Oil-in-water emulsion composition

Abstract

To provide an oil-in-water emulsion composition that is excellent in storage stability, has rich creamy touch in application, and has excellent firmness and flexibility of skin after application.SOLUTION: An oil-in-water emulsion composition contains the following components (A) to (D): (A) one or more kinds selected from polyoxyethylene phytosterol and / or polyoxyethylene phytostanol; (B) one or more kinds selected from hydrogenated rapeseed oil alcohol and / or behenyl alcohol; (C) (moringa oil / hydrogenated moringa oil) esters; and (D) hardened castor oil fatty acid ester, where the composition is excellent in storage stability, has rich and creamy touch in application, and has excellent firmness and flexibility of skin after application.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an oil-in-water type emulsion composition having good storage stability, a thick and rich feel with a texture when applied, and excellent firmness and flexibility of the skin after application.

Background Art

[0002] Oil-in-water type emulsified cosmetics typified by emulsions and creams are mainly used for replenishing moisture and oil to the skin and moisturizing the skin. However, for product differentiation and high added value, it is essential to have an attractive feel or skin texture during and after application. Although the preferred usage feelings vary among consumers, in recent years, a thick and rich feel that gives a luxurious feeling during application has been preferred. On the other hand, there are many consumers who expect firmness and flexible skin that gives a youthful impression after application.

[0003] As a technique for imparting a thick and rich feel during application, a technique of incorporating an acrylamide-based thickener and hydroxypropylmethylcellulose into an oil-in-water type emulsified cosmetic having a higher fatty acid, a higher alcohol, and a surfactant that are solid at normal temperature (Patent Document 1), a technique of containing dimethylpolysiloxane having a kinematic viscosity at 25°C of 30,000 to 100,000 mm 2 / s, a specific highly polar ester oil, a water-soluble acrylic polymer, and a nonionic surfactant (Patent Document 2), etc. have been proposed. However, higher fatty acids and higher alcohols, which are components of Patent Document 1, are excellent in texture during application, but a hard film may be formed on the skin after application, impairing the flexibility of the skin. The highly polar ester oil, which is a component of Patent Document 2, is insufficient in terms of firmness and flexibility of the skin after application, and stickiness also occurs when the content increases.

[0004] On the one hand, as a technology for imparting both firmness and flexibility to the skin after application, there are technologies that contain volatile hydrocarbons, higher alcohols that are liquid at 25°C, two types of oils having specific melting points, oleic acid-based nonionic surfactants with an HLB of 10 to 16, and water (Patent Document 3), technologies that contain phospholipids, liquid isoparaffin with a specific molecular weight, an oil that is liquid at 25°C, and water (Patent Document 4), oily components containing shea butter, polyhydric alcohols having two hydroxyl groups in the molecule, polyhydric alcohols having three or more hydroxyl groups in the molecule, phospholipids, carboxyvinyl polymer, one or more water-soluble polymers selected from xanthan gum, and water (Patent Document 5), technologies that contain N-acyl amino acids or their salts, phytosteryl oleate, and an oil having a water-holding capacity of 150% or more based on its own weight (Patent Document 6), etc. All of these technologies achieve both firmness and flexibility by effectively containing specific oils, but no consideration has been given to the rich and creamy feel during application.

[0005] In recent years, as a technology that has a rich and creamy feel during application and imparts firmness and flexibility to the skin after application, a technology that contains a nonionic surfactant, glycerin monoalkyl ether, (moringa oil / hydrogenated moringa oil) esters, and an oily component that is liquid at 25°C (Patent Document 7) has been proposed. The oil-in-water type emulsion composition using this technology can obtain excellent effects in terms of a rich and creamy feel, firmness of the skin, and flexibility of the skin. However, glycerin monoalkyl ether is essential to obtain high storage stability, which results in formulation limitations. Also, the (moringa oil / hydrogenated moringa oil) esters may precipitate over time, which may change the usability, and there was room for further consideration. In addition, there has been a demand for further technologies that can provide even higher effects in terms of a rich and creamy feel, firmness of the skin, and flexibility of the skin.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Patent Document 7

Summary of the Invention

Problems to be Solved by the Invention

[0007] An object of the present invention is to provide an oil-in-water type emulsion composition having good storage stability, a rich and thick feel when applied, and excellent firmness and flexibility of the skin after application.

