Tanning compositions including dihydroxyacetone
Embodiments disclosed relate to self-tanning compositions that include at least 0.1 weight percent dihydroxyacetone and at least 1 weight percent water in an internal phase in addition to an external phase formulated to provide a solid body, and the self-tanning composition is stable at ambient temperatures.
1. A self-tanning composition, comprising:
a solid body in stick form including a water in oil emulsion, the water in oil emulsion including:
an external phase including waxes and one or more of gellants, emollients, emulsifiers, or skin penetration enhancers, wherein the waxes are 10 wt % to 25 wt % of the water in oil emulsion; and
an internal phase including water and dihydroxyacetone in monomer form;
wherein the water is 25 wt % to 50 wt % of the water in oil emulsion, dihydroxyacetone is 8 wt % to 15 wt % of the water in oil emulsion, and the solid body is stable at ambient temperatures.
2. The self-tanning composition of claim 1 , wherein the water is 25 wt % to 40 wt % of the water in oil emulsion.
3. The self-tanning composition of claim 1 , wherein the water is 30 wt % to 40 wt % of the water in oil emulsion.
4. The self-tanning composition of claim 1 , wherein the water is 30 wt % to 50 wt % of the water in oil emulsion.
5. The self-tanning composition of claim 1 , wherein the dihydroxyacetone is 8 wt % to 10 wt % of the water in oil emulsion.
6. The self-tanning composition of claim 1 , wherein the dihydroxyacetone is 10 wt % to 15 wt % of the water in oil emulsion.
7. The self-tanning composition of claim 1 , wherein:
the water is 25 wt % to 40 wt % of the water in oil emulsion; and
the dihydroxyacetone is 10 wt % to 15 wt % of the water in oil emulsion.
8. The self-tanning composition of claim 1 , wherein the internal phase includes:
30 wt % to 40 wt % water; and
one or more of 0.5 wt % to 2 wt % of at least one preservative, 2 wt % to 5 wt % dimethyl isosorbide, 1 wt % to 3 wt % erythrulose, and 3 wt % to 8 wt % glycerin.
9. The self-tanning composition of claim 1 , wherein the internal phase has a pH of 3 to 7.
10. A self-tanning composition comprising:
a wax body including 8 wt % to 15 wt % dihydroxyacetone, 10 wt % to 25 wt % wax, and 25 wt % to 50 wt % solvent therein, the wax body being in solid stick form;
wherein the dihydroxyacetone is dissolved in the solvent and maintained in monomer form in the solvent within the wax body.
11. The self-tanning composition of claim 10 , further comprising 0.1 wt % to 10 wt % of at least one glycerin and 0.1 wt % to 9 wt % erythrulose therein.
12. The self-tanning composition of claim 10 , wherein the wax body includes one or more of synthetic wax, Euphorbia cerifera (candelilla) wax, ozokerite, neopentyl glycol diethylhexanoate, isononyl isononanoate, isosorbide dicaprylate, dimethicone, dimethicone/polyglycerin-3 crosspolymer dimethicone, or PEG-9 polydimethylsiloxyethyl dimethicone, a gellant, or paraffin wax therein.
13. The self-tanning composition of claim 10 , wherein the dihydroxyacetone and solvent are dispersed substantially homogenously throughout the wax body.
14. The self-tanning composition of claim 10 , wherein the solvent includes one or more of water or propylene glycol.