Coacervate amount modifier, fragrance retention agent, fragrance for hair cleansing agent, and hair cleansing agent

Abstract

To provide a coacervate amount modifier having an excellent effect of promoting coacervate formation.SOLUTION: A coacervate amount modifier comprises, as an active ingredient, at least one compound selected from among 4-ethyl-α,α-dimethylbenzenepropanal, 1-(2-tert-butylcyclohexyloxy)-2-butanol, benzyl benzoate, tricyclodecenyl acetate, trichloromethylphenylcarbinyl acetate, geraniol, cyclohexylidene(phenyl)acetonitrile, l-menthol, linalool, dihydromyrcenol, benzyl salicylate, 4-(5,5,6-trimethylbicyclo[2.2.1]heptan-2-yl)cyclohexanol, and the like.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a coacervate amount regulator, a fragrance sustaining agent, a fragrance for a hair wash, and a hair wash. [Background technology]

[0002] Anionic surfactants, which are inexpensive and have excellent foaming and cleansing properties, are widely used in shampoos. However, the use of anionic surfactants can result in excessive washing away of oils from the hair and sebum from the scalp, making the hair dry and difficult to comb, and resulting in poor feel and finish of the hair during and after washing. Therefore, silicones are being added to shampoos to improve the ease of running fingers through the hair and the smoothness of the foam when washing.

[0003] However, in recent years, with the growing demand for silicone-free shampoos, attention has been drawn to a technology called coacervation, which can provide the same feel as when silicone is added, such as the ease of running your fingers through your hair when washing and the smoothness of the lather, without adding silicone.

[0004] In coacervation, an insoluble complex (coacervate) is generally formed between the anionic surfactant and cationic polymer contained in shampoo during rinsing with water after washing. The insoluble complex adsorbs to the hair surface, reducing friction on the hair surface during washing and rinsing, making the hair smooth to run your fingers through.

[0005] In order to adjust coacervation, the following techniques have been developed: a technique that uses a specific cationic polymer (Patent Document 1); a technique that uses a neutral salt of a specific acylamino acid-based anionic surfactant and a specific alkanolamine in combination with a cationic polymer (Patent Document 2); a technique that combines a cationic polymer, an associative thickener, and a polyol in a specific ratio (Patent Document 3); and a technique that uses additives such as alkylene oxide derivatives (Patent Document 4). Furthermore, known technologies for controlled release of fragrance components when a detergent is used include a technology that utilizes core-shell microcapsules (Patent Document 5), a technology that uses ringing gel (Patent Document 6), a technology that uses organopolysiloxane (Patent Document 7), and a technology that utilizes latex particles of a polymer material having a particle size of less than approximately 1 μm (Patent Document 8).

[0006] However, these require special compositions (surfactants, cationic polymers, thickeners, and new additives) and special pretreatments such as microencapsulation, and are not necessarily simple technologies.

[0007] On the other hand, it is known that certain fragrances tend to increase the amount of coacervate produced, and that the fragrance in a hair wash tends to be incorporated into the coacervate, increasing the amount of fragrance adhering to the hair along with the coacervate (Non-Patent Document 1). [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Special Publication No. 2019-536775 [Patent Document 2] Special Publication No. 2020-169128 [Patent Document 3] Special Publication No. 2016-519159 [Patent Document 4] Japanese Patent Application Laid-Open No. 2013-216639 [Patent Document 5] Special Publication No. 2023-521940 [Patent Document 6] Japanese Patent Publication No. 2022-105163 [Patent Document 7] Japanese Patent Application Publication No. 3-157318 [Patent Document 8] Japanese Patent Application Publication No. 6-40863 [Non-patent literature]

[0009] [Non-Patent Document 1] J. Soc. Cosmet Chem. Jpn. 51(4), 311-316, 2017 Summary of the Invention [Problem to be solved by the invention]

[0010] However, in recent years, demand for fragrances has become more diverse, and there is a demand for fragrances that have the ability to adjust the amount of coacervate or the ability to control fragrance, such as by improving the persistence of fragrance, as well as hair cleansing agents that use such fragrances and have an excellent feel when used.

[0011] An object of the present invention is to solve the problems associated with the prior art, and specifically to provide a coacervate amount regulator that can effectively promote coacervation simply by adding it to a hair cleanser; a fragrance sustainer and fragrance for hair cleansers that can effectively promote coacervation and sustain the fragrance in the treated object; and a hair cleanser that not only sustains the fragrance of the fragrance contained therein but also improves the condition of washed hair, specifically by improving the ease of combing hair, reducing squeakyness, improving smoothness, or improving moisturized feeling, resulting in an improved feel when used.

[0012] Another object of the present invention is to provide an effective method for adjusting the amount of coacervate produced during hair washing, a method for maintaining the fragrance of hair after washing, and a method for improving one or more properties selected from the ease of combing hair with fingers, smoothness, smoothness, and moist feeling. [Means for solving the problem]

[0013] The present inventors have discovered that specific flavors promote coacervation, and have arrived at the present invention.

