公开(公告)号：US11899396B2

公开(公告)日：2024-02-13

申请号：US17291138

申请日：2019-11-20

Applicant: KAO CORPORATION

Inventor： Yuka Amaha ,  Yuki Wakabayashi ,  Shogo Watanabe

IPC: G03G5/087 ,  G03G9/087 ,  C08F283/02 ,  C08L51/08 ,  G03G15/08

CPC classification number: G03G9/08786 ,  C08F283/02 ,  C08L51/08 ,  G03G9/08797 ,  G03G15/08 ,  C08L2205/025

Abstract: The invention relates to a toner for development of electrostatic images excellent in fusing property on polypropylene films and excellent in rubfastness of printed images, and a resin composition for a toner for development of electrostatic images. The toner for development of electrostatic images and the resin composition for a toner for development of electrostatic images each contain an amorphous polyester-based resin A and a crystalline polyester-based resin C, wherein the amorphous polyester-based resin A has a constituent moiety derived from a polyester resin, and a constituent moiety derived from a reactive functional group-having modified polyolefin-based polymer A, the polyester resin-derived constituent moiety and the modified polyolefin-based polymer A-derived constituent moiety being bonded via a covalent bond, and the amount of the modified polyolefin-based polymer A-derived constituent moiety is 5% by mass or more and 30% by mass or less relative to the total amount of the resin component in the toner.

公开(公告)号：US10655030B2

公开(公告)日：2020-05-19

申请号：US15738487

申请日：2016-06-24

Applicant: KAO CORPORATION

Inventor： Hirotaka Takeno ,  Yuki Wakabayashi ,  Kaname Mitsuyoshi ,  Takahiro Yoshikawa

IPC: C09D11/40 ,  C09D11/30 ,  B41J2/21 ,  C09D11/033 ,  C09D11/322 ,  C09D11/102 ,  B41M5/00 ,  C09D11/037

Abstract: The present invention relates to a water-based ink including a pigment, a water-insoluble polymer, an organic solvent and a surfactant, in which the organic solvent includes at least a glycol ether which has a viscosity of from 2.0 to 7.0 mPa·s and a vapor pressure from 0.01 to 7.0 hPa as measured at 20° C., and a content of a glycol ether having a viscosity of not less than 6.0 mPa·s as measured at 20° C. as a component of the glycol ether in the water-based ink is from 0 to 5% by mass; the surfactant includes a silicone-based surfactant and a content of the silicone-based surfactant in the water-based ink is from 0.005 to 0.3% by mass; a content of the organic solvent in the water-based ink is from 25 to 50% by mass; and a content of a high-boiling organic solvent in the water-based ink is not more than 5% by mass, an ink set for ink-jet printing including two or more kinds of water-based inks which are each constituted of the aforementioned water-based ink, and an ink-jet printing method including the steps of ejecting the aforementioned water-based ink onto a printing medium, and further ejecting the water-based ink onto the printing medium to overstrike the water-based ink onto the water-based ink that has been ejected onto the printing medium in the previous step. The water-based ink of the present invention is excellent in continuous ejection properties, and is capable of obtaining good printed materials that are free of roller transfer contamination and intercolor bleeding owing to overstriking of the inks even when printed on a non-water absorbing printing medium.

公开(公告)号：US10465083B2

公开(公告)日：2019-11-05

申请号：US15738480

申请日：2016-06-24

Applicant: KAO CORPORATION

Inventor： Yuki Wakabayashi ,  Hirotaka Takeno

IPC: B41J2/01 ,  B41J2/21 ,  C09D11/322 ,  B41M5/00 ,  B41M5/50 ,  B41M5/52 ,  B41J11/00 ,  B41M7/00 ,  C09D11/38

Abstract: The present invention relates to [1] an ink-jet printing method including a printing step of ejecting a water-based ink onto a surface of a printing medium to print characters or images thereon, in which the water-based ink includes a pigment (A), a polypropylene glycol (B), an organic solvent (C), a surfactant (D) and water; the polypropylene glycol (B) includes a polypropylene glycol (b-1) having a polymerization degree of not less than 5 and not more than 30, and a content of the polypropylene glycol (b-1) in the water-based ink is not less than 0.5% by mass and not more than 2% by mass; the organic solvent (C) includes at least a glycol ether, and the glycol ether has a viscosity of not more than 7.5 mPa·s as measured at 20° C.; a content of a high-boiling organic solvent having a boiling point of not lower than 250° C. in the water-based ink is not more than 5% by mass; and an amount of droplets of the water-based ink ejected upon printing the characters or images onto the printing medium is not more than 5 pL, and a printing speed used upon the printing is not less than 70 m/min in terms of a transportation speed of the printing medium, and [2] a water-based ink used in the ink-jet printing method.

