Oil-Based Solid Cosmetic

Abstract

An solid cosmetic which contains 1 to 30% by mass of (A) a solid oil component having a melting point of 50 to 120° C., 50 to 95% by mass % of (B) a liquid oil component, 3 to 40% by mass % of (C) a nonionic surfactant having an HLB value of 5 to 13, 0.1 to 20% by mass % of (D) a powder having a volume average particle diameter of 1 to 200 μm, and 0.1 to 10% by mass of (E) fumed silica is excellent in cleansing property, washing-off property and refreshing feeling after washing, and is also excellent in quality stability such as appearance and uniformity of composition.

Claims

1. An oil-based solid cosmetic comprising: 1 to 30% by mass of (A) a solid oil component having a melting point of 50 to 120° C., 50 to 95% by mass % of (B) a liquid oil component, 3 to 40% by mass % of (C) a nonionic surfactant having an HLB value of 5 to 13, 0.1 to 20% by mass % of (D) a powder having a volume average particle diameter of 1 to 200 μm, and 0.1 to 10% by mass of (E) fumed silica.

2. The oil-based solid cosmetic according to claim 1, wherein the component (D) is a clay mineral or a carbon powder.

3. The oil-based solid cosmetic according to claim 1, wherein the component (E) is fumed silica having a specific surface area of 30 m.sup.2/g or more.

4. The oil-based solid cosmetic according to claim 1, further comprising 0.1 to 3% by mass of water as a component (F).

5. The oil-based solid cosmetic according to claim 1, wherein the component (A) is a hydrocarbon wax.

6. The oil-based solid cosmetic according to claim 1, wherein the component (C) is a liquid nonionic surfactant at 25° C.

7. The oil-based solid cosmetic according to claim 1, wherein the component (E) is untreated fumed silica.

8. The oil-based solid cosmetic according to claim 1, wherein a ratio by mass of the component (E) to the component (D) is 0.01 to 10.

9. The oil-based solid cosmetic according to claim 1, wherein it is a cleansing cosmetic or a massage cosmetic.

10. A method for removing a makeup on the skin comprising: the oil-based solid cosmetic according to claim 1 is applied to the makeup, and then the makeup is washed off with water or lukewarm water.

Description

EXAMPLES

[0049] Hereinafter, the present invention will be further described with reference to Examples and Comparative Examples, but the present invention is not limited by these Examples. The content of each ingredient in formulations described below is expressed in % by mass in terms of the whole composition unless otherwise specified.

[0050] The evaluation methods of the oil-based solid cosmetic in the following Examples and Comparative Examples are as follows.

[0051] (Makeup-Removal Property, Washing-Off Property, Refreshing Feeling after Washing) Product

[0052] Each of 10 female evaluators having an experience to use a cosmetic applied a commercially available powder foundation (CEZANNE UV Foundation EX PLUS available from CEZANNE Corp.) to the skin to make a makeup. Subsequently, the makeup was cleansed with a sample for evaluation. With respect to each evaluation item, each evaluator scored at five levels of 1 to 5 according to the evaluation criteria shown in (1) below, and an average value of scores of the 10 evaluators was calculated. Performance as a cleansing cosmetic was determined according to the four-stage determination criteria shown in (2) below.

[0053] (1) Evaluation Criteria [0054] 5: Good [0055] 4: Slightly Good [0056] 3: Cannot say either [0057] 2: Slightly poor [0058] 1: Poor

[0059] (2) Four-Stage Determination Criteria

[0060] Double Circle: Average Point is 4 to 5

[0061] Single Circle: Average Point is 3 or more and less than 4

[0062] Delta: Average Point is 2 or more and less than 3

[0063] X: Average Point is less than 2

[0064] (State of Sedimentation of Powder and State of Color Separation)

[0065] A sample for evaluation of 150 g was melted at 80° C. and then was poured into a paper cup having an internal volume of 250 mL at 70° C., and the content was allowed to cool and solidified at room temperature (25° C.) for 1 hour, and the content was cut vertically with the paper cup by a cutter knife. Then, the cross section was observed to evaluate the state of sedimentation of powder according to the evaluation criteria described below. In the case of using powders having a different color tone each other in combination, the state of color separation was also evaluated.

[0066] (Evaluation Criteria of State of Sedimentation of Powder)

[0067] Double Circle: No sedimentation of powder due to uniform dispersion.

[0068] Single Circle: In layers upper than ⅕ from the top of the cross section, there was a part in which the powder content is small.

[0069] Delta: In layers upper than ⅕ from the top of the cross section, the powder was not observed.

[0070] X: In layers upper than ⅓ from the top of the cross section, the powder was not observed.

[0071] (Evaluation Criteria of State of Color Separation)

[0072] Double Circle: Same color tone and no color separation over the entire surface.

[0073] Single Circle: In layers upper than ⅕ from the top of the cross section, a part having a slightly different color tone was observed.

[0074] Delta: In layers upper than ⅕ from the top of the cross section, a part having a different color tone was observed.

