53results about How to "Prevent excessive aggregation" patented technology

The lithium rechargeable battery of the present invention is provided with a current collector and an active material layer containing active material particles 10 supported on this current collector. The active material particles 10 are secondary particles 14 in which a plurality of primary particles 12 of a lithium transition metal oxide are aggregated, and have a hollow structure that contains a hollow section 16 formed inside the secondary particle 14 and a shell section 15 that surrounds the hollow section 16. A through hole 18 that penetrates from the outside to the hollow section 16 is formed in the secondary particle 14. The ratio (A/B) in a powder x-ray diffraction pattern of the active material particles 10, where A is the full width at half maximum of the diffraction peak obtained for the (003) plane and B is the full width at half maximum of the diffraction peak obtained for the (104) plane, satisfies the equation (A/B)≦0.7.

This invention relates to a rubber composition and a method of manufacturing the same, and particularly to a technique of improving a fracture resistance in a silica-containing rubber composition by improving dispersion of the silica.

An aqueous dispersion of metal oxide fine particles, including metal oxide fine particles, a carboxylic compound and an acid compound containing a bulky anion having B value of −0.01 or less in Equation (1), wherein the metal oxide fine particles, the carboxylic compound and the acid compound containing a bulky anion are dispersed in an aqueous solution, and the aqueous dispersion of metal oxide fine particles has a light transmittance at 800 nm wavelength of 90% or more:

η=η⁰(1+A√c+Bc)   Equation (1)

• • where η represents a viscosity of a solution, η⁰ represents a viscosity of a solvent, A and B respectively represent an inherent constant value of an acid, and c represents a concentration of the solution.

The present invention provides an aqueous-dispersion-type pressure-sensitive adhesive composition and a pressure-sensitive adhesive sheet formed thereof. This composition comprises a rubber latex, a tackifier resin emulsion, a dispersant composed primarily of a polycarboxylic acid (salt) having a hydrophobic side chain, and an emulsifier composed primarily of a polyoxyethylene alkyl ether sulfuric acid ester having an average polymerization degree of 16 to 80. A preferred dispersant contains carboxyl group at 2 to 6 mmol/g and an aqueous solution thereof at 1% by mass has a surface tension of 25 to 45 mN/m.

To provide a sialon-based phosphor capable of forming a thin film by mixing it with a resin, and giving a uniform photoluminescent light with high light emission intensity, and to provide a method for producing a sialon-based phosphor not having excessively large agglomerated particles and a wide particle size distribution, there is provided a method for producing an α-sialon based phosphor represented by the formula:

M_xLn_ySi_12-(m+n)Al_(m+n)O_nN_16-n

wherein M is at least one metal selected from Ca, Mg, Y and Li, Ln is at least one lanthanide metal selected from Eu, Dy, Er, Tb, Yb and Ce, ax+by=m (assuming that the valence of metal M is a and the valence of lanthanide metal Ln is b), 0<x≦1.5, 0.3≦m≦4.5, and 0<n<2.25), wherein the silicon nitride raw material used as the raw material is a silicon nitride raw material powder comprising amorphous silicon nitride and crystalline silicon nitride.

A method for preparing spinnable pitch from coal tar pitch comprises the following steps: crushing medium-low-temperature coal tar pitch to 20 meshes or below, performing extracting by using tetrahydrofuran, performing filtration to obtain a medium-low-temperature coal tar pitch soluble component, and recovering the tetrahydrofuran solvent from the soluble component to obtain refined pitch; and mixing the refined pitch with petrolatum, adding the obtained mixture into a reactor, introducing nitrogen under normal pressure, heating the reactor to 180-220 DEG C at a heating rate of 1-10 DEG C/min, switching to air, introducing the air into the reactor at a rate of 10-60 mL/min.g, heating the reactor to 280-350 DEG C at a heating rate of 1-10 DEG C/min, and allowing the obtained mixture to stay for 1-10 h to obtain the spinnable pitch. The method has the advantages of high yield, low price and moderate thermal polycondensation temperature.

