Cosmetic composition and hair treatment method

Abstract

To provide a cosmetic composition which is an oil-in-water emulsion having excellent emulsion stability in which a large amount of a volatile silicone or a volatile hydrocarbon other than a cyclic silicone is blended and to provide a hair treatment method using the cosmetic composition.SOLUTION: There is provided a cosmetic composition which is an oil-in-water emulsion in which a higher alcohol, a cationic surfactant and water are blended and a volatile silicone other than a cyclic silicone and / or a volatile hydrocarbon are blended, wherein the blending amount of the volatile silicone other than a cyclic silicone and / or the volatile hydrocarbon is 15 mass% or more and further a polyether-modified silicone, a sorbitan fatty acid ester or a polyoxyethylene alkyl (12-14) ether are blended. The hair treatment method is a hair treatment method using the cosmetic composition.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cosmetic composition which is an oil-in-water emulsion containing a large amount of volatile silicones other than cyclic silicones and / or volatile hydrocarbons and having excellent emulsification stability, and to a hair treatment method using the cosmetic composition. [Background technology]

[0002] In hair cosmetics such as hair treatments, oil-in-water formulations are known, mainly composed of higher alcohols, cationic surfactants, and water. Depending on the required properties, components such as volatile cyclic silicones and various non-volatile silicones are added (e.g., Patent Document 1). Furthermore, oil-in-water cosmetic formulations are also known to contain components such as specific polyhydric alcohol-modified silicones, alkyl-modified carboxyvinyl polymers, and cyclic silicones (e.g., Patent Document 2). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2007-186464 [Patent Document 2] Japanese Patent Publication No. 2005-232088 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] Incidentally, cosmetics that are oil-in-water emulsions, such as so-called leave-on treatments that are applied to the hair and not rinsed out, have also been developed.

[0005] In cosmetics intended for use by being applied to the hair and then rinsed off, the amount of volatile oily components, such as volatile silicones, that can be included is relatively limited, as described in Patent Document 1, for example, that 0.1 to 10% by mass is preferable (paragraph

[0043] ). In contrast, in leave-in type cosmetics, the use of volatile oily components is particularly effective in improving the smoothness of the hair when applied, so it is desirable to include a relatively large amount, such as 15% by mass or more.

[0006] Furthermore, not limited to hair, there is a demand for oil-in-water cosmetics used on skin and other areas, such as those shown in Patent Document 2, to improve the feel of the oil-in-water cosmetic by incorporating a relatively large amount of volatile oily components, such as volatile silicones.

[0007] Currently, some cosmetics on the market use cyclic silicones such as cyclopentasiloxane as these volatile oily components. However, for reasons such as the existence of restrictions on the inclusion of cyclic silicones such as cyclopentasiloxane in cosmetics that are washed off with water after use in the EU, there has been a growing demand in recent years for the development of cosmetics with reduced amounts of cyclic silicones or even cosmetics that do not contain cyclic silicones at all.

[0008] While volatile silicones other than cyclic silicones and volatile hydrocarbons are considered promising alternatives to cyclic silicones, their specific gravity is lower than that of cyclic silicones such as cyclopentasiloxane. Therefore, adding large amounts of these to oil-in-water emulsions can impair emulsion stability, leading to separation of the oil and water phases or an increase in the size of oil droplets.

[0009] For these reasons, there is a need to develop technologies that enhance emulsion stability in cosmetic compositions, which are oil-in-water emulsions, while incorporating large amounts of volatile silicones other than cyclic silicones and volatile hydrocarbons.

[0010] The present invention has been made in view of the above circumstances, and its object is to provide a cosmetic composition that is an oil-in-water emulsion containing a large amount of volatile silicones other than cyclic silicones and / or volatile hydrocarbons, and having excellent emulsification stability. Another object of the present invention is to provide a hair treatment method using the cosmetic composition. [Means for solving the problem]

[0011] The cosmetic composition of the present invention is an oil-in-water emulsion comprising a higher alcohol, a cationic surfactant, and water, and is characterized by containing a volatile silicone other than a cyclic silicone and / or a volatile hydrocarbon, wherein the amount of the volatile silicone other than a cyclic silicone and / or volatile hydrocarbon is 15% by mass or more, and further comprising a polyether-modified silicone, a sorbitan fatty acid ester, or a polyoxyethylene alkyl (12-14) ether.

[0012] Furthermore, the hair treatment method of the present invention is characterized by using the cosmetic composition of the present invention. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a cosmetic composition that is an oil-in-water droplet type emulsion containing a large amount of volatile silicones other than cyclic silicones and / or volatile hydrocarbons, and having excellent emulsification stability. Furthermore, according to the present invention, it is possible to provide a hair treatment method using the cosmetic composition. [Modes for carrying out the invention]

[0014] The present invention will be described below based on an embodiment of the present invention (hereinafter referred to as "this embodiment").

[0015] <Cosmetic composition> The cosmetic composition of this embodiment is an oil-in-water emulsion containing a higher alcohol, a cationic surfactant, and water. The cosmetic composition of this embodiment can take the form of an oil-in-water emulsion by blending a higher alcohol, a cationic surfactant, and water. And the above cosmetic composition has a content of a volatile silicone other than a cyclic silicone and / or a volatile hydrocarbon of 15% by mass or more, and is blended with a polyether-modified silicone, a sorbitan fatty acid ester, or a polyoxyethylene alkyl (12-14) ether.

