PRODUCTION OF HEAT RESISTANT COLORING PASTE FOR COLOR FILTER

摘要

PURPOSE:To disperse uniformly an org. pigment into varnish by dispersing the org. pigment into a solvent of a polyimide precursor by bringing arom. tetracarboxyic anhydride and arom. diamine or arom. diamine and diamine having a siloxane structure into reaction in the liquid. CONSTITUTION:N-methyl 2-pyrolidone or the like is used as an example of a polar solvent. The polyimide precursor is obtd. by bringing arom. tetracarboxylic anhydride and arom. diamine into reaction. The concn. of the polyimide precursor in the heat resistant coloring paste is usually 8-30% and is obtd. by adding arom. diamine into a solvent under stirring and adding arom. tetracarboxylic anhydride after dissolution to cause the reaction thereof. The reaction temp. for making the polyimide precursor soln. is 0-80 deg.C and the weight ratio of the org. pigment/polyimide precursor is made generally 10/90-75/25.