Patents by Inventor Hayato Ida
Hayato Ida has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11914325Abstract: A toner comprising a toner particle comprising a binder resin and a wax, wherein the binder resin comprises an amorphous polyester resin and a polymer A, contents of the amorphous polyester resin and the polymer A in the binder resin are within specific ranges, the polymer A comprises a first monomer unit in which ester (meth)acrylates comprising 18 to 36 carbon atoms are polymerized, a content ratio of the first monomer unit in the polymer A is within specific range, the toner comprises a matrix-domain structure comprising a matrix comprising the amorphous polyester resin and domains, and the domains comprise a domain A comprising at least 80 mass % of the polymer A and a domain B comprising at least 80 mass % of the wax.Type: GrantFiled: March 1, 2021Date of Patent: February 27, 2024Assignee: CANON KABUSHIKI KAISHAInventors: Takeshi Hashimoto, Kentaro Kamae, Takeshi Ohtsu, Hayato Ida
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Publication number: 20240061356Abstract: The fine particle is a silicon-containing fine particle, wherein the number-average diameter of the fine particle is 0.05 ?m to 0.30 ?m; the proportion of the silicon atom with reference to the total of the elements is at least 20% according to fluorescent x-ray measurement of the fine particle; and, with respect to the silicon atom proportions measured in analysis by x-ray photoelectron spectroscopy while irradiating with Ar-K? radiation and etching, the proportions of silicon atoms having prescribed structures vary at prescribed depths.Type: ApplicationFiled: August 8, 2023Publication date: February 22, 2024Inventors: ICHIRO KANNO, HIROKI WATANABE, MARI KABURAGI, HAYATO IDA
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Publication number: 20240004324Abstract: A yellow toner including a toner particle including a binder resin, a crystalline resin, and C.I. Pigment Yellow 180, a content of the C.I. Pigment Yellow 180 is 3% by mass or more and 15% by mass or less with respect to a mass of the toner, the C.I. Pigment Yellow 180 is in a form of plate-like particles each having a plate-like shape, and when the C.I. Pigment Yellow 180 is observed with a scanning electron microscope, the plate-like particles of the C.I. Pigment Yellow 180 satisfy the following relationships: S/Z?10.0; and 50?S?300, where the S (nm) represents a number average of circle-equivalent diameters calculated from areas of surfaces having largest areas of the plate-like particles, and the Z (nm) represents a number average of widths in directions perpendicular to the surfaces having the largest areas of the plate-like particles.Type: ApplicationFiled: June 14, 2023Publication date: January 4, 2024Inventors: KOUICHIROU OCHI, MASAYUKI HAMA, HAYATO IDA
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Patent number: 11835873Abstract: A toner has a toner particle containing a binder resin having a first resin and a second resin. The first resin is a crystalline resin, the second resin is an amorphous resin, and the first resin has a first monomer unit, a second monomer unit and a third monomer unit, each having a specific structure. A content of the first monomer unit a content of the third monomer unit in the first resin, and an SP value of the second monomer unit all satisfy a specific ranges, and the second resin contains at least one vinyl-based resin and/or specific hybrid resin, with a cross section of the toner having a domain-matrix structure formed of a matrix including the first resin and domains including the second resin, a number average diameter of the domains being 0.10 to 2.00 ?m.Type: GrantFiled: December 9, 2020Date of Patent: December 5, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Takeshi Hashimoto, Kentaro Kamae, Ichiro Kanno, Hayato Ida
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Patent number: 11809131Abstract: A toner comprising a toner particle that contains a binder resin and a wax, wherein the binder resin contains an amorphous polyester resin, a polymer A, and a component B, a content of the amorphous polyester resin in the binder resin is at least 50.0 mass %, the polymer A has first monomer units represented by Formula (C) below and second monomer units, RZ3 represents a hydrogen atom or a methyl group, R represents a C18 to C36 alkyl group, a content ratio of the first monomer units in the polymer A is from 5.0 mol % to 60.0 mol %, an SP value of the second monomer units is at least 21.00, a content of the polymer A in the binder resin is from 0.10 mass % to 10.00 mass %, and SP values of the amorphous polyester resin, the polymer A, the component B and the wax satisfy specific relationships.Type: GrantFiled: March 2, 2021Date of Patent: November 7, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Kentaro Kamae, Takeshi Hashimoto, Takeshi Ohtsu, Hayato Ida
