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    Cleaning liquid for aqueous ink comprising an acetylene glycol-based surfactant
    12.
    发明授权
    Cleaning liquid for aqueous ink comprising an acetylene glycol-based surfactant 有权

    公开(公告)号：US11319507B2

    公开(公告)日：2022-05-03

    申请号：US16473494

    申请日：2017-12-26

    Applicant: KAO CORPORATION

    Inventor： Takayuki Suzuki ,  Yasufumi Ueda

    IPC: C11D1/72 ,  B41J2/165 ,  C11D3/20 ,  C11D3/43 ,  C11D11/00 ,  C11D17/00

    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) an acetylene glycol having an average molar number of addition of EO of 0 to 2 mol, (B) at least one compound selected from the group consisting of an acetylene glycol having an average molar number of addition of EO of not less than 4 mol and a polyethylene glycol alkyl ether containing an alkyl group having not less than 8 carbon atoms, (C) a water-soluble organic solvent and water, in which the water-soluble organic solvent (C) contains at least one water-soluble organic solvent having a boiling point of not lower than 90° C.; a boiling point of the water-soluble organic solvent (C) is not higher than 250° C. in terms of a weighted mean value thereof; and a content of the water-soluble organic solvent (C) in the cleaning liquid is not more than 20% by mass; a process for producing the cleaning liquid; and a method of cleaning a water-based ink using the cleaning liquid.

    Gravure printing method
    13.
    发明授权
    Gravure printing method 有权

    公开(公告)号：US10960697B2

    公开(公告)日：2021-03-30

    申请号：US15756364

    申请日：2016-08-03

    Applicant: THINK LABORATORY CO., LTD. ,  KAO CORPORATION

    Inventor： Tatsuo Shigeta ,  Ryuma Mizushima ,  Yuta Matsumoto ,  Yasufumi Ueda

    IPC: B41M1/10 ,  B41F3/36 ,  C09D11/023 ,  B41F9/00 ,  B41F13/11 ,  B41F9/06 ,  B41N1/06

    Abstract: Provided is a gravure printing method by which high printing density and excellent highlight suitability are obtained, even if a gravure plate having high resolution and reduced thickness is used. The gravure printing method comprises: using an aqueous ink having a Zahn cup #3 viscosity at 20° C. of 11.0 seconds or more and 20.0 seconds or less, and having an evaporation rate of 30 mass % or less in a drying test, the drying test involving drying 1 g of the ink at a temperature of 40° C. and an air flow of 1,400 L/min for 30 minutes; and transferring 1 ml/m2 or more and 7 ml/m2 or less of the ink onto a printing medium.

    Ink jet recording device
    14.
    发明授权
    Ink jet recording device 有权

    公开(公告)号：US10543684B2

    公开(公告)日：2020-01-28

    申请号：US16077159

    申请日：2017-02-02

    Applicant: KAO CORPORATION ,  THINK LABORATORY CO., LTD.

    Inventor： Yuta Matsumoto ,  Kazuki Watanabe ,  Yasufumi Ueda ,  Tatsuo Shigeta

    IPC: B41J2/135 ,  B41J11/02 ,  B41M5/00 ,  C09D11/322 ,  C09D11/40

    Abstract: The present invention relates to an ink-jet printing apparatus that is capable of obtaining printed materials that are free of occurrence of color migration and have good appearance even when printed on a resin printing medium using a water-based ink, and an ink-jet printing method. The present invention provides an ink-jet printing apparatus including an ink-jet printing head that ejects a water-based ink onto a resin printing medium that is transported in a feeding direction thereof, and an under heater that heats the printing medium from a rear side surface of the printing medium opposed to a front side surface thereof which faces to the ink-jet printing head, in which the under heater is disposed at a position spaced at a distance of from 0.05 to 3.0 mm apart from the rear side surface of the printing medium upon printing, and an ink-jet printing method using the ink-jet printing apparatus.

    Aqueous gravure printing ink
    16.
    发明授权
    Aqueous gravure printing ink 有权

    公开(公告)号：US11952500B2

    公开(公告)日：2024-04-09

    申请号：US16972419

    申请日：2019-04-02

    Applicant: KAO CORPORATION

    Inventor： Yuki Ozaki ,  Yasufumi Ueda ,  Ryuma Mizushima ,  Takuto Matsuzono

    IPC: C09D11/037 ,  C09D11/107 ,  C09D11/108 ,  C08K5/23

    CPC classification number: C09D11/037 ,  C09D11/107 ,  C09D11/108 ,  C08K5/23

    Abstract: The present invention relates to an aqueous gravure ink containing a pigment, a water-soluble organic solvent, a surfactant and water, in which the water-soluble organic solvent contains a glycol ether having a boiling point of 100 to 260° C.; the surfactant contains a silicone-based surfactant containing a specific constitutional unit; a content of the water-soluble organic solvent in the ink is 1 to 10% by mass; and a content of water in the ink is 50 to 80% by mass. This ink exhibits a less burden on the environments, and is excellent in optical density and drying properties.

    Inkjet recording method
    17.
    发明授权
    Inkjet recording method 有权

    公开(公告)号：US11254157B2

    公开(公告)日：2022-02-22

    申请号：US16305020

    申请日：2017-06-01

    Applicant: KAO CORPORATION

    Inventor： Ryuma Mizushima ,  Yasufumi Ueda

    IPC: B41M5/00 ,  C09D11/322 ,  C08F20/06

    Abstract: The present invention relates to an ink-jet printing method including the step of ejecting a water-based ink containing pigment-containing water-insoluble polymer particles and water onto a printing medium to print characters or images on the printing medium, in which the pigment is at least one pigment selected from the group consisting of C.I. Pigment Red 177, C.I. Pigment Red 254, C.I. Pigment Green 7, C.I. Pigment Green 36 and C.I. Pigment Blue 15:6; the water-insoluble polymer constituting the particles contains a constitutional unit derived from an ionic monomer, a constitutional unit derived from a hydrophobic monomer and a constitutional unit derived from a monomer capable of forming a graft chain; and the printing medium is a low-water absorbing printing medium.

