Dry Toner Having Chemically Identified Binder Patents (Class 430/109.1)
  • Patent number: 10437164
    Abstract: A toner for developing an electrostatic image including a binder resin, a coloring agent, and a releasing agent are provided. A particle of the toner satisfies conditions of Equation (1) (W(L)/T(L)?0.1 and Equation (2) 15<Nstain, where Nstain refers to a number of stained releasing agent domains when the particle of the toner is stained with ruthenium tetraoxide (RuO4) and a cross section of the particle of the toner is observed, W(L) refers to a longest length of lengths of the stained releasing agent domains, and T(L) refers to a longest length of the cross section of the particles of the toner.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: October 8, 2019
    Assignee: HP PRINTING KOREA CO., LTD.
    Inventors: Jin-mo Hong, Young-jae Kwon, Hwoing-woon Lee
  • Patent number: 10203622
    Abstract: Toner particles contain a non-crystalline polyester resin, a crystalline polyester resin, a styrene-acrylic acid-based resin, and a releasing agent. An amount of the releasing agent contained in the toner is at least 7.5% by mass and no greater than 12.5% by mass. An amount of the styrene-acrylic acid-based resin contained in the toner is at least 50 parts by mass and no greater than 100 parts by mass relative to 100 parts by mass of the releasing agent. The crystalline polyester resin includes an acrylic acid-based unit and a styrene-based unit. The styrene-acrylic acid-based resin includes an acrylic acid-based unit that has an epoxy group and a styrene-based unit. A peak top molecular weight of the toner in a differential molecular weight distribution curve is at least 8,000 and no greater than 12,000. A mass average molecular weight of the toner is at least 40,000 and no greater than 65,000.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: February 12, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Masaki Okita
  • Patent number: 10120295
    Abstract: An image forming apparatus includes a fixing unit that includes a heating and pressurizing member, and fixes the toner image by performing the operation of heating and pressurizing on the toner image on a recording medium twice or more times with the heating and pressurizing member, wherein the toner contains a toner particle which contains a binder resin containing a crystalline polyester resin, a colorant, and a release agent, and an external additive, and satisfies Expression: 2?tan ?P1?2.5, wherein tan ?P1 represents a maximum value of a mechanical loss tangent existing in a range where a complex elastic modulus is from 1×106 Pa to 1×108 Pa, which is measured at an angular frequency of 6.28 rad/sec and a distortion amount of 0.3%.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: November 6, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Naoki Ota, Masataka Kuribayashi, Takafumi Koide, Yusuke Fukuda, Katsuyuki Kitajima, Yasuhisa Morooka
  • Patent number: 10054867
    Abstract: A toner includes a plurality of toner particles each including a toner core and a shell layer covering a surface of the toner core. The toner core contains a crystalline polyester resin, a crosslinked non-crystalline polyester resin, and an uncrosslinked non-crystalline polyester resin. An endothermic energy amount ?HPES is at least 0.0 mJ/mg and no greater than 1.0 mJ/mg. The shell layer contains a resin that has a repeating unit including an oxazoline group. The toner has a glass transition point of at least 10° C. and no greater than 40° C. Loss tangents tan ?60 and tan ?100 of the toner are each at least 1.00 and no greater than 4.00. Loss tangents tan ?160 and tan ?200 of the toner are each at least 0.01 and no greater than 0.50.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: August 21, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Haruhiro Nishitera
  • Patent number: 9964879
    Abstract: Provided is a toner comprising a toner particle containing a binder resin, a resin A, and a pigment, wherein the resin A has a pKa of at least 6.0 and not more than 9.0, and also has a hydrophobic parameter HPA of at least 0.65 and not more than 0.95.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: May 8, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuhei Terui, Yu Yoshida, Haruko Kubo, Hitoshi Itabashi
  • Patent number: 9915883
    Abstract: The toner of the present invention is an electrostatic latent image developing toner, and has a toner base particle. The toner base particle contains a binder resin including a crystalline resin, and a release agent. The toner has the maximum value G?MAX at a temperature equal to or lower than Tm, among specific storage elastic modulus ratios, of 2.2 or more. The Tm represents a peak top temperature (° C.) of a specific endothermic peak in DSC of the toner.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: March 13, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takaki Kawamura, Kenshi Miyajima, Junya Ueda
