25results about How to "Good viscosity stability" patented technology

The invention belongs to the technical field of tunnel engineering, and particularly relates to shield tunneling machine anti-drag slurry for stacked tunnel construction and a use method of the shield tunneling machine anti-drag slurry. According to the anti-drag slurry, bentonite, anhydrous Na2CO3 and water are used as main raw materials, a certain amount of a lubricant and a nanometer material are added into the slurry to prepare the anti-drag slurry, the stress condition between a shield tunneling machine shell and a soil body is monitored in real time, the grouting amount and the grouting pressure of the anti-drag slurry are dynamically adjusted according to the change of soil pressure, and therefore the anti-drag effect of the shield tunneling machine is achieved. The friction force between the shield tunneling machine shell and the surrounding soil body can be reduced, disturbance of the shield tunneling machine shell to the soil body is reduced, consolidation settlement of the soil body in the later period is reduced, and materials and methods are provided for stacked tunnel construction.

The invention discloses a high-temperature-resistant adhesive tape and a preparation method thereof, and belongs to the technical field of adhesive tape preparation. The adhesive tape is composed of a composite adhesive and a composite polyester film, and the composite adhesive is composed of hydroxyl polydimethylsiloxane, boric acid, 2, 2-bis [4-(4-aminophenoxy) phenyl] propane and 4, 4-bis (4-aminophenoxy) phenyl] propane. The composite polyester film is prepared from polyethylene glycol terephthalate, 1-allylimidazole, 2-bromobutane, potassium hexafluorophosphate, methacryloyloxyethyl trimethyl ammonium chloride and nano silicon dioxide, and the composite polyester film is prepared from polyethylene glycol terephthalate, 1-allylimidazole, 2-bromobutane, potassium hexafluorophosphate, methacryloyloxyethyl trimethyl ammonium chloride and nano silicon dioxide. The adhesive tape prepared by the method has excellent viscosity, high temperature resistance, aging resistance and antistatic property.

The invention discloses green low-carbon high-rutting-resistance asphalt concrete and a preparation method thereof, and relates to the technical field of asphalt concrete. The technical scheme is as follows: RAP accounts for 30-40% of the mass of a new aggregate, 53-65 parts of the new aggregate, 3.2-4.1 parts of new asphalt, 4-6 parts of mineral powder, 0.3-0.4 part of high-density oxidized polyolefin, 0.05-0.1 part of a drying agent, 0.05-0.1 part of a lead salt stabilizer, 0.05-0.1 part of an auxiliary agent, 1.5-3 parts of reactive polyurethane, 3-6 parts of a polyester modifier, 0.5-2 parts of a silane coupling agent, 0.1-0.5 part of an antioxidant and 0.5-2 parts of a dispersing agent. Through the synergistic effect of high-density oxidized polyolefin and reactive polyurethane, the performance of aged asphalt in RAP is improved, the rutting resistance of asphalt concrete is improved, VOC emission is reduced, the sustainability of the material is enhanced, the long-term durability is improved, and the service life of a road is prolonged.

The invention discloses a bio-based polyamide nanofiltration membrane and application thereof, and belongs to the technical field of synthesis of bio-based polyamide nanofiltration membranes and purification of 5-hydroxymethylfurfural and 2, 5-furandicarboxylic acid. According to the invention, 2, 5-dimethyl furandicarboxylate and hexamethylenediamine are used as raw materials, polydimethyl furandicarboxylate hexamethylenediamine prepared by an amine ester exchange method is used as a film-forming polymer, and a solution phase inversion method is further adopted to prepare the bio-based polyamide nanofiltration membrane polydimethyl furandicarboxylate hexamethylenediamine membrane. The method has the advantages that 5-hydroxymethylfurfural and soluble humin can be selectively separated by the aid of the method, impurities in 2, 5-furandicarboxylic acid sodium salt aqueous solution can be separated, and accordingly the high-purity 5-hydroxymethylfurfural and 2, 5-furandicarboxylic acid can be prepared.

The present invention relates to the field of fracturing fluid, and in particular to an emulsion-modified fracturing fluid for oil well protection and a preparation method thereof, which is used to solve the problem that although a conventional fracturing fluid can increase oil well production, it is easily ineffective in a high-temperature and high-pressure oil well environment, which not only affects the fracturing effect, but may also cause damage to the oil well, resulting in a poor oil well protection effect; the fracturing fluid has high temperature resistance and salt resistance, so that it can work stably in a high-temperature oil well, and has excellent viscosity, can effectively carry sand during the fracturing process, form stable cracks, is conducive to the effective exploitation of oil and gas resources, can maximize its advantages in oil well protection and production increase, and its preparation method is simple, the cost is low, it is easy to industrialize production, and has broad application prospects.

