Thermosetting compositions, cured film, and color filter

The present invention relates to a thermosetting composition, a hard coat and a color filter. The thermosetting composition comprises polyesteramide acide (A), cyclic ether compound polymer (B) and ahardener (C). The polyesteramide acide (A) is selected from reaction products comprising raw materials of X-mol tetracarboxylic dianhydride, Y-mol diamine and Z-mol polyhydroxy compounds, and the cyclic ether compound polymer (B) is the polymer having the compound (b1) of oxyheterocyclic butyl. The thermosetting composition is employed to form a hard coat with excellent shielding, and the reliability of the electronic part having the hard coat is improved. 0.2