This invention is a method of minimizing the variation of cell growth and production through homogeneous cell line development. To be more specific, it is the method of isolating and proliferating single cell clone from the procambium to promote the stability of the plant-derived biologically active substances production by solving the problems of decrease in cell growth and the productivity during the long term culture.

Platinum particles have been formed as porous, hollow tubular dendrites by using silver dendrite particles in a galvanic replacement reaction conducted in an aqueous solution of a platinum compound. The dendritic platinum particles have been found useful as catalysts and particularly useful as a hydrogen-oxidation electrocatalyst and/or an oxygen-reduction catalyst in a polymer electrolyte membrane fuel cell.

The invention discloses a guiding method for avoiding excessive gathering and parking of shared bikes, and aims at enabling users to park shared bikes outside gathering areas through an economic way.According to the method, users can decide whether to allow extra price for continuously parking the shared bikes in gathering areas or not according to clear hints; and meanwhile, a bike transfer service function is added in a shared bike APP to encourage the users to move the shared bikes out from the gathering and parking areas via short time and short distance and then obtain red packets. According to the method, the operation cost of shared bike enterprises is greatly reduced, and the shared bikes are distributed more reasonably and naturally on the basis of not increasing the operation cost, so that the phenomenon that the shared bikes are excessively gathered and parked is avoided.

The invention discloses a high barrier PET/PP film, which is prepared by adding PP plastic particles and PET plastic particles into a co-extrusion casting film machine, and comprises a PET layer and a PP layer, wherein the PP plastic particles are prepared through blending modification, N,N'-(4,4'-methylenebiphenyl)bismaleimide, methylolpropane trimethyl acrylate, and 4,4'-dihydroxy diphenyl sulfide are added to improve the barrier property, the PET plastic particles are modified through a synthetic modification method, terephthalic acid and ethylene glycol are adopted as base materials, and 2-amino terephthalic acid, 2-nitro-terephthalic acid-4-methyl ester, 1,4-diacetoxybenzene, 1,4-benzenedimethanol, 2,2-dimethyl-1,3-propanediol, 2,3-dibromo-2-butene-1,4-diol, dimethyl 2-bromoterephthalate, 2,2-difluoro-1,3-benzodioxole, and magnesium fluorosilicate are added to adjust the performance. According to the present invention, the PET plastic particles and the PP plastic particles are extruded through the co-extrusion casting cast film machine to prepare the multi-layer casting film, wherein the effects of good high-barrier, fire retardation and bacterial resistance can be achieved through the complementation between the two materials.

According to the method of producing toner, toner is produced by (i) forming particles of a pigmented resin by applying shear stress to a mixture of a pigmented resin composition, an organic solvent, a polymer dispersing agent, and a hydrophobic medium, the organic solvent being capable of reducing viscosity of the pigmented resin composition, and said polymer dispersing agent having a glass transition point in a range of 50° C. to 80° C. and an SP value in a range of 8.5 to 10, (ii) distilling off the organic solvent, and (iii) separating the toner from the hydrophobic medium and drying the toner. With the above arrangement, the method makes it possible to (i) easily downsize toner particle without causing thermal decomposition of a resin or separation of a release agent, and (ii) produce toner that is small in particle size, excellent in humidity-resistance, and less likely to aggregate.

The invention belongs to the field of preparation of composite conductive fibers and relates to a preparation method of a polyvinyl alcohol composite conductive fiber. According to the preparation method, firstly, polyvinyl alcohol is used as a base body, copper sulfate and sodium thiosulfate are used as raw materials, nano cuprous sulfide is produced in situ through a chemical reaction in a polyvinyl alcohol aqueous solution, a nano cuprous sulfide/polyvinyl alcohol composite spinning solution is obtained, and the nano cuprous sulfide/polyvinyl alcohol composite conductive fiber with lasting conductivity is prepared from the spinning solution in a wet spinning manner. The traditional polyvinyl alcohol wet spinning technology is adopted, existing requirement is not required to be transformed or replaced, the equipment investment is low, the technological route is simple, the operability is high, and the production efficiency is high. According to the preparation technology of the conductive fiber, the conductive network is formed in the fiber, a conductive layer cannot fall off during usage, the effect of the use environment is avoided, and the conductive function is lasting.