[0014] The present inventors have investigated the effects of over 200 types of fragrance raw materials on coacervation and found that 26 fragrance raw materials particularly increase the amount of coacervate produced. Based on this finding, the present invention provides the following configurations. [1] 4-Ethyl-α,α-dimethylbenzenepropanal, 1-(2-tert-butylcyclohexyloxy)-2-butanol, benzyl benzoate, tricyclodecenyl acetate, trichloromethylphenylcarbinyl acetate, geraniol, cyclohexylidene(phenyl)acetonitrile, l-menthol, linalool, dihydromyrcenol, benzyl salicylate, 4-(5,5,6-trimethylbicyclo[2.2.1]heptan-2-yl)cyclohexanol, citronellol, 7-methyl-2H-1,5-benzodioxepin-3(4H)-one, dimethyl-3-cyclohexene A coacervate amount adjuster containing, as an active ingredient, at least one compound selected from the group consisting of 1-carbaldehyde, β-ionone, 1,1,2,3,3-pentamethyl-6,7-dihydroindan-4(5H)-one, hexyl acetate, methyl 3,6-dimethyl-2,4-dihydroxybenzoate, 2-phenylethyl alcohol, 3a,6,6,9a-tetramethyldodecahydronaphtho[2,1-b]furan, methyl dihydrojasmonate, p-tert-butylcyclohexyl acetate, 2-isobutyl-4-methyltetrahydro-2H-pyran-4-ol, ethylene brassylate, and benzyl acetate. [2] 4-Ethyl-α,α-dimethylbenzenepropanal, 1-(2-tert-butylcyclohexyloxy)-2-butanol, benzyl benzoate, tricyclodecenyl acetate, trichloromethylphenylcarbinyl acetate, geraniol, cyclohexylidene(phenyl)acetonitrile, l-menthol, linalool, dihydromyrcenol, benzyl salicylate, 4-(5,5,6-trimethylbicyclo[2.2.1]heptan-2-yl)cyclohexanol, citronellol, 7-methyl-2H-1,5-benzodioxepin-3(4H)-one, dimethyl-3-cyclo A fragrance sustaining agent containing, as an active ingredient, at least one compound selected from hexene-1-carbaldehyde, β-ionone, 1,1,2,3,3-pentamethyl-6,7-dihydroindan-4(5H)-one, hexyl acetate, methyl 3,6-dimethyl-2,4-dihydroxybenzoate, 2-phenylethyl alcohol, 3a,6,6,9a-tetramethyldodecahydronaphtho[2,1-b]furan, methyl dihydrojasmonate, p-tert-butylcyclohexyl acetate, 2-isobutyl-4-methyltetrahydro-2H-pyran-4-ol, ethylene brassylate, and benzyl acetate. [3] The fragrance sustaining agent according to [2], which sustains the fragrance by adjusting the amount of coacervate produced. [4] A fragrance for use in a hair wash containing an anionic surfactant and a cationic polymer, the fragrance containing the fragrance sustaining agent according to [2] or [3]. [5] an anionic surfactant (A); a cationic polymer (B); 4-Ethyl-α,α-dimethylbenzenepropanal, 1-(2-tert-butylcyclohexyloxy)-2-butanol, benzyl benzoate, tricyclodecenyl acetate, trichloromethylphenylcarbinyl acetate, geraniol, cyclohexylidene(phenyl)acetonitrile, l-menthol, linalool, dihydromyrcenol, benzyl salicylate, 4-(5,5,6-trimethylbicyclo[2.2.1]heptan-2-yl)cyclohexanol, citronellol, 7-methyl-2H-1,5-benzodioxepin-3(4H)-one, dimethyl-3-cyclohexanol and at least one compound (C) selected from the group consisting of xene-1-carbaldehyde, β-ionone, 1,1,2,3,3-pentamethyl-6,7-dihydroindan-4(5H)-one, hexyl acetate, methyl 3,6-dimethyl-2,4-dihydroxybenzoate, 2-phenylethyl alcohol, 3a,6,6,9a-tetramethyldodecahydronaphtho[2,1-b]furan, methyl dihydrojasmonate, p-tert-butylcyclohexyl acetate, 2-isobutyl-4-methyltetrahydro-2H-pyran-4-ol, ethylene brassylate, and benzyl acetate. [6] [7] The hair wash according to [5], containing 0.1% by mass or more and 10% by mass or less of the compound (C). A method for adjusting the amount of coacervate generated during hair washing, comprising adding the coacervate amount regulator according to [1] to a hair wash so that the concentration is 0.1% by mass or more and 10% by mass or less. [8] A method for sustaining the fragrance in washed hair, comprising adding the fragrance sustaining agent according to [2] or [3] to a hair wash at a concentration of 0.1% by mass or more and 10% by mass or less. [9] A method for improving one or more of the following: ease of combing hair, smoothness, smoothness, and moisturizing feeling by washing hair with the hair wash according to [5] or [6]. [Effects of the Invention]

[0015] The present invention provides a coacervate amount regulator that can effectively promote coacervation simply by adding it to a hair cleanser, and a method for adjusting the coacervation amount using the same.The present invention also provides a fragrance sustaining agent and a fragrance for a hair cleanser that can effectively promote coacervation and increase the amount of fragrance attached to hair, thereby prolonging the fragrance.Furthermore, the present invention provides a hair cleanser that produces a large amount of coacervate during hair washing, thereby not only prolonging the fragrance but also improving the hair wash condition, specifically improving one or more aspects selected from finger-combability, squeakyness, smoothness, and moisturized feel, thereby improving the feel when used. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a graph showing the relationship between the content of fragrance in a hair wash and the coacervate formation rate. DETAILED DESCRIPTION OF THE INVENTION

[0017] Preferred embodiments of the present invention will now be described. <1> Coacervate amount adjusting agent, fragrance sustaining agent, method for adjusting coacervate amount, and method for sustaining fragrance First, preferred embodiments of the coacervate amount adjusting agent and aroma sustaining agent of the present invention (hereinafter, these will also be referred to as "agents of the present invention"), as well as the method for adjusting the coacervate amount and the method for sustaining an aroma will be described.

