Compositions – Light transmission modifying compositions – Displaying color change
Patent
1993-12-09
1995-10-17
Chan, Nicky
Compositions
Light transmission modifying compositions
Displaying color change
549389, 548525, 5483571, 5483114, 548215, 548214, 548200, 546269, 546196, 544375, 544333, 544150, 544 96, 544 60, 544 587, 544 55, 524110, G02B 523, G02B 2700, C07D31192
Patent
active
054588146
ABSTRACT:
Described are novel reversible photochromic naphthopyran compounds, examples of which are compounds having certain substituents at the number 5 and 6 carbon atoms of the naphtho portion of the naphthopyran and at the 2-position of the pyran ring. Certain substituents may also be present at the number 7, 8, 9 or 10 carbon atoms of the naphtho portion of the naphthopyran. 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: 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: 4980089 (1980-12-01), Heller
patent: 4994208 (1991-02-01), McBain et al.
patent: 5066818 (1991-11-01), Van Gemert
patent: 5200116 (1993-04-01), Heller
patent: 5238981 (1993-08-01), Knowles
patent: 5244602 (1993-09-01), Van Gemert
Friedel-Crafts and Related Reactions, George A. Olah, Interscience Publishers, vol. 3. Chap. XXXI, pp. 1-8, 1964.
"Regioselective Friedel Crafts Acylation of 1,2,3,4-Tetrahydroquinoline and Related Nitrogen Heterocycles: Effects of NH Protective Groups and Ring Size", Ishihara, Y., et al, J. Chem. Soc., Perkin Trans. 1, pp. 3401-3406, 1992.
"Synthesis, Conformation, and Complexation Behavior of 2,9,18,25-Tetraoxa[8,8](1,4)napthalenophane", Adams, S. P. et al, J. Org. Chem., vol. 46, pp. 3474-3478, 1981.
Organic Reactions, vol. VI, John Wiley and Sons, Inc. Chapter 1, pp. 1-2 (1951).
Organic Synthesis, vol. 31, John Wiley and Sons, Inc., pp. 90 and 93 (1951).
Organic Synthesis, vol. 32, John Wiley and Sons, Inc., pp. 72 and 77 (1952).
Gemert Barry Van
Knowles David B.
Kumar Anil
Chan Nicky
Mallak Frank P.
Stein Irwin M.
Transitions Optical Inc.
LandOfFree
Substituted 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 Substituted naphthopyrans, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Substituted naphthopyrans will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-594553