Polyester Backbone Binder (e.g., Condensation Reaction Product, Etc.) Patents (Class 430/109.4)
  • Patent number: 11130355
    Abstract: A contact member (4) includes a surface containing a fluororesin fiber layer containing a fluororesin fiber, wherein the surface contacts a contact-target member (6) having an area to which a liquid composition is applied and the fluororesin fiber layer has a thickness of 500 pm or more.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: September 28, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuki Mizutani, Tomohiro Tamai
  • Patent number: 11126098
    Abstract: An electrostatic charge image development toner contains toner particles and layered-structure compound particles. The layered-structure compound particles have a crystallite diameter of 150 ? or more and 250 ? or less as calculated from a maximum peak width in a Cu K? X-ray diffraction chart and have a number-average particle diameter Dn of 0.3 ?m or more and 2.0 ?m or less. The ratio Dn/Dv of a number-average particle diameter Dn of the layered-structure compound particles to a volume-average particle diameter Dv of the toner particles is 0.03 or more and 0.7 or less.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: September 21, 2021
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Yutaka Saito, Daisuke Noguchi, Sakiko Takeuchi
  • Patent number: 11101013
    Abstract: Disclosed are a shift register, a method for fabricating an inverter, a gate driving circuit, and a display device, and the shift register includes a first pull-down circuit, a second pull-down circuit, and a first inverter, where the first pull-down circuit is configured to operate under the control of a first level of a power source terminal, and to be disabled under the control of a second level of the power source terminal; and the first inverter is configured to provide the second pull-down circuit with a signal of a first signal terminal under the control of the first level of the power source terminal to disable the second pull-down circuit, and to provide the second pull-down circuit with a signal of a second signal terminal under the control of the second level of the power source terminal to drive the second pull-down circuit to operate.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: August 24, 2021
    Assignees: Beijing BOE Display Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Xiao Wang, Yu Ma, Yan Yan
  • Patent number: 11061343
    Abstract: A toner including: a plate-shaped pigment containing a metal as a main component; and a binder resin containing polyester resin (A) that is insoluble in THF, wherein: a weight average molecular weight (Mw) of a tetrahydrofuran (THF)-soluble component of the toner as determined by gel permeation chromatography (GPC) is 5,000 or higher but 14,000 or lower; and a glass transition temperature (Tg) of a THF-insoluble component of the toner as determined from a differential scanning colorimetry (DSC) curve at first heating in DSC is ?60° C. or higher but 10° C. or lower.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: July 13, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuka Mizoguchi, Ryota Inoue, Hiroshi Yamashita, Minoru Masuda, Daichi Hisakuni, Tomomi Harashima
  • Patent number: 11036154
    Abstract: A toner is provided. The toner comprises a colorant, a release agent, and a binder resin. The binder resin comprises a crystalline polyester resin and an amorphous polyester resin. The amorphous polyester resin comprises an amorphous polyester resin A and an amorphous polyester resin B. The amorphous polyester resin A comprises an isocyanurate backbone and at least one of urethane bond and urea bond. The amorphous polyester resin B comprises a trimellitic acid backbone and at least one of urethane bond and urea bond.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: June 15, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Ukigaya, Junichi Awamura, Hiroshi Yamada, Kohsuke Nagata, Hiroyuki Takeda
  • Patent number: 11022905
    Abstract: The present invention relates to a toner binder containing: a polyester resin (A); and a vinyl resin (B), wherein the polyester resin (A) is a resin obtained by crosslinking a polyester (A1) by one or more carbon-carbon bonds, the vinyl resin (B) is a polymer containing a monomer (a) as an essential constituent monomer, the monomer (a) is a C21-C40 (meth)acrylate having an acyclic hydrocarbon group, and the weight proportion of the monomer (a) in monomers constituting the vinyl resin (B) is 15 to 99% by weight based on the weight of the vinyl resin (B).
