Compositions – Light transmission modifying compositions – Displaying color change
Patent
1998-09-11
1999-10-05
Tucker, Philip
Compositions
Light transmission modifying compositions
Displaying color change
549389, 549 58, 549 60, 549331, 549362, 549382, 548454, 5462804, 5462811, 5462827, G02B 523, C07D31192
Patent
active
059618922
ABSTRACT:
Described are novel photochromic polyalkoxylated naphthopyran compounds, at least one polyalkoxylated substituent of from 2 to 50 alkoxy units per substituent. Specific substituents may also be present on the naphtho, indeno and pyrano portions of the compounds. These compounds may be represented by the following graphic formulae: ##STR1##
REFERENCES:
patent: 4719296 (1988-01-01), Irie et al.
patent: 5458814 (1995-10-01), Kumar et al.
patent: 5466398 (1995-11-01), Van Gemert et al.
patent: 5488119 (1996-01-01), Fischer-Reimann et al.
patent: 5520853 (1996-05-01), Rickwood et al.
patent: 5552091 (1996-09-01), Kumar
patent: 5573712 (1996-11-01), Kumar et al.
patent: 5578252 (1996-11-01), Van Gemert
patent: 5585042 (1996-12-01), Knowles
patent: 5637262 (1997-06-01), Van Gemert et al.
patent: 5645767 (1997-07-01), Van Gemert
patent: 5658500 (1997-08-01), Kumar et al.
patent: 5658501 (1997-08-01), Kumar et al.
patent: 5744070 (1998-04-01), Kumar
patent: 5753146 (1998-05-01), Van Gemert et al.
Bradshaw, J.S., et al., "Synthesis of Macrocyclic Acetals Containing Lipophilic Substituents", Tetrahedron, vol. 43, No. 19, pp. 4271-4276, 1987.
Organic Synthesis, vol. 31, pp. 90-92, John Wiley & Sons, Inc., New York, 1951.
Gemert Barry Van
Stewart Kevin J.
Mallak Frank P.
PPG Industries Ohio Inc.
Stein Irwin M.
Tucker Philip
LandOfFree
Polyalkoxylated 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 Polyalkoxylated naphthopyrans, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyalkoxylated naphthopyrans will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1167715