liquid composition

Abstract

To provide a liquid composition excellent in re-dispersibility.SOLUTION: Provided is a liquid composition comprising (A) a powder, (B) a nonpolar silicone oil, (C) a silicone surfactant, (D) a lower alcohol, and (E) water.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a liquid composition such as a cosmetic, which contains powder and water and is used by shaking (redispersing) it at the time of use.

Background Art

[0002] Liquid preparations containing powder, which have an appearance in which the powder component settles and separates into layers when left standing, are widely used in cosmetics and the like. Such cosmetics can provide a smooth feeling due to the powder in addition to the feeling of use due to the components contained in the liquid phase.

[0003] Since such a liquid composition is used after redispersing the powder component uniformly by shaking, it is required that the redispersibility of the powder component is good. In liquid compositions containing powder, various studies have been made to improve the redispersibility of the powder component. For example, when silica is used as the powder, it has been studied to improve the dispersibility by combining a material that aids the dispersion of the powder. [[ID=1十七]]

[0004] As such a material for assisting dispersion, polar oil has been widely used. Although the type of oil and the application method have been studied, it has been difficult to obtain an improved redispersibility effect only by changing the polar oil to a non-polar oil. Particularly in a composition having a high alcohol content, it has been difficult to improve the redispersibility.

[0005] Also, as a material for assisting dispersion, the use of a surfactant, emulsion particles, etc. has been studied. For example, Patent Document 1 discloses a cosmetic composition in which silica is combined with a polyether-modified silicone having an HLB of 5 to 10 as a surfactant. However, according to the studies of the present inventors, a composition that can be redispersed more easily and more uniformly is desired. Furthermore, it is also desired to slow down the powder sedimentation rate when left standing in a dispersed state.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] International Publication No. 2011 / 111828 [Overview of the project]

[0007] The present invention aims to provide a liquid composition that exhibits excellent redispersibility and a slow powder sedimentation rate.

[0008] The present invention provides the following: [1] (A) powder, (B) Non-polar silicone oil, (C) Silicone-based surfactants, (D) Lower alcohols, and (E)Water A liquid composition comprising [a certain substance]. [2] The composition according to [1], wherein component (A) is silica. [3] The composition according to [1] or [2], wherein component (B) is selected from the group consisting of dimethylpolysiloxane, methylphenylpolysiloxane, caprylyl methicone, diphenylsiloxyphenyl trimethicone, methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. [4] The composition according to any one of [1] to [3], wherein the HLB of component (C) is 1.0 to 4.8. [5] The composition according to any one of [1] to [4], wherein component (C) is a polyether-modified silicone surfactant. [6] The cosmetic composition according to any one of [1] to [5], wherein component (D) is an alcohol having 1 to 4 carbon atoms. [7] A cosmetic composition according to any one of [1] to [6], wherein the content of component (B) is 0.05 to 10% by mass, based on the total mass of the cosmetic composition. [8] A cosmetic composition according to any one of [1] to [7], wherein the content of component (C) is 0.01 to 3% by mass, based on the total mass of the cosmetic composition. [9] (E) The composition according to any one of [1] to [8], further comprising a nonionic surfactant.

[10] The cosmetic composition according to [9], wherein the HLB of component (E) is 1.0 to 12.0.

[11] The composition according to any one of [1] to

[10] , wherein the viscosity is 1,000 mPa·s or less.

[0009] The liquid composition according to the present invention exhibits excellent redispersibility of powder components; the powder components can be easily and uniformly redispersed simply by shaking by hand, and the powder is less likely to settle after being dispersed. Specific description of the invention

[0010] The liquid composition according to the present invention (hereinafter sometimes simply referred to as "composition") has the property of separating into at least two layers, a powder layer and a liquid layer, when left standing. The liquid layer may be composed of one or more layers, and if the liquid layer consists of two or more layers, each layer may be in a clearly separated stacked state, or each layer may be in a mixed suspension state.

[0011] The composition according to the present invention is (A) Powder, (B) Non-polar silicone oil, (C) Silicone-based surfactants, (D) Lower alcohols, and (E)Water It consists of including.

[0012] The components contained in the two-layer cosmetic composition according to the present invention are described below.

