Composition for cleansing cosmetics

Abstract

To provide a composition for an oily cleansing cosmetic which can be used with wet hands by increasing the solubilized amount of water, can obtain smooth application feeling on the skin during application and can be refreshingly washed away during washing away and to provide a cleansing cosmetic.SOLUTION: There is provided a composition for an oily cleansing cosmetic which comprises the following components (A) to (D), wherein the mixed HLB of the component (A) and the component (B) is 10 to 12 and the total amount of the component (C) and the component (D) is 35 mass% or more. (A) A polyglycerin fatty acid ester composed of a fatty acid having 8 to 10 carbon atoms and a polyglycerol having an average polymerization degree of 5 to 14. (B) A polyglycerin fatty acid ester which is a mono- or diester of an unsaturated and / or branched fatty acid having 18 carbon atoms and a polyglycerol. (C) A liquid oil having an average molecular weight of 300 or more and an IOB of 0.1 to 0.2. (D) A liquid oil having an average molecular weight of less than 300 and an IOB of 0 to 0.25.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a composition for an oil-based cleansing cosmetic containing a specific polyglycerol fatty acid ester and a specific liquid oil, and a cosmetic containing this composition for an oil-based cleansing cosmetic.

Background Art

[0002] There are various types of cleansing cosmetics for removing makeup, but the oil type, which has a high makeup-removing effect and can be easily washed off, is the mainstream. In addition, it is often used when taking a bath, and performance is required such that the cleansing power does not decrease even when used with wet hands.

[0003] As a cleansing cosmetic that can be used with wet hands, there is a cleansing oil formulated with two types of surfactants (see, for example, Patent Document 1), but the blending ratio of the surfactants and the main oil agent were limited. Furthermore, further improvement has been demanded regarding the smooth application feeling on the skin and the ability to solubilize water transparently. Also, as a cleansing cosmetic that can be used with wet hands and can be washed off smoothly when rinsing, there is a cleansing oil formulated with an ester oil or a hydrophilic compound composed of a branched fatty acid or a branched alcohol (see, for example, Patent Document 2), but here too, the main oil agent was limited and the blending of a hydrophilic compound was essential.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide an oily cleansing cosmetic composition that can be used with wet hands by increasing the solubilization amount of water, can provide a smooth application feeling on the skin during application, and can be rinsed off smoothly during rinsing, and a cleansing cosmetic containing this oily cleansing cosmetic composition.

Means for Solving the Problems

[0006] As a result of intensive efforts to solve the above problems, the present inventors have found that by combining two or more types of polyglycerol fatty acid esters and two or more types of liquid oils, the solubilization amount of water increases, and it becomes possible to use it even with wet hands containing a large amount of water. Furthermore, it has been found that a smooth application feeling can be obtained on the skin during application, and it can be rinsed off smoothly during rinsing, leading to the completion of the present invention.

Effects of the Invention

[0007] The oily cleansing cosmetic composition of the present invention and the cleansing cosmetic containing this oily cleansing cosmetic composition can solubilize an amount of water that has not been achievable until now and can be used without problems even with wet hands containing a large amount of water. A smooth application feeling can be obtained on the skin during application, and it can be rinsed off smoothly during rinsing.

Modes for Carrying Out the Invention

[0008] Hereinafter, the present invention will be described in detail. The oily cleansing cosmetic composition of the present invention contains two specific polyglycerol fatty acid esters as components (A) and (B), and two specific liquid oils as components (C) and (D).

[0009] The polyglycerol fatty acid ester of component (A) in the present invention is an ester composed of a fatty acid having 8 to 10 carbon atoms and polyglycerol having an average degree of polymerization of 5 to 14, more preferably 6 to 10. Component (A) is not particularly limited, and examples thereof include at least one selected from the group consisting of hexaglyceryl dicaprate, hexaglyceryl tricaprylate, hexaglyceryl monocaprylate, decaglyceryl pentacaprylate, and the like.

[0010] The polyglycerol fatty acid ester of component (B) in the present invention is a monoester or diester of polyglycerol and an unsaturated and / or branched-chain fatty acid having 18 carbon atoms. When the constituent fatty acid is a straight-chain saturated fatty acid, it crystallizes during low-temperature storage in an oil-based cleansing cosmetic composition, resulting in poor low-temperature storage stability. The average degree of polymerization of the polyglycerol constituting the component is preferably 2 to 14, more preferably 2 to 10. Component (B) is not particularly limited, and examples thereof include at least one selected from the group consisting of decaglyceryl dioleate, hexaglyceryl dioleate, decaglyceryl diisostearate, hexaglyceryl monoisostearate, and diglyceryl monooleate.

