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US 6,306,380 B1Granted
Cosmetic depilatory compositions comprising a continuous aqueous phase and an oil phase
AssigneeReckitt & Colman France
InventorsSarah Desmots, Bruno Guillaume, Philippe Ledon, Veronique Pires
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Abstract
The invention provides depilatory compositions comprising: (a) a continuous aqueous phase; (b) a depilatory agent; and (c) at phase comprising (i) a non-polar coil separated from the continuous aqueous phase by a bilayer phase comprising (ii) a surfactant; (iii) a polar substance; wherein the composition is substantially free from tertiary amines; processes for their preparation; and their use degrading hair keratin.
Claims17
A depilatory composition in the form of an oil-in-water emulsion which comprises:
- from 2% to 6% w/w of a depilatory agent;
- from 4.7% to 66% w/w of an oil phase comprising, as a percentage of the depilatory composition,
- from 0.2% to 20% w/w of a non-polar oil in the form of droplets having a diameter of from 0.01 to 10 μm and a polarity index of from 20 to 40 mN/m,
- from 2% to 20% w/w of a surfactant having a HLB value of from 9 to 12, and
- from 0.5% to 20% of a polar substance having a polarity index of from 2 to 15 mN/m,
- the oil phase having a RHLB value of from 9 to 12;
- and
- from 5.3% to 34% of an aqueous phase comprising L-arginine and lime as pH regulators,
- wherein the depilatory agent is present in both the oil phase and the aqueous phase and the depilatory composition is substantially free from tertiary amines.
6 more elements
A method for removing unwanted hair which comprises the steps of:
- (1) applying to an area of the body from which depilation is desired a depilatory composition in the form of an oil-in-water emulsion which comprises:
- from 2% to 6% w/w of a depilatory agent;
- from 4.7% to 66% w/w of an oil phase comprising, as a percentage of the depilatory composition,
- from 0.2% to 20% w/w of a non-polar oil in the form of droplets having a diameter of from 0.01 to 10 μm and a polarity index of from 20 to 40 mN/m,
- from 2% to 20% w/w of a surfactant having a HLB value of from 9 to 12, and
- from 0.5% to 20% of a polar substance having a polarity index of from 2 to 15 mN/m,
- the oil phase having a RHLB value of from 9 to 12;
- and
- from 5.3% to 34% of an aqueous phase comprising L-arginine and lime as pH regulators,
- wherein the depilatory agent is present in both the oil phase and the aqueous phase and the depilatory composition is substantially free from tertiary amines;
- (2) allowing said composition to remain on the skin for sufficient time to degrade keratin present in said hair;
- and (3) removing said composition together with the unwanted hair.
9 more elements
Dependencies are inferred from the claim text.