Transitions Optical, Inc.

Ppg Industries Ohio, Inc.

Sujit Mondal

Darrin R Dabideen

Anil Kumar

Meng He

Anu Chopra

Wenjing Xiao

Robert W Walters

Xiao-Man Dai

Ruisong Xu

Rachael L DeMeio

Scott J Moravek

Massimiliano Tomasulo

Huayun Yu

Beon-Kyu Kim

Elizabeth Ann Zezinka

Michael Frank Haley

Anthony Thomas Gestrich

Ian Michael Jones

Rachel L DeMeio

Nick J Parise

Emily Amond

Nicholas J Parise

Brian Shaughnessy

An-Hung Yeh

Joseph D Turpen

Nick Parise

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 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

A photochromic compound including a core skeletal structure represented by the following Formula (I), 

Photochromic indeno-fused naphthopyran compounds with reduced temperature dependence

The present invention relates to photochromic articles that include a substrate and at least one photochromic material that is adapted to change from an unactivated form to an activated form by exposure to radiation substantially in the wavelength range from 380 to 450 nanometers when measured over a range of from 380 to 700 nanometers. The photochromic article is also adapted to retain at least 12 percent of the delta OD measured in the Outdoor Test when tested in the Behind the Windshield Test. The photochromic material can be selected from certain compounds including, for example, fluoranthenoxazines, naphthopyrans, phenanthropyrans, fluoranthenopyrans, and indenonaphthopyrans, which each have bonded thereto at least one chiral or achiral lengthening group that provides the photochromic compound with dichroic properties. The present invention also relates to methods of forming a photochromic article.

Photochromic articles that include photochromic-dichroic materials

Described herein are compounds generally comprising an indeno[2',3&#x2032;:3,4]naptho[1,2-b]pyran structure. Such compounds may be useful for their photochromic properties, and be used in certain photochromic compositions. Such compositions may further comprise other photochromic compositions and/or materials. Additionally, such compounds and/or compositions may be suitable for preparing certain photochromic articles. Also described herein are methods for preparing certain photochromic compounds, compositions, and articles.

Photochromic compounds and compositions

Described herein are compounds generally comprising an indeno[2',3&#x2032;:3,4]naptho[1,2-b]pyran structure. Such compounds may be useful for their photochromic properties, and be used in certain photochromic compositions. Such compositions may further comprise other photochromic compositions and/or materials. Additionally, such compounds and/or compositions may be suitable for preparing certain photochromic articles.

The present invention relates to compounds represented by the following Formula I, Ring-A of the Formula I can be, for example an aryl group, and Lis a chiral or achiral lengthening group. The compound represented by Formula I can be a photochromic compound. The present invention also relates to photochromic compositions and photochromic articles that include one or more photochromic compounds, such as represented by Formula I.

Growing community of inventors

Gibsonia, PA, United States of America

Sujit Mondal