Patents by Inventor Takashige Kasuya
Takashige Kasuya 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).
-
Patent number: 10078280Abstract: A method for producing a toner particle include: (a) mixing a binder resin A, resin fine particles containing a resin B, a resin C, an organic solvent, and carbon dioxide, thereby forming a droplet of a resin solution containing the binder resin A, covered with the resin fine particles; (b) applying a pressure by introducing carbon dioxide, thereby precipitating the resin C at the surface of the droplet; and (c) passing carbon dioxide so as to remove the organic solvent from the droplet with the carbon dioxide. The resin C has an organic polysiloxane structure and a weight average molecular weight of 50,000 to 500,000. The ratio of the weight average molecular weight to the number average molecular weight of the resin C is not more than 5.0. The proportion of the resin C to the rein fine particles is 5.0% by mass to 50.0% by mass.Type: GrantFiled: June 14, 2017Date of Patent: September 18, 2018Assignee: Canon Kabushiki KaishaInventors: Kenji Aoki, Yusuke Kosaki, Noritaka Toyoizumi, Tetsuya Kinumatsu, Toshifumi Mori, Sakae Suda, Shinnosuke Koji, Shuntaro Watanabe, Kazumichi Nakahama, Atsushi Tani, Takashige Kasuya
-
Patent number: 9964876Abstract: A toner includes toner particles which contain a binder resin, a colorant, a wax, and a resin A having an organic polysiloxane structure; the amount of Si atoms of the toner particles is 4.5 to 10.0; in an analysis of a cross-section of each toner particle, in a surface layer region R from the periphery of the cross-section of the toner particle to the inside at a distance of 10.0% of the particle diameter in the cross-section of the toner particle, the content of Si atoms derived from the organic polysiloxane structure is 90.0% or more with respect to the total amount of Si atoms contained in the toner particle; and in a line analysis along a straight line between the periphery of the surface layer region R and a gravity center of the cross-section, an intensity count of Si atoms in the toner particle satisfies formula Si0>Si1>Si2>Si3?0.Type: GrantFiled: July 24, 2017Date of Patent: May 8, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Noritaka Toyoizumi, Yusuke Kosaki, Tetsuya Kinumatsu, Kenji Aoki, Toshifumi Mori, Sakae Suda, Shinnosuke Koji, Shuntaro Watanabe, Kazumichi Nakahama, Atsushi Tani, Takashige Kasuya
-
Publication number: 20180031988Abstract: A toner includes toner particles which contain a binder resin, a colorant, a wax, and a resin A having an organic polysiloxane structure; the amount of Si atoms of the toner particles is 4.5 to 10.0; in an analysis of a cross-section of each toner particle, in a surface layer region R from the periphery of the cross-section of the toner particle to the inside at a distance of 10.0% of the particle diameter in the cross-section of the toner particle, the content of Si atoms derived from the organic polysiloxane structure is 90.0% or more with respect to the total amount of Si atoms contained in the toner particle; and in a line analysis along a straight line between the periphery of the surface layer region R and a gravity center of the cross-section, an intensity count of Si atoms in the toner particle satisfies formula Si0>Si1>Si2>Si3?0.Type: ApplicationFiled: July 24, 2017Publication date: February 1, 2018Inventors: Noritaka Toyoizumi, Yusuke Kosaki, Tetsuya Kinumatsu, Kenji Aoki, Toshifumi Mori, Sakae Suda, Shinnosuke Koji, Shuntaro Watanabe, Kazumichi Nakahama, Atsushi Tani, Takashige Kasuya
-
Patent number: 9869943Abstract: A method of producing a toner containing a toner particle, including the steps of: a) preparing a resin solution by mixing a resin A and an organic solvent, b) mixing the resin solution, a resin fine particle containing a resin B, and a dispersion medium to form a droplet of the resin solution whose surface has been covered with the resin fine particle, and c) removing the organic solvent in the droplet, in which the resin B is a polymer of a monomer composition containing a monomer X having polymerizable unsaturated groups at the both ends; the monomer X has a peak molecular weight of 5,000 to 50,000; the content of the monomer X is 0.10% to 3.00% by mol; and the following formula (1) is satisfied, |SPX?SPA|?2.0??(1) where SPA and SPX represent solubility parameters of the resin A and the monomer X, respectively.Type: GrantFiled: October 12, 2016Date of Patent: January 16, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Kenji Aoki, Yusuke Kosaki, Tetsuya Kinumatsu, Shuntaro Watanabe, Noritaka Toyoizumi, Atsushi Tani, Takashige Kasuya
-
