Essilor International (Compagnie Generale D'optique)

Kimberly Denise Anderson

Robert Alan Valeri

Sidney Shaw White, Jr

The invention relates to primer coating compositions exhibiting very good adhesion properties on a large variety of substrates, in particular plastic substrates such as ophthalmic lenses made of organic glasses and which also impart good impact resistance properties to the thus coated substrates. The invention also concerns substrates coated with these primer coating compositions as well as a method for making such coated substrates.

Epoxy/acrylate based primer coating compositions and their use in the optical field

The process comprises, (a) adding to a polymerizable composition containing a component A comprising at least one silane compound containing at least one epoxy group and at least two alkoxy groups directly bonded to the Si atom of the molecule or hydrolysate thereof and a component B comprising fine particles of silica, an effective amount of at least one cationic photopolymerization initiator and an effective amount of at least one thermal polymerization catalyst, (b) coating at least one surface of the substrate with the composition resulting from step (a), (c) submitting the coated substrate to a photopolymerization step for pre-curing the coating layer; and thereafter, (d) submitting the substrate with the pre-cured coating layer thereon to a thermal curing at a predetermined temperature and for a predetermined time to complete curing of the coating layer.

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St. Petersburg, FL, United States of America

Kimberly Denise Anderson