Composition for Oil-Based Cleansing Cosmetics

Abstract

To provide a composition for an oily cleansing cosmetic which is a composition having low temperature storage stability and comprising a hydrocarbon oil in a cleansing cosmetic and a cosmetic comprising the composition, can be used with wet hands and can give a thick application feeling that cannot be obtained by a generally used ester oil and to provide a cleansing cosmetic.SOLUTION: There is provided a composition for an oily cleansing cosmetic which comprises the following components (A) to (C), wherein the mass ratio between the component (A) and the component (B) is 1:1 to 1:3. (A) A polyglycerin fatty acid ester which is an ester composed of a fatty acid having 8 to 10 carbon atoms and a polyglycerol having an average polymerization degree of 5 to 14 and has an HLB of 9 to 11. (B) A polyglycerin fatty acid ester which is a diester of an unsaturated and / or branched fatty acid having 18 carbon atoms and a polyglycerol. (C) A hydrocarbon oil.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 hydrocarbon 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. Also, it is often used during bathing, and performance is required such that the cleansing power does not decrease even when used with wet hands.

[0003] Hydrocarbon oils such as liquid paraffin can, when blended in a cleansing oil, produce a thick application feeling that cannot be obtained with ester oils. As a cleansing cosmetic that can be used with wet hands, there is a cleansing oil blended with a polyglycerol medium-chain fatty acid ester (see, for example, Patent Document 1). However, the blending amount of the hydrocarbon oil was limited. If the blending amount of the hydrocarbon oil was increased beyond this, there was a problem in that the storage stability at low temperatures was poor and separation occurred. Also, an ester of polyglycerol and an unsaturated or branched-chain fatty acid having 18 carbon atoms has been provided to give a hydrocarbon oil composition excellent in transparency and stability over time (see, for example, Patent Document 2). However, this hydrocarbon oil composition gels when mixed with water, resulting in a poor application feeling to the skin when used with wet hands, and there was a problem in that a refreshing feeling could not be obtained during washing.

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 a composition having high low-temperature storage stability containing a hydrocarbon oil and a cosmetic containing the same, which can be used with wet hands and can further provide a thick coating feeling that cannot be obtained with commonly used ester oils, and a cosmetic containing the composition for an oil-based cleansing cosmetic.

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 specific two or more kinds of polyglycerol fatty acid esters, a hydrocarbon oil can be stably contained in a cleansing cosmetic, leading to the completion of the present invention.

Effects of the Invention

[0007] The composition for an oil-based cleansing cosmetic of the present invention and the cleansing cosmetic containing the composition for an oil-based cleansing cosmetic contain a hydrocarbon oil sufficient to provide a thick coating feeling, do not cause separation or turbidity even during low-temperature storage, and have high low-temperature storage stability. In the composition for an oil-based cleansing cosmetic of the present invention and the cleansing cosmetic containing the composition for an oil-based cleansing cosmetic, it has a thickness during application, and the emulsified particle size when washed away is also small, and a feeling of being refreshing and non-greasy can be obtained. Furthermore, a moist feeling can be obtained after being washed away.

Modes for Carrying Out the Invention

[0008] Hereinafter, the present invention will be described in detail. The composition for an oil-based cleansing cosmetic of the present invention contains specific two or more kinds of polyglycerol fatty acid esters as components (A) and (B), and a hydrocarbon oil as component (C).

[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, and has an HLB of 9 to 11. Component (A) is not particularly limited, and examples thereof include at least one selected from the group consisting of hexaglyceryl dicaprate, hexaglyceryl tricaprylate, decaglyceryl pentacaprylate, decaglyceryl hexacaprylate, and the like.

[0010] The polyglycerol fatty acid ester of component (B) in the present invention is a diester of polyglycerol and an unsaturated and / or branched fatty acid having 18 carbon atoms. When the constituent fatty acid is a linear saturated fatty acid, it crystallizes during low-temperature storage in the oil-based cleansing cosmetic composition, resulting in poor low-temperature storage stability. 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, and the like.

[0011] The method for calculating the average degree of polymerization of 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 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 (such as phosphoric acid, p-toluenesulfonic acid, etc.) or an alkali catalyst (such as 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 acids can be used to perform transesterification with polyglycerol to obtain the desired polyglycerol fatty acid ester.

[0013] The HLB in the present invention refers to the value measured by the following calculation method. 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

[0014] The content of the polyglycerol fatty acid ester of component (A) in the composition for an oily cleansing cosmetic of the present invention is preferably 3 to 10% by mass, more preferably 5 to 10% by mass.