[0075] X: In layers upper than ⅓ from the top of the cross section, a part having a different color tone was observed.

Examples 1 to 2 and Comparative Examples 1 to 3

[0076] (Oil-Based Solid Cleansing Cosmetic)

[0077] An oil-based solid cleansing cosmetic of the formulation shown in table 1 was prepared according to the following production procedure. In the formulation, two kinds of nonionic surfactants having a different HLB value as component (C) were used in combination, and an HLB value of the component (C) was 8.6 by the weighted average. The obtained oil-based solid cleansing cosmetic was evaluated according to the methods described above as to makeup-removal property, washing-off property, refreshing feeling after washing, state of sedimentation of powder, and state of color separation. The evaluation results are shown in table 1.

[0078] (Production Procedure)

[0079] (1) Components 1 to 7 shown in Table 1 were heated to about 90° C. and mixed uniformly.

[0080] (2) Components 8 to 13 were added to the mixture prepared in the above (1), and then the resultant mixture was uniformly mixed at 90° C.

[0081] (3) The mixture prepared in the above (2) was filled in ajar container at 70° C. in a molten state, and then allowed to cool to obtain an oil-based solid cleansing cosmetic.

TABLE-US-00001 TABLE 1 Example Comparative Example Component (%) 1 2 1 2 3 1 Polyethylene (※1) 7.00 7.00 7.00 7.00 7.00 2 Caprylic/capric triglyceride Balance Balance Balance Balance Balance 3 Dicaprylylyl carbonate 12.00 12.00 12.00 12.00 12.00 4 Purified water 0.50 0.50 0.50 0.50 0.50 5 PEG-20 glyceryl triisostearate 12.00 12.00 12.00 12.00 12.00 (HLB: 10.4) (※2) 6 PEG-5 glyceryl triisostearate 4.00 4.00 4.00 4.00 4.00 (HLB: 3) (※3) 7 Dextrin palmitate (※4) 1.00 8 Moroccan lava clay (※5) 2.00 2.00 2.00 2.00 9 Kaolin (※6) 1.00 10 Silica (Specific surface area 1.00 1.00 200 m.sup.2/g) (※7) 11 Dimethicone treated silica 1.00 (Specific surface area 200 m.sup.2/g) (※8) 12 Tocopherol 0.05 0.05 0.05 0.05 0.05 13 Phenoxyethanol 0.20 0.20 0.20 0.20 0.20 Evaluation Makeup-removal Property ⊚ ⊚ Δ ◯ ◯ Washing-off Property ⊚ ◯ ◯ ◯ X Refreshing Feeling After ⊚ ◯ Δ ◯ X Washing State of Sedimentation of ⊚ ⊚ — X Δ Powder State of Color Separation — ⊚ — — — *1 Product name: PERFORMALENE 500 (New Phase Technology) *2 Product name: UNIOX GT 20-IS (NOF Corporation.) *3 Product name: EMALEX GWIS-305 (Nihon Emulsion Co., Ltd.) *4 Product name: RHEOPEARL KL2 (Chiba Flour Milling Co., Ltd. *5 Product name: GHASSSOUL M (GHASSOUL JAPAN JAMIELA CO., LTD., Color tone: Dark green, Volume average particle diameter: 20 μm) *6 Product name: KAOLIN JP-100 (Takehara Kagaku Kogyo Co., Ltd., Color tone: White, Volume average particle diameter: 11 μm) *7 Product name: AEROSIL 200 Nippon Aerosil Co., Ltd.) *8 Product name: AEROSIL RY200 (Nippon Aerosil Co., Ltd.)

[0082] As seen from the results shown in Table 1, the oil-based solid cleansing cosmetic of the present invention was excellent in properties required for a cleansing cosmetic such as makeup-removal property, washing-off property, and refreshing feeling after washing, and was also excellent in quality stability due to little powder sedimentation and color separation (see Examples 1 and 2). In particular, the cosmetic in which hydrophilic untreated silica was used as the fumed silica of the component (E) was even better excellent in washing-off property and refreshing feeling after washing. On the other hand, when the powder of the component (D) was not contained, the oil-based solid cleansing cosmetic was insufficient in makeup-removal property and refreshing feeling after washing (see Comparative Example 1). When the component (E), i.e. fumed silica was not contained, an oil-based solid cleansing cosmetic having a uniform dispersion of the powder could not be obtained due to a remarkable sedimentation of the powder (see Comparative Example 2). Further, in the case of using a dextrin palmitate that is a conventional thickener for an oil phase instead of the fumed silica, sedimentation of the powder could not be sufficiently prevented, and washing-off property and refreshing feeling after washing were also inferior (see Comparative Example 3).

Examples 3 to 5

[0083] (Oil-Based Solid Cleansing Cosmetic)

[0084] An oil-based solid cleansing cosmetic of the formulation shown in table 2 was prepared according to the following production procedure. The obtained oil-based solid cleansing cosmetic was evaluated according to the methods described above as to makeup-removal property, washing-off property, refreshing feeling after washing, state of sedimentation of powder, and state of color separation. The evaluation results are shown in table 2.