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Publication number: 20230314972Abstract: A toner, comprising a toner particle comprising a binder resin, wherein in a viscoelasticity measurement performed on a molded sample resulting from compression molding of the toner to a disc shape, and in which a strain in the molded sample is caused to vary, at 90° C., a storage elastic modulus G?(1) of the molded sample at 1% strain is 7500 to 30000 Pa, and a storage elastic modulus G?(50) of the molded sample at 50% strain is 950 to 6000 Pa.Type: ApplicationFiled: March 24, 2023Publication date: October 5, 2023Inventors: TAKESHI HASHIMOTO, MEGUMI SHINO, HAYATO IDA
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Publication number: 20230305419Abstract: A two component developer comprising a toner and a specific magnetic carrier, wherein a toner particle in the toner comprises a surface layer comprising an organosilicon polymer, electrical conductivity of a filtrate obtained by filtering off the toner using a specific procedure is 1.0 to 2.5 ?S/cm, and when dC (atomic %) denotes carbon concentration, dO (atomic %) denotes oxygen concentration and dSi (atomic %) denotes silicon concentration, as measured by ESCA, at the surface of the toner particle, then the dC, the dO and the dSi satisfy the following formulae: 40.0?dC/(dC+dO+dSi)×100?60.0 10.0?dSi/(dC+dO+dSi)×100?26.0.Type: ApplicationFiled: March 13, 2023Publication date: September 28, 2023Inventors: HIROKI WATANABE, ICHIRO KANNO, MARI KABURAGI, HAYATO IDA
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Publication number: 20230257526Abstract: The present disclosure provides a fine particle containing silicon, wherein the fine particle has a number-average particle diameter of a primary particle of 0.05 ?m or more and 0.20 ?m or less, wherein the fine particle contains a silicon atom at a ratio of 20% or more with respect to all elements in measurement by X-ray fluorescence.Type: ApplicationFiled: February 14, 2023Publication date: August 17, 2023Inventors: ICHIRO KANNO, HAYATO IDA, HIROKI WATANABE, MARI KABURAGI
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Patent number: 11714362Abstract: A toner having: a toner particle containing a binder resin including a first resin and a second resin; and an inorganic fine particle on a surface of the toner particle, wherein the first resin has a specific content ratio of a specific monomer unit, acid values of the first unit and second unit are within specific ranges, a domain matrix structure including a matrix containing the first resin and domains containing the second resin appears in cross-sectional observation of the toner, a compound having an alkyl group is present on a surface of the inorganic fine particle, and a volume resistivity of the inorganic fine particle is 1.0×105 ?·cm to 1.0×1013 ?·cm.Type: GrantFiled: December 10, 2020Date of Patent: August 1, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Ichiro Kanno, Takeshi Hashimoto, Kentaro Kamae, Hayato Ida
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Patent number: 11675283Abstract: A magnetic carrier including a magnetic carrier particle having a magnetic core particle and a coating layer of an organosilicon polymer on a surface of the magnetic core particle, wherein the organosilicon polymer has the structure given by formula (T3) below; in 29Si-NMR measurement of the THF-insoluble matter of the organosilicon polymer, the ratio ST3 of the peak area for the structure given by formula (T3) to the total peak area for the organosilicon polymer is at least 0.05; and in the roughness curve measured on the magnetic carrier particle, the mean width (RSm) of the roughness curve elements of the magnetic carrier particle, and the ratio (?/RSm) to this RSm of the standard deviation ? of the width of the region where one period of a protrusion and a recess occurs, are in prescribed ranges. R—Si(O1/2)3??(T3) R in the formula represents a prescribed substituent.Type: GrantFiled: November 9, 2020Date of Patent: June 13, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Kentaro Kamae, Kazuhisa Shirayama, Takeshi Hashimoto, Takeshi Ohtsu, Hayato Ida
