Transitions Optical, Inc.

Ppg Industries Ohio, Inc.

Anthony Thomas Gestrich

Elizabeth Ann Zezinka

Michael Frank Haley

Stephen Robinson

David B Knowles

Linda K Anderson

Feng Wang

Robert W Walters

Scott J Moravek

Cathy A Taylor

Sujit Mondal

Ian Michael Jones

Dave Knowles

Elizabeth A Zezinka

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

A compound capable of coordinating with a metal includes a chemical structure as shown in claim, in which: EPD represents a group having an electron pair donor atom; B and B' are each independently an aryl group, a heteroaryl group, an alkenyl group, or alkynyl group, or B and B&#x2032; form a spirocyclic group; and R, R, and Rare selected from various substituents.

Compounds for coordinating with a metal, compositions containing such compounds, and methods of catalyzing reactions

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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Pittsburgh, PA, United States of America

Anthony Thomas Gestrich