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: June 1, 2021
    Assignee: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Masaru Honda, Seiji Odaka, Daiki Kuroda
  • Patent number: 10942463
    Abstract: A toner including a toner particle containing a polyester resin composition, wherein i) the polyester resin composition contains a specific aliphatic hydrocarbon and a polyester resin having at a terminal a structure derived from at least one of a specific alkyl monoalcohol and a specific alkyl monocarboxylic acid, and ii) the total content of the aliphatic hydrocarbon, the structure derived from the alkyl monoalcohol, and the structure derived from the alkyl monocarboxylic acid is 2.5 to 10.0% by mass, wherein, in the temperature-endothermic quantity curve of the polyester resin composition obtained by DSC, an endothermic peak is present in a specific temperature range and an endothermic quantity for this endothermic peak is 0.10 to 1.90 J/g.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: March 9, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Yoshiba, Hiroki Akiyama, Koji Nishikawa, Shotaro Nomura, Katsuhisa Yamazaki
  • Patent number: 10877387
    Abstract: A magnetic toner comprising a magnetic toner particle including a binder resin, a magnetic body and a crystalline polyester, wherein a storage elastic modulus E?(40) [Pa] at 40° C. and a storage elastic modulus E?(85) [Pa] at 85° C., which are obtained in a powder dynamic viscoelasticity measurement of the magnetic toner, satisfy the following formulas (1) to (3). E?(40)?6.0×109??(1) E?(85)?5.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: December 29, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kosuke Fukudome, Tetsuya Kinumatsu, Yusuke Hasegawa
  • Patent number: 10859932
    Abstract: A toner, including: a polyester resin, wherein the polyester resin has a structure represented by any one of formulas 1) to 3) below: 1) R1-(NHCONH-R2)n-, 2) R1-(NHCOO-R2)n-, and 3) R1-(OCONH-R2)n-, where n is 3 or more, R1 represents an aromatic organic group or an aliphatic organic group, and R2 represents a group derived from a resin that is polyester formed of polycarboxylic acid, polyol, or both thereof; or that is a modified polyester obtained by modifying polyester with isocyanate.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: December 8, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuyoshi Sugimoto, Shinya Nakayama, Hiroshi Yamada, Hideyuki Santo, Ryuta Chiba, Suzuka Amemori, Kohsuke Nagata
  • Patent number: 10859933
    Abstract: A magnetic toner comprising a magnetic toner particle including a binder resin, a magnetic body and a crystalline polyester, wherein the dielectric loss tangent at 100 kHz is 1.0×10?2 or more, a variation coefficient CV3 of an occupied area ratio of the magnetic body when a cross section of the magnetic toner particle is divided by a square grid having a side of 0.8 ?m in cross-sectional observation of the magnetic toner particle using a transmission electron microscope TEM is from 30.0% to 80.0%, and where a storage elastic modulus of the magnetic toner at 40° C. is taken as E?(40) [Pa] and a storage elastic modulus of the magnetic toner at 85° C. is taken as E?(85) [Pa], the following formulas (1) and (2) are satisfied: E?(85)?5.5×109??(1) [E?(40)?E?(85)]×100/E?(40)?30??(2).
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: December 8, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tetsuya Kinumatsu, Kosuke Fukudome, Yusuke Hasegawa
  • Patent number: 10808241
    Abstract: The present invention relates, in part, to methods for large-scale purification of mRNA. The method includes, at least, steps of forming an mRNA slurry, stirring the slurry, and vacuum or pressure filtering the slurry.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: October 20, 2020
    Assignee: Translate Bio, Inc.
    Inventors: Jonathan Abysalh, Daniel Crawford, Frank DeRosa, Shrirang Karve, Anusha Dias, Michael Heartlein
  • Patent number: 10795274
    Abstract: An electrostatic charge image developing toner includes a continuous phase containing a binder resin (i); and a discontinuous phase that has a core containing a binder resin (ii) and a coating layer covering the core and containing a binder resin (iii), and is dispersed in the continuous phase.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: October 6, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shinya Nakashima, Shinya Sakamoto, Tomohiro Shinya, Naomi Miyamoto, Masaki Iwase, Ryutaro Kembo, Tomohito Nakajima
  • Patent number: 10768543
    Abstract: A toner having a toner particle, which contains a binder resin, and inorganic fine particles, the toner being characterized in that the binder resin contains a polyester resin, the polyester resin has, at a terminal, an alkyl group having an average number of carbon atoms of from 4 to 102, the number average particle diameter of primary particles of the inorganic fine particles is from 10 to 90 nm, the dielectric constant of the inorganic fine particles is from 55.0 to 100.0 pF/m, as measured at 25° C. and 1 MHz, and the inorganic fine particles are surface-treated with an alkylalkoxysilane represented by formula (1) below: CnH2n+1—SiOCmH2m+1)3??(1) in formula (1), n denotes an integer of from 4 to 20, and m denotes an integer of from 1 to 3.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: September 8, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Tsujimoto, Toru Takahashi, Hiroki Watanabe, Yoshihiro Ogawa, Wakashi Iida
  • Patent number: 10732532
