Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations
Patent
1998-06-26
1999-12-28
Dodson, Shelley A.
Drug, bio-affecting and body treating compositions
Topical sun or radiation screening, or tanning preparations
424 60, 424400, 424401, A61K 742, A61K 744, A61K 700
Patent
active
060077964
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a cosmetic self-tanning agent based on dihydroxyacetone with a sunscreen effect, making it possible to obtain different color shades on the skin in addition to the sunscreen effect.
It has been known for many years that dihydroxyacetone (DHA) can be used as a tanning agent for human skin. DHA is formulated with various additives to compensate for the disadvantages normally inherent in this product. DHA is known to produce a somewhat unnatural orange color on the skin, and it is also highly reactive with other ingredients of a mixture, decomposes rapidly and has an odor that is unacceptable for cosmetics. In addition, the skin coloring procedure usually takes too long (several hours) and then fades too rapidly (after a few hours to a few days).
A combination of a tanning agent based on DHA and a sunscreen is known from International Patent WO 94/23693, which concerns an O/W emulsion containing 0.1% to 20% DHA, 0.1% to 30% of a sunscreen, selected from a large group of such preparations, and 0.1% to 10% of a cross-linked cationic polymer and 0,1-10% of a cationic emulsifier.
European Patent A 627,214 discloses a self-tanning DHA formulation which also contains a pigment such as an eosin derivative that adheres to the skin.
U.S. Pat. No. 4,217,344 describes a sunscreen and tanning agent based on DHA which also contains tartaric aldehyde and a special dispersion of microspheres.
The object of the present invention is to provide a cosmetic self-tanning agent that is effective in several regards. With the help of a combination of active ingredients, an average sunscreen effect and a self-tanning effect are to be achieved at the same time, with the self-tanning effect being manifested after a short time and lasting a long time, and several different color shades for different skin types can be achieved without additional coloring components due to a difference in formulation of the active ingredients.
This object is achieved according to this invention with a cosmetic self-tanning agent with a sunscreen effect based on dihydroxyacetone, which is characterized in that it contains the following components, based on the total weight of the emulsion: salicylate, octyl methoxycinnamate and benzophenone-3 and mixtures thereof in an amount of 2 to 7.5 percent by weight of the individual components and an amount of 7 to 18.5 percent by weight of the mixture of individual components; DHA and phospholipids with a DHA content of 0.5 to 5 percent by weight, where the amount of liposomal solution is in the range of 1.5 to 25 percent by weight, plus also unencapsulated DHA in an amount of 1 to 4 percent by weight; ascorbic acid, calendula extract and a mixture thereof in an amount of 0.01 to 5.0 percent by weight; phospholipids, sodium hyaluronate, glycerol and mixtures thereof, with the moisturizer(s) in an amount of 0.1 to 16 percent by weight; and based on the weight of the total preparation.
The total amount of the UV filters (a) is preferably in the range of 10 to 16 percent by weight. These UV filters (a) are preferably in a mixture of octyl salicylate, octyl methoxycinnamate and benzophenone-3, where the ratio of components to one another is in the range of 1.0-2.0:0.8-2.5:0.8-2.0. An especially preferred ratio is 1:2:1.
In addition, however, melanin in soluble form (up to approx. 0.05 percent by weight) and butylmethoxydibenzoylmethane (up to 5 percent by weight) may also be used as UV filters.
Other preferred ranges of the above components are 0.8 to 1.8 percent by weight for DHA (b), where the amount of the liposomal solution is in the range of 1.5 to 10.0 percent by weight. The amount of antioxidant (c) is preferably in the range of 0.01 to 0.5 percent by weight, and the amount of moisturizer (d) is preferably in the range of 0.7 to 5 percent by weight.
In a preferred embodiment, aloe vera and phospholipids are present concurrently as moisturizers, and then glycerol or sodium hyaluronate is optionally also present.
According to this invention, a self-tanning effect in natural appearing skin
REFERENCES:
patent: 4217344 (1980-08-01), Vanlerberghe et al.
Macchio Ralph
Menzel Anette
Stanzl Klaus
Zastrow Leonhard
Dodson Shelley A.
Lancaster Group GmbH
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