METHOD OF PRODUCING POLYIMIDE RESIN, METHOD OF PRODUCING POLYIMIDE COATING, METHOD OF PRODUCING POLYAMIC ACID SOLUTION, POLYIMIDE COATING, AND POLYAMIC ACID SOLUTION

摘要

A method of producing a polyimide resin that produces a polyimide resin having excellent heat resistance and mechanical properties, and having a low dielectric constant even when heat-treated at a lower temperature. The method includes heating at 120° C. to 350° C. a polyamic acid resulting from the reaction of a tetracarboxylic acid dianhydride component and a diamine component in a solvent including at least a compound represented by the general formula (1), in which R¹ represents a hydrogen atom or a hydroxyl group, R² and R³ independently represent a hydrogen atom or a C₁ to C₃ alkyl group, and R⁴ and R⁵ independently represent a C₁ to C₃ alkyl group.;