    Abstract: An electrostatic image developing toner includes toner base particles including at least a binder resin and a release agent, wherein the binder resin includes a hybrid resin having a polyester resin segment and a styrene-acrylic copolymer segment, and a molecular weight distribution curve of the toner satisfies Formula (1): 1.3?b/a?2.5, where, in the molecular weight distribution curve in which a perpendicular line is drawn from a baseline to a peak top having a peak top height to divide the molecular weight distribution curve into a lower-molecular-weight region and a higher-molecular-weight region, a represents a width of the lower-molecular-weight region at a height of 15% of the peak top height, and b represents a width of the higher-molecular-weight region at a height of 15% of the peak top height.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: August 4, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Atsushi Sugawara, Yasuo Kadokura, Daisuke Tomita
  • Patent number: 10691034
    Abstract: There are provided a polyester resin for toner which has a sufficiently low TVOC, can be produced with high productivity, and can produce toner having excellent durability; and toner containing the polyester resin for toner. The polyester resin for toner has a TVOC of 380 ppm or less and includes a component derived from ethylene glycol, a hydrocarbon group having 12 carbon atoms or more, and a titanium element.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: June 23, 2020
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoko Tamura, Tadahiro Ozawa, Akifumi Kondo, Takahiro Mori
  • Patent number: 10642178
    Abstract: A toner comprising a toner particle including a binder resin and a crystalline polyester resin, wherein the binder resin is an amorphous polyester resin having a linear alkyl group at a molecular chain terminal; the crystalline polyester resin is a polycondensate of a diol and a dicarboxylic acid; the number of carbon atoms CaPES of the linear alkyl group, the number of carbon atoms COH of the diol, and the number of carbon atoms CAc of the dicarboxylic acid, excluding carbon that belongs to carboxyl groups, satisfy the following relationships; and a glass transition temperature of the toner as measured by a differential scanning calorimeter is from 40.0° C. to 55.0° C. 8?CaPES?20??(1) CAc/COH?3.5 and 0?|CAc?CaPES|?3??(2) COH/CAc?3.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: May 5, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Yamashita, Yuichi Mizo, Koh Ishigami, Masaharu Miura, Takaho Shibata, Takeshi Ohtsu, Yosuke Iwasaki, Wakiko Katsumata, Hitoshi Sano, Kenta Mitsuiki, Takakuni Kobori, Rei Hijikawa
  • Patent number: 10571820
    Abstract: A white toner for electrostatic latent image development includes toner particles containing a binder resin, a white pigment, and a release agent, the binder resin containing an amorphous resin. In viscosity measurement using a capillary viscometer, a temperature-viscosity curve has a minimum value within a temperature range of 70° C. or more and 95° C. or less.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: February 25, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Daisuke Noguchi, Yoshimasa Fujihara, Kazutsuna Sasaki
  • Patent number: 10564558
    Abstract: The electrostatic charge image developing toner of the present invention is an electrostatic charge image developing toner including a toner mother particle including at least a binding resin, and an external additive attached onto a surface of the toner mother particle, wherein a median size on a volume basis of the toner mother particle is in the range from 3.0 to 5.0 ?m, the binding resin contains at least an amorphous polyester resin as a main component, and a spherical silica particle (1) having a number average particle size in the range from 20 to 55 nm is included as the external additive.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: February 18, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kouji Sugama, Kazumi Oura, Masaharu Matsubara, Ikuko Sakurada
  • Patent number: 10545421
    Abstract: Provided is a toner including at least: a non-crystalline polyester resin; and a crystalline polyester resin, wherein when a cross-section of the toner is observed, the crystalline polyester resin has a maximum length of 100 nm or greater but less than 500 nm, and a ratio Dv/Dn of a volume average diameter Dv of the crystalline polyester resin to a number average diameter Dn of the crystalline polyester resin is less than 1.20.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: January 28, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuka Mizoguchi, Hiroshi Yamashita, Ryota Inoue, Taichi Nemoto, Shizuka Hashida
  • Patent number: 10539896
    Abstract: A toner composition including an amorphous polyester resin; a crystalline polyester resin; a styrene acrylate copolymer; an optional wax; and an optional colorant; wherein the amorphous polyester resin comprises a rosin monomer content of from about 10 to about 25 percent rosin monomer based upon the total amount of monomer comprising the amorphous polyester resin. A toner composition including a core and at least one shell disposed thereover. A toner process including contacting an amorphous polyester resin; a crystalline polyester resin; a styrene acrylate copolymer; an optional wax; an optional colorant; and an optional aggregating agent; wherein the amorphous polyester resin comprises a rosin monomer content of from about 10 to about 25 percent rosin monomer heating to form aggregated toner particles; optionally, adding a shell resin to the aggregated toner particles, heating to coalesce the particles; and recovering the toner particles.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: January 21, 2020
