WO2023126638A1

WO2023126638A1 - Cosmetic composition

Info

Publication number: WO2023126638A1
Application number: PCT/IB2021/000924
Authority: WO
Inventors: Yuri Okutani; Mai OZAWA
Original assignee: L V M H Recherche
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2023-07-06

Abstract

A cosmetic composition in the form of a bi-continuous microemulsion, comprising: polyglycerol fatty acid esters, the polyglycerol fatty acid esters containing a multi chain polyglycerol fatty acid ester having two or more fatty acid residues, and the polyglycerol fatty acid esters having a total HLB value of greater than 12.0, an oil, a polyhydric alcohol, and water.

Description

COSMETIC COMPOSITION

Technical Field

[0001] The present invention relates to an oil cleansing cosmetic composition.

Background Art

[0002] Bi-continuous microemulsions are composed of an aqueous phase containing polyhydric alcohols and water, an oil phase containing oils, and a surfactant phase containing surfactants, and they are known to show high cleanability and rinsability. In regard to bi- continuous microemulsions, Japanese Unexamined Patent Publication No. 2010-280643, for example, describes a skin cleanser composition containing a bi-continuous microemulsion that is stable in a wide temperature range and has low eye irritation even with a low concentration of surfactant, by using a combination of a specific surfactant and a specific water-soluble starting material or oil-soluble starting material.

Technical Problem

[0003] Cosmetic compositions in the form of a bi-continuous microemulsions are still in need of further improvement from the standpoint of stability at the wide range of temperature.

[0004] It is an object of the present invention to provide a stable cosmetic composition in the form of a bi-continuous microemulsion.

Summary of the invention and Solution to Problem

[0005] So, the invention provides a cosmetic composition in the form of a bi-continuous microemulsion, comprising polyglycerol fatty acid esters, the polyglycerol fatty acid esters comprising a multi chain polyglycerol fatty acid ester having two or more fatty acid residues, and the polyglycerol fatty acid esters having a total HLB value of greater than 12.0, oils, a polyhydric alcohol, and water.

[0006] The present invention with this composition is a cosmetic composition keeping stable at the wide range of temperature while being in the form of a bi-continuous microemulsion.

[0007] In a particular embodiment, the polyglycerol fatty acid esters further comprise a single chain-type polyglycerol fatty acid ester having one fatty acid residue.

[0008] In a particular embodiment, the fatty acid residue in the polyglycerol fatty acid ester comprises the fatty acid residue having 8 to 18 carbon atoms.

[0009] In a particular embodiment, the multichain polyglycerol fatty acid ester has 2 to 6 fatty acid residues. [0010] In a particular embodiment, the multichain polyglycerol fatty acid ester is selected from the group consisting of polyglyceryl-10 pentaoleate, polyglyceryl- 10 trioleate, polyglyceryl- 10 dioleate, and mixtures thereof.

[0011] In a particular embodiment, the polyglycerol fatty acid esters comprise a naturally derived polyglycerol fatty acid ester.

[0012] In a particular embodiment, the content of the multichain polyglycerol fatty acid ester ranges from 0.3 part by mass to 5 parts by mass with respect to 100 parts by mass as the total mass of the polyglycerol fatty acid ester.

[0013] In a particular embodiment, the content of the multichain polyglycerol fatty acid ester ranges from 0.5 to 1 mass% based on the total mass of the cosmetic composition.

In a particular embodiment, the total content of the polyglycerol fatty acid esters ranges from 10 to 20 mass% based on the total mass of the cosmetic composition.

[0014] In a particular embodiment, the oil content ranges from 10 to 18 mass% based on the total mass of the cosmetic composition.

[0015] In a particular embodiment, the total content of water and the polyhydric alcohol(s) ranges from 50 to 75 mass% based on the total mass of the cosmetic composition.

The present invention also relates to a cosmetic process for cleaning the keratinic material, comprising the application onto keratinic materials, in particular skin, eyes and/or lips, of a bi-continuous microemulsion according the invention. In a particular embodiment, the cosmetic process is for cleaning make-up products from keratinic materials, in particular skin, eyes and/or lips.

