Patent ID: 6342097
Filing Date: 2002-01-29
Classification: C09D,C23C,G02B,Y10T

Abstract:
A coating composition which, when applied to a substrate and cured, provides an abrasion resistant coating on the substrate which has a refractive index, comprising:an aqueous organic solvent mixture containing hydrolysis products and partial condensates of an epoxy functional silane, a metal oxide composite colloid, a disilane and a carboxylic acid functional compound wherein the carboxylic acid functional compound is selected from the group consisting of monofunctional carboxylic acids, multifunctional carboxylic acids, anhydrides, and combinations thereof, and further wherein the epoxy functional silane is present in a molar ratio to the disilane component and the metal oxide composite colloid component of from about 0.1:1 to 4:1; and further comprising from about 0.1 to about 70 weight percent, based on the total solids of the composition, of a colloidal silica component, wherein the colloidal silica component is an acidic colloidal silica component.