Water-based ink for ink jet printing

インクジェット記録用水性インク

Abstract

(57)【要約】 【課題】 皮膜形成性樹脂によって着色剤が内包された 着色樹脂粒子が水性媒体中に分散している、被記録材上 で滲みが少ない或いは泡立ちが小さい、或いは浸透性が 高く再溶解性に優れたインクジェット記録用水性インク を得る。 【解決手段】 皮膜形成性樹脂(A)によって着色剤 (B)が内包された着色樹脂粒子が水性媒体中に分散し ている有するインク中に、低級アルコールのプロピレン オキシド付加重合体を含有することを特徴とするインク ジェット記録用水性インク。
PROBLEM TO BE SOLVED: To obtain a water-based ink high in infiltrativity and redissolvability by adding a lower alcohol's propylene oxide addition polymer to an ink prepared by dispersing in an aqueous medium a colored resin particles with a colorant contained in a film-forming resin. SOLUTION: First, an ink is prepared by the following process: a film-forming resin (e.g. styrene-acrylic acrid resin) and a colorant (e.g. carbon black) are blended with methyl ethyl ketone and glass beads followed by kneading by use of a paint shaker, and methyl ethyl ketone and isopropyl alcohol are then added to the resultant blend into a mill-base solution, which, in turn, is incorporated with triethanolamine followed by dripping a mixed solution composed of glycerol and ion-exchanged water into the mixture under agitation followed by distilling off the organic solvent. The ink thus prepared is such one that colored resin particles with the colorant included in the film-forming resin is dispersed in an aqueous medium. Subsequently, the ink is blended with a lower alcohol's propylene oxide addition polymer to obtain the objective water- based ink low in blurring and foaming and good in infiltrativity and redissolvability.

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Cited By (18)

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    JP-2001164162-AJune 19, 2001Canon Inc, キヤノン株式会社Ink, ink jet recording process, ink jet recording device and color material
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    JP-2002327137-ANovember 15, 2002Dainippon Ink & Chem Inc, 大日本インキ化学工業株式会社水性インク組成物
    JP-2006322008-ANovember 30, 2006Seiko Epson Corp, セイコーエプソン株式会社インクジェット記録用インク
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