63results about How to "Good electrification" patented technology

The invention relates to graphene-modified resin powder coating and a production process thereof. The graphene-modified resin powder coating comprises the following components in percentage by weight: 50-80 percent of resin, 0-40 percent of filler, 5-7 percent of an auxiliary agent, 0.2-3 percent of pigment and 0.005-30 percent of graphene. According to the graphene-modified resin powder coating provided by the invention, a proper amount of graphene is added in the traditional resin powder coating, so that the mechanical property, the conductivity, thermal conductivity, flame resistance, corrosion resistance and weather resistance of the resin powder coating are greatly improved; the graphene-modified resin powder coating has a broad market prospect.

The invention discloses a high weather-proof and corrosion-resistant powder paint for a satellite earth antenna. The paint comprises, by weight, 100-150 parts of polyester resin, 20-40 parts of GMA acrylic resin, 0-5 parts of beta-hydroxyalkylamide, 0-10 parts of assistants, 0-100 parts of paddings and 0-3 parts of pigments. The invention further discloses a preparation method for the powder paint. A coating after being coated by the paint and curing is good in mechanical properties, super-weather-proof, salt mist resistant, and provided with stable low gloss area.

Hydrophobic inorganic fine particles are provided which prevent a toner from fusing to a photoreceptor or fouling a contact charging member and which enable the toner to be excellent in flowability, electrification characteristics, and durability even after long-term storage in a high-temperature high-humidity atmosphere. The fine particles prevent the toner from dropping or fouling the inside ofthe printer. The hydrophobic inorganic fine particles are obtained by: treating the surface of inorganic fine particles with a silicone oil and then with a silane compound and / or a silazane compound or treating the surface of inorganic fine particles with a silane compound and / or a silazane compound in the presence of a silicone oil; and further treating the treated inorganic fine particles with a silicone oil.

The invention provides a colorful powdered ink used for static development. Grains with nucleus-shell structures are formed into powdered ink grains in an agglomeration mode; the powdered ink grains contain a nucleus-forming resin A and a shell-forming resin C which are made of same or different components; and the total content of the two resins accounts for 60%-85% of the powdered ink grains. The invention also provides a preparation method of the colorful powdered ink, and the method comprises the following steps: quickly dispersing a colorant dispersing solution, a wax dispersing solutionand an emulsion of the nucleus-forming resin A, thereby forming agglomerated nucleus grains B in a system; then adding a mixture of the emulsion of the shell-forming resin C and a charge control agent, thereby agglomerating into the grains D with the nucleus-shell structures around the nucleus grains B; increasing the temperature so that the grains D with the nucleus-shell structures are agglomerated into powdered ink grains E; and performing spherical treatment on the powdered ink grains E, thereby forming the powdered ink grains F. The powdered ink grains F prepared according to the preparation method provided by the invention are excellent in spherical degree, narrow in grain distribution, excellent in electric property and excellent in durability. The problems of photosensitive drums and developing roller pollution caused by easy separation between a colorant and a release agent are solved.

There is a surface activation treated face 3 on at least one face of a glass fiber reinforced electrically conductive fluoro resin sheet 2. A dividing sheet 1 for hot press bonding is obtained by integrating the surface activation treated face 3 of the fluoro resin sheet and a vulcanized heat conductive electrically conductive silicone rubber laminate 4. The manufacturing method the dividing sheet comprises performing a surface activation treatment on at least one side of the glass fiber reinforced electrically conductive fluoro resin sheet 2, and integrating the surface activation treated face 3 of the fluoro resin sheet and the vulcanized silicone rubber laminate 4, in which the laminate was made by impregnating a glass cloth with electrically conductive fluoro resin mixture, sintering to form composite sheet, coating liquid heat conductive electrically conductive silicone rubber on at least one face of the sheet and thermally curing to form integrated laminate. Therefore, a dividing sheet for hot press bonding with high anti-electrostatic effect, excellent dividing capability and high durability can be provided.

The toner for electrostatic charged image development of the present invention is characterized in that it contains at least a binder resin, a mold releasing agent and magnetic metal particles, and the solubility of the magnetic metal particles in a 1 mol / l aqueous HNO3 solution at 50 DEG C. is 500 mg / g.l or less.

