| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 430137150 | By polymerization | 39 |
| 20080199802 | TONER PROCESS - The present disclosure relates to a process for latex preparation comprising a first heating of a latomer mixture comprising at least one free radical polymerizable monomer to low conversion and then adding at least one alkylene anhydride; a second heating of the latomer mixture to low conversion; a third heating of the latomer mixture to form polymeric particles; and combining at least one amine with the polymeric particles. | 08-21-2008 |
| 20080241730 | PROCESS FOR PRODUCING TONER PARTICLES - In a process for producing toner particles through granulation by a wet process, a process for producing toner particles is provided that enables reduction of water content in wet toner particle cakes obtained by separating toner particles from a toner particle dispersion in a good efficiency, followed by washing, and enables efficient wash-away of impurities remaining on the toner particle surfaces so as to promise superior image characteristics. The toner particles are produced through a filtering step in which a slurry which contains toner particles is subjected to solid-liquid separation by means of a belt filter having a pressing aeration means which carries out aeration with pressing, to form wet toner particle cakes. | 10-02-2008 |
| 20090117487 | PRODUCTION METHOD OF STATIC CHARGE IMAGE DEVELOPING TONER AND SCREEN DEVICE - To provide a method for producing a toner for developing an electrostatic charge image, which is capable of producing toner host particles in good yield and which is excellent in image characteristics, image quality, scratch resistance of a developing device and toner consumption, and a screen device which is capable of screening continuously without clogging. | 05-07-2009 |
| 20090162780 | DRY TONER AND METHOD OF PREPARING SAME - A dry toner for developing an electrostatic image, including a toner binder containing a urea-modified polyester. The toner has an average sphericity of 0.96 or more and contains no more than 30% by weight of particles having a sphericity of less than 0.95. | 06-25-2009 |
| 20090191477 | Method For Producing Toner - Provided is a method for producing a toner including the steps of: preparing a resin liquid by mixing at least a binder resin made of polyester resin and a colorant with an ester organic solvent represented by the following general formula (1); dispersing the resin liquid in an aqueous medium to form an emulsion; and removing the ester organic solvent from the emulsion to produce a toner, in which the ester organic solvent before the preparation of the resin liquid contains water in an amount of not less than 1% by weight and up to the saturation solubility at 25° C. to the ester organic solvent. | 07-30-2009 |
| 20090280429 | POLYESTER SYNTHESIS - The present disclosure provides for enzymatic polymerization to produce polyester resins suitable for use in manufacturing toners. | 11-12-2009 |
| 20090280430 | Method for Manufacturing Toner - There is provided a method for manufacturing a toner capable of providing a toner having excellent low-temperature fixing property and anti-offset property by adjusting a molecular weight distribution of a polymerization toner to a narrow distribution range. The method is characterized in that a toner is polymerized using a reversible addition-fragmentation chain transfer polymerization (RAFT) method by adding a dithioacetate, xanthate or dithioester-based chain transfer agent in the polymerization of a toner. The method for manufacturing a toner comprises: dissolving a dispersant in water to prepare an aqueous dispersion solution; mixing a binder resin monomer, a charge control agent, a pigment, a wax and a dithioacetate, xanthate or dithioester-based chain transfer agent to prepare a monomer mixture; adding the monomer mixture to the aqueous dispersion solution and suspension-polymerizing the monomer mixture to form a toner composition; removing the dispersant from the toner composition; and drying the dispersant-free toner composition under a vacuum condition. | 11-12-2009 |
| 20100047708 | METHOD OF PRODUCING POLYMERIZED TONER - A method for producing a toner is provided. The method comprises the steps of (1) dispersing a water-soluble polyvinyl alcohol having a degree of polymerization of 1,500 to 2,500 and a degree of saponification of 75 to 98% in an aqueous medium to prepare an aqueous dispersion of the polyvinyl alcohol, (2) preparing a mixture of monomers, (3) mixing the aqueous dispersion with the monomer mixture, and (4) polymerizing the monomers. | 02-25-2010 |
| 20100190103 | METHOD OF PRODUCING POLYMERIZED TONER - Disclosed is a method for producing a polymerized toner. In the method, a mixture of colloidal silica as an aqueous dispersant and a polyvinylpyrrolidone is used during suspension polymerization. The amount of polyvinylpyrrolidone/colloidal silica aggregates having a diameter smaller than 100 nm is also limited to 1% by weight or less, based on the total weight of all aggregates. A polymerized toner produced by the method has a volume average particle diameter (dv) of 5 to 10 μm and a volume average particle diameter/number average particle diameter ratio (dv/dp) of 1.5 or less. The polymerized toner is consumed in a small amount during printing. According to the method, the formation of emulsion particles having a size smaller than 0.5 μm is inhibited. | 07-29-2010 |
