| 摘要 |
PROBLEM TO BE SOLVED: To provide a composition for ball-point pen ink reverse-flow preventive agent which is excellent in properties at high temperature, a followable property, and impact resistance. SOLUTION: This composition for a ball-point pen ink reverse-flow preventive agent is composed of 85-98.9 mass% of basic oil consisting of one kind or a mixture of two kinds of dimethyl silicone oil having 100-10,000cSt kinematic viscosity at 25 deg.C, 1-10 mass% of hydrophylic ultrafine particulate silica, and 0.1-5 mass% of poly(oxyethylene and oxypropylene) polyol. |