[0018] The agent of the present invention comprises 4-ethyl-α,α-dimethylbenzenepropanal (hereinafter also referred to as "Compound 1"), 1-(2-tert-butylcyclohexyloxy)-2-butanol (hereinafter also referred to as "Compound 2"), benzyl benzoate (hereinafter also referred to as "Compound 3"), tricyclodecenyl acetate (hereinafter also referred to as "Compound 4"), trichloromethylphenylcarbinyl acetate (hereinafter also referred to as "Compound 5"), geraniol (hereinafter also referred to as "Compound 6"), cyclohexylidene(phenyl)acetonitrile (hereinafter also referred to as "Compound 7"), and cyclohexylidene(phenyl)acetonitrile (hereinafter also referred to as "Compound 8"). ), l-menthol (hereinafter also referred to as "Compound 8"), linalool (hereinafter also referred to as "Compound 9"), dihydromyrcenol (hereinafter also referred to as "Compound 10"), benzyl salicylate (hereinafter also referred to as "Compound 11"), 4-(5,5,6-trimethylbicyclo[2.2.1]heptan-2-yl)cyclohexanol (hereinafter also referred to as "Compound 12"), citronellol (hereinafter also referred to as "Compound 13"), 7-methyl-2H-1,5-benzodioxepin-3(4H)-one (hereinafter also referred to as "Compound 14"), dimethyl- 3-Cyclohexene-1-carbaldehyde (hereinafter also referred to as "Compound 15"), β-ionone (hereinafter also referred to as "Compound 16"), 1,1,2,3,3-pentamethyl-6,7-dihydroindan-4(5H)-one (hereinafter also referred to as "Compound 17"), hexyl acetate (hereinafter also referred to as "Compound 18"), methyl 3,6-dimethyl-2,4-dihydroxybenzoate (hereinafter also referred to as "Compound 19"), 2-phenylethyl alcohol (hereinafter also referred to as "Compound 20"), 3a,6,6,9a-tetramethyldodecahydronaphtho[2,1 The active ingredient is at least one compound selected from the group consisting of [-b]furan (hereinafter also referred to as "Compound 21"), methyl dihydrojasmonate (hereinafter also referred to as "Compound 22"), p-tert-butylcyclohexyl acetate (hereinafter also referred to as "Compound 23"), 2-isobutyl-4-methyltetrahydro-2H-pyran-4-ol (hereinafter also referred to as "Compound 24"), ethylene brassylate (hereinafter also referred to as "Compound 25"), and benzyl acetate (hereinafter also referred to as "Compound 26") (hereinafter these are collectively referred to as "Specific Compounds").

[0019] 4-Ethyl-α,α-dimethylbenzenepropanal (compound 1) is a compound with CAS number 67634-15-5.

[0020] 1-(2-tert-butylcyclohexyloxy)-2-butanol (compound 2) is a compound with CAS number 139504-68-0 and is sometimes called 1-[(2-tert-butylcyclohexan-1-yl)oxy]butan-2-ol.

[0021] Benzyl benzoate (compound 3) is a compound with CAS number 120-51-4.

[0022] Tricyclodecenyl acetate (compound 4) is a compound with CAS number 5413-60-5 and is called tricyclo[5.2.1.0(2.6)]dec-3-en-8-yl acetate.

[0023] Trichloromethylphenylcarbinyl acetate (compound 5) is a compound with CAS number 90-17-5 and is sometimes called 2,2,2-trichloro-1-phenylethyl acetate.

[0024] Geraniol (compound 6) is a compound with CAS number 106-24-1 and is sometimes called 3,7-dimethyl-2,6-octadien-1-ol.

[0025] Cyclohexylidene(phenyl)acetonitrile (compound 7) is a compound with CAS number 10461-98-0 and is sometimes called 2-cyclohexylidene-2-phenylacetonitrile.

[0026] l-Menthol (compound 8) is a compound with CAS number 2216-51-5 and is sometimes called (1R,2S,5R)-2-isopropyl-5-methylcyclohexan-1-ol.

[0027] Linalool (compound 9) is a compound with CAS number 78-70-6 and is sometimes called 3,7-dimethyl-1,6-octadien-3-ol.

[0028] Dihydromyrcenol (compound 10) is a compound with CAS number 18479-58-8 and is sometimes called 2,6-dimethyl-7-octen-2-ol.

[0029] Benzyl salicylate (compound 11) is a compound with CAS number 118-58-1.

[0030] 4-(5,5,6-trimethylbicyclo[2.2.1]heptan-2-yl)cyclohexanol (compound 12) is a compound with CAS number 66068-84-6.

[0031] Citronellol (compound 13) is a compound having a CAS number of 106-22-9, and may be in the (+) form, the (-) form, or a mixture thereof.

[0032] 7-Methyl-2H-1,5-benzodioxepin-3(4H)-one (compound 14) is a compound with CAS number 28940-11-6.

[0033] Dimethyl-3-cyclohexene-1-carbaldehyde (compound 15) is a compound with CAS number 27939-60-2.

[0034] β-ionone (compound 16) is a compound with CAS number 14901-07-6.

[0035] 1,1,2,3,3-Pentamethyl-6,7-dihydroindan-4(5H)-one (compound 17) is a compound with CAS number 33704-61-9.

[0036] Hexyl acetate (compound 18) is a compound with CAS number 142-92-7.

[0037] Methyl 3,6-dimethyl-2,4-dihydroxybenzoate (compound 19) is a compound with CAS number 4707-47-5.

[0038] 2-Phenylethyl alcohol (hereinafter also referred to as "compound 20") is a compound with CAS number 60-12-8.

[0039] 3a,6,6,9a-Tetramethyldodecahydronaphtho[2,1-b]furan (compound 21) is a compound with CAS number 3738-00-9.

[0040] Methyl dihydrojasmonate (compound 22) is a compound with CAS number 24851-98-7, and may be a cis-isomer, a trans-isomer, or a mixture thereof.

[0041] p-tert-Butylcyclohexyl acetate (compound 23) is a compound with CAS number 32210-23-4.

[0042] 2-Isobutyl-4-methyltetrahydro-2H-pyran-4-ol (compound 24) is a compound with CAS number 63500-71-0.

[0043] Ethylene brassylate (compound 25) is a compound with CAS number 105-95-3.

[0044] Benzyl acetate (compound 26) is a compound with CAS number 140-11-4.

[0045] The agent of the present invention may contain only one of the 26 specific compounds, or may contain a combination of two or more of them. The agent of the present invention can contain any combination of the 26 specific compounds. It is preferable that the agent of the present invention contains, among the 26 specific compounds, a compound that has a high coacervate formation amount in Table 2 of the Examples described below. However, this is not limited thereto, and desired components can be used for any reason, including fragrance suitability, commercial reasons, or industrial reasons.