The invention discloses a positive pole homogenizing process, a positive pole slurry and a battery, the positive pole homogenizing process comprises the following steps: infiltrating an active substance and a dispersant in a solvent for dispersion to obtain a first slurry; wherein the solid content of the active substance in the first slurry is # imgabs0 #, a conductive agent is added into the first slurry for dispersion, and second slurry is obtained; adding the dissolved binder into the second slurry, and kneading and dispersing to obtain third slurry; and carrying out post-treatment on the third slurry to obtain the positive electrode slurry. The slurry prepared by the invention is silky, good in fluidity, free of agglomerated particles, relatively good in viscosity stability, free of baking crack during coating, and free of powder falling and demolding of coating paired rollers.

This invention relates to the field of carbon nanotube technology, specifically disclosing a high-viscosity carbon nanotube conductive paste and its preparation method. The raw materials for this high-viscosity carbon nanotube conductive paste include ultra-long single-walled carbon nanotubes, short-cut multi-walled carbon nanotubes, conductive carbon black, carboxyl-terminated hyperbranched polyester-polyethylene glycol block copolymer, polyacrylic acid, fluorinated silane coupling agent, γ-butyrolactone, and N-methylpyrrolidone. The high-viscosity carbon nanotube conductive paste provided by this invention achieves uniform dispersion, low volume resistivity, excellent anti-settling properties, and good coating processability of the carbon nanotube conductive paste under high solids content through the synergistic effect of the carboxyl-terminated hyperbranched polyester-polyethylene glycol block copolymer, the fluorinated silane coupling agent, and polyacrylic acid, combined with multi-stage grinding and high-pressure homogenization processes.

This invention relates to a dispersant, its preparation method, and its application. The dispersant provided by this invention is based on acetylacetonate diol, which undergoes hydrogenation, ethoxylation, polyesterification, and phosphorylation to form an innovative twin-type dispersant. By adjusting the length of the polyether and polyester in the dispersant, this invention can effectively improve the compatibility between various components in coatings or battery slurries, thereby reducing viscosity and improving slurry stability. Specifically, for battery slurries, the dispersant prepared by this invention can prevent the agglomeration of positive and negative electrode active materials and conductive agents in the slurry through steric hindrance, thus improving the fluidity of the battery slurry, improving the slurry gelation, and enhancing viscosity stability. Therefore, it can achieve a lower viscosity at a higher solids content.

The present invention belongs to the technical field of oilfield chemistry, and specifically relates to a high-temperature tackifying multifunctional additive for oil well cement, and a preparation method and application thereof. The high-temperature tackifying multifunctional additive for oil well cement of the present invention is formed by copolymerization of the following monomers: 2-10 parts by weight of anionic monomer, 0.5-5 parts by weight of rigid monomer, 0.2-3.8 parts by weight of carboxylic acid monomer, 0.5-4.5 parts by weight of cationic monomer, 0.5-10 parts by weight of ether monomer, and 0.2-5.5 parts by weight of cross-linking monomer. The high-temperature tackifying multifunctional additive for oil well cement of the present invention has low viscosity, good fluidity, good compatibility, multiple functions, is beneficial to offshore cementing construction operations, and improves operating efficiency.

The invention relates to the field of refining and application of wood fiber biomass, and discloses a lignin-based formaldehyde-free adhesive, a lignin-based plywood and a preparation method and application of the lignin-based formaldehyde-free adhesive and the lignin-based plywood. The lignin-based formaldehyde-free adhesive disclosed by the invention comprises the following components: L-cysteine lignin, and the solid content of the lignin-based formaldehyde-free adhesive is 10-45wt%. The method comprises the following steps: mixing an aqueous solution of L-cysteine hydrochloride and lactic acid with raw materials for pretreatment; performing extraction and vacuum filtration on the obtained suspension to obtain dissolved lignin and hemicellulose filtrate, and performing extraction and purification on the filtrate to obtain L-cysteine lignin; the lignin-based formaldehyde-free adhesive is prepared by uniformly dispersing the L-cysteine lignin in water. According to the invention, the used solvent is green and nontoxic in source, the hydrated lignin-based adhesive with good fluidity is prepared with low solid content, and the prepared plywood shows excellent dry and wet bonding strength, solvent resistance and weather resistance, and meets the preparation requirements of national I-class plywood.