[0011] The method for calculating the average degree of polymerization of the polyglycerol constituting the polyglycerol fatty acid esters of components (A) and (B) in the present invention is determined from the hydroxyl value based on the following formula. The hydroxyl value was measured by a known method. OHV = 56110(n + 2) / (74n + 18) OHV: Hydroxyl value of polyglycerol n: Average degree of polymerization of polyglycerol

[0012] The content of cyclic compounds in the polyglycerol constituting the polyglycerol fatty acid esters of components (A) and (B) in the present invention is preferably 30% or less, more preferably 20% or less, from the viewpoints of low-temperature storage stability and the refreshing feeling during rinsing. The content of cyclic compounds in polyglycerol can be analyzed using a liquid chromatography-mass spectrometer (LC / MS).

[0013] The polyglycerol fatty acid esters of components (A) and (B) in the present invention can be easily obtained by esterifying polyglycerol and fatty acids by a conventional method or by addition polymerization of fatty acids and glycidol. The esterification of polyglycerol and fatty acids is not particularly limited. For example, polyglycerol and fatty acids can be heated in the presence of an acid catalyst (phosphoric acid, p-toluenesulfonic acid, etc.) or an alkali catalyst (caustic soda, etc.), or without a catalyst while removing water, preferably in the range of 100 to 300 °C, more preferably 120 to 260 °C. The reaction may also be carried out in the presence of an inert gas. The ester thus obtained may be purified according to the purpose. For purification, in addition to distillation techniques such as distillation under reduced pressure, molecular distillation, and steam distillation, extraction with an organic solvent, fractionation, and chromatographic separation using a column filled with a synthetic adsorbent or a gel filtration agent can also be used. In addition, instead of fatty acids, an ester of fatty acid may be used to perform transesterification with polyglycerol to obtain the desired polyglycerol fatty acid ester.

[0014] The HLB in the present invention refers to the value measured by the following Griffin's calculation method, and the mixed HLB of the polyglycerol fatty acid esters of component (A) and component (B) is calculated using additivity. That is, the mixed HLB in the present invention is the weighted average value of component (A) and component (B). The saponification value and the neutralization value were measured by known methods. HLB = 20(1 - S / A) S: Saponification value of polyglycerol fatty acid ester A: Neutralization value of raw material fatty acid

[0015] The liquid oil of component (C) in the present invention is a liquid oil having an average molecular weight of 300 or more and an IOB of 0.1 to 0.2, preferably 0.1 to 0.15. The liquid oil of component (C) is not particularly limited, and examples thereof include at least one selected from the group consisting of cetyl ethylhexanoate (IOB 0.13, average molecular weight 368), ethylhexyl palmitate (IOB 0.13, average molecular weight 369), isopropyl isostearate (IOB 0.15, average molecular weight 327), and the like.

[0016] The liquid oil of component (D) in the present invention is a liquid oil having an average molecular weight of less than 300 and an IOB of 0 to 0.25. The liquid oil of component (D) is not particularly limited, and examples thereof include at least one selected from the group consisting of hydrogenated polyisobutene (IOB 0, average molecular weight 280), isododecane (IOB 0, average molecular weight 170), dicaprylyl ether (IOB 0.06, average molecular weight 242), isopropyl myristate (IOB 0.18, average molecular weight 271), isononyl isononanoate (IOB 0.2, average molecular weight 285), and the like.

[0017] The average molecular weight of the liquid oils of components (C) and (D) in the present invention can be calculated, for example, from the structural formula or molecular formula.

[0018] The IOB of the liquid oils of components (C) and (D) in the oily cleansing cosmetic composition of the present invention is a value representing the ratio of the inorganic value to the organic value. It is an abbreviation of Inorganic / Organic Balance (inorganic / organic ratio), and based on the method of Koda et al. (Yoshio Koda, "Organic Conceptual Diagram - Basics and Applications -", Sankyo Publishing (1984)), the organic value and the inorganic value are determined, and it is determined by inorganic value / organic value.

[0019] From the viewpoints of water resistance and the refreshing feeling during washing, the total content of the liquid oils of components (C) and (D) in the oily cleansing cosmetic composition of the present invention is preferably 35% by mass or more, more preferably 50% by mass or more, as the total amount of the liquid oils of components (C) and (D).

[0020] In the composition for an oil-based cleansing cosmetic of the present invention, the content of the liquid oil of component (C) is preferably 15 to 90% by mass, more preferably 40 to 90% by mass, and still more preferably 40 to 85% by mass in the liquid oil, from the viewpoints of the feeling of application to the skin and water resistance. When two or more kinds of liquid oils of component (C) are used, the content refers to the total amount thereof.

