Emulsified hair cosmetic composition and method for treating hair

Abstract

The present invention provides an emulsified hair cosmetic composition that offers excellent manageability of hair during application and after heat treatment, as well as excellent manageability and persistence of hair after heat treatment. [Solution] The emulsified hair cosmetic composition of the present invention contains levulinic acid (component A), a cationic surfactant (component B), an aliphatic alcohol having 8 to 24 carbon atoms (component C), a silicone compound (component D), and water (component E).

Description

[Technical Field]

[0001] This invention relates to an emulsified hair cosmetic composition. Furthermore, this invention relates to a method for treating hair using the above-mentioned emulsified hair cosmetic composition. [Background technology]

[0002] Hair treatments are known as an example of emulsified hair cosmetic compositions. Hair treatments include types such as in-bath treatments that are rinsed off and out-bath treatments that are left on. Emulsified hair cosmetic compositions such as lotion-type hair treatments (so-called hair milk) and cream-type hair treatments (so-called hair masks) are widely used as hair treatments. Compositions containing cationic surfactants are known as the above-mentioned emulsified hair cosmetic compositions (for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Special Publication No. 2004-509860 [Overview of the project] [Problems that the invention aims to solve]

[0004] Emulsified hair cosmetic compositions such as hair milk and hair masks are generally used in the following procedure: (1) Apply the emulsified hair cosmetic composition to the hair. (2) Rinse off the emulsified hair cosmetic composition applied to the hair. (3) Heat-treat the hair using a heat device such as a hair dryer or hair iron. Note that step (2) above may be omitted.

[0005] The emulsified hair cosmetic composition described above is required to have the property of providing smooth hair texture both during application and after heat treatment. In particular, smooth hair texture after heat treatment imparts a silky feel to the hair.

[0006] Furthermore, the emulsified hair cosmetic composition described above is required to possess not only the above-mentioned properties but also the property of good hair manageability after heat treatment. In particular, it is desirable that the hair manageability after heat treatment lasts for a long period of time.

[0007] Conventional emulsified hair cosmetic compositions can improve the manageability and smoothness of hair after heat treatment to a certain extent. However, it is difficult to maintain the manageability of hair after heat treatment for an extended period using conventional emulsified hair cosmetic compositions.

[0008] The object of the present invention is to provide an emulsified hair cosmetic composition that exhibits excellent manageability of hair during application and after heat treatment, as well as excellent manageability and persistence of hair after heat treatment. The object of the present invention is also to provide a method for treating hair using the above emulsified hair cosmetic composition. [Means for solving the problem]

[0009] The present invention provides an emulsified hair cosmetic composition comprising the following components (A), (B), (C), (D), and (E). Ingredient (A): Levulinic acid Ingredient (B): Cationic surfactant Ingredient (C): Aliphatic alcohols with 8 to 24 carbon atoms Component (D): Silicone compound Ingredient (E): Water

[0010] The emulsified hair cosmetic composition of the present invention preferably contains the following component (F). Ingredients (F): Ester oil

[0011] In the emulsified hair cosmetic composition of the present invention, it is preferable that component (D) comprises the following component (D1) and / or the following component (D2). Component (D1): Silicone oil with a viscosity of 10,000 mPa·s or more at 25°C. Component (D2): Amino-modified silicone with a viscosity of less than 10,000 mPa·s at 25°C.

[0012] The emulsified hair cosmetic composition of the present invention preferably contains the following component (G). Component (G): A polymer having a structure represented by the following formula (G)

[0013]

Chem.

[0014] In the above formula (G), R1 and R2 each independently represent a linear or branched aliphatic hydrocarbon group having 1 to 4 carbon atoms, or a hydrogen atom, and * represents the bonding position.

[0015] In the emulsified hair cosmetic composition of the present invention, it is preferable that the component (B) contains the following component (B1). Component (B1): A compound represented by the following formula (B1)

[0016] R 1 -C(=O)-NH-C3H6-N + (CH3)3X - (B1)

[0017] In the above formula (B1), R 1 represents a linear or branched aliphatic hydrocarbon group having 11 to 21 carbon atoms, and X - represents Cl - or Br - and represents.

[0018] The emulsified hair cosmetic composition of the present invention preferably contains the following component (H). Component (H): A nonionic surfactant

[0019] In the emulsified hair cosmetic composition of the present invention, it is preferable that the component (H) contains the following component (H1).

[0020] Component (H1): A polyglycerol fatty acid ester in which 2 to 6 fatty acids are ester-bonded to polyglycerol and the average number of added moles of glycerol is 4 to 12

[0021] The emulsified hair cosmetic composition of the present invention preferably contains the following component (I). Component (I): Cationic polymer

[0022] In the emulsified hair cosmetic composition of the present invention, the pH is preferably 7.0 or lower.

[0023] The emulsified hair cosmetic composition of the present invention is preferably used after applying it to the hair and then heat-treating the hair at a heat treatment temperature of 90°C or higher.

[0024] The present invention provides a hair treatment method comprising, in this order, an application step of applying the above-described emulsified hair cosmetic composition to the hair, and a heat treatment step of heating the hair to a heat treatment temperature of 90°C or higher.

[0025] The hair treatment method of the present invention preferably includes a washing step between the application step and the heat treatment step, in which the emulsified hair cosmetic composition applied to the hair is washed away. [Effects of the Invention]

[0026] The emulsified hair cosmetic composition of the present invention contains specific component (A), specific component (B), specific component (C), specific component (D), and specific component (E), and therefore provides excellent manageability of the hair during application and after heat treatment, as well as excellent manageability and persistence of the hair after heat treatment. [Modes for carrying out the invention]

[0027] The present invention will be described in detail below.

[0028] The emulsified hair cosmetic composition of the present invention comprises levulinic acid, a cationic surfactant, an aliphatic alcohol having 8 to 24 carbon atoms, a silicone compound, and water.

[0029] In this specification, the above-mentioned "levulinic acid" may be referred to as "component (A)".

[0030] In this specification, the above-mentioned "cationic surfactant" may be referred to as "component (B)".

[0031] In this specification, the above-mentioned "aliphatic alcohols having 8 to 24 carbon atoms" may be referred to as "component (C)".

[0032] In this specification, the above-mentioned "silicone compound" may be referred to as "component (D)".

[0033] In this specification, the above-mentioned "water" may be referred to as "component (E)".

[0034] Therefore, the emulsified hair cosmetic composition of the present invention comprises component (A), component (B), component (C), component (D), and component (E).

[0035] The emulsified hair cosmetic composition of the present invention, having the above-described structure, exhibits excellent manageability of the hair during application and after heat treatment, as well as excellent manageability and persistence of the hair after heat treatment.

[0036] The emulsified hair cosmetic composition of the present invention may contain ester oil.

