Class / Patent application number | Description | Number of patent applications / Date published |
430108800 | Hydrocarbon wax-containing adjuvant | 30 |
20080220357 | TONER FOR DEVELOPING ELECTROSTATIC IMAGE, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE USING THE TONER - A toner including a binder resin including a polyester resin and a vinyl resin; a wax; and a colorant, wherein the vinyl resin includes a unit obtained from a radically polymerizable monomer having an alkyloxysilyl group. An image forming apparatus including an image bearing member configured to bear an electrostatic image thereon; a developing device configured to develop the electrostatic image with a developer including the toner to form a toner image on the image bearing member; and a transfer device configured to transfer the toner image onto a receiving material. A process cartridge including an image bearing member; and a developing device configured to develop an electrostatic image on the image bearing member with a developer including the toner, wherein the process cartridge is detachably attached to an image forming apparatus as a unit. | 09-11-2008 |
20080233506 | TONER, AND OILLESS FIXING METHOD AND PROCESS CARTRIDGE USING THE TONER - A toner useful for an oilless fixing method, includes a binder resin; a colorant; and 2.0 to 4.5% by weight of a wax which is soluble in n-hexane, based on a total weight of the toner, wherein the wax is dispersed in the toner, the wax forming wax domain particles (DA) comprising wax domain particles (DS) exposed at a surface of the toner and wax domain particles (DI) encapsulated in the toner and not exposed at the surface of the toner, wherein a weight of the DS is greater than a weight of the DI, wherein the toner from which the DS have been eluted with n-hexane comprises vestigial concavities having an area of 0.01 πμm | 09-25-2008 |
20080261140 | Electrophotographic developing agent - An electrophotographic developing agent is provided that includes a binder resin, a releasing agent, a colorant, and a charge control agent. By using a binder resin having a high acid value and a mixture of two waxes having different melting points as a releasing agent, a electrophotographic developing agent is obtained, which has excellent fusing property and durability and does not result in hot offset and wrap jamming. | 10-23-2008 |
20090004589 | Toner and Process for Producing the Same - The present invention provides toner containing core particles prepared by mixing and aggregating in an aqueous medium at least a first resin particle dispersion in which first resin particles are dispersed, a colorant particle dispersion in which particles of colorant are dispersed and a wax particle dispersion in which particles of wax are dispersed. The colorant contains carbon black having a DBP oil absorption of 45 to 70 (ml/100 g) and the wax contains a wax having an endothermic peak temperature (referred to as melting point Tmw1 (° C.)) according the DSC method of 50 to 90° C. It is thus possible to prepare toner that has a small particle size and a sharp particle size distribution without requiring a classification process and that can prevent transfer void and toner scattering during transfer and obtain high transfer efficiency. The present invention provides also a method for producing the toner. | 01-01-2009 |
20090017391 | TONER, METHOD FOR MANUFACTURING THE TONER, AND PROCESS CARTRIDGE USING THE TONER - A toner including a colorant, a polyester (I), and an urea-modified polyester is provided. The urea-modified polyester is a reaction product of an isocyanate-modified polyester with an amine. The isocyanate-modified polyester is obtained by modifying a polyester (II) with an isocyanate. The polyester (II) has specific number average molecular weight (Mn) and hydroxyl value [OHV]. The toner can be manufactured by dispersing or emulsifying a toner constituent liquid including the colorant, the polyester (I), and the isocyanate-modified polyester, in an aqueous medium. The toner can be used for a one-component developing device. | 01-15-2009 |
20090017392 | TONER, DEVELOPER AND IMAGE FORMING APPARATUS - A toner composition including toner particles including at least a binder resin; and a colorant, wherein the toner composition satisfies at least one of the following relationships (1) and (2): | 01-15-2009 |
