DIALKYL ETHER-CONTAINING MICRO-EMULSIONS

摘要

In a process for producing micro-emulsions, the oil component is a dialkyl ether with 12 to 24 C atoms in a proportion of at least 30 wt % of the oil phase. Micro-emulsions of the water-in-oil type preferably contain 20 to 60 wt % of the dialkyl ether, 0 to 40 wt % of a second oil component, preferably a fatty acid ester with 12 to 26 C atoms or a hydrocarbon oil, 20 to 35 wt % of a lipophilic non-ionic emulsifier with an HLB value of 6 to 10, 1 to 10 wt % of a hydrophilic non ionic or a water-soluble ionic tenside, 1 to 10 wt % of a diol or polyol with 2 to 6 C atoms and 1 to 20 wt % of water. Corresponding micro-emulsions of the oil-in-water type contain 3 to 30 wt % of the dialkyl ether , 0 to 20 wt % of a second oil component, 10 to 20 wt % of a lipophilic non-ionic emulsifier with an HLB value of 6 to 10, 1 to 10 wt % of an hydrophilic non-ionic or a water-soluble ionic tenside and 1 to 10 wt % of a diol or polyol. The micro-emulsions of the invention are suitable as supports for cosmetic and pharmaceutical preparations.