Transparent liquid cosmetic

Abstract

To provide a transparent liquid cosmetic capable of imparting high moisture and a sensation of skin firmness without stickiness when applied to the skin, against the background that, conventionally, addition of a large quantity of polyhydric alcohol or water-soluble polymer to the transparent liquid cosmetic could result in stickiness, and development of a cosmetic giving moisture and firmness without stickiness has been difficult.SOLUTION: The present invention relates to a transparent liquid cosmetic containing (A) pullulan, (B) mannitol, and (C) methyl gluceth-20. The transparent liquid cosmetic imparts high moisture and a sensation of skin firmness without stickiness when applied to the skin.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a transparent liquid cosmetic that, when applied to the skin, does not feel sticky and imparts a high degree of moisturization and firmness to the skin.

Background Art

[0002] Transparent liquid cosmetics are cosmetics used for the purpose of providing a moisturizing effect by imparting moisture to the skin and smoothing the skin. In recent years, transparent liquid cosmetics that provide various skin care effects such as firmness of the skin as well as just a moisturizing effect have been developed. Since such transparent liquid cosmetics cannot contain a large amount of oil agents, water-soluble polymers and polyhydric alcohols have been incorporated to improve the moisturizing feeling. Also, water-soluble polymers are often used to impart firmness to the skin.

[0003] However, when a large amount of polyhydric alcohol is incorporated, stickiness may be felt, and stickiness may also be felt when water evaporates in the case of water-soluble polymers. Therefore, it has been difficult to develop a product that imparts a moisturizing feeling and firmness to the skin without stickiness.

[0004] Hitherto, as a transparent cosmetic having good persistence of the moisturizing effect after application, no stickiness or irritation, good skin affinity, and excellent usability, a transparent cosmetic containing a dicarboxylic acid, an oligomer ester composed of polyglycerin having an average degree of polymerization of 2 or more and 15 or less, ascorbic acid or a water-soluble derivative thereof, and a polyalkylene glycol having a number average molecular weight of 600 or more and 200,000 or less has been proposed (Patent Document 1). However, although the moisturizing effect and non-stickiness after application are good, the range of firmness of the skin is not covered. Also, as a cosmetic having a high moisturizing effect, no stickiness, and a feeling of firmness of the skin, an oil-in-water type emulsified cosmetic containing a water-soluble humectant, a liquid oil, an acrylic acid-based water-soluble polymer, a gum-based water-soluble polymer, and an emulsifier has been proposed (Patent Document 2). However, the range is not covered in the case of transparent liquid cosmetics.

Prior Art Documents

Patent Document

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] An object of the present invention is to provide a transparent liquid cosmetic that does not feel sticky when applied to the skin and imparts a high moisturizing feeling and a firm feeling of the skin.

Means for Solving the Problems

[0007] As a result of intensive research, the present invention has found that a transparent liquid cosmetic that does not feel sticky and imparts a moisturizing feeling and a firm feeling of the skin can be obtained by combining (A) pullulan, (B) mannitol, and (C) methyl gluceth-20, and has thus completed the present invention. That is, the present invention provides a transparent liquid cosmetic containing the following components (A) to (C) (A) Pullulan (B) Mannitol (C) Methyl gluceth-20 and characterized in that the content of (A) pullulan is 0.01 to 2% by weight.

[0008] Further, the present invention provides a transparent liquid cosmetic characterized in that the content of component (B) mannitol is 0.1 to 5% by weight.

[0009] Further, the present invention provides a transparent liquid cosmetic characterized in that the content of component (C) methyl gluceth-20 is 0.1 to 5% by weight.

Effects of the Invention

[0010] The transparent liquid cosmetic of the present invention is a transparent liquid cosmetic that does not feel sticky when applied to the skin and imparts a high degree of moisturization and firmness to the skin.

Best Mode for Carrying Out the Invention

[0011] The (A) pullulan used in the present invention is an α-glucan in which maltotriose, a trimer of glucose, is linearly bonded with a degree of polymerization of 100 to 5,000 and is a microbial water-soluble polymer. Commercially available products of pullulan can be used, and pullulan for cosmetics manufactured by Hayashibara Co., Ltd. can be used.

[0012] The content of the (A) pullulan used in the present invention is 0.01 to 2% by weight, more preferably 0.05 to 1% by weight, based on the transparent liquid cosmetic. If it is less than 0.01% by weight, the firmness of the skin after using the transparent liquid cosmetic may be impaired. On the other hand, if it exceeds 2% by weight, stickiness may be felt.

[0013] The (B) mannitol used in the present invention is a kind of sugar alcohol, and any one can be used as long as it is used in ordinary cosmetics. Commercially available products of mannitol can be used, and D-mannitol manufactured by Kao Corporation can be used.

[0014] The content of the (B) mannitol used in the present invention is not particularly limited, but it is preferably 0.1 to 5% by weight, more preferably 1 to 3% by weight, based on the transparent liquid cosmetic. If it is less than 0.1% by weight, stickiness may be felt and the firmness of the skin may be impaired. On the other hand, if it exceeds 5% by weight, the moisturization and firmness of the skin may be impaired.

