Patent ID: 7166357
Filing Date: 2007-01-23
Classification: C07D,C09K,Y10T

Abstract:
1. A photochromic article comprising: a) a substrate; and b) a photochromic amount of at least one organic photochromic material (b) adapted to change from an unactivated form to an activated form by exposure to radiation substantially in the wavelength range from 380 to 410 nanometers when measured over a range of from 380 to 700 nanometers, said photochromic article being adapted to retain at least 12 percent of the delta OD measured in the Outdoor Test when tested in the Behind the Windshield Test, said photochromic material (b) being represented by the following graphic formula XIII:  wherein, (aa) R wherein each R 28 , R 29 and R 30 being chosen independently for each occurrence in each formula from hydrogen, C 1 –C 5 alkyl, phenyl or naphthyl; or the groups R 28 and R 29 together form a ring of 5 to 8 carbon atoms; R 27 being chosen independently for each occurrence from C 1 –C 6 alkyl, C 1 –C 6 alkoxy, fluoro or chloro and q being chosen from the integer 0, 1 or 2; (bb) R (cc) R wherein -G being chosen from —C(O)— or —CH 2 —, G′ being chosen from C 1 –C 3 alkoxy or a polymerizable group, x, y and z each being independently chosen from a number between 0 and 50, and the sum of x, y and z being between 2 and 50; or (dd) R (ee) R (ff) R (gg) B and B′ are each independently chosen from