[0046] The specific compound is preferably contained in the hair wash at 0.1% by mass or more, more preferably 0.2% by mass or more, and even more preferably 0.25% by mass or more, because it has an excellent effect of promoting coacervate formation. Furthermore, because adding a large amount of the specific compound makes it difficult to improve the coacervate formation ability, the specific compound is preferably contained in an amount of 10% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less.

[0047] In particular, 4-ethyl-α,α-dimethylbenzenepropanal (compound 1) is preferably contained in a hair wash agent in an amount of 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0048] In particular, 1-(2-tert-butylcyclohexyloxy)-2-butanol (compound 2) is preferably contained in a hair wash agent in an amount of 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0049] In particular, benzyl benzoate (compound 3) is preferably contained in a hair wash in an amount of 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0050] In particular, tricyclodecenyl acetate (compound 4) is preferably contained in a hair wash in an amount of 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0051] In particular, trichloromethylphenylcarbinyl acetate (compound 5) is preferably contained in a hair wash in an amount of 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0052] In particular, geraniol (compound 6) is used in an amount of, for example, 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less in a hair wash.

[0053] In particular, cyclohexylidene(phenyl)acetonitrile (compound 7) is preferably contained in a hair wash in an amount of 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0054] In particular, l-menthol (compound 8) is contained in, for example, a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0055] In particular, linalool (compound 9) is used in, for example, a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0056] In particular, dihydromyrcenol (compound 10) is used, for example, in a hair wash agent in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0057] Benzyl salicylate (compound 11) is used, for example, in a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0058] 4-(5,5,6-trimethylbicyclo[2.2.1]heptan-2-yl)cyclohexanol (compound 12) is preferably contained in a hair wash in an amount of 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0059] Citronellol (compound 13) is used, for example, in a hair wash agent in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0060] 7-Methyl-2H-1,5-benzodioxepin-3(4H)-one (compound 14) is used, for example, in a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0061] Dimethyl-3-cyclohexene-1-carbaldehyde (compound 15) is preferably contained in a hair wash in an amount of 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0062] β-ionone (compound 16) is used, for example, in a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0063] 1,1,2,3,3-Pentamethyl-6,7-dihydroindan-4(5H)-one (Compound 17) is used, for example, in a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0064] Hexyl acetate (compound 18) is used, for example, in a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0065] Methyl 3,6-dimethyl-2,4-dihydroxybenzoate (compound 19) is used, for example, in a hair wash agent in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0066] 2-Phenylethyl alcohol (hereinafter also referred to as "compound 20") is used, for example, in a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0067] 3a,6,6,9a-Tetramethyldodecahydronaphtho[2,1-b]furan (compound 21) is used, for example, in a hair wash agent in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0068] Methyl dihydrojasmonate (compound 22) is used, for example, in a hair wash agent in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0069] p-tert-Butylcyclohexyl acetate (compound 23) is used, for example, in a hair wash agent in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0070] 2-Isobutyl-4-methyltetrahydro-2H-pyran-4-ol (compound 24) is used, for example, in a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0071] Ethylene brassylate (compound 25) is used, for example, in a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0072] Benzyl acetate (compound 26) is used, for example, in a hair wash in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

[0073] When the agent of the present invention is used in a cosmetic or skin cleanser other than a hair cleanser, the preferred content of the specific compound in the cosmetic or skin cleanser is the same as the preferred content in the hair cleanser described above.

[0074] As used herein, the term "coacervate" refers to a water-insoluble complex formed between a surfactant and a polymer. This complex may be soluble or insoluble in the undiluted composition. As used herein, the term "adjusting the amount of coacervate" refers to the increase or decrease in the amount of insoluble matter that becomes less soluble when the complex is diluted, causing turbidity.

[0075] As shown in Table 2 in the Examples section below, unlike Non-Patent Document 1, the Log Kow value of a specific compound does not correlate with the amount of coacervate formed when the specific compound is used. The excellent effect of the specific compound as a coacervate formation regulator was previously unforeseen by those skilled in the art. The Log Kow value is the common logarithm of the partition coefficient between 1-octanol and water, and is an index of the hydrophobicity of an organic compound. A larger positive value indicates higher hydrophobicity. The Log Kow value of a test substance can be calculated using the "fragment constant" method, which divides the structure into fragments (atoms / functional groups) and sums the values ​​of each atomic group (sometimes using a structural correction factor) to obtain an estimated value. In this invention, the Log Kow value was calculated using EPI suite, a chemical property estimation software available from the U.S. Environmental Protection Agency (EPA).

[0076] As used herein, the term "persistent fragrance" refers to the fragrance remaining on a treated object (e.g., hair after washing) treated with the agent of the present invention or a composition containing it. An example of the fragrance persistence is when the fragrance is sustained by increasing the fragrance intensity. All 26 specific compounds related to the agent of the present invention can be used as fragrances or their raw materials (sometimes collectively referred to as "fragrance raw materials" in this specification), and the fragrance referred to here may be a fragrance derived from a specific compound, or may be derived from a fragrance other than a specific compound. The fragrance persistence may be, for example, due to an increase in the amount of fragrance remaining on the treated object.

[0077] The agent of the present invention is preferably used in personal care compositions in which the undiluted solution is applied to a target to be treated so as to generate coacervate and then rinsed off with water, and is preferably used, for example, in hair cleansers such as shampoos, hair cosmetics other than hair cleansers such as rinses and treatments, and skin cleansers. By using the agent of the present invention in such compositions, the coacervate generation-promoting effect of the agent of the present invention is exerted. Among these, hair cleansers or other hair cosmetics are preferred because they provide the effects of coacervate, such as improved combability, reduced squeaking, improved smoothness, and improved moisturizing. Hair cleansers are particularly preferred because of their excellent effects.

[0078] As will be shown in the examples described below, when the agent of the present invention is added to a cleanser such as a hair cleanser or a cosmetic, the amount of coacervate produced can be increased, and the intensity of the fragrance can be increased and the fragrance can be made to last longer.

