Emulsifier composition and emulsifier composition

Abstract

The objective is to provide an emulsifier composition and an emulsifying composition that can easily prepare nanoemulsions with fine emulsion particles without going through heating and cooling processes, and without using high-energy equipment such as high-pressure homogenizers. [Solution] To solve the above problem, an emulsifier composition was prepared by combining (A) a polyglycerin fatty acid ester surfactant with an HLB value of 12 or more and 18 or less with (B) oleyl glyceryl ether or isostearyl glyceryl ether. Furthermore, an emulsifier composition with a particle size of less than 300 nm was obtained by mixing the oil phase containing the emulsifier composition with (G) an aqueous phase containing water.

Description

Technical Field

[0001] The present invention relates to an emulsifier composition for preparing a fine emulsion type emulsified composition and a fine emulsion type emulsified composition.

Background Art

[0002] Currently, clean beauty is popular in the global personal care market, and a natural concept containing plant-based ingredients is becoming preferred. Generally, "clean" means that products and services should consider the health of humans and the environment. This means that it is necessary to consume things while considering resources such as water and food, and the ecosystems of animals and plants. Furthermore, it means that not only should the constituent components of cosmetics be made as environmentally friendly as possible, but it is also necessary to reduce the environmental impact in the manufacturing process of cosmetics.

[0003] Various surfactants are used in cosmetics, but raw materials derived from petroleum tend to be avoided, and PEG-based surfactants having polyethylene glycol (PEG) as the hydrophilic part tend to be particularly avoided by consumers. Among consumers, phrases such as "PEG-free", which do not use PEG-based surfactants, are also spreading.

[0004] Consideration for the environment in the manufacturing process of cosmetics is positioned at the top of social contribution activities in the environment that consumers expect from cosmetics manufacturers (Non-Patent Document 1). As a method of dealing with this, a technique is disclosed in which only a part of the oil phase and the aqueous phase components are emulsified at 70°C or higher, and the obtained high-concentration O / W emulsified parts and the remaining low-temperature aqueous phase (main aqueous phase) are mixed (Patent Document 1). As shown in Patent Document 1, in the conventional emulsification method in the manufacturing process of cosmetics, heating up to around 70°C is performed for emulsification and then cooling is performed, resulting in a high environmental load. Therefore, an emulsification method that does not perform heating and cooling during emulsification is desirable from the perspective of environmental consideration. Furthermore, the use of high-energy manufacturing equipment, such as high-pressure homogenizers, in the production of cosmetics is undesirable from an environmental perspective. High-pressure homogenizers can achieve fine emulsification by applying strong shear force to the emulsion, but they consume a large amount of energy and generate heat during emulsification, requiring energy to cool the emulsion, thus having a high environmental impact.

[0005] Among oil-in-water emulsion compositions, nanoemulsions with fine emulsion particles have a transparent or translucent to slightly cloudy appearance, contributing to the appearance of a high-quality formulation. Furthermore, they combine the freshness of water-based formulations with the emollient properties of oil-based formulations, resulting in excellent usability, making them suitable for use as cosmetics. While methods using a high-pressure homogenizer have been disclosed for preparing nanoemulsions (Non-Patent Document 2 and Patent Document 2), this is undesirable from an environmental perspective. While there are nanoemulsification technologies using surfactants, such as the D-phase emulsification method (Patent Document 3) and the aqueous emulsification method (Patent Document 4), these require multi-stage and complex compounding processes, making them not convenient. Furthermore, these multi-stage and complex compounding processes lead to extended compounding times, which is undesirable from an environmental perspective. Furthermore, a method has been disclosed in which a nanoemulsion composition is prepared in advance and mixed with other components to obtain a cosmetic product (Patent Document 5). However, this method is undesirable from an environmental perspective because it uses petroleum-derived PEG-based surfactants, and it is not necessarily a desirable form because the need to prepare the nanoemulsion composition in advance reduces the freedom of formulation design. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] Journal of the Japan Society of Waste Management and Resource Recycling, Vol. 25, No. 3, pp. 186-193, 2014. [Non-Patent Document 2] J. Soc. Cosmet. Chem. Jpn. 44(3), 199-207 (2010) [Patent Documents]

