Multilayer composition

Abstract

This invention provides a multilayer composition that can provide a smooth feel without containing powder, is non-sticky and refreshing due to containing almost no polymers or surfactants, and emulsifies easily with slight shaking. [Solution] A multilayer composition is provided comprising (A) one or more oils selected from oils with IOB = 0.11 to 0.43, (B) a polyglycerin fatty acid ester with HLB = 8.8 to 12.9, or a polyether-modified silicone with HLB = 5 to 14.5, (C) ethanol, and (D) water, characterized in that the amount of component (A) is 0.1 to 10% by mass, the amount of component (B) is 0.05 to 2% by mass, and the amount of component (C) is 40 to 75% by mass.

Description

Technical Field

[0001] The present invention relates to a multi-layer composition that can be easily emulsified with slight shaking.

Background Art

[0002] There are various types of cosmetics on the market.

[0003] Cosmetics can be divided into those mainly composed of aqueous components and those mainly composed of oil components. In addition, there are also those containing both aqueous and oil components, such as oil-in-water (O / W) and water-in-oil (W / O).

[0004] There are also so-called multi-layer cosmetics in which the cosmetics themselves are divided into layers.

[0005] The characteristic of multi-layer cosmetics is that when shaken in a container, the whole becomes a mixed and emulsified state. When using them, they are often applied in this emulsified state.

[0006] As a prior art document of such multi-layer cosmetics, for example, Patent Document 1 discloses a multi-layer cosmetic containing (A) a nonionic surfactant that is liquid at 25°C with an HLB of 2 to 9, (B) a polyhydric alcohol, (C) a branched hydrocarbon and / or a phenyl-modified silicone that is liquid at 25°C, (D) dimethylpolysiloxane and / or methyltrimethicone with a kinematic viscosity at 25°C of less than 20 mm 2 / s, and (E) an ester oil with an IOB value greater than 0 and less than or equal to 0.18, wherein the mass ratio of the total amount of oil agents to component (A) (total amount of oil agents / (A)) is 2000 or less, and the mass ratio of components (C), (D), and (E) is (C) / ((D)+(E))+(((D) / (E))-1)×0.02>0.25.

[0007] In addition, Patent Document 2 discloses a composition composed of a separated and transparent aqueous phase and an oily phase, at room temperature (20 - 25°C) and atmospheric pressure (760 mmHg or 1.013×10 5A composition is disclosed comprising a liquid at Pa, with an HLB of less than 8, and comprising at least one surfactant selected from sugar fatty acid esters and alkyl polyglucosides, at least one branched alkane containing 8 to 18 carbon atoms, preferably 12 to 16 carbon atoms, and 0 to 4% by mass of silicone oil relative to the total mass of the composition. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2019-119703 [Patent Document 2] Special Publication No. 2016-535047 [Overview of the project] [Problems that the invention aims to solve]

[0009] Incidentally, it is common practice to incorporate powders such as silica into cosmetics to give them a smooth, non-greasy feel. However, powders like silica are oil-absorbing and can lead to skin dryness, so there is a need for cosmetics that can provide a smooth, non-greasy feel without containing powders.

[0010] Furthermore, unlike single-layer cosmetics, multi-layer cosmetics not only have a superior (unique) appearance, but also have the advantage that when the container is shaken to homogenize the mixture before use, the appearance becomes cloudy, making it immediately clear that the mixture is sufficiently mixed.

[0011] Therefore, after investigating improvements to the formulation of multilayer compositions, it was found that by incorporating an oil whose IOB (Inorganic Organic Balance) value in the organic conceptual diagram is within a predetermined range, it is possible to impart a smooth, non-greasy feel when the composition is applied.

[0012] However, while emulsification with polymers or surfactants is common to incorporate a predetermined IOB oil into a water-based substrate, it was suspected that incorporating polymers or surfactants would result in increased stickiness of the composition.