公开(公告)号：US10266712B2

公开(公告)日：2019-04-23

申请号：US15504948

申请日：2015-08-18

Applicant: KAO CORPORATION

Inventor： Yuki Wakabayashi ,  Kaname Mitsuyoshi ,  Hirotaka Takeno

IPC: B41J2/01 ,  B41M5/00 ,  C09C1/00 ,  C09D11/30 ,  C09D11/107 ,  C09D11/322

Abstract: The present invention provides an ink-jet printing method using a water-based ink for ink-jet printing which is excellent in quick-drying fixing properties and long-term fixing properties when printing characters or images on a low-water absorbing recording medium, as well as ejection stability. The present invention relates to [1] an ink-jet printing method of printing characters or images on a recording medium using a water-based ink for ink-jet printing, in which the recording medium has a water absorption of not more than 10 g/m2 and not less than 0 g/m2 as measured in a pure water contact time of 100 milliseconds; the water-based ink includes a pigment (A), resin particles (B), a polypropylene glycol (X) and water; and the resin particles (B) are produced by emulsion polymerization method; and [2] the aforementioned water-based ink for ink-jet printing.

公开(公告)号：US09447298B2

公开(公告)日：2016-09-20

申请号：US14653140

申请日：2013-12-10

Applicant: KAO CORPORATION

Inventor： Yuki Wakabayashi ,  Kaname Mitsuyoshi ,  Hiroto Soma

IPC: C09D11/322 ,  C09D11/38 ,  C08K5/06

CPC classification number: C09D11/38 ,  C08K5/06 ,  C09D11/322

Abstract: The present invention relates to [1] a pigment-containing water-based ink for ink-jet printing which is free of turbidity and excellent in capability of suppressing occurrence of image unevenness (MOTTLING) when printed on a low-water absorbing recording medium, said ink including at least one acetylene glycol (A) selected from the group consisting of 2,4,7,9-tetramethyl-5-decyne-4,7-diol and the like, and a nonionic surfactant (B), a content of the component (A) in the water-based ink being not less than 1.0% by mass and not more than 3.0% by mass, and a mass ratio of the component (B) to the component (A) [(B)/(A)] being not less than 1 and not more than 3; and [2] an ink-jet printing method for printing images or characters on a low-water absorbing recording medium using said water-based ink for ink-jet printing.

Abstract translation: 本发明涉及[1]一种用于喷墨打印的含颜料的水性油墨，其在打印在低吸水性记录介质上时不含浊度和抑制图像不均匀（MOTTLING）发生的能力优异， 所述油墨包括至少一种选自2,4,7,9-四甲基-5-癸炔-4,7-二醇等的乙炔二醇（A）和非离子表面活性剂（B），含量 的水分油墨中的成分（A）的质量比为1.0质量％以上且3.0质量％以下，成分（B）与成分（A）[（B）/ （A）]不小于1且不大于3; 和[2]一种喷墨打印方法，用于使用所述用于喷墨打印的水性油墨在低吸水记录介质上打印图像或字符。

