abstract |
The present invention relates to a block copolymerized polyimide in which the block copolymerized polyimide is a polyimide obtained by heating tetracarboxylic dianhydride and diamine in a solvent consisting of at least one selected from ketones, ethers and esters in the presence of a catalyst of lactone and a base. It is a positive block copolymerized polyimide composition containing a mid composition, a photo-acid generator, an ink, and their manufacturing method, It does not whiten in air | atmosphere, It is characterized by the above-mentioned. |