[0015] The content of the polyglycerol fatty acid ester of component (B) in the composition for an oily cleansing cosmetic of the present invention is preferably 5 to 15% by mass, more preferably 10 to 15% by mass.

[0016] The mass ratio of the polyglycerol fatty acid esters of components (A) and (B) in the composition for an oily cleansing cosmetic of the present invention is 1:1 to 1:3.

[0017] The hydrocarbon oil of component (C) in the present invention is not particularly limited. For example, at least one selected from the group consisting of hydrogenated polyisobutene, liquid paraffin, light liquid isoparaffin, squalane, isododecane, alkane, etc. may be mentioned. From the viewpoint of the moist feeling after washing, it is preferably liquid paraffin.

[0018] The content of the hydrocarbon oil of component (C) in the composition for an oil-based cleansing cosmetic of the present invention is preferably 20% by mass or more, more preferably 40% by mass or more, and still more preferably 60% by mass or more from the viewpoint of the moist feeling after washing. When two or more kinds of the hydrocarbon oil of component (C) are used, the content refers to the total amount thereof.

[0019] The composition for an oil-based cleansing cosmetic of the present invention can contain components usually used in cosmetics as appropriate according to the use and purpose, as long as the effects of the present invention are not impaired. It is 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 hydrocarbon oil of component (C), aqueous gelling agents, oil-based 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, etc. may be mentioned.

[0020] The method for preparing the composition for an oil-based cleansing cosmetic of the present invention is not particularly limited. For example, it can be prepared by a method of dissolving all components at 60°C or higher and then cooling to room temperature.

[0021] The composition for an oil-based cleansing cosmetic of the present invention preferably has a transparent appearance. When used in an oil-based cleansing cosmetic, a thick coating feeling can be obtained and 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.

[0022] From the perspective of cleansing power, the content of the composition for oily cleansing cosmetics in the cleansing cosmetics of the present invention is preferably 30 to 100% by mass, more preferably 50 to 100% by mass, and still more preferably 80 to 100% by mass.

Examples

[0023] The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified, “%” means “% by mass”.

[0024] Preparation of the composition for oily cleansing cosmetics Examples 1 to 16 and Comparative Examples 1 to 8 Each component was heated and dissolved at 80° C. using a 200 ml beaker according to the contents shown in Tables 1 to 3, and then cooled to room temperature while stirring to prepare 100 g of the composition for oily cleansing cosmetics of the products of the present invention 1 to 16 and comparative products 1 to 8. Each polyglycerol fatty acid ester was synthesized by known means.

[0025] For the compositions for oily cleansing cosmetics of the products of the present invention 1 to 16 and comparative products 1 to 8, the appearance properties, low-temperature storage stability, water resistance, emulsion particle size, refreshing feeling during washing, and moist feeling after washing were evaluated according to the following criteria. The results are shown in Tables 1 to 3.

[0026] (Test Example 1: Appearance properties) 10 g of the compositions for oily cleansing cosmetics of the products of the present invention 1 to 16 and comparative products 1 to 8 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.

[0027] (Evaluation criteria) 〇: No turbidity or separation is observed. △: Slight turbidity is observed. ×: Separated.

[0028] (Test Example 2: Low-temperature storage stability) The compositions for oily cleansing cosmetics of the inventive products 1 to 16 and comparative products 1 to 8 were placed in vials (volume 20 ml, inner diameter 2.5 cm) at 10 g each, and after storing at 5°C for 1 day, the appearance properties were visually observed according to the following evaluation criteria.

[0029] (Evaluation Criteria) 〇: No turbidity or separation is observed. △: Slight turbidity is observed. ×: Separated.

[0030] (Test Example 3: Water Resistance Test) Assuming use with wet hands containing a large amount of water, the compositions for oily cleansing cosmetics of the inventive products 1 to 16 and comparative products 1 to 8 were placed in vials (volume 50 ml, inner diameter 3.2 cm) at 20 g each, and a preparation was made by adding water little by little while stirring. The critical water addition rate for maintaining a stable and transparent state visually was determined from the following formula. Critical water addition rate (%) = E / 20 × 100 E: Amount of added water (g)

[0031] (Test Example 4: Emulsion Particle Size) 1 g of the compositions for oily cleansing cosmetics of the inventive products 1 to 16 and comparative products 1 to 8 was placed in a vial (volume 100 ml, inner diameter 3.2 cm). After adding 99 g of water and mixing, the particle size distribution was measured using a particle size distribution analyzer (BECKMAN COULTER LS 13 320). The average diameter obtained was taken as the emulsion particle size.

