The invention concerns clear o/w microemulsions comprising a perfume oil, an aqueous phase and one or more surfactants with HLB between 9 and 18, and co-surfactants of which at least 0.5% of ionic co-surfactant. The weight ratio of perfume oil to total surfactant is between 0.85 and 2.5, and preferably above 1 . The quantity of perfume oil is 0.01-40% w/w, preferably below 35%, of the microemulsion and the quantity of water at least 40% w/w, preferably at least 50%. The microemulsions comprise less than 10%, preferably less than 5%, of alcohol. The surfactants are preferably of the nonionic type.
The microemulsions are very suitable for perfuming purposes where the amount of organic solvents should preferably be kept to a minimum, such as for perfuming skin or hair.
The invention also concerns surfactant/perfume oil mixtures suitable for preparing the clear o/w microemulsions.
本发明涉及透明的
水包油型微乳液,包括香
水油、
水相、一种或多种 HLB 在 9 至 18 之间的表面活性剂以及助表面活性剂,其中离子型助表面活性剂至少占 0.5%。香
水油与全部表面活性剂的重量比在 0.85 和 2.5 之间,最好在 1 以上。香
水油的量为微乳液的 0.01-40%(重量百分比),最好低于 35%,
水的量至少为 40%(重量百分比),最好至少为 50%。微乳液中的
酒精含量低于 10%,最好低于 5%。表面活性剂最好是非离子型的。
微乳剂非常适合用于有机溶剂用量应保持在最低
水平的香
水用途,例如用于皮肤或头发的香
水。
本发明还涉及适用于制备透明
水包油型微乳剂的表面活性剂/香油混合物。