| 摘要 |
<p>PURPOSE:To obtain an oily ink composition containing a specific lubricant, having an effect on preventing the abrasion of a ball bearing seat because of its excellent lubricity, little in the blurry starting writing with the ball point pen due to the non-corrosion of copper (alloy), not causing the discoloration, etc., of the ink with rust, and excellent in stability with the elapse of time. CONSTITUTION:This ink composition is characterized by adding (D) p,p'- tetramethyldiaminobenzophenone 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. spirone orange GRH, rhodamine) or a pigment (e.g. perinone or iron oxide), (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 are preferably compounded in amounts of 1-30wt.%, 1-30wt.%, and 20-70wt.%., respectively, based on the whole amount of the ink composition.</p> |