[0037] In this specification, the above-mentioned "ester oil" may be referred to as "component (F)".

[0038] The emulsified hair cosmetic composition of the present invention may contain a polymer having a structure represented by the following formula (G).

[0039] [ka]

[0040] In formula (G) above, R1 and R2 each independently represent a linear or branched aliphatic hydrocarbon group having 1 to 4 carbon atoms, or a hydrogen atom, and * represents the bond position.

[0041] In this specification, the "polymer having the structure represented by formula (G)" may be referred to as "component (G)".

[0042] The emulsified hair cosmetic composition of the present invention may contain a nonionic surfactant.

[0043] In this specification, the above-mentioned "nonionic surfactant" may be referred to as "component (H)".

[0044] The emulsified hair cosmetic composition of the present invention may contain a cationic polymer.

[0045] In this specification, the above-mentioned "cationized polymer" may be referred to as "component (I)".

[0046] The emulsified hair cosmetic composition of the present invention may contain other components besides components (A) to (I).

[0047] Each of the above components, such as component (B), component (C), component (D), component (F), component (G), component (H), component (I), and other components, may be used individually or in combination of two or more.

[0048] In this specification, the content of each component in the emulsified hair cosmetic composition means the total content of all such components contained in the emulsified hair cosmetic composition. For example, the content of component (B) means the total content of all components (B) in the emulsified hair cosmetic composition.

[0049] The details of each component used in the emulsified hair cosmetic composition of the present invention are described below.

[0050] (Component (A)) Component (A) is levulinic acid. By using component (A), the manageability and smoothness of hair after heat treatment can be improved. In particular, by using component (A) in combination with component (D), a high level of smoothness is imparted to the hair. Furthermore, by using component (A), the manageability of hair after heat treatment can be improved. In addition, the manageability of hair after heat treatment can be improved. Moreover, by using component (A), even when the emulsified hair cosmetic composition is applied to dyed hair, discoloration of the hair is less likely to occur.

[0051] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (A) is preferably 0.3% by mass or more, more preferably 1.0% by mass or more, even more preferably 2.0% by mass or more, preferably 15.0% by mass or less, more preferably 10.0% by mass or less, and even more preferably 7.0% by mass or less. When the content of component (A) is above the lower limit and below the upper limit, the manageability, coherence, and persistence of these properties of the hair after heat treatment can be further improved.

[0052] (Component (B)) Component (B) is a cationic surfactant. By using component (B), the smoothness of the hair when applied can be improved, and the stability of the properties (emulsification stability) of the emulsified hair cosmetic composition can be enhanced. In particular, compositions that do not contain component (B) but contain component (A) tend to have a reduced feel when applied, but in the present invention, by combining component (A) and component (B), the composition can be made into a cationic emulsion system, thus improving the feel when applied and improving the user experience. Component (B) may be used alone, or two or more types may be used in combination.

[0053] Examples of component (B) include monoalkyl quaternary ammonium salts, dialkyl quaternary ammonium salts, trialkyl quaternary ammonium salts, monoalkyl ether quaternary ammonium salts, alkylamines, and fatty acid amidoamines.

[0054] Examples of the above-mentioned monoalkyl type quaternary ammonium salts include lauryl trimethyl ammonium chloride, myristyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, alkyl (16,18) trimethyl ammonium chloride, alkyl (20 - 22) trimethyl ammonium chloride, stearyl dimethyl benzyl ammonium chloride, myristyl dimethyl benzyl ammonium chloride, tri(polyoxyethylene) stearyl ammonium chloride, and di(polyoxyethylene) oleyl methyl ammonium chloride, etc.

[0055] Examples of the above-mentioned fatty acid amide amines include dimethylaminoethyl myristate amide, dimethylaminopropyl myristate amide, diethylaminoethyl myristate amide, diethylaminopropyl myristate amide, dimethylaminoethyl palmitate amide, dimethylaminopropyl palmitate amide, diethylaminoethyl palmitate amide, diethylaminopropyl palmitate amide, dimethylaminoethyl stearate amide, dimethylaminopropyl stearate amide, diethylaminoethyl stearate amide, diethylaminopropyl stearate amide, dipropylaminoethyl stearate amide, dipropylaminopropyl stearate amide, dimethylaminoethyl behenate amide, dimethylaminopropyl behenate amide, diethylaminoethyl behenate amide, and diethylaminopropyl behenate amide, etc. [[ID=,6]]

[0056] In addition, as the component (B), a compound represented by the following formula (B1) is also included.

[0057] R 1 -C(=O)-NH-C3H6-N + (CH3)3X - (B1)

[0058] In the above formula (B1), R 1 represents a linear or branched aliphatic hydrocarbon group having 11 to 21 carbon atoms, and X - is Cl- Or Br - It represents.

[0059] R in the above formula (B1) 1 Examples of the aliphatic hydrocarbon group in the above formula include alkyl groups, alkenyl groups, and alkynyl groups. The number of carbon atoms in the aliphatic hydrocarbon group is preferably 13 to 21. From the viewpoint of further improving the manageability of the hair when applied, R in formula (B1) above is preferable. 1 It is preferable that this represents a linear or branched alkyl group, preferably a linear aliphatic hydrocarbon group, and more preferably a linear alkyl group.

[0060] X in the above formula (B1) - This is a counteranion of a quaternary ammonium cation.

[0061] In this specification, the "compound represented by formula (B1)" may be referred to as "component (B1)".

[0062] Examples of component (B1) include palmitamidopropyltrimonium chloride (INCI name: Palmitamidopropyltrimonium Chloride).

[0063] Examples of commercially available products containing ingredient (B1) include the product name "VARISOFT PATC" (manufactured by Evonik Japan).

[0064] Component (B) preferably contains component (B1). In this case, the smoothness of the hair when applied can be further improved. Furthermore, the stability of the properties can be further enhanced.

[0065] Furthermore, when the emulsified hair cosmetic composition of the present invention contains component (G), it is particularly preferable that component (B) contains component (B1). By using component (B1) when component (G) is included, the stability of the properties can be improved.

[0066] From the viewpoint of further improving the stability of the properties, it is preferable that component (B) contains a monoalkyl type quaternary ammonium salt.

[0067] In this specification, the above-mentioned "monoalkyl quaternary ammonium salt" may be referred to as "component (B2)".

[0068] Therefore, it is preferable that component (B) contains component (B2).

[0069] From the viewpoint of further improving the stability of the properties, it is preferable that component (B) contains both component (B1) and component (B2).

[0070] Component (B2) is, for example, a compound represented by the following formula (B2).

