公开(公告)号：US11220611B2

公开(公告)日：2022-01-11

申请号：US16626654

申请日：2018-07-09

Applicant: KAO CORPORATION

Inventor： Tomohiko Nagano ,  Kaname Mitsuyoshi ,  Tsuyoshi Egawa

IPC: C09D11/322 ,  C08K5/00 ,  C08K5/053 ,  C08K5/1515 ,  C08L33/08 ,  C08L33/10

Abstract: The present invention relates to [1] a water-based ink for ink-jet printing which can be prevented from suffering from increased viscosity and flocculation of the ink upon storage thereof even when used in the form of a system containing a large amount of a solvent, said water-based ink for ink-jet printing containing crosslinked polymer particles containing a pigment having an indanthrone skeleton, an organic solvent and water, in which a crosslinking rate of the crosslinked polymer is not less than 10 mol % and not more than 90 mol %, and a content of the organic solvent in the water-based ink is not less than 30% by mass and not more than 65% by mass, and [2] an ink-jet printing method including the steps of loading the water-based ink as described in the above [1] to an ink-jet printing apparatus, and ejecting the water-based ink in the form of droplets of the ink onto a printing medium to form characters or images on the printing medium.

公开(公告)号：US11459476B2

公开(公告)日：2022-10-04

申请号：US16764571

申请日：2018-12-20

Applicant: KAO CORPORATION

Inventor： Kaname Mitsuyoshi ,  Tsuyoshi Egawa ,  Tomohiko Nagano ,  Yusuke Shimizu

IPC: C09D17/00 ,  B41M5/00 ,  C09B55/00 ,  C09D11/033 ,  C09D11/037 ,  C09D11/322

Abstract: The present invention relates to [1] a process for producing a pigment water dispersion liquid of polymer particles containing an azomethine metal complex pigment (A), said process including the step of subjecting a mixture containing the azomethine metal complex pigment (A), an uncrosslinked aromatic group-containing polymer (b) and water to dispersion treatment using a medialess disperser at an accumulated input energy of not more than 5.0 kWh/kg, [2] a pigment water dispersion liquid containing an azomethine metal complex pigment (A) and a polymer dispersant (B), in which in an optical absorption spectrum of the pigment water dispersion liquid, a ratio of a maximum absorbance (A1max) in a wavelength range of not less than 440 nm and less than 465 nm to a maximum absorbance (A2max) in a wavelength range of not less than 420 nm and less than 440 nm [(A1max)/(A2max)] is not less than 1.000, and [3] a water-based ink for ink-jet printing, containing the aforementioned pigment water dispersion liquid.

公开(公告)号：US11549029B2

公开(公告)日：2023-01-10

申请号：US17266346

申请日：2019-07-26

Applicant: KAO CORPORATION

Inventor： Tomohiko Nagano ,  Teruyuki Fukuda ,  Takahiro Maeda

IPC: C09D11/322 ,  C09D11/106

Abstract: The present invention relates to [1] an aqueous composition for ink-jet printing containing a carbodiimide compound, a vinyl polymer and water, in which the vinyl polymer is dispersed in the aqueous composition in the form of polymer particles formed by partially neutralizing carboxy groups of the vinyl polymer with a basic compound having a boiling point of not higher than 130° C.; [2] an ink set for ink-jet printing containing an aqueous composition a containing a carbodiimide compound and water, and an aqueous composition b containing a vinyl polymer; and [3] an ink-jet printing method including the step 1 of ejecting a carbodiimide compound, a pigment, a vinyl polymer and water by an ink-jetting method to print characters or images, and the step 2 of subjecting the resulting printed characters or images to heat treatment at a temperature of 50 to 200° C. According to the aqueous composition of the present invention, it is possible to obtain a printed material that is excellent in rub fatness.

公开(公告)号：US11945960B2

公开(公告)日：2024-04-02

申请号：US17266389

申请日：2019-07-26

Applicant: KAO CORPORATION

Inventor： Tomohiko Nagano ,  Teruyuki Fukuda ,  Takahiro Maeda

IPC: C09D11/328 ,  B41J2/21 ,  B41M5/00 ,  B41M7/00 ,  C09D11/104 ,  C09D11/38 ,  C09D11/40 ,  C09D11/54

CPC classification number: C09D11/328 ,  B41J2/2107 ,  B41M5/0023 ,  C09D11/104 ,  C09D11/38 ,  C09D11/40 ,  C09D11/54 ,  B41M7/009

Abstract: The present invention relates to [1] an aqueous composition for ink-jet printing, containing a carbodiimide compound, a polyester resin and water; [2] a ink set for ink-jet printing containing an aqueous composition a containing a carbodiimide compound and water, and an aqueous composition b containing a polyester resin; [3] an ink set for ink-jet printing, containing the aforementioned aqueous composition for ink-jet printing and a water-based ink containing a colorant; and [4] an ink-jet printing method including the step 1 of ejecting a carbodiimide compound, a polyester resin, a colorant and water onto a surface of a printing medium by an ink-jetting method to print characters or images thereon; and the step 2 of subjecting the resulting printed characters or images to heat treatment at a temperature of 50 to 200° C. According to the aqueous composition of the present invention, it is possible to obtain a printed material that is excellent in rub fatness.

公开(公告)号：US11242466B2

公开(公告)日：2022-02-08

申请号：US16756084

申请日：2018-10-15

Applicant: KAO CORPORATION

Inventor： Tsuyoshi Egawa ,  Kaname Mitsuyoshi ,  Tomohiko Nagano

IPC: C09D11/40 ,  B41M5/00 ,  C09D11/108 ,  C09D11/322 ,  B41J2/21

Abstract: The present invention relates to an ink set for ink-jet printing which contains at least a water-based ink (I) and a water-based ink (II) in which the water-based ink (I) contains a pigment (A1) having a barbituric acid-derived structure, and the water-based ink (II) contains a diketopyrrolopyrrole pigment (A2), an ink-jet printing method using the ink set, and an ink-jet printed material.