Emulsifying composition comprising a water-in-oil emulsifier and a cyclodextrin of selected particle size, capable of providing an oil-in-water emulsion with improved sensory effects for cosmetic use
AssigneeRoquette Freres
InventorLéon MENTINK
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Abstract
The present invention relates to a sensory emulsifying composition, in particular for cosmetic use, capable of obtaining a liquid oil-in-water-type emulsion comprising at least one cyclodextrin in the form of solid particles, said particles having a volumetric average particle 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 water-in-oil emulsifiers, having a hydrophilic-lipophilic balance (HLB) of less than 8.
Claims15
An emulsifying composition, preferably for cosmetic use, capable of obtaining a liquid oil-in-water-type emulsion comprising:
- a) at least one cyclodextrin in the form of solid particles, said particles having a volumetric average particle 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 water-in-oil-type emulsifiers, having a hydrophilic-lipophilic balance of less than 8, most preferably of less than or equal to 7.
A liquid emulsion, preferably oil-in-water Pickering, wherein said liquid emulsion comprises at least one cyclodextrin in the form of solid particles, said particles having a volumetric average particle 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 water-in-oil emulsifiers, having a hydrophilic-lipophilic balance of less than 8, most preferably of less than or equal to 7, in an emulsifier/cyclodextrin ratio of between 0.01:1 and 1:1, preferably of between 0.15:1 et 0.30:1.
A method for manufacturing a liquid emulsion, preferably oil-in-water Pickering, 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 volumetric average particle 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 water-in-oil-type emulsifiers, having a hydrophilic-lipophilic balance of less than 8, most preferably of less than or equal to 7, in an emulsifier/cyclodextrin ratio of between 0.01:1 and 1:1, preferably 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, with respect to the total weight of the composition, under stirring to enable the dispersion of the fatty phase in the aqueous phase in the form of droplets with an average size of less than or equal to 30 μm, preferably of less than or equal to 10 μm.
A combined use of at least one cyclodextrin in the form of solid particles having a volumetric average particle 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 water-in-oil-type emulsifiers, having a hydrophilic-lipophilic balance of less than 8, most preferably of less than or equal to 7, in a liquid emulsion for cosmetic use to provide said emulsion with a softer and smoother feel, make said emulsion easier to spread, and to reduce or eliminate pilling
Dependencies are inferred from the claim text.