[0016] According to the cosmetic composition of this embodiment, due to the action of a polyether-modified silicone, a sorbitan fatty acid ester, or a polyoxyethylene alkyl (12-14) ether, even when the content of a volatile silicone other than a cyclic silicone and / or a volatile hydrocarbon is 15% by mass or more, it is possible to ensure excellent emulsion stability.

[0017] Also, as described later, the cosmetic composition of this embodiment is useful as an out-bath type hair cosmetic. However, since a large amount such as 15% by mass or more of a volatile silicone other than a cyclic silicone and / or a volatile hydrocarbon is blended, in such applications, it has excellent ease of combing when applied to the hair.

[0018] (Higher alcohol) The cosmetic composition of this embodiment contains one or more higher alcohols. As the higher alcohol, an alcohol having 12 to 22 carbon atoms can be used. For example, linear higher alcohols (e.g., myristyl alcohol, cetyl alcohol, oleyl alcohol, stearyl alcohol, behenyl alcohol, etc.), branched higher alcohols (e.g., hexyl decanol, isocetyl alcohol, isostearyl alcohol, octyldodecanol, etc.) can be mentioned. Note that, as the higher alcohol blended in the cosmetic composition of this embodiment, it is preferable to use a higher alcohol having 12 to 18 carbon atoms from the viewpoint of increasing the viscosity of the cosmetic composition.

[0019] The blending amount of the higher alcohol in the cosmetic composition of the present embodiment is not particularly limited as long as the cosmetic composition can take the form of an oil-in-water emulsion. For example, it is 1% by mass or more and 10% by mass or less. In addition, from the viewpoint of increasing the viscosity of the cosmetic composition, the lower limit value of the blending amount of the higher alcohol is preferably 2% by mass or more. Also, from the viewpoint of cost reduction, the upper limit value of the blending amount of the higher alcohol is preferably 6% by mass or less, and more preferably 4% by mass or less.

[0020] (Cationic surfactant) The cosmetic composition of the present embodiment contains one or more cationic surfactants. Examples of the cationic surfactant include quaternary ammonium salts having an alkyl group with 12 to 22 carbon atoms or tertiary amine salts having an alkyl group with 12 to 22 carbon atoms. Examples of the above salts include halogen salts and alkyl sulfates. The alkyl group may be linear or branched, and may be saturated or unsaturated.

[0021] Examples of the quaternary ammonium salt having an alkyl group with 12 to 22 carbon atoms include mono-long-chain alkyl type quaternary ammonium salts (for example, stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, behenyltrimethylammonium chloride, behenyltrimethylammonium methyl sulfate, etc.), di-long-chain alkyl type quaternary ammonium salts (for example, dicocoyldimethylammonium chloride, distearyldimethylammonium chloride, etc.), ethylene oxide (E.O.)-added type quaternary ammonium salts, etc. Examples of the tertiary amine salt having an alkyl group with 12 to 22 carbon atoms include fatty acid amidoamines (for example, dimethylaminopropylamide stearate, etc.), polyoxyethylene alkylamines (for example, polyoxyethylene oleylamine, etc.), polyoxyethylene fatty acid amides, etc.

[0022] Among the cationic surfactants exemplified above, it is preferable to use a quaternary ammonium salt having an alkyl group with 12 to 22 carbon atoms. Furthermore, when a tertiary amine salt having an alkyl group with 12 to 22 carbon atoms is used as the cationic surfactant in the cosmetic composition of this embodiment, it is even more preferable to use a quaternary ammonium salt having an alkyl group with 12 to 22 carbon atoms in combination, from the viewpoint of increasing the viscosity of the cosmetic composition.

[0023] The amount of cationic surfactant in the cosmetic composition of this embodiment is not particularly limited as long as the cosmetic composition can take the form of an oil-in-water emulsion, but for example, it is 0.5% by mass or more and 5% by mass or less. Furthermore, the lower limit of the amount of cationic surfactant is preferably 1% by mass or more, from the viewpoint of increasing the viscosity of the cosmetic composition. Also, the upper limit of the amount of cationic surfactant is preferably 2% by mass or less, from the viewpoint of reducing the risk of skin irritation.

[0024] (Volatile silicones other than cyclic silicones and / or volatile hydrocarbons) The cosmetic composition of this embodiment contains volatile silicones other than cyclic silicones and / or volatile hydrocarbons as volatile oily components.

[0025] In this specification, "volatile silicones other than cyclic silicones" refers to volatile silicones other than cyclic silicones with a kinematic viscosity of 5 mm at 25°C. 2 This refers to silicones with a viscosity of / s or less. The kinematic viscosity at 25°C mentioned above is the value measured at 25°C in accordance with the 2006 Standards for Quasi-Drug Raw Materials, General Test Methods, Viscosity Measurement Method 1. In addition, "cyclic silicone" in the context of volatile silicones other than the cyclic silicones mentioned above refers to volatile silicones that have a cyclic structure.

