PIGMENT DISPERSANT, AQUEOUS PIGMENT DISPERSION COMPOSITION, AQUEOUS INK, INK CARTRIDGE, RECORDING APPARATUS AND RECORDING METHOD

• Main Authors: SHINYA TOMOHIRO, YOSHIMURA KOSAKU
• Format: Patent
• Language: English; Japanese
• Published: 18.10.2018
• 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; PREPARATION OF CARBON BLACK; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a pigment dispersant excellent in pigment storage stability in an aqueous medium including an organic solvent in a neutral or weakly alkaline region.SOLUTION: A pigment dispersant is a polymer having a structural unit represented by general formula (1) in the figure and a structural unit derived from a polystyrene macromonomer. In general formula (1), Rrepresents a hydrogen atom or a methyl group, and Xrepresents a divalent linking group except a single bond.SELECTED DRAWING: None 【課題】有機溶媒を含む水系媒体における中性乃至弱アルカリ性領域での顔料の保管安定性に優れる顔料分散剤の提供。【解決手段】顔料分散剤は、下記一般式（１）で表される構造単位とポリスチレンマクロモノマー由来の構造単位とを有する重合体である。ここで、一般式（１）中、Ｒ１は、水素原子又はメチル基を示し、Ｘ１は、単結合を除く２価の連結基を示す。【選択図】なし