CPC C08L 79/08 (2013.01) [B32B 27/20 (2013.01); B32B 27/281 (2013.01); C08J 5/18 (2013.01); B32B 2264/102 (2013.01); B32B 2264/301 (2020.08); B32B 2307/4026 (2013.01); B32B 2307/412 (2013.01); B32B 2457/20 (2013.01); B82Y 30/00 (2013.01); C08J 2379/08 (2013.01); C08K 2201/005 (2013.01)] | 18 Claims |
1. A method of preparing a composition for forming a polyimide film, the method comprising:
adding a pigment dispersion comprising a blue-based inorganic pigment having a maximum absorption wavelength of 520 to 650 nm and a dispersing agent to an organic solvent to form a mixed solution, wherein an average particle size of the inorganic pigment in the pigment dispersion is 10 to 95 nm;
dissolving a diamine in the mixed solution;
reacting a dianhydride with the diamine in the mixed solution to form a polyamic acid resin; and
adding a polyfunctional (meth)acryl-based compound after forming the polyamic acid resin.
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