DE2163541A1 - Suntanning preparations - Google Patents

Description

Patent attorney patent attorneys

Dr. phil. Gerhard Henkel Dr. rer. nat. Wolf-Dleter handle

D-757 Beden-Baden Balg Di ρ L- I ng. Ralf M. Kern

^Dr · ^r · ^nat · ^{Lothar FeMer}

D-8 Munich 90 Eduard-Sdimld-Str. 2 -η Tel .: (0811) 663197

Telegr.-Adr.i ElllpwXd MOndMn

The Gillette Company

Boston, Mass., V.St.A.

^LJ Dec 21, 1971

ΙΙμθγ Zalctmn: Dr. P. / CL Betrtttti

Sun tan 1

The invention relates to a liquid cosmetic preparation, in particular a sun-tanning agent that can be applied to the dull to promote a deep, dark tan when sunbathing or when exposed to UV light.

There are already a wide variety of cosmetic preparations known for application to sun exposed skin, however, they are all with one or more Disadvantage (s) afflicted. Some of these preparations contain a UV filter that prevents sunburn-causing radiation from passing through. However, since the same Radiation causes tanning, it also occurs at the same time as preventing sunburn a delay or a complete prevention of the desired browning. Other preparations that though enable the desired tan, but suffer from the fact that they are sunburned during the tanning process or they are unable to prevent the drying out and a certain tanning of the skin.

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According to Erxindun, a liquid preparation has now been developed in which at the same time a liquid oil phase and a liquid aqueous phase are included. If such a liquid preparation is appropriate on When the skin is applied, numerous individual water droplets form on the surface of the skin "Collective lenses", with the help of which the tanning portions of the sunlight is aimed at a zone below the surface of the skin where the melanophores are located or bundled. A cosmetic preparation according to the invention is also a conventional UV filter incorporated to reduce or completely avoid sunburn. As a result of Lens effect of the preparation in terms of focusing the incident radiation on the area of the melanophores the tendency of this radiation to develop a deep dark tan due to the UV filter present practically not impaired, on the contrary, even reinforced.

In cosmetic preparations according to the invention has the oil phase has a viscosity, measured at a temperature of yj, 3 ⁰ C, of ^ O to I90 Saybolt seconds (universal). The oil phase separates quickly from the aqueous phase after thorough shaking (the preparation). Lasting for 120 seconds standing at room temperature nacÄ ^m shaking of the preparation in this case separate at least 50% of the oil phase from the aqueous phase. Preferred formulations are those in which the oil phase has a viscosity, measured at a temperature of JY, 8 ⁰ C, of 65 has 75 Saybolt seconds (universal) and lake within 60 separates at least 50 $ of the aqueous phase. Optimal results are achieved

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with preparations in which at least ^ O ) ό of the oil phase separate from the aqueous phase within ^ O see.

a preparation

The oil phase / according to the invention can consist of all cosmetically harmless oils, such as liquid hydrocarbons; Fatty alcohols, fatty acids, fatty acid esters, fatty aldehydes or ketones and mixtures thereof. All common and widespread liquid hydrocarbons, such as mineral oils or so-called mineral splits (turpentine oil substitute) with the required properties can be used here. Flowable silicones are, for example, organic siloxanes such as methylhydrogensiloxane, dimethylsiloxane, ethylhydrogensiloxane, ethylmethylsiloxane and the like. Fatty alcohols which can be used are, for example, open-chain, aliphatic alcohols with K to 22 carbon atoms, such as n-i3utanol, n-decanol, myristyl alcohol, hexadecyl (cetyl) alcohol, oleyl alcohol, stearyl alcohol and the like. Suitable fatty acids are, for example, isostearic acid, pelargonic acid, coconut fatty acids, oleic acid, corn oleic acids, palm oil acids, soy fatty acids, fatty wool wax acids and the like having 12 to 26 carbon atoms. Suitable fatty acid esters are esters of monobasic and dibasic fatty acids with open chain, aliphatic alcohols. Esters with a total of 5 to 80 carbon atoms, such as isopropyl acetate, isopropyl myristate, diisopropyl adipate, dioctyl sebacate, ethyl palmitate and the like, are particularly suitable here. Suitable fatty aldehydes are those with up to j> 6 carbon atoms, such as undecylene aldehyde, caprylic aldehyde, n-nonyl aldehyde, capric aldehyde, lauric aldehyde, myristic aldehyde and the like. Suitable ketones are those with 6 to j) 6 carbon atoms, such as acetophenone, ionone, ethyl amyl ketone, methyl nonyl ketone, methyl heptenone and the like.

+) Π ießffihiren silicones,

\ f) n-Propylh.v'iroperini loxane, - k -

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BAD ORlGiN _ÄL

A cosmetic preparation according to the invention may, in each case based on its total weight, from about 20 to about 80 wt -.% Oil phase and also about 20 to about 80 wt -% containing aqueous phase..