[0026] Examples of volatile silicones other than the aforementioned cyclic silicones include those with a kinematic viscosity of 5 mm at 25°C. 2 Linear siloxanes with a kinematic viscosity of 5 mmHg or less at 25°C (e.g., volatile dimethicone, disiloxane, trisiloxane, etc.)2 Alkyl methicones with a kinematic viscosity of 5 mmHg or less (e.g., ethyl methicone, caprylyl methicone, etc.) at 25°C. 2 Examples include branched siloxanes with a fission ratio of less than / s (for example, methyl trimethicone).

[0027] Furthermore, as used herein, "volatile hydrocarbons" refer to hydrocarbons with a boiling point of 270°C or lower and that are liquid at 25°C. "Liquid at 25°C" means that they exhibit fluidity at 25°C (the same applies hereafter).

[0028] Examples of the volatile hydrocarbons include branched volatile hydrocarbons (e.g., isododecane, light isoparaffin, light liquid isoparaffin, with a kinematic viscosity of 20 mm at 37.8°C). 2 Examples include hydrogenated polyisobutene and isohexadecane with viscosity values ​​of 0.5 / s or less, and linear volatile hydrocarbons (e.g., dodecane, C9-12 alkanes, C10-13 alkanes). The kinematic viscosity at 37.8°C was measured using a viscometer such as a Cannon-Fenske viscometer or an Ubbelohde viscometer, according to the method described in JIS Z8803.

[0029] The cosmetic composition of this embodiment may contain only one of the volatile silicones other than cyclic silicones and volatile hydrocarbons as volatile components, or it may contain two or more (therefore, the cosmetic composition may contain both volatile silicones other than cyclic silicones and volatile hydrocarbons).

[0030] The amount of volatile silicones other than cyclic silicones and / or volatile hydrocarbons in the cosmetic composition of this embodiment (if the cosmetic composition contains only one of the volatile silicones other than cyclic silicones and / or volatile hydrocarbons, this is the amount of either one; if both are contained, this is the total amount; the same applies hereinafter) is 15% by mass or more. Therefore, the cosmetic composition of this embodiment may contain 15% by mass or more of volatile silicones other than cyclic silicones, or 15% by mass or more of volatile hydrocarbons. When the amount of volatile silicones other than cyclic silicones and / or volatile hydrocarbons is 15% by mass or more in a cosmetic composition, a problem of unstable emulsion state may occur, but with the cosmetic composition of this embodiment, excellent emulsion stability can be ensured. Furthermore, when the cosmetic composition of this embodiment is used as an out-of-bath type hair treatment, the amount of volatile silicones other than cyclic silicones and / or volatile hydrocarbons as described above results in excellent smoothness when applied to the hair. From the viewpoint of achieving superior manageability when applied to such hair, it is preferable that the amount of volatile silicones and / or volatile hydrocarbons other than cyclic silicones in the cosmetic composition of this embodiment be 20% by mass or more.

[0031] The upper limit of the amount of volatile silicones and / or volatile hydrocarbons other than cyclic silicones in the cosmetic composition of this embodiment is, for example, 50% by mass or less. From the viewpoint of realizing an oil-in-water emulsion with better emulsification stability, the upper limit is preferably 30% by mass or less, and more preferably 40% by mass or less.

[0032] (Polyether-modified silicone, sorbitan fatty acid ester, polyoxyethylene alkyl (12-14) ether) The cosmetic composition of this embodiment contains a polyether-modified silicone, a sorbitan fatty acid ester, or a polyoxyethylene alkyl (12-14) ether. These additions enhance the emulsification stability of the cosmetic composition. The cosmetic composition of this embodiment may contain only one of the following: polyether-modified silicone, sorbitan fatty acid ester, and polyoxyethylene alkyl (12-14) ether, or it may contain two or more of these.

[0033] (Polyether-modified silicone) The polyether-modified silicone used in the cosmetic composition of this embodiment has polyether groups (e.g., ethylene oxide groups and / or propylene oxide groups) in the silicone molecule and does not contain amino groups. The cosmetic composition of this embodiment may contain one or more polyether-modified silicones.

[0034] Examples of the polyether-modified silicones include polyether-modified silicones having ethylene oxide groups in the silicone molecule, and polyether-modified silicones having both ethylene oxide groups and propylene oxide groups in the silicone molecule. Examples of the polyether-modified silicones include those represented by the following general formulas (1) to (5).

[0035] [ka]

[0036] In the general formula (1) above, v represents the average number of moles of ethylene oxide added, and is greater than 1 and less than or equal to 20. Also, w, x, y, and z are integers that depend on the molecular weight.

[0037] Examples of polyether-modified silicones represented by the above general formula (1) include PEG-9 polydimethylsiloxyethyl dimethicone.

[0038] [ka]

[0039] In the general formula (2) above, p, q, r, s, and t are integers that depend on the molecular weight. R represents a linear or branched alkyl group having 8 to 22 carbon atoms (the alkyl group may be saturated or unsaturated). Also, u represents the average number of moles of ethylene oxide added, and is greater than 1 and less than or equal to 20.

[0040] Examples of polyether-modified silicones represented by the above general formula (2) include lauryl PEG-9 polydimethylsiloxyethyl dimethicone.

[0041] [ka]

[0042] In the general formula (3) above, a and b are integers that depend on the molecular weight. Also, c represents the average number of moles of ethylene oxide added, and is greater than 1 and less than or equal to 20.

