15results about How to "Good dispersibility" patented technology

The invention relates to chemical technology for producing high-purity magnesium oxide used in the pharmaceutical, cosmetic, and food industries, in the production of ceramics, glasses, optical materials, electronic materials, catalysts, polymer materials, transformer steel. High-purity magnesium oxide having a specific surface area, determined by the BET method, in the range from 5 to 70 m2 / g, an average particle size (d50), determined by laser diffraction, of not more than 5 µm, characterized in that it has a mass fraction of impurity elements of each of Pb, Cd, As, Hg of not more than 0.1 ppm, a mass fraction of impurity elements of each of Ba, Zn, Ti, Mn, Co, Mo, V, Sb, Sr of not more than 1 ppm, a mass fraction of impurity elements of each of Al, F of not more than 5 ppm, a mass fraction of impurity elements of each of P, Cr, Ni, K, Li of not more than 10 ppm, a mass fraction of Fe of not more than 50 ppm, a mass fraction of Si of not more than 0.01%, a mass fraction of impurity elements of each of Ca, B of not more than 0.02%, a mass fraction of sulphates SO42- of not more than 0.02%, a mass fraction of Na impurity of not more than 0.05%, a mass fraction of chloride impurity of not more than 0.05% and includes primary particles and agglomerates consisting of primary particles. High-purity magnesium oxide is obtained by calcination of magnesium hydroxide obtained by reacting a purified concentrated aqueous solution of magnesium chloride with an aqueous solution of sodium hydroxide in a continuous manner at a temperature of 40-90 °C, stirring at a speed of 20-300 rpm at a molar ratio of OH-:Mg++ ions within the range (1.9÷2.1):1 with the continuous supply of a suspension of magnesium hydroxide seed crystals into the reaction mass in an amount of 5-200% of the total mass of the supplied initial reagents, and the magnesium hydroxide seed crystals are pre-treated with a concentrated aqueous solution of magnesium chloride, after interaction of the reagents, a suspension of magnesium hydroxide is sent for aging at a temperature of 40-90 °C, then hydrothermal crystallization of magnesium hydroxide particles is carried out in the presence of dihydric alcohol: ethylene glycol or propylene glycol, at a temperature in the range from 120 to 220 ° C, pressure in the range from 0.1 to 2.3 MPa, and a duration ranging from 1 to 10 hours, the resulting suspension of magnesium hydroxide is filtered, washed, and calcination of magnesium hydroxide is carried out at a temperature of 700-1100 °C. The obtained high-purity magnesium oxide has high chemical purity, adjustable specific surface area, pore volume and pore size distribution, particle size distribution and activity.

This invention discloses a portable UV and hydrogen peroxide co-sterilization device for biosafety sample collection and delivery packaging. The device employs a double-layered insulated enclosure, with a UV sterilization lamp at the top and an atomizing hydrogen peroxide nozzle on the inner wall. The atomizing nozzle sprays micron-sized aerosol particles to achieve omnidirectional dispersion of the aerosol medium within the sealed space, combined with the UV light source arrangement design to eliminate sterilization dead zones. An adjustable partition inside the enclosure allows for flexible separation of samples of different sizes, preventing cross-contamination. Ventilation holes in the enclosure walls balance internal and external air pressure, ensuring product safety. An environmental monitoring module at the bottom monitors temperature and humidity data in real time and displays it on a screen outside the enclosure, providing visualization of the internal temperature and humidity. This invention facilitates dual sterilization and is adaptable to various pathogenic microorganism disinfection scenarios, possessing characteristics such as impact resistance, corrosion resistance, non-destructive sample handling, and environmental friendliness.