The amount of sun protection filter used is, also based on the total weight of the preparation, 0.5 to 10% by weight . Conventional, water- or oil-soluble sunscreens can be used here. They can be dissolved in the oil phase as well as in the aqueous phase or in both. Suitable sun protection filters or sun protection agents are, for example, p-aminobenzoic acid, ethyl p-aminobenzoate, isobutyl pamino-benzoate, amyl p-dimethylaminobenzoate, 2-ethoxyethyl p-methoxycinnamate, homomenthyl salicylate and the like. A cosmetic preparation according to the invention preferably contains amyl p-dimethylaminobenzoate as a sun protection filter.

The pH of the aqueous phase of a preparation according to the invention is not particularly critical and can between 3 and 7 *, preferably between 4 and 5 * 5 *. If the inherent pH of the cosmetic preparation is not within this range, it can be reduced by adding ™ a suitable amount of an acid such as phosphoric acid, acetic acid or hydrochloric acid or a suitable base, such as ammonium hydroxide, monoethanolamine, Adjust diethanolamine and the like to the desired value.

In the oil phase, the aqueous phase or in both phases A cosmetic preparation according to the invention can also contain other customary additives, e.g. preservatives, such as methyl p-hydroxybenzoate, propyl p-hydroxybenzoate, Sorbic acid, benzoic acid, hexachlorophene or ethylenediamine

+) Ethyl p-dimethylaminobenzoate, _r

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tetraacetic acid, one or more perfume (s) or cosmetically safe dyes.

In order to be able to develop the desired effect / must the cosmetic preparations according to the invention exist in the form of two liquid phases, which are distinguished by the fact that they are rapidly separated from one another separate. The presence of wetting agents and / or solvents, such as ethanol, both with the oil phase as well as being miscible with the aqueous phase should be avoided or kept to a minimum, so as not to impair the desired separation properties.

The preparation is best applied in such a way that it is first applied to the skin in the form of a thin layer Coating or a thin layer spreads and that one then on the already "coated" skin after thoroughly shaking the container to mix the oil phase and the aqueous phase a sprayed on another amount of the preparation. If necessary, however, the preparation can be spread be dispensed with on the skin. Cosmetic preparations according to the invention can be packaged in containers, those with devices for spraying the preparation onto the skin, e.g. a manually operated pump, are equipped. On the other hand, cosmetic preparations according to the invention can also be used together with

a suitable amount of a conventional, liquefied, gaseous propellant in a pressure vessel an outlet nozzle and a finger operated valve. Independently of, whether the preparation is sprayed by means of a manually operated pump or by means of a liquefied one, gaseous propellant takes place, it has been shown

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that the best results are obtained with droplets of optimal dimensions, as they are formed when the Spray nozzle a diameter of 0.25 to 0.89, preferably of about 0.8 mm.

The following examples are intended to illustrate the invention in more detail.

example 1

First, there was an oil phase of the following composition

Parts by weight Mineral oil 65/75 96.6 Amy1-p-dimethyIamino- benzoate 2.9 Propyl p-hydroxybenzoate 0.1 Benzoic acid 0.4

manufactured. Here were the propyl p-hydroxybenxoate and the benzoic acid dissolved in the amyl p-dimethylaminobenzoate with gentle heating and stirring. The received The solution was then stirred into the mineral oil.

Furthermore, an aqueous phase of the following composition " setting,

Parts by weight

deionized water benzoic acid

Methyl p-hydroxybenzoate

manufactured. The aqueous phase was prepared in such a way that the water was initially heated to a temperature of about 70 ° to 75 ° C was heated and then the remaining ingredients were stirred into the water. Of the The pH of the aqueous phase was 5 * 0.

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99 6th 0, j) 0, 1

After cooling the two phases to room temperature, each of them was placed separately in a suitable container brought in. Here, the aqueous phase was first introduced in a relative amount of 59 parts by weight and then the oil phase "coated" in a relative amount of 1 part by weight on the aqueous phase. Both layers were completely clear.

The container was supplied with a finger operated pump with a dip tube and spray nozzle a diameter of 0, ^ 8 mm provided.

The cosmetic preparation was first shaken vigorously in the container to complete the two phases to mix. A small amount of the preparation was then sprayed onto the skin and there by hand elapsed. A further small amount was then applied to the "pretreated" area of the in a corresponding manner Sprayed on skin. After the second spray application, there were individual lenticular water droplets on the surface of the skin to observe. If the skin treated in this way was exposed to sunlight, it formed A deep, dark tan develops very quickly with a minimum of sunburn or skin irritation.

Example 2

First, an oil phase of the following composition was made:

Parts by weight

Mineral oil 65/75

Amyl p-dimethylaminobenzoate

Propyl p-hydroxybenzoate perfume

manufactured. Here, the propyl p-hydroxybenzoate and the perfume were initially in the amyl p-dimethylaminobenzoate at room temperature dissolved, whereupon the resulting solution

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40 2 1, 1 0, 1 O,

has been mixed with the mineral oil.

By heating 100 parts by weight of deionized water to a temperature of 65 ° C. and stirring in 0.1 part by weight Methyl p-hydroxybenzoate in the warm water was also used to prepare an aqueous phase with a pH of 5 * 7.