The invention discloses a polymer phase-change material and a preparation method thereof.The method for preparing the polymer phase-change material comprises the following steps that any two of a monomer A, a monomer B and a monomer C are mixed, under nitrogen protection, stirring is conducted, the temperature is raised to the initiating temperature of an initiator, then the initiator is added, and a mixture is obtained; adding one or more of a chain transfer agent, a heat stabilizer or an ultraviolet light absorber at the same time, and stirring for reaction; the monomer A is acrylic acid n-alkyl ester, the monomer B is maleic acid di-n-alkyl ester, and the monomer C is alpha-olefin. The method is free of reagents, simple in process, easy to control, high in production efficiency, wide in application range, low in cost and convenient for practical application, and the polymer phase change material prepared by adopting the method is excellent in thermal stability, relatively high in melt viscosity and relatively high in enthalpy.

The invention provides a water-based ink emulsion and a preparation method and application thereof, the water-based ink emulsion is obtained by polymerizing a raw material system comprising a monomer A, a monomer B, a monomer C, an EO-PO block copolymer and alkali-soluble acrylic resin, and the composition and proportion of the raw material system are limited. The water-based ink prepared from the water-based ink emulsion can be promoted to have the advantages of high viscosity stability, high glossiness and color concentration and good blocking resistance and water resistance.

The present invention discloses a modified glass powder for silver paste on the front side of a solar cell, and a preparation method and application thereof. The modified glass powder for silver paste on the front side of a solar cell comprises glass powder and a Ni-P alloy coating coated on the surface of the glass powder, wherein the Ni-P alloy coating is coated on the surface of the glass powder by chemical plating. The modified glass powder for silver paste on the front side of a solar cell provided by the present invention has excellent stability, and avoids the active groups on the surface of the glass directly contacting with the organic phase, thereby causing the deterioration and decomposition of the organic phase; at the same time, due to the high conductivity and high melting point of the coating, the electronic conductivity of the glass is increased, and the premature flow of the glass powder is suppressed, thereby reducing the degree of damage to the PN junction by the glass, and obtaining a higher open circuit voltage.

The present invention discloses a cleaning composition containing a layered structured surfactant system and its application, and relates to the technical field of cleaning compositions. The present invention uses alkanoyl taurate or / and methyl alkanoyl taurate, and is used in combination with a certain proportion of fatty acids. In a water-based environment, a structured layered structure can be formed under neutral to acidic conditions, and on the basis of using a small amount of surfactant, a higher viscosity can be achieved at high and normal temperatures, with excellent viscosity stability, and no additional addition of structurants such as thickeners or a large amount of surfactants are required to achieve stability requirements at room temperature to high temperatures. The viscosity of the cleaning composition at 0.6s-1 at 25°C is ≥1000mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥0.3, and it is stable at least 2 weeks at 25°C and 50°C, and no visually observable separation occurs.

The invention relates to a method for preparing a viscosity slow-release high-temperature-resistant and salt-resistant oil-displacing polyacrylamide emulsion and dry powder. The method for preparing the polyacrylamide emulsion is to obtain the polyacrylamide emulsion through water-in-oil, i.e., reverse emulsion polymerization, and includes a polymerization process of the reverse emulsion, a polymerization preparation process of a shell layer, and a phase-transfer treatment process of the emulsion after polymerization. The method for preparing polyacrylamide particles is to obtain the acrylamide particles through suspension polymerization, and includes a polymerization process of suspension polymerization, a preparation polymerization of a shell layer, and a separation and drying process of suspended particles. The polyacrylamide emulsion and dry powder prepared by the method can greatly avoid shearing of an ultra-high molecular weight and high-viscosity polymer solution when passing through a blasthole and a near-wellbore area, reduce viscosity loss in the initial injection stage, and simultaneously improve polymer viscosity stability and action time.

The utility model provides equipment for improving the viscosity stability of a glue solution, and belongs to the technical field of glue solution processing. The stirring device comprises a stirring tank, the upper end of the stirring tank is connected with a mounting plate through bolts, and the upper side wall of the mounting plate is fixedly connected with a mounting frame; the design of the movable door ensures that the tank is sealed while the raw materials are added, impurities are prevented from entering the tank, and the purity of a glue solution is kept; along with the change of the rotating speed of the stirring shaft, the movable sleeve moves along the stirring rod through centrifugal force, so that the mixing strength can be adjusted in a self-adaptive manner, glue solutions in different areas are mixed in a targeted manner, and the mixing efficiency and uniformity are improved; the stirring rod can enlarge the mixing area in the stirring process, bubbles can be broken, possible air entrainment is reduced, and therefore the product quality is improved; and the controller can adjust the rotating speed of the stirring shaft, and is matched with the movement of the movable sleeve to adjust the dynamic state of the stirring rod, so that the shearing force of stirring is favorably controlled, and the adverse effect of excessive shearing on the glue solution is avoided.

