申请人:Izumi Shinobu
公开号:US20100230648A1
公开(公告)日:2010-09-16
A chromene compound represented by the following formula (1),
wherein R
1
, R
2
, R
3
and R
4
are, respectively, hydrogen atoms, alkyl groups, aryl groups, or the like groups under a condition that at least two of R
1
to R
4
are not hydrogen atoms,
R
5
, R
6
, R
7
and R
8
are, respectively, alkyl groups, aryl groups or the like groups,
m and n are, respectively, integers of 0 to 4, and
x and y are, respectively, integers of 0 to 5.
The compound has a basic structure in which a 6-membered ring is condensed in a form of shearing a carbon atom at the fifth position and a carbon atom at the sixth position of a 2H-benzo[h]chromene skeleton. Owing to this molecular structure, the chromene compound of the invention develops a yellow color or a neutral tint by itself, exhibits favorable photochromic properties, and does not exhibit deteriorated photochromic properties even when it is used in combination with a photopolymerization initiator.