[0079] For example, the agent of the present invention can be advertised, publicized, promoted, or sold using phrases such as "adjusts the amount of coacervate," "forms coacervate," "makes the fragrance last," "easily remains in hair," "has a long-lasting scent," "adheres to hair in large amounts when used in a cleanser," or similar phrases, and advertising, publicity, promotion, or sales using these phrases can be considered as implementing the agent of the present invention.

[0080] <2> Hair cleanser The hair cleanser of the present invention contains an anionic surfactant (A), a cationic polymer (B), and the specific compound (C). The fragrance for a hair cleanser is a hair cleanser containing the anionic surfactant (A) and the cationic polymer (B), and the specific compound (C) is used as a fragrance. As described above, the hair cleanser of the present invention can effectively promote the formation of coacervates during hair washing, and as described above, can not only prolong or enhance the fragrance of washed hair, but also improve the smoothness of foam during hair washing, prevent hair from squeaking during rinsing, and improve the ease of combing hair. The above description of the specific compound (C) and its preferred compounds and preferred amounts in the cleanser can all be applied to the description of the hair cleanser (hereinafter, <3> (The same applies to the explanations below for "Fragrances for hair cleansers").

[0081] Examples of the anionic surfactant (A) include alkyl sulfate salts, alkyl ether sulfates, polyoxyethylene alkyl ether sulfates, polyoxyethylene lauryl ether sodium sulfate, alkyl amide ether sulfates, polyoxyethylene amide ether sulfates, alkyl ether carboxylates, polyoxyethylene alkyl ether carboxylates, fatty acid salts, N-acylamino acid salts, N-acyl-N-alkylamino acid salts, N-acyl polypeptide salts, alkyl sulfosuccinates, salts of alkyl succinates or alkenyl succinates, sulfosuccinates, isethionates, taurines, alkyl benzene sulfonates, α-olefin sulfonates, alkanesulfonic acids, alkyl phosphates, polyoxyethylene alkyl ether phosphates, N-cocoyl acyl-L-glutamic acid triethanolamine, N-cocoyl acyl-L-glutamic acid sodium, sodium coconut oil fatty acid methyl taurate, sodium coconut oil fatty acid ethyl ester sulfonate, and sodium tetradecene sulfonate. Counter ions of these salts include, for example, alkali metal ions, alkaline earth metal ions, ammonium ions, alkanolamine ions, and the like.

[0082] The content of the anionic surfactant (A) in the hair wash is, for example, preferably from 5% by mass to 30% by mass, and more preferably from 10% by mass to 15% by mass.

[0083] The mass ratio ((A) / (C)) of the anionic surfactant (A) to the specific compound (C) is preferably 0.5 to 300, more preferably 1 to 150, and even more preferably 3.3 to 75. This ratio can be used for both individual specific compounds and all of the specific compounds.

[0084] Examples of the cationic polymer (B) include cationic cellulose (e.g., O-[2-hydroxy-3-(trimethylammonio)propyl] hydroxyethyl cellulose chloride, etc.), cationic starch, cationic guar gum (e.g., O-[2-hydroxy-3-(trimethylammonio)propyl] guar gum chloride, etc.), cationic locust bean gum, cationic tara gum, diallyl quaternary ammonium salt homopolymer, diallyl quaternary ammonium salt-acrylamide copolymer (e.g., dimethyldiallylammonium chloride acrylamide copolymer, etc.), quaternized polyvinylpyrrolidone derivative, polyglycol polyamine condensate, vinylimidazolium trichloride-vinylpyrrolidone copolymer, and the like. Polymers, hydroxyethyl cellulose-dimethyldiallylammonium chloride copolymer, vinylpyrrolidone-quaternized dimethylaminoethyl methacrylate copolymer, polyvinylpyrrolidone-alkylaminoacrylate copolymer, polyvinylpyrrolidone-alkylaminoacrylate-vinylcaprolactam copolymer, vinylpyrrolidone-methacrylamidopropyl trimethylammonium chloride copolymer, alkylacrylamide-acrylate-alkylaminoalkylacrylamide-polyethylene glycol methacrylate copolymer, adipic acid-dimethylaminohydroxypropylethylenetriamine copolymer, polydimethyldimethylenepyrrolidinium chloride, etc.

[0085] The degree of cationization of the cationic polymer is, for example, preferably 0.2 to 2.3 meq / g, more preferably 0.5 to 2 meq / g. The degree of cationization of the cationic polymer is a value calculated from the measured value of the N content by the Kjeldahl method or the like. The unit of the degree of cationization, meq / g, indicates the number of milliequivalents of N cationic groups per 1 g of sample.

[0086] The weight average molecular weight of the cationic polymer is preferably in the range of 100,000 to 3,000,000, more preferably 400,000 to 2,500,000, and particularly preferably 500,000 to 2,000,000. The weight average molecular weight of the cationic polymer can be determined in terms of polyethylene glycol using gel permeation chromatography (GPC).

[0087] The content of the cationic polymer (B) in the hair wash is, for example, preferably from 0.01% by mass to 5% by mass, and more preferably from 0.1% by mass to 1% by mass.

[0088] The mass ratio ((B) / (C)) of the cationic polymer (B) to the specific compound (C) is preferably 0.001 to 500, more preferably 0.001 to 50, more preferably 0.01 to 10, and even more preferably 0.02 to 5. This ratio can be used for both individual specific compounds and the entire specific compounds.

[0089] The hair cleansing agent of the present invention usually contains water in addition to the above components (A) to (C). Examples of water include purified water such as distilled water and ion-exchanged water, and tap water. Among these, purified water such as distilled water and ion-exchanged water is preferred. The water content in the hair wash of the present invention is preferably 40 to 98 mass %, more preferably 50 to 95 mass %, and particularly preferably 60 to 90 mass %.

[0090] Other optional components that may be appropriately contained include, for example, fats and oils; hydrocarbon oils; higher alcohols; silicone compounds such as cyclic silicones, dimethylpolysiloxanes, and amino-modified polysiloxanes; ester oils; cationic surfactants; nonionic surfactants; water-soluble polymers other than the cationic polymer (B); solvents; pH adjusters; antioxidants; moisturizers, polysaccharides, amino acids, peptides, fragrances, and colorants. The hair wash composition of the present invention may or may not contain a silicone compound.