The present invention discloses a taurine cleaning composition and its application under acidic conditions, and relates to the technical field of cleaning compositions. The present invention uses a small amount of alkanoyl taurate or / and methyl alkanoyl taurate, and a certain proportion of fatty acids are used in combination, and polyols are added. In a water-based environment, a structured layered structure can be formed to achieve a self-thickening effect under slant acidic conditions, and a higher viscosity can be achieved at high and normal temperatures, with excellent viscosity stability, without the need to add additional structuring agents such as thickeners or using a large amount of surfactants, the stability requirements at room temperature to high temperatures can be achieved. The taurine cleaning composition has a viscosity of ≥1000mPa.s at 25°C at 0.6s-1, and a ratio of the viscosity at 50°C to the viscosity at 25°C of ≥0.3, and is stable at least 2 weeks at 25°C and 50°C, and no visually observable separation occurs.

The invention discloses a salt-resistant functional monomer suitable for a high-salt oil field environment, and relates to the technical field of oil field exploitation, and the functional monomer S is a salt-resistant polymer suitable for the high-salt oil field environment and comprises the following components in parts by weight: 210-260 parts of acrylamide; 15 parts to 30 parts of AMPS (2, 2, 4-trimethyl-1 6 to 15 parts of AEO-9 (fatty alcohol polyoxyethylene ether); 20 to 50 parts of a functional monomer S; 10 to 20 parts of urea; 0.2 to 0.3 part of a 1 # initiator; 0.05 to 0.15 part of a 2 # initiator; 0.05 to 0.15 part of a 3 # initiator; 0.1 to 0.3 part of a 4 # initiator; the total amount is 1000 parts. According to the salt-resistant functional monomer suitable for the high-salt oilfield environment, a polymer synthesized by using the functional monomer has the characteristics of high salt resistance, high tackifying property, high viscosity stability and capability of being prepared by using oilfield produced sewage, and can keep good solubility and viscosity under the sewage condition, so that the oil recovery rate is increased.

A method for preparing high-stability conductive paste from hydrogenated nitrile rubber comprises the following steps: (1) pre-treating hydrogenated nitrile rubber to reduce the molecular weight of the hydrogenated nitrile rubber; (2) shearing and crushing the pretreated hydrogenated butadiene-acrylonitrile rubber, and dissolving in a solvent to obtain a hydrogenated butadiene-acrylonitrile rubber dispersed glue solution; and (3) adding a conductive material into the dispersed glue solution prepared in the step (2), fully infiltrating the conductive material through premixing and grinding, and then preparing the conductive slurry by using a high-pressure microjet process. According to the preparation method, the heat resistance, dispersity, stability and processing performance of the high-voltage-resistant conductive paste can be remarkably improved. The viscosity stability of the hydrogenated butyronitrile conductive paste within 6 months and the viscosity change of the hydrogenated butyronitrile conductive paste after homogenization for 24 hours are obviously improved, and the hydrogenated butyronitrile conductive paste has good processability.

The invention provides an acrylic acid electrophoretic coating and a preparation process thereof, the acrylic acid electrophoretic coating comprises main materials and auxiliary materials in corresponding parts by mass, the main materials comprise 5-15 parts by mass of acrylic acid, 10-15 parts by mass of ethylene-vinyl acetate copolymer, 2-5 parts by mass of styrene, 3-8 parts by mass of polydimethylsiloxane, 15-25 parts by mass of butanol, 3-8 parts by mass of benzoyl peroxide and 14-22 parts by mass of ethylene glycol monobutyl ether; the adhesive is prepared from the following components in parts by weight: 8 to 12 parts of hydroxypropyl methacrylate, 12 to 14 parts of methyl methacrylate, 6 to 8 parts of styrene, 14 to 17 parts of tert-butyl methacrylate, 4.5 to 7 parts of low-molecular-weight thioglycol, 3 to 5 parts of benzoyl peroxide and 3.5 to 7 parts of dimethylolpropionic acid. The acrylic acid electrophoretic paint has the advantages that by adding the modified aluminum phosphate and the auxiliary materials into the color paste, the surface tension between the color paste and water can be effectively reduced, the dispersion and stability of pigment and filler systems in the acrylic acid electrophoretic paint are facilitated, and the wetting and permeation of the acrylic acid electrophoretic paint on a base material are facilitated; the wetting, dispersing and stabilizing effects of the acrylic electrophoretic paint are further improved.

