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Inventor: Kenji Hayashi


Address: Hachioji, JP
No. of patents: 16
Last patent issue date: 08/21/2012

NumberTitleIssue Date
8247145Magenta toner for developing electrostatic image
A magenta toner for developing an electrostatic image, the magenta toner comprising at least a binder resin and a magenta colorant, wherein the magenta colorant comprises a compound represented by Formula (1), wherein D is represented by one of Formulas (2) to (4):
08/21/2012
8092964Toner
Disclosed is a toner comprising a resin and a colorant, wherein the colorant comprises a compound represented by formula (I) and a compound represented by formula (II). ...
01/10/2012
8053153Toner for developing electrostatic latent image
An electrophotographic toner containing a resin and a colorant is disclosed. The colorant is represented by the formula in the formula, M1 is a silicon atom (Si), a germanium atom (Ge) and a tin atom (Sn); Z is i...
11/08/2011
8034520Magenta toner for developing electrostatic image
Disclosed is a magenta toner, which contains magenta colorants composed of compound A represented by Formulas (1), (2) or (3) in an amount of mA and compound B selected from a group consisting of a mono-azo pigment, a naphthol pigment and rhodamine chelate pigment i...
10/11/2011
7862974Toner for electrophotography
An embodiment may be an electrophotographic toner which comprises at least one toner particle which comprises an inner layer and an outer layer covering the inner layer, wherein a cross-sectional area ratio of the outer layer to the inner layer is 0.05-0.46, and whe...
01/04/2011
7807327Method for producing electrophotographic toner
A method for producing an electrophotographic toner comprising the step of polymerizing two or more polymerizable monomers under existence of a non-polar liquid hydrocarbon, wherein at least one of the polymerizable monomers comprises a polar group; a kinematic visc...
10/05/2010
7682769Method of manufacturing toner, toner, and image forming method
Disclosed is a method of manufacturing toner possessing the steps of conducting a polymerization process for acquiring wax-containing polyester resin particles via condensation-polymerization of carboxylic acid and alcohol employing oil droplets after forming the oi...
03/23/2010
7682767Method of manufacturing toner, toner, and image forming method
Provided can be easily producible toner containing polyester resin particles, exhibiting excellent fixability and fine line reproduction, in which high quality images can stably be formed for a long duration, the toner manufacturing method, and the image forming met...
03/23/2010
7642030Toner, manufacturing method thereof and image forming method
A toner including toner particles each containing a resin and a colorant, wherein the toner particle has: a region A which contains the colorant and a region B through which more electrons can pass than the region A; and the region A is cov...
01/05/2010
7541129Electrostatic image developing toner
An electrostatic image developing toner comprising a binder resin and a colorant, wherein the toner contains a mixture of: (i) a compound represented by Formula (3); and (ii) a compound represented by Formula (1) and/or (2), wherein R1 to R8 ea...
06/02/2009
7524601Toner and method of manufacturing the toner
A toner is disclosed, comprising a resin (A), a colorant (B) and an alkylidenecarboxylic acid (C). ...
04/28/2009
7507516Toner and method of manufacturing toner
Disclosed is a method of manufacturing toner comprising the steps of adding oil-droplets containing a radically polymerizable monomer into an associated particle dispersion formed by association-fusing resin particles and colorant particles, and forming a shell by c...
03/24/2009
7491481Method of manufacturing toner, toner, and image forming method
A method of manufacturing a toner comprising the steps of: (i) forming oil droplets in an aqueous medium comprising a surfactant having a long chain hydrocarbon group and an acid group, the oil droplets comprising: (i-a) a polycarboxylic acid having two or more carb...
02/17/2009
7470496Electrostatic image developing toner
An electrostatic image developing toner comprising a binder resin and a colorant, wherein the toner comprises a compound represented by the following Formula (1): wherein, R1, R2, R3 and R
12/30/2008
7445878Electrostatic charge image developing toner
A toner for developing an electrostatic charge image comprising a compound represented by a following formula (1): wherein X represents H or —CO—R4; R4 represents an alkyl group having 1 to 4 carbo...
11/04/2008
7186492Toner for electrostatic charge image development and image forming method
A toner includes at least a crystalline compound, a binding resin and coloring agent, wherein a differential heat quantity curve measured by a differential scanning calorimeter (DSC) has a clear endothermic peak at 50 to 100° C. in a first temperature rising proces...
03/06/2007
 
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