Patent ID: 6387446
Filing Date: 2002-05-14
Classification: C01G,C03C,C04B

Abstract:
Sol-gel process for the preparation of titanium oxide layers, comprising the following stages:(i) preparing a soluble, titanium-containing powder by: (a) reacting a titanium alcoholate reactant of the general formula Ti(OR)4, in which the radicals R are identical or different and represent straight-chain, branched or cyclic alkyl or alkenyl radicals having 1 to 10 carbon atoms, which optionally have one or more carbonyl and/or ester and/or carboxyl functions, with one or more polar compound reactant having complexing, chelating properties, (b) heating the reactants, (c) adding water to the reactants, optionally in the presence of a catalyst, (d) concentrating the reactants until a powder is obtained, (ii) dissolving the powder in a solvent to form a sol, (iii) coating a substrate with the sol and (iv) heating the coated substrate.