Transitions Optical, Inc.

Michael Frank Haley

Elizabeth Ann Zezinka

David B Knowles

Anthony Thomas Gestrich

Stephen Robinson

Linda K Anderson

Feng Wang

Cathy A Taylor

Anil Kumar

Robert W Walters

Anu Chopra

Wenjing Xiao

David John Park

Beon-Kyu Kim

Brian Smyth

Sujit Mondal

Emily Amond

Joseph D Turpen

An-Hung Yeh

Brian Shaughnessy

Nicholas J Parise

Dave Knowles

Elizabeth A Zezinka

Cathy Ann Taylor

The present invention relates to a photochromic article that includes a substrate and a photochromic layer formed from a curable photochromic composition. The photochromic composition includes a polyol component that includes a polycarbonate diol, an isocyanate component that includes an unblocked polyfunctional isocyanate and/or a blocked polyfunctional isocyanate, and at least one photochromic compound. The equivalents ratio of blocked/unblocked isocyanate equivalents of the isocyanate component to hydroxyl equivalents of the polyol component is at least 5:1. The photochromic article exhibits a T(Fade Half Life) at 23° C. of less than or equal to 70 seconds.

Photochromic article

A method of manufacturing an optical article () includes supplying a first coating composition (A) and supplying one or more additional coating compositions (B) to an ultrasonic discharge nozzle () of a coating apparatus (). At least one of the first coating composition (A) and the one or more additional coating compositions (B) is a photochromic coating composition. The method includes mixing the first coating composition and the one or more additional coating compositions at the ultrasonic discharge nozzle () of the coating apparatus (), and applying the mixture (C) of the first coating composition (A) and the one or more additional coating compositions (B) to at least a portion of the optical article () so as to provide a pattern () on the optical article upon exposure to actinic radiation. The mixture (C) of the first coating composition (A) and the one or more additional coating compositions (B) is applied from the ultrasonic discharge nozzle () as a controlled, predetermined pattern of atomized droplets.

Apparatus and method for precision coating of ophthalmic lenses with photochromic coatings

A curable photochromic composition can include: (a) a first component having a first compound with at least two active hydrogen-functional groups and an active hydrogen-functional group equivalent weight of at least 1000; (b) a second component having at least one of a polyisocyanate and a blocked polyisocyanate; and (c) at least one photochromic compound. The ratio of total isocyanate and blocked isocyanate group equivalents of the second component to total active hydrogen-functional group equivalents is at least 4:1.

Curable photochromic compositions

The present invention relates to a curable photochromic composition that includes: (a) a photochromic compound; and (b) a segmented polymer that includes active hydrogen groups, at least one first segment, and at least one second segment, in which, (i) each first segment independently includes a (meth)acrylic polymer segment, and (ii) each second segment independently includes at least one of, a polycarbonate segment, a polyester segment, a polyether segment, a polyurethane segment, and combinations of two or more thereof. The curable photochromic composition further includes (c) a curing agent having reactive functional groups that are reactive with the active hydrogen groups of the segmented polymer (a), in which the curing agent includes at least one of, a polyisocyanate, a polyisothiocyanate, and an aminoplast. The present invention also relates to photochromic articles that include at least one layer formed from the curable photochromic composition of the present invention.

Curable photochromic composition including a segmented polymer

A curable photochromic composition can include: (a) a first component having a first compound with at least two active hydrogen-functional groups and an active hydrogen-functional group equivalent weight of at least 1000; (b) a second component having at least one of a polyisocyanate and a blocked polyisocyanate; and (c) at least one photochromic compound. The ratio of total isocyanate and blocked isocyanate equivalents of the second component to total active hydrogen-functional group equivalents of the first component is at least 4:1.

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Glenshaw, PA, United States of America

Michael Frank Haley