Water-based ink for inkjet recording, method of producing said water-based ink

• Main Authors: OKADA SHINICHI, KAWAHARADA YUKIHIKO, TAGAYA TOMOKO, SHIMAMURA YOSHINOSUKE, BUEI HIROYUKI, MISAWA SOETRISNO
• Format: Patent
• Language: Chinese; English
• Published: 31.07.2013
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COLOUR PRINTING; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; CORRECTION OF TYPOGRAPHICAL ERRORS; DYES; FILLING PASTES; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; INKS; LINING MACHINES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SELECTIVE PRINTING MECHANISMS; STAMPS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

Disclosed is a water-based ink for inkjet recording which ensures at least a fixed level of pigment concentration and has excellent long-term storage stability and ejection stability; also disclosed is a method of simply and efficiently producing said water-based ink. Converting the pigment concentration to 1 mass%, the disclosed water-based ink for inkjet recording has a total content of polyvalent metal of 1.2ppm or less as an impurity in the water-based ink. The aforementioned water-based ink for inkjet recording is efficiently produced by means of contact treatment using a particulate chelate resin in which both alkali metal-type and hydrogen-type chelate-forming groups co-exist in the same molecule.