    Assignee: Xerox Corporation
    Inventors: Kimberly D. Nosella, Guerino G. Sacripante, Edward G. Zwartz, Michael Steven Hawkins
  • Patent number: 10539895
    Abstract: An image forming apparatus includes an image carrier that includes a conductive substrate, and a photosensitive layer and a surface protection layer; a developing device that includes an electrostatic image developer containing a toner, and develops the electrostatic image to form a toner image. The toner contains an amorphous polyester resin and has a weight average molecular weight Mw in a range of from 25,000 to 60,000, and a ratio of the weight average molecular weight Mw to a number average molecular weight Mn (Mw/Mn) is in a range of from 5 to 10. In the toner, a ratio of an absorbance for a wavelength of 1500 cm?1 to an absorbance for a wavelength of 720 cm?1 is 0.6 or less, and a ratio of an absorbance for a wavelength of 820 cm?1 to the absorbance for a wavelength of 720 cm?1 is 0.4 or less.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: January 21, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Makoto Kamisaki, Naoki Ota, Tatsuhiro Igarashi, Yasuhisa Morooka, Jun Sekiya
  • Patent number: 10495995
    Abstract: An image forming apparatus includes an image holding member; a charging unit; an electrostatic image forming unit; a developing unit; a transfer unit; and a fixing unit that fixes the toner image on the recording medium. The toner has an amorphous polyester resin and has a weight-average molecular weight Mw in a range of 25,000 to 60,000, a ratio Mw/Mn is within a range of 5 to 10, a ratio of an absorbance at a wavenumber of 1500 cm?1 to an absorbance at a wavenumber of 720 cm?1 is 0.6 or less, and a ratio of an absorbance at a wavenumber of 820 cm?1 to the absorbance at a wavenumber of 720 cm?1 is 0.4 or less. The fixing unit includes a heat roll having an elastic component, an endless belt and a pressure pad that is disposed on an inner side of the endless belt.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: December 3, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yasuhisa Morooka, Naoki Ota, Makoto Kamisaki, Tatsuhiro Igarashi, Jun Sekiya
  • Patent number: 10488774
    Abstract: An image forming apparatus including a developing device and a fixing device is provided. The fixing device includes a fixing rotator having a fixing surface, an opposing rotator opposing the fixing rotator to form a nip portion therebetween, and a fixing surface reformer having an abutting layer to abut the fixing surface. The abutting layer contains abrasive grains having an average grain size of 2.0-6.5 ?m on a surface which abuts the fixing surface. The toner comprises a crystalline polyester resin and exhibits G? (storage elastic modulus) of 1.0×107 Pa or lower at 70° C. in a temperature rising in a viscoelasticity measurement, G? of 1.0×107 Pa or higher at 70° C. in a temperature falling in the viscoelasticity measurement, and an endothermic peak indicating an amount of heat absorption of from 2.0 to 8.0 J/g, derived from the crystalline polyester resin, in a first temperature rising in DSC.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: November 26, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Inoue, Takahiro Honda, Masami Okamoto, Kenta Kashiwagi, Kaori Hemmi, Yoshihisa Hara
  • Patent number: 10466605
    Abstract: An electrostatic charge image developing toner includes toner particles that contain a polyester resin which includes a condensed polymer of a polyvalent carboxylic acid and a polyol which contains ethylene glycol in an amount of from about 40% by weight to about 90% by weight with respect to a total amount of the polyol, and an external additive that contains silica particles in which a product of a volume average particle diameter D50 (nm) and a BET specific surface area SA (m2/g) is from about 1.4×103 to about 5.0×103.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: November 5, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Narumasa Sato, Kotaro Yoshihara, Daisuke Ishizuka, Takahisa Tatekawa, Noriyuki Mizutani, Erina Saito
  • Patent number: 10451986
    Abstract: According to the present invention, in a toner including a toner particle containing a binder resin and a low molecular aromatic hydrocarbon, the binder resin contains a polyester resin, at least one kind of a unit derived from an aromatic monocarboxylic acid and a unit derived from an aromatic monoalcohol is contained, and the low molecular aromatic hydrocarbon has 1 or more and 4 or less benzene rings, and has a melting point of 60° C. or more and 120° C. or less.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: October 22, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hitoshi Sano, Takeshi Hashimoto, Masayuki Hama, Ichiro Kanno, Yuto Onozaki, Akifumi Matsubara, Megumi Ikeda, Nozomu Komatsu, Takakuni Kobori, Hiroyuki Fujikawa
  • Patent number: 10423089
