ULTRAVIOLET RAY-CURABLE AQUEOUS INK FOR INKJET PRINTING, ULTRAVIOLET RAY-CURABLE AQUEOUS COMPOSITION FOR INKJET PRINTING, AND PRINTED MATTER

• Main Authors: TSUJIMOTO ATSUSHI, NAKAGAWA TOMOKO, KARASAWA TAMAE, WAKABAYASHI KAZUKI, SAKATANI SHUHEI, INABA KEISUKE, NOGAMI HIROYUKI
• Format: Patent
• Language: English; Japanese
• Published: 14.12.2022
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COLOUR PRINTING; CORRECTING FLUIDS; CORRECTION OF TYPOGRAPHICAL ERRORS; DYES; FILLING PASTES; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; INKS; LINING MACHINES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

To provide an ink for inkjet printing excellent in environment safety property, meeting high requirement characteristics as an ink for printing of an inkjet printer for commercial use such as high picture quality performance, high coated film performance, rapid printing property, and substrate versatility, in a balanced manner, and being particularly excellent in alcohol resistance, scratch resistance, and elution resistance, and yet excellent in pigment dispersion stability.SOLUTION: An ultraviolet ray-curable aqueous ink for inkjet printing includes: at least an ultraviolet ray-curable oligomer; and a coloring agent, where the ultraviolet ray-curable oligomer has a structural unit derived from a polyisocyanate compound (A), a structural unit derived from a compound (B') indicated below, and a structural unit derived from a compound (C') indicated below. The compound (B') is a compound containing two or more polymerizable unsaturated bonds, and capable of being bonded to the polyisocyanate compound (A). The compound (C') is a water-soluble compound capable of being bonded to the polyisocyanate compound (A), and having a (meth)acryloyl group.SELECTED DRAWING: None 【課題】環境・安全性に優れ、高画質性能、高塗膜性能、高速印刷性、基材汎用性といった商業用インクジェットプリンターの印刷用インクとしての要求特性をバランスよく高度に満たし、特に耐アルコール性、耐擦過性及び耐溶出性に優れ、しかも顔料分散安定性にも優れるインクジェット印刷用インクを提供する。【解決手段】インクジェット印刷用紫外線硬化性水系インクは、少なくとも紫外線硬化性オリゴマーと着色剤とを含有し、該紫外線硬化性オリゴマーは、ポリイソシアネート化合物（Ａ）由来の構造単位、下記に示す化合物（Ｂ'）由来の構造単位、及び下記に示す化合物（Ｃ'）由来の構造単位を有する紫外線硬化性オリゴマーである。化合物（Ｂ'）：重合性不飽和結合を２以上含有し、ポリイソシアネート化合物（Ａ）と結合可能な化合物化合物（Ｃ'）：ポリイソシアネート化合物（Ａ）と結合可能で、かつ（メタ）アクリロイル基を有する水溶性化合物【選択図】なし