Diaryl-2H-naphthopyrans

Details Diaryl-2H-naphthopyrans Diaryl-2H-naphthopyrans

1998-07-31

2000-03-14

Lambkin, Deborah C.

Compositions

Light transmission modifying compositions

Displaying color change

524110, 549389, 548143, 548217, 548238, G02B 523, C08K 515, C07D31192, C07D27110

Patent

active

06036890&

ABSTRACT:
Photochromic diaryl-2H-naphthopyran structures, which dye photochromically well at room temperature, lighten up quickly when incorporated into ophthalmic lenses, possess longevity, and due to their spacial structures, have a reduced tendency of the molecules to migrate in plastics.

REFERENCES:
patent: 3567605 (1971-03-01), Becker
patent: 5066818 (1991-11-01), Gemmert et al.
patent: 5466398 (1995-11-01), Van Gemmert et al.
patent: 5623005 (1997-04-01), Rickwood et al.
patent: 5628935 (1997-05-01), Hughes et al.
patent: 5707557 (1998-01-01), Melzig et al.
patent: 5744070 (1998-04-01), Kumar
patent: 5759450 (1998-06-01), Hughes et al.

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