公开(公告)号：US20220033668A1

公开(公告)日：2022-02-03

申请号：US17503816

申请日：2021-10-18

Applicant: KAO CORPORATION

Inventor： Masashi INOUE ,  Daiki KAWATA

IPC: C09D11/322 ,  B41M5/00 ,  B41M5/52 ,  C09D11/023 ,  C09D11/033 ,  C09D11/037 ,  C09D11/107

Abstract: The present invention relates to a water-based ink containing at least pigment-containing water-insoluble crosslinked polymer particles (A), a polymer emulsion (B) and water, in which a water-insoluble crosslinked polymer constituting the crosslinked polymer particles (A) is obtained by subjecting a polymer that contains a constitutional unit derived from a carboxylic acid monomer having an acid value of not less than 200 mgKOH/g and a constitutional unit derived from a hydrophobic monomer, to crosslinking reaction with an epoxy compound, and a polymer constituting the polymer emulsion (B) contains a constitutional unit derived from a carboxylic acid monomer and a constitutional unit derived from a hydrophobic monomer. The water-based ink of the present invention is excellent in ejection stability and fastness of the printed characters or images while maintaining good optical density.

公开(公告)号：US20200332137A1

公开(公告)日：2020-10-22

申请号：US16957189

申请日：2018-12-25

Applicant: KAO CORPORATION

Inventor： Daiki KAWATA ,  Masashi INOUE ,  Tomoaki II

IPC: C09D11/107 ,  C09D11/033 ,  C09D11/322 ,  B41M5/00

Abstract: The present invention relates to [1] a water-based ink containing water-insoluble polymer particles (A), an organic solvent (B) and water, in which a polymer constituting the water-insoluble polymer particles (A) is in the form of a crosslinked polymer; the organic solvent (B) contains a polyhydric alcohol ether; and a rate of change in viscosity of the organic solvent (B) as calculated according to the formula (1) is not more than 140%, and [2] a printing method of printing characters or images on a printing medium using the water-based ink described in the above [1], in which a water absorption of the printing medium per a unit surface area thereof as measured by contacting the printing medium with pure water for 100 milliseconds is not less than 0 g/m2 and not more than 10 g/m2.

公开(公告)号：US20230392032A1

公开(公告)日：2023-12-07

申请号：US18250054

申请日：2021-10-26

Applicant: KAO CORPORATION

Inventor： Masashi INOUE ,  Daiki KAWATA ,  Tetsuya EGUCHI

IPC: C09D11/322 ,  C09D11/38 ,  C09D11/033 ,  C09D11/107

CPC classification number: C09D11/322 ,  C09D11/38 ,  C09D11/033 ,  C09D11/107

Abstract: A water-based ink for ink-jet printing, including a pigment, water-insoluble crosslinked polymer particles, an organic solvent, and water. The water-insoluble crosslinked polymer particles are constituted of a polymer A having a crosslinked structure, which includes carboxy groups and has an acid value of not less than 45 mgKOH/g and not more than 180 mgKOH/g. The ink includes alkali metal ions in an amount of not less than 15 mol % and not more than 65 mol %, and ammonium ions in an amount of not less than 55 mol % and not more than 145 mol %, both on the basis of a whole molar amount of the carboxy groups of the polymer A.

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。