The present invention provides a toner and a developer which includes the toner. The toner is produced in an aqueous medium and includes at least a binding resin, a colorant and a dispersant which disperses the colorant. The binding resin contains 50% by mass to 100% by mass of a polyester resin, and the colorant is a pigment whose surface is given an acid treatment. The acid value of the dispersant is 1 mg KOH / g to 30 mg KOH / g, and the amine value of the dispersant is 1 mg KOH / g to 100 mg KOH / g.

Disclosed is a toner for electrostatic image development that satisfies both low-temperature fixing ability and excellent high-temperature storage stability, achieves excellent charge property and shatter resistance, and consequently can form a high-quality image even by a high-performance machine such as a high-speed machine. The toner is composed of toner particles obtained by forming a shell layer containing a styrene-acryl-modified polyester resin on the surface of each of core particles comprising a binder resin containing at least a styrene-acrylic resin. The styrene-acryl-modified polyester resin is obtained by bonding a styrene-acrylic polymer segment to a terminal of a polyester segment, and the content of the styrene-acrylic polymer segment in the styrene-acryl-modified polyester resin is 5% by mass or more and 30% by mass or less.

Provided is an electrophotographic positively charged toner and a manufacturing method thereof, according to which even if after kneading, pulverization and classification the toner is made spherical by melting the surfaces of the particles in a hot air current, the charge control agent is not coated and hence the charging ability thereof is not reduced, and thus the toner has sufficient tribo-charging ability for good image formation, excellent transfer efficiency, and excellent charge build-up performance and excellent charge stability upon continuous printing. In the case of an electrophotographic positively charged toner comprising a core toner that has a binder resin, a wax, a colorant and a charge control agent as principal component materials thereof and has been spherified through heat treatment, and at least fine silica particles as an external additive, the charge control agent is made to contain a resin having a quaternary ammonium salt group as a functional group and a nigrosine dye.

Disclosed are: a positive charge control agent which has good compatibility with a binder resin and good dispersibility, can prevent tinting, is excellent in charging properties, can reduce the content of a low-boiling-point organic compound and has no sensible odor; a method for production of the positive charge control agent; and an electrographic toner which is excellent in charging properties and coloring properties and is reduced in the formation of any VOC. The positive charge control agent comprises a copolymer prepared by copolymerizing a styrene monomer (M1), a (meth)acrylic acid alkyl ester monomer (M2) and a quaternary ammonium salt (M3) of a dialkylaminoalkyl (meth)acrylate monomer, wherein the copolymer has the following monomer ratio (mass %): (M1)+(M2):(M3) = 99.5:0.5 to 65:35, and at least one terminus of the copolymer is RCOO- or RO- (wherein R represents an alkyl group, an aryl group, an aralkyl group or an alicyclic group).

The invention provides a toner for electrostatic development and an image forming apparatus. The toner for electrostatic development may include toner base particles, resin fine particles added into the toner base particles, and hydrophobic silica. The resin fine particles may include a polymer having an isobornyl group-containing acrylate monomer. In the invention, the electrical property can bemaintained well, and the resin fine particles may be prevented from being attacted onto the surface of the light-sensitive body in the high-temperature and high-humidity environment.

The invention relates to a composition of black and white electrophoretic display liquid for electrophoretic display and a preparation method thereof; the black and white electrophoretic display liquid respectively adopts carbon black and titanium dioxide nanoparticles as black and white electrophoretic particles; the concentration of the particles in the black and white electrophoretic display liquid is respectively 3 percent to 20 percent and 10 percent to 50 percent, and the mass ratio of the black and white electrophoretic display liquid is 1:15 to 1:30; the dispersion media are Isopar series, the dispersing agents are fluorinated surfactant and polymer dispersant, and the used amount of the dispersing agents is 3 percent to 40 percent of the used amount of the electrophoretic particles. The preparation method of the black and white electrophoretic display liquid comprises the steps that: first, the black and white particles, the polymer dispersant and the dispersion media are respectively ball milled to prepare the black and white electrophoretic display liquid, are mixed by a certain ratio, and are added with the fluorinated surfactant, so that the black and white electrophoretic display liquid is prepared. The electrophoretic display liquid is prepared into a micro-cup device, the spacing of two polar plates is 0.1mm, 15V forward and backward alternating voltage is applied, the response of the electrophoretic display liquid is good, the contrast is above 23:1 and the highest contrast is 38:1, the black display response time is 831ms, and the white display response time is 1123ms.

