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：US20200255683A1

公开(公告)日：2020-08-13

申请号：US16756084

申请日：2018-10-15

Applicant: KAO CORPORATION

Inventor： Tsuyoshi EGAWA ,  Kaname MITSUYOSHI ,  Tomohiko NAGANO

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

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.

公开(公告)号：US20150337149A1

公开(公告)日：2015-11-26

申请号：US14653140

申请日：2013-12-10

Applicant: KAO CORPORATION

Inventor： Yuki WAKABAYASHI ,  Kaname MITSUYOSHI ,  Hiroto SOMA

IPC: C09D11/38 ,  C08K5/06 ,  B41J2/01

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：US20200248013A1

公开(公告)日：2020-08-06

申请号：US16756037

申请日：2018-10-15

Applicant: KAO CORPORATION

Inventor： Tsuyoshi EGAWA ,  Kaname MITSUYOSHI ,  Shimpei NISHIMURA

IPC: C09D11/037 ,  C09D11/326

Abstract: The present invention relates to [1] a water-based ink containing an azomethine metal complex pigment (A), an aromatic group-containing polymer (B), an organic solvent (D) and water, in which a mass ratio of the azomethine metal complex pigment (A) to the aromatic group-containing polymer (B) [(A)/(B)] is not less than 1.4 and not more than 4, and the aromatic group-containing polymer (B) is a crosslinked polymer obtained by crosslinking an aromatic group-containing polymer (b) having an acid value of not less than 80 mgKOH/g and not more than 400 mgKOH/g with a water-insoluble polyfunctional epoxy compound (c), said water-based ink being excellent in storage stability and maintenanceability, and [2] a process for producing a pigment water dispersion liquid of particles of the aromatic group-containing polymer (B) containing the azomethine metal complex pigment (A).

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.