[0071] R 1 -N + (CH3)3X - (B2)

[0072] In the above formula (B2), R 1 R represents a linear or branched aliphatic hydrocarbon group having 12 to 22 carbon atoms. Preferably, the aliphatic hydrocarbon group has 16 to 22 carbon atoms. Examples of the aliphatic hydrocarbon group include alkyl groups, alkenyl groups, and alkynyl groups. From the viewpoint of further improving the coating properties, R in formula (B2) above is preferable. 1 It is preferably a linear or branched alkyl group, and more preferably a linear alkyl group.

[0073] In the above formula (B2), X - Cl is a counteranion of a quaternary ammonium cation, - Or Br - It represents.

[0074] Examples of the component (B2) represented by the above formula (B2) include stearyltrimethylammonium chloride (steartrimonium chloride, INCI name: Steartrimonium Chloride), stearyltrimethylammonium bromide (steartrimonium bromide), alkyltrimethylammonium chloride (behentrimonium chloride, INCI name: Behentrimonium Chloride), cetyltrimethylammonium chloride (cetrimonium chloride), and cetyltrimethylammonium bromide (cetrimonium bromide).

[0075] Examples of commercially available products containing the component (B2) represented by the above formula (B2) include the product names "VARISOFT 300" and "VARISOFT 85 Pellets" (both manufactured by Evonik Japan), "ARQUAD 18-50" (manufactured by AkzoNobel), "CTAC 30KC" (manufactured by KCI), "NIKKOL CA-2250E" (manufactured by Nikko Chemicals), "GENAMIN KDMP" (manufactured by Clariant), and "Cotamin 86W" (manufactured by Kao Corporation).

[0076] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (B1) is preferably 0.05% by mass or more, more preferably 0.3% by mass or more, even more preferably 1.0% by mass or more, preferably 7.0% by mass or less, more preferably 5.0% by mass or less, and even more preferably 3.0% by mass or less. When the content of component (B1) is above the lower limit and below the upper limit, the smoothness of the hair when applied can be further improved, and the stability of the properties can be further enhanced.

[0077] The content of component (B2) in 100% by mass of the emulsified hair cosmetic composition of the present invention is not particularly limited and may be 0.05% by mass or more, 0.3% by mass or more, 1.0% by mass or more, 10.0% by mass or less, 7.0% by mass or less, or 5.0% by mass or less. When the content of component (B2) is above the lower limit and below the upper limit, the smoothness of the hair when applied can be further improved, and the stability of the properties can be further enhanced.

[0078] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (B) is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, even more preferably 1.0% by mass or more, preferably 10.0% by mass or less, more preferably 7.0% by mass or less, and even more preferably 5.0% by mass or less. When the content of component (B) is above the lower limit and below the upper limit, the smoothness of the hair when applied can be further improved, and the stability of the properties can be further enhanced.

[0079] (Component (C)) Component (C) is an aliphatic alcohol having 8 to 24 carbon atoms. Component (C) is a so-called higher alcohol. By using component (C), the stability of the properties of the emulsified hair cosmetic composition can be improved. Component (C) may be used alone, or two or more may be used in combination.

[0080] From the viewpoint of further enhancing the stability of the properties, component (C) is preferably an aliphatic alcohol having 12 to 24 carbon atoms.

[0081] Examples of component (C) include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetearyl alcohol, isostearyl alcohol, hexyldecanol, 2-octyldodecanol, oleyl alcohol, decyltetradecanol, and behenyl alcohol.

[0082] From the viewpoint of further enhancing the stability of the properties, component (C) is preferably an aliphatic alcohol (at least one aliphatic alcohol) selected from the group consisting of stearyl alcohol, cetyl alcohol, and behenyl alcohol, more preferably contains stearyl alcohol, and even more preferably is stearyl alcohol.

[0083] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (C) is preferably 0.3% by mass or more, more preferably 1.0% by mass or more, even more preferably 5.0% by mass or more, preferably 20.0% by mass or less, more preferably 15.0% by mass or less, and even more preferably 13.0% by mass or less. When the content of component (C) is above the lower limit and below the upper limit, the stability of the properties can be further enhanced.

[0084] (Component (D)) Component (D) is a silicone compound. Preferably, component (D) is a silicone oil, which is an oily component. By using component (D), the manageability of the hair during application and after heat treatment can be improved. Component (D) may be used alone, or two or more may be used in combination.

[0085] Examples of component (D) include methylpolysiloxane (dimethicone) and dimethyl silicone oil such as highly polymerized methylpolysiloxane; methylphenyl silicone oil such as methylphenylpolysiloxane; cyclic silicone oil such as methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane; amino-modified silicones such as aminopropylmethylsiloxane-dimethylsiloxane copolymer, aminoethylaminopropylsiloxane-dimethylsiloxane copolymer, and aminoethylaminopropylmethylsiloxane-dimethylsiloxane copolymer; carboxy-modified silicones, fatty acid-modified silicones, alcohol-modified silicones, aliphatic alcohol-modified silicones, epoxy-modified silicones, fluorine-modified silicones, and alkyl-modified silicones; methylhydrogenpolysiloxane; dimethiconol, etc.

[0086] Component (D) preferably contains a silicone oil having a viscosity of 10,000 mPa·s or more at 25°C and / or an amino-modified silicone having a viscosity of less than 10,000 mPa·s at 25°C.

[0087] In this specification, the above-mentioned "silicone oil having a viscosity of 10,000 mPa·s or more at 25°C" may be referred to as "component (D1)," and the above-mentioned "amino-modified silicone having a viscosity of less than 10,000 mPa·s at 25°C" may be referred to as "component (D2)." Component (D1) is a highly polymerized silicone. Note that component (D1) includes an amino-modified silicone having a viscosity of 10,000 mPa·s or more at 25°C.

[0088] Therefore, it is preferable that component (D) contains component (D1) and / or component (D2). In this case, component (D) may contain component (D1), may contain component (D2), or may contain both component (D1) and component (D2).

[0089] When the emulsified hair cosmetic composition of the present invention contains component (D1), the manageability of the hair during application and after heat treatment can be further improved. When the emulsified hair cosmetic composition of the present invention contains component (D2), the softness of the hair during application and after heat treatment can be enhanced.

[0090] Component (D) preferably contains both component (D1) and component (D2). In this case, the manageability of the hair after heat treatment can be further improved, and the softness of the hair during application and after heat treatment can be enhanced.

[0091] The viscosity of component (D1) at 25°C is 10,000 mPa·s or more, preferably 60,000 mPa·s or more, more preferably 80,000 mPa·s or more, and preferably 30,000,000 mPa·s or less. When the viscosity is above the lower limit and below the upper limit, the smoothness of the hair when applied can be further improved.

[0092] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (D1) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, preferably 10.0% by mass or less, and more preferably 5.0% by mass or less. When the content of component (D1) is above the lower limit and below the upper limit, the manageability of the hair during application and after heat treatment can be further improved.

