Thermosetting polysiloxane compositions for anti-abrasion coating, process for their production and corresponding coated articles, especially ophthalmic glasses and lenses

摘要

Setting composition for use as an anti-abrasion coating comprising: A) an epoxysilane hydrolysate having from two to three alkoxy group directely linked to the silicon atom, B) colloidal silica, C) an aluminium compound. The composition which has at least a 1 % by weight water content is characterized in that the aluminium compound is selected from compounds corresponding to formula (I) or (II) wherein R and R' are alkyl group having a linear or branched chain with 1 to 10 carbon atoms. R" is an alkyl group having a linear or branched chain with 1 to 10 carbon atoms, a phenyl group, an alpha group where R has the above-mentioned meaning, n is an integer from 1 to 3. The invention also relates to a process for the production of these compositions and articles coated using same.