PIGMENT DISPERSION, METHOD FOR PRODUCING TONER, AQUEOUS INK AND TRIAZO COMPOUND

• Main Authors: KITAO AKIKO, AZUMA TAKASHI, HAYAKAWA AI, WATABE HIROTERU, SUZUKI KOICHI
• Format: Patent
• Language: English; Japanese
• Published: 18.10.2018
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; CINEMATOGRAPHY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; FILLING PASTES; HOLOGRAPHY; INKS; LAKES; MAGNETOGRAPHY; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; ORGANIC CHEMISTRY; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PHOTOGRAPHY; PHYSICS; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a pigment dispersion that does not depend on the pigment type, has low viscosity, has excellent dispersibility, and can provide a toner and an aqueous ink with excellent color development (optical density) and storage stability.SOLUTION: A pigment dispersion contains a compound having a dispersion medium, an organic pigment, and a structure represented by formula (1). [In formula (1), Rto Rindependently represent a hydrogen atom, an unsubstituted alkyl group, a carboxy group-substituted alkyl group, a sulfonic acid group or sulfonic acid alkali metal salt-substituted alkyl group, a phosphate group or phosphoric acid alkali metal salt-substituted alkyl group, or a phosphoric acid alkali metal salt or the like, or Rto Ror Rto Rare bound to each other to form a ring, and Rto Rforming the ring represent an atom group required for the ring formation, and the formed ring may have a substituent].SELECTED DRAWING: None 【課題】顔料種に依存せず、低粘度で、分散性に優れており、発色性（光学濃度）および保存安定性が優れたトナーおよび水性インクを提供することができる顔料分散体を提供する。【解決手段】分散媒体、有機顔料、および式（１）で示される構造を有する化合物を含有する顔料分散体。［式（１）中、Ｒ１からＲ１０は、それぞれ独立して、水素原子、無置換のアルキル基、カルボキシ基で置換されたアルキル基、スルホン酸基またはスルホン酸アルカリ金属塩で置換されたアルキル基、リン酸基またはリン酸アルカリ金属塩で置換されたアルキル基、または、リン酸アルカリ金属塩等を表す、或いは、Ｒ１からＲ５あるいはＲ６からＲ１０は、互いに結合して環を形成し、環の形成に供されるＲ１からＲ１０は、環を形成するのに必要な原子団を表し、形成された環は、置換基を有していてもよい。］【選択図】なし