[0007] [Patent Document 1] Patent No. 4709320 [Patent Document 2] Patent No. 5709304 [Patent Document 3] Patent No. 6386738 [Patent Document 4] Japanese Patent Publication No. 2008-195689 [Patent Document 5] Japanese Patent Publication No. 2018-076309 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The objective is to provide an emulsifier composition and an emulsifying composition that can easily prepare nanoemulsions with fine emulsion particles without going through heating and cooling processes, and without using high-energy equipment such as high-pressure homogenizers. [Means for solving the problem]

[0009] In light of these circumstances, the inventors diligently conducted research to obtain an emulsifier composition and an emulsifier composition that can easily prepare nanoemulsions with fine emulsion particles without going through heating and cooling processes, and without using high-energy devices such as high-pressure homogenizers. As a result, they prepared an emulsifier composition by combining (A) a polyglycerin fatty acid ester surfactant with an HLB value of 12 to 18 with (B) oleyl glyceryl ether or isostearyl glyceryl ether, and further mixed the oil phase containing the emulsifier composition with (G) an aqueous phase containing water to obtain an emulsifier composition with a particle size of less than 300 nm. [Effects of the Invention]

[0010] According to the present invention, while minimal heating may be required when a component that does not dissolve at room temperature is included, nanoemulsions with a particle size of less than 300 nm can be formulated without going through heating and cooling processes, and without requiring strong stirring power such as that of a high-pressure emulsifier. Therefore, the environmental impact can be reduced compared to conventional technologies. Furthermore, since a fine emulsion can be obtained through a simple formulation process of mixing an oil phase containing an emulsifier with an aqueous phase containing water, without requiring a multi-stage formulation process, it contributes to shortening the formulation time. [Modes for carrying out the invention]

[0011] The present invention will be described in detail below. The component (A) used in the present invention is a polyglycerin fatty acid ester surfactant having an HLB of 12 or more and 18 or less. While not particularly limited, it is preferable that the degree of esterification is 1 with respect to polyglycerin with a degree of polymerization of 3 to 10. The HLB value in the present invention is the measured HLB. The fatty acid constituting the polyglycerin fatty acid ester surfactant of component (A) of the present invention may be one or more selected from linear or branched saturated or unsaturated fatty acid residues having 6 to 18 carbon atoms. Specifically, examples include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, isostearic acid, and ricinoleic acid.

[0012] The polyglycerin fatty acid ester surfactant of the present invention, having an HLB of 12 or more and 18 or less, is not particularly limited, but more specifically, it includes polyglyceryl-3 monocaprylate, polyglyceryl-6 monolaurate, polyglyceryl-6 monomyristate, polyglyceryl-10 monolaurate, polyglyceryl-10 monomyristate, polyglyceryl-10 monostearate, polyglyceryl-10 monoisostearate, polyglyceryl-10 monooleate, etc., of which polyglyceryl-10 monolaurate and polyglyceryl-10 monomyristate are preferred.

[0013] The component (B) used in this invention refers to oleyl glyceryl ether (oleyl glyceryl) or isostearyl glyceryl ether (isostearyl glyceryl), and commercially available products can be used.

[0014] Examples of oily components of component (C) used in the present invention include hydrocarbons such as squalane and liquid paraffin, vegetable oils such as olive oil, macadamia nut oil, and jojoba oil, esters such as glyceryl tri-2-ethylhexanoate, caprylic / capric triglyceride, isopropyl myristate, cetyl 2-ethylhexanoate, isooctyl palmitate, and isopropyl isostearate, semi-solid oils such as petrolatum, shea butter, and amino acid derivatives, silicones such as methylpolysiloxane, phenylmethyl silicone, and cyclomethicone, and essential oils and / or fragrances such as orange oil, lemon oil, rosemary oil, rose oil, lavender oil, linalool, limonene, citronellol, and geraniol. The properties of component (C) used in the present invention are not particularly limited, and it is sufficient that it is uniformly mixed with other components when the emulsified composition of the present invention is prepared.

[0015] Examples of polyols for component (D) used in the present invention include glycerin, diglycerin, 1,3-butylene glycol, 1,3-propanediol, propylene glycol, dipropylene glycol, 1,2-pentanediol, 1,2-hexanediol, sorbitol, xylitol, and maltitol.

[0016] Component (E), an anionic surfactant used in the present invention, is not particularly limited, and examples thereof include fatty acid soaps, acyl lactates, alkyl sulfates, phosphate esters, acyl sarcosinates, acyl glutamates, acyl alaninates, acyl taurates, etc. Among them, acyl taurates are preferred. Examples of acyl taurates include caproyl methyl taurate, cocoyl methyl taurate, lauroyl methyl taurate, myristoyl methyl taurate, palmitoyl methyl taurate, stearoyl methyl taurate, oleoyl methyl taurate, etc. More preferably, they are cocoyl methyl taurate, lauroyl methyl taurate, myristoyl methyl taurate, and oleoyl methyl taurate.

