Compositions – Light transmission modifying compositions – Displaying color change
Patent
1995-11-29
1996-11-26
Tucker, Philip
Compositions
Light transmission modifying compositions
Displaying color change
549389, 549 43, 549 44, 549 48, 549365, 549366, 546196, 548454, G02B 523, C07D31192
Patent
active
055782523
ABSTRACT:
Described are novel reversible photochromic 3H-naphtho[2,1-b]pyran compounds, examples of which are substituted with an oxy-bearing substituent at the number 8 carbon atom and with either an alkyl group at the number 7 carbon atom or with a carbonyl bearing substituent at the number 9 carbon atom and certain substituents at the 3-position of the pyran ring, e.g., 3,3-spirofluoren-9-ylidene 8-methoxy-9-carbomethoxy-3H-naphtho[2,1-b]pyran. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro(indoline) type compounds, are also described.
REFERENCES:
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: 4637698 (1987-01-01), Kwak et al.
patent: 4720356 (1988-01-01), Chu
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: 5066818 (1991-11-01), Van Gemert
patent: 5200116 (1993-04-01), Heller
patent: 5238981 (1993-08-01), Knowles
patent: 5451344 (1995-09-01), Knowles et al.
patent: 5466398 (1995-11-01), Van Gemert et al.
George A. Olah, Friedel-Crafts and Related Reactions, Interscience Publishers, vol. 3, Chap. XXXI, pp. 1-8, 82-88, 1964.
"1, 8, 17, 24-Tetroxa[8.8](2,6)naphthalenophane-3, 5, 19, 21-tetrayne-10, 30-dicarboxylic Acid Derivatives, Novel Complexors of Aromatic Guests, Esa T. Jarvi et al", J. Am Chem. Soc. 1982, 104, 7196-7204.
Gemert Barry Van
Kumar Anil
Mallak Frank P.
Stein Irwin M.
Transitions Optical Inc.
Tucker Philip
LandOfFree
Photochromic substituted naphthopyran compounds 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 substituted naphthopyran compounds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photochromic substituted naphthopyran compounds will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1970755