Patent number: 9857713Abstract: Provided is a toner, comprising a toner particle having a core-shell structure composed of a core particle and a shell phase on a surface of the core particle, the core particle containing a resin X and a colorant, the shell phase being derived from a resin fine particle containing a resin Y, in which a relationship among a SP value of the resin X, a SP value of the resin Y, and a SP value of an organic solvent falls within a specific range, and a relationship between a number-average particle diameter of the resin fine particle when the resin fine particle is dispersed in water and a number-average particle diameter of the resin fine particle when the resin fine particle is dispersed in the organic solvent falls within a specific range.Type: GrantFiled: December 17, 2015Date of Patent: January 2, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Yusuke Kosaki, Tetsuya Kinumatsu, Kenji Aoki, Noritaka Toyoizumi, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Takashige Kasuya, Kazumichi Nakahama, Shinnosuke Koji
-
Publication number: 20170363979Abstract: A method for producing a toner particle include: (a) mixing a binder resin A, resin fine particles containing a resin B, a resin C, an organic solvent, and carbon dioxide, thereby forming a droplet of a resin solution containing the binder resin A, covered with the resin fine particles; (b) applying a pressure by introducing carbon dioxide, thereby precipitating the resin C at the surface of the droplet; and (c) passing carbon dioxide so as to remove the organic solvent from the droplet with the carbon dioxide. The resin C has an organic polysiloxane structure and a weight average molecular weight of 50,000 to 500,000. The ratio of the weight average molecular weight to the number average molecular weight of the resin C is not more than 5.0. The proportion of the resin C to the rein fine particles is 5.0% by mass to 50.0% by mass.Type: ApplicationFiled: June 14, 2017Publication date: December 21, 2017Inventors: Kenji Aoki, Yusuke Kosaki, Noritaka Toyoizumi, Tetsuya Kinumatsu, Toshifumi Mori, Sakae Suda, Shinnosuke Koji, Shuntaro Watanabe, Kazumichi Nakahama, Atsushi Tani, Takashige Kasuya
-
Patent number: 9823595Abstract: Provided is a toner including toner particle, the toner particle having a core-shell structure having: a core containing a core resin, a colorant, and a wax; and a shell layer containing a resin “A” on a surface of the core, in which: the resin “A” contains a segment having an organopolysiloxane structure; the toner particle has an amount of Si derived from the organopolysiloxane structure of 6.0 or more and 10.0 or less, the amount of Si being measured by X-ray photoelectron spectroscopy; the resin “A” is a polymer of a monomer composition containing a monomer “a” having two or more polymerizable unsaturated groups in one molecule thereof; and the monomer “a” satisfies the following formula (1). (Xa?1.0)×Ya?3.Type: GrantFiled: June 8, 2016Date of Patent: November 21, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Noritaka Toyoizumi, Yusuke Kosaki, Tetsuya Kinumatsu, Kenji Aoki, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Takashige Kasuya
-
Patent number: 9811016Abstract: A toner comprising a toner particle comprising a binder resin that comprises a crystalline resin, wherein the toner satisfies the following formulas (1) and (2) in DSC measurement of the toner, 50.0?Tt?80.0??formula (1) 0.00??HT?t-3/?H?0.20??formula (2) where Tt [° C.] is the peak temperature of the endothermic peak P1, ?H [J/g] is the endothermic quantity from a temperature lower than T?t by 20.0° C. to a temperature higher than T?t by 10.0° C. when T?t [° C.] is the peak temperature of the endothermic peak P 2, and ?H T?t-3 [J/g] is the endothermic quantity from a temperature lower than T?t by 20.0° C. to a temperature lower than T?t by 3.0° C.Type: GrantFiled: March 16, 2016Date of Patent: November 7, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Kenji Aoki, Tetsuya Kinumatsu, Yusuke Kosaki, Shuntaro Watanabe, Noritaka Toyoizumi, Takaaki Kaya, Atsushi Tani, Takashige Kasuya
-
Patent number: 9798256Abstract: A method of producing a toner includes preparing a resin solution containing a binder resin, a colorant and an organic solvent; forming a droplet, a surface of the droplet being covered with a resin fine particle L1; introducing a resin fine particle L2; pressuring by introducing carbon dioxide, and extracting the organic solvent in the droplet; and obtaining the toner particle by removing the carbon dioxide together with the extracted organic solvent, wherein the SP value of the resin R1 constituting the resin fine particle L1 and the SP value of the resin R2 constituting the resin fine particle L2 are each within a specific range.Type: GrantFiled: June 9, 2016Date of Patent: October 24, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Yusuke Kosaki, Noritaka Toyoizumi, Tetsuya Kinumatsu, Kenji Aoki, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Takashige Kasuya
-