  • Patent number: 9904195
    Abstract: A toner comprising: a toner particle containing a binder resin and a colorant, and an inorganic fine particle A and B present on the surface of the toner particle, wherein the inorganic fine particle A is a silica fine particle having a number-average particle diameter (D1) of primary particles in a specific range, the inorganic fine particle B has a number-average particle diameter (D1) of primary particles in a specific range, and is at least one fine particle selected from a group consisting of a silica fine particle, a titanium oxide fine particle, and an alumina fine particle, A total fixing ratio of the inorganic fine particle A and B is 75% or more, and an inter-particle force Fp(A) and an inter-particle force Fp(B) are within specific numerical ranges and satisfy a specific relationship.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: February 27, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takashi Matsui, Naoki Okamoto, Satoshi Arimura, Keisuke Tanaka, Shohei Tsuda
  • Patent number: 9841692
    Abstract: Provided is a toner having a toner particle that contains a binder resin, a colorant, a wax, and a crystalline polyester, wherein two or more peak tops for crystallization peaks are present in a temperature range from 40° C. to 80° C. in a first DSC curve obtained by a process or cooling the toner from 100° C. to 20° C. at 0.5° C./min, and using ?H(0.5) for the exothermic quantity for the peak on the lowest temperature side of these crystallization peaks and using ?H(100) for the exothermic quantity of the crystallization peak on the lowest temperature side in a second DSC curve obtained by a process of cooling the toner from 100° C. to 20° C. at 100° C./min, the ratio [?H(100)/?H(0.5)] is at least 2.0 and not more than 6.0.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: December 12, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yusuke Hasegawa, Tomohisa Sano, Yoshitaka Suzumura, Kozue Uratani, Yuujirou Nagashima
  • Patent number: 9835964
    Abstract: The present invention provides a toner that exhibits an excellent colorant dispersibility and hence maintains the formation of a high-quality image, that is capable of low-temperature fixing, and that has a satisfactory heat-resistant storability and a satisfactory durability, in which the toner comprising a toner particle that contains a colorant and a binder resin containing a styrene-acrylic resin and a crystalline resin, wherein a compatibility parameter (V) between the styrene-acrylic resin and the crystalline resin satisfies 0.40?V?1.10.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: December 5, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yu Yoshida, Masatake Tanaka, Yoshihiro Nakagawa, Naoya Isono, Tsutomu Shimano, Shintaro Noji
  • Patent number: 9785066
    Abstract: A toner includes a plurality of toner particles containing a binder resin and one or more microcapsules that contain a fragrant material. A ratio of a number of toner particles that contain at least one microcapsule in a region from a surface thereof to 1 ?m in depth with respect to a total number of toner particles in the region is equal to or greater than 60%.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: October 10, 2017
    Assignees: Kabushiki Kaisha Toshiba, Toshiba TEC Kabushiki Kaisha
    Inventors: Maiko Yoshida, Satoshi Araki, Taishi Takano, Takashi Urabe, Junichi Ishikawa
  • Patent number: 9715184
    Abstract: A method for producing a toner for electrostatic image development containing at least an amorphous polyester and a crystalline polylactic acid, including step 1: mixing an amorphous polyester and a crystalline polylactic acid at a temperature of from 140° to 250° C.; step 2: melt-kneading a mixture obtained in the step 1; and step 3: pulverizing and classifying a melt-kneaded product obtained in the step 2; and a toner for electrostatic image development obtainable by the method. The toner for electrostatic image development obtainable by the method of the present invention is suitably used in development or the like of latent images formed in an electrostatic development method, an electrostatic recording method, an electrostatic printing method, or the like.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: July 25, 2017
    Assignee: Kao Corporation
    Inventors: Takeshi Ashizawa, Shogo Watanabe
  • Patent number: 9703218