| 20110008726 | PROCESS FOR PRODUCING TONER - Provided is a process for producing a toner comprising steps of: dispersing a polymerizable monomer composition containing a polymerizable monomer, a polar resin, a colorant, and a wax component in a aqueous dispersion medium to granulate the polymerizable monomer composition; and polymerizing the polymerizable monomer, wherein
| 01-13-2011 |
| 20110081611 | TONER MANUFACTURING METHOD - Disclosed is a toner manufacturing method, comprising: dispersing a polyester resin prepared by condensing a polyol and an unsaturated polycarboxylic acid into an aqueous medium and preparing a polyester resin particle dispersion liquid; adding a vinyl polymerizable monomer and a radical polymerization initiator to the polyester resin particle dispersion liquid to cause a radical polymerization reaction, followed by preparing a dispersion liquid of resin particles made of a resin in which vinyl polymerizable monomers react with the polyester resin; and mixing at least the resin particles made of the resin in which the vinyl polymerizable monomers react with the polyester resin, and a dispersion liquid of coloring agent particles, and forming toner particles by making the resin particles and the coloring agent particles cohere. | 04-07-2011 |
| 20110091806 | TONER MANUFACTURING METHOD - Disclosed is a toner manufacturing method, comprising: dispersing a polyester resin prepared by condensing a polyol and a polycarboxylic acid into an aqueous medium and adjusting a polyester resin particle dispersion liquid, wherein the polyol includes an unsaturated polyol, or the polycarboxylic acid includes an unsaturated polycarboxylic acid; and adding a radical polymerization initiator to the polyester resin particle dispersion liquid to cause a radical polymerization reaction, and adjusting the obtained dispersion liquid of polyester resin particles. | 04-21-2011 |
| 20110165511 | METHOD FOR PRODUCING TONER - A method for producing an electrostatic image developing toner by: a) adding a free radical polymerizable monomer to an aqueous medium comprising dispersed wax particles containing a colorant, b) polymerizing the free radical polymerizable monomer to yield a resin particle comprising the wax and colorant, and c) agglutinating and fusing the resin particle in the aqueous medium to yield a toner. The resultant toner exhibits uniform particle size, high roll viscosity resistance, and high durability. | 07-07-2011 |
| 20110183256 | METHOD OF MANUFACTURING TONER - A method of manufacturing a toner is provided which is excellent in low temperature fixation property, whose fixable temperature width is large, as well as excellent in durability while giving consideration to the global environment conservation. The method of manufacturing a toner includes a step of producing a polyester resin by a reaction of dicarboxylic acid and diol, and a step of producing a toner base particle having the polyester resin and a colorant. The dicarboxylic acid is a biomass monomer having carboxyl groups introduced into ends of one, or two or more monocarboxylic acids selected from pimaric acid, isopimaric acid, and sandaracopimaric acid. | 07-28-2011 |
| 20110305989 | METHOD OF PRODUCING TONER - A method of stably producing a toner is provided. This method provides a long-term stabilization of material dispersion in a colorant-dispersed solution and inhibits segregation of the material and provides a more microfine and more uniform dispersion of the colorant in the toner, and moreover produces a toner that has a sharp toner particle diameter distribution. This method of producing toner has at least a colorant dispersion step of obtaining a colorant-dispersed solution by dispersing a pigment-containing colorant in a liquid mixture that contains the colorant and a dissolved resin solution or a polymerizable monomer, wherein the liquid mixture contains a nonionic surfactant and the nonionic surfactant has at least an oxyalkylene group and has a hydrophile-lipophile balance value (HLB value) of 9.0 or more and 17.0 or less. | 12-15-2011 |
| 20120021353 | METHOD FOR PRODUCING TONER - Disclosed is a method for producing toner, comprising (1) mixing, with an aqueous medium, a resin solution of an organic solvent in which amorphous polyester resin having unsaturated dicarboxylic acid monomer units is dissolved, and forming an amorphous polyester resin particle dispersion; (2) adding a radical polymerization initiator to the amorphous polyester resin particle dispersion obtained in (1), cross-linking the amorphous polyester resin, and forming a cross-linked amorphous polyester resin particle dispersion; and (3) mixing at least the cross-linked amorphous polyester resin particle dispersion obtained in (2), with a crystalline polyester resin particle dispersion, aggregating cross-linked amorphous polyester resin particles and crystalline polyester resin particles, and forming toner particles. | 01-26-2012 |
