The present invention relates generally to nanocapsules having a core-envelope structure where the core contains a lipophilic active agent and the envelope contains at least one polyester polyol obtained by polycondensation of an aliphatic dicarboxylic acid with at least two alkanediols or with at least one alkanediol and at least one hydroxyalkyl alkanediol. These nanocapsules make it possible to stabilize lipophilic active agents that are difficult to stabilize, especially retinol esters such as retinyl propionate.
本发明一般涉及具有内核-外包层结构的纳米胶囊,其中内核含有亲脂性活性剂,外包层含有至少一种聚酯多元醇,该多元醇由脂肪族二
羧酸与至少两种烷二醇或至少一种烷二醇和至少一种羟基烷二醇缩聚而成。这些纳米胶囊可以稳定难以稳定的亲脂性活性剂,特别是
视黄醇酯,如
丙酸视黄醇酯。