    Abstract: A toner for developing electrostatic images contains a first resin and a second resin. The first resin is a crystalline polyester resin composed of a dicarboxylic acid unit and a dialcohol unit. The first resin has a weight average molecular weight of 5000 to 100000. The second resin has a weight average molecular weight of 5000 to 60000. The second resin is a polyester resin composed of a crystalline segment and an amorphous segment. The crystalline segment has a weight average molecular weight of 200 to 3000 and is composed of a dicarboxylic acid unit and a dialcohol unit. In the toner, a specific carbon number relationship is present between each unit.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: July 11, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tomomi Oshiba, Ken Ohmura, Kaori Matsushima, Noboru Ueda, Ito Koga, Noriyuki Kimpara
  • Patent number: 9678448
    Abstract: A method for producing a toner for electrostatic image development containing at least an amorphous polyester and a crystalline polylactic acid, including step 1: mixing an amorphous polyester and a crystalline polylactic acid at a temperature of from 140° to 250° C.; step 2: melt-kneading a mixture obtained in the step 1; and step 3: pulverizing and classifying a melt-kneaded product obtained in the step 2; and a toner for electrostatic image development obtainable by the method. The toner for electrostatic image development obtainable by the method of the present invention is suitably used in development or the like of latent images formed in an electrostatic development method, an electrostatic recording method, an electrostatic printing method, or the like.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: June 13, 2017
    Assignee: Kao Corporation
    Inventors: Takeshi Ashizawa, Shogo Watanabe
  • Patent number: 9523937
    Abstract: An electrostatic latent image developing toner includes toner particles that each include a toner core and a shell layer disposed over a surface of the toner core. The shell layer contains a first shell resin and a second shell resin. The first shell resin is a hydrophilic thermoplastic resin, a hydrophobic thermoplastic resin, or a hydrophobic thermosetting resin. The second shell resin is a hydrophilic thermosetting resin. The first shell resin includes a repeating unit having an alcoholic hydroxyl group.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: December 20, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Masami Tsujihiro, Ryota Kobayashi, Hideharu Hori, Yusuke Washino
  • Patent number: 9415581
    Abstract: An image recording method includes recording an intermediate image by applying an ink to an intermediate transfer body, the ink containing a coloring material and polymer fine particles; and transferring the intermediate image onto a recording medium while heating the intermediate. The polymer fine particles are composed of a copolymer of a first compound that satisfies condition (1) (a polymer obtained by homopolymerization of the first compound is a crystalline polymer having a melting point equal to or lower than a temperature of the transfer) and a second compound that satisfies condition (2) (a polymer obtained by homopolymerization of the second compound is an amorphous polymer having a glass transition point equal to or lower than the temperature of the transfer).
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: August 16, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoru Kobayashi, Naofumi Shimomura, Masanori Jinnoh, Takashi Imai, Yutaka Kurabayashi
  • Patent number: 9395639
    Abstract: A liquid electrophotographic ink includes a non-polar carrier fluid, a metallic pigment particle, and resin particles. The metallic pigment particle includes a non-functionalized aluminum pigment, and a latex layer directly contacting a surface of the non-functionalized aluminum pigment to encapsulate the non-functionalized aluminum pigment. The resin particles are i) present as discrete particles in the non-polar carrier fluid or ii) associated with the latex layer.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: July 19, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Sivapackia Ganapathiappan, Hou T. Ng, Albert Teishev
  • Patent number: 9261804
    Abstract: The present invention provides a toner that exhibits an excellent low-temperature fixability and an excellent ejected paper adhesiveness during high-speed printing, without affecting the long-term storage stability, in which the toner has a toner particle that contains a resin component, wherein the toner has, in a DSC curve measured with a differential scanning calorimeter, a glass transition temperature of at least 50° C. and not more than 65° C. and a cold crystallization peak during cooling of at least 40° C. and not more than 70° C., and has an endothermic peak in a DSC curve measured with a differential scanning calorimeter for the resin component of at least 70° C. and not more than 95° C.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: February 16, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Katsuhisa Yamazaki, Daisuke Yoshiba, Koji Nishikawa, Shotaro Nomura, Hiroki Akiyama, Masami Fujimoto