| 20120082931 | PRODUCING METHOD OF TONER - Disclosed is a producing method of a decolorizable toner, comprising dispersing a mixed composition containing encapsulated colorant particles which are particles containing a color developable compound and a color developing agent and coated with an outer shell, a polymerizable monomer, and a release agent in an aqueous medium, and subjecting the polymerizable monomer to suspension polymerization in the aqueous medium. | 04-05-2012 |
| 20120129094 | TONER - A toner prepared by a method comprising granulating while polymerizing a ring-opening polymerizable monomer with a catalyst under the presence of a surfactant and a colorant in a compressible fluid. | 05-24-2012 |
| 20120164571 | POLYMERIZED TONER HAVING HIGH RESOLUTION - A polymerized toner is provided. The polymerized toner comprises a reactive anionic surfactant having at least one reactive functional group. The reactive anionic surfactant is added simultaneously with a dispersant to prepare an aqueous dispersion or is added within 2 hour after a polymerization reaction of a monomer mixture is initiated in an aqueous dispersion. This simultaneous or rapid addition allows the reactive anionic surfactant to be dispersed on the surface of the toner particles. The reactive anionic surfactant is located over the entire surface of the toner particles to increase the surface charge density of the toner, achieving good charge stability and excellent imaging characteristics. | 06-28-2012 |
| 20140072912 | METHODS FOR RECYCLING BYPRODUCT OF POLYESTER RESIN PRODUCTION - Processes for preparing polyester resins as toner production components. The processes include reacting an organic diol and a cyclic alkylene carbonate to produce carbon dioxide (CO | 03-13-2014 |
| 20140302437 | METHOD FOR PRODUCING TONER PARTICLES - A method for producing toner particles that contain a binder resin having a styrene-acrylic resin as a main component, a colorant, and a block polymer that has polyester segments and vinyl polymer segments, has a step of producing resin particles in accordance with a suspension polymerization method or a dissolution suspension method, and thereafter, holding the temperature of the aqueous medium in which the resin particles are dispersed, for 60 minutes or more, between a glass transition point TgA (° C.) of the resin particles and an onset temperature TmA (° C.) of an endothermic peak derived from the block polymer in the resin particles, in such a manner that a temperature fluctuation rate not greater than 0.35° C./minute, and a temperature fluctuation range is not greater than 20° C. | 10-09-2014 |
| 20140342286 | TONER - A toner prepared by a method comprising granulating while polymerizing a ring-opening polymerizable monomer with a catalyst under the presence of a surfactant and a colorant in a compressible fluid. | 11-20-2014 |
| 20140363765 | METHOD FOR PRODUCING TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT - A method for producing a toner for electrostatic image development, including the steps of (1) polycondensing an alcohol component, a carboxylic acid component, and polyethylene terephthalate to provide an amorphous polyester; and (2) subjecting the amorphous polyester obtained in the step (1) and components containing a crystalline polyester in an amount of from 0.3 to 2.5 times the mass of the components derived from the polyethylene terephthalate in the amorphous polyester to a process for producing a toner. The toner for electrostatic image development obtained by the method of the present invention is suitably used in development or the like of latent images formed in, for example, an electrophotographic method, an electrostatic recording method, an electrostatic printing method, or the like. | 12-11-2014 |
| 20150024324 | TONERS FOR ELECTROSTATIC-IMAGE DEVELOPMENT - To provide an emulsion polymerized agglomerated toner for electrostatic charge image which is excellent in the fixing property even at a high temperature without deteriorating other properties and which does not emit an odor offensive to people, and a process for its production. | 01-22-2015 |
| 20150099227 | RESIN FOR TONER AND TONER - The present invention provides a crystalline polyester resin for toner that has, when used as a resin for toner, a sharp melt property, excellent fixing performance and blocking property and a preferable charging performance. Provided is a crystalline polyester resin for toner, which is obtained by condensation polymerization of a dicarboxylic acid component containing at least one compound selected from the group consisting of terephthalic acid, 2,6-naphthalenedicarboxylic acid and derivatives thereof, and a diol component containing at least one compound selected from the group consisting of 2-methyl-1,3-propanediol, 2,2-dimethyl-1,3-propanediol and derivatives thereof, the crystalline polyester resin having a weight-average molecular weight of not less than 5000 and not more than 50000. | 04-09-2015 |
