Photochromic compounds

Details Photochromic compounds Photochromic compounds

1995-12-28

1997-07-08

Owens, Amelia

Compositions

Light transmission modifying compositions

Displaying color change

549 24, 549 25, 549 26, 549 27, 549223, 548131, 548143, G02B 523, C07D31182

Patent

active

056457685

ABSTRACT:
A photochromic compound, in particular, for tinting optical elements made of a plastic material has reduced mobility in plastic material. The photochromic compound is a photochromic 2H-pyran and is distinguished by the aromatic residues being chemically rigidly attached in the 2-position to a spiropyran.

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