  • Patent number: 9176405
    Abstract: Composite materials such as composite particles have a solid non-elastomeric continuous phase made of an organic polymer having a glass transition temperature of at least 25° C. Dispersed within this solid non-elastomeric continuous phase are many multi-compartment porous chemically crosslinked elastomeric particles that have a mode particle size of at least 1 ?m and up to and including 10 ?m. The composite particles can be used as toner particles in electrophotographic imaging methods to provide fused toner images and especially stacked fused toner images.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: November 3, 2015
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Mridula Nair, Joseph Salvatore Sedita, Peter David Rollinson
  • Patent number: 9128396
    Abstract: Methods for making toner particles comprising a polyester-wax resin, wherein the polyester-wax resin includes a bio-based oil that is chemically incorporated into the main chain of the polyester resin. The toner particles may be formed using emulsion aggregation methods. A toner formed from the toner particles may be used in low-oil or oil-less fusing systems.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: September 8, 2015
    Assignee: XEROX CORPORATION
    Inventor: Valerie M. Farrugia
  • Publication number: 20150140488
    Abstract: An electrostatic charge image developing toner contains a plurality of toner particles. Each of the toner particles includes a toner core containing a binder resin and a shell layer coating the toner core. The shell layers contain a thermosetting resin. The toner cores have a negative zeta potential in an aqueous medium adjusted to pH 4. The toner particles have a positive zeta potential in an aqueous medium adjusted to pH 4. The shell layers have a film thickness of 1 nm or more and 20 nm or less.
    Type: Application
    Filed: November 10, 2014
    Publication date: May 21, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Kohei TERASAKI
  • Patent number: 9034548
    Abstract: A toner containing colorant, releasing agent, and binder resin containing crystalline polyester resin, and non-crystalline polyester resin containing urethane bond, urea bond, or both, the non-crystalline polyester resin containing first and second non-crystalline polyester resins, both containing urethane bond, or urea bond, or both, wherein monomers constituting the first non-crystalline polyester resin contains isocyanate monomer for forming the urethane bond, the urea bond, or the both, in an amount of 0.5 mol % or greater to total amount of the monomers, monomers constituting the second non-crystalline polyester resin contain isocyanate monomer for forming the urethane bond, the urea bond, or the both, in an amount of 0.5 mol % or greater to total amount of the monomers, the first non-crystalline polyester resin has Tg of ?60° C. or higher but lower than 10° C., and the second non-crystalline polyester resin has Tg of 30° C. or higher but lower than 70° C.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: May 19, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuru Moritani, Hiroshi Yamashita, Tsuyoshi Sugimoto, Daisuke Asahina, Rintaro Takahashi, Susumu Chiba
  • Publication number: 20150132696
    Abstract: A toner, including: a binder resin; and a releasing agent, wherein the toner includes a pressure plastic material as the binder resin, wherein the releasing agent includes a plurality of particulate releasing agents, and wherein the particulate releasing agents forming domain phases are dispersed in the pressure plastic material forming a continuous phase.
    Type: Application
    Filed: April 30, 2013
    Publication date: May 14, 2015
    Inventors: Keiko Osaka, Chiaki Tanaka, Masaki Watanabe
  • Publication number: 20150132697
    Abstract: A toner includes toner particles, each containing binder resin and a plurality of microcapsules dispersed therein, each of the microcapsules containing a liquid material. A method for forming an image on a medium includes forming an electrostatic latent image on a carrier, forming a toner image by developing the electrostatic latent image using the toner, transferring the toner image onto a medium, and fixing the transferred toner image on the medium.