The present invention provides quantum dots and their applications. The quantum dots of the present invention have a ligand layer on the surface, and the ligand layer contains one or more of the compounds represented by chemical formulas 1 to 4. The quantum dots of the present invention have excellent oxidation stability and can be effectively applied to quantum dot dispersions, quantum dot light conversion compositions, etc. In chemical formula 1, L is C 1 ‑C 22 alkylene, R is hydrogen or methyl, and n is an integer from 1 to 3; in Chemical Formula 2, R 1 For hydrogen, R 2 is an alkylene group having 1 to 30 carbon atoms; in chemical formula 3, R 3 is hydrogen or methyl, R 4 is a straight chain or branched chain alkylene group having 1 to 30 carbon atoms, and m is an integer of 1 to 100; in Chemical Formula 4, R 5 is hydrogen or methyl, R 6 is a straight-chain alkylene group having 1 to 30 carbon atoms, A is -O-, -NH-, etc., R 7 is an alkyl group having 1 to 10 carbon atoms, and l is an integer of 1 to 250.

The invention discloses a stabilizer for power equipment. The stabilizer comprises the following components in parts by weight: 50-70 parts of poly-alpha-olefin, 40-60 parts of ester base oil, 3-5 parts of an antioxidant, 2-5 parts of a dispersing agent, 2-4 parts of an anti-wear agent, 1-2 parts of a cleaning agent, 1-3 parts of a preservative, 1-3 parts of a foam inhibitor and 3-5 parts of a viscosity index improver, the ester base oil is a composition of dioctanoic acid diester and diisononanoic acid diester, and the weight ratio of the dioctanoic acid diester to the diisononanoic acid diester is 1: (3-5). The power equipment stabilizer prepared by the scheme has excellent performance in a high-temperature oxidation stability test (ASTM D943), a low-temperature starting fluidity test (ASTM D5293) and a pour point test (ASTM D97), and results show that the power equipment stabilizer has certain stability under high-temperature and low-temperature conditions, and meets the use requirements of power equipment. According to the scheme, the ester base oil is a mixture of dioctanoic acid diester and diisononanoic acid diester, so that the performance of the power equipment stabilizer is remarkably improved.

The present invention relates to a polymer stabilizer, a coal anti-freezing solution and a preparation method thereof, and relates to the technical field of anti-freezing solutions, the coal anti-freezing solution comprises the following components by weight: 1%-20% of a polymer stabilizer, 0.1%-5% of a nano cellulose compound, 35%-55% of a urea and sodium salt compound, 0.8%-5% of a pH regulator, and the balance of water. The polymer stabilizer provided by the invention is further applied to the anti-freezing solution for coal, and is matched with the nano-cellulose compound, the urea, the sodium salt compound and other components for use, so that the anti-freezing solution for coal with the freezing point of-50 DEG C to-60 DEG C, the chlorine content of less than or equal to 80mg / kg, the calcium content of less than or equal to 5% and the viscosity and freezing point stability of more than or equal to 30 days is prepared, and the defects in the prior art are overcome.

The invention discloses tungsten slurry with high viscosity stability and a preparation method thereof, and belongs to the technical field of tungsten slurry, the tungsten slurry comprises tungsten powder, the average particle size of the tungsten powder is 0.5-2.0 [mu] m; the composite organic solvent comprises tripropylene glycol monomethyl ether and butyl carbitol, and the composite organic solvent is formed by mixing the tripropylene glycol monomethyl ether and the butyl carbitol; and an additive, wherein the additive comprises dibutyl phthalate and 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate. The tungsten slurry has excellent viscosity stability: a remarkable synergistic effect is generated through a specific solvent combination and an additive combination, for example, when the tungsten slurry is stored for 5 days at normal temperature, the viscosity is only slowly reduced to 1.2 W from 1.5 W, the change amplitude is extremely small, and compared with the prior art, the viscosity is dramatically increased by several times or even dozens of times in the same period, and the viscosity stability is greatly improved. Therefore, the technical problem of poor storage stability of the slurry is solved.

The present invention provides quantum dots and their applications. Specifically, the invention provides quantum dots, a quantum dot dispersion containing the quantum dots, a photoconversion curable composition, a quantum dot light-emitting diode, a quantum dot film, a cured film formed using the photoconversion curable composition, and an image display device containing the cured film. The quantum dots have a ligand layer on the surface, and the ligand layer contains a compound with a specific chemical formula structure. The quantum dots of the present invention have excellent optical properties and reliability, and can therefore be effectively used in a variety of applications such as quantum dot films, quantum dot light-emitting diodes, color filters, photoconversion layered substrates, etc., thereby providing a high-quality image display device.