Flash point increase through addition of licorice extract

Abstract

Methods and uses for increasing the flash point of a cosmetic preparation, wherein licorice extract from the plant Glycyrrhiza inflata is added to the preparation.

Description

[0001] Beiersdorf Aktiengesellschaft Hamburg

[0002] Description

[0003] Cosmetic preparation with an elevated flash point

[0004] The present invention relates to methods and uses for increasing the flash point of a cosmetic preparation, wherein licorice extract from the plant Glycyrrhiza inflata is added to the preparation.

[0005] The desire to look beautiful and attractive is rooted in human nature. Even though the ideal of beauty has changed over time, the pursuit of a flawless appearance has always been a human goal. The condition and appearance of the skin plays a significant role in achieving a beautiful and attractive appearance.

[0006] For the skin to fully perform its biological functions, it requires regular cleansing and care. Skin care products, usually creams, serums, fluids, ointments, or lotions, primarily serve to moisturize and replenish the skin's natural oils. They often contain active ingredients intended to regenerate the skin and, for example, prevent and reduce premature aging (such as the formation of fine lines and wrinkles).

[0007] However, the large number of commercially available cosmetic preparations should not obscure the fact that these state-of-the-art preparations have a number of disadvantages.

[0008] Cosmetic preparations often contain highly flammable components, especially ethanol. The concentration of such ingredients lowers the flash point of the overall composition and thus increases the fire hazard of such preparations, so that elaborate and costly safety measures must be observed, particularly when storing larger quantities and during transport.

[0009] The object of the present invention was therefore to find means and methods by which the flash point of cosmetic preparations can be increased. Furthermore, it was an object to develop cosmetic preparations with an increased flash point. Ethanol-containing preparations are particularly preferred. These objects are surprisingly solved by a method for increasing the flash point of a cosmetic preparation, characterized in that licorice extract from the plant Glycyrrhiza inflata is added to the preparation.

[0010] Surprisingly, the problems are also solved by using licorice extract from the plant Glycyrrhiza inflata in cosmetic preparations to increase the flash point of the preparation.

[0011] Within the scope of the present disclosure, formulations such as "according to the invention", "advantageous in the sense of the present invention", etc. always refer to the inventive method and the inventive use, unless otherwise stated.

[0012] According to the invention, it is advantageous if the licorice extract from the plant Glycyrrhiza inflata contains the compound licochalcone A. It is therefore particularly preferred that it be obtained from the roots of this plant (Glycyrrhiza inflata root extract).

[0013] Preferred embodiments of the present invention are characterized in that the extract is in the form of a powdered solid under normal conditions of 20 °C and 1.013 bar.

[0014] According to the invention, this extract is preferably obtained as follows: First, a water extract is obtained from the finely chopped root. This aqueous solution is acidified with hydrochloric acid and extracted with ethyl acetate. Subsequently, this ethyl acetate extract is treated with ethanol, whereby the solid extract precipitates.

[0015] According to the invention, it is therefore preferably an extract from the aqueous extract of the root of Glycyrrhiza inflata, which is obtained by extraction with ethyl acetate.

[0016] The compound licochalcone A has the following structure: Licochalcone A

[0017] It is advantageous in the sense of the present invention if the cosmetic preparation contains the licorice extract from the plant Glycyrrhiza inflata in an amount of 0.01 to 1% by weight, based on the total weight of the preparation.

[0018] The fact that even these small quantities had such a large influence on the flash point of the preparations was particularly surprising and unforeseeable for the expert.

[0019] Advantageous embodiments of the present invention are characterized in that the cosmetic preparation contains ethanol.

[0020] In such a case, according to the invention, it is preferred if the cosmetic preparation contains ethanol in a concentration of 2 to 80 wt%, preferably 2 to 10 wt%, based on the total weight of the preparation.

[0021] Advantageous embodiments of the present invention are characterized in particular by the fact that the flash point of the cosmetic preparation is increased to > 100 °C by the method and the use.

[0022] The inventive method and use are particularly relevant when the preparation contains other flammable components.

[0023] Thus, advantageous embodiments of the present invention are characterized in that the cosmetic preparation contains dibutyl adipate and / or isopropyl palmitate.

[0024] If the preparation contains dibutyl adipate, it is advantageous according to the invention if the cosmetic preparation contains dibutyl adipate in a concentration of 1 to 5% by weight, based on the total weight of the preparation.

[0025] If the preparation contains the cosmetic preparation isopropyl palmitate, it is advantageous according to the invention if this compound is present in a concentration of 2 to 6% by weight, based on the total weight of the preparation. Advantageous embodiments of the present invention are further characterized in that the preparation contains one or more polymers selected from the group consisting of xanthan gum (INCI: Xanthan Gum), distarch phosphate (INCI: Distarch Phosphate), and carrageenan.

[0026] If the preparation contains xanthan gum (INCI: Xanthan Gum), it is advantageous according to the invention if the cosmetic preparation contains xanthan gum (INCI: Xanthan Gum) in a concentration of 0.2 to 1% by weight, based on the total weight of the preparation.

[0027] If the preparation contains distarch phosphate (INCI: Distarch Phosphate), it is advantageous according to the invention if the cosmetic preparation contains distarch phosphate (INCI: Distarch Phosphate) in a concentration of 1.5 to 5% by weight, based on the total weight of the preparation.

[0028] It is advantageous in the sense of the present invention if the cosmetic preparation is in the form of an oil-in-water emulsion (O / W emulsion).