[0085] (Production Procedure)

[0086] (1) Components 1 to 6 shown in Table 2 were heated to about 90° C. and mixed uniformly.

[0087] (2) Components 7 to 12 were added to the mixture prepared in the above (1), and then the resultant mixture was uniformly mixed at 90° C.

[0088] (3) The mixture prepared in the above (2) was filled in ajar container at 70° C. in a molten state, and then allowed to cool to obtain an oil-based solid cleansing cosmetic.

TABLE-US-00002 TABLE 2 Example Component (%) 3 4 5 1 Polyethylene (※1) 7.00 7.00 7.00 2 Caprylic/capric triglyceride Balance Balance Balance 3 Dicaprylyl carbonate 12.00 12.00 12.00 4 Purified water 0.50 0.50 0.50 5 PEG-20 glyceryl triisostearate 12.00 12.00 12.00 (HLB: 10.4) (※2) 6 PEG-5 glyceryl triisostearate 4.00 4.00 4.00 (HLB: 3) (※3) 7 Moroccan lava clay (※5) 3.00 2.00 8 Mixture of clay, kaolin 1.00 1.50 and mica (※9) 9 Mixture of clay, montmolilonite, 1.50 kaolin and mica (※10) 10 Silica (Specific surface area 1.00 1.00 1.00 200 m.sup.2/g) (※7) 11 Tocopherol 0.05 0.05 0.05 12 Phenoxyethanol 0.20 0.20 0.20 Evaluation Makeup-removal Property ⊚ ⊚ ⊚ Washing-off Property ⊚ ⊚ ⊚ Refreshing Feeling ⊚ ⊚ ⊚ After Washing State of Sedimentation ◯ ◯ ◯ of Powder State of Color Separation — ⊚ ⊚ *9 Product name: SPARCLAY SDR (TERRAMATER, Color tone: Dark red, Volume average particle size: 16 μm) *10 Product name: SPARCLAY SG (TERRAMATER, Color tone: Green, Volume average particle size: 7 μm)

[0089] As seen from the results shown in Table 2, the oil-based solid cleansing cosmetic of the present invention was excellent in properties required for a cleansing cosmetic such as makeup-removal property, washing-off property, and refreshing feeling after washing, and was also excellent in quality stability due to little powder sedimentation. Further, even when natural clays having a bright color tone were used in combination, an oil-based solid cleansing cosmetic having a high commercial value due to being free of color separation could be obtained (see Examples 4 to 5).

Example 6

[0090] (Stick-Like Oil-Based Solid Cleansing Cosmetic)

[0091] An oil-based solid cleansing cosmetic of the formulation shown in table 3 was prepared according to the following production procedure. The obtained oil-based solid cleansing cosmetic was evaluated according to the methods described above as to makeup-removal property, washing-off property, refreshing feeling after washing, state of sedimentation of powder, and state of color separation. The evaluation results are shown in table 3.

[0092] (Production Procedure)

[0093] (1) Components 1 to 6 shown in Table 3 were heated to about 90° C. and mixed uniformly.

[0094] (2) Components 7 to 10 were added to the mixture prepared in the above (1), and then the resultant mixture was uniformly mixed at 90° C.

[0095] (3) The mixture prepared in the above (2) was filled in a stick-like container at 70° C. in a molten state, and then allowed to cool to obtain a stick-like oil-based solid cleansing cosmetic.

TABLE-US-00003 TABLE 3 Component (%) Example 6 1 Polyethylene (※1) 12.00 2 Caprylic/capric triglyceride Balance 3 Dicaprylyl carbonate 12.00 4 Purified water 0.50 5 PEG-20 glyceryl triisostearate 14.00 (HLB: 10.4) (※2) 6 PEG-5 glyceryl triisostearate 6.00 (HLB: 3) (※3) 7 Medicinal carbon (※11) 0.50 8 Silica (Specific surface area 1.00 300 m.sup.2/g) (※12) 9 Tocopherol 0.05 10 Phenoxyethanol 0.20 Evaluation Makeup-removal Property ⊚ Washing-off Property ⊚ Refreshing Feeling After Washing ⊚ State of Sedimentation of Powder ◯ State of Color Separation — *11 Product name: MEDICINAL CARBON defined by Japanese pharmacopoeia (Color tone: Black, Volume average particle diameter: 39 μm) available from Nichi-Iko Pharmaceutical Co., Ltd. *12 Product name: AEROSIL 300 available from Nippon Aerosil Co., Ltd.)

[0096] As seen from the results shown in Table 3, the oil-based solid cleansing cosmetic of Example 6 was excellent in cleansing property, and even when black medicinal carbon having an excellent adsorption effect was used, a stick-like oil-based solid cleansing cosmetic having a uniform appearance could be obtained.

INDUSTRIAL APPLICABILITY

[0097] According to the present invention, an oil-based solid cosmetic suitable for a cleansing cosmetic which is excellent in cleansing property, washing-off property and refreshing feeling after washing, and is also excellent in quality stability such as appearance and uniformity of composition is provided.