[0093] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (D2) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, preferably 10.0% by mass or less, and more preferably 5.0% by mass or less. When the content of component (D2) is above the lower limit and below the upper limit, the manageability and softness of the hair during application and after heat treatment can be further improved.

[0094] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (D) is preferably 1.0% by mass or more, more preferably 3.0% by mass or more, preferably 30.0% by mass or less, and more preferably 20.0% by mass or less. When the content of component (D) is above the lower limit and below the upper limit, the manageability of the hair during application and after heat treatment can be further improved.

[0095] (Component (E)) Component (E) is water. Component (E) is preferably purified water.

[0096] The content of component (E) in the emulsified hair cosmetic composition of the present invention can be appropriately adjusted by the content of other components. In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (E) is preferably 30.0% by mass or more, more preferably 40.0% by mass or more, even more preferably 45.0% by mass or more, preferably 90.0% by mass or less, more preferably 85.0% by mass or less, and even more preferably 80.0% by mass or less.

[0097] (Component (F)) Component (F) is an ester oil. The emulsified hair cosmetic composition of the present invention preferably contains component (F). By using component (F), the stability of the properties (emulsification stability) of the emulsified hair cosmetic composition can be further improved. In particular, by using component (F), the dispersibility of component (D) is improved, and the stability of the properties can be further improved.

[0098] Ingredients (F) include cetyl octanoate, ethyl oleate, isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, 2-ethylhexyl palmitate, octyldodecyl myristate, isopropyl isostearate, propylene glycol isostearate, cetyl 2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, caprylic / capric triglyceride, isononyl isononanoate, diisopropyl adipate, pentaerythrityl tetraoctanoate, pentaerythrityl tetraisostearate, and diisopropyl malate. Examples include tearyl ester, erythrityl triethylhexanoate, 2-ethylhexyl hydroxystearate, hexa(hydroxystearate / stearate / rosinate)dipentaerythrityl, tetra(hydroxystearate / isostearate)dipentaerythrityl, hexahydroxystearate dipentaerythrityl, (ethylhexanoate / stearate / adipate)glyceryl, tri(caprylic / capric / myristic / stearate)glyceryl, hexa(behenate / benzoate / ethylhexanoate)dipentaerythrityl, and alkyl benzoate (C12-15).

[0099] Furthermore, component (F) may also include dimer acid esters such as di(isostearyl / phytosteryl) dimer dilinoleate, dimer dilinoleyl dimer dilinoleate, dimer dilinoleyl (phytosteryl / isostearyl / cetyl / stearyl / behenyl) dimer dilinoleate, hydrogenated castor oil dimer dilinoleate, and dimer dilinoleate diglyceryl isostearate. Additionally, component (F) may also include dimer ol esters such as hydrogenated rosin condensate dimer dilinoleate and dimer dilinoleyl diisostearate.

[0100] From the viewpoint of further improving the manageability of hair after heat treatment, it is preferable that component (F) contains a dimer acid ester and / or a dimer ol ester.

[0101] In this specification, the above-mentioned "dimer acid ester and / or dimer ol ester" may be referred to as "component (F1)".

[0102] Therefore, it is preferable that component (F) contains component (F1). In this case, component (F) may contain a dimer acid ester, a dimer ol ester, or both a dimer acid ester and a dimer ol ester.

[0103] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (F1) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, preferably 10.0% by mass or less, and more preferably 5.0% by mass or less. When the content of component (F1) is above the lower limit and below the upper limit, the manageability of the hair after heat treatment can be further improved, and the stability of its properties can be further improved.

[0104] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (F) is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, preferably 20.0% by mass or less, and more preferably 10.0% by mass or less. When the content of component (F) is above the lower limit and below the upper limit, the stability of the properties can be further improved.

[0105] (Component (G)) Component (G) is a polymer having the structure represented by the following formula (G). The emulsified hair cosmetic composition of the present invention preferably contains component (G). By using component (G), the manageability of the hair after heat treatment can be significantly improved. As a result, a high level of smoothness is imparted to the hair. Component (G) may be used alone, or two or more may be used in combination.

[0106] [ka]

[0107] In formula (G) above, R1 and R2 each independently represent a linear or branched aliphatic hydrocarbon group having 1 to 4 carbon atoms, or a hydrogen atom, and * represents the bond position. In formula (G) above, it is preferable that R1 and R2 each independently represent a hydrogen atom or an ethyl group. In formula (G) above, it is more preferable that at least one of R1 and R2 is a hydrogen atom, with R1 being a hydrogen atom or an ethyl group, and R2 being a hydrogen atom.

[0108] Component (G) is preferably a polymer having repeating structural units including the structure represented by formula (G) above, and more preferably a polymer having structural units represented by the following formula (G1).

[0109] [ka]

[0110] In formula (G1) above, R1 and R2 each independently represent a linear or branched aliphatic hydrocarbon group having 1 to 4 carbon atoms, or a hydrogen atom, and R3 represents a group having 1 to 5 carbon atoms. The preferred configurations of R1 and R2 in formula (G1) above are the same as the preferred configurations of R1 and R2 in formula (G) above. In formula (G1) above, R3 may be linear or branched. The number of carbon atoms in R3 in formula (G1) above is preferably 2 or more, more preferably 3 or more, and preferably 4 or less.

[0111] Examples of component (G) include (methyl vinyl ether / maleic acid) copolymer (INCI name: PVM / MA Copolymer) and polyimide-1 (INCI name: Polyimide-1). A commercially available polyimide-1 product is, for example, "AQUAFLEX XL-30" (manufactured by Ashland). A commercially available (methyl vinyl ether / maleic acid) copolymer product is, for example, "GANTREZ S-97", "GANTREZ AN-119", and "GANTREZ AN-169" (all manufactured by Ashland). A commercially available mixture of polyimide-1 and (methyl vinyl ether / maleic acid) copolymer is, for example, "Styleze XT3" (manufactured by Ashland).

[0112] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (G) is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, preferably 2.0% by mass or less, more preferably 1.0% by mass or less, and even more preferably 0.5% by mass or less. When the content of component (G) is above the lower limit and below the upper limit, the manageability of the hair after heat treatment can be further improved.

[0113] (Component (H)) Component (H) is a nonionic surfactant. The emulsified hair cosmetic composition of the present invention preferably contains component (H). By using component (H), the stability of the properties (emulsification stability) of the emulsified hair cosmetic composition can be further enhanced. Component (H) may be used alone, or two or more may be used in combination.

[0114] Examples of component (H) include sorbitan fatty acid esters, glycerin fatty acid esters and their alkylene oxide adducts, polyoxyalkylene alkyl ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene alkylphenols, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkylphenyl formaldehyde condensates, polyoxyethylene sterols and their derivatives, polyoxyethylene lanolin and its derivatives, polyoxyethylene beeswax derivatives, sugar esters, polyoxyethylene hydrogenated castor oil, and polyoxyethylene castor oil.