Means for Solving the Problems

[0008] As a result of intensive studies on the above problems, the present inventor has found that an oil-in-water type emulsion composition containing one or more selected from polyoxyethylene phytosterol and / or polyoxyethylene phytostanol, one or more selected from hydrogenated rapeseed oil alcohol and / or behenyl alcohol, (moringa oil / hydrogenated moringa oil) esters, and hardened castor oil fatty acid esters can solve the above problems, and has completed the present invention.

[0009] That is, the present invention is (A) One or more selected from polyoxyethylene phytosterol and / or polyoxyethylene phytostanol (B) One or more selected from hydrogenated rapeseed oil alcohol and / or behenyl alcohol (C) (Moringa oil / hydrogenated moringa oil) esters (D) Hardened castor oil fatty acid ester It provides an oil-in-water type emulsion composition characterized by containing

[0010] Further, the present invention provides an oil-in-water type emulsion composition characterized in that component (D) is hydrogenated castor oil hydroxy stearate.

[0011] Further, the present invention provides an oil-in-water type emulsion composition characterized by containing component (E) macadamia nut oil polyglyceryl-6 esters behenate.

Advantages of the Invention

[0012] The oil-in-water type emulsion composition of the present invention has good storage stability, has a rich and thick feel with a kokoro when applied, and is an oil-in-water type emulsion composition excellent in the firmness and flexibility of the skin after application.

Best Mode for Carrying Out the Invention

[0013] Examples of the polyoxyethylene phytosterol and / or polyoxyethylene phytostanol of component (A) used in the present invention include polyoxyethylene (10) phytosterol, polyoxyethylene (30) phytosterol, polyoxyethylene (25) phytostanol, etc. One or more selected from these can be mixed and used. The numerical value in parentheses attached after polyoxyethylene indicates the average number of moles of oxyethylene chains added. Examples of commercially available products include NIKKOL BPS-10, NIKKOL BPS-30, and NIKKOL BPSH-25 (manufactured by Nikko Chemicals Co., Ltd.). Among these, polyoxyethylene (25) phytostanol is preferred.

[0014] The content of component (A) used in the present invention is not particularly limited, but is preferably 0.5 to 3% by weight in the emulsion composition. In this range, the storage stability is good, and a rich and thick feel with a kokoro is obtained when applied, and sufficient effects are obtained in the firmness and flexibility of the skin after application.

[0015] Examples of commercially available products of component (B) hydrogenated rapeseed oil alcohol and / or behenyl alcohol used in the present invention include Alcohol No. 20-B and behenyl alcohol (manufactured by Kao Alcohol Co., Ltd.). Among them, hydrogenated rapeseed oil alcohol is preferred. Hydrogenated rapeseed oil alcohol is an alcohol obtained by reducing rapeseed oil and mainly consists of stearyl alcohol, arachyl alcohol and behenyl alcohol.

[0016] The content of component (B) used in the present invention is not particularly limited, but is preferably 0.5 to 3% by weight in the emulsion composition. In this range, the storage stability is good, and it has a rich and thick feeling with a firmness during application, and sufficient effects can be obtained in terms of the firmness and flexibility of the skin after application.

[0017] The (moringa oil / hydrogenated moringa oil) esters of component (C) used in the present invention are esters in a solid state at 25°C obtained by transesterification of wasabi oil and hydrogenated moringa oil. Examples of commercially available products include FLORALIPIDS MORINGA BUTTER (manufactured by Cargill Incorporated).

[0018] The content of component (C) used in the present invention is not particularly limited, but is preferably 0.5 to 5% by weight in the emulsion composition. In this range, the storage stability is good, and it has a rich and thick feeling with a firmness during application, and sufficient effects can be obtained in terms of the firmness and flexibility of the skin after application.

[0019] Examples of the hardened castor oil fatty acid ester of component (D) used in the present invention include hydrogenated castor oil isostearate, hydrogenated castor oil stearate, hydrogenated castor oil triisostearate, hydrogenated castor oil hydroxystearate, and the like. One or more selected from these can be mixed and used. Examples of commercially available products include Castride MIS-P, Castride MS, Castride TIS-P, and Castride MH (manufactured by National Misumatsu Co., Ltd.). Among these, hydrogenated castor oil hydroxystearate is particularly preferable from the viewpoint of suppressing the precipitation of (moringa oil / hydrogenated moringa oil) esters over time.