[0091] The pH of the hair cleanser of the present invention is not particularly limited, but is preferably 4.5 to 8.0 at 25° C. in the form of an undiluted solution without dilution with water.

[0092] There is no particular limitation on the method for incorporating the specific compound into the hair cleansing agent of the present invention. For example, if the specific compound of the present invention is oil-soluble, it may be prepared by mixing it with other oil-soluble components to prepare an oil phase, and then mixing this with an aqueous phase; if it is water-soluble, it may be prepared by mixing it with other water-soluble components and water to prepare an aqueous phase, and then mixing this with the oil phase. The mixture may be heated during the mixing and emulsification of the oil phase and the aqueous phase.

[0093] <3> Fragrances for hair cleansers The hair wash fragrance of the present invention is a hair wash composition containing the specific compound. The specific compound, its amount, and the hair wash composition may be as described above.

[0094] <4> A method for improving one or more of the following: ease of combing hair, smoothness, smoothness, and moisturizing feeling The method of the present invention for improving one or more of the properties selected from finger-combability, frictionlessness, smoothness, and moisturized feel of hair can be carried out by washing hair with the hair cleanser of the present invention. The above-mentioned explanations regarding the specific compound, its amount, and the hair cleanser can be appropriately adopted. Finger-combability, frictionlessness, smoothness, and moisturized feel of hair can be evaluated, for example, by touching the hair immediately after rinsing. [Example]

[0095] The present invention will be described below based on examples, but the present invention is not limited to the following examples. [1] Measurement of the amount of coacervate produced When diluted, shampoos with high light transmittance produced a low amount of coacervate, while shampoos with low light transmittance produced a high amount of coacervate. A correlation was found between the inverse of the light transmittance of the diluted solution and the amount of coacervate produced. Therefore, the amount of coacervate produced was measured as light transmittance.

[0096] A shampoo was prepared according to the formula shown in Table 1 below. NaCl and guar hydroxypropyltrimonium chloride were mixed with ion-exchanged water, heated to 80°C, and stirred. Sodium polyoxyethylene lauryl ether sulfate and coconut oil fatty acid amidopropyl betaine solution were then added in sequence. Finally, the mixture was allowed to cool to room temperature, and the specific compound was added little by little and stirred to prepare a hair shampoo. 2.1 g of the resulting shampoo was diluted with 4.9 g of ion-exchanged water (to a shampoo concentration of 30% by mass) and mixed thoroughly. After mixing, only the lower coacervate layer was removed and its light transmittance at a wavelength of 550 nm was measured using a spectrophotometer (Shimadzu UV-VIS SPECTROPHOTOMETER). Using this method, the light transmittance of a shampoo containing a fragrance ingredient (specific compound) and a shampoo containing ion-exchanged water instead of the fragrance ingredient (fragrance-free shampoo) was measured, and the coacervate formation rate due to the addition of fragrance was calculated using the following formula.

[0097] Coacervate formation rate (%) = 100 x [Light transmittance of unscented shampoo] ÷ [Light transmittance of shampoo containing fragrance ingredients] According to the above measurements, a 300% production rate means that the amount of coacervate in a shampoo containing a particular fragrance ingredient has increased three-fold.

[0098] [Table 1]

[0099] Using the method described above, the coacervate formation rate (%) of 200 types of fragrance raw materials was measured. The formation rates of 26 fragrance raw materials with particularly high coacervate formation rates are shown in Table 2 below. Table 2 also shows the Log Kow of each compound.

[0100] [Table 2]

[0101] For these fragrance ingredients, we investigated the correlation between the coacervate formation rate (%) and the Log Kow value, molecular weight, vapor pressure, type of functional group, etc. specific to each ingredient, but no correlation was found. In other words, these 26 fragrance ingredients were discovered only after extensive testing in which they were blended into shampoo and the coacervate amount was measured.

[0102] Next, 26 fragrance ingredients in Table 2 with high coacervate formation rates were used to prepare fragrances (Example 1 has a fruity green scent, and Example 2 has a floral marine scent) according to the formulations in Table 3 below.

[0103] [Table 3]

[0104] Shampoos were prepared using the shampoo compositions shown in Table 1, each containing the fragrances of Examples 1 and 2 at a concentration of 1% by mass. The coacervate formation rate (%) was measured for unscented shampoos using ion-exchanged water instead of the fragrances, using the same method as described above (Measurement of the amount of coacervate formed). The results are shown in Table 4. As a result, it was confirmed that by blending 1% by mass of either the fragrance flavoring of Examples 1 or 2, the amount of coacervate produced increased by approximately two times.

[0105] [Table 4]

[0106] [2] Finger smoothness Next, shampoos 1 and 2 were prepared according to the formulations shown in Table 5 below, and the finger smoothness during hair washing was evaluated using the fragrances of Examples 1 and 2. Shampoo 2 was prepared without adding a cationic polymer in order to prevent coacervation.

[0107] [Table 5]

[0108] The finger smoothness during hair washing was evaluated by sensory evaluation according to the following method.

[0109] (Sensory evaluation test of hair smoothness after using shampoo) A strand of black human hair measuring 5 cm wide x 20 cm long was combed to avoid tangling, and then immersed for 5 minutes in a diluted shampoo solution (shampoo concentration 30% by mass) prepared by diluting 9 g of the above shampoo with 21 g of ion-exchanged water. After 5 minutes, the black human hair was removed and immersed in 500 ml of 40°C warm water and shaken up and down five times to rinse away the shampoo. After shaking five times, the black human hair was removed and rinsed with fresh warm water. This was repeated four times, and finally the black human hair was blotted with a paper towel to evaluate the combability, smoothness, smoothness, and moisturized feel of the black human hair.

