ACTIVE ENERGY RAY-CURABLE INKJET INK

To provide an active energy ray-curable inkjet ink which has excellent ink storage stability and which can form a coated film having excellent curability, scratch resistance and oil residue prevention.SOLUTION: An active energy ray-curable inkjet ink includes a color material, a polymerizable compou...

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Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide an active energy ray-curable inkjet ink which has excellent ink storage stability and which can form a coated film having excellent curability, scratch resistance and oil residue prevention.SOLUTION: An active energy ray-curable inkjet ink includes a color material, a polymerizable compound (A), a polymerization initiator (B), and a water-insoluble organic solvent (C). The polymerizable compound (A) includes a polymerizable compound (D) of which the polarity item δP in the Hansen solubility parameter is 4.0 MPa1/2 or more and 10 MPa1/2 or less. An amount of the polymerizable compound (D) is 50 mass% or more based on the total amount of the polymerizable compound (A). An amount of the water-insoluble organic solvent (C) is 3 mass% or more and 9 mass% or less based on the total amount of the ink. The active energy ray-curable inkjet ink does not contain a polymerizable compound of which the polarity item δP in the Hansen solubility parameter is more than 10 MPa1/2.SELECTED DRAWING: None 【課題】インクの貯蔵安定性が良好であり、硬化性、擦過性、及び油ハキが良好な塗膜を形成可能な活性エネルギー線硬化型インクジェットインクを提供する。【解決手段】色材、重合性化合物(A)、重合開始剤(B)、及び非水溶性有機溶剤(C)を含み、重合性化合物(A)は、ハンセン溶解度パラメータにおける極性項δPが4.0MPa1/2以上10MPa1/2以下である重合性化合物(D)を含み、重合性化合物(D)は重合性化合物(A)全量に対し50質量%以上であり、非水溶性有機溶剤(C)はインク全量に対し3質量%以上9質量%以下であり、ハンセン溶解度パラメータにおける極性項δPが10MPa1/2超である重合性化合物を含まない、活性エネルギー線硬化型インクジェットインクである。【選択図】なし