[0013] (A) Powder

[0014] The powder (A) incorporated into the composition according to the present invention is not particularly limited as long as it is a powder that can be incorporated into cosmetics, etc. The shape and size of the powder in the powder cosmetic of the present invention are not particularly limited. It also includes both surface-treated and unsurface-treated powders.

[0015] Specific examples of powders include inorganic powders such as extender pigments (e.g., silica, talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, red mica, biotite, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, tungstate metal salts, magnesium, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluorapatite, hydroxyapatite, ceramic powder, and metal soaps (e.g., zinc myristate, palmitate). Calcium sulfate, aluminum stearate, boron nitride, zeolite, potassium aluminum sulfate (calcined alum), etc.); resin powder (e.g., polyamide resin powder (nylon powder), polyethylene powder, polyalkyl acrylate powder such as polymethyl methacrylate, polystyrene powder, styrene-acrylic acid copolymer resin powder, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose powder, crosslinked silicone powder, etc.); inorganic white pigment (e.g., titanium dioxide, zinc oxide, etc.); inorganic red pigment (e.g., iron oxide (red iron oxide), iron titanate, etc.); none Inorganic brown pigments (e.g., γ-iron oxide); inorganic yellow pigments (e.g., yellow iron oxide, yellow ochre); inorganic black pigments (e.g., black iron oxide, lower titanium oxide); inorganic purple pigments (e.g., manganese violet, cobalt violet); inorganic green pigments (e.g., chromium oxide, chromium hydroxide, cobalt titanate); inorganic blue pigments (e.g., ultramarine, Prussian blue); pearl pigments (e.g., titanium dioxide coated mica, titanium dioxide coated bismuth oxychloride, titanium dioxide coated talc, colored titanium dioxide coated mica, bismuth oxychloride, fish scale foil, etc.); Metal powder pigments (e.g., aluminum powder, copper powder, etc.); organic pigments such as zirconium, barium, or aluminum lake (e.g., Red 201, Red 202, Red 204, Red 205, Red 220, Red 226, Red 228, Red 405, Orange 203, Orange 204, Yellow 205, Yellow 401, and Blue 404, Red 3, Red 104, Red 106, Red 227, Red 230, Red 401, Red 505, Orange 205, Yellow 4, Yellow 5, Yellow 202, Yellow 203, Green 3, and Blue 1, etc.);Examples include natural pigments (e.g., chlorophyll, β-carotene, etc.). Among these, inorganic powders are preferred, and silica is particularly preferred.;

[0016] The content of the powder ((A) component) in the composition according to the present invention is usually 0.1 to 20% by mass, preferably 0.5 to 15% by mass, more preferably 1 to 10% by mass. When the content of the powder component is high, for example, 0.1% by mass or more, it is preferable because the smooth feeling when applied to the skin is improved. Also, when the content of the powder component is low, for example, 20% by mass or less, sufficient redispersibility can be obtained.

[0017] (B) Non-polar silicone oil, The non-polar silicone oil (B) incorporated into the composition according to the present invention is a silicone having a main skeleton of linear, branched, cyclic, or three-dimensional network polysiloxane and having no polar group. Therefore, as the non-polar silicone oil, the polysiloxane preferably has a hydrocarbon group such as an alkyl group or an aryl group or a halogen as a substituent other than hydrogen with respect to the main chain polysiloxane.

[0018] (B) The component can be arbitrarily selected from the non-polar silicone oils as described above. For example, those selected from the group consisting of dimethylpolysiloxane, methylphenylpolysiloxane, caprylyl methicone, diphenylsiloxy phenyl trimethicone, methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane are preferably used.

[0019] (B) The molecular weight of the component is not particularly limited, but generally those having a polymerization degree of 2000 or less are preferably used. Such non-polar silicone oil is in an oily form at room temperature.

[0020] (B) The content of the component is preferably 0.05 to 10% by mass, more preferably 0.1 to 5% by mass, based on the total mass of the composition in order to strongly express the effects according to the present invention.

[0021] (C) Silicone surfactant The (C) silicone surfactant incorporated in the composition according to the present invention has a polysiloxane skeleton in its structure and a hydrophilic group in its side chain. Such silicones include polyether-modified silicone, polyether-alkyl co-modified silicone, polyglycerin-modified silicone, and polyglycerin-alkyl co-modified silicone. Among these, polyether-modified silicone is more preferred.

