Compositions – Light transmission modifying compositions – Displaying color change
Patent
1997-12-03
2000-08-22
Richter, Johann
Compositions
Light transmission modifying compositions
Displaying color change
549384, G02S 523, C07D31178
Patent
active
06106744&
ABSTRACT:
Described are novel photochromic pyrano-fused naphthopyran compounds, examples of which are naphthopyran compounds having a substituted or unsubstituted "S" pyran ring, the 3,4 positions of which are fused to the f side of the naphtho portion of the naphthopyran, and certain substituents at the 2-position of the "T" pyran ring. Certain substituents may also be present at the number 5, 7, 8, 9, 10, 11 or 12 carbon atoms of the compounds. These compounds may be represented by the following graphic formula: ##STR1## Also described are polymeric organic host materials that contain or that are coated with such compounds or combinations thereof with complementary photochromic compounds, e.g., certain other naphthopyrans, benzopyrans, and spiro(indoline)type compounds.
REFERENCES:
patent: 3361706 (1968-01-01), Meriwether et al.
patent: 3562172 (1971-02-01), Ono et al.
patent: 3567605 (1971-03-01), Becker
patent: 3578602 (1971-05-01), Ono et al.
patent: 3627690 (1971-12-01), Casella et al.
patent: 4215010 (1980-07-01), Hovey et al.
patent: 4342668 (1982-08-01), Hovey et al.
patent: 4816584 (1989-03-01), Kwak et al.
patent: 4818096 (1989-04-01), Heller et al.
patent: 4826977 (1989-05-01), Heller et al.
patent: 4880667 (1989-11-01), Welch
patent: 4931219 (1990-06-01), Kwiatkowski et al.
patent: 4931220 (1990-06-01), Haynes et al.
patent: 5066818 (1991-11-01), Van Gemert et al.
patent: 5238981 (1993-08-01), Knowles
patent: 5274132 (1993-12-01), Van Gemert
patent: 5384077 (1995-01-01), Knowles
patent: 5405958 (1995-04-01), Van Gemert
patent: 5429774 (1995-07-01), Kumar
patent: 5458814 (1995-10-01), Kumar et al.
patent: 5466398 (1995-11-01), Van Gemert et al.
patent: 5514817 (1996-05-01), Knowles
patent: 5552090 (1996-09-01), Van Gemert et al.
patent: 5552091 (1996-09-01), Kumar
patent: 5565147 (1996-10-01), Knowles et al.
patent: 5573712 (1996-11-01), Kumar et al.
patent: 5578252 (1996-11-01), Van Gemert et al.
patent: 5645767 (1997-07-01), Van Gemert
patent: 5674432 (1997-10-01), Knowles et al.
patent: 5811034 (1998-09-01), Lin
Olah et al., Friedel-Crafts and Related Reactions, Interscience Publishers, vol. 3, Chapter XXXI ("Aromatic Ketone Synthesis"), pp. 1-8, 1964.
Ishihara et al., "Regioselective Friedel-Crafts Acylation of 1,2,3,4-Tetrahydroquinoline and Related Nitrogen Heterocycles: Effect on NH Protective Groups and ring Size", J. Chem. Soc. Perkins Trans. 1, 1992, pp. 3401-3406.
Gemert Barry Van
Selvig Christopher D.
Mallak Frank P.
Murray Joseph
PPG Industries Ohio Inc.
Richter Johann
Stein Irwin M.
LandOfFree
Photochromic pyrano-fused naphthopyrans does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photochromic pyrano-fused naphthopyrans, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photochromic pyrano-fused naphthopyrans will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-576899