Organosilane coating compositions and use thereof

摘要

A sol-gel coating composition comprising a hydrolysed organosilane, an arganometallic precursor and a corrosion inhibitor, wherein the corrosion inhibitor is a chelator for the organometallic precursor. The corrosion inhibitor and the organometellic precursor may form a nonoparticulate complex. The coating composition may comprise one or more additive selected from: an antimicrobial additive, a harder, a water repelling additive, a dye, a scratch resistant additive and a flexibility enhancing additive. A process for preparing a sol gel coating composition is also described, the process comprising the steps of: hydrolysing an organosilane in the presence of a catalyst; chelating an organosilane precursor; mixing the hydrolysed silane and the chelated organometallic precursor; and hydrolysing the organosilane-organometallic precursor mixture.