| 摘要 |
<p>PURPOSE:To obtain an oily ink composition containing a specific lubricant because of its excellent in lubricity, having an effect on preventing the abrations of a ball bearing seat, little in the blurry starting writing with the ball point pen due to the non-corrosion of copper or its alloy, not causing the discoloration of an ink with rest, and good in stability with the elapse of time. CONSTITUTION:This ink composition is characterized by adding (D) 4,4'- diaminodicyclohexylmethane as a lubricant, preferably in an amount of 0.5-10wt.% based on the whole amount of the composition, to a ball point oily ink composition comprising (A) an oil-soluble dyestuff (e.g. rhodamine or methyl violet) or a pigment (e.g. an azo pigment or titanium dioxide), (B) an oil-soluble resin (e.g. a ketone resin or phenol resin), and (C) an organic solvent (e.g. benzyl alcohol or phenoxyethanol). The components A, B and C and preferably compounded in amounts of 1--30wt.%, 1-30wt.% and 20-70wt.%, respectively, based on the whole amount of the composition.</p> |