Advantageous Effects of Invention

[0016] According to the invention it is possible to provide a stable cosmetic composition in the form of a bi-continuous microemulsion and having good performance of cleanabiliy and rinsability.

Detailed description of the invention

[0017] Preferred embodiments of the invention will now be described, with the understanding that these embodiments are in no way limitative on the invention.

[0018] Throughout the present specification, the amounts of the components, where the composition contains more than one substance, are the total amounts of those substances unless otherwise specified. Unless otherwise specified, the materials mentioned may be used alone or in combinations of two or more. In the case of a composition in the form of a bi-continuous microemulsion, when it is diluted in oil or in water, a heterogeneous appearance is always observed. When a composition in the form of a bi-continuous is diluted in water, pieces of oily gel in suspension are observed, and when a composition in the form of a bi-continuous is diluted in oil, pieces of aqueous gel in suspension are observed.

In contrast, during dilution, emulsions other than a bi-continuous microemulsion have a different behavior. When an O/W emulsion is diluted in an aqueous solvent, it gradually reduces without having a heterogeneous and lumpy appearance. This same O/W emulsion, on dilution with oil, has a heterogeneous appearance (pieces of O/W emulsion suspended in the oil). When a W/O emulsion is diluted with an aqueous solvent, it has a heterogeneous appearance (pieces of W/O emulsion suspended in the water). This same W/O emulsion, when diluted in oil, gradually reduces without having a heterogeneous and lumpy appearance.

The composition in the form of a bi-continuous microemulsion can be dispersed quickly in both oil and water.

[0019] The cosmetic composition of the invention is in the form of a bi-continuous microemulsion that comprises polyglycerol fatty acid esters, the polyglycerol fatty acid esters comprising a multi chain polyglycerol fatty acid ester having two or more fatty acid residues, and the polyglycerol fatty acid esters having a total HLB value of greater than 12.0, an oil, a polyhydric alcohol and water.

Polyglycerol fatty acid ester(s)

The polyglycerol fatty acid ester(s) in the cosmetic composition of the invention includes a multichain polyglycerol fatty acid ester having two or more fatty acid residues. The total HLB value of the polyglycerol fatty acid ester(s) in the cosmetic composition of the invention is greater than 12.

[0020] In a particular embodiment, the polyglycerol fatty acid ester is an ester of polyglycerin and a fatty acid. The polyglycerol fatty acid ester includes a polyglycerin backbone and a fatty acid residue bonded to the polyglycerin backbone. In a particular embodiment, the cosmetic composition includes one or more polyglycerol fatty acid esters, such as 2 to 8, 3 to 7 or 4 to 6 polyglycerol fatty acid esters.

[0021] In a particular embodiment, the total HLB value of the polyglycerol fatty acid ester(s) is greater than 12, and in particular 12.1 or greater, 12.2 or greater, 12.3 or greater, 12.4 or greater, 12.5 or greater or 12.6 or greater. In a particular embodiment, the total HLB value of the polyglycerol fatty acid ester(s) is 15.0 or lower, 14.5 or lower, 14.0 or lower, 13.5 or lower, 13.0 or lower, 12.9 or lower, 12.8 or lower, 12.7 or lower, 12.6 or lower, 12.5 or lower or 12.4 or lower, for example. So, in a particular embodiment, the total HLB value of the polyglycerol fatty acid ester(s) ranges from 12.1 to 15.0, 12.1 to 14.0, 12.1 to 13.5, 12.1 to 13.0, or 12.1 to 12.8.

[0022] The HLB is an index indicating the balance between hydrophilicity and lipophilicity (Hydrophilic-Lipophilic Balance). The HLB value for each polyglycerol fatty acid ester is calculated by the following formula.

HLB = 20(1 - S/A)

S: Ester saponification value

A: Fatty acid neutralization value

[0023] The total HLB value is calculated from the HLB value of each polyglycerol fatty acid ester, and the content ratio of each polyglycerol fatty acid ester with respect to the total amount of polyglycerol fatty acid esters.

