxy resin, 5 to 10 parts of hydrophilic modifier, 15 to 25 parts of pigment filler, 2 to 5 parts of dispersion stabilizer, 1 to 3 parts of cosolvent and 5 to 10 parts of deionized water. Self-emulsifying modification of resin molecules is realized by adopting nonionic polyether grafted self-emulsifying epoxy resin and matching with a hydrophilic modifier with a specific hydroxyl value, an emulsifier does not need to be added, and the viscosity of a coating system is reduced from the molecular level, so that the solid content of the component A of the waterborne epoxy emulsion is more than or equal to 70%, the viscosity is less than 200mPa. S, and the technical bottlenecks of high solid content and low viscosity are broken through; and the requirement for single-time thick coating construction is met, the construction efficiency is greatly improved, and construction period prolonging and cost increasing caused by multiple times of construction are avoided.

The invention relates to the technical field of protein modified fibers, and particularly discloses a functional protein composite cellulose fiber as well as a preparation method and application thereof. The invention relates to a preparation method of a functional protein composite cellulose fiber. The preparation method comprises the following steps: 1) uniformly mixing components including nano silicon dioxide coated zinc oxide particles and deionized water to prepare a ZnO / SiO2 mother solution; 2) uniformly mixing components including a cellulose raw material and a solvent to prepare a cellulose spinning solution; the solvent is composed of quaternary ammonium base and a cosolvent; 3, the ZnO / SiO2 mother solution and the cellulose spinning solution are taken and mixed, the mixture is injected into a coagulating bath to be coagulated and formed, and the functional protein composite cellulose fiber is obtained.The prepared functional protein composite cellulose fiber has the advantages of being low in ZnO / SiO2 wastage rate and good in compatibility and has the lasting deodorization, antibacterial and bacteriostatic functions.

A method of mitigation of persistent organic compounds absorbed on a sorbent, the method including extracting the persistent organic compounds from the sorbent with a supercritical carbon dioxide (scCO2) mixture comprising scCO2, a co-solvent, and an ion source, wherein a scCO2 to co-solvent ratio is between about 10,000:1 to 1:1, wherein a co-solvent to ion source ratio is between about 10:1 and about 1,000,000:1, and wherein the scCO2 mixture is at a pressure and a temperature, to provide an extractant containing the persistent organic compounds; and isolating the persistent organic compounds from the extractant for their reuse or end of life treatment. A composition for the mitigation of persistent organic compounds, the composition including a scCO2, an ion source, and a co-solvent, wherein a scCO2 to co-solvent ratio is between about 10,000:1 to 1:1, and wherein a co-solvent to ion source ratio is between about 10:1 and about 1,000,000:1.

This invention relates to compositions and methods for cleaning and peeling. This disclosure provides a composition for cleaning or peeling materials from a substrate. The composition includes a primary solvent and a co-solvent. The co-solvent includes one or more caprolactam-derived solvents.

A three-dimensional printing kit includes a substantially colorless fusing agent and a color assist agent. The fusing agent includes a liquid vehicle including water, a co-solvent, and an amino acid stabilizer. The fusing agent further includes an infrared (IR) absorbing pigment dispersion including an IR absorbing pigment present in an amount ranging from about 0.01 wt % active to about 1.6 wt % active, based on a total weight of the fusing agent. The color assist agent includes a liquid vehicle including water and a plasticizing co-solvent, and a dye dissolved in the liquid vehicle. Also disclosed is a method of making a colored 3D printed object.

The invention discloses a preparation method and application of a high-flux, high-interception and structure-controllable asymmetric ultrafiltration membrane, and belongs to the technical field of ultrafiltration membranes. The preparation method of the asymmetric ultrafiltration membrane comprises the following steps: mixing 20-30 parts by weight of an ethylene-vinyl acetate copolymer, 40-70 parts by weight of a good solvent, 4-20 parts by weight of a pore-foaming agent, 10-25 parts by weight of a cosolvent and 0-10 parts by weight of a plasticizer, heating and stirring, standing and defoaming to obtain a homogeneous membrane casting solution; coating a substrate with the membrane casting solution and then carrying out pre-evaporation treatment; and immersing the pre-evaporated material into a coagulating bath to carry out phase separation and solvent exchange for curing, and washing to obtain the ultrafiltration membrane. Effective preparation of the asymmetric ultrafiltration membrane with high flux, high interception and controllable structure is realized, and the preparation method is simple to operate, clear in process, high in practicability and beneficial to product industrialization.

