FR2635682A1 - Cosmetic composition for application to the skin for reducing the burning sensation on shaving or depilation - Google Patents

Abstract

The cosmetic composition according to the invention comprises as active product hydroxypolyethoxydodecane, advantageously combined with a cutaneous absorption promoter such as, for example, an alkyldimethylbenzylammonium saccharinate, it being possible for the quantities of product to be from 1 to 10 % for the former product and 0.01 to 0.05 % for the latter product (% of the total weight of the composition). The formulations, which contain, in addition, ingredients and excipients which are known per se, can take various forms, such as aqueous suspensions, aqueous-alcoholic lotions, gels, creams, shaving balms, shaving foam etc.

Description

 The present invention relates to the field of cometic compositions intended to be applied to the skin during burns or overheating. It relates more particularly to compositions making it possible to suppress or reduce the burning sensations and the pains at the time of shaving in men and hair removal in women.

 The prevention of skin pain or the treatment of the latter generally use, to date, dermal compositions containing local anesthetics such as for example butoform, ethoform or other products with equivalent function.

 Contact anesthetics often have the disadvantage of general awareness, not just local awareness, as desired. In addition, they are frequently responsible for allergic reactions, the severity of which can range from simple dermatitis to anaphylactic shock.

 The object of the invention is to obviate these drawbacks and to propose cosmetic formulations which do not cause skin irritations and which are particularly advantageous for preventing the pains experienced during epilation and / or shaving sessions both on the face and on the face. other members of the body in both sexes.

 He indeed found, surprisingly and unexpectedly, after numerous research and experimental works, that hydroxypolyethoxydodecane (HDP) - product known for its nonionic surfactant properties - possessed a local anesthetic and analgesic action opposing favorably the pain due to "razor burn" or to that experienced during the epilation of certain members of the human body.

 I1 was also found that this sedative effect on pain, which is manifested by a feeling of redness and pain in the skin, was further enhanced when the abovementioned active product was combined with an adequate penetration agent called here promoter of skin absorption. .

 The subject of the invention is therefore a new cosmetic composition containing, in addition to the conventional ingredients and excipients, hydroxypolyethoxydodecane as active product, advantageously combined with a skin absorption promoter.

 Among the aforementioned promoters, mention may be made especially of alkylarylammonium salts and, among these, alkyl dimethylbezylammonium saccharinates. Such substances significantly increase the penetrating power of H.D.P. instead of application and promote rapid and lasting action. Contrary to the case of local anesthetics whose fleeting effect is explained by the hydrolytic destruction of the skin absorption promoters, 1'H.D.P. does not undergo metabolism which can reduce its action in the treated dermal layers.

 In the formulation of the compositions according to the invention, it is used, of course, apart from the abovementioned active constituents, the conventional ingredients and excipients such as suspending agents, lipid excipients, preserving agents, perfume or non-allergic essence, etc. During formulations, the amount of H.P. can generally vary from 1 to 10% and that of the absorption promoter between 0.01 and 0.05 X by weight of the total composition).

 In practice, such active compositions can be present in various liquid, semi-solid or solid forms, such as in particular: viscous suspension, hydro-alcoholic lotions, dermal creams, gels, balm, aqueous foams, etc.

 Purely by way of illustration, a few nonlimiting examples of formulations which fall within the scope of the invention will be described below.

Unless otherwise indicated, the percentages of the products are given by weight.