[0024] If the cosmetic composition includes more than one polyglycerol fatty acid ester, the HLB value of each polyglycerol fatty acid ester may be 5 to 15 respectively, for example.

[0025] The cosmetic composition may contain one or more polyglycerol fatty acid esters with an HLB value of greater than 12 (high-HLB polyglycerol fatty acid esters), and one or more polyglycerol fatty acid esters with an HLB value of 12 or lower (low-HLB polyglycerol fatty acid esters). In a particular embodiment, the HLB value (separate HLB value) of a high-HLB polyglycerol fatty acid ester is 13.0 or greater, 13.5 or greater, 14.0 or greater or 14.5 or greater. In a particular embodiment, the total HLB value (separate HLB value) of a low-HLB polyglycerol fatty acid ester is 11 or lower, 10 or lower, 9 or lower, 8 or lower, 7 or lower, 6 or lower or 5 or lower.

[0026] In a particular embodiment, the polymerization degree of glycerin in the polyglycerol fatty acid ester ranges from 2 to 10, for example. In a particular embodiment, the polymerization degree of glycerin is 3 or greater, 4 or greater, 5 or greater, 6 or greater, 7 or greater, 8 or greater or 9 or greater, and 10 or lower, 9 or lower, 8 or lower, 7 or lower, 6 or lower, 5 or lower, 4 or lower or 3 or lower, for example.

[0027] In a particular embodiment, the polyglycerol fatty acid ester also includes two or more polyglycerol fatty acid esters with different glycerin polymerization degrees. For example, in a particular embodiment, the polyglycerol fatty acid ester includes one or more polyglycerol fatty acid esters having a glycerin polymerization degree of 2 to 5, and one or more polyglycerol fatty acid esters having a glycerin polymerization degree of 6 to 10. For example, in a particular embodiment, the polyglycerol fatty acid ester includes one or more polyglycerol fatty acid esters having a glycerin polymerization degree of 2 and one or more polyglycerol fatty acid esters having a glycerin polymerization degree of 10. [0028] In a particular embodiment, the fatty acid residue has a straight or branched carbon chain, in a particular embodiment, the fatty acid residue is an unsaturated fatty acid residue containing an unsaturated bond (carbon-carbon double bond), or it may be a saturated fatty acid residue lacking any unsaturated bonds.

[0029] In a particular embodiment, the number of carbon atoms of the fatty acid residue is 8 or greater, 9 or greater, 10 or greater, 11 or greater, 12 or greater, 13 or greater, 14 or greater, 15 or greater, 16 or greater or 17 or greater, and 22 or less, 21 or less, 20 or less, 19 or less, 18 or less, 17 or less, 16 or less, 15 or less, 14 or less, 13 or less, 12 or less or 11 or less. In a preferred embodiment, the number of carbon atoms of the fatty acid residue ranges from 8 to 18, for example.

[0030] In a particular embodiment, Examples of fatty acid residues include oleic acid, myristic acid, capric acid, lauric acid, palmitic acid, stearic acid, isostearic acid, and mixtures thereof.

[0031 ] In a particular embodiment, the polyglycerol fatty acid ester(s) comprises a naturally derived polyglycerol fatty acid ester.

[0032] In a particular embodiment, the total content of the polyglycerol fatty acid ester(s) is 4 mass% or greater, 6 mass% or greater, 8 mass% or greater, 10 mass% or greater, or 12 mass% or greater, 14 mass% or greater or 16 mass% or greater, and 24 mass% or lower, 22 mass% or lower, 20 mass% or lower, 18 mass% or lower or 16 mass% or lower, based on the total mass of the cosmetic composition. In a particular embodiment, the total content of the polyglycerol fatty acid ester ranges from 8 to 24 mass% based on the total mass of the cosmetic composition. [0033] In a particular embodiment, the polyglycerol fatty acid ester includes one or more multichain polyglycerol fatty acid esters.