[0020] The content of component (D) used in the present invention is not particularly limited, but is preferably 0.5 to 5% by weight in the emulsified composition. In this range, the storage stability is good, and it has a rich and thick feel with a kokumi during application, and sufficient effects can be obtained in terms of the firmness and flexibility of the skin after application.

[0021] The macadamia nut oil polyglyceryl-6 esters behenate of component (E) used in the present invention is an oily agent in paste form at 25°C obtained by esterifying an exchange product of macadamia nut oil and polyglycerin-6 (hexamer of glycerin) with behenic acid. An example of a commercially available product is S Face VL-211 (manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.).

[0022] The content of component (E) used in the present invention is not particularly limited, but is preferably 0.5 to 5% by weight in the emulsified composition. In this range, the storage stability is good, and it has a rich and thick feel with a kokumi during application, and sufficient effects can be obtained in terms of the firmness and flexibility of the skin after application.

[0023] The oil-in-water type emulsion composition of the present invention can further contain various components according to the purpose of use. For example, UV absorbers, preservatives, antioxidants, skin-whitening agents, vitamins, amino acids, hormones, peptides, physiologically active plant extracts, fluorescent materials, pigments, dyes, fragrances, scrub agents, binders, extenders, thickeners, saccharides, nutritional components, chelating agents, bactericides, horny layer improvers, keratolytic agents, antibiotics, skin penetration enhancers, blood circulation promoters, anti-inflammatory agents, cell activators, anti-inflammatory agents, analgesics, skin softeners, skin relaxants, wound healing agents, metabolism promoters, etc. can be contained within the range that does not impair the effects of the present invention.

[0024] The oil-in-water type emulsion composition of the present invention is applicable to skin lotions, milky lotions, creams, packs, etc. In addition, the form of the oil-in-water type emulsion composition of the present invention may be any of emulsion form, cream form, solid form, etc.

Examples

[0025] Hereinafter, the present invention will be described in more detail with reference to examples. The present invention is not limited by these examples. In addition, the content is shown in weight%.

[0026] Oil-in-water type emulsion compositions having the compositions listed in Tables 1 to 5 below were prepared, and the storage stability and usability were evaluated.

[0027] (Method for evaluating storage stability) The obtained oil-in-water type emulsion composition was filled into a plastic container and stored in a constant temperature bath at 40°C for 6 months. The states of the emulsion particles and precipitates were observed with a microscope and judged according to the following criteria. ◎: No difference is observed from the initial state. ○: The emulsion particles are slightly larger and / or a slight amount of precipitate is observed. ×: The emulsion particles are clearly larger and / or a clear amount of precipitate is observed.

[0028] (Method for evaluating usability) A usage test was conducted by a female-exclusive panel (20 people). Using the obtained oil-in-water type emulsified composition, evaluations were made according to the following criteria regarding the "rich and thick feel during application" and the "firmness of the skin" and "softness of the skin" after application. (1) Rich and thick feel ◎: 18 or more people were judged to feel a rich and thick feel. ○: 14 - 17 people were judged to feel a rich and thick feel. △: 9 - 13 people were judged to feel a rich and thick feel. ×: 8 or fewer people were judged to feel a rich and thick feel. (2) Firmness of the skin ◎: 18 or more people were judged to feel the firmness of the skin. ○: 14 - 17 people were judged to feel the firmness of the skin. △: 9 - 13 people were judged to feel the firmness of the skin. ×: 8 or fewer people were judged to feel the firmness of the skin. (3) Softness of the skin ◎: 18 or more people were judged to feel the softness of the skin. ○: 14 - 17 people were judged to feel the softness of the skin. △: 9 - 13 people were judged to feel the softness of the skin. ×: 8 or fewer people were judged to feel the softness of the skin.

[0029] (Manufacturing method in Table 1) Components 1 - 5 were mixed with a part of components 11 and 12 at 80°C (part a). Components 6 - 10 dissolved at 80°C were added to part a while stirring. Then, components 11 - 16 uniformly mixed were heated to 80°C and added, followed by emulsification. This was cooled to 30°C to obtain an oil-in-water type emulsified composition.

