AQUEOUS INK, INK CARTRIDGE AND INKJET RECORDING METHOD

• Main Authors: YAMAMOTO MASASHI, KAKIKAWA KOJI, KAWABE MINAKO
• Format: Patent
• Language: English; Japanese
• Published: 04.08.2016
• 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

PROBLEM TO BE SOLVED: To provide an aqueous ink for inkjet capable of recording an image having excellent glossiness with inconspicuous beading.SOLUTION: An aqueous ink for inkjet includes a pigment, a water-soluble acrylic resin for dispersing the pigment, a water-soluble urethane resin and a nonionic fluorine-based surfactant. The water-soluble acrylic resin is a copolymer having two or more units derived from two or more kinds of monomers. In the two or more units, the ratio of a unit derived from a monomer having the glass transition temperature Tg of homopolymer of 0°C or higher is 95.0 mass% or more. The weight average molecular weight of the water-soluble urethane resin is 6,000 or more.SELECTED DRAWING: Figure 2 【課題】ビーディングが目立たず、かつ、優れた光沢性を有する画像を記録することが可能なインクジェット用の水性インクを提供する。【解決手段】顔料、顔料を分散するための水溶性アクリル樹脂、水溶性ウレタン樹脂、及びノニオン性のフッ素系界面活性剤を含有するインクジェット用の水性インクである。水溶性アクリル樹脂は、２種以上のモノマーに由来する２以上のユニットを有する共重合体であるとともに、２以上のユニットのうち、単独重合体のガラス転移温度Ｔｇが０℃以上のモノマーに由来するユニットの割合が９５．０質量％以上であり、水溶性ウレタン樹脂の重量平均分子量が６，０００以上である。【選択図】図２