[0034] In a particular embodiment, the number of fatty acid residues in the multichain polyglycerol fatty acid ester are two or more, such as 3 or more, 4 or more or 5 or more, and 6 or less or 5 or less. In a particular embodiment, the number of fatty acid residues in the multichain polyglycerol fatty acid ester is 2 to 6, 3 to 6, 4 to 6, 5 to 6, 2 to 5, 3 to 5 or 4 to 5, for example.

[0035] The multichain polyglycerol fatty acid ester may be a low-HLB polyglycerol fatty acid ester. In a particular embodiment, each HLB value of the multichain polyglycerol fatty acid ester is 10 or lower or 8 or lower, and 5 or greater or 6 or greater, for example.

[0036] In a particular embodiment, the multichain polyglycerol fatty acid ester is one or more selected from the group consisting of polyglyceryl- 10 pentaoleate (HLB value: 7), polyglyceryl- 10 trioleate, polyglyceryl- 10 dioleate, and mixtures thereof. [0037] In a particular embodiment, the content of the multichain polyglycerol fatty acid ester is 0.3 parts by mass or greater, 0.5 parts by mass or greater, 1.0 parts by mass or greater, 1.5 parts by mass or greater, 2.0 parts by mass or greater, 2.5 parts by mass or greater or 3.0 parts by mass or greater, and 5 parts by mass or lower, 4 parts by mass or lower or 3 parts by mass or lower, with respect to 100 parts by mass as the total mass of the polyglycerol fatty acid ester. In a particular embodiment, the content of the multichain polyglycerol fatty acid ester ranges from 0.3 parts by mass to 5 parts by mass with respect to 100 parts by mass as the total mass of the polyglycerol fatty acid ester.

[0038] In a particular embodiment, the polyglycerol fatty acid ester includes one or more single-chain polyglycerol fatty acid esters with a single fatty acid residue.

[0039] In a particular embodiment, examples of single-chain polyglycerol fatty acid esters include polyglyceryl- 10 myristate, polyglyceryl-2 caprate, polyglyceryl-2 sesquioleate, polyglyceryl- 10 oleate, and mixtures thereof.

[0040] In a particular embodiment, the single-chain polyglycerol fatty acid ester includes the aforementioned high-HLB polyglycerol fatty acid ester, or it includes both the aforementioned high-HLB polyglycerol fatty acid ester and low-HLB polyglycerol fatty acid ester.

[0041] In a particular embodiment, the content of the single-chain polyglycerol fatty acid ester is 50 parts by mass or greater, 60 parts by mass or greater, 70 parts by mass or greater, 80 parts by mass or greater, 90 parts by mass or greater or 95 parts by mass or greater, and 99 parts by mass or lower, 98 parts by mass or lower, with respect to 100 parts by mass as the total mass of the polyglycerol fatty acid ester.

According to a specific embodiment, the composition of the invention contains: at least a multichain polyglycerol fatty acid ester selected from the group consisting of polyglyceryl- 10 pentaoleate (HLB value: 7), polyglyceryl- 10 trioleate, polyglyceryl- 10 dioleate, and mixtures thereof, and at least one single-chain polyglycerol fatty acid esters, preferably at least two, more preferably at least three single-chain polyglycerol fatty acid esters chosen from polyglyceryl- 10 myristate, polyglyceryl-2 caprate, polyglyceryl-2 sesquioleate, polyglyceryl- 10 oleate, and mixtures thereof.

According to a specific embodiment, the composition of the invention contains less than 1% by weight relative to the total weight of the composition, preferably less than 0.5% by weight, and is preferably totally free of additional surfactant. Thus, preferably, the surfactant of the composition according to the invention consists of polyglycerol fatty acid ester (s) as above described. on

[0042] In a particular embodiment, the oil is one or more selected from the group consisting of ester oils, ether oils, triglycerides hydrocarbons, and mixtures thereof. Including such oils can further improve the high cleanability performance.

[0043] Examples of oils include ethyl hexyl palmitate, caprylic/capric triglyceride, dicaprylyl ether, C9-18 alkanes (For example C9-12 alkanes), alkyl coco(caprylates/caprates), almond oil (Prunus Amygdalus Dulcis (Sweet Almond) Oil), cetyl ethylhexanoate, isopropyl palmitate, isopropyl myristate, triethylhexanoin, tridecyl isononanoate, isononyl isononanoate, olive oil, rapeseed oil, camellia oil, sunflower seed oil, macadamia nut oil, corn oil, rice bran oil, avocado oil and meadowfoam seed oil, and mixtures thereof.

