WATER-BASED BALLPOINT PEN INK COMPOSITION AND WATER-BASED BALLPOINT PEN

• Main Authors: TAKAHASHI SAKIKO, ITO ATSUSHI, NAKATANI YASUNORI
• Format: Patent
• Language: English
• Published: 09.12.2010
• 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

PROBLEM TO BE SOLVED: To provide a water-based ballpoint pen ink composition which reduces the wear of a ball receiving seat due to writing, prevents the feel of writing from getting poor and the script from getting fuzzy due to a sunk ball until water-based ink in an ink containing tube is used up, and prevents dispersed solid particles of the water-based ink in the ink containing tube from sedimentation even if the ballpoint pen is stood still for a long time, and to provide a ballpoint pen using the ink composition. SOLUTION: The water-based ballpoint pen ink composition contains at least a water-based dye as a colorant, silicon nitride particles, and water. Preferably, the silicon nitride particle has an average particle size of 0.1-2.0 μm and its content is 0.01-2.0 wt.% of the total amount of the water-based ballpoint pen ink composition. Particularly, the water-based ballpoint pen ink composition exhibits a great effect when used in a water-based ballpoint pen with a ball diameter of not larger than 0.4 mm. COPYRIGHT: (C)2011,JPO&INPIT