Essilor International (compagnie Generale D'optique)

Essilor International

Ronald Harmon

Hoa Thien Dang

Ronald A Berzon

Robert Alan Valeri

Xu Chen

Joey Oliveros Obordo

Matthew James Lockwood

Joshua Hazle

Matthew Lockwood

The present invention relates to a curable composition providing upon curing a transparent antistatic coating comprising a silica organosol, a salt comprising an alkali cation and a Bronsted acid. The invention further relates to optical articles comprising a substrate at least partially coated with a transparent antistatic coating formed by depositing onto substrate and curing the above curable composition. The obtained optical articles exhibit enhanced antistatic properties, high optical transparency, low haze and good mechanical properties, in particular a good abrasion resistance.

Composition for transparent antistatic coating

A method and coating used to prepare a photochromically-enabled bifocal ophthalmic lens. The method and equipment includes injection molding a single vision lens, for example, from polycarbonate. The clamp opens vertically and the top insert is exchanged for a bifocal mold having a base curve similar to the single vision lens. The thermoset coating includes compounds from several acrylate classes, and is applied to the single vision lens. The coating may include a photochromic dye. The coating is also formulated to receive a photochromic solution through an imbibition process.

Method for adding a thermoset overmold layer to a lens within a mold

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Clearwater, FL, United States of America

Ronald Harmon