WATER-BASED INKJET INK FLOCCULATING SOLUTION, INK SETS, AND METHOD FOR MANUFACTURING PRINTED ARTICLE

• Main Authors: MOTOTANI AKIHIRO, YASUKAWA HIROYUKI, SASAKI TERUO, MAEDA SEISUKE
• Format: Patent
• Language: English; Japanese
• Published: 21.06.2023
• 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 water-based inkjet ink flocculating solution, which is used when applying various kinds of water-based inkjet inks, and which causes less bleeding of images and provides good dot sharpness.SOLUTION: Provided is a water-based inkjet ink flocculating solution containing a pigment dispersion having an anionic functional group, comprising water, a hydrophilic organic solvent, and a polyvalent metal salt of a monovalent acid, where the pKa of the monovalent acid in water at 25°C is -1.9 or less, and the pKa of the monovalent acid in dimethylsulfoxide at 25°C is +1.3 or less.SELECTED DRAWING: None 【課題】様々な種類の水系インクジェットインクを塗布する際に用いられる水系インクジェットインク用凝集液であって、画像の滲みが少なく、ドットの鮮鋭性が良好な水系インクジェットインク用凝集液を提供すること。【解決手段】上記課題を解決する水系インクジェットインク用凝集液は、アニオン性官能基を有する顔料分散体を含む水系インクジェットインク用の凝集液であり、水と、親水性有機溶媒と、１価の酸の多価金属塩と、を含み、前記１価の酸の、２５℃の水中におけるｐＫａが－１．９以下であり、かつ前記１価の酸の、２５℃のジメチルスルホキシド中におけるｐＫａが＋１．３以下である。【選択図】なし