    Type: Application
    Filed: November 13, 2014
    Publication date: May 14, 2015
    Inventors: Maiko YOSHIDA, Satoshi ARAKI, Taishi TAKANO, Takashi URABE
  • Patent number: 9029055
    Abstract: A magnetic toner which has superior charging stability and charging uniformity, maintains stable developing performance without any dependence on service environments and may less cause any decrease in image density and any image defects such as fog and ghost, the magnetic toner has magnetic toner particles, each of the magnetic toner particles has magnetic toner base particle containing a binder resin and a magnetic material, and an inorganic fine powder, (a) the magnetic toner having, at a frequency of 100 kHz and a temperature of 30° C., a dielectric loss factor (??) of 2.5×10?1 pF/m or more and 7.0×10?1 pF/m or less and a dielectric dissipation factor (tan ?L) of 3.0×10?2 or less, (b) the magnetic toner having, in a dielectric dissipation factor (tan ?) thereof at a frequency of 100 kHz, a maximum value (tan ?H) within the temperature range of 60° C. to 140° C.; and the tan ?H and the tan ?L satisfying (tan ?H?tan ?L)?3.0×10?2.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: May 12, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kozue Aoki, Yusuke Hasegawa, Yoshitaka Suzumura
  • Patent number: 9023568
    Abstract: A resin binder for use in a toner, containing an amorphous polyester having a furan ring; and a toner for electrophotography, containing the resin binder. The resin binder for use in a toner of the present invention is suitably used in a toner usable in development of latent images formed in electrophotography, an electrostatic recording method, an electrostatic printing method, or the like.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: May 5, 2015
    Assignee: Kao Corporation
    Inventors: Takashi Kubo, Osamu Yamashita, Norihiro Hirai
  • Patent number: 9023565
    Abstract: A developer includes a toner containing at least a binder resin, wherein the toner has a molecular weight distribution Mz/Mw of 2.0 or smaller and a phase angle of viscoelasticity of 65° or greater.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: May 5, 2015
    Assignee: Oki Data Corporation
    Inventor: Yoshihiro Hashimoto
  • Publication number: 20150118612
    Abstract: An electrostatic latent image developing toner includes toner particles each including a toner core containing a binder resin and a shell layer on a surface of the toner core. The shell layer includes a unit derived from a monomer of a thermosetting resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The inorganic particles intervene in an interface between the toner core and the shell layer. The inorganic particles have a number average particle diameter of 60 nm or more and 250 nm or less. Protrusions having a shape that follows a shape of the inorganic particles are on surfaces of the toner particles.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 30, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Ken MAETANI
  • Publication number: 20150111139
    Abstract: An electrostatic charge image developing toner includes a binder resin, toner particles containing an acylglycerol, and an external additive, wherein at least one of hydroxyl groups in the acylglycerol is esterified with an alkyl monocarboxylic acid that contains a substituted or unsubstituted alkyl group having from 12 to 22 carbon atoms, and a content of a portion esterified with the alkyl monocarboxylic acid that contains the alkyl group having the same carbon number is 95% by weight or greater with respect to the total weight of the acylglycerol.
    Type: Application
    Filed: April 16, 2014
    Publication date: April 23, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yuki TAKAMIYA, Eisuke IWAZAKI, Shuji SATO, Noriyuki MIZUTANI
  • Publication number: 20150111144
    Abstract: Composite materials such as composite particles have a solid non-elastomeric continuous phase made of an organic polymer having a glass transition temperature of at least 25° C. Dispersed within this solid non-elastomeric continuous phase are many multi-compartment porous chemically crosslinked elastomeric particles that have a mode particle size of at least 1 ?m and up to and including 10 ?m. The composite particles can be used as toner particles in electrophotographic imaging methods to provide fused toner images and especially stacked fused toner images.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 23, 2015
    Inventors: Mridula Nair, Joseph Salvatore Sedita, Peter David Rollinson
  • Patent number: 9012116
