ABRASION-RESISTANT COATING COMPOSITION, PROCESS FOR MAKING SUCH COATING COMPOSITION AND ARTICLE COATED THEREWITH

摘要

The coating composition according to the invention comprises: (A) a component which is the reaction product with oxalic acid of at least one organometallic compound of the formula (I): R<1>y-M(OR)x-y wherein, M is a metal R is H or an alkyl radical, R<1> is a chelating ligand, x is the valency of the metal, y is an integer at least equal to 1 and x-y is at least equal to 1; and (B) at least one organoalkoxysilane of the formula (II): R<3>nSi(OR<2>)4-n wherein, R<2> is an alkyl radical, R<3> is an epoxidized alkyl group and n is an integer from 1 to 3 or a mixture of the organoalkoxysilane of formula (II) with an alkoxysilane of formula (II'): R'n'Si(OR'')4-n' wherein n' is an integer from 0 to 3, R" is H, an alkyl radical or an alkoxyalkyl radical, and R' is a vinyl, (meth)acryl, aromatic, cyclic or aliphatic alkyl radical. Application for making abrasion-resistant coating on plastic ophtalmic lenses.