[0017] Component (F) used in the present invention is one or more selected from isostearic acid, oleic acid, isostearyl alcohol, and oleyl alcohol.

[0018] The emulsified composition according to the present invention contains (G) water. That is, the emulsifier composition according to the present invention can contain water.

[0019] In addition to (A) a polyglycerol fatty acid ester surfactant with an HLB value of 12 or more and 18 or less, (B) oleyl glyceryl ether or isostearyl glyceryl ether, and (E) an anionic surfactant, the emulsifier composition and the emulsified composition according to the present invention can contain additional surfactants as long as the effects of the present invention are not impaired.

[0020] In the emulsifier composition and the emulsified composition of the present invention, various components generally used in cosmetics and external skin preparations can be formulated within a range that does not impair the effects of the present invention. For example, pH adjusters, neutralizers, antioxidants, preservatives, beauty components, moisturizers, viscosity adjusters, pigments, sequestering agents, etc. can be formulated.

[0021] The emulsifier composition of the present invention can be obtained by mixing components (A), (B), (C), (D), (E), and (F). If there are components that do not dissolve at room temperature during mixing, the mixture can be heated before mixing. In the emulsifier composition, the mass ratio of component (A) to component (B) is preferably 7:1 to 9:7.

[0022] The emulsifying composition of the present invention can be prepared by adding component (C) to the emulsifier composition of the present invention, further adding component (D) to the oil phase and / or aqueous phase, and then adding and mixing the aqueous phase containing component (G) while stirring the oil phase. This preparation process can be carried out at room temperature without heating and cooling processes. Furthermore, stirring during the mixing of the oil phase and aqueous phase does not require a powerful stirring force such as that of a high-pressure emulsifier, but can be carried out with a low stirring force such as that of a propeller mixer or paddle mixer. In the emulsified composition, it is preferable that the mass ratio of component (A) to component (B) is 7:1 to 9:7, and further, the mass ratio of component (A) + component (B) to component (C), and component (C) / (component (A) + component (B)) are 0.1 to 3. The amount of emulsifying composition in a cosmetic or topical preparation is not particularly limited, but 0.1 to 20.0% by mass is preferred. The emulsifying composition of the present invention is preferably formulated by incorporating the emulsifier composition of the present invention, in order to omit the heating and cooling processes and simplify the formulation process. However, it can also be formulated by mixing components (A) to (G) without using the emulsifier composition.

[0023] The emulsified composition of the present invention can be used as a cosmetic or topical preparation, and is not limited to, but includes, for example, skincare cosmetics such as lotions and serums, hair care products such as scalp lotions, and cosmetic products such as sheet packs and masks. [Examples]

[0024] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these. It is not fixed. Furthermore, the mass percentage shown below refers to the mass percentage relative to the entire composition. be.

[0025] (1) Preparation of emulsifier composition and emulsified composition Emulsifier compositions and emulsified compositions were prepared with the compositions shown in Tables 1 and 2. The emulsifier compositions were prepared by mixing all the components, heating and dissolving them if necessary, and then cooling. The emulsified compositions were prepared by gradually adding phase b while stirring phase a at room temperature. The prepared emulsified compositions were evaluated as follows. (2) Particle size measurement The prepared emulsified compositions were diluted to a desired concentration with purified water, and the particle size was measured using a Zetasizer Nano S (Malvern). Emulsified compositions that could not be prepared or separated immediately after preparation were not measured.

[0026] In Examples 1 to 10 shown in Table 1, nanoemulsions with a particle size of less than 300 nm were prepared. On the other hand, in Comparative Example 1, which used polyglyceryl-10 diisostearate (HLB 10.0) as component (A') instead of component (A), and Comparative Example 2, which used glyceryl monooleate as component (B') instead of component (B), were either unpreparable or the particle size of the emulsified composition was 300 nm or larger, and the desired nanoemulsion could not be obtained.