[0115] Examples of the above-mentioned sorbitan fatty acid esters include sorbitan monooleate, sorbitan monostearate, sorbitan monoisostearate, sorbitan monopalmitate, sorbitan monolaurate, sorbitan trioleate, sorbitan tristearate, sorbitan sesquioleate, sorbitan sesquiisostearate, and sorbitan coconut oil fatty acid.

[0116] Examples of alkylene oxide adducts of the above-mentioned sorbitan fatty acid esters include polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan monoisostearate, polyoxyethylene sorbitan monococonut oil fatty acid, polyoxyethylene sorbitan tristearate, and polyoxyethylene sorbitan trioleate.

[0117] The glycerol fatty acid ester described above may be a monoglycerol fatty acid ester or a polyglycerol fatty acid ester.

[0118] Examples of the above-mentioned monoglycerin fatty acid esters include glyceryl monocaprylate, glyceryl monocaprate, glyceryl monolaurate, glyceryl monomyristate, glyceryl monopalmitate, glyceryl monostearate, glyceryl monoisostearate, glyceryl monobehenate, glyceryl monooleate, glyceryl monoerucate, glyceryl sesquioleate, glyceryl distearate, glyceryl diisostearate, and glyceryl diarachinate.

[0119] Examples of the above polyglycerin fatty acid esters include polyglycerin fatty acid esters with a degree of polymerization of 2 to 10, such as diglyceryl monocaprylate, decaglyceryl monocaprylate, hexaglyceryl monocaprate, tetraglyceryl monolaurate, hexaglyceryl monolaurate, decaglyceryl monolaurate, poly(4-10)glyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monoisostearate, poly(2-10)glyceryl monostearate, diglyceryl monooleate, hexaglyceryl monooleate, diglyceryl sesquioleate, poly(2-10)glyceryl diisostearate, poly(6-10)glyceryl distearate, diglyceryl triisostearate, and poly(10)glyceryl tristearate.

[0120] Examples of alkylene oxide adducts of the above-mentioned glycerin fatty acid esters include polyoxyethylene glyceryl monostearate and polyoxyethylene glyceryl monooleate.

[0121] Examples of the above-mentioned polyoxyalkylene alkyl ethers include polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene polyoxypropylene lauryl ether, polyoxypropylene cetyl ether, polyoxypropylene isocetyl ether, polyoxypropylene stearyl ether, and polyoxypropylene oleyl ether.

[0122] Examples of the polyoxyalkylene fatty acid esters mentioned above include polyethylene glycol fatty acid esters such as polyethylene glycol monooleate, polyethylene glycol monostearate, polyethylene glycol distearate, and polyethylene glycol monolaurate; and propylene glycol fatty acid esters such as propylene glycol monostearate, propylene glycol monolaurate, and propylene glycol monooleate.

[0123] From the viewpoint of further improving the applicability of the emulsified hair cosmetic composition, it is preferable that component (H) contains a polyglycerin fatty acid ester in which 2 to 6 fatty acids are ester-bonded to polyglycerin and the average number of added moles of glycerin is 4 to 12.

[0124] In this specification, the above-mentioned "polyglycerol fatty acid ester having 2 to 6 fatty acids ester-bonded to polyglycerol and an average number of added moles of glycerol of 4 to 12" may be referred to as "component (H1)".

[0125] Therefore, it is preferable that component (H) contains component (H1).

[0126] Examples of components (H1) include polyglycerin di-fatty acid esters, polyglycerin tri-fatty acid esters, polyglycerin tetra-fatty acid esters, polyglycerin penta-fatty acid esters, and polyglycerin hexa-fatty acid esters.

[0127] Component (H1) is preferably a polyglycerin fatty acid ester (at least one polyglycerin fatty acid ester) selected from the group consisting of polyglycerin di-fatty acid esters and polyglycerin tri-fatty acid esters.

[0128] The average number of moles of glycerin added to the polyglycerin portion of component (H1) is preferably 5 to 10.

[0129] The fatty acid in component (H1) is a linear or branched saturated or unsaturated fatty acid having 10 to 22 carbon atoms. The number of carbon atoms is preferably 12 to 18. Examples of such fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, and oleic acid. Stearic acid is preferred.

[0130] More specifically, the components (H1) include polyglyceryl-10 distearate, polyglyceryl-10 diisostearate, polyglyceryl-5 dioleate, polyglyceryl-10 dioleate, polyglyceryl-10 dimyristate, polyglyceryl-10 trilaurate, polyglyceryl-5 trimiristate, polyglyceryl-5 trioleate, polyglyceryl-10 pentastearate, polyglyceryl-10 pentaoleate, and polyglyceryl-5 hexastearate.

[0131] Component (H1) is preferably a polyglycerin fatty acid ester (at least one polyglycerin fatty acid ester) selected from the group consisting of polyglyceryl-10 distearate, polyglyceryl-10 diisostearate, polyglyceryl-10 pentastearate, polyglyceryl-5 trioleate, polyglyceryl-10 trilaurate, and polyglyceryl-10 dioleate, and more preferably polyglyceryl-10 distearate.

[0132] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (H1) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, preferably 10.0% by mass or less, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the content of component (H1) is above the lower limit and below the upper limit, the applicability of the emulsified hair cosmetic composition can be further improved.

[0133] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (H) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, preferably 10.0% by mass or less, more preferably 5.0% by mass or less, and even more preferably 2.0% by mass or less. When the content of component (H) is above the lower limit and below the upper limit, the applicability of the emulsified hair cosmetic composition can be further improved.

[0134] (Component (I)) Component (I) is a cationic polymer. The emulsified hair cosmetic composition of the present invention preferably contains component (I). By using component (I), the manageability and softness of the hair during rinsing and after heat treatment can be improved. Component (I) may be used alone or in combination of two or more types.

[0135] Component (I) includes cationized cellulose; cationized guar gum such as O-[2-hydroxy-3-(trimethylammonio)propyl]guar gum chloride; cationized starch; diallyl quaternary ammonium salt polymer; diallyl quaternary ammonium salt / acrylamide copolymer; quaternary polyvinylpyrrolidone derivative; polyglycol polyamine condensate; adipic acid-dimethylaminohydroxypropylethylenetriamine copolymer; and cationized dextran.

[0136] From the viewpoint of further enhancing the manageability and softness of the hair during rinsing and after heat treatment, component (I) preferably contains cationized cellulose, and more preferably is cationized cellulose.

[0137] In this specification, the above-mentioned "cationized cellulose" may be referred to as "component (I1)".

[0138] Therefore, component (I) preferably contains component (I1), and is preferably component (I1).

[0139] Component (I1) is more preferably a cationized cellulose having an alkyl group. The number of carbon atoms in the alkyl group is preferably 10 or more, preferably 24 or less, and more preferably 22 or less.