    Abstract: A toner including a binder resin having a glass transition temperature (Tg) observed at least at one point from 25 to 65° C. in a differential scanning calorimeter at a rate of temperature increase of 5° C./min, wherein the toner has a structure in which a structure appearing as a high phase difference image is dispersed in a structure appearing as a low phase difference image in a two-dimensional phase difference image observed by tapping mode AFM, and an X-ray diffraction chart in which a peak originated from an crystalline resin is observed in a range of a diffraction angle 2? of from 20 to 25°, and wherein a ratio (I1/I2) of an intensity of the peak originated from an crystalline resin to an intensity (I2) of a halo originated from an amorphous composition is from 0.2 to 1.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: April 21, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Daiki Yamashita, Yoshihiro Moriya, Yukiko Nakajima, Taichi Nemoto, Yoshitaka Yamauchi, Keiji Makabe, Masahide Yamada, Suzuka Amemori
  • Patent number: 9012118
    Abstract: Toners are provided which possess excellent blocking characteristics. The toners include cores including amorphous resins having low glass transition temperatures, amorphous resins having high glass transition temperatures, and crystalline resins, and shells including amorphous resins having high glass transition temperatures.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: April 21, 2015
    Assignee: Xerox Corporation
    Inventors: Allan K. Chen, Tie Hwee Ng, Edward Graham Zwartz, Michael S. Hawkins
  • Patent number: 9005860
    Abstract: An electrostatic-image developing toner contains a polyester resin prepared by addition reaction of a polycondensate of a carboxylic acid component and an alcohol component with an isocyanate-containing compound. The polycondensate has an active hydrogen group. The alcohol component includes a rosin diol represented by general formula (1): (wherein R1 and R2 are each independently hydrogen or methyl; L1, L2, and L3 are each independently a divalent linking group selected from the group consisting of carbonyl, carboxyl, ether, sulfonyl, optionally substituted linear alkylenes, optionally substituted cyclic alkylenes, optionally substituted arylenes, and combinations thereof; L1 and L2 or L1 and L3 are optionally taken together to form a ring; and A1 and A2 are rosin ester groups).
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: April 14, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Emi Miyata, Hirotaka Matsuoka, Susumu Yoshino, Yuki Sasaki
  • Patent number: 9005859
    Abstract: A colorless transparent toner containing a crystalline resin having a urethane bond and/or a urea bond.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: April 14, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Akiyoshi Sabu, Shinya Nakayama, Atsushi Yamamoto, Yukiko Nakajima, Hideyuki Santo
  • Patent number: 9005868
    Abstract: The present invention relates to a process for producing a toner for electrophotography which includes the step of fusing aggregated particles containing resin particles (A) and releasing agent particles in an aqueous mixed solution containing the aggregated particles and an anionic surfactant having a polyalkylene glycol moiety with an average molar number of addition of an alkylene oxide having 2 to 3 carbon atoms of from 5 to 100 after and/or while adjusting a pH value of the aqueous mixed solution to 2.0 to 6.0 as measured at 25° C., and a toner for electrophotography obtained by the process.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: April 14, 2015
    Assignee: Kao Corporation
    Inventors: Shoichi Murata, Takayuki Ikenaga, Takashi Okuno, Hiroshi Mizuhata, Keishi Yokota, Koji Shimokusa, Koji Kameyama
  • Publication number: 20150079504
    Abstract: Provided is a toner that has a plurality of toner particles. Each toner particle can include a binder resin core and a shell disposed about the binder resin core. The binder resin core can include at least one binder resin. The shell can include a plurality of metal nanoparticles. The binder resin core can be prepared by forming an aggregate of the binder resin in which metallic nanoparticles are not present.
    Type: Application
    Filed: September 17, 2013
    Publication date: March 19, 2015
    Applicant: XEROX CORPORATION
    Inventor: Valerie M. Farrugia
  • Publication number: 20150072278
    Abstract: A toner comprised of toner particles including an amorphous resin and a crystalline resin is provided. The coefficient of variation in softening temperature among resin portions in the toner particles is 15% or less when the softening temperature is measured with a scanning probe microscope equipped with a heatable cantilever.
    Type: Application
    Filed: July 23, 2014
    Publication date: March 12, 2015
    Inventors: Yuka MIZOGUCHI, Hideki SUGIURA, Mio KUMAI
  • Publication number: 20150072285
    Abstract: According to one implementation, a toner includes a toner mother particle and a convex portion on a surface of the toner mother particle. The toner mother particle includes at least a resin (1). The convex portion is formed from a resin particle including at least a resin (2). An average value of a length of a long side of the convex portion is within a range of 0.1 to 0.5 ?m. A ratio between a Young's modulus of a non-convex portion of the toner mother particle (ER (1)) and a Young's modulus of a convex portion of the toner mother particle (ER (2)) is a value (ER (1)/ER (2)) within the range of 1.2 to 2.0.
