ACTINIC-RAY-CURABLE INK COMPOSITION

• Main Authors: SHIMOYAMA KOHEI, HISHINUMA KEISHIRO, ONOKO NAOTAKE, ITO AOI
• Format: Patent
• Language: English; Japanese
• Published: 11.01.2024
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

To provide an actinic-ray-curable ink composition that has good flowability and good dry-down and scratch resistance in printed matter obtained by using it, while reducing the use of photoinitiators by using monomers and oligomers that can polymerize without using the photoinitiators, and also reducing the use of diallyl phthalate resin out of consideration for the environment.SOLUTION: The actinic-ray-curable ink composition comprises: at least one (A) component selected from among (A1) polymers of allyl monomers, (A2) rosin-modified resins, and (A3) terpene monomer skeleton-containing resins; and a (B) component, which is (B1) a monomer and/or oligomer having an amine functional group and/or (B2) a combination of a monomer and/or oligomer not having an amine functional group but having an aryl ketone skeleton or alkyl aryl ketone skeleton with a polyether acrylate having an amine functional group.SELECTED DRAWING: None 【課題】光重合開始剤を用いずとも重合可能なモノマーやオリゴマーを用いることで光重合開始剤の使用を削減しつつ、さらに、環境への配慮からジアリルフタレート樹脂の使用を削減しながらも、良好な流動性を備え、かつそれを用いて得た印刷物におけるドライダウンや耐スクラッチ性を良好とすることのできる活性エネルギー線硬化型インキ組成物を提供すること。【解決手段】（Ａ１）アリル系モノマーの重合体、（Ａ２）ロジン変性樹脂及び（Ａ３）テルペンモノマー骨格含有樹脂から選択される少なくとも１つの（Ａ）成分と、（Ｂ１）アミン官能基を備えたモノマー及び／又はオリゴマー及び／又は（Ｂ２）アミン官能基を持たずアリールケトン骨格又はアルキルアリールケトン骨格を備えたモノマー及び／又はオリゴマーと、アミン官能基を備えたポリエーテルアクリレートとの両方の（Ｂ）成分とを含む活性エネルギー線硬化型インキ組成物とする。【選択図】なし