20090053640 | TONER AND METHOD FOR PRODUCING TONER - A toner is obtained in an aqueous medium by dispersing second resin particles into a core particles dispersion including at least first resin particles, and fusing the second resin particles with core particles. A second resin particle dispersion in which the second resin particles are dispersed is added after adjusting the pH value in the range of HS+2 to HS−5, where HS represents the pH value of the core particle dispersion in which the core particles are dispersed, so that toner particles have a volume-average particle size of 3 to 7 μm, a content of the toner particles having a particle size of 2.52 to 4 μm in a number distribution is 10 to 75% by number, the toner particles having a particle size of 4 to 6.06 μm in a volume distribution is 25 to 75% by volume, and the toner particles having a particle size of not less than 8 μm in the volume distribution is not more than 5% by volume. Thus, the toner can have a smaller particle size and a sharp particle size distribution without requiring a classification process. Moreover, the toner or a two-component developer can achieve a longer life and suppress transfer voids or scattering during transfer. | 02-26-2009 |
20090087768 | Non-Magnetic Toner - An object of the present invention is to provide a toner excellent in fixing ability and developing ability. Provided is a non-magnetic toner including: toner particles each containing at least a binder resin, a colorant, and a wax component; and an inorganic fine powder, wherein: the toner has a specific storage elastic modulus at each of 110 C and 150 C; when a temperature at which a differential curve of a temperature and the common logarithm LogG′ of a storage elastic modulus G′ shows the minimum value in the temperature region of 60 to 130 C is denoted by T0, a straight line having the largest gradient out of straight lines each connecting points on the differential curve at temperatures of T0+a and (T0+a)+1 (C) [where a represents an integer of 0 to 9] is denoted by A, a straight line having the smallest gradient out of straight lines each connecting points on the differential curve at temperatures of T0+b (C) and (T0+b)+10 (C) [where b represents an integer of 0 or more] is denoted by B, and a straight line having the largest gradient out of straight lines each connecting points on the differential curve at temperatures of T0+c and (T0+c)+10 (C) [where c represents an integer larger than “a value b when a straight line B is given”] is denoted by C, the relationship of 1C ? ¢TA (from T0 to the point of intersection of the straight lines A and B) ? 20 C and the relationship of 100 C ? T | 04-02-2009 |
20090155704 | TONER COMPOSITION - The present invention is a toner that includes a polymeric binder and a polyethylene wax or ester wax. A dispersing agent of poly(ethylene vinyl acetate) is included in the toner that dispersed the wax and reduces the amount of free wax particles. | 06-18-2009 |
20090155705 | Release Agent Formulation for Chemically Prepared Toner - A method for producing toner, and a toner composition, which includes polymer binder and a release agent composition that has relatively high viscosity and associated melting characteristics that improve filming resistance and/or fusing performance. The toner may be prepared by a chemical process wherein the toner particles may be grown in an aqueous solution to obtain a desired toner particle size. | 06-18-2009 |
20090239170 | METHOD FOR PRODUCING TONER, AND TONER - A method for producing a toner, the method including discharging a toner composition liquid from a plurality of nozzles to form liquid droplets thereof, the toner composition liquid being prepared by dissolving or dispersing in a solvent a toner composition containing at least a binder resin, a colorant, an acid-modified hydrocarbon wax and an unmodified hydrocarbon wax, the waxes serving as a releasing agent, and solidifying the liquid droplets so as to form solid particles. | 09-24-2009 |
20090280425 | Black Toner Formulations - Black toner formulations for electrophotography. The black toner formulations include an optimum concentration of one or more black colorants. Further, the black toner formulation includes either a polymeric dispersant, a binder, a wax, or combinations thereof. The one or more black colorants exhibit a low absorption in near infrared spectrum ranging from a wavelength of about 700 nanometers (nm) to a wavelength of about 1100 nm. Moreover, the black toner formulations exhibit a bulk toner powder reflectivity of greater than about 8 percent and less than about 60 percent, at a wavelength of about 940 nm, for toner particles having sizes ranging from about 5.5 to about 10 microns. | 11-12-2009 |
