Aqueous pigented ink composition for ink jet ink for printing on vinyl

ビニル上に印刷するための水性顔料インクジェット用インキ組成物

Abstract

(57)【要約】 【課題】 前処理または後処理も必要としないで、ビニ ルまたは他の疎水性基体に耐久性があり水を通さず、耐 光性の画像を直接製造することのできるインキ組成物の 提供。 【解決手段】 インクジェット用インキ組成物は、少な くとも水および水と相溶性のグリコールまたはグリコー ルエーテルと、不溶性着色剤(好ましくは顔料)と、ポ リマー分散剤と、シリコンまたはフッ素化界面活性剤と を含む水性ビヒクルを含有しており、水はビヒクルの全 重量を基にして80重量%以下である。また、必要に応 じて、疎水性の主鎖および非イオン性で親水性の側鎖を 有し、水性ビヒクルに溶性で、水に不溶性であるグラフ トコポリマーを含んでもよい。
PROBLEM TO BE SOLVED: To obtain the subject ink composition, capable of forming durable, water-impermeable and light-resisting printed images on a hydrophobic substrate without requiring a pre-treatment or an after-treatment, by compounding an aqueous vehicle, a surfactant, an insoluble colorant and a polymeric dispersant which are specified, respectively. SOLUTION: This ink composition for ink jet, which is suitable for being directly printed on a hydrophobic substrate, comprises (A) an aqueous vehicle, which comprises at least water and a water-compatible solvent selected from a group consisting of glycols and glycol ethers and has a water content of <=80 wt.% based on the total weight of the vehicle, in an amount of, preferably, 70-99.8 wt.% (based on the total weight of the composition), (B) an insoluble colorant (having a particle diameter of, preferably, 0.01-0.3 μm) in an amount of, preferably, 1-8 wt.% (C) a polymeric dispersant in an amount of, preferably, 0.1-8 wt.% and (D) a surfactant selected from silicone surfactants and fluorinated surfactants in an amount of, preferably, 2-4 wt.%.

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