OILY INK COMPOSITION FOR WRITING INSTRUMENT, AQUEOUS INK COMPOSITION FOR WRITING INSTRUMENT, AND BALL POINT PEN

• Main Authors: SANTO TAKESHI, SHIROTA KINU, SHINDO TAICHI
• Format: Patent
• Language: English; Japanese
• Published: 24.09.2021
• Subjects: ADHESIVES; BUREAU ACCESSORIES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; IMPLEMENTS FOR WRITING OR DRAWING; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS; WRITING OR DRAWING IMPLEMENTS

To provide an oily ink composition for a writing instrument which suppresses aggregation of a coloring agent in an ink composition under low temperature and high temperature conditions, and has high dissolution stability, and an oily ink composition for a writing instrument that enables provision of a ball point pen which suppresses a blurring phenomenon at the beginning of writing, has such good writing feeling as to prevent skipping and blurring in handwriting, and has handwriting fastness.SOLUTION: There are provided an oily ink composition for a writing instrument which contains a medium containing alcohol or glycol ether, a resin dissolved in the medium and a coloring agent containing a compound represented by general formula (1); and an aqueous ink composition for a writing instrument which contains a carrier that is dispersed in an aqueous medium and carries the general formula (1).SELECTED DRAWING: None 【課題】低温及び高温条件下においてもインキ組成物内で着色剤の凝集が抑制され、溶解安定性が高い筆記具用油性インキ組成物を提供する。また、書き出しのカスレ現象が抑制され、筆跡に線飛びやカスレが生じない良好な書き味で、かつ高い筆跡堅牢性のボールペンを提供することができる筆記具用油性インキ組成物を提供する。【解決手段】アルコール、または、グリコールエーテルを含有する媒体、該媒体に溶解する樹脂および一般式（１）で表される化合物を含有する着色剤を含むことを特徴とする筆記具用油性インキ組成物、また、水性媒体に分散されている、一般式（１）を担持しているキャリアを含有することを特徴とする筆記具用水性インキ組成物。【選択図】なし