[0013] Therefore, the present invention has been made in view of the above problems, and aims to provide a multilayer composition that can provide a smooth feel without containing powder, is non-sticky and refreshing to use because it contains almost no polymers or surfactants, and can be easily emulsified with slight shaking. [Means for solving the problem]

[0014] The present inventors conducted diligent research to solve the above problems and found that by blending one or more oils selected from oils with an IOB within a predetermined numerical range, a predetermined amount of polyglycerin fatty acid ester or polyether-modified silicone with an HLB within a predetermined numerical range, and further blending predetermined amounts of ethanol and water, it is possible to obtain a multilayer composition that provides a smooth feel without containing powder, is non-sticky and refreshing because it contains almost no polymers or surfactants, and easily emulsifies with slight shaking.

[0015] (1) One aspect of the present invention is, This is a multilayer composition characterized by containing the following components (A) to (D), wherein the amount of component (A) is 0.1 to 10% by mass, the amount of component (B) is 0.05 to 2% by mass, and the amount of component (C) is 40 to 75% by mass. (A) One or more oils selected from oils with IOB = 0.11 to 0.43 (B) Polyglycerol fatty acid ester with HLB = 8.8 to 12.9, or polyether-modified silicone with HLB = 5 to 14.5 (C) Ethanol (D)Water (2) In the embodiment of (1) above, component (A) may be a phenyl-modified silicone. (3) In the aspect of (1) above, the blending amount of component (A) may be 1 to 5% by mass. (4) In the aspect of (1) above, component (B) may be a polyether-modified silicone with HLB = 5. (5) In the aspect of (1) above, the blending amount of component (B) may be 0.05 to 0.2% by mass. (6) In the aspect of (1) above, the blending amount of component (C) may be 40 to 55% by mass.

Advantages of the Invention

[0016] According to the present invention, it is possible to impart a smooth feeling of use even without containing powder, and since it contains almost no polymers or surfactants, there is no stickiness, and it has a refreshing feeling of use, and it is possible to provide a multi-layer composition that can be easily emulsified with a slight shaking.

Modes for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described in detail.

[0018] <One or more oil agents selected from oil agents with (A) IOB = 0.11 to 0.43> The multi-layer composition of the present invention contains one or more oil agents selected from oil agents with (A) IOB = 0.11 to 0.43 in order to impart a smooth feeling when applied while forming multiple layers. (A) One or more oil agents selected from oil agents with IOB = 0.11 to 0.43 are not particularly limited as long as they are oil agents with IOB (inorganic value / organic value) of 0.11 to 0.43 in the compound. For example, phenyl-modified silicones such as diphenylsiloxyphenyltrimethicone (IOB = 0.25), diphenyldimethylsilicone (IOB = 0.25), phenyltrimethicone (IOB = 0.32), isodecyl neopentanoate (IOB = 0.22), isononyl isononanoate (IOB = 0.2), isopropyl myristate (IOB = 0.18), cetyl ethylhexanoate (IOB = 0.13), diethylhexyl succinate (IOB = 0.33), triethylhexanoin (IOB = 0.35), octyl palmitate (IOB = 0.13), esters of fatty acids and alcohols such as distearyl malate (IOB = 0.28), alkyl benzoate (C 12-15 )(IOB = 0.18), isostearic acid (IOB = 0.43), etc. are mentioned. As the compound used in the multilayer composition of the present invention, phenyl-modified silicone is particularly preferable among the above.

[0019] (A) As the blending amount of one or more oil agents selected from oil agents with IOB = 0.11 to 0.43, from the viewpoints of emulsifying property and feeling in use, it is 0.1 to 10% by mass, preferably 1 to 5% by mass, based on the total amount of the composition. When the blending amount is less than 0.1% by mass, a squeaking feeling will be felt when the multilayer composition is applied, and the feeling in use will deteriorate. When the blending amount exceeds 10% by mass, the oiliness of the multilayer composition increases, and it becomes too sticky when applied, and the feeling in use deteriorates. By setting the content of the oil agent to 0.1% by mass or more, a smooth feeling can be imparted when using a cosmetic based on this as a base, and by setting it to 10% by mass or less, the oiliness is appropriate and unpleasantness such as stickiness can be suppressed.