The invention relates to a device for preparing a cement water reducing agent by a physical method. Flyash is taken as a raw material and moves in a friction charged pipeline to rub with the pipeline wall, coal particles in the flyash lose electrons and carry positive charge, decarburized coal ash obtains electrons with negative charge, most coal particles with the positive charge move to a negative high voltage electrode plate and most decarburized coal dust with negative charge moves to a positive high voltage electrode plate under the action of an electric field when passing through a highvoltage electrostatic separation cavity, and the flyash is separated into the coal particles, middlings (a mixture of the coal particles and the decarburized coal ash) and the decarburized coal ash for respective collection. The decarburized coal ash is the cement water reducing agent prepared by the device. The loss on ignition (LOI) of the water reducing agent is less than 5 percent and is higher than the requirement on first-grade products of China.

A positive electrified charge control agent comprises a silicon complex compound represented by the following chemical formula (1) (in the formula (1), [A]− is a sulfate anion). A positive electrified toner for developing an electrostatic image comprises the positive electrified charge control agent. A charge control method of the positive electrified toner for developing the electrostatic image comprises a step for making the toner positively electrified by friction.

The present invention discloses an image forming apparatus. The image forming apparatus includes: an image carrying member; a developing unit that develops an electrostatic latent image formed on the image carrying member using toner; a toner dispensing unit that dispenses the toner to the developing unit; and a toner dispense control unit that controls the toner dispensing unit in accordance with an operation speed of the developing unit or the image carrying member.

The invention provides a titanium dioxide external additive which is capable of being controlled stably, maintaining frictional charging amount, having less ambient variation, maintaining stable frictional charging performance, and which is free from abnormal images resulted from attachment of a toner to a photoreceptor that is generated while image developing and subjected to a surface modification treatment. The invention also provides an electrostatic charge images developing toner that is externally added with the external additive and an image forming method using the electrostatic charge images developing toner. The inventive external additive has the characteristic that particle surface of titanium dioxide having a water-soluble component of more than 0.2% is modified by the fluorosilane compound.

The invention discloses a charge regulator and a preparation method thereof, and carbon powder, solving the problems of poor compatibility of the traditional charge regulator and resin, poor dispersibility, lower charge number and complex preparation process. A coupling, complexing and cation exchange one-pot method is adopted, intermediates related in the steps directly carry out the next step reaction in the same pot without separation, thus the process is simplified, and a pyrazolone azoic compound iron complex charge regulator with excellent charge performance, no influence by environment, good compatibility with the resin and environment friendliness is obtained. The carbon powder prepared by the charge regulator can obtain a high-quality image which is not influenced by environment factors.

A latent electrostatic image developing toner of the present invention is mainly composed of two or more binder resins, a colorant, a releasing agent and a layered compound. A first binder resin of the binder resins is a polyester resin with an acid value of 15 KOHmg / g or less. The layered compound is a compound in which at least some interlayer ions are modified by organic ions. Toner particles are prepared by granulation in an aqueous medium, and the layered compounds are localized in the surface of the particles by the pelletization in the granulation. The average circularity of the particles is 0.970 or more.

Embodiments of the invention provide a developing agent and an image forming apparatus. The developing agent includes a toner particle containing a binder resin and a coloring agent, and additives added onto the surface of the toner particle. The additives contain a silica fine particle having an average circularity of 0.90 or more. In the additives existing on the surface of the toner particle, an existence ratio of an additive having a minor axis a of a primary particle diameter falling within the range of from 30 nm to 70 nm is 70% or more.

