Photochromic compound and optical functional material

Details Photochromic compound and optical functional material Photochromic compound and optical functional material

2007-03-21

2009-12-08

Pyon, Harold (Department: 1796)

Compositions

Light transmission modifying compositions

Displaying color change

C548S148000, C548S202000, C548S235000, C548S335100, C548S563000, C548S564000, C549S083000, C585S016000, C585S024000

Reexamination Certificate

active

07628938

ABSTRACT:
The present invention provides a photochromic compound that is colored when irradiated with visible light and quickly faded when set in a dark place. The photochromic compound according to the present invention is expressed by the following general formula (I):where each of A1, A2and A3is a five-member rings forming a 6π-electron system, the three rings being identical, partially identical or totally different from each other, and each ring may have a substituent; B1and B2are functional groups, each having an atomic number of five or larger, including a ring compound, and bonded to the 2-carbon of each of A2and A3, respectively; and R1, R2and R3are substituents identical to or different from each other. This compound is highly colorable and durable even when it is dispersed into plastic macromolecular materials. Therefore, it is suitable as a dye material for sunglasses or similar products.

REFERENCES:
patent: 1530365 (2004-09-01), None
patent: A-2005-325087 (2005-11-01), None
Tsuyoshi Kawai, Taisuke Iseda and Masahiro Irie, Photochromism of triangle terthiophene derivatives as molecular re-router, Chem. Commun., 2004, 72-73. The manuscript is published by The Royal Society of Chemistry 2004.
Tsuyoshi Kawai, Taisuke Iseda and Masahiro Irie, Photochromism of triangle terthiophene derivatives as molecular re-router, Chem. Commun., 2004, 72-73, The Royal Society of Chemistry 2004.

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