    Abstract: A positively chargeable toner includes a plurality of toner particles. The toner particles each contain a crystalline polyester resin, a non-crystalline polyester resin, a carnauba wax, and a quaternary ammonium salt. The crystalline polyester resin has an SP value of at least 10.0 (cal/cm3)1/2 and no greater than 10.1 (cal/cm3)1/2. An amount of the crystalline polyester resin is at least 5 parts by mass and no greater than 19 parts by mass relative to 100 parts by mass of the toner particles. An amount of the carnauba wax is at least 21.0% by mass and no greater than 42.0% by mass relative to a total mass of the crystalline polyester resin, the quaternary ammonium salt, and the carnauba wax.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: September 24, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Masaki Okita
  • Patent number: 10401748
    Abstract: A toner comprises a toner particle containing an amorphous polyester, wherein the amorphous polyester contains an amorphous polyester 1, the amorphous polyester contains a tin compound and a titanium compound, a Sn/Ti abundance ratio between Sn and Ti in the amorphous polyester according to x-ray fluorescence analysis is 20/80 to 80/20, and a weight-average molecular weight Mw1 of the amorphous polyester 1 according to measurement by gel permeation chromatography (GPC) is Mw1<7,000.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: September 3, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takeshi Hashimoto, Nozomu Komatsu, Yuto Onozaki, Akifumi Matsubara, Ichiro Kanno, Hitoshi Sano, Tsubasa Fujisaki, Masayuki Hama, Takakuni Kobori, Hiroyuki Fujikawa
  • Patent number: 10394145
    Abstract: A toner for electrophotography obtained by a method including: step 1: mixing a polyester and a polylactic acid at a temperature of 140° C. or higher and 200° C. or lower and subjecting the mixture to a transesterification reaction to provide a resin composition; and step 2: mixing the resin composition obtained in step 1 with a polyester which is identical to and/or different from the polyester of step 1, and a method for producing the toner. The toner for electrophotography of the present invention is suitably used in developing latent images formed in an electrophotographic method, an electrostatic recording method, an electrostatic printing method, or the like.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: August 27, 2019
    Assignee: Kao Corporation
    Inventors: Shogo Watanabe, Kunihiro Kano
  • Patent number: 10345728
    Abstract: A toner for electrophotography containing a resin binder containing a crystalline composite resin C and an amorphous polyester A and an ester wax, wherein the crystalline composite resin C is a resin containing a polycondensation resin component and a styrenic resin component, wherein the polycondensation resin component is obtained by polycondensing an alcohol component containing an aliphatic diol having 9 or more carbon atoms and 14 or less carbon atoms, and a carboxylic acid component containing an aliphatic dicarboxylic acid compound having 9 or more carbon atoms and 14 or less carbon atoms, wherein a mass ratio of the amorphous polyester A to the crystalline composite resin C (amorphous polyester A/crystalline composite resin C) is 60/40 or more and 95/5 or less, and wherein a mass ratio of the crystalline composite resin C to the ester wax (crystalline composite resin C/ester wax) is 0.5 or more and 9 or less.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: July 9, 2019
    Assignee: Kao Corporation
    Inventors: Hideaki Kondo, Kohei Katayama, Kouta Ijichi, Hiroki Kakiuchi
  • Patent number: 10324390
    Abstract: A toner is provided. The toner includes a resin and a fluorine-containing component. The toner satisfies the following formula: 5.0?FXPS/FXRF?25.0 where FXPS (atomic %) represents a content rate of fluorine atom in the toner determined by X-ray photoelectron spectroscopy (XPS) and FXRF (weight %) represents another content rate of fluorine atom in the toner determined by X-ray fluorescence analysis (XRF).
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: June 18, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiro Takeyama, Junichi Watanabe, Takahiro Kadota
  • Patent number: 10310399
    Abstract: Provided is a toner including at least a binder resin, and having peak ratio W/R of from 0.20 to 0.70 when measured with FT-IR according to ATR method, W/R being a ratio of height W of maximum spectral peak attributed to bisphenol A skeleton of the toner and observed at from 1,480 cm?1 to 1,520 cm?1 to height R of maximum spectral peak attributed to carbonyl group of the toner and observed at from 1,700 cm?1 to 1,750 cm?1, wherein molecular weight distribution of the toner obtained by GPC of THF-soluble component of the toner has main peak in a range of from 1,000 to 10,000, half value width of the molecular weight distribution is a molecular weight of 20,000 or less, and content of a THF-insoluble component in the toner is from 5% by mass to 40% by mass.
    Type: Grant
    Filed: November 26, 2015
    Date of Patent: June 4, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Natsuko Matsushita, Tomomi Suzuki, Kohtaroh Ogino, Tohru Moriya
  • Patent number: 10303071
    Abstract: A non-magnetic toner is provided. The non-magnetic toner comprises a polyester resin, a release agent, and a colorant. A storage elastic modulus at 100° C. (G?(100° C.)) of the toner is from 1.0×103 to 1.0×106 Pa, and a storage elastic modulus at 160° C. (G?(160° C.)) of the toner is from 1.0×102 to 1.0×104 Pa. A ratio of loss elastic modulus to storage elastic modulus at 100° C. (tan ?(100° C.)) of the toner is greater than that at 130° C. (tan ?(130° C.)), and the tan ?(100° C.) and the tan ?(130° C.) are each within the range of from 1 to 2.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: May 28, 2019
    Assignee: Richoh Company, Ltd.