[0020] <(B) Polyglycerin fatty acid ester with HLB = 8.8 to 12.9, or polyether-modified silicone with HLB = 5 to 14.5> Furthermore, the multilayer composition of the present invention contains (B) a polyglycerin fatty acid ester with HLB = 8.8 to 12.9, or a polyether-modified silicone with HLB = 5 to 14.5, in order to emulsify easily with slight shaking and to prevent stickiness when applied. (B) Polyglycerin fatty acid esters with HLB = 8.8 to 12.9, or polyether-modified silicones with HLB = 5 to 14.5 are not particularly limited as long as the HLB is within the specified range. For example, polyglycerin fatty acid esters include polyglyceryl-4 oleate (HLB = 8.8), polyglyceryl-10 oleate (HLB = 12.9), and polyglyceryl-5 laurate (HLB = 10.9). Polyether-modified silicones include PEG-10 dimethicone (HLB = 5), PEG / PPG-20 / 22 butyl ether dimethicone (HLB = 7), PEG-11 methyl ether dimethicone (HLB = 14.5), and PEG-32 methyl ether dimethicone (HLB = 9.0). Among these, polyether-modified silicone with HLB=5 is preferred in terms of emulsifying properties and feel, and PEG-10 dimethicone (HLB=5) is particularly preferred. (B) Polyglycerin fatty acid esters with HLB=8.8 to 12.9, or polyether-modified silicones with HLB=5 to 14.5 may be used individually or in combination of two or more as appropriate.

[0021] (B) The amount of polyglycerin fatty acid ester with HLB = 8.8 to 12.9, or polyether-modified silicone with HLB = 5 to 14.5, is preferably 0.05 to 2% by mass, and more preferably 0.05 to 0.2% by mass, relative to the total amount of the composition, in terms of emulsification and usability. If the amount is less than 0.05% by mass, the multilayer composition will be difficult to emulsify. If the amount exceeds 0.8% by mass, the multilayer composition will become sticky and the usability will be poor. By setting the surfactant content to 0.05% by mass or more, interfacial tension is provided that allows for easy emulsification with slight shaking, and by setting it to 2% by mass or less, unpleasant sensations such as stickiness can be suppressed.

[0022] <(C) Ethanol> Furthermore, the multilayer composition of the present invention contains (C) ethanol to adjust the separation time into multiple layers and to provide a refreshing feel.

[0023] (C) The amount of ethanol to be added is preferably 40 to 75% by mass of the total composition, and more preferably 40 to 55% by mass, in terms of emulsifying properties and usability. If the amount is less than 40% by mass, the multilayer composition will not emulsify easily. If the amount exceeds 75% by mass, the multilayer will not form after addition. By setting the ethanol content to 40% by mass or more, it provides a smooth and refreshing feel, while setting it to 75% by mass or less can suppress unpleasant sensations such as stickiness.

[0024] <(D)Water> Furthermore, the multilayer composition of the present invention contains (D) water in order to form a multilayer.

[0025] (D) The amount of water to be added is not particularly limited, and the remaining amount after adding components (A) to (C) of the multilayer composition may be added, or the remaining amount after further adding the other components listed below may be added.

[0026] <(E) Other ingredients> The multilayer composition of the present invention may contain other components, as long as the stability of the multilayer structure and the emulsifying properties during shaking are maintained. Examples of such components include oils other than component (A), humectants, whitening agents, colorants, alcohols, amino acids, sugars, vitamins, viscosity modifiers, colorants, powders, UV absorbers, preservatives, antibacterial agents, antioxidants, fragrances, cosmetic ingredients, electrolytes, fibers, plant extracts, etc. The order in which these other components are added is not particularly limited, and they can be appropriately selected, for example, depending on their solubility.

[0027] The number of layers in the multilayer composition of the present invention is not particularly limited, but two layers are preferred. Furthermore, aesthetically, it is preferable that the upper and lower layers of the two layers are either transparent or slightly cloudy.