[0110] (Evaluation score) Black human hair was washed and evaluated for ease of running fingers through the hair after rinsing, reduction in roughness, smoothness, and moisturized feeling, and the overall smoothness was evaluated using the following scores. The evaluation was carried out by 11 panelists (11 women, average age 43), and the average scores are shown in Table 6.

[0111] (Slipperiness evaluation score) 3 points: High slipperiness 2 points: Slippery. 1 point: Slightly slippery. 0 points: Almost no slipperiness.

[0112] [Table 6]

[0113] It was confirmed that the fragrance flavors of Examples 1 and 2 promoted coacervation, thereby improving the smoothness after rinsing and reducing squeaking.

[0114] [3] Evaluation of fragrance durability The persistence of the hair fragrance was evaluated by sensory evaluation, including evaluation of fragrance intensity, according to the following method.

[0115] (Sensory evaluation test of hair scent after using shampoo) A bundle of black human hair measuring 5 cm wide x 20 cm long was combed to avoid tangling, and then immersed in a diluted shampoo solution (shampoo concentration 30% by mass) prepared by diluting 9 g of the above shampoo with 21 g of ion-exchanged water for 5 minutes. After 5 minutes, the black human hair was removed, immersed in 500 ml of 40°C warm water, and shaken up and down 5 times to rinse away the shampoo. After shaking 5 times, the black human hair was removed and rinsed with fresh warm water. This was repeated 4 times, and finally the black human hair was blotted with a paper towel and allowed to air dry, after which the fragrance intensity of the black human hair was evaluated.

[0116] The fragrance intensity was evaluated by 11 panelists (11 women, average age 43) according to the following criteria. The average score was converted into a score representing fragrance intensity. The results are shown in Table 7.

[0117] (Evaluation score) 3 points: Strong scent. 2 points: It smells good. 1 point: Slightly scented. 0: Almost no scent.

[0118] [Table 7]

[0119] It was found that both the fragrance flavorings of Examples 1 and 2 promoted coacervation, thereby improving the retention of the scent on the hair after rinsing and giving off a strong scent. After drying, the black human hair was hung in an odorless room for two hours, and then a sensory evaluation was conducted again. In both cases, Shampoo 1 had a stronger scent, and it was found that coacervation improves the persistence of the scent.

[0120] [4] Fragrance content and coacervation rate Six levels of shampoo were prepared by adjusting the blending amount of the fragrance flavoring of Example 1 to 0.1 mass%, 0.25 mass%, 0.5 mass%, 0.75 mass%, 0.9 mass%, and 1.0 mass% in the formula of Shampoo 1, and the coacervate formation rate (%) was measured in the same manner as above. The results are shown in Figure 1.

[0121] As can be seen from Figure 1, when the fragrance of the present invention was blended in a shampoo at a concentration of 0.1% by mass or more, coacervation by the fragrance was promoted, and the coacervate formation rate increased. Furthermore, it was revealed that the coacervate formation rate was saturated when the fragrance was blended in at 0.25% by mass. Coacervation is affected by the amount of anionic surfactant and cationic polymer, the degree of cationization of the cationic polymer, etc., but it was confirmed that adding an excess amount of fragrance does not affect coacervation. Therefore, it was found that there is a preferred concentration of fragrance in shampoo that promotes coacervation during hair washing, improving the feel when washing hair and increasing the persistence of the fragrance due to the adhesion of the fragrance.

[0122] Formulation examples corresponding to the coacervate amount regulator, fragrance sustaining agent, fragrance for hair wash, and hair wash of the present invention are shown below.

[0123] Prescription example 1 (Formulation Example 1-1: Fragrance Composition A) As fragrance composition A, the following composition was prepared. 4-ethyl-α,α-dimethylbenzenepropanal 10 parts by mass Benzyl benzoate 20 parts by mass 7-methyl-2H-1,5-benzodioxepin-3(4H)-one 5 parts by mass Methyl dihydrojasmonate 65 parts by mass Total 100 parts by mass According to the following formulation example 1-2, (3) and (4) were blended into purified water to form the aqueous phase. The aqueous phase was gradually heated until it reached approximately 80°C, at which point (1) and (2) were added and stirred. After the liquid temperature was returned to room temperature, (5) was added and stirred to prepare hair shampoo A. (Prescription Example 1-2: Shampoo A) (1) Polyoxyethylene (2) Sodium lauryl ether sulfate 10.5 parts by mass (2) Coconut oil fatty acid amidopropyl betaine 4.5 parts by mass (3) O-[2-hydroxy-3-(trimethylammonio)propyl]guar gum chloride 0.5 parts by mass (4) Sodium chloride 1.0 parts by mass (5) 0.5 parts by mass of fragrance composition A Purified water remainder Total 100 parts by mass

[0124] Prescription example 2 (Formulation Example 2-1: Fragrance Composition B) As fragrance composition B, the following composition was prepared. 1-(2-tert-butylcyclohexyloxy)-2-butanol 20 parts by mass Trichloromethylphenylcarbinyl acetate 10 parts by mass Dihydromyrcenol 30 parts by mass Citronellol 30 parts by mass 2-Isobutyl-4-methyltetrahydro-2H-pyran-4-ol 10 parts by mass Total 100 parts by mass According to Formulation Example 2-2, (3) and (4) were blended into purified water to form the aqueous phase. The aqueous phase was gradually heated until it reached approximately 80°C, at which point (1) and (2) were added and stirred. After the liquid temperature was returned to room temperature, (5) was added and stirred to prepare Hair Shampoo B. (Prescription Example 2-2: Shampoo B) (1) Polyoxyethylene (2) Sodium lauryl ether sulfate 10.0 parts by mass (2) Lauryl amide propyl betaine 4.5 parts by mass (3) O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride 0.5 parts by mass (4) Sodium chloride 1.0 part by mass (5) Fragrance composition B 0.5 parts by mass Purified water remainder Total 100 parts by mass