[0044] In a particular embodiment, the oil content is 5 mass% or greater, 7 mass% or greater, 8 mass% or greater, 10 mass% or greater, 12 mass% or greater, 14 mass% or greater or 16 mass% or greater, and 40 mass% or lower, 30 mass% or lower, 20 mass% or lower, 18 mass% or lower or 16 mass% or lower, based on the total mass of the cosmetic composition. In a particular embodiment, the content of the oil ranges from 5 to 40 mass% or 10 to 18 mass%, based on the total mass of the cosmetic composition.

[0045] In a particular embodiment, the water content is 10 mass% or greater, 12 mass% or greater, 14 mass% or greater, 16 mass% or greater, 18 mass% or greater, 20 mass% or greater, 22 mass% or greater or 24 mass% or greater, and 40 mass% or lower, 35 mass% or lower, 30 mass% or lower or 28 mass% or lower, based on the total mass of the cosmetic composition. In a particular embodiment, the water content ranges from 10 to 40 mass%, in particular from 15 to 35 mass%, for example, based on the total mass of the cosmetic composition.

Polyhydric alcohol

[0046] In the present invention, a polyhydric alcohol is a compound having two or more alcoholic hydroxyl groups. A polyhydric alcohol can act to induce formation of a bi-continuous microemulsion by controlling the curvature of the surfactant by interaction between the polyglycerin groups in the polyglycerol fatty acid ester.

[0047] Examples of polyhydric alcohols include those with 2 or 3 alcoholic hydroxyl groups. In a particular embodiment, the number of carbon atoms of the polyhydric alcohol ranges from 2 to 10 or from 3 to 8, for example. In a particular embodiment, the polyhydric alcohol is one or more selected from the group consisting of glycerin, caprylyl glycol, butylene glycol (1 ,3- butylene glycol or 1 ,2-butylene glycol), dipropylene glycol, propanediol (1 ,2-propanediol or 1 ,3-propanediol), pentylene glycol, and mixtures thereof. A single type of polyhydric alcohol may be contained alone, or two or more may be contained in admixture. [0048] In a particular embodiment, the total polyhydric alcohol(s) content is 20 mass% or greater, 25 mass% or greater, 30 mass% or greater or 35 mass% or greater or 40 mass% or greater, and 60 mass% or lower, 55 mass% or lower, 50 mass% or lower or 45 mass%, based on the total mass of the cosmetic composition. In a particular embodiment, the total polyhydric alcohol content ranges from 20 to 60 mass% or from 30 to 50 mass%, for example, based on the total mass of the cosmetic composition.

[0049] In a particular embodiment, the total content of water and polyhydric alcohols is 40 mass% or greater, 45 mass% or greater, 50 mass% or greater, 55 mass% or greater, 60 mass% or greater or 65 mass% or greater, and 85 mass% or lower, 80 mass% or lower, 75 mass% or lower or 70 mass% or lower, based on the total mass of the cosmetic composition. In a particular embodiment, the water content ranges from 40 to 85 mass%, in particular from 50 to 75 mass% or preferably from 60 to 70 mass%, based on the total mass of the cosmetic composition.

Additional components (optional)

[0050] The cosmetic composition may also contain components other than the components mentioned above (other components). Examples of other components include pH adjustors, preservatives, active ingredients, colorants and perfumes. Specific examples of other components include tocopherol, sodium benzoate and citric acid, or citric acid, succinic acid, gluconic acid, malic acid, lactic acid, or mixtures thereof, as pH adjustors. Examples of preservatives include sodium benzoate, capryl glycol, phenylethyl alcohol, isopropylmethylphenol, chlorhexidine digluconate, hydroxyacetophenone, chlorphenesin, salicylic acid, potassium sorbate, ethyl paraoxybenzoate, butyl paraoxybenzoate, propyl paraoxybenzoate, methyl paraoxybenzoate, phenoxyethanol, benzalkonium chloride, and mixtures thereof. Active ingredients include components that provide a beauty effect for skin, such as skin roughening inhibitors and wrinkle inhibitors, examples of which are fat-soluble vitamins, including vitamin A compounds such as retinol, retinol palmitate and retinol acetate, vitamin D compounds such as ergocalciferol and cholecalciferol, and vitamin E compounds such as tocopherol and tocotrienol.

