Manufacturing process for dark-color polymer composite films

A process for producing a polymer composite film, comprising the steps of:

• (a) mixing a phthalocyanine compound with a precursor of a polymer and a liquid to form a slurry or suspension and forming said slurry or suspension into a wet film on a solid substrate, wherein said polymer is selected from the group consisting of polyimide, polyamide, polyoxadiazole, polybenzoxazole, polybenzobisoxazole, polythiazole, polybenzothiazole, polybenzobisthiazole, poly(p-phenylene vinylene), polybenzimidazole, polybenzobisimidazole, and combinations thereof;
• and
• (b) removing said liquid from said wet film and converting said precursor to form said polymer composite film comprising from 0.1% to 50% by weight of said phthalocyanine compound dispersed in said polymer;
• wherein polymer composite film has a tensile modulus of at least 3000 MPa or a dielectric strength of at least 1500 V/mil.