    Ink jet recording method
    18.
    发明授权
    Ink jet recording method 有权

    公开(公告)号：US10603928B2

    公开(公告)日：2020-03-31

    申请号：US16077298

    申请日：2017-02-02

    Applicant: KAO CORPORATION ,  THINK LABORATORY CO., LTD.

    Inventor： Yuta Matsumoto ,  Ryuma Mizushima ,  Takahiro Sato ,  Kazuki Watanabe ,  Yasufumi Ueda ,  Tatsuo Shigeta

    IPC: B41J11/00 ,  B41M7/00 ,  B41M5/00 ,  B41J2/21

    Abstract: The present invention relates to an ink-jet printing method that is capable of obtaining good printed materials that are free of occurrence of color migration and deformation of a printing medium even when printed on a resin printing medium. The present invention provides an ink-jet printing method using a water-based ink containing a black ink, a chromatic ink and a white ink which each contain a pigment (A), an organic solvent (C) having a boiling point of not lower than 90° C. and lower than 250° C., and water, said method including step 1 of ejecting at least one water-based ink selected from the group consisting of the black ink and the chromatic ink onto a transparent resin printing medium to print an image 1 on the printing medium; step 2 of ejecting the white ink onto the resulting image 1 to print a white image that covers the image 1 on the printing medium; and step 3 of heating and drying the resulting printed material from a side of a surface of the printing medium on which the white image is formed, using an infrared heater.

    Process for producing pigment-containing modified polymer particles
    19.
    发明授权
    Process for producing pigment-containing modified polymer particles 有权

    公开(公告)号：US10421862B2

    公开(公告)日：2019-09-24

    申请号：US15539591

    申请日：2015-12-22

    Applicant: KAO CORPORATION

    Inventor： Takahiro Sato ,  Yasufumi Ueda

    IPC: C09B67/00 ,  C08J3/05 ,  C08F8/32 ,  C09B67/46 ,  B41J2/01 ,  B41M5/00 ,  C08J3/03 ,  C09D11/037 ,  C09D11/322 ,  B41J2/21 ,  C08J3/07 ,  C08J3/21 ,  C09D11/107

    Abstract: The present invention relates to [1] a process for producing pigment-containing modified polymer particles, including the step of reacting pigment-containing polymer particles (A) containing a functional group and a compound (B) containing a reactive group capable of reacting with the functional group of the polymer particles (A) in a medium under such a condition that a ratio [(B)/(A)] of total moles of the reactive group of the compound (B) to total moles of the functional group of the polymer particles (A) is from 0.10 to 0.62; [2] a pigment water dispersion including an aqueous medium and the modified polymer particles produced by the aforementioned process which are dispersed in the aqueous medium; and [3] an ink including the aforementioned pigment water dispersion and an organic solvent. The modified polymer particles are free from formation of coarse particles upon production of pigment particles, so that an ink obtained by using the modified polymer particles can be prevented from suffering from increase in viscosity thereof when the ink is being concentrated by evaporation of water from the ink, and is excellent in rub fastness when printed on a low-water absorbing recording medium.

    Production method for fine organic pigment
    20.
    发明授权
    Production method for fine organic pigment 有权

    公开(公告)号：US09783680B2

    公开(公告)日：2017-10-10

    申请号：US14891180

    申请日：2014-05-14

    Applicant: KAO CORPORATION

    Inventor： Hironobu Fukuroi ,  Takahiro Sato ,  Isao Tsuru ,  Yusuke Shimizu ,  Yasufumi Ueda

    IPC: C09B67/02 ,  C09B67/00 ,  C09D11/00 ,  C09B67/46 ,  C09D11/322 ,  C09B67/20 ,  C09D17/00

    CPC classification number: C09B67/0022 ,  C09B67/006 ,  C09B67/0086 ,  C09B67/0089 ,  C09B67/009 ,  C09D11/00 ,  C09D11/322 ,  C09D17/003

    Abstract: The present invention provides the following process for producing a fine organic pigment which is capable of producing the fine organic pigment that has a very small primary particle size and is excellent in filtering property even in a cleaning step, and a fine organic pigment produced by the process; a process for producing a dispersion using the fine organic pigment, and a dispersion produced by the process; and a process for producing an ink using the dispersion. The present invention relates to [1] a process for producing a fine organic pigment, including steps 1 and 2: step 1: kneading a mixture prepared by compounding a raw material organic pigment, a water-soluble inorganic salt, a water-soluble organic solvent and a compound represented by the following formula (1) with each other, the compound being compounded in an amount of not less than 0.8 part by mass and not more than 18.0 parts by mass on the basis of 100 parts by mass of the raw material organic pigment: R1O(PO)m(EO)nA (1); and step 2: subjecting the mixture obtained in the step 1 to cleaning treatment with an aqueous solvent and then to filtration, [2] a fine organic pigment produced by the process according to the above aspect [1], [3] a dispersion produced using the fine organic pigment according to the above aspect [2], [4] a process for producing a paste of a fine organic pigment, including the above step 1 and 2, [5] a process for producing a dispersion, including step 3 of subjecting the paste of the fine organic pigment produced by the process according to the above aspect [4], an organic solvent and water to dispersing treatment, and [6] a process for producing an ink, including step 4 of mixing the dispersion produced by the process according to the above aspect [5] with at least one material selected from the group consisting of water and an organic solvent.

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