    Type: Application
    Filed: September 3, 2014
    Publication date: March 12, 2015
    Inventors: Junichi FURUKAWA, Shiro HIRANO, Kenshi MIYAJIMA, Naoya TONEGAWA, Asao MATSUSHIMA, Tatsuya NAGASE
  • Publication number: 20150050590
    Abstract: An electrostatic charge image developing toner includes toner particles containing an amorphous resin and a crystalline resin, wherein when a softening temperature is measured at 30 points in surface layer parts of the toner particles, a difference (TH(° C.)?TL(° C.)) between a maximum value (TH(° C.)) and a minimum value (TL(° C.)) out of the softening temperatures at the 30 points is from 25° C. to 100° C.
    Type: Application
    Filed: May 27, 2014
    Publication date: February 19, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kiyohiro YAMANAKA, Soichiro KITAGAWA, Tomohiro SHINYA, Shinpei TAKAGI
  • Patent number: 8956796
    Abstract: Provided is an electrostatic charge image developing toner including toner base particles which contain a polyester resin and a vinyl resin and does not have a coating layer and wherein the concentration of the polyester resin on the particle surface is higher than the concentration of the polyester resin in the inside of the particles, and a sol-gel silica which has an average circularity of from 0.75 to 0.9, on the surface of the toner base particles.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: February 17, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Kadokura, Kazufumi Tomita, Hideaki Yoshikawa
  • Publication number: 20150044605
    Abstract: A developer of the present disclosure contains: toner particles each containing a binder resin and a magnetic powder; cross-linked polyester resin particles having a particle size of 2 ?m or more and 30 ?m or less; and an external additive. The toner particles and the cross-linked polyester resin particles are externally treated with the external additive in the same manner.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 12, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Akinori KOYAMA
  • Patent number: 8951704
    Abstract: A toner includes a crystalline polyester resin having an unsaturated double bond, a thiol compound having a bi- or more-functional thiol group, and a photopolymerization initiator.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: February 10, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Koji Horiba, Yoshihiro Inaba, Daisuke Yoshino, Takako Kobayashi, Akira Imai, Masahiro Oki, Hiroyuki Moriya
  • Publication number: 20150037718
    Abstract: A toner, including: a crystalline resin; a non-crystalline resin; and a colorant, wherein the toner has a sea-island structure which includes a sea containing the crystalline resin and an island containing the non-crystalline resin and the colorant, wherein the island is 1.0 ?m or less in domain diameter, and wherein the toner is 1.7×104 Pa or less in storage elastic modulus at 160° C.
    Type: Application
    Filed: March 7, 2013
    Publication date: February 5, 2015
    Inventors: Tatsuya Morita, Kazumi Suzuki, Shingo Sakashita, Masana Shiba, Taichi Nemoto, Yoshitaka Yamauchi, Azumi Miyaake, Rintaro Takahashi
  • Publication number: 20150037726
    Abstract: The toner comprises: toner particles each containing a binder resin and a releasing agent; and an organic-inorganic composite fine particle, wherein: the organic-inorganic composite fine particle comprises: a vinyl resin particle containing a vinyl resin, the vinyl resin containing THF-insoluble matter in an amount of 95% by mass or more; and inorganic fine particles which are exposed at surfaces of the respective organic-inorganic composite fine particles, the organic-inorganic composite fine particle 1) has a plurality of convexes derived from the inorganic fine particles on the surfaces thereof, 2) has a number average particle size of 70-500 nm, and 3) has a shape factor SF-2 as measured at a magnification of 200,000 times of 103-120, and an absolute value of difference between an SP value of the releasing agent and an SP value of the vinyl resin is 0.50 (cal/cm3)1/2 or less.
