Patent ID: 6709757
Filing Date: 2004-03-23
Classification: C01P,C09C,G01P,G07C

Abstract:
A method for the manufacture of composites with barrier properties, comprising:providing a substrate material, applying on the substrate material a barrier film containing ORMOCERs, the barrier film being applied by a method selected from the group consisting of brushing, spraying, rolling, centrifugal and doctor processes, and subsequently curing the barrier film by a process selected from the group consisting of heat, photochemical induction, thermal induction and mixtures thereof, the ORMOCERS being prepared by a hydrolytic condensation of a predetermined amount of a first monomeric starting material having at least one crosslinkable, organofunctional silane of the formula Râ€²â€³ mSiX (4-m), wherein X is selected from the group consisting of hydrogen, halogen, alkoxy, acyloxy, alkycarbonyl, alkoxycarbonyl and â€”NWâ€³2, where Râ€³ is selected from the group consisting of H and alky, and the radical Râ€²â€³ is selected from the group consisting of alkyl, alkenyl, alkinyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkinyl or alkinylaryl, in which the radicals can include O or S-atoms or the group â€”NRâ€³ and can carry one or more substituents from the group of halogens and optionally substituted amino, amide, aldehyde, keto, alkycarbonyl, carboxy, mercapto, cyano, hydroxy, alkoxy, alkoxycarbonyl, sulphonic acid, phosphoric acid, acryloxy, methacryloxy, epoxy or vinyl groups and, m has the value 1, 2, or 3, in which the radical Râ€²â€³ and/or the constituent must be a crosslinkable radical, and a predetermined amount of a second monomeric starting material having at least one metal compound of general formula MeRy in which Me is a metal selected from the group consisting of Al, Zr, or Ti, and the radical R, which can be the same or different, is selected from the group consisting of halogen, alkyl, alkoxy, acyloxy or hydroxy, in which said groups can be wholly or partly replaced by chelating ligands and/or an oligomer derived therefrom and/or an optionally complexed metal salt of an inorganic or organic acid, and wherein the value of y is 3 when Me is Al and y is 4 when Me is Zr or Ti, the predetermined amount of the first material and the predetermined amount of the second material being selected to optimize the barrier properties of the resultant barrier film, and applying at least one further film in which the further film is selected from the group consisting of another barrier material and an additional substrate material.