Compositions – Light transmission modifying compositions – Displaying color change
Patent
1999-11-10
2000-09-05
Tucker, Philip
Compositions
Light transmission modifying compositions
Displaying color change
549389, 549331, 549362, 549382, 549 58, 549 60, 546256, 5462804, 5462811, 5462827, 5462774, 5462824, 548454, 524110, 525279, 525403, 351163, G02B 523, C07D31192, G02C 710
Patent
active
061138142
ABSTRACT:
Described are novel photochromic polymerizable polyalkoxylated naphthopyran compounds, examples of which are certain 2H-naphtho[1,2-b]pyrans, 3H-naphtho[2,1-b]pyrans and indeno[2,1-f]naphtho[1,2-b]pyrans each having at least one polyalkoxylated substituent of from 1 to 50 alkoxy units per substituent which is end-capped with a polymerizable group. Specific substituents are also present on the naphtho, indeno and pyrano portions of the compounds. These compounds may be represented by the following graphic formulae: ##STR1## Also described are various substrates, e.g., paper, glass, polymeric organic materials, etc., that contain or that are coated with such compounds. Optically clear articles such as contact lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., certain other naphthopyrans, indenonaphthopyrans, benzopyrans, oxazine-type compounds, etc., are also described.
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Chopra Anu
Gemert Barry Van
Kumar Anil
Mallak Frank P.
Stein Irwin M.
Transitions Optical Inc.
Tucker Philip
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