FI77778C - Cosmetic agent containing a double emulsion and process for their preparation. - Google Patents

Description

1 77778

Cosmetic substance containing a double emulsion and its production method

The invention relates to a cosmetic substance in the form of an ointment, paste, cream or the like, which contains hydrophilic and / or lipophilic active ingredients, a fat phase, an aqueous phase, emulsifiers, preservatives and perfumes.

Numerous cosmetic creams of this kind, 10 ointments or the like, in particular the so-called skin nourishing and moisturizing creams are known which are based on either an oil / water emulsion or a water / oil emulsion. The problem with such creams is undoubtedly that different areas of the skin or different skin types with different fat and / or moisture needs cannot be treated according to their special needs when applying such a cream. In relation to the skin's need for fat and / or moisture, such an ointment is usually applied to individual areas of the skin, usually either too much or too little fat phase, nutrients, moisture, etc. Sequential application of ointments based on one and the other emulsion type does not help.

It is an object of the invention to provide cosmetic ointments, lotions or the like which allow different areas of the skin to be cared for simultaneously in response to their specific need for fat, nutrition and / or moisture.

The cosmetic agent according to the invention is characterized in that the hydrophilic and / or lipophilic active ingredients, the fat phase and the aqueous phase are an oil / water emulsifier and an oil / water emulsion containing a preservative and a water / oil emulsifier containing an oil / oil emulsifier. in the form of a finely divided mixture, wherein the emulsions have a particle size of 2 to 50, and wherein the double emulsion is prepared by forming from a fat phase, an aqueous phase, an oil / water emulsifier and preservatives into an oil / water emulsion and forming a fat phase, 2 77778 from the aqueous phase and a water / oil emulsifier from a water / oil emulsion and thoroughly mixing the emulsions under vacuum at a temperature between 20 and 40 ° C while adding hydrophilic and / or lipophilic active ingredients.

5 With the help of skin creams containing a very fine mixture of these two types of emulsions, the skin can be given a corresponding oil / water or water / oil hydrolipid film according to its moisture for different areas or depending on the skin type.

According to the invention, the particle size of the emulsion is 2-50.

The invention further relates to a process for the preparation of a cosmetic substance in the form of an ointment, paste, lotion or the like, which process is characterized in that the fat phase, the aqueous phase, the oil / water emulsifier and the preservatives are made into an oil / water emulsion and the fat phase, the aqueous phase and the aqueous phase. A water / oil emulsion is prepared from the oil emulsifier and that each emulsion is thoroughly mixed with hydrophilic and / or lipophilic active ingredients 20 under vacuum at a temperature between 20 and 40 ° C and then the resulting fine mixture is mixed with fragrances.

Given the different needs of the skin, it might seem that the same effect would be obtained simply by mixing the two types of emulsions together to make a cream, but this procedure is certainly not possible. This is due to the fact that these two types of emulsions have so far not been able to be maintained permanently as a mixture, but rather, depending on the ingredients used, very soon after preparation the second type of emulsion changes to another, leaving only one type of emulsion.

When these two types of emulsions are combined in a mixing tank at a temperature between 20 and 40 ° C, preferably at 30 ° C, very gently but thoroughly under vacuum, so that a very fine dispersion of each emulsion with a particle size of 2 is obtained. -50, preferably 5-15, then each type of emulsion is left unchanged in the ointment prepared as a mixture. This emulsion system remains stable at considerable dilution, e.g. with the liquid phase. It is assumed that the stability of this emulsion system is affected by the particle size as well as the interaction of the emulsifiers. It is essential that the emulsion used in the preparation of the cosmetic agent according to the invention be dispersed and not homo-10.

The combination of the two emulsions preferably takes place under vacuum at a pressure of 0.5 to 50 torr (about 65 to 6500 Pa). The mixing speed is, as is well known to the person skilled in the art, dependent on the mixing device used and is determined in a manner known per se.

Oil / water emulsions and water / oil emulsions can be prepared in a conventional manner using conventional emulsifiers. Kirk-Othmer: Enzyclopedia of Chemical Technology, 3rd Edition (1979), John Wiely & Sons, New York 20 et al., Vol. 8, p. . 900 - 930; and Dr. Otto-Albrecht Neumiil-ler: Römpps Chemie Lexikon, 7th edition (1973), Franck'sche Verlagshandlung Stuttgart, p. 1009 - 1013 ^. The waxes, emulsifiers and other additives used for these emulsions are the same as those traditionally used in emulsified skin care products (Ώτ. Otto-Albrecht Neumviller: Römpps

Chemie Lexikon, 7th edition (1973), Franck'sche Verlagshandlung Stuttgart, ss. 1427 - 14287.

One oil / water emulsion used in the cosmetic agent according to the invention consists of hydrophilic and / or lipophilic active ingredients, a fat phase, an oil / water emulsifier, an aqueous phase and preservatives.