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Patent number: 11662670Abstract: A toner having: a toner particle containing a binder resin including a first resin that is a crystalline resin and a second resin that is an amorphous resin; and a fine particle on a surface of the toner particle, wherein the first resin contains a specific ratio of a specific monomer unit, an acid value of the first resin and an acid value of the second resin arc within specific ranges, a domain-matrix structure formed of a matrix containing the first resin and domains containing the second resin appears in cross -sectional observation of the toner, and the fine particle has on the surface a compound containing nitrogen atoms bound or adsorbed thereon.Type: GrantFiled: December 11, 2020Date of Patent: May 30, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Masayuki Hama, Ichiro Kanno, Kentaro Kamae, Takeshi Hashimoto, Hayato Ida
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Publication number: 20230152725Abstract: A toner comprising a toner particle comprising an organic pigment and a binder resin, wherein, in a solid-state NMR measurement at 60° C. using a solid fraction obtained by specific procedure for dissolving the toner in chloroform as a sample, a transverse relaxation time T2 of a peak observed between 1.5 and 2.5 ppm is from 0.08 to 0.13 ms.Type: ApplicationFiled: November 8, 2022Publication date: May 18, 2023Inventors: Kouichirou Ochi, Masayuki Hama, Yuka Gunji, Hayato Ida, Kaoru Yoshida
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Patent number: 11624986Abstract: A toner is provided, which has a toner particle containing a binder resin including a first resin and a second resin, wherein the first resin is a crystalline resin, the second resin is an amorphous resin, the first resin contains a specific amount of a first monomer unit having a specific structure, an acid value of the first resin and an acid value of the second resin are within specific ranges, a domain-matrix structure formed of a matrix containing the first resin and domains containing the second resin appears in cross-sectional observation of the toner, the toner particle contains a multivalent metal element, the multivalent metal element is at least one metal element selected from the group consisting of Mg, Ca, Al, Fe and Zn, and a total content of the multivalent metal element is within a specific range.Type: GrantFiled: December 10, 2020Date of Patent: April 11, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Ichiro Kanno, Takeshi Hashimoto, Kentaro Kamae, Hayato Ida
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Publication number: 20230086689Abstract: A fine particle of a silicon polymer, wherein the fine particle has pores; the total pore volume of the fine particle is 0.35 to 1.00 cm3/g; a number-average primary particle diameter of the fine particle is 0.05 to 0.30 ?m; the silicon polymer has a siloxane bond and an Si—R1 bond; R1 represents an alkyl group having 1 to 6 carbon atoms; and designating, with reference to a chart obtained by 29Si-NMR measurement of the fine particle, A as a total peak area corresponding to the silicon polymer, and B as a peak area corresponding to Si—R1, A and B satisfy a following formula (1): 10.0?B/A×100?45.0 ??(1).Type: ApplicationFiled: August 31, 2022Publication date: March 23, 2023Inventors: Ichiro Kanno, Hiroki Watanabe, Masaharu Miura, Hayato Ida
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Publication number: 20220413406Abstract: Provided is a toner comprising: a toner particle containing a binder resin; and an organic silicon polymer particle on a surface of the toner particle, wherein the binder resin contains a crystalline resin, and when the toner particle is pelletized and a Young's modulus of the toner measured in a micro compression test at 25° C. is represented by TE (MPa) and when one organic silicon polymer particle is separated from the toner and a Young's modulus of the one organic silicon polymer particle measured in a micro compression test at 25° C. is represented by SiE (MPa), TE and SiE satisfies 800?TE?2500 and 1.5?SiE/TE?10.0.Type: ApplicationFiled: May 19, 2022Publication date: December 29, 2022Inventors: Megumi Shino, Takeshi Hashimoto, Yukihiro Abe, Miki Ueda, Hayato Ida, Kazuki Murata
