申请人:CHEMIPRO KASEI KAISHA, LIMITED
公开号:EP0950655A1
公开(公告)日:1999-10-20
The present invention provides an aminomethylene derivative represented by general formula (I):
wherein A is a cyclic oxo group selected from the group consisting of following general formulae (a), (b), (c), (d) and (e):
wherein R1, R2, R3, R4 and R5 each independently represent H, an alkyl group or the like; R6, R7 and R8 each independently represent an alkyl group or the like; R1 and R2 or R7 and R8 may combine with each other to form a tetramethylene group or the like; R represents an alkyl group optionally containing OH or O; and n is an integer of 0 to 4, a process for the same, and the use thereof. The derivatives have an excellent ultraviolet absorption ability and a high optical stability.
本发明提供一种由通式(I)表示的亚氨基亚甲基衍生物:
其中 A 是选自以下通式(a)、(b)、(c)、(d)和(e)所组成的组的环状氧代基团:
其中 R1、R2、R3、R4 和 R5 各自独立地代表 H、烷基或类似基团;R6、R7 和 R8 各自独立地代表烷基或类似基团;R1 和 R2 或 R7 和 R8 可相互结合形成四亚甲基或类似基团;R 代表任选含有 OH 或 O 的烷基;n 为 0 至 4 的整数。这些衍生物具有出色的紫外线吸收能力和较高的光学稳定性。