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1660results about How to "Improve dispersion uniformity" patented technology

Nucleating agent master batches used for foaming of thermoplastic resin

ActiveCN101565550AConvenient injection foam moldingEasy extrusionVolumetric Mass DensityNitrogen gas
The invention relates to a nucleating agent and a method for preparing the nucleating agent, wherein the nucleating agent is used for reducing the dimension of the foaming hole and improving the density of the foaming hole when a supercritical fluid foaming agent (such as carbon dioxide or nitrogen) is used for producing thermoplastic foaming products. The raw materials of the nucleating agent mainly consists of an organic montmorillonite, a thermoplastic resin and a supercritical fluid foaming agent; the specific weight of the nucleating agent master batches is controlled within 100+/-5% of that of the thermoplastic resin. The method has the advantages that a supercritical fluid foaming method is adopted to prepare the nucleating agent master batches which have approximate specific weights to the resin material adopted by the subsequent foam forming, thus facilitating the subsequent injection foam forming and extrusion foam forming; and the carbon dioxide or nitrogen in supercritical state is used for reducing the viscosity of the carrier resin during the mixing process, the dispersion uniformity of the peeled sandwich montmorillonite in the carrier resin is reinforced, the process temperature is reduced, the layer spacing of the sandwich nano-montmorillonite which may be not peeled is increased and the sufficient peeling is realized.
Owner:BEIJING CHN TOP MACHINERY

Manufacturing technology of molybdenum-based rare-earth alloy slab and equipment thereof

The invention relates to a process for manufacturing the molybdenum based rare earth alloy plate and equipment for manufacturing the same, wherein pure molybdenum powder is simultaneously added with four rare earth oxides of ZrO2, Y2O3, La2O3 and Nd2O3 according to certain ratio, by utilizing the chrematistics of long and large crystal grain and strong sag resistance and anti-creep property of rare earth alloy elements and the dispersion strengthening function, the re-crystallization temperature of the metal molybdenum is increased, the mechanical performances of the molybdenum based material such as tensile property, yielding behavior and extensibility are improved, and the application range of the molybdenum based material is widened; and the manufacturing process comprises production procedures of material preparation treatment, mixing treatment, forming treatment, sintering treatment, material making treatment and the like and the setting of various technical parameters of special technical equipment and process. With the preparation process, the molybdenum based rare earth alloy plate which has the advantages of good electric conductivity and heat conductivity, excellent high-temperature resistance and corrosion resistance and better mechanical performances such as tensile property, yielding behavior and extensibility, and fills in domestic blank and can replace the imported material can be manufactured.
Owner:四平市北威钼业有限公司

Preparation process of lithium ion battery negative paste, lithium ion battery negative pole plate and lithium ion battery

The invention belongs to the technical field of a lithium ion battery, and relates to a preparation process of lithium ion battery negative paste, a lithium ion battery negative pole plate and a lithium ion battery. The preparation process of the lithium ion battery negative paste comprises the following steps of (a) mixing a negative active substance, a conductive additive, a dispersion agent anda thickening agent in a dried way to obtain mixed powder; (b) adding a solvent, performing uniform mixing to obtain primary paste with solid content being 67-69wt%; (c) adding the solvent again, performing uniform mixing to obtain secondary paste with solid content being 58-62wt%; (d) adding the solvent again, performing uniform mixing to obtain third paste with solid content being 54-56wt%; and(e) adding a binding agent into the third paste, and performing uniform mixing to obtain the lithium ion battery negative paste. The process is simple and is easy to operate, the preparation time canbe remarkably prepared, the equipment utilization ratio is improved, meanwhile, the mixing is uniform, and the dispersion performance, the consistency and the fineness of the paste are improved.
Owner:BEIJING NAT BATTERY TECH

In-situ cross-linked polymer binding agent for lithium ion battery and electrode prepared from same

The invention discloses an in-situ cross-linked polymer binding agent for a lithium ion battery and an electrode prepared from the in-situ cross-linked polymer binding agent. The polymer binding agent is of a three-dimensional network structure and is formed through in-situ polymerization of chitosan, at least one of polymers containing a carboxyl group or a carboxylate group, and at least one of micromolecule polybasic carboxylic acid and micromolecule polybasic carboxylate. An amidogen group on a chitosan molecular chain and a carboxyl group of the other polymer form a three-dimensional network structure in situ through electrostatic interaction at the room temperature, and dispersion uniformity of active materials in the electrode is improved. When the polymer binding agent is in use, a pole piece is subjected to further heat treatment, the cross-linking effect of the polymer chains is enhanced, and the stability of the electrode structure in the cycle process is improved. The electrochemical performance of the electrode of the lithium ion battery can be improved when the in-situ cross-linked polymer binding agent is used for preparing the electrode in situ, and particularly a more obvious improving effect is achieved on high specific capacity positive pole lithium-rich materials, a negative pole silicon substrate, tin-based materials and Li-S-based materials.
Owner:GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG

