INK, INK STORAGE CONTAINER AND INKJET RECORDING DEVICE

• Main Authors: KOIIZUKA YUSUKE, MATSUYAMA AKIHIKO, TAKAHASHI SATOSHI, YOKOHAMA YUKI, KUDO MAKI, OYAMA KOICHIRO, IMANAGA YUKIHIRO, SUGITA TAKETO
• Format: Patent
• Language: English; Japanese
• Published: 06.02.2020
• 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

To provide an ink capable of performing good quality recording having excellent preservability and discharge stability, high drying properties and suppressed beading.SOLUTION: There is provided an ink which contains a colorant, a polymer compound, a compound represented by the following general formula (1) and a solvent S having an SP value of 9.0 or more and 11.0 or less, in which the polymer compound has a structural unit derived from a vinyl monomer (A) having an aromatic group and a structural unit derived from a monomer (B) which is (meth)acrylic acid or its ester, the ratio B/A (mass ratio) of the structural unit derived from the monomer (B) which is (meth)acrylic acid or its ester to the structural unit derived from the vinyl monomer (A) is 0.20 to 0.60 and the content of the solvent S in the ink is 10 mass% or less. In the general formula (1), R represents an alkyl group having 8 to 13 carbon atoms, Rrepresents a hydrogen atom or a methyl group and n represents an integer of 2 to 12.SELECTED DRAWING: None 【課題】本発明は、保存性及び吐出安定性に優れ、乾燥性が高く、ビーディングが抑制された良好な品位の記録が可能なインクの提供を目的とする。【解決手段】色材、高分子化合物、下記一般式（１）で表される化合物、ＳＰ値が９．０以上、１１．０以下の溶剤Ｓを含み、前記高分子化合物は、芳香族基を有するビニルモノマー（Ａ）に由来する構造単位と、（メタ）アクリル酸またはそのエステルであるモノマー（Ｂ）に由来する構造単位とを有し、前記芳香族基を有するビニルモノマー（Ａ）に由来する構造単位に対する前記（メタ）アクリル酸またはそのエステルであるモノマー（Ｂ）に由来する構造単位の比Ｂ／Ａ（質量比）が０．２０〜０．６０であり、前記溶剤Ｓのインク中における含有量が１０質量％以下であるインク。ただし、一般式（１）中、Ｒは炭素数８〜１３のアルキル基を示し、Ｒ1は水素原子又はメチル基を示し、ｎは２〜１２の整数を示す。【選択図】なし