Both phases were allowed to cool to room temperature and then packaged in the manner described in Example 1.

^ When applying the cosmetic preparation obtained the same results as in Example 1 were obtained.

Example 3

An oil phase was produced by dissolving 1.2 parts by weight of amyl p-dimethylaminobenzoate in 100 parts by weight of mineral oil 65/75. Further, part by weight was added methyl p-hydroxybenzoate in 65 ⁰ C warm by dissolving 0.1 deionized water produced a separate aqueous phase. After cooling to room temperature, the two phases were packed in different quantities in different containers in the manner described in Example 1. The relative proportions of the individual phases in the various containers are summarized in the following table:

container Parts by weight Parts by weight oil phase aqueous phase A. 61.2 ^ 8.8 B. 51.2 48.8 C. 41.2 50.8 D. 31.2 68.8

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Were the individual cosmetic preparations from the various containers in that described in Example 1 When applied to the skin, it was found that there were clear pearls or droplets on the surface of the skin formed from the aqueous phase. It was found that with the various cosmetic preparations one from the various containers when the exposed skin areas are exposed to sunlight deep dark tan was achievable.

Example 4

A cosmetic preparation corresponding to the cosmetic preparation accommodated in container C of example j5 was accommodated together with a customary propellant in a pressure container with a valve having an immersion tube and a spray nozzle with a diameter of 0.8 mm. Corresponding satisfactory results as in Example 1 were obtained when, based on the total weight of the preparation, as the blowing agent 10 wt -.% Isobutane used. Similar results were also obtained when using 15 wt -.% Isobutane as propellant. Furthermore, corresponding results were obtained when using 10 and 15 wt -.% Of a propellant mixture of 40 wt -.% Dichlorodifluoromethane and 6o wt .- ^ Dichlortetrafluorathan.

Examples 5-12

Cosmetic preparations were produced according to the following recipes, in which the sunscreen was once dissolved in the oil or oil mixture and, on the other hand, the benzoic acid was stirred into about 'JO ⁰ G warm water and the resulting solution was cooled to room temperature and finally the oil phase and the aqueous phase in a container described in Example 1 were placed. Formed when sprayed on the skin

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when using each preparation, small water droplets appear on the surface of the skin. All preparations proven proven to be highly effective in promoting a deep, dark tan when exposed to sunlight. In the The following list shows the individual components of the various recipes in parts by weight specified.

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Examples

5 β 7 3 9 10 11 12

Mineral oil 65/75 20 20 20 55 10 68.8 13.8

20th 20th 20th 20th 20th 20th

Isopropyl myristate 20 20 5 10

Hexadecyl alcohol

spirit

MineralaÄJOBJDBi (odorless 20

Turpentine oil substitute)

Amyl p-dimethylaminobenzoate 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2

JJ benzoic acid 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3

- * Deionized water 58.5 58.5 58.5 58.5 58.5 78.5 29.7 79.7

Claims (8)

Claim e MU sun tanning agent, characterized in that, in each case based on the total weight of the composition, about 20 to 80 percent of a cosmetically acceptable liquid preparation of -.% Oil phase, about 20 to 80 wt .- # water and 0.5 to 10 weight -% sun protection filter, the oil phase has a viscosity, measured at a temperature of j57> 8 ° C, from ^ 0 to 190 Saybolt seconds (universal), the aqueous phase has a pH value of ~ 5 to 7 and the oil phase after the shaking at 120 see lasting standing at room temperature to at least 50 wt -.% separated from the aqueous phase. 2. Sun tanning agent according to claim 1, characterized in that the oil phase consists of a liquid hydrocarbon, flowable silicone, fatty alcohol, a fatty acid, a fatty acid ester, a fatty aldehyde, a Ketone or a mixture thereof. j>. Sun tanning agent according to claim 2, characterized in that that the oil phase consists of a mineral oil. 4. Sun tanning agent according to one or more of claims 1 to J5, characterized in that it is as Sun protection filter contains amyl p-dimethylaminobenzoate and its aqueous phase has a pH of 4 to 5 * 5. 5. Sun tanning agent according to one or more of the preceding claims, characterized in that its oil phase consists of a mineral oil and has a viscosity, measured at a temperature of 37 * 8 C, of 65 to 75 Saybolt seconds (universal) and that it, based on its total weight, to about 40 to 60 wt -% water is -.% of mineral oil and about 40 to 60 wt.. - ■ 13 209831/1058 6. Sun tanning agent according to one or more of the preceding claims, characterized in that its oil phase on standing for 30 seconds at room temperature at least 50 wt .- ^ separates from the aqueous phase. 7. Sun tanning agent according to one or more of the preceding claims, characterized in that it is housed for application in a spray can with a spray nozzle with a diameter of 0.25 to 0.89 mm. 8. Sun tanning agent according to claim 1, characterized in that it is housed in the spray can together with a liquefied, gaseous propellant. +) after shaking the preparation 209831/1058