20100167194 | ELECTROPHOTOGRAPHIC TONER AND METHOD OF PREPARING THE SAME - The disclosure provides electrophotographic toner and a method of preparing the same. The toner includes a latex, a colorant, and a releasing agent, wherein the toner has a weight-average molecular weight of about 50,000 to about 80,000; a complex viscosity of about 1×10 | 07-01-2010 |
20110129773 | TONER, DEVELOPER, DEVELOPER CONTAINER, METHOD OF MANUFACTURING TONER, AND IMAGE FORMING METHOD - A toner including a binder resin comprising a modified polyester having an ester bond and a chemical bond other than the ester bond, and a crystalline polyester; and a release agent comprising a microcrystalline wax comprising a hydrocarbon having 20 to 80 carbon atoms which comprises 55 to 70% by weight of a linear hydrocarbon. The microcrystalline wax has an acid value of from 0.1 to 20 mgKOH/g and a melting point of from 65 to 90° C. The melting point is a temperature at which a local maximum endothermic peak is observed in a differential thermal curve measured by differential scanning calorimetry (DSC). The release agent is dispersed in the toner with a dispersion diameter of from 0.06 to 1.50 μm. | 06-02-2011 |
20110136055 | TONER - A toner having good dispersibility of a pigment and a release agent therein and having excellent low temperature fixability is provided. The toner includes a binder resin, a pigment and a release agent, and the binder resin includes a graft polymer in which abietic acids and an unsaturated fatty acid are grafted to a vinyl resin. An image is formed using such a toner. | 06-09-2011 |
20110151368 | ELECTROPHOTOGRAPHIC TONER AND METHOD OF PREPARING THE SAME - An electrophotographic toner including a binder, a colorant and a releasing agent, and a method of preparing the electrophotographic toner. | 06-23-2011 |
20110151369 | TONER - Toner having good dispersibility of a pigment and a release agent therein and having excellent low temperature fixability is provided. The toner includes a binder resin, a pigment and a release agent, and the binder resin includes a graft polymer in which abietic acids and a fatty acid are grafted to a polyfunctional epoxy resin. Image is formed using such a toner. | 06-23-2011 |
20110200929 | ELECTROSTATIC IMAGE DEVELOPING TONER AND TWO-COMPONENT DEVELOPER - The present invention provides an electrostatic image developing toner capable of improving the dispersibility of wax in the toner and superior in offset resistance and in storageability (heat-resistant storageability) at high temperatures, and a two-component developer which uses this electrostatic image developing toner. The electrostatic image developing toner includes: a binder resin, a colorant, and a release agent, wherein the binder resin contains a polyester resin, and a block copolymer which has a polyolefin backbone unit. | 08-18-2011 |
20110223530 | TONER, DEVELOPER, IMAGE FORMING METHOD, IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND TONER CONTAINER - A toner is provided including a binder resin and a wax having primarily C—H and C—C bonds, and having a melting point of 50 to 90° C., wherein the wax is present in a surface portion of the toner in an amount of from 0.1 to 4.0% by weight, wherein the amount of the wax is determined by Fourier transform infrared spectroscopy attenuated total reflectance (FTIR-ATR); and the use of the toner in an image forming method, image forming apparatus, developer and toner cartridge containing the toner. | 09-15-2011 |
20110294058 | TONER - A toner containing a wax, wherein the wax has a mass decrease at 165° C. of 10% by mass or less, a molecular chain consisting of C—H bonds and C—C bonds, and a penetration of 5 mm to 25 mm, wherein a product of a ½ method softening point (° C.) of the toner and an amount of the wax on a surface of the toner is 8 to 20, and wherein the toner is obtained by a method including emulsifying or dispersing in an aqueous medium a toner material liquid, which is a liquid containing a toner material, which contains the wax. | 12-01-2011 |
20120264043 | ELECTROSTATIC IMAGE DEVELOPING TONER - An electrostatic image developing toner including: a binder resin; a colorant; and a wax, wherein the intensity ratio of an absorbance at 2,850 cm | 10-18-2012 |
