POLYIMIDE-SILOXANE SOLUTION AND SUBSTRATE COATING METHOD

摘要

Disclosed is a solution which comprises (a) a substantially fully imidized polyimidesiloxane; and (b) a solvent which comprises at least 50 wt % of a substituted pyrrolidone having the general formulaic from C3 to C10. Also disclosed is a method of forming a coating on a substrate by applying the solution to the substrate and evaporating the solvent. Coatings formed from this solution are not subject to whitening as are coatings formed from the same polymers in other solvents.