To provide a fluorinated elastic copolymer in which the contents of metal elements and chloride ions are low, and a method for producing a fluorinated elastic copolymer, whereby it is possible to obtain a fluorinated elastic copolymer in which the contents of metal elements and chloride ions are low. A fluorinated elastic copolymer in which the content of metal elements is at most 20.0 ppm by mass and the content of chloride ions is at most 1 ppm by mass; and a method for producing a fluorinated elastic copolymer, which comprises coagulating a fluorinated elastic copolymer in a latex containing the fluorinated elastic copolymer by using an acid containing no metal elements or no chloride ions, and washing the coagulated fluorinated elastic copolymer with a liquid medium having a content of metal elements of at most 2.0 ppm by mass and a content of chloride ions of at most 2 ppm by mass.

The application discloses a preparation method of a silver tin oxide electric contact material with good plasticity and arc erosion resistance, and comprises the following steps: first, taking Ag ingot, Sn ingot and X ingot of an additive element to prepare Ag-Sn alloy powder with a required particle size; the obtained powder is oxidized to obtain AgSnO2 mother powder; then, the required amounts of Ag, Sn and X elements are calculated according to the component proportion of the required preparation material, and are weighed for standby, wherein the Sn and X elements are weighed in the form of AgSnO2 mother powder, and the Ag element is weighed in the form of silver nitrate and AgSnO2 mother powder; then, an alkaline substance in excess of silver nitrate is weighed, and the alkaline substance and the silver nitrate are respectively prepared into solutions; then, the weighed AgSnO2 mother powder is added into the alkaline solution, and the silver nitrate solution is continuously added for reaction to obtain AgSnO2 powder; and finally, the obtained powder is prepared into a silver tin oxide electric contact through a conventional process. The contact prepared by adopting the method has good plasticity and arc erosion resistance.

A composition includes particles of a cellulose derivative and a surface treatment compound. The particles of the cellulose derivative have an average particle size from 0.08 µm to 100 µm. The surface treatment compound is an organic compound having a long-chain alkyl group and / or an inorganic powder. The inorganic powder has an average particle size of 1 / 3 or less of the average particle size of the particles of the cellulose derivative. A cosmetic composition includes the composition. A method for producing the composition includes mixing the particles of the cellulose derivative and the surface treatment compound. In the mixing, the particles of the cellulose derivative and the surface treatment compound are dry-mixed.

The present invention relates to a method for preparing a catalyst which can produce carbon nanotubes having a higher bulk density by supporting a catalyst component under pressurized conditions, and to a method for producing carbon nanotubes using the catalyst

Provided is a method for producing a resin composition for secondary battery electrodes, the method comprising adding a binder resin to a carbon nanotube dispersion liquid which contains carbon nanotubes, a dispersing agent, and a nonaqueous dispersion medium and in which the product (X×Y) of the complex elastic modulus X(Pa) and the phase angle Y(°) at 25°C and 1 Hz obtained by dynamic viscoelastic measurement is 30 to 1,700 and the phase angle is 3° to 90°.

An application of iron oxide nanoparticles (IONPs) in the preparation of a parathyroid and / or lymph node contrast agent, wherein the particle size of the IONPs is 1-1000 nm, the polydispersity index is <0.3, the zeta-potential is -50 to 50 mV, and the peak value of an ultraviolet-visible absorption spectrum is 100-500 nm. The IONPs may accurately negatively visualize parathyroid glands and trace lymph nodes.

Provided are titanium oxide particles with excellent homogeneity and dispersibility and few coarse particles, as well as a method for their production, and a slurry, dispersion, composition and dielectric starting material that include the titanium oxide particles. In the titanium oxide particles of the invention, the D90 (LD) / D50 (LD) ratio of the titanium oxide particles as measured by laser diffraction / scattering analysis is greater than 1.0 and 2.0 or lower, and the particle concentration of coarse particles having a size exceeding 16 times the D50 (SEM)( 16 × the D50 (SEM)), for primary particles as observed under a field emission scanning electron microscope (based on number of particles), is 20 ppm or lower. For their production, a source gas and oxidizing gas are introduced into a reaction tube and reacted, with a purge medium blowing outlet being provided on the inner wall of the reaction tube, and the blowout angle of the purge medium and the blowout flow velocity (B) of the purge medium from the inner wall of the reaction tube being such that the purge medium is introduced in a swirling manner along the inner wall of the reaction tube.