[0028] <Cosmetics> The multilayer composition of the present invention can be used as a cosmetic or topical skin preparation on its own, or by incorporating the multilayer composition into cosmetics or topical skin preparations to impart deodorant effects such as deodorizing and antiperspirant properties.

[0029] The form of such cosmetics and topical skin preparations is not particularly limited as long as multilayer stability and emulsification during shaking are maintained, but examples include lotion, gel, emulsion, cream, shampoo, and facial cleanser. In particular, from the viewpoint of taking advantage of the characteristics of the multilayer composition of the present invention, such as ease of emulsification during shaking, refreshing feeling upon application, and high multilayer stability during standing, formulation in a low viscosity lotion is preferred.

[0030] Furthermore, in addition to the multilayer composition described above, cosmetics and topical skin preparations may also contain other ingredients commonly used in cosmetics and topical skin preparations, to the extent that they do not impair the effects of the present invention. Examples of such ingredients include, but are not limited to, oils other than component (A), moisturizers, whitening agents, colorants, alcohols, amino acids, vitamins, viscosity modifiers, colorants, powders, UV absorbers, preservatives, antibacterial agents, antioxidants, fragrances, beauty ingredients, electrolytes, pH adjusters, fibers, water, plant extracts, etc. [Examples]

[0031] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Furthermore, the amounts of ingredients in the following examples are expressed in mass percent unless otherwise specified.

[0032] <Test 1: Examination of the amount of ingredient (A)> First, we conducted tests to investigate the amount of diphenylsiloxyphenyl trimethicone blended among one or more oils selected from (A) IOB = 0.11 to 0.43 in a multilayer composition. Multilayer compositions of Examples 1-5 and Comparative Examples 1-2 were prepared using the formulations listed in Table 1. The prepared multilayer compositions of Examples 1-5 and Comparative Examples 1-2 were then evaluated using the following method.

[0033] (Observation of the upper and lower layers after standing) The state of the upper and lower layers after standing was observed for the multilayer compositions of Examples 1-5 and Comparative Examples 1-2. After pouring 50 ml of the manufactured multilayer composition into a cylindrical container with a lid, measuring 33 mm in diameter and 65 mm in height, the state of the upper and lower layers of the multilayer composition was visually observed after two days. The evaluation was performed on a four-point scale as described below, and any special notes are noted along with the results. Transparent: The layer is completely transparent, and you can see through it very well. Slight turbidity: Fine particles are floating throughout the layer, but the other side is clearly visible. Semi-turbid: The layer is generally semi-transparent, making it difficult to see through to the other side. Milky white: The entire layer is milky white, and you cannot see through it.

[0034] (Evaluation of emulsifying properties) The emulsifying properties of the multilayer compositions of Examples 1-8 and Comparative Examples 1-7 were evaluated. After pouring 50 ml of the manufactured multilayer composition into a cylindrical container with a lid, measuring 33 mm in diameter and 65 mm in height, the container was shaken up and down. The container was then allowed to stand, and the emulsification properties (whether the emulsified particles (oil droplets) were visible to the naked eye) were visually observed and evaluated in two stages according to the following criteria. Generally, if the mixture was uniformly mixed after three up-and-down shakes, it was considered "easily emulsified" and observation proceeded. However, if uniformity was not achieved by then, the up-and-down shaking was repeated up to a maximum of 10 times. ○: Emulsified to a level where emulsified particles (oil droplets) are not visible to the naked eye. ×: The emulsification is limited to a level where emulsified particles (oil droplets) can be observed with the naked eye.

[0035] (Evaluation of usability) The usability (refreshing feeling, non-stickiness, etc.) of the multilayer compositions of Examples 1-5 and Comparative Examples 1-2 was evaluated. For each example of a multilayer composition, the "usability on the skin (refreshing feeling, non-stickiness, etc.)" was evaluated on a three-point scale according to the following criteria by directly applying the test sample to the skin. Compositions that did not emulsify even when shaken, or that did not form multiple layers after standing, were not evaluated. ○: Provides a refreshing feeling, without stickiness or stiffness, and is extremely easy to use. △: Although it feels slightly sticky, squeaky, and oily, it has a refreshing feel and is easy to use. ×: It doesn't leave a refreshing feeling after use, and it's sticky and sticky, making it poor to use.

