Emulsifying composition consisting of an oil-in-water emulsifier and a cyclodextrin of selected particle size, capable of providing an oil-in-water emulsion with improved sensory effects for cosmetic use
OwnerLéon MENTINKinventor
Life of this patent
Estimating the term…
Abstract
The present invention relates to a sensory emulsifying composition, in particular for cosmetic use, capable of making it possible to obtain an oil-in-water-type emulsion, comprising at least one cyclodextrin in the form of solid particles, said particles having a volume-average size d(4,3) measured by laser granulometry, of between 2 and 20 μm, preferably between 3 and 12 μm, and more preferably between 4 and 8 μm; and at least one emulsifier of natural origin selected from oil-in-water emulsifiers, having an HLB greater than or equal to 8, and most preferably greater than or equal to 9.
Claims16
An emulsifying composition, preferably for cosmetic use, capable of obtaining an oil-in-water-type emulsion, comprising:
- a) at least one cyclodextrin in the form of solid particles, said particles having a volume-average size d(4.3) measured by laser granulometry, of between 2 and 20 μm, preferably between 3 and 12 μm, and more preferably between 4 and 8 μm,
- b) and at least one emulsifier of natural origin selected from oil-in-water-type emulsifiers, having a hydrophilic-lipophilic balance greater than or equal to 8, most preferably greater than or equal to 9.
A liquid emulsion, preferably an oil-in-water Pickering emulsion, wherein it contains at least one cyclodextrin in the form of solid particles, said particles having a volume-average size d(4.3) of between 2 and 20 μm, preferably between 3 and 12 μm, and more preferably between 4 and 8 μm, and at least one emulsifier of natural origin selected from oil-in-water-type emulsifiers, having a hydrophilic-lipophilic balance greater than or equal to 8, most preferably greater than or equal to 9, in an emulsifier/cyclodextrin ratio of between 0.01:1 and 1:1, preferably between 0.15:1 and 0.30:1.
A method for manufacturing a liquid emulsion, preferably an oil-in-water Pickering emulsion, comprising the following steps:
- a) dispersing, in an aqueous phase, an emulsifying composition comprising at least one cyclodextrin in the form of solid particles, said particles having a volume-average size d(4.3) measured by laser granulometry, of between 2 and 20 μm, preferably between 3 and 12 μm, and more preferably between 4 and 8 μm,
- and at least one emulsifier of natural origin selected from oil-in-water-type emulsifiers, preferably having a hydrophilic-lipophilic balance greater than or equal to 8, most preferably greater than or equal to 9, in an emulsifier/cyclodextrin ratio of between 0.01:1 and 1:1, preferably of between 0.15:1 and 0.30:1,
- b) adding a fatty phase to the mixture obtained in step a), in an amount of between 10 and 65% by weight, relative to the total weight of the composition, under stirring to allow dispersion of the fatty phase in the aqueous phase in the form of droplets with a number-average size of less than 30 μm, preferably less than or equal to 10 μm.
A combined use of a cyclodextrin in the form of solid particles having a volume-average size d(4.3) measured by laser granulometry, of between 2 and 20 μm, preferably between 3 and 12 μm, and more preferably between 4 and 8 μm,
- and of at least one emulsifier of natural origin selected from oil-in-water-type emulsifiers, having a hydrophilic-lipophilic balance greater than or equal to 8, most preferably greater than or equal to 9, in an emulsion for cosmetic use in order to provide said emulsion with a softer and smoother feel, and to reduce or eliminate pilling.
Dependencies are inferred from the claim text.