A non-erasable ink composition suitable for use in writing instruments is described comprising an isocyanate free thermoplastic polyurethane resin, a colorant and an organic solvent. The ink composition may also include a second resin, plasticizers, antioxidants, corrosion inhibitors, lubricants, chemical dispersants, and surfactants. The inks of the present invention exhibit a smooth writing performance and non-seepage.
描述了一种适用于书写工具的不可擦除油墨组合物,它由不含
异氰酸酯的热塑性聚
氨酯
树脂、
着色剂和有机溶剂组成。油墨组合物还可包括第二种
树脂、
增塑剂、
抗氧化剂、腐蚀
抑制剂、润滑剂、
化学分散剂和表面活性剂。本发明的油墨具有平滑的书写性能和不渗
水的特点。