Sun protecting emulsion provided with a foam dispenser
View Patent ↗A system for dispensing a foamed aqueous emulsion is provided. The system is a foam-dispensing container and an aqueous emulsion of an oil component with improved foamability. The foamability is improved by including in the emulsion a polyol poly-12-hydroxystearate surfactant as an emulsifier. The aqueous emulsion contains polyol poly-12-hydroxystearate, an oil component, other surfactants and can contain UV protection factors, water and optionally other auxiliaries and additives.
1. A foam-producing and dispensing system for dispensing a sun protection emulsion in the form of a foam, comprising: a manually-operated foam dispenser containing a foamable, sun protection water-in-oil emulsion, comprising:
(a) at least one polyol poly-12-hydroxystearate;
(b) an oil component;
(c) at least one surfactant selected from the group consisting of anionic surfactants, zwitterionic surfactants, and mixtures thereof;
(d) a UV protection factor; and
(e) water,
wherein component (a) enhances the foamability of said emulsion, and wherein said emulsion forms a foam when dispensed.
2. The system as claimed in claim 1 wherein the sun protection emulsion comprises:
(a) 2 to 10% by weight of at least one polyol poly-12-hydroxystearate;
(b) 1 to 20% by weight of an oil component;
(c) 0.5 to 10% by weight of at least one surfactant;
(d) 0.5 to 20% by weight of a UV protection factor; and
(e) 30 to 80% by weight water.
3. The system as claimed in claim 1 , wherein the at least one polyol poly-12-hydroxystearate (a) comprises poly(12-hydroxystearic acid) polyglycerol ester.
4. The system as claimed in claim 1 , wherein the sun protection emulsion comprises:
(a) 2 to 10% by weight of at least one poly(12-hydroxystearic acid) polyglycerol ester;
(b) 1 to 20% by weight of at least one oil component comprising a dialkyl carbonate;
(c) 0.5 to 10% by weight of a mixture of Cocamidopropylbetaine and a sulfosuccinate;
(d) 0.5 to 20% by weight of a sun protection factor; and
(f) 30 to 80% by weight water.
5. The system as claimed in claim 1 , wherein the sun protection emulsion is dispensed with a gas in compressed form in a foam dispenser.
6. The system as claimed in claim 1 , wherein the sun protection emulsion is dispensed in a foam dispenser comprising a pump mechanism for combining the emulsion with air to form and dispense a foam.
7. The system as claimed in claim 6 , wherein the foam dispenser has an air to liquid mixing ratio of from 5:1 to 30:1.
8. The system as claimed in claim 6 , wherein the foam dispenser has a shot volume of from 0.1 to 1 ml liquid per shot.
9. The system as claimed in claim 6 , wherein the foam dispenser has an outlet passage with a foam generator comprising at least one flat sieve arranged in and substantially transverse to the outlet passage.
10. The system as claimed in claim 6 , wherein the foam dispenser has at least one air inlet into an air pump chamber and the air inlet is protected against the penetration of liquid by a removable protective cap.
11. The system as claimed in claim 6 , wherein the foam dispenser comprises an air pump chamber having a residual volume for collecting residual liquid.