[0043] Examples of polyether-modified silicones represented by the above general formula (3) include PEG-3 dimethicone, PEG-9 dimethicone, PEG-10 dimethicone, and PEG-12 dimethicone.

[0044] [ka]

[0045] In the general formula (4) above, d and e are integers that depend on the molecular weight. f is greater than 1 and less than or equal to 5. Also, g represents the average number of moles of ethylene oxide added and is greater than 1 and less than or equal to 35.

[0046] Examples of polyether-modified silicones represented by the above general formula (4) include PEG-6 methyl ether dimethicone, PEG-11 methyl ether dimethicone, and PEG-32 methyl ether dimethicone.

[0047] [ka]

[0048] In the general formula (5) above, j, k, and l are integers that depend on the molecular weight. m represents the average number of moles of ethylene oxide added, and is greater than 1 and less than or equal to 25. n represents the average number of moles of propylene oxide added, and is greater than 1 and less than or equal to 30.

[0049] Examples of polyether-modified silicones represented by the above general formula (5) include PEG / PPG-20 / 22 butyl ether dimethicone, PEG / PPG-22 / 22 butyl ether dimethicone, PEG / PPG-23 / 23 butyl ether dimethicone, PEG / PPG-24 / 18 butyl ether dimethicone, and PEG / PPG-27 / 9 butyl ether dimethicone.

[0050] In addition to those represented by the general formulas (1) to (5) above, other polyether-modified silicones can also be used, such as copolymers of cetyl dimethicone and alkoxyl derivatives of dimethicone (e.g., cetyl PEG / PPG-10 / 1 dimethicone), copolymers of cetyl dimethicone and butyl ethers of alkoxyl derivatives of dimethicone (e.g., cetyl PEG / PPG-15 / 15 dimethicone butyl ether), and polyether-modified silicones in which some of the methyl groups of dimethicone are replaced with polyalkylene glycol (e.g., PEG / PPG-25 / 25 dimethicone).

[0051] The cosmetic composition of this embodiment can use, as the polyether-modified silicone, one or more selected from, for example, a polyether-modified silicone represented by any of the above general formulas (1) to (5), a copolymer of cetyl dimethicone and an alkoxyl derivative of dimethicone, a copolymer of cetyl dimethicone and a butyl ether of an alkoxyl derivative of dimethicone, and a polyether-modified silicone in which some of the methyl groups of dimethicone are substituted with polyalkylene glycol.

[0052] From the viewpoint of realizing an oil-in-water emulsion with superior emulsification stability, the cosmetic composition of this embodiment preferably contains at least one or more polyether-modified silicones selected from PEG-9 polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, PEG-3 dimethicone, and PEG-10 dimethicone.

[0053] Furthermore, the polyether-modified silicone is preferably one that is liquid at 25°C, from the viewpoint of improving handling when preparing the cosmetic composition of this embodiment.

[0054] The polyether-modified silicone used in the cosmetic composition of this embodiment has a kinematic viscosity of 50 mm at 25°C, for example. 2 / s or more 3000mm 2 A viscosity of 1 / s or less may be used. The kinematic viscosity at 25°C is the value measured at 25°C in accordance with the 2006 Standards for Quasi-drug Raw Materials, General Test Methods, Viscosity Measurement Method 1. In addition, as the polyether-modified silicone used in the cosmetic composition of this embodiment, from the viewpoint of realizing an oil-in-water emulsion with better emulsification stability, a kinematic viscosity of 150 mm² at 25°C is used. 2 A value of / s or higher is preferable.

[0055] As for the polyether-modified silicone used in the cosmetic composition of this embodiment, from the viewpoint of realizing an oil-in-water emulsion with superior emulsification stability, it is preferable that the HLB is 2 to 15, and more preferably that the HLB is 3 to 10. The HLB value of the above polyether-modified silicone is 1 / 5 of the mass percentage of ethylene oxide in the polyether-modified silicone.

[0056] (Sorbitan fatty acid ester) The sorbitan fatty acid ester used in the cosmetic composition of this embodiment is formed by ester bonding of sorbitan and a fatty acid. The cosmetic composition of this embodiment may contain one or more sorbitan fatty acid esters.

[0057] As the sorbitan fatty acid ester, one having an alkyl group with 12 to 22 carbon atoms can be used. Examples include sorbitan mono fatty acid esters (e.g., sorbitan monooleate, sorbitan coconut oil fatty acid, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monoisostearate, etc.), sorbitan sesqui fatty acid esters (e.g., sorbitan sesquioleate, sorbitan sesquistearate, sorbitan sesquiisostearate, etc.), and sorbitan tri fatty acid esters (e.g., sorbitan trioleate, sorbitan tristearate, etc.).

[0058] The sorbitan fatty acid ester used in the cosmetic composition of this embodiment has, for example, an HLB of 1 to 10. The HLB value of the above sorbitan fatty acid ester is calculated using Griffin's formula.

[0059] (Polyoxyethylene alkyl(12-14) ether) The polyoxyethylene alkyl (12-14) ether used in the cosmetic composition of this embodiment is obtained by addition polymerization of ethylene oxide to an alcohol having an alkyl group with 12 to 14 carbon atoms. The cosmetic composition of this embodiment may contain one or more polyoxyethylene alkyl (12-14) ethers.

