Robert J. Bowles - Palm Harbor FL Nancyanne Gruchacz - Largo FL Shanti Swarup - Allison Park PA Jeanine A. Conklin - Swissvale PA Robert W. Walters - Pittsburgh PA Robin Hunt - Pittsburgh PA
Assignee:
PPG Industries Ohio, Inc. - Cleveland OH
International Classification:
B32B 2700 B32B 2740
US Classification:
4284231
Abstract:
Described are photochromic polyurethane coatings that meet commercially acceptable "cosmetic" 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. sup. 2 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.
Isbn (Books And Publications)
Retailisation : The Here, There and Everywhere of Retail