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US 2015/0309216 A1Published application
Method for coating an optical article with a topcoat using vacuum air plasma treatment
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorGerald FOURNAND
Life of this patent
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Abstract
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.
Claims13
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.
2 more elements
Dependencies are inferred from the claim text.