Photochromic six-membered heterocyclilc-fused naphthopyrans

Details Photochromic six-membered heterocyclilc-fused naphthopyrans Photochromic six-membered heterocyclilc-fused naphthopyrans

2000-02-07

2000-11-28

Tucker, Philip

Compositions

Light transmission modifying compositions

Displaying color change

544 95, 544 70, G02B 523, C07D49800, C07D29500

Patent

active

06153126&

ABSTRACT:
Described are novel photochromic six-membered heterocyclic-fused naphthopyran compounds, examples of which are naphthopyran compounds having an oxazino 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.

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