Provided is a resin composition for secondary battery electrodes which contains carbon nanotubes, a dispersing agent, a fluororesin, and a dispersion medium and in which the product (X×Y) of the complex elastic modulus X(Pa) and the phase angle Y(°) at 25°C and 1 Hz obtained by dynamic viscoelastic measurement is 30 to 5,000.

The present invention relates to a biodegradable coating composition, a method for preparing same, and a biodegradable article using same. Particularly, according to an embodiment of the present invention, a biodegradable coating composition is a copolymerized polyhydroxyalkanoate (PHA) resin comprising a PHA resin, a surfactant, inorganic particles and a rheology modifier, and including 4-hydroxybutyrate (4-HB) repeating units. By using a PHA resin having a weight average molecular weight of 10,000-1,200,000 g / mol, the biodegradable coating composition is environmentally friendly due to excellent biodegradability and biocompatibility, and can have improved dispersibility, coatability, oil resistance and processability.

An antifogging agent composition which contains a copolymer (A), colloidal silica (B) and a solvent (C), wherein: (A) is a (meth)acrylate copolymer obtained from a monomer mixture which contains monomers (a-1) to (a-3); (C) contains water (C-1), a C1-4 monovalent alcohol-based solvent (C-2), a solvent (C-3) which has one or more functional groups per molecule which are selected from the group consisting of a ketone group, an ester group, two or more ether groups, a thioketone group and an amide group, and has a boiling point of 100-200°C, inclusive, and a glycol ether-based solvent (C-4) which is represented by general formula (5) (R10-O-R11-OH); and the combined total of (C-1) to (C-4) relative to 100 parts by mass of the combined total of (A) and (B), and the mass ratios of (C-3) and (C-4) relative thereto, are specific amounts. Said antifogging agent composition makes it possible to form an antifogging coating which exhibits excellent transparency, water resistance, initial adhesiveness, antifogging properties, and repeated antifogging properties, is unlikely to have water droplet marks left thereon, and also suppresses the formation of liquid droplets when applying the coating, is adhesive after pre-drying when applying a thin film of the coating, and suppresses the formation of cracks when applying a thick film thereof.

Provided is a pigment composition that includes an isoindoline compound, has excellent dispersibility, weather resistance and heat resistance, and good storage stability, and is capable of forming images having high chroma and the like, the pigment composition including an isoindoline compound represented by formula (1) and an isoindoline compound represented by formula (2). Also provided are a colorant composition, a coating material, an ink, an ink set, a printed matter, and a packaging material.

Provided is a secondary battery binder composition containing a water-soluble crosslinked polymer obtained by crosslinking a copolymer containing a (meth)acrylic acid component and a (meth)acrylic acid ester component as constitutional components by an aziridine compound, and water. Also provided are an electrode composition, an electrode sheet, a secondary battery, a production method for the electrode sheet, and a production method for the secondary battery.

While inkjet ink compositions designed to reduce migration are known, an object of the present invention is to provide an inkjet ink composition that provides, in addition to the above, sufficient adhesion to resin films as well as excellent LED curability, while allowing for printing on films used for food packaging that are subject to more stringent property requirements. As a solution, an active energy ray-curable inkjet ink composition satisfying all of the requirements of (A) to (E) below is provided. (A) it contains hydroxy group-containing monofunctional (meth)acrylates by 20.0 to 60.0% by mass in the total amount of all polymerizable components. (B) it contains polyfunctional monomers having ether bonds. (C) it contains amine-modified oligomers by 10.0 to 50.0% by mass in the total amount of all polymerizable components. (D) it contains ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate as a polymerization initiator. (E) it contains polymeric sensitizers.