Fluoranthenopyrans

Details Fluoranthenopyrans Fluoranthenopyrans

1997-10-01

1999-04-06

Kight, John

Compositions

Light transmission modifying compositions

Displaying color change

5248487-, 5249496-, 524100104-, 524110, 544132141-, 544143145-, 544146147-, 544148152-, 544153154-, 544238356-, 544366369-, 544373375-, 5483114-364.4, 548454525-, 549213331-, 549382, G02B 523, C07D31178, C07D30500, C08J 515

Patent

active

058913688

ABSTRACT:
Described are novel photochromic 8-substituted fluoranthenopyran compounds having certain substituents at the 5 position of the pyran 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.

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