Patent ID: 7273821

Claim:
A process for producing a porous layer adhering to a substrate, which comprises the steps: (a) preparing a composition comprising an organic polymer constituent and also an inorganic-organic constituent, wherein the inorganic-organic constituent of the composition is present as a dispersion in the organic polymer constituent, and further wherein the inorganic-organic constituent is one or more of the following compounds: 1,1′-diacetylferrocene; 2,6-dibromopyrazabole; dichloro(ethylenebisindenyl-zirconium); the zinc complex of 8,13-divinyl-3,7,12,17-tetramethyl-21H,23H-porphin-2,18-dipropionic acid, hexylphenyl-cyclotrisiloxane, complexes of hexadecafluoro-29H,31H-phthalocyanine with iron, cobalt, copper, nickel or zinc; potassium (tris-1,2-benzenediolato-O,O′-germanate), lithium limonyl-t-hexylborohydride, complexes of 2,3-naphthalocyanine with cobalt, copper or tin; nickel oxalate; the octabutoxy-29H,31H-phthalocyanine-aluminum triethylsiloxide complex; (b) applying the composition to a substrate; (c) forming a layer on the substrate, wherein the layer comprises copolymers of the organic polymer constituent and the inorganic-organic constituent; and (d) removing to a desired extent the inorganic-organic constituent from the copolymers in the layer to form a porous layer adhering to the substrate.