申请人:Aoki Hirobumi
公开号:US20100280111A1
公开(公告)日:2010-11-04
An object of the present invention is to provide skin external preparations and cosmetics which contain a branched acyl carnitine and have excellent formulation stability. A skin external preparation of the present invention includes a carnitine derivative represented by the following Formula (1) and/or a carnitine derivative salt represented by the following Formula (2), and an amphoteric surfactant.
In Formula (1), R
1
and R
2
are each independently a C1-18 optionally branched, saturated or unsaturated aliphatic hydrocarbon group. In Formula (2), R
1
and R
2
are the same as in Formula (1), X
−
is a specific anion and Y
+
is a specific cation.
本发明的一个目的是提供含有支链酰基肉碱并具有优异配方稳定性的皮肤外用制剂和化妆品。本发明的皮肤外用制剂包括以下式(1)所表示的肉碱衍生物和/或以下式(2)所表示的肉碱衍生物盐,以及一种两性表面活性剂。在式(1)中,R1和R2分别独立地是C1-18的可选支链、饱和或不饱和脂肪烃基。在式(2)中,R1和R2与式(1)中相同,X−是特定的阴离子,Y+是特定的阳离子。