Light diffusion agent mother material used for light diffusion film, preparation method and application thereof

The invention provides a light diffusion agent mother material used for a light diffusion film, a preparation method and application thereof. A light diffusion agent is compounded from organic polymer cross linking microspheres with different refractive indexes and grain diameters, the light diffusion agent mother material is prepared from 100 weight parts of polyester resin, 60 to 100 weight parts of compounded light diffusion agents and 1 to 7 weight parts of diffusion resin through high-speed diffusion and fused extrusion grain cutting by a double-screw extruding machine. The invention also provides a high-transparency heat-resistance light diffusion film prepared by using the light diffusion agent mother materials as additives. The light diffusion layer of the light diffusion film is formed by mixing the light diffusion agent mother materials and polyester slices according to the mixture ratio of 40 to 60 weight percent of polyester slices and 40 to 60 weight percent of the light diffusion agent mother materials. The light diffusion film prepared by the invention has high light transmission rate, high mist degree, excellent heat resistance performance and excellent dimension stability, and is particularly suitable for being used as the light diffusion film in a back light module of a large-dimension liquid crystal display.
Owner:JIANGSU POLYTECHNIC UNIVERSITY +1

Flexible composite solid-state electrolyte, full-solid-state lithium-ion battery and preparation method thereof

The invention provides a flexible composite solid-state electrolyte, a full-solid-state lithium-ion battery and a preparation method thereof. The solid-phase mixing of a sulfide solid-state electrolyte or a modifier thereof, a thermoplastic polymer or a modifier thereof and lithium salt enables the composite solid-state electrolyte to have good flexibility while improving the dispersion uniformityand effective contact of each component. A halide, phosphate and / or an oxide are added to the sulfide material especially before the composition of the sulfide solid-state electrolyte and the polymersolid-state electrolyte, thereby providing a multi-dimensional channel for lithium ion transmission, increasing the disordered degree of lithium ion distribution, and being capable of further improving the lithium ion conductivity and electrochemical stability of the composite solid-state electrolyte. The flexible composite electrolyte has the advantages of high lithium conductivity at the room temperature, good electrochemical stability, easy preparation and processing, ability of being bent and cut and the like. The formed flexile full-solid-state battery has good mechanical performance andbending performance, and improves the cycle life and energy density.
Owner:CHINA ACADEMY OF SPACE TECHNOLOGY

Method for preparing carbon nanometer paper enhanced conductive polymer matrix composite material

The invention provides a method for preparing a carbon nanometer paper enhanced conductive polymer matrix composite material, which is intended to solves a problem that integral mechanical properties and electroconductivity of a current carbon nanotube composite material cannot completely reaches engineering application requirements. Multi-walled carbon nanotubes or single-walled carbon nanotubes and graphene oxide are dispersed in a plasma aqueous solution under action of supersonic waves by an anionic surfactant, after high speed centrifugation, a supernatant liquid of the carbon nanotubes and graphene oxide solution is obtained, and flexible carbon nanometer paper with thickness of 10-100mum can be prepared as an enhanced material by a vacuum filtration method. The carbon nanometer paper enhanced conductive polymer matrix composite materials can be prepared by an RTM forming or vacuum bag method, and conductivity can be raised by raising the content of the carbon nanotubes and dispersion uniformity of carbon nanotube grids in the composite material, wherein the conductivity of the nanocomposite can be raised in several orders of magnitude, and can reach 1-200S / m, thereby making the polymer matrix composite materials go into a semiconductor conductive material field from an insulator.
Owner:SHENYANG AEROSPACE UNIVERSITY

Modified asphalt waterproof coating, preparation method for modified asphalt waterproof coating and use method thereof

