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1. 发明授权

US10655030B2 Water-based ink 有权
公开(公告)号：US10655030B2
公开(公告)日：2020-05-19
申请号：US15738487
申请日：2016-06-24
申请人： KAO CORPORATION
发明人： Hirotaka Takeno , Yuki Wakabayashi , Kaname Mitsuyoshi , Takahiro Yoshikawa
IPC分类号： C09D11/40 , C09D11/30 , B41J2/21 , C09D11/033 , C09D11/322 , C09D11/102 , B41M5/00 , C09D11/037
摘要： 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.

2. 发明授权

US10465083B2 Inkjet printing method and water-based ink 有权
公开(公告)号：US10465083B2
公开(公告)日：2019-11-05
申请号：US15738480
申请日：2016-06-24
申请人： KAO CORPORATION
发明人： Yuki Wakabayashi , Hirotaka Takeno
IPC分类号： B41J2/01 , B41J2/21 , C09D11/322 , B41M5/00 , B41M5/50 , B41M5/52 , B41J11/00 , B41M7/00 , C09D11/38
摘要： 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.

3. 发明授权

US10266712B2 Ink-jet printing with water-based ink on recording medium have low water-absorption 有权
公开(公告)号：US10266712B2
公开(公告)日：2019-04-23
申请号：US15504948
申请日：2015-08-18
申请人： KAO CORPORATION
发明人： Yuki Wakabayashi , Kaname Mitsuyoshi , Hirotaka Takeno
IPC分类号： B41J2/01 , B41M5/00 , C09C1/00 , C09D11/30 , C09D11/107 , C09D11/322
摘要： 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.

4. 发明授权

US09447298B2 Ink-jet printing method 有权
标题翻译：喷墨打印法
公开(公告)号：US09447298B2
公开(公告)日：2016-09-20
申请号：US14653140
申请日：2013-12-10
申请人： KAO CORPORATION
发明人： Yuki Wakabayashi , Kaname Mitsuyoshi , Hiroto Soma
IPC分类号： C09D11/322 , C09D11/38 , C08K5/06
CPC分类号： C09D11/38 , C08K5/06 , C09D11/322
摘要： 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.
摘要翻译：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。

5. 发明授权

US09670374B2 Water-based ink for inkjet printing 有权
公开(公告)号：US09670374B2
公开(公告)日：2017-06-06
申请号：US15106965
申请日：2014-12-18
申请人： KAO CORPORATION
发明人： Yuki Wakabayashi , Hirotaka Takeno , Daiki Kawata
IPC分类号： G01D11/00 , C09D11/36 , C09D11/322 , B41J2/01
CPC分类号： C09D11/36 , B41J2/01 , C09D11/322 , C09D11/38
摘要： 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.

6. 发明授权

US10584252B2 Inkjet printing method and water-based ink 有权
公开(公告)号：US10584252B2
公开(公告)日：2020-03-10
申请号：US15738766
申请日：2016-06-24
申请人： KAO CORPORATION
发明人： Yuki Wakabayashi , Hirotaka Takeno
IPC分类号： C09D11/033 , B41M5/00 , B41M7/00 , B41J11/00 , B41J2/21 , C09D11/322 , C09D11/037
摘要： 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.

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