AQUEOUS INK COMPOSITION FOR BALLPOINT PEN

• Main Authors: HIRAYAMA AKIKO, HAMAZAKI TAKASHI, OGURA KOSUKE
• Format: Patent
• Language: Chinese; English
• Published: 28.09.2021
• 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

Provided is an aqueous ink composition for a ballpoint pen, the composition having excellent ink ejectability even if a nip is exposed for a long period of time. The aqueous ink composition for a ballpoint pen according to the present invention is characterized by containing at least: 1-35 mass% of a titanium oxide having an average particle size of 0.1-1 [Mu]m (exclusive of 0.1); and 1-35 mass% of non-tacky urethane particles having an average particle size of 0.1-6 [Mu]m. 提供：即使长时间暴露笔尖墨排出性也优异的水性圆珠笔用墨组合物。本发明的水性圆珠笔用墨组合物的特征在于，至少含有：平均粒径超过0.1μm且为1μm以下的氧化钛1～35质量％；以及，平均粒径0.1μm以上且6μm以下的非粘合性的氨酯系颗粒1～35质量％。