[0027] [Table 1]

[0028] [Table 2]

[0029] <Example 11> Emulsified composition (lotion) Phase a: Emulsifier composition described in Example 2, 10.0% by mass Methylpolysiloxane (6cs) 0.8 Cyclopentasiloxane 0.2 Cetyl 2-ethylhexanoate 1.0 Fragrance 0.05 Glycerin 5.0 Phase b: 1,3-Butylene glycol 3.0 Propylene glycol 5.0 Sorbitol (70% aqueous solution) 1.0 Appropriate amount of citric acid Sodium citrate (appropriate amount) Preservative (appropriate amount) Purified water remainder Total 100.0 (Preparation method) Phase a was prepared by gradually adding phase b while stirring at room temperature. (Emulsified particle size) 58.6nm

[0030] <Example 12> Emulsified composition (sheet mask solution) (Emulsifier composition) Polyglyceryl-10 monolaurate 34.0% (by mass) Sorbitan coconut oil fatty acid 6.0 Oleyl glyceryl ether 10.0 Isostearic acid 9.0 Isostearyl alcohol 1.0 Glyceryl caprylate 10.0 Squalane 20.0 Sodium lauroyl methyl taurate 4.0 Glycerin 6.0 Total 100.0 (Preparation method) Mix the components together and heat to dissolve at 80°C. Then, cool to room temperature to complete the preparation. (Emulsified composition) Phase a: The above emulsifier composition 5.0 (mass%) Jojoba oil 0.8 Macadamia nut oil 0.2 Squalane 2.0 Lavender oil 0.02 Glycerin 5.0 Phase b: 1,3-propanediol 8.0 Xanthan gum (2% aqueous solution) 5.0 Sodium hyaluronate (1% aqueous solution) 1.0 Sorbitol (70% aqueous solution) 1.0 Appropriate amount of citric acid Sodium citrate (appropriate amount) Preservative (appropriate amount) Purified water remainder Total 100.0 (Preparation method) Phase a was prepared by gradually adding phase b while stirring at room temperature. (Emulsified particle size) 119.0nm This liquid is used to soak a sheet mask, creating the sheet mask.

[0031] <Example 13> Emulsified composition (scalp lotion) (Emulsifier composition) Polyglyceryl-10 monolaurate 34.0% (by mass) Sorbitan coconut oil fatty acid 6.0 Oleyl glyceryl ether 10.0 Oleic acid 9.0 Oleyl alcohol 1.0 Tocopherol 0.05 Squalane 20.0 Sodium cocoyl methyl taurate 3.0 Glycerin 16.95 Total 100.0 (Preparation method) Mix the components together and heat to dissolve at 80°C. Then, cool to room temperature to complete the preparation. (Emulsified composition) Phase a: The above emulsifier composition 5.0 (mass%) Squalane 1.0 Glycerin 5.0 Phase b: 1,3-Butylene glycol 5.0 Ethanol 3.0 Xanthan gum (2% aqueous solution) 5.0 Dipotassium glycyrrhizinate 0.05 Appropriate amount of citric acid Sodium citrate (appropriate amount) Preservative (appropriate amount) Purified water remainder Total 100.0 (Preparation method) Phase a was prepared by gradually adding phase b while stirring at room temperature. (Emulsified particle size) 119.0nm

[0032] <Example 14> Emulsified composition (beauty serum) (Emulsifier composition) Polyglyceryl-10 monolaurate 30.0 (mass%) Oleyl glyceryl ether 10.0 Isostearic acid 5.0 Vaseline 5.0 Squalane 15.0 Sodium lauroyl methyl taurate 2.0 Glycerin 33.0 Total 100.0 (Preparation method) Mix the components together and heat to dissolve at 80°C. Then, cool to room temperature to complete the preparation. (Emulsified composition) Phase a: The above emulsifier composition 10.0 (mass%) Squalane 1.0 Caprylic / Capric Triglyceride 1.5 Glycerin 5.0 Phase b: 1,3-propanediol 8.0 Xanthan gum (2% aqueous solution) 10.0 Sodium hyaluronate (1% aqueous solution) 1.0 Sorbitol (70% aqueous solution) 1.0 Appropriate amount of citric acid Sodium citrate (appropriate amount) Preservative (appropriate amount) Purified water remainder Total 100.0 (Preparation method) Phase a was prepared by gradually adding phase b while stirring at room temperature. (Emulsification particle size) 253.4nm

