O/W emulsifier, O/W emulsion and applications thereof
View Patent ↗The invention concerns an O/W emulsifier, an O/W emulsion prepared therefrom and the uses thereof. According to the invention the O/W emulsifier contains (a) 70 to 90 wt. % of glyceryl oleate citrate and (b) 10 to 30 wt. % of a viscosity modifier having a viscosity in the range from 1 to 10,000 mPas.
1. O/W emulsifier containing
(a) 70 to 90 wt. % of glyceryl oleate citrate and
(b) 10 to 30 wt. % of a viscosity modifier having a viscosity in the range from 1 to 10,000 mPas.
2. O/W emulsifier according to claim 1 , characterised in that the glyceryl oleate citrate is an ester of monooleic and/or dioleic acid glycerides with citric acid.
3. O/W emulsifier according to claim 2 , characterised in that the glyceryl oleate citrate is obtainable by esterification of citric acid with monooleic acid glyceride in a molar ratio of 0.3:1 to 1.5:1.
4. O/W emulsifier according to claim 3 , characterised in that the molar ratio is in the range from 0.7:1 to 1.2:1.
5. O/W emulsifier according to claim 1 , characterised in that the glyceryl oleate citrate is fully neutralised.
6. O/W emulsifier according to claim 1 , characterised in that the glyceryl oleate citrate has a pH in the range from 5 to 8.
7. O/W emulsifier according to claim 6 , characterised in that the pH is in the range from pH 5.8 to pH 6.2.
8. O/W emulsifier according to claim 7 , characterised in that the pH is 6.0.
9. O/W emulsifier according to claim 1 , characterised in that the glyceryl oleate citrate has an HLB value in the range from 9 to 15.
10. O/W emulsifier according to claim 9 , characterised in that the HLB value is in the range from 11 to 13.
11. O/W emulsifier according to claim 1 , characterised in that the proportion of glyceryl oleate citrate in the O/W emulsifier is in the range from 75 to 85 wt. %.
12. O/W emulsifier according to claim 11 , characterised in that the proportion of glyceryl oleate citrate in the O/W emulsifier is 80 wt. %.
13. O/W emulsifier according to claim 1 , characterised in that the viscosity of the viscosity modifier is in the range from 1 to 1000 mPas.
14. O/W emulsifier according to claim 13 , characterised in that the viscosity of the viscosity modifier is in the range from 1 to 100 mPas.
15. O/W emulsifier according to claim 1 , characterised in that the viscosity modifier is a native oil.
16. O/W emulsifier according to claim 1 , characterised in that the viscosity modifier is a caprylic/capric triglyceride.
17. O/W emulsifier according to claim 16 , characterised in that the caprylic acid content is 50 to 72 wt. % and the capric acid content is 26 to 45 wt. %, relative in each case to the fatty acids contained in the triglyceride.
18. A method comprising the incorporation of an O/W emulsifier according to claim 1 in cosmetic or dermatological compositions.
19. A method according to claim 18 wherein said glycerol oleate citrate in said O/W emulsifier is incorporated in a quantity sufficient for complexing metal traces in lipophilic systems, or as a solution aid for antioxidants and wherein said composition is a skin care or makeup product.
20. A method according to claim 18 , characterised in that the cosmetic or dermatological composition is an emulsion and the O/W emulsifier content in the overall formulation is 2 to 5 wt. %.
21. O/W emulsion containing an O/W emulsifier according to claim 1 .