20130029260 | TONER, DEVELOPER AND METHOD FOR PRODUCING TONER - A toner including: a core particle; and fine resin particles, the core particle containing at least a binder resin, a releasing agent and a colorant, wherein the toner is in shape of particles, and each toner particle has a sea-island structure having the core particle and island portions, which are convex portions formed from the fine resin particles on surface of the core particle, wherein the binder resin contains first and second resins, and the fine resin particles are made of third resin, wherein the first resin is crystalline resin, and the second and third resins are non-crystalline resin, wherein the second resin has glass transition temperature (Tg2) and the crystalline resin has melting point (Tc1) where Tg2 is higher than Tc1, and wherein the third resin has glass transition temperature (Tg3) and the toner has glass transition temperature (Tgt) wherein Tg3 is higher than Tgt. | 01-31-2013 |
20130143153 | TRANSPARENT ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - A transparent electrostatic charge image developing toner satisfies the relationships of the following Formulas (1), (2), and (3) wherein Dt (μm) is a volume average particle diameter, upper GSDv is an upper volume particle size distribution index, and lower GSDp is a lower number particle size distribution index: Formula (1): 18≦Dt≦30; Formula (2): 1.05≦upper GSDv≦1.20; and Formula (3): 1.29≦lower GSDp≦1.50. | 06-06-2013 |
20130244164 | TONER - A toner having toner particles, each of which contains a binder resin, a wax and inorganic fine particles, wherein the inorganic fine particles are fixed at the surface of the toner particles as a result of a surface treatment by hot air, and the degree of uneven distribution of wax in the toner is controlled in a depth direction of the toner, from the toner surface towards a toner central portion. | 09-19-2013 |
20130252163 | TONER - Provided is a toner capable of suppressing the bleeding of wax to the surface of the toner to maintain a high electrophotograph property while maintaining a broad fixing temperature range and capable of reducing interior contamination in long-term use. The toner includes toner particles, each of which contains a binder resin, a colorant, and a wax. The toner has a softening point of 75° C. or more and 110° C. or less measured by a constant-pressure-extrusion-type capillary rheometer. The wax is a hydrocarbon wax composed of a hydrocarbon compound. The hydrocarbon wax has specific abundance ratios each corresponding to a specific carbon number range of hydrocarbon compounds. | 09-26-2013 |
20140113228 | TONER, TWO-COMPONENT DEVELOPER, AND IMAGE FORMING METHOD - A toner has a weight-average particle diameter (D4) of 3.0 μm or more and 8.0 μm or less, wherein the average circularity analyzed by dividing particles of the toner having an equivalent circle diameter of 1.98 μm or more and less than 200.00 μm into 800 in a range of a circularity of 0.200 or more and 1.000 or less is 0.960 or more and 0.985 or less, the proportion of particles A having a circularity of 0.990 or more and 1.000 or less is 25.0% or less on a basis of the number of particles, and the ratio of particles B having an equivalent circle diameter of 0.50 μm or more and less than 1.98 μm to the total particles having an equivalent circle diameter of 0.50 μm or more and less than 200.00 μm is 10.0% or less on a basis of the number of particles. | 04-24-2014 |
20160097985 | ELECTROSTATIC IMAGE DEVELOPING TONER - The present invention provides an electrostatic image developing toner containing a binder resin, a colorant and a wax, wherein at least one specific peak or shoulder attributable to a melting point of the wax is present at 55 to 90° C., a dust emission (Dt) of said electrostatic image developing toner satisfies the specific formula, another specific peak or shoulder relating to an endothermic quantity is present at 65.6 to 70.8° C., and an average value of tan δ in a range of an angular velocity of 20 to 100 rad/sec in a dynamic viscoelasticity measurement at 140° C. is from 1.62 to 2.20. | 04-07-2016 |
20160124334 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE - An electrostatic charge image developing toner includes a toner particle that has a sea-island structure including a sea portion containing a binder resin and an island portion containing a release agent and having at least two maximum values of distribution of a degree of uneven distribution B of the island portion shown by the following Equation (1): | 05-05-2016 |
20160139523 | TONER - A toner having toner particles, each of which contains a binder resin, a wax and inorganic fine particles, wherein the inorganic fine particles are fixed at the surface of the toner particles as a result of a surface treatment by hot air, and the degree of uneven distribution of wax in the toner is controlled in a depth direction of the toner, from the toner surface towards a toner central portion. | 05-19-2016 |
20160195825 | CARBOXYLIC ACID OR ACID SALT FUNCTIONALIZED POLYESTER POLYMERS | 07-07-2016 |