[0033] <Example 15> Emulsified composition (beauty serum) (Emulsifier composition) Polyglyceryl-10 monolaurate 30.0 (mass%) Oleyl glyceryl ether 10.0 Isostearic acid 5.0 Vaseline 5.0 Squalane 15.0 Purified water 5.0 Sodium stearoylmethyltaurate 1.0 Glycerin 29.0 Total 100.0 (Preparation method) Mix the components together and heat to dissolve at 80°C. Then, cool to room temperature to complete the preparation. (Emulsified composition) Phase a: The above emulsifier composition 10.0 (mass%) Squalane 1.0 Caprylic / Capric Triglyceride 1.5 Glycerin 5.0 Phase b: 1,3-propanediol 8.0 Xanthan gum (2% aqueous solution) 10.0 Sodium hyaluronate (1% aqueous solution) 1.0 Sorbitol (70% aqueous solution) 1.0 Appropriate amount of citric acid Sodium citrate (appropriate amount) Preservative (appropriate amount) Purified water remainder Total 100.0 (Preparation method) Phase a was prepared by gradually adding phase b while stirring at room temperature. (Emulsified particle size) 274.9nm

[0034] <Example 16> Emulsified composition (wiping lotion) (Emulsifier composition) Polyglyceryl-10 monolaurate 30.0 (mass%) Oleyl glyceryl ether 10.0 Squalane 3.0 Glycerin 52.0 Sodium lauroyl methylalanine (30% aqueous solution) 5.0 Total 100.0 (Preparation method) Each component was mixed at room temperature. (Emulsified composition) Phase a: The above emulsifier composition 5.0 (mass%) Fragrance 0.05 1,2-Pentanediol 2.0 Phase b: 1,3-Butylene glycol 5.0 Ethanol 3.0 Appropriate amount of citric acid Sodium citrate (appropriate amount) Preservative (appropriate amount) Purified water remainder Total 100.0 (Preparation method) Phase a was prepared by gradually adding phase b while stirring at room temperature. (Emulsified particle size) 125.1nm [Industrial applicability]

[0035] The emulsifier composition of the present invention accelerates environmentally friendly formulation development by enabling the formulation of a fine emulsified composition with less energy than conventional techniques, that is, without heating and cooling processes, and without using high-energy equipment such as high-pressure homogenizers. Furthermore, since the present invention provides a simple microemulsification technology, it not only reduces the burden on formulation developers but also leads to improvements in production processes.

Claims

1. (A) Polyglycerin fatty acid ester surfactant with an HLB value of 12 or more and 18 or less (B) Oleyl glyceryl ether or isostearyl glyceryl ether An emulsifier composition containing as an essential component.

2. The emulsifier composition according to claim 1, further comprising component (C) an oily component and component (D) a polyol.

3. The emulsifier composition according to claim 1 or claim 2, wherein the mass ratio of component (A) to component (B) is 7:1 to 9:

7.

4. The emulsifier composition according to claim 1 or 2, further characterized by containing component (E) an anionic surfactant.

5. The emulsifier composition according to claim 3, further characterized by containing component (E) an anionic surfactant.

6. The emulsifier composition according to claim 1 or 2, further characterized by containing component (F). (F) One or more selected from isostearic acid, oleic acid, isostearyl alcohol, and oleyl alcohol.

7. The emulsifier composition according to claim 3, further characterized by containing component (F). (F) One or more selected from isostearic acid, oleic acid, isostearyl alcohol, and oleyl alcohol.

8. The emulsifier composition according to claim 4, further characterized by containing component (F). (F) One or more selected from isostearic acid, oleic acid, isostearyl alcohol, and oleyl alcohol.

9. An emulsion composition in the form of an oil-in-water emulsion, comprising the following components (A), (B), (C), (D), and (G) as essential components, wherein the oil droplet diameter in the emulsion composition is less than 300 nm. (A) Polyglycerin fatty acid ester surfactant with an HLB value of 12 or more and 18 or less (B) Oleyl glyceryl ether or isostearyl glyceryl ether (C) Oily component (D) Polyol (G) Water

10. The emulsified composition according to claim 9, wherein the mass ratio of component (A) to component (B) is 7:1 to 9:7, and the mass ratio of component (A) + component (B) to component (C), component (C) / ((component (A) + component (B))) is 0.1 to 3.

11. The emulsifying composition according to claim 9 or 10, further characterized by containing component (E) an anionic surfactant.

12. The emulsifying composition according to claim 9 or 10, further characterized by containing component (F). (F) One or more selected from isostearic acid, oleic acid, isostearyl alcohol, and oleyl alcohol.

13. The emulsifying composition according to claim 11, further characterized by containing component (F). (F) One or more selected from isostearic acid, oleic acid, isostearyl alcohol, and oleyl alcohol.

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