199results about How to "Little change in viscosity" patented technology

The invention discloses a preparation method of lithium ion battery slurry. The preparation method comprises the following steps of 1, preparing a glue solution having a concentration of 3 to 7% by an adhesive, 2, putting one or more active substances and one or more conducting additives into a three-arm planetary stirrer, and uniformly mixing the mixture into powder at a low speed, 3, adding 1 to 15% of a solvent into the powder obtained by the step 2, and uniformly mixing the mixture into wet powder at a low speed, wherein a ratio of the total mass of the solvent to the mass of the powder is in a range of (55: 4) to (50: 50), 4, adding 20 to 50% of the glue solution and the rest of the solvent into the wet powder, and uniformly mixing at a high speed, and 5, adding the rest of the glue solution into the mixture obtained by the step 4, uniformly stirring at a low speed for 5 to 10 minutes, and then stirring at a high speed for 2 to 5 hours to obtain the lithium ion battery slurry. The invention also discloses the lithium ion battery slurry and a battery pole piece prepared by the preparation method, and a lithium ion battery.

The invention relates to a single-component polyurethane sealant capable of quickly curing moisture and a preparation method thereof. The polyurethane sealant comprises the following raw materials in percentage by weight: 10 to 20 percent of polyisocyanate monomer, 20 to 45 percent of polyether polyol, 1 to 10 percent of acetoacetic ester sealed end polyether prepolymer, 5 to 20 percent of plasticizer, 25 to 40 percent of modified mineral powder, 1 to 5 percent of latent curing agent, 0.1 to 2 percent of cyclodextrin wrapped environment-friendly catalyst, 0.1 to 1 percent of defoaming agent and 0.1 to 1 percent of water-removing agent, wherein the water-removing agent is one or more of mono-isocyanate compound or functionalized silane compound. The single-component polyurethane sealant avoids bubble fundamentally, can be quickly cured, is stable in storage, and can be applied to construction on damp interfaces.

The invention relates to acetal wire enamel meeting the heat level of 155 DEG C and above, which has good coating film and conductor adhesion. The heat resistant acetal wire enamel comprises the following components: 280-310 parts of methylphenol, 390-450 parts of dimethylbenzene, 100-160 parts of butanol, 100-125 parts of polyvinyl acetal resins, 57-65 parts of novolac epoxy resins, 28-34 parts of organic silicon resins, 4-7 parts of melamine resins and 0.08-0.15 of leveling agents by mole. The method has the following advantages: 1. in the subsequent wire enamel baking process, the process is easy to control, the molecular weight is uniform and the consistency is good; 2. the peculiar smell generated under normal temperature and during baking is reduced; 3. the product is stable in storage; 4. the coating processability is good and the prepared product has bright, clean and uniform surface; and 5. the heat resistance class of the prepared product is not less than 155 DEG C (F class), the hot stamping temperature thereof is not less than 180 DEG C and the cut-through temperature thereof is not less than 240 DEG C; and the prepared product has excellent medium resistance and excellent adhesion.

The invention relates to a method for preparing low-chromatic number isocyanate containing a carbodiimide and/or uretonimine group capable of being stored in a liquid state and the isocyanate containing the carbodiimide and/or uretonimine group capable of being stored in the liquid state prepared by the method. The method comprises the following steps of: a) reacting an isocyanate group of the raw material isocyanate under the action of a cyclopentene phosphine catalyst to obtain isocyanate reaction liquid partially catalyzed by carbodiimide; and b) adding an anhydride terminating agent into the reaction liquid obtained from the step a) and terminate carbodiimide reaction. The liquid isocyanate prepared by the method has the advantages of low chromatic number and good storage stability.

A high concentration silica slurry can be used for polishing of substrates, such as semiconductor materials. The slurry contains a silica powder dispersed in an solvent. The silica slurry has a silica concentration of more than 50% by weight and a viscosity of less than 1000 mPa·s, wherein the silica powder has a ratio DL/DT of less than 1.3, wherein DL is an average particle size of the silica powder measured by a laser diffraction particle size distribution method and DT is an average primary particle size of the silica powder measured by a TEM photography observation, and wherein the silica powder has an average primary particle size of from 0.08 μm to 0.8 μm.

The present invention discloses a coloring photosensitive resin composition, which comprises substrate resin (A), coloring agent (B), photopolymerization compound (C), initiators for photopolymerization (D) and impregnant (E), wherein the substrate resin (A) comprises a structure unit obtaining from a monomer (A1) which is arranged with carbon-carbon double bonds and aliphatic polycyclic epoxides, and a structure unit obtaining at least from one monomer (A2) of unsaturated carboxylate and unsaturated carboxyl anhydride.

