| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an ink composition which shows excellent dispersibility, etc., because of the easiness in agitating the constituting titanium dioxide by means of the agitating ball upon caking in a marking pen by incorporating titanium oxide with a resin, a polyether ester amine salt, and an organic solvent. SOLUTION: There is provided an ink composition containing 5-60 wt.% rutile titanium oxide, 1-50 wt.% at least one member selected among alkyd resins, acrylic resins, etc., 0.1-10 wt.% polyether ester amine salt, and 5-90 wt.% organic solvent, such as of a hydrocarbon type, in which the resin is soluble. An example of the polyether ester amine salt used is a compound having a molecular weight of 1,000-20,000 and represented by formula I: R1-(CH2CHO)n- OSO3NH4, formula II: R2-(CH2CHO)n-OCONH4, formula III: R3-(CH2CHO)n- OPONH4, formula IV: [R4-(CH2CHO)n]2OPO2NH4, or the like. In the formulae, R1 to R3 are each an alkyl or hydrogen; R4 is an alkyl; and n is an integer of 45-500.</p> |
