Compositions – Light transmission modifying compositions – Displaying color change
Patent
1999-03-19
2000-02-08
Tucker, Philip
Compositions
Light transmission modifying compositions
Displaying color change
544 89, 544247, 544150, 544375, 549274, 549277, 549278, 549 58, 549 60, 5462824, 5462831, 548454, 548525, 548196, G02B 523, C07D26512, C07D23900, C07D31900, C07D31178
Patent
active
060224975
ABSTRACT:
Described are novel photochromic six-membered heterocyclic-fused naphthopyran compounds, examples of which are naphthopyran compounds having a substituted or unsubstituted six-membered heterocyclic group fused to one side of the naphtho portion of the naphthopyran and having certain substituents at the position ortho to the oxygen atom of the naphthopyran ring. 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: 3567605 (1971-03-01), Becker
patent: 3627690 (1971-12-01), Casella et al.
patent: 4818096 (1989-04-01), Heller et al.
patent: 5066818 (1991-11-01), Van Gemert et al.
patent: 5429774 (1995-07-01), Kumar
patent: 5458814 (1995-10-01), Kumar et al.
patent: 5552091 (1996-09-01), Kumar
patent: 5565147 (1996-10-01), Knowles et al.
patent: 5645767 (1997-07-01), Van Gemert
patent: 5674432 (1997-10-01), Knowles et al.
patent: 5783116 (1998-07-01), Lin
patent: 5840926 (1998-11-01), Hughes
patent: 5869662 (1999-02-01), Hughes
Mallak Frank P.
PPG Industries Ohio Inc.
Stein Irwin M.
Tucker Philip
LandOfFree
Photochromic six-membered heterocyclic-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 six-membered heterocyclic-fused naphthopyrans, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photochromic six-membered heterocyclic-fused naphthopyrans will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1678328