The invention relates to the field of rubber products, and concretely relates to an application of low-ammonia or zero-ammonia latex in a natural latex foamed product. The invention also provides thenatural latex foamed product. The natural latex foamed product is prepared from, by weight, 100 parts of the latex, 2-3 parts of a vulcanizing agent, 0.5-3 parts of a foaming agent, 0.5-1.5 parts of agelling agent, 3-5 parts of an activator, 3-12 parts of an assistant and 20-100 parts of a filler. The natural latex foamed product has the advantages of excellent foam stability, uniform cell size,structured and stable hole structure and few internal defects, and produced sponge products have the advantages of large permanent compression set, low tensile strength, low elongation at break, and significantly improved resilience rate.

The invention provides a preparation method of a paste material of PVC paste resin. The preparation method is technically characterized by comprising the following steps: firstly weighing PVC paste resin, a plasticizer and a stabilizer in parts by weight, sequentially adding into a mortar, and manually dispersing the materials at normal temperature with a brayer for 3-10min, thus finishing the first plastification process; regulating the rotating speed of a vacuum grinder to 50-130rpm, dispersing the materials in the mortar at normal temperature with the brayer, and starting a vacuum pump at the same time for grinding in vacuum for 10min, thus finishing the second plastification process and obtaining a finished product; weighing a certain amount of the finished product paste material, putting into a test cup, putting the test cup into a 30 DEG C thermostatic water bath, standing still at a constant temperature for 1hr, and then testing the viscosity. Through vacuum grinding, the stability of the paste material is improved, and then the disintegration of secondary particles of the PVC paste resin can be accelerated, so that the paste material of PVC paste resin with relatively stable time-dependent behavior can be obtained.

The invention discloses a preparation method and a usage method of a low-viscosity flame-retardant heat-conducting solvent-free polyurethane electronic-pouring sealant. The electronic-pouring sealant comprises a component A and a component B, wherein the component A is prepared by means of the following process: adding 100 parts of castor oil, 5 to 15 parts of flame retardant, 1 to 5 parts of high heat conductive insulation composite powder and 0.05 to 3 parts of an anti-foaming agent into a reaction kettle in parts by mass, performing uniform mixing and vacuum dehydration, then adding 0.05 to 0.3 part of a catalyst, and performing uniform mixing to obtain the component A; and the component B is liquefied diphenylmethylene diisocyanate. In the invention, a high heat conductive insulation composite powder heat conduction technology, a polyurethane in-situ polymerization self-flame-retardant technology and a thermal sensitive catalyst asynchronous catalysis technology are adopted, the product viscosity is smaller than 6000mPa.s, the heat conduction coefficient is greater than 1.85W/MK, the volume resistivity is greater than 4.2*10<12>omega.m, and the flame retardant property can be up to the American FMVSS302 standard.

The invention provides a stone-imitating coating and a preparation method thereof. The stone-imitating coating includes, by weight, 300-500 parts of deionized water, 2-3 parts of a sterilizing agent,2-5 parts of cellulose, 1-2 parts of a dispersant, 2-4 parts of a defoaming agent, 7-10 parts of a film forming additive, 7-10 parts of propylene glycol, 1-3 parts of a pH regulator, 150-200 parts ofa binder, 2-4 parts of a thickener, 300-500 parts of sintered colored sand, and 5-15 parts of protective glue. The sintered colored sand is made from quartz sands in 40-120 meshes, toner percentage being 0.8-1.2%. By using the sintered colored sand instead of calcium carbonate sand, regulating raw material ratio and optimizing process parameters, the coating has excellent performance, good stability and good anti-aging effect. The preparation method has simple process and can achieve industrial large-scale production; the product brings excellent economic benefit to enterprises and has extensive prospect.

A method for applying paper-making process reconstituted tobacco filler comprises the following steps that 1, a reconstituted tobacco coating solution is prepared; 2, calcium carbonate, alumina, talcum powder, bentonite, an assistant guar gum, chitosan, gelatin and vinyl acetate are mixed to be uniform according to a certain proportion; 3, a mixture obtained after the filler and the assistant are mixed is added into the coating solution and dispersed to be uniform; 4, a reconstituted tobacco product substrate is coated with the coating solution, and the finished reconstituted tobacco is obtained through drying and slitting. Starting from paper-making process reconstituted tobacco production, a filler application technical scheme is systematically provided, the prepared reconstituted tobacco product is close to natural tobacco, the viscosity change of the coating solution in the reconstituted tobacco production process is small, the stability of the coating rate is guaranteed, the running stability and the filler utilization rate of a reconstituted tobacco production line are improved, and the production cost is reduced. The method cannot bring negative influences to the sensory quality of the product.

An easily-coating type flexible waterproof slurry and a preparation method thereof are disclosed and belong to the technical field of waterproof coatings. The slurry comprises a composition A and a composition B, and mainly comprises the following compositions: some kinds of a polymer emulsion, an antifoaming agent, a dispersant, quartz powder, quartz sand, ash concrete and polyvinyl alcohol. The composition A comprises 80-90 parts by weight of the polymer emulsion, 1-3 parts by weight of the antifoaming agent, 0.3-0.5 part by weight of the dispersant, 0.1-1 part by weight of an antiseptic, and 1-2 parts by weight of a mildew inhibitor. The composition B comprises 40-60 parts by weight of ash concrete, 30-45 parts by weight of quartz sand, 10-15 parts by weight of quartz powder, 0.02-0.05 part by weight of polyvinyl alcohol, and 0.5-1 part by weight of the water reducer. The easily-coating type flexible waterproof slurry possesses excellent construction performance, settlement resistance, bonding strength, waterproof effect and cracking resistant function.

