Oil-in-water type lip cosmetic

Abstract

To provide an oil-in-water lip cosmetic preparation which has excellent secondary adhesion prevention effect, while having excellent gloss and fresh texture.SOLUTION: An oil-in-water lip cosmetic preparation, which contains the components described below in specific amounts, exhibits excellent secondary adhesion prevention effect and excellent feeling of use. (A) A dimethylsilicone oil having a viscosity of 3000 CS or more. (B) A non-silicone surfactant having an HLB of 12 or more. (C) An aqueous thickening agent. (D) Water.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a lip cosmetic, and more particularly to an oil-in-water type lip cosmetic having an excellent secondary adhesion prevention effect and excellent durability of luster. [Background technology]

[0002] Conventionally, lip cosmetics have had the problem of secondary adhesion, in which the cosmetic is transferred to the lips when the lips come into contact with a cup or the like after application of the cosmetic, and lip cosmetics that are less likely to cause secondary adhesion, so-called secondary adhesion-resistant effects, have been developed. For example, Patent Document 1 discloses a solid cosmetic preparation that has transfer resistance and is formulated by combining a volatile oil with a silicone surfactant to well disperse the pigment. Patent Document 2 describes a lipstick composition that contains a non-volatile oil of a perfluoropolyether type that is incompatible with a volatile oil and has transfer resistance. However, this lipstick composition has a problem in that it takes some time for the secondary adhesion-free effect to appear after application. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 97 / 16157 [Patent Document 2] International Publication No. WO 96 / 40044 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made in view of the above-mentioned conventional techniques, and an object of the present invention is to provide an oil-in-water type lip cosmetic which has an excellent secondary adhesion reducing effect, and is excellent in gloss and freshness. [Means for solving the problem]

[0005] As a result of intensive research by the present inventors to solve this problem, they discovered that by combining a dimethylsilicone oil of a specific viscosity with a non-silicone surfactant, it is possible to obtain an oil-in-water type lip cosmetic that not only has a secondary adhesion-resistant effect but also has an excellent glossy feel, and thus completed the present invention.

[0006] That is, the oil-in-water lip cosmetic composition according to the present invention includes the following: (A) Dimethyl silicone oil with a viscosity of 3000CS or more (B) Non-silicone surfactants with HLB of 12 or higher (C) Water-based thickener (D)Water The composition is characterized in that the blending amounts of each of the above are (A) 20 to 40 mass %, (B) 1 to 4 mass %, (C) 0.01 to 5 mass %, and (D) 25 to 70 mass %. The surfactant contained is preferably one or more selected from the group consisting of polysorbate-based surfactants, polyoxyethylene alkyl ether-based surfactants, surfactants synthesized from a copolymer of ethylene oxide and propylene oxide and a higher alcohol, monoacylglycerol, and diacylglycerol. Furthermore, the oil-in-water lip cosmetic according to the present application may contain 0.01 to 1.5% by mass of an aqueous dye (E). Effect of the Invention

[0007] The oil-in-water lip cosmetic of the present invention is obtained by blending specific amounts of (A) dimethyl silicone oil having a viscosity of 3000 CS or more, (B) a non-silicone surfactant having an HLB of 12 or more, (C) an aqueous thickener, and (D) water, which exhibits a secondary adhesion-free effect immediately after application and provides an oil-in-water lip cosmetic with excellent gloss. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The lip cosmetic of the present invention is composed of (A) a dimethyl silicone oil having a viscosity of 3000 CS or more, (B) a non-silicone surfactant having an HLB of 12 or more, (C) an aqueous thickener, and (D) water. Each component will be described in detail below.

[0009] (A) Dimethyl silicone oil with a viscosity of 3000CS or more Component (A) is a dimethyl silicone oil with a viscosity of 3000 CS or more. Component (A) has low affinity with lips, so when applied to the lips it becomes the outermost phase, and when component (A) adheres to a cup or the like, the color does not adhere to the cup, providing the so-called "secondary adhesion-free effect." The viscosity of component (A) is preferably 3000 CS or more. In addition, a mixture of dimethyl silicone oils with different viscosities can be used as long as the final viscosity is 3000 CS or more. If the viscosity is less than 30,000 CS, it may be difficult to achieve a glossy finish. Specific examples of component (A) include dimethicone 5000CS, dimethicone 6000CS, dimethicone 10000CS, dimethicone 12500CS, dimethicone 30000CS, and dimethicone 50000CS. Commercially available products include KF-96A-5000cs, KF-96H-6000cs, KF-96H-10,000cs, KF-96H-12,500cs, KF-96H-30,000cs, and KF-96H-50,000cs (all manufactured by Shin-Etsu Chemical Co., Ltd.).