[0022] Various such silicone surfactants are known. For example, PEG-10 dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, PEG-3 dimethicone, PEG-12 dimethicone, PEG-10 methyl ether dimethicone, PEG-11 methyl ether dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, dimethicone / (PEG-10 / 15)) copolymer, (PEG-15 / lauryl polydimethylsiloxyethyl dimethicone) copolymer, etc. can be mentioned.

[0023] This (C) component has a higher affinity for water than the (B) component. However, if the hydrophilicity is too high, the effect of improving the redispersibility of the composition tends to be small. Therefore, the HLB of the (C) component is preferably 1.0 to 4.8, and more preferably 1.5 to 4.5.

[0024] In order to strongly express the effects according to the present invention, the content of the (C) component is preferably 0.01 to 3% by mass, and more preferably 0.03 to 1% by mass, based on the total mass of the composition.

[0025] (D) Lower alcohol The (D) lower alcohol incorporated into the composition according to the present invention can be one commonly used in cosmetics and medical compositions. This (D) component is generally a lower alcohol having 1 to 6 carbon atoms, preferably 1 to 4 carbon atoms, and specific examples include ethanol, methanol, propanol, butanol, isopropanol, etc. Of these, ethanol is preferably used.

[0026] The lower alcohol content in the composition of the present invention is generally 10 to 70% by mass, preferably 30 to 60% by mass. The inclusion of lower alcohol in the composition allows it to volatilize upon application to the skin, providing a cooling sensation. In the present invention, the lower alcohol content is high, and therefore components (B) and (C) dissolve easily in the lower alcohol. However, excessive dissolution of components (B) and (C) can reduce the redispersibility improvement effect. For this reason, it is preferable to keep the content of components (B) and (C), their affinity for alcohol, and their HLB within specific ranges.

[0027] (E)Water The composition according to the present invention further contains water in addition to the above-mentioned components. As the water, water used in cosmetics, quasi-drugs, etc., can be used, for example, purified water, ion-exchanged water, tap water, etc.

[0028] (F) Nonionic surfactant The composition according to the present invention contains the above-mentioned components (A) to (E) as essential components, but other components may be added as needed. An example of such a component is (E), a nonionic surfactant. While using component (B) as an activator tends to increase the sedimentation rate of the powder, combining it with a nonionic surfactant makes it possible to adjust the sedimentation rate. However, the effect tends to change depending on the affinity and HLB of the nonionic surfactant for alcohol. Therefore, the HLB of component (E) is preferably 1.0 to 12.0, and more preferably 1.5 to 10.

[0029] Such nonionic surfactants can be selected from those used in cosmetics and medical compositions, but those having a polyalkylene oxide structure are preferably used. Examples of such nonionic surfactants having a polyalkylene oxide structure include polyoxyethylene monoalkyl ethers, polyoxypropylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene monoesters, polypropylene glycol monoesters, polybutylene glycol monoesters, polyoxyethylene fatty acid glyceryl, mono fatty acid polyoxyethylene glyceryl, tri fatty acid polyoxyethylene glyceryl, polyoxyethylene hydrogenated castor oil, and polyoxyethylene alkyl ethers.

[0030] (G) Other ingredients In addition to components (A) to (E), the cosmetic composition according to the present invention may contain other components besides component (F), as long as they do not impair the effects of the present invention. Examples of other components include preservatives (e.g., sodium benzoate, ethylparaben, butylparaben, chlorphenesin, phenoxyethanol, etc.), antioxidants (e.g., tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters, etc.), fragrances, cooling agents, moisturizers, water-soluble polymers, thickeners, film-forming agents, UV absorbers, chelating agents, polyhydric alcohols, sugars, amino acids, organic amines, polymer emulsions, pH adjusters, skin nutrients, vitamins, etc. It is also possible to combine oils other than component (B) and surfactants other than component (C), but if used, it is preferable to use them within a range that does not impair the effects of the present invention.

[0031] Generally, in compositions containing powders, higher viscosity tends to improve the dispersion stability of the powder, while lower viscosity tends to improve redispersibility. From this viewpoint, the viscosity of the composition is preferably 1,000 mPa·s or less.

[0032] The composition according to the present invention contains a relatively high concentration of lower alcohols and is formulated with powder components that provide quick-drying properties and a smooth feel, making it suitable for use as an antiperspirant / deodorant cosmetic or a skincare cosmetic. For such applications, the composition should preferably be less irritating to the skin, and a pH of around 4.5 to 8 is preferable.