The invention discloses a high-covering black UV silkscreen printing ink. A preparation method for the high-covering black UV silkscreen printing ink comprises the following steps: preheating acrylate and then mixing the preheated acrylate with a part of active monomer; then adding a dispersant and carrying out primary dispersion; then successively adding pigment and a filling material and carrying out secondary dispersion; carrying out grinding to obtain color paste; mixing a phosphine oxide photoinitiator with residual active monomer; and adding the color paste, an organosilicon antifoaming agent and an organosilicon leveling agent and carrying out uniform dispersion so as to obtain the high-covering black UV silkscreen printing ink. The high-covering black UV silkscreen printing ink provided by the invention is reasonable in composition; all the components are in good compatibility; and the prepared printing ink has excellent comprehensive properties and good storage performance, and the viscosity of the printing ink is suitable for silkscreen printing. The printing ink does not need increase in the usage amounts of components like carbon black, prevents unfavorable influence of the components on the appearance and light shading performance of a product, and can meet light shading requirements of the product after only one printing and under the condition of a thickness of 7 to 8 micrometers, so unexpected technical effects are obtained.

The present invention relates to the use of polyalkylmethacrylate polymers for improving the outgassing properties of functional fluids.

The invention relates to a halogen-free and lead-free solder paste and a preparation method. The preparation method is characterized in that the method comprises the steps of adding diethylene glycol monobutyl ether, castor oil and polyisobutene in a temperature control emulsifying machine and mixing, then adding albolene, polymerized rosin and hydrogenated rosin and mixing again to obtain first mixing solution, reducing the temperature of the first mixing solution, adding succinic acid, sebacic acid and glutaric acid, and mixing again to obtain second mixing solution, reducing the temperature of the second mixing solution, adding polyamide wax and mixing again to obtain third mixing solution, reducing the temperature of the third mixing solution, adding a fluorocarbon surfactant and diethanol amine, then stirring and vacuuming until the temperature is restored to the room temperature, standing for 24h with low temperature, then adding lead-free electronic-grade tin alloyed powder Sn96.5Ag3.0Cu0.5, and stirring to obtain the halogen-free and lead-free solder paste. After being welded, the halogen-free and lead-free solder paste has the advantages and effects of fewer residues, extremely high surface insulation resistance, low corrosion, no needing of cleaning, good thixotropic property and electric conductivity, bright welding points after welding and incapability of collapsing easily.

The invention discloses a carbide high-entropy ceramic precursor containing rare earth. The precursor comprises at least four transition metal elements and at least one rare earth metal element, and the precursor is dissolved in one or more of methanol, ethanol, isopropanol, n-propanol, n-butanol, isobutanol, ethylene glycol monomethyl ether or ethylene glycol ethyl ether. The precursor is prepared by respectively complexing a plurality of transition metal alkoxides, mixing the obtained complex with a compound containing rare earth elements, carrying out co-hydrolysis, and performing reactionwith a carbon source. According to the preparation method of the precursor, the ratio of all the raw materials in the step is finely adjusted, so that all the elements in the precursor are uniformly distributed at a molecular level, all the metal elements are subjected to short-range diffusion in the cracking process, and all the elements can be subjected to solid solution at a relatively low temperature. The preparation of the high-entropy ceramic is different from laser sintering and oxidation reduction in a traditional method, and the high-performance ceramic with a single crystalline phaseand with all elements in a molecular-level uniform distribution state is prepared on the basis of the precursor.

The invention belongs to the field of a lubricant, and relates to the lubricant used for hot extrusion of a titanium alloy and a zirconium alloy as well as a preparation method thereof. The lubricantis composed of lubricant powder and soluble glass, the ratio of soluble glass to the mixed lubricant powder is 1:2-1:3, the lubricant powder comprises the following components: 60-80% of low-softeningpoint glass powder, 10-30% of SiO2 powder, 10-30% of NaCl powder, and the soluble glass with concentration being 1.0-1.1 mol/L. The lubricant has the advantage that the change of viscosity is small with temperature. The lubrication effect and thermal barrier effect are good, and cleaning is easy. The NaCl has water solubility, an extruding product attached with the lubricant is immersed into water, NaCl in the lubricant is dissolved in water, a porous structure is formed, and the lubricant is easily peeled from the surface of the product, and no pickling pollution is generated.

Provided is an electrode mixture paste for a sodium secondary cell containing a positive electrode active material that can be doped and dedoped using sodium ions, an electroconductive material, a binder, an organic solvent, and an acid having a valence of two or above, wherein the temporal change in viscosity is low even in the absence of a special facility.