[0029] In such a case, it is advantageous according to the invention if the preparation contains one or more O / W emulsifiers selected from the group of compounds glyceryl stearate citrate, glyceryl stearate, glyceryl stearate (self-emulsifying), stearic acid, stearate salts, polyglyceryl-3 methylglycosederate, sodium cetearyl sulfate, potassium cetyl phosphate, polyglyceryl-6 stearate, polyglyceryl-6 behenate, polyglyceryl-10 stearate, sodium stearoyl glutamate, polyglyceryl-3 polyricinoleate (INCI: polyglyceryl-3 polyricinoleate), polyglyceryl-3 diisostearate, polyglyceryl-3 distearate, and polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate.

[0030] According to the invention, sodium stearoyl glutamate, glyceryl stearate citrate, glyceryl stearate (self-emulsifying), sodium cetearyl sulfate, polyglyceryl-3 distearate, polyglyceryl-6 stearate, polyglyceryl-6 behenate and polyglyceryl-3 methylglycosederate are preferably used.

[0031] Advantageous embodiments of the present invention are characterized, not least, by the fact that the preparation is free from polyacrylates (INCI: Carbomere), 2-ethylhexyl 2-hydroxybenzoate (INCI: Ethylhexyl Salicylate) and 3,3,5-trimethylcyclohexyl 2-hydroxybenzoate (INCI: Homosalate), 3-(4-methylbenzylidene)-camphor, 2-hydroxy-4-methoxybenzophenone (INCI: Oxybenzone), ethylhexyl 2-cyano-3,3-diphenyl acrylate (INCI: Octocrylene), 2-ethylhexyl 3-(4-methoxyphenyl)prop-2-enoate (INCI: Ethylhexyl Methoxycinnamate), polyethylene glycol, polyethylene glycol ethers and polyethylene glycol esters (so-called PEG derivatives), parabens, methylisothiazolinone, chloromethylisothiazolinone and DMDM ​​hydantoin.

[0032] Comparative tests / measurement methods

[0033] The flash points were measured using the flashpoint tester ABA 4 from alfatec.

[0034] The following recipes were prepared and their flash points determined:

[0035] Examples

[0036] The following examples are intended to illustrate the present invention without limiting it. Unless otherwise stated, all quantities, proportions, and percentages are based on the weight and total quantity or total weight of the preparations.

Claims

Patent claims 1. Method for increasing the flash point of a cosmetic preparation, characterized in that licorice extract from the plant Glycyrrhiza inflata is added to the preparation.

2. Use of licorice extract from the plant Glycyrrhiza inflata in cosmetic preparations containing licorice extract to increase the flash point of the preparation.

3. Method according to claim 1 or use according to claim 2, characterized in that licorice extract from the plant Glycyrrhiza inflata contains the compound licochalcone A.

4. Methods or uses according to any of the preceding claims, characterized in that the extract is obtained from the aqueous extract of the root of Glycyrrhiza inflata by extraction with ethyl acetate.

5. Methods or uses according to any of the preceding claims, characterized in that the cosmetic preparation contains the licorice extract from the plant Glycyrrhiza inflata in an amount of 0.01 to 1% by weight, based on the total weight of the preparation.

6. Methods or uses according to any of the preceding claims, characterized in that the cosmetic preparation contains ethanol.

7. Methods or uses according to any of the preceding claims, characterized in that the cosmetic preparation contains ethanol in a concentration of 2 to 80% by weight, based on the total weight of the preparation.

8. Methods or uses according to any of the preceding claims, characterized in that the flash point of the cosmetic preparation is increased to > 100 °C.

9. Methods or uses according to any of the preceding claims, characterized in that the cosmetic preparation contains dibutyl adipate and / or isopropyl palmitate.

10. Methods or uses according to any of the preceding claims, characterized in that the cosmetic preparation contains dibutyl adipate in a concentration of 1 to 5% by weight, based on the total weight of the preparation.

11. Methods or uses according to any of the preceding claims, characterized in that the cosmetic preparation contains isopropyl palmitate in a concentration of 2 to 6% by weight, based on the total weight of the preparation.

12. Method or use according to any of the preceding claims, characterized in that the preparation contains one or more polymers selected from the group consisting of the compounds xanthan gum (INCI: Xanthan Gum), distarch phosphate (INCI: Distarch Phosphate) and carrageenan.

13. Methods or uses according to any of the preceding claims, characterized in that the cosmetic preparation contains xanthan gum (INCI: Xanthan Gum) in a concentration of 0.2 to 1% by weight, based on the total weight of the preparation.

14. Methods or uses according to any of the preceding claims, characterized in that the cosmetic preparation contains distarch phosphate (INCI: Distarch Phosphate) in a concentration of 1.5 to 5% by weight, based on the total weight of the preparation.

15. Methods or uses according to any of the preceding claims, characterized in that the cosmetic preparation is in the form of an oil-in-water emulsion (O / W emulsion).

16. A method or use according to any of the preceding claims, characterized in that the preparation is free of polyacrylates (INCI: Carbomere), 2-ethylhexyl 2-hydroxybenzoate (INCI: Ethylhexyl Salicylate) and 3,3,5-trimethylcyclohexyl 2-hydroxybenzoate (INCI: Homosalate), 3-(4-methylbenzylidene)-camphor, 2-hydroxy-4-methoxybenzophenone (INCI: Oxybenzone), ethylhexyl 2-cyano-3,3-diphenyl acrylate (INCI: Octocrylene), 2-ethylhexyl 3-(4-methoxyphenyl)prop-2-enoate (INCI: Ethylhexyl Methoxycinnamate), polyethylene glycol, polyethylene glycol ethers and polyethylene glycol esters (so-called PEG derivatives), parabens, methylisothiazolinone, chloromethylisothiazolinone and DMDM ​​hydantoin.

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