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Publication number: 20220404727Abstract: A toner comprising a toner particle containing a binder resin and an inorganic fine particle, wherein the binder resin contains a crystalline resin, the crystalline resin has a first monomer unit represented by the following formula (1), the inorganic fine particle is at least one inorganic fine particle selected from the group consisting of a particle containing CaCO3, a particle containing BaSO4, a particle containing Mg3Si4O10(OH)2, and a particle containing Al2Si2O5(OH)4, the inorganic fine particle is treated with a fatty acid, and a content B of the inorganic fine particle in the toner particle is 1.0 mass % or more to 15.0 mass % or less, wherein RZ1 represents a hydrogen atom or a methyl group, and R1 represents an alkyl group having 18 to 36 carbon atoms.Type: ApplicationFiled: May 18, 2022Publication date: December 22, 2022Inventors: Miki Ueda, Takeshi Hashimoto, Kazuki Murata, Megumi Shino, Yukihiro Abe, Hayato Ida
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Publication number: 20220342335Abstract: A toner comprising a toner particle comprising a colorant, a binder resin, and calcium carbonate particles, wherein an amount of the colorant in the toner particle is from 1.0 to 20.0% by mass; the binder resin comprises a polyester resin; the polyester resin has an aromatic ring concentration of from 50 to 70 mol %; a surface of the calcium carbonate particles is coated with a fatty acid; an amount of the calcium carbonate particles in the toner particle is from 1.0 to 15.0% by mass; a number average particle diameter of the calcium carbonate particles is from 150 nm to 800 nm.Type: ApplicationFiled: April 13, 2022Publication date: October 27, 2022Inventors: Kouichirou Ochi, Masayuki Hama, Hayato Ida, Yuya Chimoto, Hisasuke Kajihara
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Publication number: 20220326630Abstract: A toner comprising a toner particle comprising a binder resin, wherein the binder resin comprises a first resin and a second resin, the first resin is a crystalline resin, the second resin is an amorphous resin, and in observations of cross sections of 100 toner particles using a transmission electron microscope, (i) when an area ratio A (area %) denotes a ratio of an area occupied by the first resin in each of cross sections of the toner particles, an average value of the area ratio A is 30 to 75 area %, and (ii) when X denotes the number of cross sections of the toner particle for which the area ratio A is 90 area % or more and Z denotes the total number of cross sections of observed toner particles, then a value of X/Z is 0.15 or more.Type: ApplicationFiled: March 24, 2022Publication date: October 13, 2022Inventors: Takeshi Hashimoto, Kazuki Murata, Yukihiro Abe, Miki Ueda, Hayato Ida
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Publication number: 20220299901Abstract: A toner comprising a toner particle comprising a binder resin, wherein the binder resin comprises a first resin and a second resin, the first resin is a crystalline resin, the second resin is an amorphous resin, in an observation of a cross section of the toner particle with a transmission electron microscope, a matrix-domain structure composed of a matrix comprising the first resin and domains comprising the second resin is present, an area ratio occupied by the matrix in a total area of the matrix and the domains is from 35 area % to 70 area %, a [hydrocarbon group index (Ge)]/[hydrocarbon group index (DIA)] after washing the toner with hexane is 1.10 or more.Type: ApplicationFiled: March 11, 2022Publication date: September 22, 2022Inventors: Kazuki Murata, Takeshi Hashimoto, Yukihiro Abe, Miki Ueda, Hayato Ida
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Publication number: 20220299902Abstract: A toner comprising a toner particle comprising a binder resin and a release agent, wherein the binder resin comprises a first resin and a second resin; the first resin is a crystalline resin having a melting point Tp of 50° C. to 90° C.; the second resin is an amorphous resin; in a cross section of the toner particle observed by a transmission electron microscope, the cross section of the toner particle has a matrix-domain structure composed of a matrix comprising the first resin and domains comprising the second resin; an area ratio of the matrix comprising the first resin in a total area of the cross section of the toner particle is 35 to 70 area %; and where a longest direction of each of the domains is taken as a longitudinal direction, a standard deviation of an angle of the longitudinal direction of the domains is 25° or less.Type: ApplicationFiled: March 11, 2022Publication date: September 22, 2022Inventors: Yukihiro Abe, Takeshi Hashimoto, Kazuki Murata, Miki Ueda, Hayato Ida