Polyimide precursor liquid composition and polyimide coating film

A method for manufacturing a polyimide coating film comprising:

• converting a polyimide precursor liquid composition into a polyimide;
• and
• preparing a polyimide coating film from the polyimide,
• wherein the polyimide precursor liquid composition comprises:
• at least one type of tetracarboxylic dianhydride or derivative thereof;
• at least one type of diamine or derivative thereof;
• and
• a polar polymerization solvent;
• wherein the polyimide precursor liquid composition further includes a cyclic compound that is different from the polar polymerization solvent and has a 5 member ring structure that includes a carbonyl group (C═O bond);
• wherein the cyclic compound has a boiling point of 200° C. or more, comprises carbon, hydrogen and oxygen atoms, does not include hetero atoms of nitrogen, phosphorous and sulfur, is at least one selected from the group consisting of ethylene carbonate, propylene carbonate, butylene carbonate and γ-butyrolactone, and is present in an amount that prevents discoloration of a polyimide produced from the polyimide precursor;
• wherein when the polyimide precursor liquid composition including a solid portion is in an amount of 100 mass parts, an amount of the polar polymerization solvent is in a range of 150 to 900 mass parts and an amount of the cyclic compound is in a range of 15 to 750 mass parts in the polyimide precursor liquid composition;
• wherein the tetracarboxylic dianhydride comprises of a compound 3,3′,4,4′-biphenyl tetracarboxylic dianhydride (BPDA) expressed by the following chemical formula A′ and a compound 2,2-bis[3,4-(dicarboxyphenoxy)phenyl] propane dianhydride (BPADA) expressed by the following chemical formula B′, where a molar ratio of the BPDA in tetracarboxylic dianhydride is from 50 mol % to 90 mol % and a molar ratio of the BPADA in the tetracarboxylic dianhydride is from 10 mol % to 50 mol;
• wherein the diamine is a compound expressed by the following chemical formula 3, and
• wherein when the polyimide coating film has a thickness of 50±10 micrometers (μm) and is irradiated with light of 420 nanometers (nm), a transmittance of the polyimide coating film is at least 60%