[0051 ] The cosmetic composition of the invention is a cosmetic composition having high stability while being in the form of a bi-continuous microemulsion. Since the cosmetic composition of the invention is in the form of a bi-continuous microemulsion, it also has high cleaning ability and a comfortable sensation during use. The cosmetic composition of the invention can also exhibit the effect described above while maintaining a high naturality.

[0052] The natural origin index may be 90% or greater, as defined by ISO 16128-2:2017 for cosmetic compositions. The natural origin index defined by ISO 16128-2:2017 is a value indicating the proportion of naturally derived materials among the total starting materials in a formula.

[0053] The cosmetic composition can be produced, for example, by mixing component (A) which includes an oil and other components as necessary, component (B) which includes water, a polyhydric alcohol and other components as necessary, and component (C) which includes a polyglycerol fatty acid ester, while heating, and then cooling the mixture to room temperature and mixing in other components. The heating temperature may be 60 to 80° C, for example.

[0054] The cosmetic composition of this embodiment can be suitably used as a cleansing oil, cleansing liquid or cleansing gel, for example.

The invention also relates to a cosmetic process for cleaning the keratinic material, comprising the application onto keratinic materials, in particular skin, eyes and/or lips, of a bi-continuous microemulsion as disclosed above. In particular, the cosmetic process is for cleansing make-up products from keratinic materials, in particular skin, eyes and/or lips.

Examples

[0055] The present invention will now be explained in specific detail through the following Examples, with the understanding that the invention is not limited by the Examples.

[0056] < Preparation of cosmetic compositions>

Phase A was prepared by mixing the components listed as "A" in Table 1 , and the components listed as "B" in Table 1 were mixed to prepare phase B (aqueous phase). The components listed as "C" in Table 1 were heated in a container at 60° C to 70° C until complete dissolution to prepare phase C (surfactant phase). Phase B was added to and uniformly mixed with phase C, and heating was then stopped. Phase A was added to the vessel containing phase B and phase C, and the mixture was stirred at room temperature to homogeneity. The components listed as "D" and the components listed as "E" were added to the vessel containing phases A, B and C, and the mixture was stirred to homogeneity. Cosmetic compositions for the Examples and Comparative Examples were prepared in this manner. [Table 1 ]

[0057] Evaluation of bi-continuous microemulsion formation>

In the evaluation of whether bi-continuous microemulsion were formed or not in each example, "A" indicates that a bi-continuous microemulsion was formed, and "C" indicates that bi- continuous microemulsion was not formed and that the phase separation was observed. To evaluate whether bi-continuous microemulsion was formed or not, solubilization property of an oil-soluble pigment and water-soluble pigment was checked. Each sample was placed in a glass bottle, a water-soluble pigment and oil-soluble pigment were added respectively, and the aspect after 1 night was visually observed. When the composition was transparent immediately after preparation and coloration with both pigments was observed when they were added, it was judged that a bi-continuous microemulsion had formed. [0058] stability evaluation

The stability was evaluated under conditions of 4°C, 50° C and room temperature. Specifically, the following method was used for the evaluation.

After placing the cosmetic composition in a transparent glass container, it was sealed with a covering and stored for 1 month at each temperature. After storage and restoration to room temperature (25° C), the change of aspect was visually observed.

[0059] For the evaluation at 4°C, "A" indicates "stable", and "C" indicates that "watery exudation" occurred.

[0060] For the evaluation at 50° C, "A" indicates "stable", and "C" indicates that "oily exudation" occurred.

[0061] For the evaluation at room temperature, it was shown to be "stable".