Patent number: 9798262Abstract: Provided is a method of producing a toner including the steps of: mixing a resin solution comprising a resin R, a colorant, and an organic solvent, a resin fine particle comprising a resin S containing an element ?, and carbon dioxide to form a droplet having a surface covered with the resin fine particle; introducing carbon dioxide in a liquid state and pressurizing to extract the organic solvent in the droplet; and removing the extracted organic solvent together with the carbon dioxide to provide a toner particle. In the method of producing a toner, when the resin fine particle is treated with the carbon dioxide in a liquid state, a change in amount of the element ? on the surface of the resin fine particle after the treatment as compared to the amount before the treatment falls within a specific range.Type: GrantFiled: December 17, 2015Date of Patent: October 24, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Noritaka Toyoizumi, Yusuke Kosaki, Tetsuya Kinumatsu, Kenji Aoki, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Kazumichi Nakahama, Shinnosuke Koji, Takashige Kasuya
-
Patent number: 9658554Abstract: A method of producing a toner containing a toner particle having a core-shell structure that has a core containing a resin and has a shell phase on a surface of the core, the shell phase being derived from a resin fine particle containing a resin A, and the resin A being a resin containing a segment derived from a crystalline polymer D, the method including steps (i), (ii) and (iii).Type: GrantFiled: March 17, 2016Date of Patent: May 23, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Tetsuya Kinumatsu, Kenji Aoki, Yusuke Kosaki, Noritaka Toyoizumi, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Takashige Kasuya
-
Publication number: 20170123331Abstract: A method of producing a toner containing a toner particle, including the steps of: a) preparing a resin solution by mixing a resin A and an organic solvent, b) mixing the resin solution, a resin fine particle containing a resin B, and a dispersion medium to form a droplet of the resin solution whose surface has been covered with the resin fine particle, and c) removing the organic solvent in the droplet, in which the resin B is a polymer of a monomer composition containing a monomer X having polymerizable unsaturated groups at the both ends; the monomer X has a peak molecular weight of 5,000 to 50,000; the content of the monomer X is 0.10% to 3.00% by mol; and the following formula (1) is satisfied, |SPX?SPA|?2.0??(1) where SPA and SPX represent solubility parameters of the resin A and the monomer X, respectively.Type: ApplicationFiled: October 12, 2016Publication date: May 4, 2017Inventors: Kenji Aoki, Yusuke Kosaki, Tetsuya Kinumatsu, Shuntaro Watanabe, Noritaka Toyoizumi, Atsushi Tani, Takashige Kasuya
-
Patent number: 9625844Abstract: Provided is a toner containing toner particles, each of which includes a binder resin containing a polyester as a main component, a colorant, and a wax, in which the binder resin includes a block polymer in which a segment capable of forming a crystalline structure and a segment incapable of forming a crystalline structure are bonded, the toner has a maximum endothermic peak from the binder resin, as determined by differential scanning calorimetry measurement, with a peak temperature in a specific range and with an endothermic quantity in a specific range, and the wax is an ester wax having a functionality of 3 or more.Type: GrantFiled: April 10, 2014Date of Patent: April 18, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Takaaki Kaya, Tetsuya Kinumatsu, Toshifumi Mori, Ayako Okamoto, Kenji Aoki, Shuntaro Watanabe, Atsushi Tani, Takashige Kasuya
-
Publication number: 20170003610Abstract: A method of producing a toner includes preparing a resin solution containing a binder resin, a colorant and an organic solvent; forming a droplet, a surface of the droplet being covered with a resin fine particle L1; introducing a resin fine particle L2; pressuring by introducing carbon dioxide, and extracting the organic solvent in the droplet; and obtaining the toner particle by removing the carbon dioxide together with the extracted organic solvent, wherein the SP value of the resin R1 constituting the resin fine particle L1 and the SP value of the resin R2 constituting the resin fine particle L2 are each within a specific range.Type: ApplicationFiled: June 9, 2016Publication date: January 5, 2017Inventors: Yusuke Kosaki, Noritaka Toyoizumi, Tetsuya Kinumatsu, Kenji Aoki, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Takashige Kasuya
-
Publication number: 20170003612Abstract: Provided is a toner including toner particle, the toner particle having a core-shell structure having: a core containing a core resin, a colorant, and a wax; and a shell layer containing a resin “A” on a surface of the core, in which: the resin “A” contains a segment having an organopolysiloxane structure; the toner particle has an amount of Si derived from the organopolysiloxane structure of 6.0 or more and 10.0 or less, the amount of Si being measured by X-ray photoelectron spectroscopy; the resin “A” is a polymer of a monomer composition containing a monomer “a” having two or more polymerizable unsaturated groups in one molecule thereof; and the monomer “a” satisfies the following formula (1). (Xa?1.0)×Ya?3.Type: ApplicationFiled: June 8, 2016Publication date: January 5, 2017Inventors: Noritaka Toyoizumi, Yusuke Kosaki, Tetsuya Kinumatsu, Kenji Aoki, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Takashige Kasuya