[0140] Component (I1) is preferably polyquaternium-67. In this case, the manageability and softness of the hair during rinsing and after heat treatment can be further enhanced. The above polyquaternium-67 is a polymer of a quaternary ammonium salt obtained by the addition reaction of trimethylammonium-substituted epoxide and lauryldimethylammonium-substituted epoxide to hydroxyethylcellulose, and is a cationized hydroxyethylcellulose derivative.

[0141] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (I1) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, preferably 1.0% by mass or less, and more preferably 0.7% by mass or less. When the content of component (I1) is above the lower limit and below the upper limit, the manageability and softness of the hair during rinsing and after heat treatment can be further enhanced.

[0142] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of component (I) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, preferably 1.0% by mass or less, and more preferably 0.7% by mass or less. When the content of component (I) is above the lower limit and below the upper limit, the manageability and softness of the hair during rinsing and after heat treatment can be further enhanced.

[0143] (vegetable oil) The emulsified hair cosmetic composition of the present invention preferably contains a vegetable oil. By using the above-mentioned vegetable oil, the manageability of the hair after heat treatment can be further improved. The above-mentioned vegetable oil may be used alone or in combination of two or more types.

[0144] Examples of the above-mentioned vegetable oils include macadamia nut oil, eucalyptus oil, coconut oil, avocado oil, safflower oil, olive oil, palm oil, palm kernel oil, kukui nut oil, shea butter, cocoa butter, almond oil, sunflower oil, rosehip oil, olive squalane, camellia oil, kiwi fruit seed oil, camellia oil, apricot kernel oil, sesame oil, soybean oil, jojoba oil, castor oil, hazelnut oil, meadowfoam oil, peppermint oil, argan oil, carrot oil, lavender oil, sugar squalane, and crambe abyssinica seed oil, astrocaryan murumuru seed butter, etc.

[0145] In 100% by mass of the emulsified hair cosmetic composition of the present invention, the content of vegetable oil is preferably 0.05% by mass or more, more preferably 0.2% by mass or more, preferably 10.0% by mass or less, and more preferably 5.0% by mass or less. When the content of vegetable oil is above the lower limit and below the upper limit, the manageability of the hair after heat treatment can be further improved.

[0146] (Other ingredients) The emulsified hair cosmetic composition of the present invention may contain other components besides the above-mentioned components (A) to (I) and vegetable oils. These other components are not particularly limited, but may include: hydrocarbon oils; lower alcohols such as ethanol; polyhydric alcohols; anionic surfactants; amphoteric surfactants; humectants; bactericides; pearlescent agents; anti-inflammatory agents such as glycyrrhizic acid and its salts; cooling agents such as menthol; pH adjusters such as phosphoric acid and its salts, citric acid and its salts, lactic acid and its salts, sodium hydroxide, and triethanolamine; fragrances; UV absorbers; antioxidants; metal ion chelating agents; film-forming polymer compounds such as polyvinylpyrrolidone; powders such as kaolin, silica, and talc; dyes; pigments; vitamins; amino acids; astringents; whitening agents; plant and animal extracts; acids; alkalis, etc. Each of these other components may be used individually or in combination of two or more.

[0147] <Hydrogen oils> Examples of the above-mentioned hydrocarbon oils include α-olefin oligomers, light isoparaffins, light liquid isoparaffins, squalane, synthetic squalane, vegetable squalane, liquid isoparaffins, and liquid paraffins.

[0148] (Further details on the emulsified hair cosmetic composition) The emulsified hair cosmetic composition of the present invention is preferably an oil-in-water (O / W) type emulsified hair cosmetic composition.

[0149] The pH of the emulsified hair cosmetic composition of the present invention is preferably 2.0 or higher, more preferably 2.5 or higher, more preferably 7.0 or lower, and more preferably 5.0 or lower. When the above pH is above the lower limit and below the upper limit, the effects of the present invention can be exhibited even more effectively.

[0150] The emulsified hair cosmetic composition of the present invention is a hair cosmetic composition used on hair. Examples of the emulsified hair cosmetic composition of the present invention include hair treatments, hair styling compositions, hair dye compositions, and hair cleansing compositions. The emulsified hair cosmetic composition of the present invention is preferably a hair treatment, as the effects of the present invention are particularly effectively exhibited in this case. Examples of the above-mentioned hair treatments include in-bath hair treatments that are used after application and then rinsed off, and out-of-bath treatments that are used without rinsing after application.

[0151] The emulsified hair cosmetic composition of the present invention is preferably used by applying it to the hair and then rinsing it off. More preferably, the emulsified hair cosmetic composition of the present invention is an emulsified hair cosmetic composition that is used by applying it to the hair and then rinsing it off.

[0152] The emulsified hair cosmetic composition of the present invention is preferably used after applying it to the hair and then heat-treating the hair at a heat treatment temperature of 90°C or higher. Alternatively, the emulsified hair cosmetic composition of the present invention may be used after applying it to the hair, rinsing off the applied emulsified hair cosmetic composition, and then heat-treating the hair at a heat treatment temperature of 90°C or higher. From the viewpoint of allowing the components of the emulsified hair cosmetic composition to penetrate the hair more effectively, the heat treatment temperature is preferably 110°C or higher, and more preferably 150°C or higher. Furthermore, from the viewpoint of suppressing heat damage to the hair, the heat treatment temperature is preferably 250°C or lower, and more preferably 230°C or lower. Methods for heating the hair include using heating devices such as hair dryers and hair irons. A hair iron may be used after using a hair dryer.

[0153] As a method for producing the emulsified hair cosmetic composition of the present invention, known methods for producing emulsified hair cosmetic compositions can be employed. Examples of methods for producing the emulsified hair cosmetic composition of the present invention include mixing and emulsifying each component. Homomixers and disperser mixers can be used for mixing and emulsifying. Emulsification may be performed by phase inversion emulsification. Emulsification may be performed after mixing each of the above components, or it may be performed at the time of mixing each component.

[0154] (Hair treatment methods) The hair treatment method of the present invention comprises, in this order, an application step of applying the emulsified hair cosmetic composition described above to the hair, and a heat treatment step of heating the hair to a heat treatment temperature of 90°C or higher. The hair treatment method of the present invention may also include a washing step between the application step and the heat treatment step of washing off the emulsified hair cosmetic composition applied to the hair.

[0155] In the application process described above, it is preferable to leave the emulsified hair cosmetic composition on the hair for at least 1 minute and no more than 60 minutes (preferably at least 2 minutes and no more than 30 minutes).

[0156] In the above washing step, it is preferable to rinse off the emulsified hair cosmetic composition applied to the hair with water.