[0036] The evaluation results described above, as well as the formulations of each example and comparative example, are shown in Table 1 below. [Table 1]

[0037] As is clear from the results in Table 1, when the amount of component (A) was less than 0.1% by mass, the composition did not easily form two layers, the degree of turbidity when shaken was poor, and the usability was not smooth. On the other hand, when the amount of component (A) exceeded 10% by mass, the composition did not easily emulsify even when shaken and remained as oil droplets, and the usability became oilier, resulting in an unpleasant feel. Furthermore, it was found that while emulsification is not a problem when the amount of component (A) is 0.1 to 10% by mass, 1 to 5% by mass is preferable from the viewpoint of usability. In addition, it was found that 2.5% by mass or more is more preferable from the viewpoint of turbidity (degree of cloudiness) of the lower layer after standing, and 5% by mass or less is more preferable from the viewpoint of turbidity of the upper layer. As a result, it was found that from the viewpoint of turbidity, an amount of component (A) of 2.5 to 5% by mass is more preferable.

[0038] <Test 2: Examination of specific compounds of component (A)> Next, tests were conducted to examine specific compounds of one or more oils selected from oils with (A) IOB = 0.11 to 0.43 in the multilayer composition. Multilayer compositions for Examples 6-16 and Comparative Examples 3-8 were prepared using the formulations listed in Table 2. The upper and lower layers of the multilayer compositions for Examples 6-16 and Comparative Examples 3-8 were then observed after standing, and their emulsifying properties and usability were evaluated, similar to Test 1. For the evaluation of emulsifying properties, the container was generally shaken three times, and if it was not uniform by then, it was shaken up to a maximum of 10 times.

[0039] The evaluation results described above, as well as the formulations of each example and comparative example, are shown in Table 2 below.

[0040] [Table 2]

[0041] As is clear from the results in Table 2, from the viewpoint of emulsification, mineral oil, dimethicone, dimethicone (high polymerization), cyclopentasiloxane, dimethiconol, and amodimethicone were found to be undesirable as component (A). On the other hand, from the viewpoint of usability, diphenylsiloxyphenyl trimethicone, isodecyl neopentanoate, isononyl isononanoate, isopropyl myristate, cetyl ethylhexanoate, diethylhexyl succinate, triethylhexanoin, octyl palmitate, and alkyl benzoate (C) were found to be undesirable as component (A). 12-15 It was found that ) is preferable. Furthermore, from the viewpoint of turbidity, it was found that diphenylsiloxyphenyl trimethicone, isodecyl neopentanoate, isononyl isononanoate, and isopropyl myristate are preferred as component (A).

[0042] <Test 3: Examination of the amount of ingredient (B)> Next, tests were conducted to examine the amount of PEG-10 dimethicone or polyglyceryl-10 oleate blended in multilayer compositions, specifically among polyglycerin fatty acid esters with an HLB of 8.8 to 12.9 or polyether-modified silicones with an HLB of 5 to 14.5. Multilayer compositions for Examples 17-30 and Comparative Examples 9-13 were prepared using the formulations listed in Table 3. The upper and lower layers of the multilayer compositions for Examples 17-30 and Comparative Examples 9-13 were then observed after standing, and their emulsifying properties and usability were evaluated, similar to Test 1. For the evaluation of emulsifying properties, the container was generally shaken three times, and if it was not uniform by then, it was shaken up to a maximum of 10 times.

[0043] The evaluation results described above, as well as the formulations of each example and comparative example, are shown in Table 3 below.

[0044] [Table 3]

[0045] As is clear from the results in Table 3, when the amount of component (B) is less than 0.01% by mass, the emulsification properties of the composition are poor and it does not disperse easily, while when the amount of component (B) exceeds 2% by mass, stickiness increases and usability deteriorates.