| 20150370185 | METHOD FOR PRODUCING A POLYMERIZED TONER - Disclosed is a method for producing a polymerized toner, wherein the method comprises: a suspension step of obtaining a suspension in which droplets of a first-stage polymerizable monomer composition containing at least a first-stage polymerizable monomer and a colorant are dispersed, by suspending the first-stage polymerizable monomer composition in an aqueous dispersion medium containing a dispersion stabilizer; a first-stage polymerization step of carrying out suspension polymerization by using the suspension, in the presence of a polymerization initiator; and a second-stage polymerization step of carrying out suspension polymerization by further adding a second-stage polymerizable monomer satisfying the following formula (1), when a polymerization conversion rate in the first-stage polymerization step becomes 20 to 80%: | 12-24-2015 |
| 20160026101 | METHOD FOR PRODUCING RESIN PARTICLE DISPERSION, AND METHOD FOR PRODUCING TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT USE - The present invention relates to a process for producing a resin particle dispersion, including a step (1) of mixing a polyester resin and a basic aqueous solution to obtain a resin neutralized product; and a step (2) of adding an aqueous medium to the resin neutralized product obtained in the step (1) to emulsify the resin neutralized product, in which a concentration of an ester group in the polyester resin is from 6.3 to 12 mmol/g, a pH of the basic aqueous solution as measured at 25° C. is from 8.5 to 13.5, and a content of an organic solvent in the resin neutralized product is not more than 10% by mass; and a process for producing a toner for development of electrostatic images, including steps of aggregating and coalescing the resin particles in the obtained resin particle dispersion. The present invention provides a process for producing a dispersion of resin particles having a small particle size and a narrow particle size distribution, and a process for producing a toner that has a narrow particle size distribution and is excellent in dot reproducibility and charge stability. | 01-28-2016 |
| 430137160 | Chemical after treating of polymer | 4 |
| 20100248132 | PRODUCTION PROCESS OF POLYMERIZED TONER - A production process of a polymerized toner composed of polymer particles, including a step of polymerizing a polymerizable monomer composition containing a colorant and a polymerizable monomer in the presence of a polymerization initiator in an aqueous dispersion medium, wherein, in a stripping treatment step, the dispersion containing the polymer particles is introduced into an evaporator to conduct the stripping treatment by a method, in which a gas is blown into the dispersion within the evaporator to discharge volatile organic components including an unreacted polymerizable monomer out of the evaporator concomitantly with the gas, and both inert gas and saturated steam are used as the gas blown into the dispersion. | 09-30-2010 |
| 20110086308 | TONER, VESSEL WITH THE TONER, DEVELOPER, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE AND IMAGE FORMING METHOD - Toner and a developer which are excellent in cleaning property and fixing property at low temperature, and capable of forming images with high quality are provided, along with a method for their production. A toner producing method involves dispersing and/or emulsifying an oil phase or a monomer phase containing a toner composition and/or a toner composition precursor in a water-based medium to granulate, | 04-14-2011 |
| 20110256480 | TONER - An object of the present invention is to provide a toner which allows fixation at low temperatures, which is excellent in anti-offset ability, and which provides a high quality image at high and low humidities in a stable manner without causing any image defect over time. Provided is a toner, containing at least a binder resin and a colorant in which: the binder resin in the toner contains 60% by mass or more of a styrene/acryl resin and a THF-insoluble fraction A which is an extraction residue obtained by carrying out Soxhlet extraction with tetrahydrofuran (THF) for 16 hours; the THF-insoluble fraction A contains a TOL-insoluble fraction B which is an extraction residue obtained by carrying out Soxhlet extraction with toluene (TOL) for 16 hours; and a mass ratio (B/A) between the THF-insoluble fraction A and the TOL-insoluble fraction B is in the range of 0.1≦B/A≦0.5. | 10-20-2011 |
| 20120308926 | TONER AND TONER BINDER - A polyester resin toner binder which gives a toner with good anti-blocking property at high temperature and high humidity and good low-temperature fixing ability. The present invention is directed to a toner binder for developing electrostatic charge images, which binder comprises a condensation-polymerization polyester resin, the polyester resin being a product formed in the presence of a catalyst (a) represented by the following general formula (I): | 12-06-2012 |
