ACTIVE ENERGY RAY-CURABLE RED INK FOR LITHOGRAPHIC OFFSET PRINTING AND PRINTED MATTER

• Main Authors: SHIMIZU HIDEKI, MISHINA AKIYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 18.03.2022
• 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 active energy ray-curable red ink for lithographic offset printing which is excellent in ink fluidity and viscoelasticity.SOLUTION: The active energy ray-curable red ink for lithographic offset printing contains: a copolymer (A) comprising a polymer which contains, as essential polymerization components, (a) 5-70 mass% of a polyfunctional (meth)acrylate compound having 2-6 functional groups, (b) 0.1-50 mass% of an aryl (meth)acrylate compound, (c) 5-40 mass% of a styrene compound, (d) 0.1-10 mass% of a polymerizable unsaturated bond-containing compound having a hydrophilic group, (e) 0.1-10 mass% of a (meth)acrylate compound having a heterocyclic group containing nitrogen, and (f) 0.1-10 mass% of a (meth)acrylate compound having an alkylamino group (provided that the total amount of (a)-(f) is 100 mass%); a (meth)acrylate compound (B); a red azo pigment (D); and a polar group-containing pigment dispersant (E).SELECTED DRAWING: None 【課題】インキの流動性、及び粘弾性に優れる平版オフセット印刷用活性エネルギー線硬化型紅色インキ。【解決手段】（ａ）官能基数が２～６である多官能（メタ）アクリレート化合物を５～７０質量％と、（ｂ）アリール（メタ）アクリレート化合物を０．１～５０質量％と（ｃ）スチレン化合物を５～４０質量％と（ｄ）親水性基を有する重合性不飽和結合含有化合物を０．１～１０質量％と（ｅ）窒素を含有する複素環基を持つ（メタ）アクリレート化合物を ０．１～１０質量％と、（ｆ）アルキルアミノ基を持つ（メタ）アクリレート化合物を０．１～ １０質量％とを必須の重合成分として含有する重合物（但し（ａ）～（ｆ）の総量は１００質量％である）からなる共重合体（Ａ）と、（メタ）アクリレート化合物（Ｂ）と、紅系アゾ顔料（Ｄ）と、極性基含有顔料分散剤（Ｅ）を含有する。【選択図】なし