[0046] <Test 4: Examination of specific compounds of component (B)> Next, tests were conducted to examine specific compounds of polyglycerin fatty acid esters with an HLB of 8.8 to 12.9 or polyether-modified silicones with an HLB of 5 to 14.5 in multilayer compositions. Multilayer compositions for Examples 31-35 and Comparative Examples 14-17 were prepared using the formulations listed in Table 4. The upper and lower layers of the multilayer compositions for Examples 31-35 and Comparative Examples 14-17 were then observed after standing, and their emulsifying properties and usability were evaluated, similar to Test 1. For the evaluation of emulsifying properties, the container was generally shaken three times, and if it was not uniform by then, it was shaken up to a maximum of 10 times.

[0047] The evaluation results described above, as well as the formulations of each example and comparative example, are shown in Table 4 below.

[0048] [Table 4]

[0049] As is clear from the results in Table 4, from the viewpoint of emulsification, PEG-8 diisostearate, PEG-8 glyceryl isostearate, PEG-20 glyceryl isostearate, and polyglyceryl-2 oleate were found to be undesirable as component (B). On the other hand, from the viewpoint of usability, PEG-8 diisostearate, PEG-8 glyceryl isostearate, PEG-20 glyceryl isostearate, polyglyceryl-2 oleate, polyglyceryl-4 oleate, polyglyceryl-10 oleate, PEG-10 dimethicone, PEG / PPG-20 / 22 butyl ether dimethicone, and PEG-11 methyl ether dimethicone were found to be preferable as component (B). Furthermore, considering the above points, and also taking into account turbidity, it was found that PEG-10 dimethicone is preferred as component (B).

[0050] <Test 5: Examination of the amount of component (C)> Finally, we conducted tests to examine the amount of (C) ethanol used in the multilayer composition. Multilayer compositions for Examples 36-43 and Comparative Examples 18-19 were prepared using the formulations listed in Table 5. The upper and lower layers of the multilayer compositions for Examples 36-43 and Comparative Examples 18-19 were then observed after standing, and their emulsifying properties and usability were evaluated, similar to Test 1. For the evaluation of emulsifying properties, the container was generally shaken three times, and if it was not uniform by then, it was shaken up to a maximum of 10 times.

[0051] The evaluation results described above, as well as the formulations of each example and comparative example, are shown in Table 5 below.

[0052] [Table 5]

[0053] As is clear from the results in Table 5, when the amount of component (C) was less than 35% by mass, the emulsification properties of the composition were poor and it did not disperse easily, and when the amount was 85% by mass or more, the composition became a uniform layer and was no longer two layers. Furthermore, while a concentration of component (C) of 40-75% by mass is acceptable from the standpoint of emulsification, it has become clear that a concentration of 40-55% by mass is preferable when considering usability and turbidity.

[0054] Although preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the embodiments described above, and various modifications and changes are possible within the scope of the gist of the present invention as described in the claims.

Claims

1. A multilayer composition comprising the following components (A) to (D), characterized in that the amount of component (A) is 0.1 to 10% by mass, the amount of component (B) is 0.05 to 2% by mass, and the amount of component (C) is 40 to 75% by mass. (A) One or more oils selected from oils with IOB = 0.11 to 0.43 (B) Polyglycerol fatty acid ester with HLB = 8.8 to 12.9, or polyether-modified silicone with HLB = 5 to 14.5 (C) Ethanol (D) Water

2. The multilayer composition according to claim 1, characterized in that component (A) is a phenyl-modified silicone.

3. The multilayer composition according to claim 1, characterized in that the amount of component (A) is 1 to 5% by mass.

4. The multilayer composition according to claim 1, characterized in that component (B) is a polyether-modified silicone with HLB = 5.

5. The multilayer composition according to claim 1, characterized in that the amount of component (B) is 0.05 to 0.2% by mass.

6. The multilayer composition according to claim 1, characterized in that the amount of component (C) is 40 to 55% by mass.

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