申请人:SHISEIDO COMPANY, LTD.
公开号:EP2082729A1
公开(公告)日:2009-07-29
The present invention was made in view of the above-described circumstances, and an object of the invention is to provide an external skin preparation having a rough skin improving effect, excellent in texture in use, especially excellent in smoothness, free of sticky feeling, and excellent in stability. Another object is to provide a skin cleanser excellent especially in usability and a cosmetic removing effect.
That is, the external skin preparation of the present invention is characterized by comprising a block-type alkylene oxide derivative represented by the below-described formula (I).
[formula 1] Y-[O(EO)a-(AO)b-(EO)o-R]k (I)
(In the formula, Y is the residue given by removing hydroxyl groups from a polyhydric alcohol having 3 to 6 hydroxyl groups, and k is the number of hydroxyl groups of the polyhydric alcohol. EO is an oxyethylene group, AO is an oxyalkylene group having 3 to 6 carbon atoms, and they are attached in a block-type, respectively. The products, a×k, b×k, and c×k, are the average addition mole numbers of the oxyethylene group, the oxyalkylene group having 3 to 6 carbon atoms, and the oxyethylene group, respectively, and 0 ≦a×k≦ 100, 1≦b×k≦ 100, and 0≦c×k≦ 100, however, (a+c)×k>1. The percentage of all oxyethylene groups in formula (I) with respect to the sum of all oxyethylene groups and oxyalkylene groups having 3 to 6 carbon atoms in formula (I) is 10 to 80 mass %. Rs may be either identical to or different from each other, and they are hydrocarbon groups with 1 to 4 carbon atoms.)
The skin cleanser of present invention is characterized by comprising 0.01 to 70 mass % of a block-type alkylene oxide derivative represented by the above-described formula (I) and 0.1 to 20 mass % of a moisturizer.
本发明是鉴于上述情况而提出的,其目的是提供一种外用皮肤制剂,该制剂具有改善皮肤粗糙的效果,使用时质地优良,特别是光滑度优良,无粘腻感,稳定性优良。本发明的另一个目的是提供一种皮肤清洁剂,其使用性和化妆品去除效果尤为出色。
也就是说,本发明的外用护肤制剂的特点是包含由下述式(I)表示的块状环氧烷衍生物。
[式 1] Y-[O(EO)a-(AO)b-(EO)o-R]k (I)
(式中:Y 为从具有 3 至 6 个羟基的多元醇中去除羟基后的残留物,k 为多元醇的羟基数。EO 是氧乙烯基,AO 是具有 3 至 6 个碳原子的氧亚烷基,它们分别以块状连接。产物 a×k、b×k 和 c×k 分别是氧乙烯基、具有 3 至 6 个碳原子的氧亚烃基和氧乙烯基的平均加和摩尔数,且 0 ≦a×k≦100、1≦b×k≦100 和 0≦c×k≦100,但 (a+c)×k>1 。式(I)中所有氧乙烯基团占式(I)中所有氧乙烯基团和具有 3 至 6 个碳原子的氧亚烃基团之和的百分比为 10 至 80 质量%。Rs既可以相互相同,也可以相互不同,它们都是具有 1 至 4 个碳原子的烃基团)。
本发明洁肤剂的特点是含有 0.01 至 70 质量%的由上述式(I)代表的块状环氧烷衍生物和 0.1 至 20 质量%的保湿剂。