Abstract:
A colored matting powder includes particles containing a polyimide obtained by reacting diamine and dianhydride monomers at a substantially equal molar ratio, and a pigment incorporated with the polyimide, a portion of the pigment being located at an outer surface of the particles. Moreover, a colored polyimide film is also described as incorporating the colored matting powder, and can exhibit low gloss, low transparency and good insulation.
Abstract:
An aromatic polyimide film can be formed from a plurality of monomers comprising an aromatic dianhydride, and a first aromatic diamine selected from a group consisting of formulae (I) and (II): and wherein X and Y are respectively selected from the group consisting of oxygen, nitrogen and sulfur, and R and R′ are respectively selected from the group consisting of NH2, wherein the aromatic polyimide film has an average linear coefficient of thermal expansion equal to or below about 5 ppm/° C. in a temperature range between about 50° C. and about 500° C.
Abstract:
A colored matting powder includes particles containing a polyimide obtained by reacting diamine and dianhydride monomers at a substantially equal molar ratio, and a pigment incorporated with the polyimide, a portion of the pigment being located at an outer surface of the particles. Moreover, a colored polyimide film is also described as incorporating the colored matting powder, and can exhibit low gloss, low transparency and good insulation.