The object is to provide a polyimide ink composition having good printing properties and good continuous printing properties, which composition can be dried at a low temperature of not higher than 220° C., and which composition gives a coating film, after being dried, having excellent dimensional stability, heat resistance, low modulus of elasticity, flexibility, resistance to warping, chemical resistance, adhesiveness with substrates, and plating resistance. This object is accomplished by a polyimide ink composition for printing, comprising a mixed solvent containing an benzoic acid ester solvent and a glyme solvent, and a polyimide soluble in the mixed solvent; wherein the polyimide is obtained by polycondensing a polyimide oligomer with a tetracarboxylic dianhydride component(s) and/or a diamine component(s) having no siloxane bond in molecular skeleton thereof, the polyimide oligomer being prepared by polycondensing a tetracarboxylic dianhydride component(s) and a diamine component(s) having siloxane bonds in molecular skeleton thereof in the presence of a base catalyst(s), or a mixed catalyst including a lactone(s) and/or an acidic compound(s) and a base(s); the content of the diamine component(s) having siloxane bonds based on the total diamine components being 15 to 85% by weight.
本发明的目的是提供一种聚
酰亚胺油墨组合物,具有良好的印刷性能和良好的连续印刷性能,该组合物可以在不高于220℃的低温下干燥,并在干燥后形成具有优异的尺寸稳定性、耐热性、低弹性模量、柔韧性、防弯曲性、耐
化学性、与基材的粘附性和电镀耐性的涂层膜。本发明通过提供一种聚
酰亚胺油墨组合物来实现这一目的,该组合物包括混合溶剂,其中包括
苯甲酸酯溶剂和
甘油二
甲醚溶剂,以及可在混合溶剂中溶解的聚
酰亚胺;其中,聚
酰亚胺是通过将聚
酰亚胺寡聚体与四
羧酸二酐组分和/或分子骨架中没有
硅氧烷键的二胺组分缩聚而得到的,聚
酰亚胺寡聚体是通过在碱性催化剂和/或包括内酯和/或酸性化合物和碱的混合催化剂存在下,缩聚含有
硅氧烷键的四
羧酸二酐组分和二胺组分而制备的;基于总二胺组分,含有
硅氧烷键的二胺组分的含量为15至85重量%。