[0060] Examples of the aforementioned polyoxyethylene alkyl (12-14) ethers include polyoxyethylene alkyl (12-14) ether (3E.O.) [cosmetic labeling name: (C12-14) Pareth-3], polyoxyethylene alkyl (12-14) ether (5E.O.) [cosmetic labeling name: (C12-14) Pareth-5], and polyoxyethylene alkyl (12-14) ether (7E.O.) [cosmetic labeling name: (C12-14) Pareth-7].

[0061] As the polyoxyethylene alkyl (12-14) ether, for example, one in which the average number of moles of ethylene oxide added is 2 or more and 11 or less can be used. Furthermore, as the polyoxyethylene alkyl (12-14) ether, from the viewpoint of realizing an oil-in-water droplet type emulsion with superior emulsification stability, one in which the average number of moles of ethylene oxide added is 10 or less is preferred, and one in which the average number of moles of ethylene oxide added is 8 or less is more preferred.

[0062] The polyoxyethylene alkyl (12-14) ether used in the cosmetic composition of this embodiment has, for example, an HLB of 6 to 14. The HLB value of the above polyoxyethylene alkyl (12-14) ether refers to the value calculated using Griffin's formula.

[0063] The amounts of polyether-modified silicone, sorbitan fatty acid ester, and polyoxyethylene alkyl (12-14) ether in the cosmetic composition of this embodiment (if only one of these is included in the cosmetic composition, this is the amount of that one; if two or more are included, this is the total amount of those ingredients; the same applies hereinafter) are, for example, 0.01% by mass or more and 3% by mass or less.

[0064] In the cosmetic composition of this embodiment, the lower limit of the amounts of polyether-modified silicone, sorbitan fatty acid ester, and polyoxyethylene alkyl (12-14) ether is preferably 0.01% by mass or more, and more preferably 0.05% by mass or more, from the viewpoint of realizing an oil-in-water emulsion with superior emulsification stability. Furthermore, if the amounts of polyether-modified silicone, sorbitan fatty acid ester, and polyoxyethylene alkyl (12-14) ether in the cosmetic composition of this embodiment are too high, the viscosity of the cosmetic composition tends to decrease. Therefore, for example, from the viewpoint of making the dosage form of the cosmetic composition of this embodiment a more suitable cream, the upper limit of the amounts of polyether-modified silicone, sorbitan fatty acid ester, and polyoxyethylene alkyl (12-14) ether in the cosmetic composition is preferably 1% by mass or less, and more preferably 0.3% by mass or less.

[0065] In the cosmetic composition of this embodiment, the mass ratio of the amount of volatile silicones other than cyclic silicones and / or volatile hydrocarbons in the cosmetic composition to the amount of polyether-modified silicone, sorbitan fatty acid ester, and polyoxyethylene alkyl (12-14) ether in the cosmetic composition ((amount of volatile silicones other than cyclic silicones and / or volatile hydrocarbons) / (amount of polyether-modified silicone, sorbitan fatty acid ester, and polyoxyethylene alkyl (12-14) ether)) is not particularly limited and may be set as appropriate. From the perspective of further increasing the viscosity of the cosmetic composition, the upper limit value of the above mass ratio is preferably 300 or less, more preferably 200 or less. Also, from the perspective of enabling an oil-in-water emulsion with more excellent emulsion stability to be realized, the lower limit value of the above mass ratio is preferably 50 or more, more preferably 70 or more.

[0066] (Water) The cosmetic composition of this embodiment is an oil-in-water emulsion, and water is formulated. The amount of water to be formulated may be appropriately set so that the cosmetic composition becomes an oil-in-water emulsion, but usually it is 50% by mass or more and 80% by mass or less.

[0067] (Optional component) The cosmetic composition of this embodiment may be one in which optional components other than the above-described components (higher alcohol, cationic surfactant, water, volatile silicone other than cyclic silicone, volatile hydrocarbon, polyether-modified silicone, sorbitan fatty acid ester, and polyoxyethylene alkyl (12 - 14) ether) are formulated. As the optional component, components that can be formulated in the cosmetic composition can be used. For example, nonionic surfactant, anionic surfactant, amphoteric surfactant, lower alcohol, polyhydric alcohol, saccharides, fats and oils (including vegetable oils), ester oils, hydrocarbons, waxes, fatty acids, non-volatile silicone, phospholipids, polymer compounds, proteins, amino acids, animal and plant extracts, microbe-derived substances, inorganic compounds, fragrances, preservatives, antioxidants, sequestering agents, ultraviolet absorbers, pigments, reducing agents, oxidizing agents, vitamins, dyes, pigments, acids, alkalis, etc. can be mentioned.