    Type: Application
    Filed: July 24, 2014
    Publication date: February 5, 2015
    Inventors: Shotaro Nomura, Masami Fujimoto, Katsuhisa Yamazaki, Kouji Nishikawa, Daisuke Yoshiba, Hiroki Akiyama
  • Publication number: 20150030976
    Abstract: A black toner for developing a latent electrostatic image, including: a toner base containing a pigment, a binder resin, a releasing agent, a compound containing fluorine and a compound containing sulfur; and an external additive, wherein the toner contains the external additive on a surface of the toner base, and wherein an amount of the fluorine in the toner base is 200 ppm by mass to 600 ppm by mass as measured by combustion-ion chromatography, and an amount of the sulfur in the toner base is 1,000 ppm by mass to 1,500 ppm by mass as measured by the combustion-ion chromatography.
    Type: Application
    Filed: February 28, 2013
    Publication date: January 29, 2015
    Inventors: Kei Yokokawa, Yasuaki Iwamoto, Takahiro Kadota
  • Patent number: 8940467
    Abstract: A toner is provided that, even in a small amount thereof, gives a satisfactory image density and that is free of image problems, e.g., fogging and offset resistance, even during long-term use and in a high-temperature, high-humidity environment. The toner contains a binder resin, a pigment, and a prescribed azo compound wherein, designating as (A) the solubility of the azo compound in a toluene-hexane solubility test and as (B) the solubility of the binder resin constituting the toner in the toluene-hexane solubility test, the (A) and the (B) satisfy the relationship |(B)?(A)|?60.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: January 27, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuhiro Hashimoto, Takayuki Toyoda, Masashi Kawamura, Naotaka Ikeda, Hidekazu Fumita, Emi Watanabe, Yuhei Terui
  • Publication number: 20150024312
    Abstract: A toner, including: a binder resin; and a colorant, wherein the toner has a storage modulus of 1.0×107 Pa or more at 50° C., a loss modulus of 8.0×104 Pa to 2.0×105 Pa at 80° C., and a loss modulus of 2.0×102 Pa to 1.0×103 Pa at 160° C.
    Type: Application
    Filed: February 28, 2013
    Publication date: January 22, 2015
    Inventors: Masana Shiba, Hiroshi Yamashita, Tsuyoshi Sugimoto, Daisuke Asahina, Yukari Fukuda, Rintaro Takahashi, Satoyuki Sekiguchi
  • Publication number: 20150024316
    Abstract: A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having an engineering-grade thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
    Type: Application
    Filed: July 16, 2014
    Publication date: January 22, 2015
    Inventors: James E. Orrock, Steven A. Chillscyzn, Trevor I. Martin
  • Publication number: 20150024317
    Abstract: A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a high-performance thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
    Type: Application
    Filed: July 16, 2014
    Publication date: January 22, 2015
    Inventors: James E. Orrock, Steven A. Chillscyzn, Trevor I. Martin
  • Patent number: 8936897
    Abstract: A composite color toner image can be enhanced by applying a separate fluorescing toner image over it to provide an enhanced color toner image having a “pinkish” fluorescing effect. This separate fluorescing toner image is obtained using visible fluorescing dry magenta toner particles. Each of these toner particles consists essentially of a polymeric binder phase and a visible fluorescing colorant that emits at one or more peak wavelengths of at least 510 nm and up to and including 590 nm and that is dispersed within the polymeric binder phase.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: January 20, 2015
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Louise Granica, Chung-Hui Kuo
  • Publication number: 20150017583
    Abstract: The object of the present invention is to provide a toner for development of electrostatic images (hereinafter referred to as toner) which, while preventing dust during fixation, secures improved hot offset resistance and is excellent in providing good image quality. The invention relates to the toner that comprises a binder resin, a colorant and a wax, wherein the wax has, while in a state of being contained in the toner, a melting point of from 55° C. to 90° C., and the value Dt of the toner satisfies a specific formula.
    Type: Application
    Filed: September 30, 2014
    Publication date: January 15, 2015
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Masaya OTA, Shiho Sano