NON-AQUEOUS INKJET INK

• Main Authors: SASAKI HIROSHI, ASAI TARO, YAMADA KOHEI
• Format: Patent
• Language: English; Japanese
• Published: 12.04.2018
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a non-aqueous inkjet ink suitable for printing mainly on a vinyl chloride base material, which has excellent printing performance such as stability in continuous discharge and good storage stability and can give a printed matter excellent in glossiness and durability.SOLUTION: The non-aqueous inkjet ink comprises an organic solvent, a pigment, and a vinyl chloride-vinyl acetate copolymer resin. The vinyl chloride-vinyl acetate copolymer resin has a weight average absolute molecular weight (|Mw|) of 20,000 to 40,000, and a ratio (|Mw|/|Mn|) of the weight average absolute molecular weight to a number average absolute molecular weight (|Mn|) of 1.3 or more and 2.2 or less; and the vinyl chloride-vinyl acetate copolymer resin is an emulsion polymerization product of vinyl chloride monomers and vinyl acetate monomers.SELECTED DRAWING: None 【課題】本発明は、連続吐出安定性等の印刷性能に優れ、良好な保存安定性を有するとともに、光沢や耐性に優れた印刷物を得ることが可能な、主に塩化ビニル基材への印刷に適した非水性インクジェットインキを提供することを目的とする。【解決手段】有機溶剤、顔料、及び塩化ビニル−酢酸ビニル共重合体樹脂を含有する非水性インクジェットインキであって、前記塩化ビニル−酢酸ビニル共重合体樹脂の重量平均絶対分子量（｜Ｍｗ｜）が２０，０００〜４０，０００であり、かつ、前記重量平均絶対分子量と数平均絶対分子量（｜Ｍｎ｜）の比（｜Ｍｗ｜／｜Ｍｎ｜）が１．３以上２．２以下であり、前記塩化ビニル−酢酸ビニル共重合体樹脂が、塩化ビニル単量体及び酢酸ビニル単量体の乳化重合物であることを特徴とする非水性インクジェットインキである。【選択図】なし