[0015] The (C) methyl gluceth-20 used in the present invention is a kind of water-soluble humectant, and any one can be used as long as it is used in ordinary cosmetics. Commercially available products of methyl gluceth-20 can be used, and GLUCAM(TM)E-20 HUMECTANT manufactured by Nippon Lubrizol Corporation can be used.

[0016] The content of (C) methyl gluceth-20 used in the present invention is not particularly limited, but is preferably 0.1 to 5% by weight, more preferably 1 to 3% by weight, based on the transparent liquid cosmetic. If it is less than 0.1% by weight, the moist feeling and the firmness of the skin may be impaired. On the other hand, if it exceeds 5% by weight, stickiness may be felt and the firmness of the skin may be impaired.

[0017] In addition to the above essential components, the transparent liquid cosmetic of the present invention may contain, as components used in ordinary cosmetics, for example, nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, aqueous components, antioxidants, ultraviolet ray absorbers, powders, chelating agents, preservatives, colorants, beauty components, fragrances, pH adjusters, etc., within a range not impairing the effects of the present invention. The dosage form of the transparent liquid cosmetic of the present invention may be any of solubilized systems, dispersion systems, etc.

[0018] In the transparent liquid cosmetic of the present invention, "transparent" is defined as having a light transmittance of 90% or more at a wavelength of 600 nm in the visible region measured with a quartz cell having a thickness of 10 mm using a spectrophotometer UV-160A (manufactured by Shimadzu Corporation). However, here, the transmittance of water is defined as 100%.

[0019] In the transparent liquid cosmetic of the present invention, "liquid" is defined as being fluid in an environment of 25°C and atmospheric pressure.

Examples

[0020] The present invention will be described in detail below with reference to examples, but the technical scope of the present invention is not limited thereto. Unless otherwise specified, all contents are expressed in % by weight.

[0021] Transparent liquid cosmetics having the compositions listed in Tables 1 to 3 below were prepared, and 20 female professional panelists evaluated the stickiness, moist feeling, and firmness of the skin immediately after using each cosmetic, and the results are shown in Tables 1 to 3.

[0022] (Preparation method) Components 1 and 2 were uniformly dispersed in Component 10, and Components 3 to 9 were mixed therein to obtain a transparent liquid cosmetic.

[0023] (Evaluation method) Regarding "stickiness", it was evaluated according to the following criteria. Twenty female professional panelists judged the stickiness after use in two levels of "sticky" and "not sticky", and evaluated according to the following criteria. ◎: 18 or more panelists evaluated it as not sticky. 〇: 14 to 17 panelists evaluated it as not sticky. △: 9 to 13 panelists evaluated it as not sticky. ×: Less than 8 panelists evaluated it as not sticky.

[0024] Regarding "moist feeling", it was evaluated according to the following criteria. Twenty female professional panelists judged the moist feeling after use in two levels of "present" and "absent", and evaluated according to the following criteria. ◎: 18 or more panelists evaluated it as having a moist feeling. 〇: 14 to 17 panelists evaluated it as having a moist feeling. △: 9 to 13 panelists evaluated it as having a moist feeling. ×: Less than 8 panelists evaluated it as having a moist feeling.

[0025] Regarding "firmness", it was evaluated according to the following criteria. Twenty female professional panelists judged the firmness after use in two levels of "present" and "absent", and evaluated according to the following criteria. ◎: 18 or more panelists evaluated it as having a firmness. 〇: 14 to 17 panelists evaluated it as having a firmness. △: 9 to 13 panelists evaluated it as having a firmness. ×: Less than 8 panelists evaluated it as having a firmness.

[0026]

Table 1

[0027] As shown in Examples 1 to 5 of Table 1, when pullulan was contained in the range of 0.01 to 2% by weight, satisfactory results were obtained in all items. Particularly satisfactory results were obtained when pullulan was contained at 0.05 to 1% by weight. On the other hand, as shown in Comparative Examples 1 and 2, when pullulan was not contained or when the content of pullulan was less than 0.01% by weight, satisfactory results were not obtained for the firmness of the skin after use. Also, as shown in Comparative Example 3, when the content of pullulan exceeded 2% by weight, satisfactory results were not obtained for the stickiness after use. Even when other polysaccharides were contained instead of pullulan as in Comparative Examples 4 to 6, satisfactory results were not obtained for the stickiness and the firmness of the skin after use.

[0028]

Table 2

[0029] As shown in Examples 6 to 12 of Table 2, satisfactory results were obtained for all items when mannitol was contained. When mannitol was contained in an amount of 0.1 to 5% by weight, particularly satisfactory results were obtained, and when it was contained in an amount of 1 to 3% by weight, even more satisfactory results were obtained. On the other hand, as shown in Comparative Example 7, when mannitol was not contained, satisfactory results were not obtained for the stickiness after use. Also, as shown in Comparative Examples 8 to 10, when other sugar alcohols were used instead of mannitol, satisfactory results were not obtained for the stickiness after use.

