Sunless tanning products and processes
View Patent ↗Sunless tanning compositions are substantially improved by adding methylsulfonyl methane [MSM] and certain glycols to Dihydroxyacetone (DHA).
1. An improved self-tanning formulation consisting of
(a) methyl sulfonylmethane at a concentration of 1%-20% by weight, based on the total weight of the formulation,
(b) 1,3-dihydroxyacetone, at a concentration of 0.5%-20% by weight, based on the total weight of the formulation
(c) at least one shelf-stable solvent selected from the group consisting of water, ethanol, and volatile organic silicones,
wherein the formulation is in a form selected from the group consisting of a liquid, a foam, a lotion, and a cream, and wherein the improvement consists of
(d) the inclusion in the formulation, as the sole self-tan enhancing glycol humectant either (i) 1,2-pentanediol alone or (ii) 1,2-pentanediol in combination with one or both of isopentyldiol or hexylene glycol.
2. The improved self-tanning formulation of claim 1 wherein methyl sulfonylmethane is present at a concentration of about 5% by weight, based on the total weight of the formulation.
3. The improved self-tanning formulation of claim 1 wherein methyl sulfonylmethane and 1,3-dihydroxyacetone are present at a ratio of about 1:1.
4. The improved self-tanning formulation of claim 1 wherein the sole self-tan enhancing glycol humectant is present at a concentration of from about 4% to about 8% by weight, based on the total weight of the formulation.
5. An improved self-tanning formulation consisting of
(a) methyl sulfonylmethane at a concentration of 1%-20% by weight, based on the total weight of the formulation,
(b) 1,3-dihydroxyacetone, at a concentration of 0.5%-20% by weight, based on the total weight of the formulation
(c) at least one shelf-stable solvent selected from the group consisting of water, ethanol, and volatile organic silicones,
wherein the formulation is in a form selected from the group consisting of a liquid, a foam, a lotion, and a cream, and wherein the improvement consists of
(d) the inclusion in the formulation of isopentyldiol as the sole self-tan enhancing glycol humectant
and further wherein the improved self-tanning formulation produces a tan that is darker, more even and longer-lasting.
6. The improved self-tanning formulation of claim 5 wherein methyl sulfonylmethane is present at a concentration of about 5% by weight, based on the total weight of the formulation.
7. The improved self-tanning formulation of claim 5 wherein methyl sulfonylmethane and 1,3-dihydroxyacetone are present at a ratio of about 1:1.
8. The improved self-tanning formulation of claim 5 wherein the sole self-tan enhancing glycol humectant is present at a concentration of about 8%.