| 摘要 |
PURPOSE:To provide an ink composition for oily ball point pen, composed of a colorant, a resin, an organic solvent and a fluorine-based phosphonic acid compound, capable of providing a holograph free from unevenness of darkness or split and excellent in feeling in writing and smoothness. CONSTITUTION:This ink composition for oily ball point pen is composed of (A) preferably 5.0 to 40.0wt.% colorant such as an acid dye, (B) preferably 2.0 to 30.0wt.% resin such as a ketone resin, (C) preferably 20.0 to 70.0wt.% organic solvent such as phenyl cellosolve and (D) preferably 0.1 to 10.0wt.% fluorine-based phosphonic acid compound represented by formula I and/or II (R is a 2 to 10C alkyl or an alkylphenyl; Rf is a 6 to 13C perfluorocarbon; M is H, an alkaline metal, etc.), e.g. a compound of formula III. In addition, the viscosity of this composition is preferably 500 to 10000mPa.S at 20 deg.C. |
