Fluorone and pyronin y derivatives

Details Fluorone and pyronin y derivatives Fluorone and pyronin y derivatives

1993-11-19

1995-09-19

Wu, Shean

Compositions

Light transmission modifying compositions

430270, 430345, 430914, 430921, 430923, 430925, F21V 900, G03C 1725

Patent

active

054513430

ABSTRACT:
The present invention relates to a novel class of compounds which absorb light at wavelengths greater than 350 nm and are useful as fluorescers or as photoinitiators. The present invention provides compounds of the formulas (I) and (II) and their equivalents (the nomenclature of the compounds used herein is based on the numbering of positions as shown in formula (I)): ##STR1## where: when W is .dbd.O, W.sup.1 is hydrogen or --OR.sup.9 and when W is .dbd.NR.sup.+.sub.2, W is hydrogen or NR.sub.2.sup.+2, A is hydrogen, alkenyl, alkyl or an election withdrawing group, and the remaining groups are as defined in the disclosure.

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