-
Publication number: 20160291494Abstract: A method of producing a toner containing a toner particle having a core-shell structure that has a core containing a resin and has a shell phase on a surface of the core, the shell phase being derived from a resin fine particle containing a resin A, and the resin A being a resin containing a segment derived from a crystalline polymer D, the method including steps (i), (ii) and (iii).Type: ApplicationFiled: March 17, 2016Publication date: October 6, 2016Inventors: Tetsuya Kinumatsu, Kenji Aoki, Yusuke Kosaki, Noritaka Toyoizumi, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Takashige Kasuya
-
Publication number: 20160282740Abstract: A toner comprising a toner particle comprising a binder resin that comprises a crystalline resin, wherein the toner satisfies the following formulas (1) and (2) in DSC measurement of the toner, 50.0?Tt?80.0??formula (1) 0.00??HT?t-3/?H?0.20??formula (2) where Tt [° C.] is the peak temperature of the endothermic peak P1, ?H [J/g] is the endothermic quantity from a temperature lower than T?t by 20.0° C. to a temperature higher than T?t by 10.0° C. when T?t [° C.] is the peak temperature of the endothermic peak P2, and ?HT?t-3 [J/g] is the endothermic quantity from a temperature lower than T?t by 20.0° C. to a temperature lower than T?t by 3.0° C.Type: ApplicationFiled: March 16, 2016Publication date: September 29, 2016Inventors: Kenji Aoki, Tetsuya Kinumatsu, Yusuke Kosaki, Shuntaro Watanabe, Noritaka Toyoizumi, Takaaki Kaya, Atsushi Tani, Takashige Kasuya
-
Patent number: 9429860Abstract: A method for producing a toner that comprises toner particles, each of which comprises a binder resin, which comprises a resin (A) capable of forming a crystalline structure, and a colorant, the method including: a pressure holding step of, after preparing toner particles, holding the toner particles for 5 minutes or more at a pressure of 2.0 MPa or more under conditions of a temperature T1 (° C.) represented by formula (1): 20?T1?Tp2??(1) (wherein, Tp2 represents the onset temperature of the maximum endothermic peak derived from the resin (A)), wherein a peak temperature Tp1 of the maximum endothermic peak derived from the resin (A) during the first temperature rise of the toner particles as determined by differential scanning calorimetric measurement is 50° C. to 90° C.Type: GrantFiled: May 21, 2014Date of Patent: August 30, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Tetsuya Kinumatsu, Shuntaro Watanabe, Kenji Aoki, Atsushi Tani, Yoshihiro Nakagawa, Takaaki Kaya, Toshifumi Mori, Yusuke Kosaki, Takashige Kasuya
-
Publication number: 20160187798Abstract: Provided is a method of producing a toner including the steps of: mixing a resin solution comprising a resin R, a colorant, and an organic solvent, a resin fine particle comprising a resin S containing an element ?, and carbon dioxide to form a droplet having a surface covered with the resin fine particle; introducing carbon dioxide in a liquid state and pressurizing to extract the organic solvent in the droplet; and removing the extracted organic solvent together with the carbon dioxide to provide a toner particle. In the method of producing a toner, when the resin fine particle is treated with the carbon dioxide in a liquid state, a change in amount of the element ? on the surface of the resin fine particle after the treatment as compared to the amount before the treatment falls within a specific range.Type: ApplicationFiled: December 17, 2015Publication date: June 30, 2016Inventors: Noritaka Toyoizumi, Yusuke Kosaki, Tetsuya Kinumatsu, Kenji Aoki, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Kazumichi Nakahama, Shinnosuke Koji, Takashige Kasuya
-
Publication number: 20160187797Abstract: Provided is a toner, comprising a toner particle having a core-shell structure composed of a core particle and a shell phase on a surface of the core particle, the core particle containing a resin X and a colorant, the shell phase being derived from a resin fine particle containing a resin Y, in which a relationship among a SP value of the resin X, a SP value of the resin Y, and a SP value of an organic solvent falls within a specific range, and a relationship between a number-average particle diameter of the resin fine particle when the resin fine particle is dispersed in water and a number-average particle diameter of the resin fine particle when the resin fine particle is dispersed in the organic solvent falls within a specific range.Type: ApplicationFiled: December 17, 2015Publication date: June 30, 2016Inventors: Yusuke Kosaki, Tetsuya Kinumatsu, Kenji Aoki, Noritaka Toyoizumi, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Takashige Kasuya, Kazumichi Nakahama, Shinnosuke Koji