Ppg Industries, Inc.

Transitions Optical, Inc.

Michael S Misura

Anil Kumar

Robert W Walters

Barry Van Gemert

Robert A Smith

Anu Chopra

Richard A Schwarz

Kevin J Stewart

Cletus N Welch

Edward J Sare

Stephanie J Oates

John S Ligas

Clara E Nelson

I Roger Leatherman

Described are photochromic articles that include a substrate and a photochromic amount of at least one organic photochromic material (b) represented by graphic formula XIII adapted to change from an unactivated state to an activated state by exposure to radiation substantially in a wavelength range from 380 to 410 nanometers (nm) when measured over a wavelength range of from 380 to 700 nm. The photochromic articles demonstrate a photochromic response when activated behind an ultraviolet blocking transparency such as an automotive windshield. For example, the photochromic articles retain at least 12 percent of the activation measured as change in optical density or delta OD under outdoor simulating conditions in the Outdoor Test when tested under conditions simulating an eyeglass wearer behind an automotive windshield in the Behind the Windshield Test. Methods for producing the aforedescribed photochromic articles are also described.

Photochromic articles that activate behind ultraviolet radiation blocking transparencies and methods for preparation

Described are imbibition compositions that incorporate kinetic enhancing additive(s) into photochromic polymeric host material. Kinetic enhancing additives include organic polyol(s), epoxy-containing compound(s) or a mixture thereof that improves the performance of organic photochromic compounds in the polymeric host as determined in the Photochromic Performance Test. Also described is a process for incorporating kinetic enhancing additives into polymeric substrates prior to, after and/or with organic photochromic compounds and the resulting photochromic articles produced by such a process.

Organic photochromic compositions of improved kinetic performance

Removable imbibition composition of photochromic compound and epoxy and polyol kinetic enhancing additives

Described are organic photochromic imbibition compositions that incorporate kinetic enhancing additive(s). Kinetic enhancing additives include epoxy-containing compounds, organic polyols and/or plasticizers that improve the performance of organic photochromic compounds as determined in the Photochromic Performance Test. Also described is a process for incorporating kinetic enhancing additives into polymeric substrates with organic photochromic compounds and the resulting photochromic articles produced by such a process.

Removable imbibition composition of photochromic compound and kinetic enhancing additive

Described is a process for producing adherent layer(s) on organic polymeric substrates following the steps of (a) treating the surface of the polymeric substrate to provide reactive groups; (b) applying to the surface a polymerizable composition of organic anhydrides, isocyanates and/or a mixture thereof that is substantially free of organosiloxanes; and (c) curing the polymerizable coating. Further steps include applying an additional layer which is substantially free of organosiloxanes and that may or may not contain the polymerizable composition of the present invention. Also described are products produced by the process that may be transparent, tinted, tinted and polarized or photochromic.

Process for producing an adherent polymeric layer on polymeric

Describes a composition of a carrier, e.g., organic solvent or polymeric host material, photochromic naphthopyran material, and a stabilizer system comprising (a) polyphenolic antioxidant material, (b) ultraviolet light absorber and (c) hindered amine light stabilizer for said photochromic naphthopyran material. The stabilizer system is selected and used in amounts sufficient to provide at least a 30% reduction in % photopic fatigue of the naphthopyran material. The weight ratio of photochromic naphthopyran to the stabilizer system is from 2.5:1 to 1.5:1. The stabilizer system can comprise 5 to 50 weight percent of the antioxidant material, 5 to 50 weight percent of the ultraviolet light absorbent, and 10 to 90 weight percent of the hindered amine light stabilizer.

Photochromic naphthopyran compositions of improved fatigue resistance

Photochromic optical articles of improved resistance to light fatigue are provided by the use of a combination of hindered amine light stabilizer and asymmetric diaryloxalamide light stabilizer with a mixture of (1) photochromic material having a minima luminous transmission in the range of 560 to 630 nanometers and (2) photochromic material having a minima luminous transmission in the range of 430 to 520 nanometers.

Photochromic compositions of improved fatigue resistance

The yellowness of polymerizates formed form polymerizable compositions containing bisphenol bis(allylic carbonate)-functional material is reduced by inclusion of one or more cyclohexenic compounds in the polymerizable compositions.

Cyclohexenic additives for producing polycarbonate polymers of high

When a solution of liquid allylic-functional material and bromoxylenol blue is polymerized using a thermally decomposable polymerization initiator, the color imparted by the bromoxylenol blue is brilliant yellow.

Internally colored polyol (allyl carbonate) polymerizates

Pourable, polymerizable compositions comprising aromatic-containing poly(allyl carbonate)-functional material, styrenic material, and monomer having three or more allyl, methallyl, acrylyl and/or methacrylyl groups is free radically polymerized to produce polymerizates having high refractive index, high hardness, and low yellowness. The polymerizates are especially useful in the form of ophthalmic lenses.

Composition of aromatic poly(allylcarbonate), styrene materials, and

When a solution of liquid allylic-functional material and dye comprising molybdenum dioxydichloride and molybdenum hexacarbonyl in combination is polymerized using a thermally decomposable polymerization initiator, the color imparted by the combination of the two molybdenum compounds remains essentially stable during the polymerization.

Internally colored polyol (allyl carbonate) polymerizates comprising

Disclosed is a method of preparing a thick casting of polyol (allyl carbonate) by preparing a monolithic, partially cured, first polymerizate of polyol (allyl carbonate), forming a pool of polyol (allyl carbonate) monomer in contact with the monolithic, partially cured, first polymerizate, and thereafter forming a thick, single phase polyol (allyl carbonate) polymer. Also disclosed is the polymer prepared therefrom.

Thick polyol (allyl carbonate) polymerizates and method of preparing same

Tungsten hexacarbonyl acts as a photochromic agent and an infrared absorber when incorporated in liquid allyl glycol carbonates, such as allyl diglycol carbonate, and polymerizates thereof. Photochromic, infrared-absorbing optical and ophthalmic lenses containing tungsten derived from tungsten hexacarbonyl are made.

Growing community of inventors

Murrysville, PA, United States of America

Michael S Misura