| 摘要 |
PURPOSE: A polyurethane polymer is provided to ensure excellent mechanical properties, release resistance to an etching liquid, and stripperability in a stripping liquid and to obtain an etching resist composition with excellent storage stability. CONSTITUTION: A polyurethane polymer is represented by chemical formula 1 or 2. The polyurethane polymer is obtained by polymerizing trifunctional isocyanate and diols including carboxylic acids as a side chain in a molar ratio of 1:2-1:5. An ink composition for printing etching resist comprises 65-85 weight% of the polyurethane polymers, 2-6 weight% of a high boiling point solvent having a boiling point of 100-150°C, 8-24 weight% of a low boiling point solvent having a boiling point of 60-80°C, and 1-6 weight% of additives including a wetting agent and an antifoaming agent. |