The invention discloses a preparation method of mesophase pitch, the method comprises N times of thermal polymerization reactions, N is an integer greater than 1, preferably an integer greater than 2, and further preferably 2; rapid cooling treatment is carried out after each thermal polymerization reaction; the cooling rate is 20-150 DEG C/min, preferably 50-100 DEG C/min, and the temperature is rapidly reduced to 60%-90% of the temperature of the thermal polymerization reaction, preferably 60%-90%. The method can be used for continuously producing the high-purity mesophase pitch and can be used for producing high-end carbon fibers.

The invention discloses a catalyst for producing an environment-friendly diesel additive and a preparation method of the catalyst. The catalyst prepared by in-situ compounding of WO3/ZrO2-Bi2O3 solidsuperacid and zirconium-based solid ionic liquid is prepared through the steps of preparation of a zirconium-bismuth composite oxide, preparation of the solid superacid, preparation of an ionic liquidprecursor MIMPS and in-situ loading of the zirconium-based solid ionic liquid, wherein the mass fraction of the WO3/ZrO2-Bi2O3 solid superacid in the catalyst is 70 to 90wt%. According to the invention, the problems of difficult separation of the catalyst and a product and poor stability caused by easy loss of reactive components can be solved; the catalyst can be kept in a solid state, and the acid content and the acid strength of the catalyst are relatively moderate, so the catalyst has no corrosivity to a reactor; and the catalyst has high catalytic efficiency and is good in selectivity ofthe obtained main product.

A main object of the present invention to provide a coated pigment that is composed of a composite particle comprising a silicon compound coated on the surface of a metal particle, and that can be dispersed with relatively few aggregates.

The present invention relates to a coated pigment comprising a composite particle containing a metal particle and one or two or more coating layers on the surface of the metal particle, wherein (1) at least one of the coating layers is a silicon compound-containing layer, and (2) the proportion of aggregates formed by adhesion of at least four of the composite particles with each other is not more than 35% by number.

The invention belongs to the field of preparation of composite conductive fibers and relates to a preparation method of a nano cuprous iodide/polyvinyl alcohol composite conductive fiber. According to the preparation method, polyvinyl alcohol is used as a base body, copper sulfate, sodium thiosulfate and potassium iodide are used as raw materials, nano cuprous iodide is produced in situ through a chemical reaction in a polyvinyl alcohol aqueous solution, a nano cuprous iodide/polyvinyl alcohol composite spinning solution is obtained, and the nano cuprous iodide/polyvinyl alcohol composite conductive fiber with lasting conductivity is prepared from the spinning solution in a wet spinning manner. According to the preparation technology of the conductive fiber, the conductive network is formed in the fiber, and the conductive function is lasting. Light-color nano CuI conductive powder is selected as a conductive agent, and the fiber is prone to dyeing and has broader application prospect in fields of civil clothing, interior decoration, carpets, home textiles, micro-electronics, medicine, food, precise instruments, biotechnology and the like.

The invention discloses a catalyst for producing an environment-friendly diesel additive and a preparation method of the catalyst. The catalyst is obtained through preparation of a zirconium-tin composite oxide, preparation of MoO<3>/ZrO<2>-SnO<2> solid superacid, preparation of an ionic liquid precursor PYPS and in-situ loading of tin-based solid ionic liquid, wherein the mass fraction of the MoO<3>/ZrO<2>-SnO<2> solid superacid in the catalyst is 75-85 wt%, and the tin-based solid ionic liquid is one selected from a group consisting of Sn[PYPS]<2>SiMo<12>O<40>, Sn<0.5>[PYPS]<3>SiMo<12>O<40>and Sn<1.5>[PYPS]SiMo<12>O<40>. The catalyst provided by the invention can solve the problems of difficult separation of the catalyst from a product and poor stability caused by easy loss of reactivecomponents, can maintain a solid state, has relatively moderate acid content and acid strength, does not corrode a reactor, and has high catalytic efficiency and good main product selectivity.