The present invention relates to the technical field of battery component processing, and provides a Dyn hold cleaner for battery covers and a cleaning method. The cleaner is composed of components in the following mass percentages: 40% - 65% of a hydrocarbon solvent, 3% - 15% of an organic base, and 20% - 50% of a co-solvent. The hydrocarbon solvent is one of synthetic isoparaffins, dearomatized fluids, Fischer-Tropsch synthetic paraffins, isoparaffins, or refined C11. The organic base is one or more of monoethanolamine, triethanolamine, isopropanolamine, diethylene glycolamine, and 2-amino-2-methyl-1-propanol. The present invention can effectively remove various dirt such as stamping oil residues on the surface of the battery cover. After cleaning, there is no white spot residue on the cover surface, the cleaner does not corrode the workpiece, and there is no adverse effect on the appearance of the workpiece; the initial Dyn value after cleaning is greater than 54 mN / m, and the Dyn value remains undiminished after 15 days of storage. Fundamentally, the problem of Dyn attenuation on the surface of the workpiece during storage and turnover is solved.

The invention belongs to the technical field of ultra-low volume liquid, and particularly relates to ultra-low volume liquid for preventing and treating spodoptera frugiperda. The ultra-low volume liquid for preventing and treating the spodoptera frugiperda is prepared from the following components in percentage by mass: 8 to 20 percent of an active component, 0.5 to 1.5 percent of a synergist, 5 to 8 percent of a cosolvent, 3 to 5 percent of a penetrating agent, 2 to 3 percent of a dispersing agent, 0.5 to 1 percent of an antioxidant, 0.3 to 0.5 percent of an anti-drifting agent and the balance of a solvent, wherein the active ingredient is prepared by compounding abamectin and lufenuron. The synergist of the ultra-low volume liquid can enhance the toxicity effect of the compound combination, and is beneficial to further improving the control effect on target pests. In addition, compared with a single penetrant, the penetrant of the ultra-low volume liquid can improve the wetting, spreading and infiltration capacities of the agent, so that the utilization rate of effective components of pesticides is improved, the pesticide dosage is reduced, and the environmental pollution and the prevention and treatment cost are reduced.

The application provides an absorption liquid for absorbing asphalt fume and oil mist waste gas, a preparation method and application, and relates to the field of waste gas treatment. The absorption liquid is prepared from the following raw materials in mass percentage: polyethylene glycol dimethyl ether 60-80%; demulsifier 5-15%; dispersion polymerization inhibitor 3-10%; oxidant carrier 1-3%; slow-release particles 2-9%; cosolvent 5-12%; and defoaming agent 0.1-1%. In the application, the anti-adhesion and polymerization resistance performance are improved through the compounding of various solvents, the continuous operation cycle of the equipment is prolonged to more than 90 days, the pressure difference of the filler is increased by less than 5%, and the frequent shutdown problem caused by asphalt fouling in the traditional technology is completely solved; meanwhile, the demulsification is efficient, the removal rate is high, and another possibility is provided for efficient, green and economic deep treatment of waste gas.

The application discloses an intermediate processing liquid for an electroless nickel immersion gold (ENIG) production line and a chemical gold preparation method. The intermediate processing liquid is applied between the electroless nickel plating and immersion gold processes, and comprises (a) a pH buffer and a metal ion complexing agent: a total concentration of 50-150 g / L; (b) an adsorptive corrosion inhibitor: a concentration of 0.5-5.0 g / L; (c) a low-foam non-ionic surfactant: a concentration of 0.01-10 g / L; (d) an auxiliary antioxidant: a concentration of 0.5-30 g / L; (e) a dissolving agent: a concentration of 1-50 ml / L; (f) a pH regulator: an appropriate amount, which is added to maintain the pH value of the intermediate processing liquid at 4.0-6.5; and (g) deionized water: a balance, so that the concentrations of the above components reach the set target values; and the intermediate processing liquid has a design use temperature of 20-45 DEG C. The intermediate processing liquid removes residual nickel ions on the board surface and in micropores through strong complex cleaning, and blocks the pollution to the subsequent gold tank; meanwhile, the preferential adsorption of the corrosion inhibitor molecules at the nickel layer grain boundaries forms a controllable molecular-level protective film, effectively adjusts the immersion gold replacement reaction kinetics, and prevents the occurrence of intergranular corrosion (black plate).

A complex consisting of lipoic acid or a salt thereof, a chelating agent such as a salt of ethylene diamine tetraacetic acid (EDTA) or analogous compounds and an ester of ascorbic acid with long-chain fatty acids, in particular ascorbyl palmitate inhibits the pigmentation of teeth induced by chlorhexidine and salts thereof. In addition to the depigmenting complex, the formulations of the invention, in the form of gels, mouthwashes, toothpastes or periodontal sprays, may contain other ingredients such as hyaluronic acid or hyaluronates, glycerophosphocholine, sweeteners, flavourings, buffering agents, viscosifying agents, mucoadhesive and filming agents, solvents, co-solvents, surfactants.