[0030]

Table 1

[0031] From the results in Table 1, Examples 1 to 5, which are the compositions of the present invention, obtained satisfactory results in all the evaluated items. In particular, the compositions (Examples 2 and 3) using polyoxyethylene (25) phytostanol as component (A) and having a content thereof of 0.5 to 3% by weight obtained remarkably excellent results in all the evaluated items. On the other hand, the compositions (Comparative Examples 1 and 2) containing polyoxyethylene (10) cetyl ether and polyoxyethylene (10) oleyl ether, respectively, instead of component (A) did not obtain satisfactory results.

[0032] (Manufacturing method of Table 2) At 80°C, Component 1 was mixed with a part of Components 10 and 11 (part a). Components 2 to 9 dissolved at 80°C were added to part a with stirring. Then, Components 10 to 15 uniformly mixed were heated to 80°C and added, followed by emulsification. This was cooled to 30°C to obtain an oil-in-water type emulsified composition.

[0033] [Table 2]

[0034] From the results in Table 2, Examples 6 to 9, which are the compositions of the present invention, obtained satisfactory results in all the evaluated items. In particular, the compositions (Examples 7 and 8) using hydrogenated rapeseed oil alcohol as component (B) and having a content thereof of 0.5 to 3% by weight obtained remarkably excellent results in all the evaluated items. On the other hand, the composition not containing component (B) (Comparative Example 3), and the compositions (Comparative Examples 4 and 5) containing stearyl alcohol and cetyl alcohol, respectively, instead of component (B) did not obtain satisfactory results.

[0035] (Manufacturing method of Table 3) At 80°C, Component 1 was mixed with a part of Components 11 and 12 (part a). Components 2 to 10 dissolved at 80°C were added to part a with stirring. Then, Components 11 to 15 uniformly mixed were heated to 80°C and added, followed by emulsification. This was cooled to 30°C to obtain an oil-in-water type emulsified composition.

[0036]

Table 3

[0037] From the results in Table 3, Examples 10 to 12, which are the compositions of the present invention, obtained satisfactory results in all the evaluated items. In particular, the compositions (Examples 11 and 12) in which the content of component (C) (moringa oil / hydrogenated moringa oil) esters is 0.5 to 5% by weight obtained remarkably excellent results in all the evaluated items. On the other hand, the composition without component (C) (Comparative Example 6), and the compositions containing shea butter, jojoba ester, and wasabi tree seed oil instead of component (C) (Comparative Examples 7 to 9) did not obtain satisfactory results.

[0038] (Manufacturing method of Table 4) Component 1 was mixed with a part of Components 12 and 13 at 80°C (part a). Components 2 to 11 dissolved at 80°C were added to part a with stirring. Then, Components 12 to 16 uniformly mixed were heated to 80°C and added, and emulsified. This was cooled to 30°C to obtain an oil-in-water type emulsion composition.

[0039]

Table 4

[0040] From the results in Table 4, Examples 13 to 17, which are the compositions of the present invention, obtained satisfactory results in all the evaluated items. In particular, the compositions (Examples 14 and 15) using hydrogenated castor oil hydroxy stearate as component (D) and having a content of 0.5 to 5% by weight obtained remarkably excellent results in all the evaluated items. On the other hand, the composition without component (D) (Comparative Example 10), and the compositions containing phytosteryl hydroxy stearate and phytosteryl macadamia nut fatty acid instead of component (D) (Comparative Examples 11 and 12) did not obtain satisfactory results.

[0041] (Manufacturing method of Table 5) Component 1 was mixed with a part of Components 9 and 10 at 80°C (part a). Components 2 to 8 dissolved at 80°C were added to part a while stirring. Components 9 to 13 uniformly mixed therewith were added after being heated to 80°C and emulsified. This was cooled to 30°C to obtain an oil-in-water type emulsified composition.

[0042]

Table 5

[0043] From the results in Table 5, Examples 18 to 22 which are the compositions of the present invention gave satisfactory results in all the evaluated items. In particular, compositions (Examples 18 to 20) in which the content of component (E) macadamia nut oil polyglyceryl-6 esters behenate is 0.5 to 5% by weight gave remarkably excellent results in all the evaluated items.

