Abstract: The present invention provides a process for preparing a multiple layer coating on the surface of an organic polymeric substrate by means of atmospheric pressure plasma deposition, the steps of the process comprising depositing a layer (first layer) of a plasma polymerized, optically clear, highly adherent, organosilicon compound onto the surface of the organic polymeric substrate by atmospheric pressure plasma deposition of a gaseous mixture comprising an organosilicon reagent compound and optionally an oxidant in a first step and thereafter in a second step depositing a substantially uniform layer (second layer) of a silicon oxide compound onto the exposed surface of said first layer by atmospheric pressure plasma deposition of a gaseous mixture comprising an oxidant and an organosilicon reagent compound, wherein the molar ratio of oxidant to organosilicon reagent compound in the gaseous mixture is greater in the second step than in the first step.

Abstract: A process for preparing a multiple layer coating on the surface of an organic polymeric substrate by means of atmospheric pressure glow discharge deposition, the steps of the process comprising depositing a layer (first layer) of a plasma polymerized, optically clear, organosilicon compound and thereafter in a second step depositing a substantially uniform layer (second layer) of a polymeric siloxane or silicon oxide compound onto the exposed surface of said first layer, wherein the multiple layer coating has a thickness of at least 2.0 ?m and an abrasion resistance demonstrating a change of 20 delta haze units or less after 500 Tabor cycles, measured according to ASTM D1044, CS10F wheels, 500 g weight.

Abstract: A process for creating plasma polymerized deposition on a substrate using a glow discharge is described. The glow discharge is created between an electrode and a counterelectrode. A mixture of a balance gas and a tetraalkylorthosilicate is flowed through the glow discharge onto a substrate to deposit a coating onto the substrate as an optically clear coating or to create surface modification. The process, which is preferably carried out at or near atmospheric pressure, can be designed to create an optically clear powder-free or virtually powder free coating.