Cosmetic emulsions containing dextrin phosphate and gum

Abstract

Cosmetic emulsions containing distarch phosphate (INCI: Distarch Phosphate) and one or more gums, and the use of one or more gums in cosmetic emulsions containing distarch phosphate (INCI: Distarch Phosphate) for reducing water analysis out of the formulation.

Description

[0001] This invention relates to a cosmetic emulsion containing distarch phosphate (INCI) and one or more gums, and the use of one or more gums in a cosmetic emulsion containing distarch phosphate (INCI) to reduce water separation in the formulation.

[0002] The desire for beauty is universal. Although beauty standards change with the times, the pursuit of a flawless appearance remains a constant goal. And the condition and appearance of the skin are key to creating beauty and charm.

[0003] To enable the skin to fully perform its biological functions, it needs regular cleansing and care. Skincare products, typically creams, ointments, or lotions, are primarily used to moisturize and replenish the skin's natural oils. They often contain active ingredients that promote skin regeneration, aiming to repair the skin and delay or reduce premature signs of aging (such as the appearance of fine lines and wrinkles).

[0004] Skin care products are typically composed of emulsions. An emulsion is generally considered a heterogeneous system consisting of two liquids, commonly referred to as phases, that are immiscible or only limitedly miscible with each other, with one liquid dispersed in the other as very small droplets. Visually, an emulsion appears homogeneous. To stabilize the emulsion over a longer period and prevent phase separation, so-called emulsifiers are added. Emulsifier molecules typically have a polar hydrophilic structure and a nonpolar lipophilic structure. In addition to the oil-water phase separation phenomenon typically regulated by emulsifiers, those skilled in the art are aware of two other phenomena present in cosmetic emulsions: oil phase separation and water separation. These two phenomena differ from phase separation in that only a portion of the oil or water phase separates from the emulsion, while the remainder remains stable. Since phase separation and water / oil separation are two distinct phenomena, they can occur independently (e.g., simultaneously).

[0005] The mechanism of water or oil separation is not yet fully understood. What is clear is that the choice or amount of emulsifier alone cannot affect the occurrence of this phenomenon.

[0006] Furthermore, those skilled in the art will know that this "water separation" phenomenon frequently occurs in emulsions thickened with distarch phosphate (INCI). However, distarch phosphate is a thickener that is increasingly gaining popularity as a natural alternative to polyacrylates.

[0007] For emulsions containing the active ingredient acetyl hydroxyproline (INCI: Acetyl Hydroxyproline), water separation presents a particular challenge. In existing emulsions, this active ingredient typically promotes water separation.

[0008] Therefore, the object of this invention is to develop an emulsion capable of effectively suppressing water efflorescence. Preferably, the emulsion is thickened with distarch phosphate (INCI).

[0009] In particular, the purpose of this invention is to develop a cosmetic emulsion containing acetylhydroxyproline (INCI: AcetylHydroxyproline), wherein water precipitation can be effectively inhibited.

[0010] Surprisingly, the problem was solved through a method containing a) Distarch Phosphate (INCI) and b) One or more gelatinous substances The problem of cosmetic lotions has been solved.

[0011] Furthermore, surprisingly, the problem was also solved by using one or more gelling agents in cosmetic emulsions containing distarch phosphate (INCI) to reduce water separation from the formulation (emulsion).

[0012] Within the scope of this disclosure, expressions such as "advantageous to the invention" and "preferred to the invention" refer to both the formulations and uses of the invention.

[0013] According to the present invention, preferably, the gum used is selected from one or more compounds in the group consisting of xanthan gum (INCI: Xanthan Gum), dehydroxanthan gum (INCI: Dehydroxanthan Gum), gellan gum (INCI: Gellan Gum), and sclerotium gum (INCI: Sclerotium Gum). Preferably, the present invention uses dehydroxanthan gum (INCI: Dehydroxanthan Gum), gellan gum (INCI: Gellan Gum), and sclerotium gum (INCI: Sclerotium Gum) as the gum.

[0014] According to the present invention, preferably, the content of distarch phosphate (INCI: Distarch Phosphate) in the emulsion is 0.3% to 3% (weight percentage) of the total weight of the formulation. A content range of 0.5% to 2% (weight percentage) of the total weight of the formulation is preferred according to the present invention.

[0015] Furthermore, according to the present invention, it is preferred that the emulsion contains one or more gels, the total content of which is 0.05% to 1% (weight percentage) of the total weight of the formulation. A content range of 0.1% to 0.9% (weight percentage) of the total weight of the formulation is preferred according to the present invention.

[0016] A preferred embodiment of the present invention is characterized in that the weight ratio of distarch phosphate (INCI) to the total amount of gum is 0.8 to 2.7. A weight ratio of 0.9 to 2.6 is preferred. A particularly preferred weight ratio is 2.5:1.

[0017] A preferred embodiment of the present invention is characterized in that the formulation contains acetylhydroxyproline (INCI: AcetylHydroxyproline). Preferably, the acetylhydroxyproline contained in the formulation is N-acetyl-trans-4-hydroxy-L-proline.

[0018] According to the present invention, preferably, the content of acetylhydroxyproline (INCI: AcetylHydroxyproline) in the formulation is 0.01% to 0.7% (weight percentage) of the total weight of the formulation. A content range of 0.02% to 0.6% (weight percentage) of the total weight of the formulation is preferred according to the present invention.

[0019] Preferably, the formulation is an oil-in-water emulsion (O / W emulsion).

