| US 7,465,415 B2 | ||
| Photochromic materials derived from ring-opening monomers and photochromic initiators | ||
| Feng Wang, Export, Pa. (US); Barry Van Gemert, Murrysville, Pa. (US); Kevin J. Stewart, Murrysville, Pa. (US); Carol L. Knox, Monroeville, Pa. (US); Anu Chopra, Pittsburgh, Pa. (US); and Patrick M. Brown, Moon Township, Pa. (US) | ||
| Assigned to PPG Industries Ohio, Inc., Cleveland, Ohio (US) | ||
| Filed on Jul. 30, 2004, as Appl. No. 10/903,770. | ||
| Prior Publication US 2006/0022176 A1, Feb. 02, 2006 | ||
| Int. Cl. C09K 9/02 (2006.01); C08G 63/08 (2006.01); C08G 63/58 (2006.01); C08G 77/60 (2006.01); C08F 24/00 (2006.01) | ||
| U.S. Cl. 252—586 [252/583; 525/415; 526/269; 528/35; 528/365] | 21 Claims |
| 1. A photochromic material comprising a reaction product of:
(a) at least one ring-opening cyclic monomer chosen from a cyclic ester and a cyclic carbonate; and
(b) a photochromic initiator.
|