15 results about "Microparticle" patented technology

The biodegradable drug delivery systems described here are formulated for implantation into the nail unit and its surrounding tissues for the treatment of various nail unit conditions. The systems include non-temperature dependent phase change compositions that may be formulated as solutions, solids, semisolids, microparticles, or crystals.

The invention discloses magnetically fluorescent bifunctional microsphere and a preparation method thereof. The nanometer microspheres with the magnetically fluorescent function are obtained mainly by wrapping the surfaces of magnetic nanoparticles with polyaniline macromolecules and successfully connecting fluorescent nanometer material quantum dots through functional amino groups at the terminals of the polyaniline macromolecules. The magnetically fluorescent nanometer microspheres have the excellent fluorescence characteristics of the quantum dots and the superparamagnetism of the magnetic particles and can be collected and separated through a simple applied magnetic field. The magnetically fluorescent bifunctional microspheres can be applied to the fields of immunodetection, targeted therapy, cellular seperation and the like.

A curable resin composition which contains a curable resin (A) having two or more polymerizable unsaturated bonds in a molecule, and polymer microparticles (B), and which optionally further contains an epoxy resin (C) and a low-molecular-weight compound (D) having a molecular weight less than 300 and having at least one polymerizable unsaturated bond in a molecule,

• • wherein the content of component (B) is 1 to 100 parts by mass per 100 parts by mass of the sum of component (A) and component (D),
  • the content of the epoxy resin (C) is less than 0.5 parts by mass per 100 parts by mass of the sum of component (A) and component (D),
  • component (A) has an epoxy (meth)acrylate content less than 99 parts by mass per 100 parts by mass of the whole component (A), and
  • component (B) has been dispersed in the state of primary particles in the curable resin composition.

A method for producing a slurry for a heat-resistant layer for a lithium ion secondary battery, including: a step of producing a polymer aqueous dispersion by polymerizing a monomer in an aqueous medium to give a polymer aqueous dispersion containing a polymer with a polymerization conversion rate of 90 to 100%, a step of obtaining a mixed solution by mixing N-methylpyrrolidone and the polymer aqueous dispersion, a step of obtaining a binder composition by removing an unreacted monomer and the aqueous medium from the mixed solution, and a step of obtaining a slurry by dispersing non-conductive microparticles in the binder composition, wherein the step of obtaining the binder composition includes removing the aqueous medium and the unreacted monomer by using a distillation column under a reduced pressure so that the binder composition contains the unreacted monomer and a water content in predetermined amounts.

The invention provides an n-alkene isomerization catalyst. The catalyst contains 50-90% (by mass) of a molecular sieve and the balance aluminum oxide; the molecular sieve is composed of SAPO-11 and ZSM-5, wherein SAPO-11 accounts for 75-90% (by mass) of the total mass of the molecular sieve, and ZSM-5 accounts for 10-25% (by mass) of the total mass of the molecular sieve; the microparticle size of the molecular sieve in the catalyst is 1-2 micrometers. The catalyst has high n-alkene isomerization activity, the isoalkene yield is high and can be maintained for a long time, a long one-way running cycle is achieved, the decreasing amplitude of regeneration performance obtained after multiple times of scorching is small, and the catalyst is suitable for the process of preparing isobutene from n-butene through an isomerization reaction and the process of preparing isopentene from n-pentene through an isomerization reaction and particularly suitable for the process of preparing isobutene through post-etherification C4 n-butene isomerization.

The invention provides a clopidol controlled-release microparticle preparation and a preparation method thereof. The clopidol controlled-release microparticle preparation has a core-shell structure, a mineral carrier which adsorbs clopidol forms a system inner core, and calcium alginate gel forms a system outer shell. The clopidol controlled-release microparticle preparation can effectively avoid burst release of drug in stomach, so that irritation to the stomach by the drug is reduced, and adverse reaction of a gastrointestinal tract is reduced. Granularity of the preparation is 50-900 micrometers, so that the preparation is convenient for being uniformly mixed with feed and conducive to livestock and poultry absorption, and bioavailability of the drug is improved. The preparation method is simple, and the preparation is free of dust pollution and suitable for industrialized production.

The invention provides a divided type dental polymeric core build-up material including a first paste (A) and a second paste (B), in which each of the pastes is a paste obtained by mixing at least a (meth)acrylate monomer, a filler having a particle size distribution within a range of 0.1 through 40 μm and an average particle diameter of 0.7 through 10 μm, and a fine particle filler having an average particle diameter of primary particles of 0.001 through 0.050 μm, and having a viscosity at 25° C. of 280 through 470 P, and in which one of the pastes includes an oxidant and the other includes a reductant and at least one of the pastes includes a photopolymerization catalyst. The divided type dental polymeric core build-up material of this invention has high operability in core build-up and forms a polymerically cured substance with a good mechanical property.

