| 摘要 |
PURPOSE: An ink for an ink jet printer is provided to obtain good stability at a room temperature when polyamide acid is contained in a concentration more than 25 weight% and to form a thick film(more than 1 micron) through one jetting. CONSTITUTION: An ink for an ink jet includes polyamide acid having a cross-linkable group on a molecular end and an average molecular weight of 500~7,500. The polyamide acid is obtained through a reaction of a compound having two or more acid anhydrides, diamine, a terminal cross-linking agent which is marked as a chemical formula 1, and a terminal cross-linking agent which is marked as a chemical formula 2. The chemical formula 2 is H2N-R^2. |
