The ultraviolet absorbing composition in accordance with the present invention comprises the following ingredients (A) and (B):
(A) 4-tert-butyl-4'-methoxydibenzoylmethane; and
(B) a diester which is liquid at 20°C and has a structure represented by the following general formula (1):
R1OOC-(CH2)n-COOR2 (1)
wherein each of R1 and R2 is an alkyl group, an alkenyl group, a hydroxyalkyl group, or a hydroxyalkenyl group each having 1 to 19 carbon atoms, and n is an integer of 0 to 6.
In the present invention, crystals of (A) are prevented from depositing by using a diester of (B) togetherwith and an ultraviolet absorbing composition in which (A) can be stably compounded in a high concentration and which exhibits excellent feel of use and safety can be obtained thereby.
根据本发明,紫外线吸收组合物包括以下成分(A)和(B):
(A) 4-叔丁基-4'-甲氧基二苯甲酰
甲烷;和
(B) 二酯,在 20°C 时为液态,其结构由以下通式(1)表示:
R1OOC-(
CH2)n-COOR2 (1)
其中 R1 和 R2 各为具有 1 至 19 个碳原子的烷基、烯基、羟基烷基或羟基烯基,n 为 0 至 6 的整数。
在本发明中,通过使用(B)的二酯和(A)的二酯,可以防止(A)的结晶沉积,并由此获得一种紫外线吸收组合物,其中(A)可以高浓度稳定地复配,并且具有极佳的使用感和安全性。