The invention discloses a sewage treatment agent. The sewage treatment agent comprises the following components: 10-20 parts of magnetic iron powder, 32-48 parts of polyferric chloride, 10-15 parts ofpolyacrylamide, 18-30 parts of poly aluminum ferric silicate, 24-48 parts of zinc sulfate, 25-40 parts of bentonite and 10-20 parts of activated carbon. The sewage treatment agent provided by the invention can realize sewage treatment by flocculation, magnetization adsorption and physical adsorption, and has a good treatment effect; the magnetic iron powder can effectively attract charged microparticles in the sewage treatment agent and make the charged microparticles agglomerated, the polyacrylamide and the poly aluminum ferric silicate are also used, so that the sewage treatment agent can achieve the purpose of rapid sedimentation, and improve the treatment efficiency; and at the same time, the sewage treatment agent can remove composite pollutants such as organic matter and heavy metals commonly found in water sources, reduce a color and turbidity of water, and further improve the treatment effect.

A continuous solid-liquid mixing and granulating apparatus is composed of tower-type main body with hollow mainshaft, motor, speed regulator, granulating head with spray hols, and built-in scavenger. The mixture of molten material and microparticles is sprayed out from said granulating head and then solidified.

A manual fogging device for high-voltage salt fog test relates to the technical field of recycling equipment to extract high-potassium microparticle mixed fertilizer. The manual fogging device for high-voltage salt fog test is structurally characterized in that hanging ropes are hung to a cross beam, a frame is fixed to the cross beam via the hanging ropes, a weight is fixed to the bottom of the frame via ropes, the frame and the ropes are covered with rain cloth, a nozzle is arranged in the frame, the rear end of the nozzle is communicated with a pressure system through an air duct, and a side fog inlet of the nozzle is communicated with a water tank via a water pipe. The manual fogging device for high-voltage salt fog test has the advantages that the manual fogging device for high-voltage salt fog test has good high-voltage test insulation and can be precisely adjusted, and a fogging function for quick setup in a limited area can be achieved.

The present invention relates to composites, comprising inorganic and/or organic pigments and/or fillers in the form of microparticles, the surface of which is coated at least partially with finely divided nano-dolomite with the help of binders based on copolymers comprising as monomers one or more dicarboxylic acids and one or more monomers from the group of diamines, triamines, dialkanolamines or trialkanolamines, a method for producing such composites, aqueous slurries thereof, their use, and the use of the inventive binders for coating the microparticles with nano-dolomite.

A projection lens, a projection device and an optically-induced microparticle device are provided. The projection lens includes an aperture, a first and a second lens groups. The aperture, the first and the second lens groups are disposed on a projection path of an image. The aperture is between the first and the second lens groups. The first and the second lens groups are suitable for interchanging with each other to switch the magnification ratio. When in a first state, the first lens group is between the object and the aperture and the second lens group is between the aperture and a projection surface, herein the projection lens has a first magnification ratio. When in a second state, the first lens group is between the aperture and the projection surface, and the second lens group is between the object and the aperture, herein the projection lens has a second magnification ratio.

The invention discloses a direct cooling type intelligent automation numerical control low-temperature dispersion smashing and grinding complete facility. The purpose of keeping effectively reducing the ecological environment state can be achieved in the mode that materials are continuously ground to achieve the state from the freezing point to the low temperature, the maximum and minimum limit temperatures can be set to enable the materials to be subjected to backflow circulation and fine smashing and grinding operation, a refrigeration source serves as an indirect medium source and makes nocontact with a medium, the ground and smashed materials are located in the low temperature state through the direct cooling type cooling, then the ultrafine powder smashing ideal effect is achieved under the combined action of the mutual repeated impact, friction and collision of the materials, the high-speed cutting, mixing, stirring operation, emulsification, homogenization, grinding operation and the like, the friction temperature rise phenomenon in the material grinding dispersion process is avoided through the double modes of exterior range cooling and interior direct cooling ball directcooling, and the direct cooling balls can play a role in improving the grinding dispersion effect. The direct cooling type intelligent automation numerical control low-temperature dispersion smashingand grinding complete facility is suitable for freshness-keeping fidelity and quality-guaranteeing scientific research and industry fields of the food, the bioengineering, the medical treatment, the pharmacy, the health care, nanometer materials and the like.

The invention relates to the use of a concentrated steeping liquor from the starch industry, referred to as corn steep, as a means for controlling the risks of fire caused by self-heating and the risks of explosion of dust caused by the particles and microparticles contained in the inflammable organic materials from the extractive industry, as well as by explosive gases released during the self-heating process during the storage, transport, and/or handling thereof. The concentrated steeping liquor of the invention is diluted with water and mixed with the material to be treated in respective proportions so as to obtain, for an index P up to 315 μm, a percentage of fines at most equal to 6%.