| 430137170 | Two-phase polymerization (e.g., oil-water) | 8 |
| 20090004594 | METHOD FOR PRODUCING TONER FOR DEVOLOPING ELECTROSTATIC IMAGE - Provided is a method for producing a toner for developing electrostatic image which inhibits the generation of small diameter microparticles as a by-product in the polymerization for the toner, which includes easy or simple washing treatment (washing/filtration/dehydration), and which is excellent in productivity. | 01-01-2009 |
| 20090023092 | TONER FOR DEVELOPING ELECTROSTATIC IMAGE, METHOD FOR PRODUCING THE SAME, DEVELOPER, IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING METHOD - A toner is disclosed, for developing electrostatic images by means of image forming apparatuses, that comprises toner particles, and an external additive, wherein the toner particles comprise a binder resin and a colorant, the external additive is introduced onto the surface of the toner particles, the external additive liberates from the surface of the toner particles in a rate of 7% to 50% under the condition that the toner is dispersed within a surfactant-containing electrolyte at 20 W output power and 20 kHz frequency for one minute by means of an ultrasonic homogenizer. | 01-22-2009 |
| 20090081576 | Toner compositions - The present disclosure provides processes for reducing the particle size of latex resins and toners produced with such resins. In embodiments, a carboxylic acid may be added to materials utilized to produce a latex in forming a seed resin or a master batch which, in turn, may be utilized to form latex resins and toner particles. In accordance with the present disclosure, one may be able to utilize materials for the production of latex resins and toners which may otherwise produce particles that are too large in the absence of the carboxylic acid. | 03-26-2009 |
| 20090142692 | LOW MOLECULAR WEIGHT LATEX AND TONER COMPOSITIONS COMPRISING THE SAME - Provided are a latex process and a toner process, both of which include the preparation of a latex having weight average molecular weight of from about 12×10 | 06-04-2009 |
| 20090263740 | TONER COMPOSITIONS - The present disclosure provides processes for reducing the particle size of latex resins and toners produced with such resins. In embodiments, a gel latex may be formed as a seed particle and then utilized to form latex resins and toner particles. In accordance with the present disclosure, one may be able to utilize materials for the production of latex resins and toners which may otherwise produce particles that are too large in the absence of the gel latex. | 10-22-2009 |
| 20100075247 | METHOD AND PREPARATION OF CHEMICALLY PREPARED TONERS - A method of making polymeric particles having a controlled size and size distribution, and in particular a method for the preparation of chemically prepared toners, via evaporative limited coalescence process, wherein basic silicate salts are employed to remove particulate stabilizer from precipitated polymer particles. The process includes the steps of dispersing polymeric binder materials and optional additives in an organic solvent to form an organic phase. The organic phase is dispersed by high shear agitation in an aqueous phase containing a particulate stabilizer, e.g. colloidal silica, to form a dispersion of small droplets of the organic phase in the aqueous phase. The dispersion is homogenized and the organic solvent is removed from the dispersed particles in the dispersion by evaporation, and polymeric particles are precipitated with particulate stabilizer on the surface thereof, which are then recovered, treated with a basic silicate salt to remove particulate stabilizer, and washed and dried. | 03-25-2010 |
| 20120064454 | PRODUCING METHOD OF TONER FOR DEVELOPING STATIC IMAGE - A method of producing a toner comprising toner particles containing a binder resin composed of a non-crystalline polyester resin having a crosslinking structure and a crystalline polyester resin is disclosed, the method comparing steps of;
| 03-15-2012 |
| 20160018750 | METHOD FOR PREPARING SUSPENSION POLYMERIZATION TONER OF CORE-SHELL STRUCTURE - A method for preparing suspension polymerization toner of core-shell structure comprises following steps: 1) preparing a monomer oil phase containing a certain amount of polar resin forming toner soft core resin and aqueous dispersion liquid respectively; 2) adding the monomer oil phase into the aqueous dispersion liquid, transferring a mixture into a reactor after high-speed shearing and suspension granulation, and carrying out a first heating polymerization reaction to obtain toner particles of soft-core hard-shell structure; 3) taking the toner particles of soft-core hard-shell structure as a core layer, adding a cationic monomer component, and carrying out a second polymerization reaction through a water-soluble initiator to obtain the toner particles of soft-core hard-shell structure with dense charge surface layers uniformly distributed on outer surfaces; and 4) cleaning, filtering, and sufficiently drying a preceding product, and then adding silicon dioxide. | 01-21-2016 |