[0044] Other examples of the present invention are shown below.

[0045] (Example 23) (Component) (wt%) 1. Polyoxyethylene (25) phytostanol 1.5 2. Hydrogenated rapeseed oil alcohol 1.0 3. Behenyl alcohol 0.5 4. Ceramide NG 0.2 5. (Moringa oil / hydrogenated moringa oil) esters 3.0 6. Hydrogenated castor oil hydroxystearate 2.0 7. Macadamia nut oil polyglyceryl-6 esters behenate 3.0 8. Squalane 10.0 9. Trimethylolpropane triisostearate 10.0 10. Isotridecyl isononanoate 5.0 11. Beeswax 0.3 12. Coenzyme Q10 0.01 13. Purified water remainder 14. 1,3-Butylene glycol 12.0 15. Xanthan gum 0.1 16. Sodium hyaluronate 0.1 17. Carbomer 0.3 18. Phenoxyethanol 1.0 19. 2-Amino-2-methyl-1,3-propanediol 0.3 20. Fragrance 0.1 (Manufacturing method) At 80°C, Component 1 was mixed with a part of Components 13 and 14 (Part a). Components 2 to 12 dissolved at 80°C were added to Part a while stirring. Components 13 to 19 uniformly mixed were heated to 80°C and then added and emulsified. Thereafter, it was cooled while stirring, Component 20 was added at 70°C, and cooling was stopped at 30°C to obtain an oil-in-water type emulsified composition.

[0046] Example 23, which is the composition of the present invention, was excellent in storage stability and also obtained satisfactory results in all usage feeling evaluation items.

[0047] ※1: NIKKOL BPSH-25: Manufactured by Nikko Chemicals Co., Ltd. ※2: NIKKOL BPS-30: Manufactured by Nikko Chemicals Co., Ltd. ※3: NIKKOL BPS-10: Manufactured by Nikko Chemicals Co., Ltd. ※4: NIKKOL BC-10: Manufactured by Nikko Chemicals Co., Ltd. ※5: NIKKOL BO-10V: Manufactured by Nikko Chemicals Co., Ltd. ※6: Alcohol NO.20-B: Manufactured by Kao Alcohol Industries Co., Ltd. ※7: FLORALIPIDS MORINGA BUTTER: Manufactured by Cargill Incorporated ※8: Castride MH: Manufactured by National Mitsumatsu Co., Ltd. ※9: S Face VL-211: Manufactured by Sakamoto Pharmaceutical Co., Ltd. ※10: Behenyl alcohol: Manufactured by Kao Alcohol Industries Co., Ltd. ※11: Stearyl alcohol NX: Manufactured by Kao Alcohol Industries Co., Ltd. ※12: Cetyl alcohol NX: Manufactured by Kao Alcohol Industries Co., Ltd. ※13: Shea butter RF: Manufactured by Kao Alcohol Industries Co., Ltd. ※14: Floraesters 30: Manufactured by Cargill Incorporated ※15: FLORALIPIDS MORINGA OIL-REFINED: Manufactured by Cargill Incorporated ※16: Castride MIS-P: Manufactured by National Mison Corporation ※17: Castride MS: Manufactured by National Mison Corporation ※18: HS OIL OHP: Manufactured by National Mison Corporation ※19: Plandool-MAS: Manufactured by Nippon Seika Co., Ltd. ※20: S Face VL-212: Manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.

Industrial Applicability

[0048] According to the present invention, it is possible to provide an oil-in-water type emulsion composition having good storage stability, a rich and thick feel when applied, and excellent firmness and flexibility of the skin after application.

Claims

1. The following components (A) to (D) (A) One or more selected from polyoxyethylene phytosterol and / or polyoxyethylene phytostanol (B) One or more selected from hydrogenated rapeseed oil alcohol and / or behenyl alcohol (C) (Moringa oil / hydrogenated moringa oil) esters (D) Hydrogenated castor oil fatty acid ester An oil-in-water type emulsified composition characterized by containing the same.

2. The oil-in-water type emulsified composition according to Claim 1, wherein component (D) is hydrogenated castor oil hydroxystearate.

3. The oil-in-water type emulsified composition according to Claim 1 or 2, characterized by containing component (E) macadamia nut oil polyglyceryl-6 esters behenate.

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