[0021] In the composition for an oil-based cleansing cosmetic of the present invention, the content of the liquid oil of component (D) is preferably 85% by mass or less, more preferably 60% by mass or less in the liquid oil, from the viewpoint of the feeling of application to the skin. When two or more kinds of liquid oils of component (D) are used, the content refers to the total amount thereof.

[0022] The composition for an oil-based cleansing cosmetic of the present invention can contain, as appropriate according to its use and purpose, components usually used in cosmetics, as long as the effects of the present invention are not impaired. Although not particularly limited, for example, surfactants other than the polyglycerin fatty acid esters of the above components (A) and (B), oil agents other than the liquid oils of components (C) and (D), aqueous gelling agents, oil gelling agents, ultraviolet absorbers, powders, antioxidants, preservatives, fragrances, colorants, chelating agents, cooling agents, thickeners, plant extracts, vitamins, neutralizing agents, moisturizing agents, anti-inflammatory agents, pH adjusters, amino acids, and the like can be mentioned.

[0023] The method for preparing the composition for an oil-based cleansing cosmetic of the present invention is not particularly limited, but for example, it can be prepared by a method of dissolving all components at 60°C or higher and then cooling to room temperature.

[0024] The composition for an oil-based cleansing cosmetic of the present invention preferably has a transparent appearance, and when used in an oil-based cleansing cosmetic, it can be washed away smoothly when rinsed. The cleansing cosmetic in the present invention is preferably an oil-based cleansing cosmetic that can be used even with particularly wet hands.

[0025] The content of the composition for the oily cleansing cosmetic in the cleansing cosmetic of the present invention is preferably 30 to 100% by mass, more preferably 50 to 100% by mass, and even more preferably 80 to 100% by mass from the viewpoint of cleansing power.

Examples

[0026] Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to these examples. Unless otherwise specified, “%” means “% by mass”.

[0027] Preparation of the composition for the oily cleansing cosmetic Examples 1 to 18 and Comparative Examples 1 to 9 Using a 200 ml beaker, each component was heated and dissolved at 80° C., and then cooled to room temperature while stirring to prepare 100 g of the composition for the oily cleansing cosmetic of the products of the present invention 1 to 18 and the comparative products 1 to 9. Each polyglycerol fatty acid ester was synthesized by known means.

[0028] For the compositions for the oily cleansing cosmetic of the products of the present invention 1 to 18 and the comparative products 1 to 9, the appearance properties, water resistance, emulsion particle size, feeling of application to the skin, and refreshing feeling during washing were evaluated according to the following criteria. The results are shown in Tables 1 to 4.

[0029] (Test Example 1: Appearance properties) 10 g of the compositions for the oily cleansing cosmetic of the products of the present invention 1 to 18 and the comparative products 1 to 9 immediately after preparation were placed in a vial (capacity 20 ml, inner diameter 2.5 cm), and the appearance properties were visually observed according to the following evaluation criteria.

[0030] (Evaluation criteria) 〇: No turbidity or separation is observed. △: Slight turbidity is observed. ×: Separated.

[0031] (Test Example 2: Water resistance test) Assuming use with wet hands containing a large amount of water, 20 g of the oily cleansing cosmetic compositions of Invention Products 1 to 18 and Comparative Products 1 to 9 were placed in a vial (capacity 50 ml, inner diameter 3.2 cm), and the mixture was prepared by adding water little by little while stirring, and the limit water addition rate for maintaining a stable and transparent state visually was determined from the following formula. Limit water addition rate (%) = E / 20×100 E: Amount of added water (g)

[0032] (Test Example 3: Emulsion particle size) 1 g of the oily cleansing cosmetic compositions of Invention Products 1 to 18 and Comparative Products 1 to 9 were placed in a vial (capacity 100 ml, inner diameter 3.2 cm). After adding 99 g of water and mixing, the particle size distribution was measured with a particle size distribution analyzer (BECKMAN COULTER LS 13 320). The average diameter obtained was taken as the emulsion particle size.

[0033] (Test Example 4: Application feeling on the skin) 1 g of the oily cleansing cosmetic compositions of Invention Products 1 to 18 and Comparative Products 1 to 9 were applied to the face and massaged for 30 seconds. The application feeling on the skin during application was evaluated in three grades according to the following evaluation criteria.

