METHOD FOR PRODUCING AQUEOUS DYE SOLUTION, METHOD FOR PRODUCING WATER-BASED INK, AND INKJET RECORDING METHOD

• Main Authors: OGURI ISAO, YAMAGAMI HIDEKI, NAKAZAWA IKUO
• Format: Patent
• Language: English; Japanese
• Published: 12.10.2022
• 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; LAKES; LINING MACHINES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; 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 method for producing an aqueous dye solution for use in the preparation of a water-based ink for inkjet printing, which enables producing the aqueous dye solution in high yield by effectively removing impurities while inhibiting a degradation of the dye.SOLUTION: The present invention discloses a method for producing an aqueous dye solution for use in the preparation of a water-based ink for inkjet printing, the method including the step of separating hydrophobic impurities from an aqueous base solution, which comprises a dye and a hindered phenol compound as well as the hydrophobic impurities.SELECTED DRAWING: None 【課題】 染料の劣化を抑制しながら、不純物を効果的に除去して染料水溶液を高い収率で得ることが可能な、インクジェット用の水性インクの調製に用いる染料水溶液の製造方法などの提供。【解決手段】 インクジェット用の水性インクの調製に用いる染料水溶液の製造方法であって、染料、疎水性不純物、及びヒンダードフェノール化合物を含有する原料水溶液から、前記疎水性不純物を分離処理する工程を有することを特徴とする染料水溶液の製造方法。【選択図】 なし