COLORANT DISPERSION, INK, INK SET AND PRINTED MATTER

• Main Authors: OTSUKI EMI, TAKAHASHI MASATOSHI, TEZUKA TOSHIHIRO, SUGIHARA MASAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 04.07.2023
• 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 a colorant dispersion capable of preparing an inkjet ink which can be printed at high density on both coated and uncoated paper without requiring an ink receptive layer and has good storage stability.SOLUTION: There is provided a colorant dispersion containing a dispersant, a colorant and water, wherein the dispersant is a polymer containing a colorant adsorption group-containing monomer unit, a maleic acid unit and a maleic acid amide unit and the colorant adsorption group-containing monomer unit contains one or more of an α-olefin unit, a (meth)acrylic ester monomer unit having an alkyl group and a ring-containing monomer unit.SELECTED DRAWING: None 【課題】本発明は、インク受容層を必要とせず、塗工紙と非塗工紙の双方で高い濃度の印刷が可能であり、良好な保存安定性を有するインクジェットインキを作製できる着色剤分散体を提供することを目的とする。【解決手段】分散剤、着色剤、及び水を含む着色剤分散体であって、前記分散剤が、着色剤吸着基含有モノマー単位、マレイン酸単位、および、マレイン酸アミド単位を含む重合体であり、前記着色剤吸着基含有モノマー単位が、α－オレフィン単位、アルキル基を有する（メタ）アクリル酸エステルモノマー単位および環含有モノマー単位のうち１種以上を含む、着色剤分散体。【選択図】なし