[0157] The heat treatment temperature in the above heat treatment step is preferably 110°C or higher, more preferably 150°C or higher, more preferably 250°C or lower, and more preferably 230°C or lower. If the heat treatment temperature is above the lower limit, the components in the emulsified hair cosmetic composition can penetrate the hair more effectively. If the heat treatment temperature is below the upper limit, damage to the hair due to heat can be suppressed.

[0158] Methods for heating hair in the above heat treatment process include using heating devices such as hair dryers and hair irons.

[0159] The above heat treatment process may include, in this order, a first heat treatment step of heating the hair with a hair dryer and a second heat treatment step of heating the hair with a hair iron. In this case, it is sufficient that the heat treatment temperature of the hair in at least one of the first and second heat treatment steps is equal to or greater than the lower limit. Typically, the heat treatment temperature of the hair in the second heat treatment step is higher than the heat treatment temperature of the hair in the first heat treatment step. [Examples]

[0160] The present invention will be described in detail below with reference to examples and comparative examples. The present invention is not limited to the following examples.

[0161] The main components used in the examples and comparative examples are as follows.

[0162] (Component (A)) Levulinic acid

[0163] (Component (B)) Ingredients (B1): Palmitamidopropyltrimonium chloride: Trade name "VARISOFT PATC", manufactured by Evonik Japan.

[0164] Ingredients (B2): Behentrimonium chloride: Trade name "GENAMIN KDMP", manufactured by Clariant, dimethyltrimethylammonium behenate. Steartrimonium chloride: Product name "Cotamin 86W", manufactured by Kao Corporation, dimethyltrimethylammonium stearate chloride.

[0165] (Component (D)) Ingredient (D1): Highly polymerized dimethylpolysiloxane: Trade name "DOWSIL BY11-026", manufactured by Dow-Toray.

[0166] Ingredients (D2): Amino-modified silicone: Product name "BELSIL ADM 1650", manufactured by Asahi Kasei Wacker Corporation.

[0167] Components (D) other than components (D1) and (D2): Dimethylpolysiloxane (5 mPa·s): Viscosity at 25°C: 5 mPa·s Dimethylpolysiloxane (20 mPa·s): Viscosity at 25°C: 20 mPa·s Dimethylpolysiloxane (350 mPa·s): Viscosity at 25°C: 350 mPa·s

[0168] (Component (G)) Polyimide-1: Product name "AQUAFLEX XL-30", manufactured by Ashland Corporation. (Methyl vinyl ether / maleic acid) copolymer: Product name "GANTREZ S-97", manufactured by Ashland Corporation.

[0169] (Component (I)) Polyquaternium-67: Product name "SoftCAT Polymer SL-30", manufactured by Dow Chemical Company. Polyquaternium-10: Product name "Cachinaru HC-200", manufactured by Toho Chemical Industry Co., Ltd.

[0170] (Examples 1-21 and Comparative Examples 1-5) Emulsified hair cosmetic compositions were prepared by blending the ingredients shown in Tables 1 to 5 below (the blending unit is mass%). The blending amounts in the tables (amount blended in 100% mass of the emulsified hair cosmetic composition) are shown in net amounts (unit: mass%). The pH of the emulsified hair cosmetic compositions obtained in Examples 1 to 16 and 19 to 21 was in the range of 2.0 to 5.0. The pH of the emulsified hair cosmetic compositions obtained in Examples 17 and 18 was in the range of 6.0 to 7.0. Furthermore, the emulsified hair cosmetic compositions obtained in Examples 1 to 16, 19 to 21 and Comparative Examples 1 to 4 were cream-like, while the emulsified hair cosmetic compositions obtained in Examples 17 and 18 and Comparative Example 5 were emulsion-like.

[0171] (evaluation) The resulting emulsified hair cosmetic compositions were evaluated as follows. The evaluation results are shown in the table. The evaluation was conducted by three expert evaluators.

[0172] (Test Example 1: Stability of Properties (Emulsification Stability)) The resulting emulsified hair cosmetic composition was stored at 40°C for 24 hours after preparation. The properties of the emulsified hair cosmetic composition after storage were observed visually and evaluated according to the following criteria.

[0173] <Evaluation Criteria for Property Stability> ○ (Good): Maintains a uniform emulsion texture. × (Poor): Separation or creaming has occurred, resulting in an uneven texture.

[0174] Furthermore, the emulsified hair cosmetic compositions obtained in Comparative Examples 2 and 4 were not evaluated further because they exhibited poor stability in their properties.

[0175] [Evaluation of Examples 1-16, 19-21 and Comparative Examples 1, 3 (Cream-type emulsified hair cosmetic compositions)] (Test Example 2A: Hair manageability upon application) A strand of human hair (30 cm long, 10 g in weight) was thoroughly wet with 40°C water, then combed through it three times, and the water was squeezed out by gripping the strand with the hand. Approximately 10 g of emulsified hair cosmetic composition was applied evenly to this strand of hair by running the fingers through it. The ease of combing (the degree of resistance due to friction of wet hair: the weight of combing) after applying the emulsified hair cosmetic composition was evaluated and judged according to the following criteria.

[0176] <Evaluation criteria for hair smoothness during application> ○ (Good): There is almost no resistance due to friction (heaviness when fingers glide over the skin). × (Defective): A noticeable resistance due to friction (heaviness when fingers glide through the skin).

[0177] (Test example 3A: Hair manageability and hair cohesion after heat treatment) The hair strands evaluated in Test Example 2A above were washed with running water at 40°C for 1 minute to rinse off the emulsified hair cosmetic composition. The washed hair strands were towel-dried and then dried with a hairdryer. Next, a hair iron (set temperature: 180°C) was passed over the hair strands twice from top to bottom to heat-treat them. The hair strands after heat treatment were visually observed, and the manageability of the hair after heat treatment was judged according to the following criteria. In addition, the ease of combing the hair strands after heat treatment (the degree of resistance due to snagging) was evaluated, and the ease of combing the hair after heat treatment was judged according to the following criteria.

[0178] <Evaluation criteria for hair smoothness after heat treatment> ○ (Good): There is almost no feeling of resistance due to snagging (a feeling of fingers catching). × (Defective): A noticeable resistance due to snagging (a feeling like your finger is catching) is present.

[0179] <Evaluation criteria for hair manageability after heat treatment> ○ (Good): The hair strands do not spread out from top to bottom, and the entire hair strand is neatly bundled together. × (Defective): The hair strands are clearly spreading out from top to bottom.

[0180] (Test Example 4A: Durability of hair manageability and hair cohesion after heat treatment) After evaluating the "hair manageability after heat treatment" and "hair cohesion after heat treatment" in Test Example 3A above, the hair bundles were left to stand for 5 hours under conditions of 35°C and 80% RH humidity, and then left to stand for another 30 minutes at room temperature (25°C). The hair bundles were visually observed after standing, and the persistence of hair cohesion after heat treatment was determined according to the following criteria. In addition, the manageability of the hair bundles after standing was evaluated when a finger ran through them (the degree of resistance due to snagging), and the persistence of hair manageability after heat treatment was determined according to the following criteria.