[0010] The blending amount of component (A) is preferably 20 to 35% by mass based on the total cosmetic. If the blending amount is less than 20% by mass, it will not separate upon application and will not exhibit the secondary adhesion prevention effect. If the blending amount exceeds 35% by mass, it may spread poorly and the feel in use may be poor.

[0011] (B) Non-silicone surfactants with HLB of 12 or higher The component (B) contains a non-silicone surfactant with an HLB of 12 or more. The surfactant has an HLB of 12 or more, so it dissolves in water and an oil-in-water composition is obtained. Furthermore, the reason for using a non-silicone surfactant is that when the aqueous dye (E) is mixed with the silicone oil (A), the secondary adhesion-free effect cannot be obtained. Examples of non-silicone surfactants with an HLB of 12 or more include ceteth-20, PEG-60 hydrogenated castor oil, beheneth-20, and PEG-20 glyceryl isostearate. Commercially available products include NIKKOL BC-20, NIKKOL HCO-60, NIKKOL BB-20 (all manufactured by Nikko Chemicals Co., Ltd.), EMALEX GWIS-120 (manufactured by Nippon Emulsion Co., Ltd.), etc. In particular, it is preferable to use one selected from polysorbate-based surfactants, polyoxyethylene alkyl ether-based surfactants, surfactants synthesized from a copolymer of ethylene oxide and propylene oxide and a higher alcohol, monoacylglycerol, and diacylglycerol. The component (B) blended in the lip cosmetic of the present invention may be one type or two or more types.

[0012] The blending amount of component (B) is preferably 1 to 4% by mass based on the total weight of the cosmetic preparation. If the blending amount is less than 1% by mass, the effect of preventing secondary adhesion may be reduced, whereas if the blending amount is more than 4% by mass, the effect of preventing secondary adhesion may be reduced.

[0013] (C) Water-based thickener In the present application, an aqueous thickener can be included as component (C). By incorporating an aqueous thickener, the composition becomes viscous, improving the feel when applied. In addition, the inclusion of component (C) is preferable in that it stabilizes the emulsion. Examples of component (C) include (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer, (acrylates / alkyl acrylate (C10-30)) crosspolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, etc. Among them, the aqueous thickener made of an acrylic acid-based polymer is preferable. An example of a commercially available product is SIMULGELNS (manufactured by SEPPIC SA).

[0014] When component (C) is blended, it is preferably 0.01 to 5% by mass based on the total amount of the lip cosmetic. If the blending amount is less than 0.01% by mass, it may not contribute to emulsion stability, and if the blending amount is more than 5% by mass, it may spread poorly and feel poor when used.

[0015] (D)Water The oil-in-water lip cosmetic according to the present invention contains water. The water is not particularly limited and may be ion-exchanged water, tap water, or the like. The amount of water (D) is preferably 25 to 70% by mass based on the total amount of the oil-in-water lip cosmetic. If the amount is less than 25% by mass, the smoothness during use may be impaired, and if it exceeds 70% by mass, the amounts of other ingredients may be relatively reduced and the effect may not be obtained.

[0016] (E) Water-based dye The oil-in-water lip cosmetic of the present invention may further contain an aqueous dye (E). The aqueous dye is used in the oil-in-water lip cosmetic of the present invention because the pigment penetrates into the lips and gives off a color, rather than being in the form of a cosmetic applied to the lips, resulting in a secondary adhesion-free effect. Examples of the (E) component include Acid Fuchsin, Yellow No. 4, Yellow 5, Blue 1, Red 227, Green 3, Red 401, Red 504, Orange 205, Yellow 203, Green 201, Purple 201, Purple 401, Black 401, Yellow 205, and the like. Commercially available products include UNICERT Yellow 08006-J (manufactured by Sensient Technologies Japan) and FD&C Green No.3 (manufactured by Sensient Technologies Japan).

[0017] When component (E) is blended, its blending amount is preferably 0.01 to 1.5% by mass relative to the total amount of the cosmetic. If it is less than 0.01% by mass, the effect of the aqueous dye is not obtained, and if it exceeds 1.5% by mass, the cosmetic may become difficult to remove.

[0018] In addition to the above-mentioned components, the oil-in-water lip cosmetic of the present invention can appropriately contain other oils, powders, polymeric compounds, moisturizers, fragrances, antioxidants, preservatives, beauty ingredients, etc. that are used in ordinary lip cosmetics, as long as the effects of the present invention are not impaired.

[0019] The oil-in-water lip cosmetic of the present invention can be used as a lip gloss, a lip base for foundation, an overcoat for lipstick, a lip balm, etc. In particular, it is preferably used as an overcoat.

[0020] The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto. The blend amounts are shown in mass % unless otherwise specified. The evaluations in the examples were carried out as follows.