[0030]

Table 3

[0031] As shown in Examples 13 to 18 of Table 3, satisfactory results were obtained for all items when methyl gluceth-20 was contained. When it was contained in an amount of 0.1 to 5% by weight, particularly satisfactory results were obtained, and when it was contained in an amount of 1 to 3% by weight, even more satisfactory results were obtained. On the other hand, as shown in Comparative Example 11, when methyl gluceth-20 was not contained, satisfactory results were not obtained for the moist feeling after use. Also, as shown in Comparative Examples 12 to 14, when other water-soluble humectants other than methyl gluceth-20 were contained, satisfactory results were not obtained for the stickiness, moist feeling, etc. after use.

[0032] Next, other examples of the present invention are shown. In any case, a clear liquid cosmetic that can satisfy the stickiness, moist feeling, and firmness of the skin after use was obtained.

[0033] (Example 19: Clear Liquid Cosmetic) (Components) (wt%) (1) Purified water Remainder (2) Pullulan ※1 0.02 (3) Mannitol ※5 0.01 (4) Methylglucose-20 ※6 5.0 (5) Dipropylene glycol ※7 10.0 (6) pH adjuster appropriate amount (7) Ethanol ※9 5.0 (8) Preservative appropriate amount (9) Polysorbate-20 ※8 0.5 (10) Fragrance appropriate amount (11) Dipotassium glycyrrhizinate ※16 0.05 ※16: Dipotassium glycyrrhizinate (manufactured by Nippon Paper Industries Co., Ltd.) (Preparation method) 1. Disperse Components 2 and 3 in Component 1 to obtain Part A. 2. Mix Components 7 and 8 to obtain Part B. 3. Mix Components 9 and 10 to obtain Part C. 4. Add Part B, Part C, Components 4 to 6, and 11 to Part A to obtain a clear liquid cosmetic.

[0034] (Example 20: Clear liquid cosmetic) (Components) (wt%) (1) Purified water remainder (2) Pullulan ※1 0.1 (3) Mannitol ※5 1.0 (4) Methylglucose-20 ※6 1.0 (5) PEG / PPG / Polybutylene glycol-8 / 5 / 3 glycerin ※17 1.0 (6) Dipropylene glycol ※7 10.0 (7) pH adjuster appropriate amount (8) Ethanol ※9 5.0 (9) Preservative appropriate amount (10) Polysorbate-20 ※8 0.5 (11) PEG-30 phytosterol ※18 0.03 (12) Fragrance appropriate amount ※17: Wilbride S-75 (manufactured by NOF Corporation) ※18: NIKKOL BPS-30 (manufactured by Nikko Chemicals Co., Ltd.) (Preparation Method) 1. Components 2 and 3 were dispersed in Component 1 to obtain Part A. 2. The mixture of Components 8 and 9 was designated as Part B. 3. The mixture of Components 10 to 12 was designated as Part C. 4. Parts B, C, and Components 4 to 7 were added to Part A to obtain a transparent liquid cosmetic.

[0035] (Example 21: Transparent Liquid Cosmetic) (Components) (wt%) (1) Purified Water The remainder (2) Pullulan ※1 0.1 (3) Mannitol ※5 1.0 (4) Sodium Hyaluronate ※19 0.01 (5) Methyl Gluceth-20 ※6 1.0 (6) Polyethylene Glycol ※20 1.0 (7) Dipropylene Glycol ※7 10.0 (8) pH Adjusting Agent Appropriate amount (9) Ethanol ※9 5.0 (10) Preservative Appropriate amount (11) Sucrose Laurate ※21 0.5 (12) PEG-30 Phytosterol ※18 0.03 (13) Fragrance Appropriate amount ※19: Peams-HY (manufactured by Technoble Co., Ltd.) ※20: Polyethylene Glycol #1500 (manufactured by NOF Corporation) ※21: Surfhope SE COSME C-1216 (manufactured by Mitsubishi Chemical Corporation) (Preparation Method) 1. Components 2 to 4 were dispersed in Component 1 to obtain Part A. 2. Components 9 and 10 were mixed to obtain Part B. 3. The heated and mixed Components 11 and 12 were mixed with Component 13 to obtain Part C. 4. Parts B, C, and Components 5 to 8 were added to Part A to obtain a transparent liquid cosmetic.

Industrial Applicability

[0036] According to the present invention, it is possible to provide a transparent liquid cosmetic that does not feel sticky when applied to the skin and imparts a high moisturizing feeling and a firm feeling to the skin.

Claims

1. The following components (A) to (C): (A) Pullulan (B) Mannitol (C) Methylgluceth-20 A clear liquid cosmetic characterized by containing them, wherein the content of (A) is 0.01 to 2% by weight.

2. The clear liquid cosmetic according to Claim 1, wherein the content of component (B) mannitol is 0.1 to 5% by weight.

3. The clear liquid cosmetic according to Claim 1 or 2, wherein the content of component (C) methylgluceth-20 is 0.1 to 5% by weight.

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