[0034] (Evaluation criteria) 〇: Does not slip upward, smooth △: Slightly slips upward, smooth ×: Slips upward, no application feeling

[0035] (Test Example 5: Feeling of freshness during washing) 1 g of the oily cleansing cosmetic compositions of Invention Products 1 to 18 and Comparative Products 1 to 9 were applied to the face and massaged for 30 seconds, and then rinsed off with water. The feeling of freshness during washing was evaluated in three grades according to the following evaluation criteria.

[0036] (Evaluation criteria) 〇: Can be rinsed off cleanly △: Slight stickiness remains ×: Not clean, stickiness remains

[0037]

Table 1

[0038]

Table 2

[0039]

Table 3

[0040]

Table 4

[0041] As is clear from the results of Tables 1 to 4, all of the compositions for oily cleansing cosmetics of the products 1 to 18 of the present invention were excellent in appearance properties and water resistance, and a smooth application feeling on the skin and a refreshing feeling during washing were obtained. Comparative products 1, 3, and 5 that did not contain the liquid oil of component (D) were not satisfactory in terms of water resistance and refreshing feeling during washing. Comparative products 2, 4, and 6 that did not contain the liquid oil of component (C) slid smoothly on the skin during application, had a poor application feeling, and furthermore had a strong residue feeling on the skin during rinsing and were inferior in terms of refreshing feeling. Also, comparative products 7, 8, and 9 in which the content of the liquid oils of components (C) and (D) was 35% or less did not exhibit water resistance or a refreshing feeling during washing.

[0042] Examples of the formulation of the cleansing cosmetics of the present invention are given below. The present invention is not limited by these formulation examples. The contents are all expressed as mass% with respect to the total amount of the product. This formulation example can be prepared by appropriately containing various components usually used in cosmetics in the composition for oily cleansing cosmetics according to their uses and purposes, heating and dissolving all components at 80°C, and then cooling to room temperature while stirring.

[0043] Formulation Example 1 (Cleansing Oil) Using the product of the present invention 1, a cleansing oil containing the product of the present invention was prepared according to the formulation shown in Table 5.

[0044]

Table 5

[0045] Formulation Example 2 (Warming Cleansing Gel) Using the product of the present invention 6, a warming cleansing gel containing the product of the present invention was prepared according to the formulation shown in Table 6.

[0046]

Table 6

[0047] Both the cleansing oil of Formulation Example 1 and the warming cleansing gel of Formulation Example 2 have satisfactory water resistance and good usability such as the feeling of application to the skin during use and the refreshing feeling during washing.

Industrial Applicability

[0048] When the composition for an oil-based cleansing cosmetic of the present invention is used in a cleansing cosmetic, it can be washed away smoothly during washing and a smooth application feeling on the skin can be obtained. Therefore, it can be used in cleansing cosmetics, and in particular, it is possible to provide an oil-based cleansing cosmetic that can be used even with wet hands, which makes a great contribution to the industry.

Claims

1. An oily cleansing cosmetic composition containing the following components (A) to (D), wherein the content of component (A) in the composition is 6.0 to 15.0% by mass, the content of component (B) is 4.5 to 14.0% by mass, the content of component (C) is 23.0 to 73.0% by mass, and the content of component (D) is 20.0 to 60.0% by mass, the mixed HLB of component (A) and component (B) is 10 to 12, and the total amount of component (C) and component (D) is 35% by mass or more. (A) A polyglycerol fatty acid ester composed of a fatty acid having 8 to 10 carbon atoms and polyglycerol having an average degree of polymerization of 5 to 14 (B) A polyglycerol fatty acid ester which is a mono- or diester of an unsaturated and / or branched-chain fatty acid having 18 carbon atoms and polyglycerol, and is at least one selected from the group consisting of decaglyceryl dioleate, hexaglyceryl dioleate, decaglyceryl diisostearate, hexaglyceryl monoisostearate, and diglyceryl monooleate (C) A liquid oil having an average molecular weight of 300 or more and an IOB of 0.1 to 0.2 (D) A liquid oil having an average molecular weight of less than 300 and an IOB of 0 to 0.25

2. The oily cleansing cosmetic composition according to claim 1, wherein the polyglycerol fatty acid ester of component (A) is at least one selected from the group consisting of hexaglyceryl dicaprylate, hexaglyceryl tricaprylate, hexaglyceryl monocaprylate, and decaglyceryl pentacaprylate.

3. The oily cleansing cosmetic composition according to claim 1 or 2, wherein the content of the liquid oil of component (C) is 15 to 90% by mass in the liquid oil.

4. The oily cleansing cosmetic composition according to any one of claims 1 to 3, wherein the content of the liquid oil of component (D) is 85% by mass or less in the liquid oil.

5. A cleansing cosmetic containing the oily cleansing cosmetic composition according to any one of claims 1 to 4.

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