METHOD FOR COATING AN OPTICAL ARTICLE WITH A TOPCOAT USING VACUUM AIR PLASMA TREATMENT

摘要

A method for providing an optical article, such as an ophthalmic lens, with a topcoat, includes: (a) activating the surface of an outermost organic coating of the article with vacuum air plasma, (b) optionally depositing a specific bond coat composition onto the activated surface, so as to obtain a bond coat, and (c) coating the activated surface of the outermost organic coating, or the bond coat if present, with the topcoat composition so as to form a topcoat, preferably an anti-fouling or anti-fog topcoat.

主权项

1. A method for providing an optical article with a topcoat, comprising:
(a) activating the surface of an outermost organic coating of said article with vacuum air plasma, (b) optionally depositing onto said activated surface a bond coat composition comprising at least one adhesion promoter comprising: (i) a —SiXYZ head group, wherein X, Y and Z are independently chosen from an halogen atom or an —OR group wherein each R is independently a linear alkyl having from 1 to 6 carbon atoms or a branched alkyl having from 3 to 6 carbon atoms, (ii) a reactive end group which is able to react, optionally after physical or chemical treatment, with at least one function carried by at least one compound included in a topcoat composition, and (iii) a spacer that links the head and end groups, so as to obtain a bond coat, (c) coating the activated surface of the outermost organic coating, or the bond coat if present, with said topcoat composition, so as to form a topcoat.