[0020] A preferred embodiment of the present invention is further characterized in that the formulation contains glyceryl stearate citrate (INCI: Glyceryl Stearate Citrate) as an emulsifier.

[0021] In this case, the present invention preferably contains 0.5% to 5% (by weight) of glyceryl stearate citrate (INCI) in the formulation.

[0022] A preferred embodiment of the present invention is further characterized in that the proportion of the oil phase in the emulsion is 3% to 35% (by weight) of the total weight of the composition.

[0023] Furthermore, it is preferred in this invention that the water content in the formulation is at least 65% (by weight) of the total weight of the formulation.

[0024] Because in emulsions with less oil phase and higher water content, water separation is particularly frequent and severe.

[0025] Finally, preferably, the formulation of the present invention is free from polyacrylate (INCI: Carbomer), 2-ethylhexyl salicylate (INCI: Ethylhexyl Salicylate), 3,3,5-trimethylcyclohexyl-2-hydroxybenzoate (INCI: Homosalate), 3-(4-methylbenzyl)camphor, 2-hydroxy-4-methoxybenzophenone (INCI: Oxybenzon), ethylhexyl-2-cyano-3,3-diphenylacrylate (INCI: Octocrylene), and 2-ethylhexyl-3-(4-methoxyphenyl)prop-2-enoate (INCI: Ethylhexyl Methoxycinnamate, ethylhexyl methoxycinnamate, polyethylene glycol, polyethylene glycol ethers and polyethylene glycol esters (so-called PEG derivatives), parabens (parabens), methylisothiazolinone, chloromethylisothiazolinone and DMDM ​​hydantoin.

[0026] Furthermore, the cosmetic lotion of the present invention may contain ingredients commonly used in cosmetics.

[0027] Comparative tests and examples The following formulation was prepared, filled into glass bottles, and stored at 25°C. Water was visually observed to separate at different time points. All weight data refer to % by weight, based on the total weight of the formulation.

[0028]

Claims

1. A cosmetic lotion, comprising: a) Distarch Phosphate (INCI) and b) One or more gelatinous substances.

2. The use of one or more gums in cosmetic emulsions containing distarch phosphate (INCI) to reduce water separation in the formulation.

3. The cosmetic emulsion according to claim 1 or the use according to claim 2, characterized in that, The gum used is selected from one or more of the following group of compounds: xanthan gum (INCI: Xanthan Gum), dehydroxanthan gum (INCI: Dehydroxanthan Gum), gellan gum (INCI: Gellan Gum), and sclerotium gum (INCI: Sclerotium Gum).

4. The cosmetic emulsion or use according to any one of the preceding claims, characterized in that, The emulsion contains acetyl hydroxyproline (INCI: Acetyl Hydroxyproline).

5. The cosmetic emulsion or use according to any one of the preceding claims, characterized in that, The content of distarch phosphate (INCI) in the emulsion is 0.3% to 3% of the total weight of the emulsion.

6. The cosmetic lotion or use according to any one of the preceding claims, characterized in that, The total content of one or more colloids in the emulsion is from 0.05% to 1% of the total weight of the emulsion.

7. The cosmetic emulsion or use according to any one of the preceding claims, characterized in that, The weight ratio of distarch phosphate (INCI) to the total amount of gum is 0.8 to 2.

7.

8. The cosmetic lotion or use according to any one of the preceding claims, characterized in that, The emulsion contains N-acetyl-trans-4-hydroxy-L-proline.

9. The cosmetic lotion or use according to any one of the preceding claims, characterized in that, The content of acetyl hydroxyproline (INCI: Acetyl Hydroxyproline) in the emulsion is 0.01% to 0.7% of the total weight of the emulsion.

10. The cosmetic emulsion or use according to any one of the preceding claims, characterized in that, The emulsion is an oil-in-water emulsion (O / W emulsion).

11. The cosmetic emulsion or use according to any one of the preceding claims, characterized in that, The emulsion contains glyceryl stearate citrate (INCI: Glyceryl Stearate Citrate) as an emulsifier.

12. The cosmetic emulsion or use according to any one of the preceding claims, characterized in that, The emulsion contains 0.5% to 5% of the total weight of the emulsion, which is glyceryl stearate citrate (INCI).

13. The cosmetic emulsion or use according to any one of the preceding claims, characterized in that, The proportion of the oil phase in the emulsion is 3% to 35% of the total weight of the composition.

14. The cosmetic emulsion or use according to any one of the preceding claims, characterized in that, The water content in the formulation is at least 65% of the total weight of the emulsion.

15. The cosmetic emulsion or use according to any one of the preceding claims, characterized in that, The emulsion is free of polyacrylate (INCI: Carbomer), 2-ethylhexyl salicylate (INCI: Ethylhexyl Salicylate), 3,3,5-trimethylcyclohexyl-2-hydroxybenzoate (INCI: Homosalate), 3-(4-methylbenzylene)camphor, 2-hydroxy-4-methoxybenzophenone (INCI: Oxybenzon), ethylhexyl-2-cyano-3,3-diphenylacrylate (INCI: Octocrylene), and 2-ethylhexyl-3-(4-methoxyphenyl)prop-2-enoate (INCI: Ethylhexylene). Methoxycinnamate, ethylhexyl methoxycinnamate, polyethylene glycol, polyethylene glycol ethers and polyethylene glycol esters (so-called PEG derivatives), parabens (parabens), methylisothiazolinone, chloromethylisothiazolinone and DMDM ​​hydantoin.

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