Example 1
Dermal cream comprising - 0.5 g% of hydroxypropylmethylcellulose - 5.0 g X of hydroxypolyethoxydodecane (or HDP) - 10.0 g% of propylene glycol - 2.0 g% of cetyl alcohol - 0.025 g X of saccharinate akoyldimethylbenzylammonium - 0.6 g% of known preservative "GERMAL II" (registered trademark)
Example 2
Transparent dermal gel comprising - 5.0 g X of HDP - 0.6 g% of carboxyvinyl polymer - 2.0 g X of magnesium silicate-colloidal aluminum - 1.0 g% of oxyethylene polymer - qsq PH 4 , 5 of sodium hydroxide 1N - 5.0 g% of HDP - 0.025 g% of saccharin of Arbyldimethylbenzylammonium - 0.5 g% of known preservative "Nuosept C" (registered trademark) - qs 100 X of purified water
Example 3
Hydroalcoholic lotion comprising - 5.0 g% HDP - 0.03 g% alroyl dimethylbenzylammonium saccharinate - 4.9 g% capric acid glyceride (polyoxyethylene capric ester
glycol) - 1.5 g% glycerin - 35.0 g% purified water - 0.5 g% citric acid - 58.0 g of 960 alcohol - 0.6 g% of Germal II preservative - perfume qs for 100%
Example 4
Dermal cream comprising - 5 g% HDP - 0.025 g% akcyldimethylbenzylammonium saccharinate - 6 g% polyoxyethylene lauryl ether (laureth-23 type) - 2 g% carboxyvinyl polymer - 2 g% titanium oxide - 5 g% acetone - 0.5 g% NuoseptC preservative - qsq PH 4.5 of triethanolamine - qs 100% purified water
Example 5
Aqueous suspension comprising - 5 g% of HDP - 1 g% of propylene glycol - 2 g% of diethanolamide of coconut fatty acid - 0.025 g% of saccharinate draR yldimethylbenzylammonium - 0.8 g% of magnesium aluminum silicate - 0.9 g% sodium chloride - lg% hydroxypropyl methylcellulose - 0.5 g X of Nuoseptic preservative - qs 100% distilled water
EXAMPLE 6 Foaming Shaving Cream of Composition - 5.0 g X of HDP - 20.0 g X of stearic acid - 10.0 g% of lauric acid - 2.0 g X of sodium hydroxide - 1 , 0 g% potassium hydroxide - 10.0 g% glycerin - 1.0 g% lanolin - 2.0 g X vegetable oil - 0.5 g X imidazolidinylurea (preservative) - qsg water purified 100 g
Example 7
Shaving balm comprising - 5.0 g% HDP - 0.025 g X aloyl dimethylbenzyl ammonium saccharinate - 7.0 g% peanut oil - 0.66 g% perfume - 0.4 g% of triethanolamine l, lg% of ammonia - 16.6 g% of stearin - qs 100% of purified water Example 8::
Hydroalcoholic lotion comprising - 5.0 g% HDP - 0.6 g X of Germal II preservative - 5.0 g X of Ameroxol OE 10 (methoxylated oleic alcohol) - 2.5 g X of Glucam E 20 (glucoside niethoxyle) - 45.0 g X ethyl alcohol 950 qs 100 X purified water
example 9
We get watery against razor fire including
- 1.25 g of pistocstne (oxy-polyethoxydodecane)
- 1.00 g of stearic acid
- 0.50 g of triethanolamime
- 0.90 g of Lanol CTO wax
- 5 g of freon (40/60 mixture of freon 12 and freon 114)
- qs 100 Z or 25 g of purified water.

 Experiments were carried out on the cosmetopharmacological properties of the above formulations according to the invention by subjecting the latter to tests on users. It was found that the latter, subject to treatment, did not complain of pain and / or burns, both in the first minutes of the treatment session and later.

 The composition according to the invention was administered by application in the form of a massage on the skin to be treated, a few minutes before the operation, without the users having had to overcome the drawbacks of anesthetic treatments.

For example, double-blind clinical trials comparing the balm composition according to Example 7 to a placebo composition have shown the superiority of the composition of the invention
on the comparison treatment, in particular from the point of view of
tolerance and pain experienced during hair removal and
shaving.

Claims (5)

 1. Cosmetic composition for skin application to prevent pain and overheating during hair removal and / or shaving, characterized in that it contains as active product hydroxypolyethoxydodecane associated with a skin absorption promoter.  2. Composition according to claim 1, characterized in that the promoter consists of an alkylarylammonium salt.  3. Composition according to Claim 3, characterized in that the said salt is alkyl sidinethylbenzylammonium saccharinate.  4. Composition according to any one of claims 1 to 3, characterized in that the amount of active product used is between 1 and 10% and said promoter 0.01 to 0.05% relative to the total weight of the composition, the latter also containing the usual excipients for cosmetic formulations.  5. Composition according to any one of claims 1 to 4, characterized in that it is used in the form of gel, cream, hydroalcoholic lotion, aqueous suspension, balm or shaving foam.