Photochromic compound

Details Photochromic compound Photochromic compound

1992-06-23

1994-03-22

Gerstl, Robert

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548469, 548546, 548547, 549 60, 549252, C07D41306

Patent

active

052966070

ABSTRACT:
In chemical structure of a fulgide type photochromic compound having the following general formula; ##STR1## introduction of electron donative groups into its heteroaromatic structure is effective in improving the long wave length sensitivity without any lowering in its thermal stability. Thanks to such combined functional properties, the products are advantageously used for optical recording media, copying media, printing media, optical filters and display materials.

REFERENCES:
patent: 4220708 (1980-09-01), Heller
patent: 4845240 (1989-07-01), Hibino

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