[0068] (Non-volatile silicone) The cosmetic composition of this embodiment may be one in which one or more non-volatile silicones are formulated. Examples of the non-volatile silicone include dimethyl silicone (for example, the kinematic viscosity at 25°C is 5 mm 2Dimethylpolysiloxane exceeding 650 / s, highly polymerized methylpolysiloxane (degree of polymerization of 650 or more), amino-modified silicones (e.g., aminoethylaminopropylsiloxane-dimethylsiloxane copolymer, aminoethylaminopropylmethylsiloxane-dimethylsiloxane copolymer, cocamidopropyldimethylammoniumhydroxypropyloxypropylsiloxane-methylpolysiloxane copolymer acetate, etc.), amino-polyether-modified silicones (e.g., (bisisobutylPEG-14 / amodimethicone) copolymer, etc.), aminophenyl-modified silicones (e.g., aminopropylphenyl trimethicone, etc.), phenyl-modified silicones (e.g., methyl Examples of non-volatile silicones include (e.g., phenylpolysiloxane, phenylpropyldimethylsiloxysilicate), silanol group-containing silicones (e.g., dimethiconol, highly polymerized dimethiconol, dimethylsiloxane-silanol highly polymerized methylpolysiloxane), long-chain alkyl-modified silicones (e.g., cetyl dimethicone, stearoxymethylpolysiloxane), and three-dimensional crosslinked silicones (e.g., (vinyl dimethicone / lauryl dimethicone) crosspolymer, (lauryl polydimethylsiloxyethyl dimethicone / bisvinyl dimethicone) crosspolymer, (dimethicone / vinyl dimethicone) crosspolymer, (dimethicone / phenylvinyl dimethicone) crosspolymer, etc.). The amount of the non-volatile silicone blended in the cosmetic composition of this embodiment is, for example, 1% by mass or more and 20% by mass or less.

[0069] (Cyclic silicone) The cosmetic composition of this embodiment may or may not contain one or more cyclic silicones selected from cyclotetrasiloxane, cyclopentasiloxane, and cyclohexasiloxane. If the cosmetic composition of this embodiment contains one or more cyclic silicones selected from cyclotetrasiloxane, cyclopentasiloxane, and cyclohexasiloxane, the amount of such silicones (if only one of cyclotetrasiloxane, cyclopentasiloxane, and cyclohexasiloxane is included as the cyclic silicone, this is the amount of that silicone; if two or more of the above cyclic silicones are included, this is the total amount of those silicones; the same applies hereinafter) is, for example, 0.1% by mass or less. The amount of one or more cyclic silicones selected from cyclotetrasiloxane, cyclopentasiloxane, and cyclohexasiloxane may be 0.05% by mass or less.

[0070] (Dosage form) The cosmetic composition of this embodiment can be in the form of an emulsion, cream, gel, or other dosage form. However, a cream-type dosage form is preferred because its appropriate viscosity makes it easier to apply to the target object.

[0071] (viscosity) When the cosmetic composition of this embodiment is in a cream form, which is a preferred dosage form, its viscosity is, for example, 1,000 mPa·s to 18,000 mPa·s. Furthermore, as will be described later, the cosmetic composition of this embodiment is preferably applied to an out-of-bath type hair treatment, and considering its application to such uses, its viscosity is preferably 3,000 mPa·s to 8,000 mPa·s. The viscosity of the cosmetic composition of this embodiment is the value after 60 seconds, measured using a B-type viscometer with a rotor selected according to the viscosity, under conditions of 25°C and 12 rpm.

[0072] (pH) The cosmetic composition of this embodiment has, for example, a pH of 3 to 9.

[0073] (Application) There are no particular restrictions on the use of the cosmetic composition of this embodiment, and it can be applied to various cosmetic compositions that are oil-in-water emulsions.

[0074] The cosmetic composition of this embodiment can be used, for example, for hair. Examples of hair applications include hair care applications (e.g., hair treatments, styling and hair treatments, components of multi-component hair treatments, hair treatments for pre-perming, hair treatments for post-perming, hair treatments for pre-coloring, hair treatments for post-coloring, hair treatments for pre-bleaching, hair treatments for post-bleaching, etc.) and hair styling applications. The hair treatment may be a leave-in hair treatment or a rinse-off hair treatment. Because the cosmetic composition of this embodiment has excellent smoothness when applied to hair, it can be preferably used as an out-of-bath type hair treatment that is used without rinsing after application to the hair.

[0075] Furthermore, the cosmetic composition of this embodiment can be used not only for hair as described above, but also for the scalp and other skin. Examples of products for the scalp include scalp rinses, scalp conditioners, scalp treatments (e.g., leave-in scalp treatments, rinse-off scalp treatments, and components of multi-component scalp treatments), scalp packs, scalp masks, and scalp lotions.

[0076] (Preparation method) There are no particular restrictions on the method for preparing the cosmetic composition of this embodiment; it can be prepared using the necessary components and conventionally known methods for preparing oil-in-water emulsions.

[0077] (How to use) The cosmetic composition of this embodiment can be used, for example, by taking an appropriate amount in your hand and applying it to the target area (such as wet or dry hair, a wet scalp, or skin other than the scalp).

[0078] (Target hair) The hair to which the cosmetic composition of this embodiment can be used is not particularly limited and may include hair that has a history of perming, coloring, or bleaching, or hair that has not undergone any of these treatments.

[0079] <Hair Treatment Methods> The hair treatment method of this embodiment is a method of treating hair using the cosmetic composition of this embodiment described above. Aside from using the cosmetic composition of this embodiment described above, the hair treatment method of this embodiment can employ any known hair treatment method using a cosmetic composition. [Examples]

[0080] The present invention will be described in detail below based on the examples. However, the following examples are not intended to limit the present invention. In Tables 1 to 4 below, the amount of each component is shown in percentage so that it equals 100% of the entire cosmetic composition. All percentages are by mass, and in these tables, the percentage notation is omitted, and only the numerical value representing the amount is shown. In Tables 1 to 4, the notation "-" indicates that the component is not included.

