公开(公告)号：US20190329553A1

公开(公告)日：2019-10-31

申请号：US16473398

申请日：2017-12-26

Applicant: KAO CORPORATION

Inventor： Takayuki SUZUKI ,  Hirotaka TAKENO

IPC: B41J2/165 ,  C11D3/43 ,  C11D3/37 ,  C11D3/40

Abstract: The present invention relates to a cleaning liquid for a water-based ink that contains a pigment and a water-insoluble polymer, said cleaning liquid containing (A) a surfactant, (B) a water-soluble organic solvent containing (b-1) diethylene glycol monoisopropyl ether, and water, in which the surfactant (A) contains at least one compound selected from the group consisting of (a-1) an acetylene glycol or an ethyleneoxide adduct of the acetylene glycol, and (a-2) a polyethylene glycol alkyl ether containing an alkyl group having not less than 8 carbon atoms or a polyethylene glycol aryl ether containing an aryl group having not less than 6 carbon atoms, and a content of the water-soluble organic solvent (B) in the cleaning liquid is from 5 to 30% by mass; and a method of cleaning a water-based ink using the cleaning liquid.

公开(公告)号：US20170037268A1

公开(公告)日：2017-02-09

申请号：US15106965

申请日：2014-12-18

Applicant: KAO CORPORATION

Inventor： Yuki WAKABAYASHI ,  Hirotaka TAKENO ,  Daiki KAWATA

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

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.

Abstract translation: 本发明提供一种喷墨印刷用水性油墨，其喷出稳定性和储存稳定性优异，特别是在低吸水性记录介质上打印字符或图像时，快干定影性和图像均匀性优异 ，以及使用该水性油墨的图像形成方法。 本发明涉及[1]一种喷墨印刷用水性油墨，其包含颜料，水不溶性聚合物，有机溶剂（C）和水，其中有机溶剂（C）包括二甘醇异丙基 醚（DEGPE）和具有小于DEGPE的1-辛醇/水分配系数的有机溶剂（c2）; 水性油墨中的颜料，水不溶性聚合物和DEGPE的总含量为5.0质量％以上。 并且通过将水性油墨中的颜料和水不溶性聚合物的总含量乘以DEGPE在水性油墨中的含量而获得的值为10和300; 和[2]一种图像形成方法，包括以下步骤：将填充有水性油墨的容器安装到具有喷墨装置的喷墨打印设备中; 并通过与纯水接触100ms来测量吸水率为0至10g / m 2的记录介质上，从而在其上打印字符或图像。

公开(公告)号：US20210253885A1

公开(公告)日：2021-08-19

申请号：US17270668

申请日：2019-04-26

Applicant: KAO CORPORATION

Inventor： Tomohide YOSHIDA ,  Hirotaka TAKENO

IPC: C09D11/107 ,  C09D17/00 ,  C09D11/037 ,  C09D11/033 ,  C09D11/322 ,  C09D11/52 ,  B22F9/24 ,  B22F1/00 ,  B41M5/00

Abstract: The present invention relates to a water-based metal fine particle dispersion containing metal fine particles (a) dispersed with a dispersant B, in which the dispersant B contains a vinyl-based polymer (b) containing a constitutional unit derived from a hydrophobic monomer, a constitutional unit derived from a carboxy group-containing monomer and a constitutional unit derived from a polyalkylene glycol segment-containing monomer in an amount of not less than 85% by mass, the fine particles (a) have a cumulant average particle size of 2 to 50 nm, and a concentration of metal in the dispersion is 30 to 80% by mass, and a process for producing the dispersion; a metallic printing ink containing the dispersion; and a metallic printing method using the ink.

公开(公告)号：US20200325350A1

公开(公告)日：2020-10-15

申请号：US16956684

申请日：2018-12-21

Applicant: KAO CORPORATION

Inventor： Takahiro SATO ,  Hirotaka TAKENO ,  Takayuki SUZUKI

IPC: C09D11/107 ,  C09D11/037 ,  C09D11/033 ,  B41M1/10

Abstract: The present invention relates to a resin particle dispersion containing core/shell-type resin particles (A), a glycol ether (B) and water, in which a core portion resin of the core/shell-type resin particles (A) contains a constitutional unit derived from a (meth)acrylic acid ester containing a hydrocarbon group having 2 to 18 carbon atoms in an amount of not less than 40% by mass on the basis of constitutional units constituting the core portion resin, and an acid value of the core/shell-type resin particles (A) is 50 to 100 mgKOH/g; and in which a hydrocarbon group in an ether moiety of the glycol ether (B) has 2 to 8 carbon atoms, and a content of the glycol ether (B) in the resin particle dispersion is not less than 2.8% by mass. The resin particle dispersion according to the present invention can be used as an aqueous ink that is excellent in storage stability and substrate-adhesion properties.

