Ppg Industries Ohio, Inc.

Ppg Industries, Inc.

Robin L Hunt

Shanti Swarup

Robert W Walters

Robert M Hunia

John D Basil

Jeanine A Conklin

Nancyanne Gruchacz

Robert J Bowles, Iii

Described are photochromic polyurethane coatings that meet commercially acceptable &ldquo;cosmetic&rdquo; standards for optical coatings. Also described are articles having such coatings. The coatings exhibit a Fischer microhardness of from 50 to 150 Newtons per mm,and improved photochromic properties, i.e., the formation of darker activated colors and faster rates of photochromic activation and fade when irradiated with ultraviolet light.

Photochromic polyurethane coating and articles having such a coating

A method of preparing a shaped article having a photochromic coating thereon, and curable photochromic powder coating compositions are described. The method includes: applying at least one curable powder coating composition to at least a portion of the interior of a mold, e.g., a lens mold, wherein at least one of the applied powder coating compositions includes a photochromic amount of photochromic material; curing at least partially the applied photochromic powder coating; charging a polymerizable organic casting composition into the mold; polymerizing the casting composition; and removing a shaped article having a photochromic coating on at least a portion of its surface from the mold.

Method of preparing a shaped article having a photochromic coating

Describes a process for improving the adhesion of polymeric coatings to organic polymeric substrates and photochromic polymeric substrates. The process comprises irradiating the surface of a polymeric substrate prepared from or coated with a monomer composition having acrylic functionality in an oxygen containing environment with ultraviolet light; etching the treated surface; and applying to the etched surface a polymer-forming coating composition. Further described are articles and photochromic articles comprising in combination a polymeric substrate having on at least one surface thereof an adherent coating or photochromic coating prepared by the aforedescribed process.

Process for improving adhesion of coatings to polymeric substrates and

A coating composition containing fluoropolymer adapted for roll coating is provided with a solvent system that is free of isophorone. The solvent system comprises an ester of an aromatic acid, a high molecular weight ketone, a high molecular weight alcohol, a glycol ether ester, and a hydrocarbon solvent having a high evaporation rate.

Isophorone-free fluorocarbon coating composition

A coating composition contains a blend of

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Pittsburgh, PA, United States of America

Robin L Hunt