As hydrophilic and / or lipophilic active ingredients, humectants (hydro-35 complexes) can be used, such as, for example, glycerin, polyethylene glycol or amino acid mixtures, Puroba oil (= Jojoba oil), 4 77778 vitamins (preferably vitamins A and E). ), vital complexes (such as placental extracts), enzymes, herbal extracts (such as Hammamelis extract or chamomile extract) or proteins (such as collagen). hydrocarbons, such as petrolatum, paraffin or stearin, or waxes, such as beeswax, are suitable as the oily phase or the fatty phase in the oil / water emulsion. Suitable oil / water emulsifiers are, for example, stearyl alcohol, polyoxyethylene stearates (such as MYR), comp- (R'10 lexical emulsifiers (such as Amphoterin), and sorbitan fatty acid esters (such as Span®) or carboxy. vinyl polymers (such as Carbopol®) The aqueous phase may further contain buffers such as ethylenediamine-Ν, Ν, Ν ', the disodium salt of N1-tetraacetic acid, and preservatives such as chloroquinaldol, para-perbene or benzalkonium chloride.

the oil / water emulsion preferably contains 30 to 49% by weight of the inner emulsion. The particle size of the inner emulsion is preferably 1 to 100; in the dispersion of each phase 20 it is further reduced and is less than 50 μm in the finished product.

One water / oil emulsion useful in the cosmetic agent of the invention, in turn, consists of hydrophilic and / or lipophilic active ingredients, such as those also used in oil / water emulsions, a fat phase, a water / oil emulsifier and an aqueous phase. As the oily phase or fatty phase of the water / oil emulsion, hydrocarbons, e.g. paraffins and petrolatums, synthetic or vegetable or animal oils or waxes (for example olive oil, peanut oil, fine bone oil, almond oil or almond oil, lanolin) can be used. purified mineralized water as the aqueous phase, and wool fat (= lanolin) as a water / oil emulsifier, fatty alcohols such as cetyl alcohol, myristyl alcohol, stearyl alcohol or cetyl alcohol, fatty acid esters such as beeswax Alba) or wax alcohol esters or mixed barrier (r) thiols (such as Dehymuls®).

5 77778

The water / oil emulsion preferably contains 30 to 49% by weight of the inner emulsion. The particle size of the inner emulsion is preferably 1 to 100 μm; in the dispersion of both phases, it is further reduced and is less than 5 5 0 μm in the final product.

the mixing ratio of the oil / water emulsion and the water / oil emulsion is preferably 20 to 80% by weight.

The finely divided system is additionally mixed with (R) fragrances, such as the Crematest series of fragrances.

For example, the cosmetic agent according to the invention may have the following composition in the form of a nourishing skin cream (numerical values are given in% by weight): Tolerances

Puroba oil 5% 5 - 10%

Cera Alba (beeswax) 1% 1 - 5%

Dehymuls® 1% 1 - 3%

Stearyl alcohol 4% 4 - 8% 20 Hydrocarbons 30% 30 - 50%

Carbopol ^ 1% 2 - 5% MYRJ® 3% 2 - 5%

Disodium edetate 1%

Chloroquinaldol 1% 25 Purified demineralized water 52% 30 - 55%

Perfume oil 1%

The following embodiment illustrates the method according to the invention 30.

Example A) Preparation of an oil / water emulsion 10.0 g of disodium edetate and 10.0 g of chloroquinaldol were dissolved in 330.0 g of purified demineralized water and 10.0 g of Carbopol® were added.

This mixture was introduced with vigorous stirring into a melt containing 80.0 g of Vaseline (DAB 8) (DAB 8 is an abbreviation for the German pharmaceutical work Deutsche Arzneibuch, 6 77778 Official Publication !, 8th edition 1978), 40.0 g of stearyl alcohol, 30, 0 g MYRJ ^ and 50.0 g Puroba oil. The mixture was further stirred until an emulsion with a particle size of 20-70 was formed.

5 B) Preparation of a water / oil emulsion 228.0 g of purified demineralized water were introduced under vigorous stirring into a melt of 220.0 g of petrolatum (DAB 8), 10.0 g of Dehymuls® and 10.0 g of Cera Alba. The mixture was further stirred until an emulsion with a particle size of 20-70 was formed.

The water / oil emulsion was introduced into the oil / water emulsion under vigorous stirring under a vacuum of 10 torr (about 1.3 kPa). Stirring was continued until a dispersion with a particle size of 10-50 was formed, the vacuum was removed and a further 2.0 g of Crematest® fragrance was added with stirring.

Claims (2)

7 77778 Cosmetic substance in the form of an ointment, paste, lotion or the like, containing hydrophilic and / or lipophilic active ingredients, fat phase, aqueous phase, emulsifiers, preservatives and fragrances, characterized in that it contains hydrophilic and / or lipophilic active ingredients , the fat phase and the aqueous phase are in the form of a finely divided mixture of an oil / water emulsifier 10 and a preservative-containing oil / water emulsion and a water / oil emulsifier-containing water / oil emulsion, the emulsions having a particle size of 2 to 50. is prepared by forming an oil / water emulsion from the fat phase, the aqueous phase, the oil / water emulsifier and the preservatives and forming the water / oil emulsion from the fat phase, the aqueous phase and the water / oil emulsifier and mixing the emulsions thoroughly with each other under vacuum at 40 ° C C while adding hydrophilic and / or lipophilic active ingredients. Process for preparing a cosmetic substance according to claim 1, characterized in that an oil / water emulsion is prepared from the fat phase, the aqueous phase, the oil / water emulsifier and the preservatives and the water / oil emulsion and the water / oil emulsifier are prepared from the fat phase, the aqueous phase and the water / oil emulsifier. the emulsions are thoroughly mixed together under vacuum at a temperature between 20 and 40 ° C while adding hydrophilic and / or lipophilic active ingredients and the resulting finely divided mixture is then added with fragrances.