The present invention relates to a binder resin for toners for developing electrostatically charged images, such as electrophotography, xerography, and the like, and a toner for electrophotography containing the binder resin. Provided are a binder resin for toner excellent in low-temperature fixability, ink contamination resistance, and development durability, and an electrophotographic toner for electrostatic development containing the binder resin for toner. The binder resin for toner of the present invention and the toner using the same are excellent in low-temperature fixability, ink contamination resistance, and development durability. The toner binder resin is characterized in that it contains a polyester resin (A), a block composed of a chain of structural units derived from vinyl hydrocarbons and / or conjugated diene hydrocarbons, and styrene derived A block copolymer composed of blocks composed of chains of structural units, and / or a hydrogenated block copolymer (B) which is itself a hydrogenated product of the above-mentioned block copolymer.

The invention provides a toner and a preparation method thereof, and belongs to the technical field of toners. The preparation method of the toner comprises the steps of taking a styrene monomer and an acrylate monomer as solvents of polyester resin and isocyanate, reacting the polyester resin with the isocyanate to obtain a mixed solution containing polyurethane-modified polyester resin, emulsifying the mixed solution, performing polymerization by a seed emulsion to obtain a binder resin emulsion for the toner, and mixing the binder resin emulsion with a coloring agent, a releasing agent anda flocculating agent obtain the toner. The toner obtained by the preparation method has the advantages that the toner is of a core-shell structure in which the polyurethane-modified polyester resin istaken as a core and styrene-acrylic resin is taken as a shell, and can improve the durability of mechanical impact and effectively reduce the problems including agglomeration, clogging and the like of the toner caused by the impact in electronic equipment, thereby improving the storage stability during image output to achieve excellent low-temperature fixation and preservability of the toner.

The invention relates to an organic fluorosilicone emulsion release agent, which is prepared by the following steps: carrying out copolymerization on carboxyl alkyl silane, octamethylcyclotetrasiloxane and 1, 3, 5-tri (trifluoropropyl)-1, 3, 5-trimethylcyclotrisiloxane in a water-phase emulsion to synthesize a carboxyl alkyl / trifluoropropyl modified polysiloxane emulsion, and then carrying out cross-linking reaction on macromolecular trifluoropropyl hydrogen-containing polysiloxane. Under the action of a catalyst, the surface of a mold is coated with the fluorosilicone emulsion release agent, then curing is conducted at the temperature of 120-150 DEG C, the release agent can be cross-linked and cured on the surface of the mold to form a compact fluorosilicone coating, and due to the surface tendency, enrichment and hydrophobic and oleophobic effects of trifluoropropyl groups in the coating, the release agent has the good release effect on the surface of the mold. The coating can also endow a treated mold with a good demolding effect and easy stripping performance of a product, so that the mold treated by the mold release agent can enable a tire product to obtain a smooth and bright and clean appearance without adhesion or surface pollution under the condition that the demolding times n is less than or equal to 40-83.

The invention provides a magnetic color matching agent comprising a color matching agent masterbatch and an external additive, wherein the color matching agent masterbatch at least contains adhesive resin and magnetic particles, and the magnetic particles comprise hydrophobized nitrogen doped graphite flakes and magnetic iron oxide microparticles. The magnetic particles in the magnetic color matching agent are uniform in dispersion, stable in development when being used under the environments with high temperature and high pressure for a long term and high durable development performance; the obtained magnetic color matching agent is favorable in electrification performance and flowability, stable in electrification performance, capable of keeping high image concentration even and inhibiting fog if being used for a long term and favorable in image repeatability, and is not easily influenced by environment.

The present invention relates to a toner, an image forming method, an image forming apparatus, and a process cartridge. The toner includes: toner particles, each toner particle containing a toner base particle, wherein the toner contains a binder resin and a colorant, wherein the toner base particle has protrusions at a surface thereof, wherein an average of lengths of long sides of the protrusions is 0.1 [mu]m or more but less than 0.5 [mu]m, a standard deviation of the lengths of the long sides of the protrusions is 0.20 or less, and a coverage rate of the protrusions is 30% to 90%, wherein a resin forming the protrusions is prepared through polymerization of a monomer mixture containing at least a monomer having a sulfonic acid group, and wherein the monomer mixture contains styrene in an amount of 90% by mass or more and the monomer having a sulfonic acid group in an amount of 0.1% by mass to 5% by mass.