Photochromic material

Details Photochromic material Photochromic material

2008-04-01

2008-04-01

Wu, Shean C (Department: 1756)

Compositions

Light transmission modifying compositions

C252S586000, C428S913000, C430S138000, C430S270100, C524S087000, C524S095000

Reexamination Certificate

active

07351362

ABSTRACT:
A photochromic material comprising a styrene-based oligomer having a weight average molecular weight of from 200 to 6000 and a photochromic compound selected from the group consisting of spirooxazine derivatives and spiropyran derivatives.

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