    Inventors: Hiroyuki Takeda, Junichi Awamura, Hiroshi Yamada, Akira Tanaka
  • Patent number: 10274851
    Abstract: A toner is provided, which contains a toner particle and a metal titanate particle, wherein, in a number-based particle size distribution of the metal titanate particle on the surface of the toner particle, when D10, D50 and D90 denote the particle diameter at which the cumulative value from the small particle diameter side reaches 10% by number, 50% by number and 90% by number, respectively, the D50 is at least 10 nm and not more than 90 nm, and the particle size distribution index A, which is represented by D90/D10, is at least 2.00 and not more than 10.00, and the value of storage elastic modulus G? at 40° C. in viscoelasticity measurements of the toner is at least 1.0×107 Pa and not more than 1.0×1010 Pa.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: April 30, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takeshi Hashimoto, Masayuki Hama, Yuto Onozaki, Ichiro Kanno, Nozomu Komatsu, Hiroyuki Fujikawa
  • Patent number: 10254669
    Abstract: The present invention relates to a process for producing a toner for development of electrostatic images, including step (1) of mixing a releasing agent and a water dispersion of resin particles (A) to obtain a water dispersion of releasing agent particles; step (2) of mixing the obtained water dispersion of the releasing agent particles and a water dispersion of resin particles (B) to aggregate the releasing agent particles and the resin particles (B), thereby obtaining aggregated particles; and step (3) of coalescing the obtained aggregated particles to obtain coalesced particles, in which the resin particles (A) include a composite resin including a segment (a1) constituted of a polyester resin and a vinyl-based resin segment (a2) containing a constitutional unit derived from a styrene-based compound; and a resin constituting the resin particles (B) includes a segment (b1) constituted of a polyester resin in an amount of not less than 50% by mass.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: April 9, 2019
    Assignee: KAO CORPORATION
    Inventor: Akitaka Shimizu
  • Patent number: 10254671
    Abstract: A binder resin for toner of the present invention comprising: a polyester resin (A) which contains a constitutional unit derived from isosorbide and has a softening temperature of 120° C. or lower; and a polyester resin (B) different from the polyester resin (A), wherein the binder resin for toner has a hygroscopicity index of 2 or less and contains a tetrahydrofuran-insoluble matter at 5% by mass or less.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: April 9, 2019
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tadahiro Ozawa, Yoko Tamura, Kanako Funabashi
  • Patent number: 10254672
    Abstract: Provided is a means to exhibit excellent low temperature fixability and to improve all of the heat-resistant storage property of a toner, charging uniformity, and transferability under a high temperature and high humidity condition. A toner for developing electrostatic charge image which contains at least a binder resin, in which the binder resin has a core-shell structure having a core portion which contains a hybrid crystalline polyester resin formed by chemical bonds of a crystalline polyester resin unit with an amorphous resin unit other than a polyester resin and an amorphous resin and a shell portion which contains a hybrid amorphous polyester resin formed by chemical bonds of an amorphous polyester resin unit with an amorphous resin unit other than a polyester resin.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: April 9, 2019
    Assignee: KONICA MINOLTA, INC
    Inventors: Noboru Ueda, Shiro Hirano
  • Patent number: 10228629
    Abstract: A toner comprising a toner particle that contains a hybrid resin A and a crystalline polyester resin B, wherein the hybrid resin A has a polyester segment, and a polypropylene glycol segment that has a number-average molecular weight of at least 300, the polyester segment has a structure derived from a condensation reaction between a dicarboxylic acid and a diol, and has an aromatic ring in at least one of the dicarboxylic acid and the diol, and the following condition is satisfied: |SPh?SPc|?|SPp?SPc|<1 where, SPh is SP value of the polyester segment of the hybrid resin A, SPc is SP value of the crystalline polyester resin B, and SPp is SP value of the polypropylene glycol segment of the hybrid resin A.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: March 12, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Junichi Tamura, Hayato Ida, Takaho Shibata, Yuya Chimoto, Kouichirou Ochi, Ryuji Murayama, Daisuke Yamashita, Tomoyo Miyakai, Takashi Hirasa
  • Patent number: 10216110
    Abstract: Provided is a toner binder which attains all of low-temperature fixing properties, gloss, and hot offset resistance and gives a toner that satisfies the flowability, high-temperature storability, charge stability, pulverizability, image strength, flex cracking resistance, and document anti-offset properties. The present invention is a toner binder which comprises a polyester resins and has a surfactant content of 100 ppm or less and in which the THF-insoluble components and the THF-soluble components respectively have a storage modulus (Pa) at 150° C., G?x150, and the storage modulus (Pa) at 150° C., G?y150, which satisfy the following relationships (1) and (2).
