Photochromic six-membered heterocyclic-fused naphthopyrans

Details Photochromic six-membered heterocyclic-fused naphthopyrans Photochromic six-membered heterocyclic-fused naphthopyrans

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.

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