[0081] (Examples 1-14, Reference Example 1, Comparative Examples 1-3) The cosmetic compositions of Examples 1-14, Reference Example 1, and Comparative Examples 1-3 were prepared by mixing the components to obtain the compositions shown in Tables 1-3. In addition, in the cosmetic compositions of Examples 1-14, Reference Example 1, and Comparative Examples 1-3, the volatile dimethicone (volatile silicone other than cyclic silicone) had a kinematic viscosity of 1.5 mm at 25°C. 2 Dimethyl silicone with a concentration of / s was used.

[0082] The cosmetic compositions obtained in Examples 1-14, Reference Example 1, and Comparative Examples 1-3 were all oil-in-water emulsions with a viscosity of 1000 mPa·s to 7000 mPa·s at 25°C. The tamarind gum used in the cosmetic composition of Reference Example 1 was a thickening agent and was added to make the degree of vibration applied to the cosmetic composition in the vibration test described later similar to that of the cosmetic composition of Comparative Example 1.

[0083] The emulsification stability of the cosmetic compositions of Examples 1-14, Reference Example 1, and Comparative Examples 1-3 was evaluated by performing the following vibration tests.

[0084] Multiple cylindrical screw-top tubes (made of polyethylene terephthalate, height: 8.2 cm, diameter: 3.4 cm) with a capacity of 50 ml each were prepared. 20 g of the cosmetic compositions of Examples 1-14, Reference Example 1, and Comparative Examples 1-3 were each injected into separate screw-top tubes, and the caps were then closed.

[0085] Each screw-cap tube containing the cosmetic composition was laid on its side, and a vibration test was performed by applying vibrations for 10 minutes at an amplitude of 11.7 cm in a direction parallel to the height, at a speed of approximately 80 reciprocations in 30 seconds. After the vibration test, the state of each cosmetic composition was visually observed, and the emulsification stability was evaluated according to the following criteria.

[0086] [Evaluation criteria for emulsification stability of cosmetic compositions in Examples 1-14, Reference Example 1, and Comparative Examples 1-3] ◎: No change in emulsification state before and after the vibration test (no change in the appearance of the cosmetic composition contained in the screw tube was observed before and after the vibration test). ○: Although the size of the oil droplets after the vibration test is larger than before the vibration test, separation of the oil phase and the aqueous phase does not occur (no change in the appearance of the cosmetic composition contained in the screw tube is observed before and after the vibration test, but when the cosmetic composition contained in the screw tube is tilted on its side and observed visually from above before and after the vibration test, the oil droplet size of the cosmetic composition adhering to the wall of the screw tube is larger after the vibration test than before the vibration test). ×: The oil phase and water phase separated after the vibration test.

[0087] The formulations of each cosmetic composition and their evaluation results are shown in Tables 1 to 3.

[0088] [Table 1]

[0089] [Table 2]

[0090] [Table 3]

[0091] As shown in Tables 1 to 3, the cosmetic composition of Reference Example 1, which contains 10% by mass of volatile dimethicone, a volatile silicone other than cyclic silicone, did not change its emulsified state even after the vibration test. However, the cosmetic composition of Comparative Example 1, which contains 15% by mass of volatile dimethicone, and the cosmetic composition of Comparative Example 2, which contains 20% by mass of volatile dimethicone, separated the oil phase and aqueous phase after the vibration test. In contrast, the cosmetic compositions of Examples 1 to 14, which contain polyether-modified silicone, sorbitan fatty acid ester, or polyoxyethylene alkyl (12-14) ether, showed no change in their emulsified state or only an increase in the size of the oil droplets after the vibration test, exhibiting superior emulsification stability compared to the cosmetic compositions of Comparative Examples 1 and 2.

[0092] Furthermore, in Comparative Example 3, a cosmetic composition using polyoxyethylene lauryl ether (2E.O.), a nonionic surfactant commonly used in hair cosmetics, instead of polyether-modified silicone, sorbitan fatty acid ester, and polyoxyethylene alkyl (12-14) ether, the oil phase and aqueous phase separated after the vibration test.

[0093] Furthermore, the kinematic viscosity at 25°C is 140 mmHg. 2Compared to the cosmetic composition of Example 7 using polyether-modified silicone with a kinematic viscosity of 140 mm² at 25°C, this composition has a kinematic viscosity of 140 mm². 2 The cosmetic compositions of Examples 1-6 and 9-12, which used polyether-modified silicones with a kinematic viscosity exceeding 150 mmHg at 25°C, exhibited excellent emulsification stability. Therefore, as a polyether-modified silicone, a kinematic viscosity of 150 mmHg at 25°C was used. 2 It has been found that using a product with a viscosity of / s or higher results in superior emulsification stability. Furthermore, a comparison of the cosmetic composition of Example 7 and the cosmetic composition of Example 8 shows that using PEG-9 polydimethylsiloxyethyl dimethicone as the polyether-modified silicone results in superior emulsification stability.

[0094] (Example 15, Reference Example 2, Comparative Example 4) The cosmetic compositions of Example 15, Reference Example 2, and Comparative Example 4 were prepared by mixing each component to obtain the composition shown in Table 4.