[0021] (1) Appearance (Appearance evaluation method) The uniformity of the appearance of the samples after preparation was evaluated on a 5-point scale based on the following criteria. The average score was used to determine the evaluation criteria below. (Score) 3 points: uniform 2 points: Somewhat uneven 1 point: Uneven (Evaluation Criteria) A: Average score of 2.0 or above B: Average score between 1.5 and 2.0 points C: Average score below 1.5 points

[0022] (2) Secondary adhesion resistance (Method for evaluating secondary adhesion resistance) A practical usability test was conducted by a panel of 10 experts. The effect of preventing secondary adhesion when the sample was applied to the lips was evaluated on a 5-point scale based on the following criteria. The average score was used to judge the results according to the following criteria. (Score) 3 points: High secondary adhesion prevention effect 2 points: No secondary adhesion effect 1 point: No secondary adhesion effect (Evaluation Criteria) A: Average score of 2.0 or more B: Average score between 1.5 and 2.0 points C: Average score below 1.5 points

[0023] (3) Shine (Method of evaluating gloss) A practical usability test was conducted by a panel of 10 experts. The glossy feeling when the sample was applied to the lips was evaluated on a three-level scale based on the following criteria. The average score was used to judge the results according to the following criteria. (Score) 3 points: Moderate shine 2 points: Not enough shine 1 point: No shine (Evaluation Criteria) A: Average score of 2.0 or more B: Average score between 1.5 and 2.0 points C: Average score below 1.5 points

[0024] (4) Fit (How to evaluate fit) A practical usability test was conducted by a panel of 10 experts. The fit of the sample when applied to the lips was evaluated on a three-point scale based on the following criteria. The average score was used to evaluate the product according to the following criteria. (Score) 3 points: Feels like a proper fit 2 points: The fit is not good enough 1 point: Does not feel like a good fit (Evaluation Criteria) A: Average score of 2.0 or more B: Average score between 1.5 and 2.0 points C: Average score below 1.5 points

[0025] First, the inventors investigated the viscosity of (A) dimethyl silicone oil. The results are shown in Table 1.

[0026] [Table 1] TIFF0007672843000001.tif158166

[0027] As can be seen from Table 1, when the dimethyl silicone oil was 3000CS or more, oil-in-water lip cosmetics with good appearance and usability were obtained (Test Examples 1-1 and 1-2). However, when the dimethyl silicone oil was 100CS (Test Example 1-3), no gloss was obtained.

[0028] Next, the inventors investigated the amount and viscosity of the dimethyl silicone oil to be added. The results are shown in Table 2.

[0029] [Table 2] TIFF0007672843000002.tif179166

[0030] As can be seen from Table 2, when the dimethyl silicone oil was 5000cs, both the appearance and the feeling of use were good at 28% by mass to 40% by mass (Test Examples 1-1, 2-2, and 2-3). When the dimethyl silicone exceeded 50,000cs, a cosmetic composition with a uniform appearance, secondary adhesion prevention effect, and gloss was obtained, but the cosmetic composition became sticky after application and the feeling of use became poor (Test Example 2-6).

[0031] The inventors have investigated the types of aqueous thickeners that can be used. The results are shown in Table 3.

[0032] [Table 3] TIFF0007672843000003.tif155166

[0033] As can be seen from Table 3, the aqueous thickener containing an acrylic acid polymer provided a good appearance and feel when used (Test Example 1-1), whereas the aqueous thickeners other than an acrylic acid polymer provided a slightly inferior secondary adhesion-free effect (Test Example 3-1).

[0034] Furthermore, the inventors compared the oil-in-water type lip cosmetic compositions obtained when an aqueous dye (E) was added and when a coloring material was added. The results are shown in Table 4.

[0035] [Table 4] TIFF0007672843000004.tif148166

[0036] As can be seen from Table 4, when an oil-dispersible coloring material was added to the oil-in-water lip cosmetic according to the present invention, the appearance became non-uniform and the secondary adhesion prevention effect was not obtained (Test Example 4-1).

Claims

1. The oil-in-water type lip cosmetic is characterized in that it contains the following components (A) to (D): (A) Dimethyl silicone oil having a viscosity of 3,000 CS to 30,000 CS: 20 to 40% by mass (B) Non-silicone surfactant with HLB of 12 or more: 1 to 4% by mass (C) Water-based thickener 0.01 to 5% by mass (D) Water 25-70% by mass

2. The oil-in-water lip cosmetic according to claim 1, characterized in that the surfactant contained therein is one or more selected from the group consisting of polysorbate-based surfactants, polyoxyethylene alkyl ether-based surfactants, surfactants synthesized from a copolymer of ethylene oxide and propylene oxide and a higher alcohol, monoacylglycerol, and diacylglycerol.

3. 3. The oil-in-water lip cosmetic according to claim 1, further comprising an aqueous dye (E) in an amount of 0.01 to 1.5% by mass.

Images