Patent ID: 8158191

Claim:
A process for tinting a transparent, tintable, abrasion-resistant coating that is coated on at least one surface of a substrate, comprising: applying a polyurethane dispersion based primer to at least one surface of a polycarbonate or polyamide substrate; contacting the primer applied to the substrate with a coating composition that forms a transparent, tintable, abrasion-resistant coating upon curing, the coating composition comprising: an aqueous-organic solvent mixture having hydrolysis products and partial condensates of at least one of an epoxy functional silane and a diol functional organopolysiloxane, and at least one multifunctional crosslinker, wherein the multifunctional crosslinker comprises a silylated multifunctional anhydride, and wherein the at least one of the epoxy functional silane and the diol functional organopolysiloxane is present in a molar ratio to the multifunctional crosslinker from about 10:1 to 1:10; an amount of water sufficient to hydrolyze the at least one of the epoxy functional silane and the diol functional organopolysiloxane and the multifunctional crosslinker; and a blocked isocyanate; curing the coating composition to form a transparent, tintable, abrasion-resistant cured coating; and tinting the cured coating by immersing the coated surface of the substrate in a dye bath for the cured coating to absorb or transmit an amount of dye sufficient to allow up to about 50 percent light transmittance through the coated substrate.