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

摘要

The purpose of the present invention is to provide a method for producing a polyimide resin that produces a polyimide resin excellent in heat resistance and mechanical properties and having a low dielectric constant even when heat-treated at a lower temperature; to provide a method for producing a polyimide coating that produces a polyimide coating excellent in heat resistance and mechanical properties and having a low dielectric constant even when heat-treated at a lower temperature; to provide a method for producing a polyamic acid solution that leads to a polyimide resin excellent in heat resistance and mechanical properties and having a low dielectric constant even when heat-treated at a lower temperature; and to provide a polyimide coating and a polyamic acid solution resulting from the methods. The polyimide resin is produced by heating at a certain temperature a polyamic acid resulting from the reaction of a tetracarboxylic acid dianhydride component and a diamine component in N,N,N,N-tetramethylurea.