[0032] (Test Example 5: Feeling of Refreshment during Washing) 1 g of the compositions for oily cleansing cosmetics of the inventive products 1 to 16 and comparative products 1 to 8 was applied to the face, massaged for 30 seconds, and then rinsed with water. The feeling of refreshment during washing was evaluated in three grades according to the following evaluation criteria.

[0033] (Evaluation Criteria) 〇: Can be rinsed off refreshingly. △: Slight stickiness remains. ×: Does not feel refreshing and stickiness remains.

[0034] (Test Example 6: Moist feeling after washing) 1 g of the oily cleansing cosmetic compositions of the inventive products 1 to 16 and comparative products 1 to 8 was applied to the face, massaged for 30 seconds, and then rinsed off with water. After blotting the water with a towel, the moist feeling after washing was evaluated in three grades according to the following evaluation criteria.

[0035] (Evaluation criteria) 〇: Moist △: Slightly moist ×: Not moist

[0036] [Table 1]

[0037] [Table 2]

[0038] [Table 3]

[0039] As is clear from the results in Tables 1 to 3, the oily cleansing cosmetic compositions of the inventive products 1 to 16 were all excellent in appearance properties, low-temperature storage stability, and water resistance, and a refreshing feeling during washing and a moist feeling after washing were obtained. Comparative products 1, 7 that did not use the polyglycerol fatty acid esters of components (A) and (B) in combination, and comparative product 2 in which the polyglycerol fatty acid esters of components (A) and (B) were used in combination but outside the range of 1:1 to 1:3 in mass ratio, were gelled upon addition of water, etc., and their rinsability was impaired. Further, in comparative products 3, 4 in which the mass ratio of the polyglycerol fatty acid esters of components (A) and (B) was outside the range of 1:1 to 1:3, and comparative products 5, 6 in which the HLB of the polyglycerol fatty acid ester of component (A) was outside the range of 10 to 12, the low-temperature storage stability and water resistance were insufficient. Comparative product 8 that did not contain the hydrocarbon oil of component (C) had no thickness during application and no moist feeling after washing was obtained.

[0040] Examples of the formulation of the cleansing cosmetic 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 contains various components usually used in cosmetics for the composition for an oil-based cleansing cosmetic as appropriate according to its use and purpose, and is prepared by heating and dissolving all the components at 80°C and then cooling to room temperature while stirring.

[0041] Formulation Example 1 (Cleansing Oil) Using the product 4 of the present invention, a cleansing oil containing the product of the present invention was prepared according to the formulation shown in Table 4. The appearance properties, low-temperature storage stability, and water resistance were satisfactory, and the usability such as the refreshing feeling during washing and the moist feeling after washing was good.

[0042] [Table 4]

[0043] Formulation Example 2 (Cleansing Oil Gel) Using the product 5 of the present invention, a cleansing oil gel containing the product of the present invention was prepared according to the formulation shown in Table 5. The appearance properties, low-temperature storage stability, and water resistance were satisfactory, and the usability such as the refreshing feeling during washing and the moist feeling after washing was good.

[0044] [Table 5]

Industrial Applicability

[0045] The composition for an oil-based cleansing cosmetic of the present invention has high low-temperature storage stability. When used in a cleansing cosmetic, it has high low-temperature storage stability, and when washing, it can be washed away refreshingly and has a moist feeling after washing. Therefore, it can be used in a cleansing cosmetic, 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 oil-based cleansing cosmetic composition containing the following components (A) to (C), not containing hydrogenated palm kernel oil, wherein the content of component (A) in the composition is 3 to 10% by mass, the content of component (B) is 5 to 15% by mass, and the content of component (C) is 20 to 92% by mass, and the mass ratio of component (A) to component (B) is 1:1 to 1:

3. (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, and having an HLB of 9 to 11 (B) A polyglycerol fatty acid ester which is a diester of an unsaturated and / or branched-chain fatty acid having 18 carbon atoms and polyglycerol (C) Hydrocarbon oil

2. The oil-based 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, decaglyceryl pentacaprylate, and decaglyceryl hexacaprylate.

3. The oil-based cleansing cosmetic composition according to claim 1 or 2, wherein the polyglycerol fatty acid ester of component (B) is at least one selected from the group consisting of decaglyceryl dioleate, hexaglyceryl dioleate, and decaglyceryl diisostearate.

4. A cleansing cosmetic containing the oil-based cleansing cosmetic composition according to any one of claims 1 to 3.

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