[0095] The cosmetic compositions obtained in Example 15, Reference Example 2, and Comparative Example 4 were all oil-in-water emulsions with a viscosity of 1000 mPa·s to 2000 mPa·s at 25°C. The tamarind gum used in the cosmetic composition of Reference Example 2 was a thickening agent, added to achieve a similar level of vibration applied to the cosmetic composition during vibration testing as that of the cosmetic composition of Comparative Example 4.

[0096] The cosmetic compositions of Example 15, Reference Example 2, and Comparative Example 4 were subjected to vibration tests in the same manner as the cosmetic composition of Example 1, etc., to evaluate their emulsification stability. The emulsification stability of these cosmetic compositions was evaluated according to the following criteria.

[0097] [Evaluation criteria for emulsification stability of cosmetic compositions in Example 15, Reference Example 2, and Comparative Example 4] ○: No change in emulsification state before and after the vibration test (no change in the appearance of the cosmetic composition contained in the screw tube was observed before and after the vibration test). △: The size of the oil droplets after the vibration test is larger than before the vibration test (no change in the appearance of the cosmetic composition contained in the screw tube was observed before and after the vibration test, but when the cosmetic composition contained in the screw tube was tilted on its side and observed visually from above, the oil droplet size of the cosmetic composition adhering to the wall of the screw tube was larger after the vibration test than before the vibration test).

[0098] Table 4 shows the formulation of each cosmetic composition and their evaluation results.

[0099] [Table 4]

[0100] As shown in Table 4, the cosmetic composition of Reference Example 2, which contains 10% by mass of the volatile hydrocarbon isododecane, showed no change in its emulsified state even after the vibration test. However, the cosmetic composition of Comparative Example 4, which contains 15% by mass of isododecane, showed an increase in the size of the oil droplets after the vibration test. On the other hand, the cosmetic composition of Example 15, which contains polyether-modified silicone, showed no change in its emulsified state even after the vibration test, and the increase in the size of the oil droplets was suppressed, demonstrating superior emulsification stability compared to the cosmetic composition of Comparative Example 4.

[0101] The following are examples of hair treatment formulations 1-13.

[0102] (Prescription example 1) Cetanol 3% by mass, stearyltrimethylammonium chloride 0.6% by mass, behenyltrimethylammonium methylsulfate 0.5% by mass, distearyldimethylammonium chloride 0.6% by mass, volatile dimethicone (kinematic viscosity at 25°C is 1.5 mm) 2Dimethyl silicone (10% by mass), Isododecane 10% by mass, PEG-9 polydimethylsiloxyethyl dimethicone 0.1% by mass, Non-volatile dimethicone 2% by mass, Non-volatile dimethiconol 2% by mass, Alkyl (C12-15) benzoate 5% by mass, Isopropanol 0.3% by mass, Phenoxyethanol 0.4% by mass, Fragrance 0.2% by mass, Water 65.3% by mass

[0103] (Prescription examples 2-13) Formulation examples 2-13 are obtained by replacing only PEG-9 polydimethylsiloxyethyl dimethicone with one of the following ingredients from Formulation Example 1 above. Formulation Example 2: Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone, Formulation Example 3: PEG-3 Dimethicone, Formulation Example 4: PEG-9 Dimethicone, Formulation Example 5: PEG-10 Dimethicone, Formulation Example 6: PEG-12 Dimethicone, Formulation Example 7: PEG-11 Methyl Ether Dimethicone, Formulation Example 8: PEG-32 Methyl Ether Dimethicone, Formulation Example 9: Cetyl PEG / PPG-10 / 1 Dimethicone, Formulation Example 10: PEG / PPG-25 / 25 Dimethicone, Formulation Example 11: PEG / PPG-20 / 22 Butyl Ether Dimethicone, Formulation Example 12: (C12-14) Pareth-7, Formulation Example 13: Sorbitan Monooleate

Claims

1. A cosmetic composition which is an oil-in-water emulsion containing a higher alcohol, a cationic surfactant, and water, It contains volatile silicones other than cyclic silicones and / or volatile hydrocarbons, The amount of volatile silicones and / or volatile hydrocarbons other than the cyclic silicone is 15% by mass or more. The compound further contains polyether-modified silicone, sorbitan fatty acid ester, or polyoxyethylene alkyl (12-14) ether. A cosmetic composition characterized by having a viscosity of 1,000 to 18,000 mPa·s at 25°C.

2. The cosmetic composition according to claim 1, wherein the viscosity at 25°C is 3,000 to 8,000 mPa·s.

3. A cosmetic composition according to claim 1 or 2, wherein it does not contain one or more cyclic silicones selected from cyclotetrasiloxane, cyclopentasiloxane, and cyclohexasiloxane, or it contains one or more cyclic silicones selected from cyclotetrasiloxane, cyclopentasiloxane, and cyclohexasiloxane, and the amount of such silicone is 0.1% by mass or less.

4. A cosmetic composition according to any one of claims 1 to 3, for use on hair.

5. The cosmetic composition according to claim 4, which is used by applying it to the hair and not rinsing it off.

6. A hair treatment method characterized by using the cosmetic composition described in any one of claims 1 to 5.

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