[0033] The composition according to the present invention is provided in a form contained in any container. For example, when the composition according to the present invention is used as a skincare cosmetic, it is preferable to contain it in a dispenser container, bottle container, mist container, or roll-on container. The cosmetic according to the present invention contains powder, but because the powder component has excellent redispersibility, it does not clog the nozzles of dispenser containers or mist containers and can be applied uniformly. [Examples]

[0034] The present invention will be described below using various examples. However, the present invention is not limited in any way by these examples. Furthermore, unless otherwise specified, the content is expressed as mass % relative to the total amount.

[0035] The present invention will be specifically described based on the following examples, but the present invention is not limited to these examples. Unless otherwise specified, the content is expressed in mass percent.

[0036] [Example 1 and Comparative Examples 1-3] Compositions were prepared by blending each component to achieve the concentrations shown in Table 1. The properties of the obtained compositions were evaluated according to the following criteria.

[0037] [Redistribution Assessment 1 and 2] 100 mL of the composition was placed in a lidded container approximately 2 cm in diameter and 25 cm in height. The container containing the composition was inverted and mixed 10 times to completely disperse the powder in the composition, and then allowed to stand on a horizontal surface to allow the powder in the composition to settle. After standing, the container was shaken vigorously again by hand, and the number of times it took for the settled material at the bottom of the container to detach from the bottom surface (redispersibility evaluation 1) and the number of times it took for the powder in the container to completely disperse (redispersibility evaluation 2) were measured. A lower number of these measurements indicates better redispersibility.

[0038] [Table 1]

[0039] [Examples 2-10] Compositions were prepared by blending each component to the concentrations shown in Table 1. The properties of the obtained compositions were evaluated according to the following criteria. In addition to evaluating the redispersibility of these compositions, the settling volume was measured. The same evaluation was performed on the composition of Example 1.

[0040] [Settlement volume assessment] 100 mL of the composition was placed in a lidded container approximately 2 cm in diameter and 25 cm in height. This container had markings up to 100 mL. The container containing the composition was inverted and mixed 10 times to completely disperse the powder, and then left to stand on a level surface. After standing for 1 minute, 2 minutes, and 5 minutes, the height of the sediment layer in the container was measured, and the volume of the sediment (sedimentation volume) was measured. The values ​​were read from the values ​​indicated on the container. A larger value indicates a slower sedimentation rate and less sedimentation.

[0041] [Table 2]

[0042] From the above results, it can be seen that in powder-containing compositions with a high alcohol content, when the oil component is a non-polar silicone oil, the redispersibility is improved compared to compositions using other oil components. Furthermore, it can be seen that combining it with a silicone-based surfactant further improves the redispersibility and slows down the sedimentation rate.

Claims

1. (A) Powder, (B) Non-polar silicone oil, (C) Silicone-based surfactants, (D) Lower alcohols, and (E) Water A liquid composition comprising, (A) The component is silica, (B) Component is selected from the group consisting of dimethylpolysiloxane, methylphenylpolysiloxane, caprylyl methicone, diphenylsiloxyphenyl trimethicone, methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane, and Based on the total mass of the aforementioned composition, (B) The content of component is 0.05 to 10% by mass. (D) The content of component is 30 to 60% by mass. A liquid composition for use in dispenser containers, bottle containers, mist containers, or roll-on containers.

2. The composition according to claim 1, wherein the HLB of component (C) is 1.0 to 4.

8.

3. The composition according to claim 1 or 2, wherein component (C) is a polyether-modified silicone surfactant.

4. The composition according to any one of claims 1 to 3, wherein component (D) is an alcohol having 1 to 4 carbon atoms.

5. The composition according to any one of claims 1 to 4, wherein the content of component (C) is 0.01 to 3% by mass, based on the total mass of the composition.

6. (F) The composition according to any one of claims 1 to 5, further comprising a nonionic surfactant.

7. The composition according to claim 6, wherein the HLB of component (F) is 1.0 to 12.

0.

8. The composition according to any one of claims 1 to 7, wherein the viscosity is 1,000 mPa·s or less.

9. A skincare cosmetic composition according to any one of claims 1 to 8.

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