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: February 26, 2019
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventors: Masaru Honda, Tsuyoshi Izumi, Hiroshi Odajima, Masashi Minaki
  • Patent number: 10203618
    Abstract: An electrostatic charge image developing toner includes a binder resin and a release agent. A ratio of a crystalline polyester resin to the total amount of a amorphous polyester resin and the crystalline polyester resin is within a range exceeding 40% by mass to 60% by mass. A temperature at which a storage modulus before heat left G? before being left to stand at a temperature of X° C. becomes 1.0×108 Pa is within a range exceeding 45° C. to 55° C. A storage modulus after heat left G? at a temperature of X?° C. at which a value of a ratio of the storage modulus after heat left G? at a temperature of X° C. after being left to stand at the temperature of X° C. for 2 hours to the storage modulus before heat left G? at the temperature of X° C. becomes the maximum is within a range of 1.0×108 to 5.0×108 Pa.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: February 12, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yusuke Takigaura, Takaki Kawamura, Shiro Hirano
  • Patent number: 10197934
    Abstract: A toner having a toner particle containing a binder resin, an amorphous polyester, and a colorant, wherein a softening point of the toner is at least 110° C. and not more than 140° C.; an integrated value f1 for stress of the toner is not more than 10 g·m/sec, as measured using a tack tester, with a temperature for a probe end being 150° C. and a press holding time being 0.01 seconds; and an integrated value f2 for stress of the toner is at least 30 g·m/sec, as measured using a tack tester, with a temperature for a probe end being 150° C. and a press holding time being 0.1 seconds.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: February 5, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takashi Matsui, Naoki Okamoto, Yuujirou Nagashima, Keisuke Tanaka, Shohei Tsuda, Kosuke Fukudome, Takuya Mizuguchi
  • Patent number: 10180634
    Abstract: A chemically prepared multilayered toner composition, according to one example embodiment, includes a core having a first polymer binder, a second polymer binder, a colorant, and a release agent. A first layer is formed around the core wherein the first layer includes the same second polymer binder that is in the toner core. A second layer is formed on the surface of the first layer, wherein the second layer includes a third polymer binder. A borax coupling agent is between the first and second layers. In an embodiment the ratio of the second polymer in the core to second polymer in the first layer is about 50:50. The second layer can also be referred to as a shell that is formed over the toner particle having a center core, first layer and borax coupling agent. In another embodiment, the core does not contain a second polymer binder.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: January 15, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Jing X Sun, Corey Marcus Moran, Cory Nathan Hammond, Aaron Michael Dahlke
  • Patent number: 10146147
    Abstract: To provide a magenta toner for electrostatic charge image development including a crystalline polyester resin and an amorphous resin as a binder resin, which is a means for improving low temperature fixability, scattering properties, GI value, saturation, and light fastness. A magenta toner for electrostatic charge image development including an amorphous resin and a crystalline polyester resin as a binder resin, wherein predetermined quinacridone-based pigment, metal element-containing monoazo pigment, and naphthol AS-based pigment are included as a coloring agent, and the combined content of the quinacridone-based pigment and the metal element-containing monoazo pigment is 50-90% by mass of the total coloring agent.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: December 4, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Takanari Kayamori, Masaharu Matsubara, Naoya Tonegawa, Kouji Izawa, Atsushi Iioka
  • Patent number: 10114304
    Abstract: The toner binder of the present invention contains a crystalline resin (A) and a resin (B) that is a polyester resin or its modified resin, the polyester resin being obtained by reaction of an alcohol component (X) and a carboxylic acid component (Y) as raw materials, wherein a temperature (Tp) of the top of an endothermic peak derived from the crystalline resin (A) as measured by a differential scanning calorimeter (DSC) is in the range of 40° C. to 100° C., and endothermic peak areas S1 and S2 during heating satisfy the following equation. (S2/S1)×100?35??(1) S1 is an area of the endothermic peak derived from the crystalline resin (A) in the first heating process, and S2 is an area of the endothermic peak derived from the crystalline resin (A) in the second heating process, when the toner binder is heated, cooled, and heated.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: October 30, 2018
    Assignee: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Satoshi Utsui, Tomohisa Kato, Eiji Iwawaki, Hiroshi Odajima, Mana Sanpei, Yuko Sugimoto
  • Patent number: 10082743