ActiveCN106957601AAvoid reunionTechnical effect of avoiding subsidenceBituminous coatingsBituminous waterproofingSlurry
The invention discloses a modified asphalt waterproof coating, a preparation method for the modified asphalt waterproof coating and a use method thereof and relates to the field of building materials. The problems of sound insulation and noise reduction of the waterproof coating film can be solved. The preparation method for the modified asphalt waterproof coating disclosed by the invention comprises the following steps: preparing the modified asphalt waterproof coating from a component A and a component B; mixing and uniformly stirring anion emulsified asphalt, polymer emulsion and slurry, thereby acquiring the component A; and uniformly mixing water with curing agent, thereby acquiring the component B, wherein the slurry is prepared according to the following steps: adding water, stabilizer, dispersing agent, wetting agent, de-foaming agent, fine powder and pH regulator into a dispersing device, dispersing for the first time, adding a silencing filling material soaked with a silane coupling agent solution after ending the dispersing for the first time, and then adding a thickening agent, dispersing for the second time and then ending the dispersing for the second time, thereby acquiring the slurry. The modified asphalt waterproof coating disclosed by the invention has excellent effects of sound insulation and noise reduction on the basis of excellent waterproof property.
Owner:BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD

Production method for mixing rubber material at low temperature

A production method for mixing rubber material at a low temperature adopts a novel rubber mixing method improved on the basis of a low-temperature mixing principle so as to realize the high-quality and high-efficiency novel technology of mixed rubber production. An internal mixer is utilized and low-temperature mixing and low-temperature material discharge are taken as the objective function, a plurality of full automatic open mills are configured at the lower part of the internal mixer, supplementation mixing is carried out under low-temperature conditions so as to achieve automatic curing temperature, and the low-temperature mixing is ensured during the integral rubber material manufacturing process, and the purpose of high-quality and high-efficiency mixed rubber production can be achieved. The rubber material is put in the internal mixer so as to be mixed, the rubber material is discharged to an open mill number 1 after reaching the temperature reuquired by the technology and then rubber smashing and temperature reduction are carried out, then rubber material is conveyed to one of the open mills in an open mill set through a conveying device and the supplementation mixing is carried out, and the rubber material that is processed through the supplementation mixing is conveyed to an open mill number 8 and the piece unloading process can be carried out.
Owner:SAILUN GRP CO LTD

Preparation method of carbon fiber reinforced nylon composite micro-powder for selective laser sintering

The present invention discloses a preparation method of carbon fiber reinforced nylon composite micro-powder for selective laser sintering. The method comprises: carrying out surface pre-treatment on carbon fiber powder, adding the pre-treated carbon fiber powder and nylon particles into a polymer good solvent containing a dispersing agent, carrying out heating stirring to completely dissolve the polymer, adding a poor solvent of nylon to make the nylon gradually crystallize by adopting the carbon fibers as the crystal nucleus and be coated on the carbon fiber surface, carrying out suction filtration, drying, screening, and adding other auxiliary agents to obtain the carbon fiber reinforced nylon composite micro-powder for selective laser sintering. Compared to the method in the prior art, the method of the present invention has characteristics of no requirement of high-temperature and high-pressure equipment, simple process, economy, effectiveness, environmental protection, and easy performing; and the sintering performance of the prepared material is excellent, the carbon fiber content in the material is controllable, and the mechanical property of the obtained SLS molded member is substantially improved compared to the SLS molded member of the matrix resin material.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI

Polishing solution for hard disk magnetic head and preparation method thereof

The invention discloses polishing solution for a hard disk magnetic head and a preparation method thereof. The polishing solution is mainly prepared from diamond abrasive particles, a dispersing agent, a corrosion inhibitor, a phase transfer solvent, an oil phase medium regulator and a hydrocarbon solvent, wherein the average particle size of the diamond abrasive particles is 30 to 150nm, the particle size distribution of the particles is 20 to 300nm, and the length-diameter ratio of the particles is 1.0 to 2.0. The preparation method comprises the following steps of: mixing diamond powder and a surface modifier, grinding, removing impurities, and grading to obtain suspension slurry; adding the phase transfer solvent into the suspension slurry, and stirring and dispersing the system; removing fine particles and coarse particles in the phase transfer solvent system by grading to ensure that the particle size distribution and concentration of the diamond abrasive particles meet the requirements; and transferring to the hydrocarbon solvent, adding the oil phase medium regulator, the dispersing agent and the corrosion inhibitor, and uniformly stirring to obtain the polishing solution for the hard disk magnetic head. The polishing solution prepared by the method has high suspension stability and dispersion uniformity, and high polishing efficiency during polishing, and a machined surface has high quality.
Owner:CHANGSHA RES INST OF MINING & METALLURGY
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