This invention discloses a method for preparing dihydroquercetin oil-soluble microcapsules based on a microfluidic chip, along with its applications. The preparation method involves: uniformly dissolving dihydroquercetin and a co-solvent under heating conditions to obtain a dispersed phase; uniformly dissolving a surfactant and oil under heating conditions, followed by adding lactobacillus fermentation lysate to obtain a mixture; subjecting the mixture to high-pressure homogenization to obtain a continuous phase; using a microfluidic chip, pumping the dispersed and continuous phases into corresponding channels of the chip via a syringe pump; at the chip's intersection, shearing, compressing, and encapsulating the dispersed phase in the continuous phase to form monodisperse dihydroquercetin oil-soluble microcapsules. The method employed in this invention utilizes the precise fluid control capabilities of a microfluidic chip to achieve uniform and controllable microcapsule particle size and structure, ensuring continuous and repeatable processing with high encapsulation efficiency, and effectively improving the solubility and stability of dihydroquercetin.

The application provides a soluble liquid agent containing flonicamid and acetamiprid, and a preparation method and application thereof. The soluble liquid agent is composed of flonicamid, acetamiprid, a solvent, a cosolvent, a surfactant, a pH regulator, a penetration enhancer and ethanol. The application reduces ecological toxicity by selecting suitable auxiliaries, has the advantages of small drift, slow evaporation, strong adhesion, good spreading, wetting and adhesion effects on targets, long retention time, rainwater erosion resistance, and improved pesticide penetration, so that the pesticide can act faster. In addition, the soluble liquid agent prepared by the application can meet the requirements of pest control under different water qualities and meet the requirements of field application under complex climate conditions. The soluble liquid agent of the application is an agricultural insecticide with good insecticidal effect, simple production process and no environmental pollution.

The invention relates to a high-elongation aluminum-plastic composite material and a preparation method thereof. The high-elongation aluminum-plastic composite material comprises an aluminum foil, a bonding layer, a coating and a film which are arranged layer by layer from outside to inside, the bonding layer is prepared from composite glue, and the composite glue comprises the following components in percentage by weight: 30-50% of polyurethane resin, 1-5% of an organic silicon coupling agent, 0.5-1% of a leveling aid and the balance of a mixed solvent; the coating is prepared from a primer, and the primer comprises the following components in parts by weight: 50-90 parts of polythiol; 10 to 50 parts of linear saturated polyester resin; 1 to 10 parts of water; the invention has the advantages that the primer is used as a coating, the primer and the surface of a base material form a stable chemical bond, and the coating uniformly covers the interface of a thin film and an aluminum foil due to the film-forming characteristic of the primer, so that a compact transition layer is formed, and the integrity of the thin film and the aluminum foil can be improved; and by enhancing the flexibility and elasticity of the material, the shielding layer is prevented from being easily damaged to cause the reduction of the shielding performance.

An inkjet ink that includes (A) a terpene phenol resin, (B) a solvent system containing (B1) ethanol and (B2) a cosolvent, and (C) an amine modified silicone that includes a silicone backbone (main chain) and one or more organoamine side chains attached to the silicone backbone, the inkjet ink being characterized by extended decap times and superior adhesion to a variety of substrates, A printed article including the inkjet ink in dried form, and a method of forming a printed image with a thermal inkjet printhead are also provided.

Described herein are methods of fabricating a nanoporous polymer membranes. These methods can comprise forming a film of a casting solution comprising a gas permeable polymer, a solvent, a co-solvent, and a porogen; contacting the film with humid air to induce phase separation in the film; and contacting the film with an aqueous solution to induce phase separation in the film.

The invention relates to the technical field of oral care compositions, in particular to an oral care composition and a preparation method and application thereof.The oral care composition comprises a first composition and a second composition, the first composition comprises an anti-sensitive agent, a cosolvent, a first thickening agent, a surfactant and a first auxiliary, and the second composition comprises an anti-sensitive agent, a cosolvent, a second thickening agent, a surfactant and a second auxiliary; the first composition comprises phthalimide peroxyhexanoic acid, a cosolvent, a first thickening agent, a first auxiliary agent and deionized water, the second composition comprises phthalimide peroxyhexanoic acid, a cosolvent, a second thickening agent, a second auxiliary agent and deionized water, at least one of the cosolvent, the first auxiliary agent and the second auxiliary agent contains a flavoring agent, and the first composition and the second composition are separately stored before use. The anti-sensitive agent is prevented from being in contact with the phthalimide peroxyhexanoic acid before use. According to the invention, the first composition and the second composition are respectively and independently stored, so that natural decomposition and activity attenuation of phthalimide peroxycaproic acid in the shelf life of the product are inhibited, and the product is ensured to retain high effective active oxygen content after being stored for a long time.