CARBOXYL GROUP-CONTAINING POLYIMIDE, HEAT-CURABLE RESIN COMPOSITION, AND FLEXIBLE METAL-CLAD LAMINATE

摘要

Provided are a carboxyl group-containing polyimide and a prepolymer for the same, said carboxyl group-containing polyimide providing a cured product that simultaneously exhibits heat curing properties, PCT resistance, solvent resistance, and peel strength. The present invention relates to an imide prepolymer containing a terminal acid anhydride group and characterized by being obtained by reacting an acid anhydride group in a tetracarboxylic dianhydride with an isocyanate group in a diisocyanate compound. The present invention also relates to a carboxyl group-containing polyimide characterized by having a structure in which the aforementioned imide prepolymer containing a terminal acid anhydride group undergoes chain extension via a polyol compound. Furthermore, the present invention relates to a heat-curable resin composition and a flexible metal-clad laminate that use the carboxyl group-containing polyimide.