    Abstract: A toner comprising a toner particle containing a crystalline polyester resin and an amorphous polyester resin, wherein, in a cross-sectional observation of the toner by transmission electron microscopy (TEM), the number-average diameter (D1) of major axis lengths of the crystalline polyester resin dispersed up to a depth of 0.30 ?m from a toner surface is 40 nm to 110 nm, and the number-average diameter (D1) of major axis lengths of the crystalline polyester resin dispersed deeper than 0.30 ?m from the toner surface is 1.25 to 4.00 times the number-average diameter (D1) of the major axis lengths of the crystalline polyester resin dispersed up to a depth of 0.30 ?m from the toner surface.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: September 25, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masayuki Hama, Hideki Kaneko, Takeshi Hashimoto, Ichiro Kanno, Nozomu Komatsu, Takakuni Kobori, Hiroyuki Fujikawa
  • Patent number: 10078284
    Abstract: A developer having low-temperature fixability and storage stability, and capable of prolonging the service life is provided. A toner includes a coloring agent, an amorphous polyester, a crystal line polyester, ester wax containing multiple ester compounds, each having a carbon number selected from 32 to 54, and hydrophobic silica having an average primary particle diameter of 8 to 35 nm. When the ion intensity ratio of each ester compound having a different carbon number is expressed as percentage, the content (a) of the ester compound having a carbon number of (Cn) showing the maximum intensity ratio is from 20 to 55% by weight of the entire ester wax, the sum (g) of the content (e) of the ester compound having a carbon number of (Cn+2) and the content (f) of the ester compound having a carbon number of (Cn+4) satisfies the following formula: 0.065?g/a?0.200.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: September 18, 2018
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Koichi Kuroyama, Tsutomu Katsumata
  • Patent number: 10078278
    Abstract: The present invention relates to a process for producing a toner for development of electrostatic images, including the following steps (1) to (3): Step (1): aggregating resin particles (X) containing a composite resin that contains a segment constituted of a polyester resin (a) obtained by polycondensing an alcohol component containing 80 mol % or more of a propyleneoxide adduct of bisphenol A and a polycarboxylic acid component, and a vinyl-based resin segment containing a constitutional unit derived from a styrene-based compound, in an aqueous medium, to obtain aggregated particles (1); Step (2): aggregating the aggregated particles (1) obtained in the step (1) with resin particles (Y) containing a polyester resin (b) obtained by polycondensing an alcohol component containing 80 mol % or more of an ethyleneoxide adduct of bisphenol A and a polycarboxylic acid component to obtain aggregated particles (2); and Step (3): coalescing the aggregated particles (2) obtained in the step (2).
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: September 18, 2018
    Assignee: KAO CORPORATION
    Inventors: Shoichi Murata, Tomohide Yoshida, Hiroto Hayashi, Motomu Shibata
  • Patent number: 10025212
    Abstract: A toner includes toner particles and an external additive; the external additive includes an external additive A containing fine particles of a crystalline resin or fine particles of a wax; the crystalline resin and the wax each have an urethane bond or an urea bond; and the melting point of the crystalline resin and the melting point of the wax are each from 50° C. to 130° C.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: July 17, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji Nishikawa, Shuhei Moribe, Daisuke Yoshiba, Kosuke Fukudome, Shotaro Nomura, Atsuhiko Ohmori, Katsuhisa Yamazaki
  • Patent number: 10012919
    Abstract: A toner comprising a toner particle containing a binder resin, a colorant, an amorphous polyester, and a crystalline polyester, wherein the binder resin contains a vinyl resin; the amorphous polyester has a monomer unit derived from a linear aliphatic dicarboxylic acid having 6 to 12 carbons, and a monomer unit derived from a dialcohol; the content of the monomer unit derived from a linear aliphatic dicarboxylic acid having 6 to 12 carbons is 10 to 50 mol % with reference to the total monomer units derived from a carboxylic acid in the amorphous polyester; and in a cross section of the toner particle, the vinyl resin constitutes a matrix and the amorphous polyester constitutes domains, and the crystalline polyester is present in the interior of the domains.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: July 3, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takashi Matsui, Yuujirou Nagashima, Keisuke Tanaka, Shohei Tsuda, Naoki Okamoto
  • Patent number: 10012920
    Abstract: An object of the present invention is to provide a toner that exhibits high levels of the low-temperature fixability, storability, and charging performance all at the same time. The toner of the present invention is a toner that has a toner particle comprising a crystalline resin and an amorphous resin, the toner being characterized in that the toner satisfies 0.00?(Wt2/Wt1)?0.50; the toner particle has a matrix-domain structure in which domains of the crystalline resin are present in a matrix of the amorphous resin; at least 90 number % of the crystalline resin domains are domains with a diameter from 0.05 ?m to 0.50 ?m; and SF1 for the crystalline resin domains is from 100 to 130.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: July 3, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takaho Shibata, Hayato Ida, Junichi Tamura, Yuya Chimoto, Ryuji Murayama
  • Patent number: 10007200
    Abstract: Core-shell toner particles with antimicrobial properties are described, the toner particles contain a metal ion nanoparticle in the shell.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: June 26, 2018
    Assignee: Xerox Corporation
    Inventors: Valerie M Farrugia, Alana R Desouza, Sandra J Gardner, Kimberly D Nosella