公开(公告)号：US20180187034A1

公开(公告)日：2018-07-05

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 ,  C09D11/322 ,  C09D11/037 ,  C09D11/102 ,  C09D11/033 ,  B41J2/21 ,  B41M5/00

CPC classification number: C09D11/40 ,  B41J2/01 ,  B41J2/015 ,  B41J2/2107 ,  B41M5/00 ,  B41M5/0023 ,  C09D11/033 ,  C09D11/037 ,  C09D11/102 ,  C09D11/30 ,  C09D11/322

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：US20180179405A1

公开(公告)日：2018-06-28

申请号：US15738766

申请日：2016-06-24

Applicant: KAO CORPORATION

Inventor： Yuki WAKABAYASHI ,  Hirotaka TAKENO

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

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：US20180171166A1

公开(公告)日：2018-06-21

申请号：US15738480

申请日：2016-06-24

Applicant: KAO CORPORATION

Inventor： Yuki WAKABAYASHI ,  Hirotaka TAKENO

IPC: C09D11/322 ,  C09D11/38 ,  B41J2/21 ,  B41M7/00 ,  B41J11/00

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：US20170369725A1

公开(公告)日：2017-12-28

申请号：US15539370

申请日：2015-12-16

Applicant: KAO CORPORATION

Inventor： Kaname MITSUYOSHI ,  Hirotaka TAKENO ,  Takayuki SUZUKI ,  Takahiro YOSHIKAWA

IPC: C09D11/38 ,  C09D11/324 ,  B41J2/01

CPC classification number: C09D11/38 ,  B41J2/01 ,  B41M5/00 ,  C09D11/324

Abstract: The present invention relates to a water-based ink that exhibits excellent ejection properties, and can be prevented from suffering from reduction in a dot size of the ink during a drying step thereof even when printed on a low-water absorbing recording medium, and is capable of obtaining printed characters or images having excellent uniformity, as well as an ink-jet printing method using the water-based ink. The water-based ink includes a pigment, a water-insoluble polymer, an acetylene glycol-based nonionic surfactant (A) having HLB of not less than 0 and not more than 5, a nonionic surfactant (B) having HLB of not less than 6 and not more than 20, a polyether-modified silicone (C) having a kinematic viscosity of not less than 30 mm2/s and not more than 190 mm2/s as measured at 25° C. and an organic solvent (D), in which a weighted mean value of a boiling point of the organic solvent (D) is not lower than 150° C. and not higher than 230° C.

公开(公告)号：US20170267885A1

公开(公告)日：2017-09-21

申请号：US15504948

申请日：2015-08-18

Applicant: KAO CORPORATION

Inventor： Yuki WAKABAYASHI ,  Kaname MITSUYOSHI ,  Hirotaka TAKENO

IPC: C09D11/322 ,  C09D11/107 ,  B41J2/01

CPC classification number: C09D11/322 ,  B41J2/01 ,  B41M5/0023 ,  B41M5/0047 ,  B41M5/0064 ,  C09C1/00 ,  C09D11/107 ,  C09D11/30

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：US20220403191A1

公开(公告)日：2022-12-22

申请号：US17779405

申请日：2020-11-16

Applicant: KAO CORPORATION

Inventor： Takahiro SATO ,  Hirotaka TAKENO

IPC: C09D11/322 ,  C08F220/56 ,  C08F220/18

Abstract: A resin particle dispersion containing core/shell-type resin particles and water is described. A shell portion resin of the core/shell-type resin particles contains a constitutional unit derived from a (meth)acrylic acid ester containing a hydrocarbon group having from 4 to 8 carbon atoms. A core portion resin of the core/shell-type resin particles contains a constitutional unit derived from a (meth)acrylamide-based monomer whose solubility parameter lies within the range of from 17.0 to 21.0 (J/cm3)0.5 in an amount of not less than 5% by mass, and a glass transition temperature of the core portion resin is not higher than 50° C. An acid value of the core/shell-type resin particles is from 50 to 100 mgKOH/g. A process for producing the resin particle dispersion and a printing method using the resin particle dispersion is also described.