申请人:TOYO INK SC HOLDINGS CO., LTD.
公开号:US10457820B2
公开(公告)日:2019-10-29
The present invention relates to an alcohol-based printing ink composition, comprising a colorant (E), a medium and a polyurethane urea resin (D) obtained by reacting a polyol (A), a diisocyanate (B) and a chain extender (C), wherein the polyol (A) comprises a polyester polyol (A0) having a repeating unit derived from a saturated hydroxycarboxylic acid having a side chain, and the medium comprises an alcohol (F), wherein the proportion of the alcohol (F) is at least 50% by weight relative to a value of 100% by weight for the total medium. Accordingly, the invention provides a printing ink comprising an alcohol having minimal environmental impact as the main component of the ink medium, the ink exhibiting excellent colorant dispersibility and storage stability, and having excellent re-solubility during long runs.
本发明涉及一种醇基印刷油墨组合物,包括着色剂 (E)、介质和通过多元醇 (A)、二异氰酸酯 (B) 和扩链剂 (C) 反应得到的聚氨酯脲树脂 (D)、其中多元醇 (A) 包括聚酯多元醇 (A0),其重复单元来自具有侧链的饱和羟基羧酸,介质包括醇 (F),其中相对于总介质的 100%重量值,醇 (F) 的比例至少为 50%(重量)。因此,本发明提供了一种包含对环境影响最小的醇类作为油墨介质主要成分的印刷油墨,该油墨表现出优异的着色剂分散性和储存稳定性,并在长时间运行过程中具有优异的再溶性。