[0062] The stability evaluation results are shown in Tables 2 and 3. The contents of each of the components in Tables 2 and 3 are contents based on the total mass of the cosmetic composition, where the

units are "mass%".

The compositions with notation ‘A’ for each criteria are acceptable in the context of the invention.

[0063]

[Table 2]

All the examples 1 to 8 (illustrative examples of the invention) are in the form of a bi-continuous emulsion and are stable at all tested conditions.

[Table 3]

These results demonstrate that the presence of the polyglycerol fatty acid esters comprising a multi chain polyglycerol fatty acid ester having two or more fatty acid residues, and the polyglycerol fatty acid esters having an HLB value of greater than 12.0, is essential to form a bi-continuous micro-emulsion with expected stability at all conditions.

[0064] The cosmetic compositions of the Examples were confirmed to have high cleaning ability and a comfortable sensation during use. Specifically, the cleaning ability and sensation during usage were evaluated by the following method.

The cleaning ability was evaluated by the following method using waterproof mascara. A 5 mg portion of waterproof mascara (Mascara; Diorshow Iconic Overcurl Waterproof) was coated onto a 1 cm circular area on a vinyl chloride plate and dried at least overnight. A 20 mg portion of the cosmetic composition of the Examples and Comparative Examples was put onto the mascara and massaged over it 80 times using a finger. After rinsing with tap water, the state of the remaining mascara was compared to evaluate the cleansing ability.

The rinsing evaluation was conducted by an evaluation panel of 7 cosmetic experts. The Examples were confirmed to have high cleaning ability and a comfortable sensation during use.

Claims

1 . A cosmetic composition in the form of a bi-continuous microemulsion comprising: polyglycerol fatty acid esters, the polyglycerol fatty acid esters comprising a multi chain polyglycerol fatty acid ester having two or more fatty acid residues, and the polyglycerol fatty acid esters having a total HLB value of greater than 12.0, an oil, a polyhydric alcohol, and water.

2. The cosmetic composition according to claim 1 , wherein the polyglycerol fatty acid esters further comprise a single-chain polyglycerol fatty acid ester having one fatty acid residues.

3. The cosmetic composition according to claim 1 or 2, wherein the polyglycerol fatty acid esters comprise the fatty acid residue having 8 to 18 carbon atoms.

4. The cosmetic composition according to any one of claims 1 to 3, wherein the multi chain polyglycerol fatty acid ester has 2 to 6 fatty acid residues.

5. The cosmetic composition according to any one of claims 1 to 4, wherein the multi chain polyglycerol fatty acid ester is selected from the group consisting of polyglyceryl- 10 pentaoleate, polyglyceryl- 10 trioleate, poly glyceryl- 10 dioleate, and mixtures thereof.

6. The cosmetic composition according to any one of claims 1 to 5, wherein the polyglycerol fatty acid esters comprise a naturally derived polyglycerol fatty acid ester.

7. The cosmetic composition according to any one of claims 1 to 6, wherein the content of the multi chain polyglycerol fatty acid ester is 0.3 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the total mass of the polyglycerol fatty acid esters.

8. The cosmetic composition according to any one of claims 1 to 7, wherein the total content of the polyglycerol fatty acid esters ranges from 10 to 20 mass% based on the total mass of the cosmetic composition.

9. The cosmetic composition according to any one of claims 1 to 8, wherein the total content of the oil ranges from 10 to 18 mass% based on the total mass of the cosmetic composition.

10. The cosmetic composition according to any one of claims 1 to 9, wherein the total content of the water and the polyhydric alcohol ranges from 50 to 75 mass% based on the total mass of the cosmetic composition.

11. The cosmetic composition according to any one of claims 1 to 10, that is a cleansing oil, a cleansing liquid or a cleansing gel.

12. A cosmetic process for cleaning the keratinic material, comprising the application onto keratinic materials, in particular skin, eyes and/or lips, of a bi-continuous microemulsion according to any one of claims 1 to 11 .

13. The cosmetic process according to claim 12, for cleansing make-up products from keratinic materials, in particular skin, eyes and/or lips.