METHOD FOR PREPARING POLYAMIC ACID COMPOSITION CONTAINING NOVEL DICARBONYL COMPOUND, POLYAMIC ACID COMPOSITION, METHOD FOR MANUFACTURING POLYAMIDE-IMIDE FILM USING SAME, AND POLYAMIDE-IMIDE FILM PRODUCED BY SAME MANUFACTURING METHOD

摘要

The present invention relates to a method for preparing a polyamic acid composition, a polyamic acid composition, a method for manufacturing a polyamide-imide film using same, and a polyamide-imide film produced by the manufacturing method. More accurately, the present invention relates to: a novel dicarbonyl compound; a method for preparing a polyamic acid composition having excellent optical characteristics, a high glass transition temperature, and a low coefficient of thermal expansion through the application of a dicarbonyl compound containing aromatic and cycloaliphatic rings; a polyamic acid composition; a method for manufacturing a polyamide-imide film using same; and a polyamide-imide film produced by the manufacturing method.