申请人:Izumi Shinobu
公开号:US20140154527A1
公开(公告)日:2014-06-05
A chromene compound having a short fading half period, especially, a short fading half period even at a low temperature in a general-purpose polymer solid matrix.
The chromene compound is represented by the following formula (
1
).
wherein R
1
is a hydroxyl group or the like, R
2
and R
3
are each an aryl group or the like, C* is a spiro carbon atom,
a spiro ring A represented by the following formula is a saturated hydrocarbon ring having 4 to 12 ring member carbon atoms or the like, and at least one ring member carbon atom constituting the ring A is a group represented by the following formula (4), and X is a divalent group such as arylene group,
wherein R
7
and R
8
are each a cycloalkyl group or the like.
具有短的褪色半衰期的香豆素化合物,特别是在通用聚合物固体基质中,即使在低温下也具有短的褪色半衰期。该香豆素化合物由以下式子(1)表示,其中R1为羟基或类似物,R2和R3分别为芳基或类似物,C*为螺碳原子,由以下式子表示的螺环A为具有4至12个环成员碳原子或类似物的饱和碳氢环,且构成环A的至少一个环成员碳原子为以下式子(4)所表示的基团,X为二价基团,例如芳基烷基,其中R7和R8分别为环烷基或类似物。