[0181] <Evaluation criteria for the persistence of hair smoothness after heat treatment> ○ (Good): There is almost no feeling of resistance due to snagging (a feeling of fingers catching). × (Defective): A noticeable resistance due to snagging (a feeling like your finger is catching) is present.

[0182] <Evaluation criteria for the persistence of hair manageability after heat treatment> ○ (Good): The hair strands do not spread out from top to bottom, and the entire hair strand is neatly bundled together. × (Defective): The hair strands are clearly spreading out from top to bottom.

[0183] [Evaluation of Examples 17, 18 and Comparative Example 5 (Emulsified Hair Cosmetic Composition in Emulsion Form)] (Test Example 2B: Hair feel when applied) Approximately 0.7 g of emulsified hair cosmetic composition was applied evenly to a hair bundle (human hair, 30 cm long, 10 g in weight) by running fingers through it. The ease of handling (the degree of resistance due to friction: the feeling of friction with the hair) after applying the emulsified hair cosmetic composition was evaluated and judged according to the following criteria.

[0184] <Evaluation criteria for hair smoothness during application> ○ (Good): There is almost no feeling of friction with the hair. × (Poor): A noticeable friction sensation against the hair is present.

[0185] (Test Example 3B: Hair manageability and hair cohesion after heat treatment) The hair strands evaluated in Test Example 2B above were dried with a hairdryer. Next, a hair iron (set temperature: 180°C) was passed over the hair strands twice from top to bottom to heat-treat them. The hair strands after heat treatment were visually observed, and the manageability of the hair after heat treatment was judged according to the following criteria. In addition, the ease of running fingers through the hair strands after heat treatment (the degree of resistance due to snagging) was evaluated, and the ease of running fingers through the hair after heat treatment was judged according to the following criteria.

[0186] <Evaluation criteria for hair smoothness after heat treatment> ○ (Good): There is almost no feeling of resistance due to snagging (a feeling of fingers catching). × (Defective): A noticeable resistance due to snagging (a feeling like your finger is catching) is present.

[0187] <Evaluation criteria for hair manageability after heat treatment> ○ (Good): The hair strands do not spread out from top to bottom, and the entire hair strand is neatly bundled together. × (Defective): The hair strands are clearly spreading out from top to bottom.

[0188] (Test Example 4B: Durability of hair manageability and hair cohesion after heat treatment) After evaluating the "hair manageability after heat treatment" and "hair cohesion after heat treatment" in Test Example 3B above, the hair bundles were left to stand for 5 hours under conditions of 35°C and 80% RH humidity, and then left to stand for another 30 minutes at room temperature (25°C). The hair bundles were visually observed after standing, and the persistence of hair cohesion after heat treatment was determined according to the following criteria. In addition, the manageability of the hair bundles after standing was evaluated when a finger ran through them (the degree of resistance due to snagging), and the persistence of hair manageability after heat treatment was determined according to the following criteria.

[0189] <Evaluation criteria for the persistence of hair smoothness after heat treatment> ○ (Good): There is almost no feeling of resistance due to snagging (a feeling of fingers catching). × (Defective): A noticeable resistance due to snagging (a feeling like your finger is catching) is present.

[0190] <Evaluation criteria for the persistence of hair manageability after heat treatment> ○ (Good): The hair strands do not spread out from top to bottom, and the entire hair strand is neatly bundled together. × (Defective): The hair strands are clearly spreading out from top to bottom.

[0191] The composition and results are shown in Tables 1-5 below.

[0192] [Table 1]

[0193] [Table 2]

[0194] [Table 3]

[0195] [Table 4]

[0196] [Table 5]

[0197] Furthermore, in the emulsified hair cosmetic compositions obtained in Examples 1 to 21, even when the same tests as in Test Examples 3A, 3B, 4A, and 4B were performed using strands of curly hair, the cohesion and persistence of the hair strands after heat treatment were good.

Claims

1. An emulsified hair cosmetic composition comprising the following components A, B, C, D, and E. Component A: Levulinic acid Component B: Cationic surfactant Component C: Aliphatic alcohols with 8 to 24 carbon atoms Component D: Silicone compound Ingredient E: Water

2. The emulsified hair cosmetic composition according to claim 1, comprising the following ingredient F. Ingredient F: Ester oil

3. The emulsified hair cosmetic composition according to claim 1 or 2, wherein the component D comprises the following component D1 and / or the following component D2. Component D1: Silicone oil with a viscosity of 10,000 mPa·s or more at 25°C. Component D2: Amino-modified silicone with a viscosity of less than 10,000 mPa·s at 25°C.

4. An emulsified hair cosmetic composition according to claim 1 or 2, comprising the following ingredient G. Component G: A polymer having the structure represented by the following formula (G). 【Chemistry 1】 In the above formula (G), R １ and R ２ Each of these independently represents a linear or branched aliphatic hydrocarbon group having 1 to 4 carbon atoms, or a hydrogen atom, and * represents the bond position.

5. The emulsified hair cosmetic composition according to claim 4, wherein the aforementioned component B contains the following component B1. Component B1: Compound represented by the following formula (B1) R １ -C(=O)-NH-C ３ H ６ -N ＋ (CH ３ ) ３ X － (B1) In the above formula (B1), R １ This represents a linear or branched aliphatic hydrocarbon group having 11 to 21 carbon atoms, X － Cl － or Br － It represents.

6. An emulsified hair cosmetic composition according to claim 1 or 2, comprising the following component H. Ingredient H: Nonionic surfactant

7. The emulsified hair cosmetic composition according to claim 6, wherein the aforementioned component H contains the following component H1. Component H1: Polyglycerol fatty acid ester, in which 2 to 6 fatty acids are ester-bonded to polyglycerol, and the average number of added moles of glycerol is 4 to 12.

8. An emulsified hair cosmetic composition according to claim 1 or 2, comprising the following component I. Component I: Cationic polymer

9. The emulsified hair cosmetic composition according to claim 1 or 2, wherein the pH is 7.0 or less.

10. The emulsified hair cosmetic composition according to claim 1 or 2, which is used after applying it to the hair and then heat-treating the hair at a heat treatment temperature of 90°C or higher.

11. A step of applying the emulsified hair cosmetic composition according to claim 1 or 2 to the hair, A hair treatment method comprising, in this order, a heat treatment step of heating the hair to a heat treatment temperature of 90°C or higher.

12. The hair treatment method according to claim 11, further comprising a washing step of washing off the emulsified hair cosmetic composition applied to the hair between the coating step and the heat treatment step.

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