公开(公告)号：US09670374B2

公开(公告)日：2017-06-06

申请号：US15106965

申请日：2014-12-18

Applicant: KAO CORPORATION

Inventor： Yuki Wakabayashi ,  Hirotaka Takeno ,  Daiki Kawata

IPC: G01D11/00 ,  C09D11/36 ,  C09D11/322 ,  B41J2/01

CPC classification number: C09D11/36 ,  B41J2/01 ,  C09D11/322 ,  C09D11/38

Abstract: The present invention provides a water-based ink for ink-jet printing which is excellent in ejection stability and storage stability, in particular, excellent in quick-drying fixing properties and image uniformity when printing characters or images on a low-water absorbing recording medium, and an image forming method using the water-based ink. The present invention relates to [1] a water-based ink for ink-jet printing, including a pigment, a water-insoluble polymer, an organic solvent (C) and water, in which the organic solvent (C) includes diethylene glycol isopropyl ether (DEGPE) and an organic solvent (c2) having a 1-octanol/water partition coefficient that is smaller than that of DEGPE; a total content of the pigment, the water-insoluble polymer and DEGPE in the water-based ink is not less than 5.0% by mass; and a value obtained by multiplying a total content of the pigment and the water-insoluble polymer in the water-based ink by a content of DEGPE in the water-based ink is from 10 and 300; and [2] an image forming method including the steps of mounting a container filled with the water-based ink to an ink-jet printing apparatus equipped with an ink ejecting means; and ejecting the ink onto a recording medium having a water absorption of from 0 to 10 g/m2 as measured by contacting with pure water for 100 ms to print characters or images thereon.

公开(公告)号：US10584252B2

公开(公告)日：2020-03-10

申请号：US15738766

申请日：2016-06-24

Applicant: KAO CORPORATION

Inventor： Yuki Wakabayashi ,  Hirotaka Takeno

IPC: C09D11/033 ,  B41M5/00 ,  B41M7/00 ,  B41J11/00 ,  B41J2/21 ,  C09D11/322 ,  C09D11/037

Abstract: The present invention relates to [1] an ink-jet printing method including a printing step of ejecting a water-based ink onto a surface of a printing medium to print characters or images thereon, in which the water-based ink includes a pigment (A), an organic solvent (B), a surfactant (C) and water; the organic solvent (B) includes at least a glycol ether (b-1), and the glycol ether has a viscosity of from 2.0 to 5.5 mPa·s as measured at 20° C. and a vapor pressure of from 0.03 to 6.0 hPa as measured at 20° C.; a content of a high-boiling organic solvent having a boiling point of not lower than 250° C. in the water-based ink is not more than 5% by mass; and a printing speed upon printing the characters or images on the printing medium is not less than 70 m/min in terms of a transportation speed of the printing medium, and [2] a water-based ink used in the inkjet printing method.

公开(公告)号：US11841678B2

公开(公告)日：2023-12-12

申请号：US16967324

申请日：2019-02-08

Applicant: KAO CORPORATION

Inventor： Shoichi Murata ,  Manabu Suzuki ,  Yuki Wakabayashi

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G15/08

CPC classification number: G03G9/0804 ,  G03G9/0819 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/0904 ,  G03G15/08

Abstract: A method for producing a toner, including aggregating and coalescing resin particles and colorant particles in an aqueous medium. The resin particles contain, in the same or different particles, an amorphous polyester-based resin which is a polycondensate of an alcohol component containing an aromatic alcohol and a carboxylic acid component, and a crystalline polyester resin. The colorant particles contain a colorant and an addition polymer of a raw material monomer containing an addition-polymerizing monomer having an aromatic group. A ratio by mass of the colorant to the addition polymer in the colorant particles is 50/50 or more and 95/5 or less.

公开(公告)号：US11768446B2

公开(公告)日：2023-09-26

申请号：US16967274

申请日：2019-02-08

Applicant: KAO CORPORATION

Inventor： Shoichi Murata ,  Manabu Suzuki ,  Yuki Wakabayashi

IPC: G03G9/087 ,  G03G9/08 ,  G03G9/09

CPC classification number: G03G9/0804 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/0904

Abstract: A method for producing a toner, including aggregating and coalescing resin particles and colorant particles. The resin particles contain a composite resin containing a polyester resin segment, an addition polymer resin segment which is an addition polymerized product of a raw material monomer containing a styrenic compound, and a structural unit derived from a bireactive monomer bonding to the polyester resin segment and the addition polymer resin segment via a covalent bond. The colorant particles contain a colorant and an addition polymer of a raw material monomer containing a styrenic compound. The addition polymer contains a structural unit derived from the styrenic compound in the main chain. A ratio by mass of the colorant to the addition polymer in the colorant particles is 50/50 or more and 95/5 or less.