[0125] Prescription example 3 (Formulation Example 3-1: Fragrance Composition C) As fragrance composition C, the following fragrances were used. Benzyl benzoate 10 parts by mass Tricyclodecenyl acetate 10 parts by mass Cyclohexylidene(phenyl)acetonitrile 30 parts by mass Citronellol 30 parts by mass l-Menthol 5 parts by mass Ethylene brassylate 10 parts by mass 1,1,2,3,3-Pentamethyl-6,7-dihydroindan-4(5H)-one 5 parts by mass Total 100 parts by mass According to Formulation Example 3-2, (3) and (4) were blended into purified water to form the aqueous phase. The aqueous phase was gradually heated until it reached approximately 80°C, at which point (1) and (2) were added and stirred. After the liquid temperature was returned to room temperature, (5) was added and stirred to prepare Hair Shampoo C. (Prescription Example 3-2: Shampoo C) (1) Polyoxyethylene (2) Sodium lauryl ether sulfate 7.5 parts by mass (2) N-cocoyl-L-glutamic acid triethanolamine 1.5 parts by mass (2) Lauryl amide propyl betaine 4.5 parts by mass (3) O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride 0.5 parts by mass (4) Sodium chloride 1.0 parts by mass (5) Fragrance composition C 0.5 parts by mass Purified water remainder Total 100 parts by mass

[0126] Prescription example 4 (Formulation Example 4-1: Fragrance Composition D) As fragrance composition D, the following fragrances were used. Geraniol 30 parts by mass Linalool 30 parts by mass Benzyl salicylate 40 parts by mass Total 100 parts by mass According to Formulation Example 4-2, (5) and (6) were blended into purified water to form the aqueous phase. The aqueous phase was gradually heated until it reached approximately 80°C, at which point (1), (2), (3), and (4) were added and stirred. After the liquid temperature was returned to room temperature, (7) was added and stirred to prepare Hair Shampoo D. (Prescription Example 4-2: Shampoo D) (1) Sodium N-coconut oil fatty acid acyl-L-glutamate 5 parts by weight (2) Sodium coconut oil fatty acid ethyl ester sulfonate 3 parts by weight (3) Coconut oil fatty acid amidopropyl betaine 7 parts by weight (4) Polyoxyethylene (2) Sodium lauryl ether sulfate 3 parts by weight (5) Polychlorinated dimethyl dimethylene pyrrolidinium solution 0.2 parts by weight (6) Sodium chloride 1.0 part by weight (7) Fragrance composition D 0.5 parts by weight Purified water remainder Total 100 parts by mass

[0127] Prescription Example 5 (Formulation Example 5-1: Fragrance Composition E) As fragrance composition E, the following fragrances were used. β-ionone 10 parts by mass Hexyl acetate 30 parts by mass 2-phenylethyl alcohol 30 parts by mass Benzyl acetate 30 parts by mass Total 100 parts by mass According to Formulation Example 5-2, (4), (5), etc. were blended with purified water to form the aqueous phase. The aqueous phase was gradually heated until it reached approximately 80°C, at which point (1), (2), and (3) were added and stirred. After the liquid temperature was returned to room temperature, (6) was added and stirred to prepare Hair Shampoo E. (Prescription Example 5-2: Shampoo E) (1) Sodium tetradecene sulfonate 6.5 parts by weight (2) Sodium coconut oil fatty acid methyl taurate 4 parts by weight (3) Coconut oil fatty acid amidopropyl betaine 5.5 parts by weight (4) Dimethyldiallylammonium chloride-acrylamide copolymer solution 0.5 parts by weight (5) Sodium chloride 1.0 part by weight (6) Fragrance composition E 0.5 parts by weight Purified water remainder Total 100 parts by mass [Industrial Applicability]

[0128] The hair cleanser of the present invention is prone to coacervation and can be suitably used as a hair cleanser that is effective for improving the squeaky feeling of washed hair, improving the ease of running fingers through hair, and improving the release of fragrances and the persistence of fragrances. Furthermore, the coacervation amount regulator of the present invention exhibits an excellent effect of increasing the amount of coacervate produced. Furthermore, the fragrance sustaining agent of the present invention effectively maintains the fragrance on hair and the like.

Claims

1. an anionic surfactant (A); a cationic polymer (B); and at least one compound (C) selected from 4-ethyl-α,α-dimethylbenzenepropanal, trichloromethylphenylcarbinyl acetate, cyclohexylidene(phenyl)acetonitrile, 4-(5,5,6-trimethylbicyclo[2.2.1]heptan-2-yl)cyclohexanol, and methyl 3,6-dimethyl-2,4-dihydroxybenzoate.

2. An anionic surfactant (A), a cationic polymer (B); at least one compound (C) selected from 4-ethyl-α,α-dimethylbenzenepropanal, 1-(2-tert-butylcyclohexyloxy)-2-butanol, tricyclodecenyl acetate, trichloromethylphenylcarbinyl acetate, cyclohexylidene(phenyl)acetonitrile, 4-(5,5,6-trimethylbicyclo[2.2.1]heptan-2-yl)cyclohexanol, 7-methyl-2H-1,5-benzodioxepin-3(4H)-one, 1,1,2,3,3-pentamethyl-6,7-dihydroindan-4(5H)-one, and methyl 3,6-dimethyl-2,4-dihydroxybenzoate; A hair wash containing a thickener (D).

3. A hair wash according to claim 1 or 2, wherein the degree of cationization of the cationic polymer is 0.2 to 2.3 meq / g, the mass ratio of the cationic polymer (B) to the compound (C) ((B) / (C)) is 0.001 or more and 500 or less, and the mass ratio of the anionic surfactant (A) to the compound (C) ((A) / (C)) is 0.5 or more and 300 or less.

4. The hair wash according to claim 1 or 2, comprising 0.001% by mass or more and 10% by mass or less of the compound (C).

5. A method for improving one or more of finger-combability, friction, smoothness, and moisturizing feeling of hair by washing hair with the hair wash according to claim 1 or 2.

6. The hair wash according to claim 3, comprising 0.001% by mass or more and 10% by mass or less of the compound (C).

7. A method for improving one or more of finger-combability, friction, smoothness, and moisturizing feeling of hair by washing hair with the hair wash according to claim 6.

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