Nanoemulsion based on ethoxylated fatty ether or ethoxylated fatty ester, and use thereof

Abstract

A nanoemulsion comprising a dispersed lipid phase in an aqueous phase with lipid globules having an average size of less than 100 nm contains: (1) a surfactant such as ethoxylated fatty esters or ethers; and (2) at least one oil with a molecular weight of more than 400 and at a lipid phase / surfactant weight ratio of 2-10. Independent claims are also included for: (1) a topical composition comprising the above described composition; (2) an ophthalmic support comprising the above described composition; (3) a pharmaceutical composition comprising the above described composition; (4) a cosmetic method for the care and / or hydration of the skin, mucosa and / or scalp by applying the above described composition; and (5) the preparation of the composition by mixing an aqueous phase and a lipid phase at 10-80 degrees C and homogenizing the mixture at 6 x 10<7>-18 x 10<7> Pa.

Description

technical field [0001] The present invention relates to surfactants based on solids at lower than or equal to 45°C selected from ethoxylated fatty ethers or ethoxylated fatty esters and based on at least one oil with a molecular weight greater than 400 and the weight of the oil phase to the weight of the surfactant Nanoemulsions having a weight ratio in the range of 2 to 10. [0002] The invention also relates to a process for the preparation of said nanoemulsion and to its use in the field of cosmetology, dermatology and / or ophthalmology. The nanoemulsions are stable on storage and can include large amounts of oil while maintaining good clarity and having good cosmetic properties. Background technique [0003] Nanoemulsions are oil-in-water emulsions whose oil droplets are of very fine particle size. That is, the number average size is less than 100 nm. They are usually prepared by a process of mechanical disintegration of an oil phase in an aqueous phase in the presence...