Coacervate amount regulator, fragrance sustainer, fragrance for hair cleansing agent and hair cleansing agent

Abstract

Provided is a coacervate amount regulator having an excellent effect of promoting coacervate formation. [Solution] A coacervate amount adjuster containing at least one compound selected from the group consisting of 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, etc. as an active ingredient.

Description

[Technical field]

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

[0002] Anionic surfactants, which are inexpensive and have excellent foaming and cleaning power, are widely used in shampoos. However, when anionic surfactants are used, the oils in the hair and the sebum in the scalp are washed away excessively, causing the hair to become dry and difficult to comb, resulting in poor feel and finish of the hair during and after washing. Therefore, in order to improve the finger-combing properties and the slipperiness of the foam when washing hair, silicones are blended into shampoos.

[0003] However, in recent years, due to the growing demand for silicone-free shampoos, a technology called coacervation has been attracting attention, 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 foam, without adding silicone.

[0004] In coacervation, an insoluble complex (coacervate) is generally formed during the process of rinsing hair with water after washing with an anionic surfactant and a cationic polymer contained in shampoo. The insoluble complex is adsorbed to the hair surface, reducing friction on the hair surface during washing and rinsing, making it possible to run fingers through the hair smoothly.

[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). In addition, as technologies for controlled release of fragrance components when a detergent is used, there are known 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 about 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 cleanser 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] JP 2013-216639 A [Patent Document 5] Special Publication No. 2023-521940 [Patent Document 6] JP 2022-105163 A [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, the 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 the aroma, such as by improving the persistence of the fragrance, and for hair cleansing agents that use such fragrances and have an excellent feel when used.

[0011] The object of the present invention is to solve the problems associated with the above-mentioned conventional techniques, and specifically to provide a coacervate amount regulator that can effectively promote coacervation simply by adding it to a hair cleanser; an aroma sustainer and fragrance for hair cleansers that can effectively promote coacervation and sustain the aroma in the treated object; and a hair cleansing agent that not only sustains the aroma of the fragrance contained therein, but also improves the condition of washed hair, specifically, by providing excellent effects such as improved finger-combing, reduced squeaking, improved smoothness, and improved moist feeling, thereby improving the 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 sustaining the fragrance of hair after washing, and a method for improving one or more properties selected from the ease of combing hair with fingers, squeaking, 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 more than 200 types of flavor raw materials on coacervation and found that 26 flavor 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 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 as an active ingredient. [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 An aroma sustaining agent comprising at least one compound selected from the group consisting of 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 as an active ingredient. [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 cleanser 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] The hair wash according to [5], containing 0.1% by mass or more and 10% by mass or less of compound (C). [7] A method for adjusting the amount of coacervate generated during hair washing, comprising adding the coacervate amount regulator described in [1] to a hair cleanser at a concentration of 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]. Effect 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 an aroma sustaining agent and a fragrance for a hair cleanser that can effectively promote coacervation and increase the amount of fragrance attached to hair, thereby sustaining the aroma.Furthermore, the present invention provides a hair cleanser that has a large amount of coacervate produced during hair washing, and thus not only sustains the aroma, but also improves the hair washing condition, specifically, improves one or more selected from the ease of combing hair with your fingers, squeaky feeling, smoothness, and moisturized feeling, thereby improving the feel when used. [Brief description 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 PREFERRED EMBODIMENTS

[0017] Preferred embodiments of the present invention will now be described. <1> Coacervate amount regulator, aroma sustainer, method for adjusting coacervate amount, and method for sustaining aroma First, preferred embodiments of the coacervate amount adjusting agent and aroma sustaining agent of the present invention (hereinafter, these are also 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 agents of the present invention include 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"), and cyclohexylidene(phenyl)acetonitrile (hereinafter also referred to as "compound 7"). ), 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"), 3,6-dimethyl-2,4-dihydroxybenzoic acid methyl ester (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 the compound with CAS number 139504-68-0 and is also known as 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 the compound with CAS number 90-17-5 and is sometimes called 2,2,2-trichloro-1-phenylethyl acetate.

[0024] Geraniol (compound 6) is the 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 the compound with CAS number 10461-98-0 and is sometimes called 2-cyclohexylidene-2-phenylacetonitrile.

[0026] l-Menthol (compound 8) is the 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 the compound with CAS number 78-70-6 and is sometimes called 3,7-dimethyl-1,6-octadien-3-ol.

[0028] Dihydromyrcenol (compound 10) is the 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 the 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 the compound with CAS number 28940-11-6.

[0033] Dimethyl-3-cyclohexene-1-carbaldehyde (compound 15) is the 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 the compound with CAS number 33704-61-9.

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

[0037] Methyl 3,6-dimethyl-2,4-dihydroxybenzoate (compound 19) is the 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 the compound with CAS number 3738-00-9.

[0040] Methyl dihydrojasmonate (compound 22) is a compound having a CAS number of 24851-98-7, and may be a cis form, a trans form, 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 the 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 arbitrarily combine the 26 specific compounds. The agent of the present invention is preferably one that contains a compound that has a high coacervate generation amount in Table 2 of the examples described below among the 26 specific compounds, but is not limited thereto, and a desired component can be used for any reason, including fragrance suitability, commercial reasons, and 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. Also, since the coacervate formation ability is not easily improved even if a large amount is added, 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 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.

[0048] In particular, 1-(2-tert-butylcyclohexyloxy)-2-butanol (compound 2) 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.

[0049] In particular, benzyl benzoate (compound 3) is used, for example, in a hair cleanser 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.

[0050] In particular, tricyclodecenyl acetate (compound 4) 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.

[0051] In particular, trichloromethylphenylcarbinyl acetate (compound 5) 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.

[0052] In particular, geraniol (compound 6) is used, for example, in a hair cleanser 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.

[0053] In particular, cyclohexylidene(phenyl)acetonitrile (compound 7) is used, for example, in a hair cleanser 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.

[0054] In particular, l-menthol (compound 8) 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 cleansing agent.

[0055] In particular, linalool (compound 9) is used, for example, in a hair cleanser 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 cleanser 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 cleanser 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 used, for example, in a hair cleanser 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.

[0059] Citronellol (compound 13) is used, for example, in a hair cleanser 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 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.

[0062] β-ionone (compound 16) is used, for example, in a hair cleanser 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 cleansing 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.

[0064] Hexyl acetate (compound 18) is used, for example, in a hair cleanser 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 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 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 cleanser 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 cleanser 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 cleanser 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 cleanser 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. The 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 below, unlike Non-Patent Document 1, the LogKow value of a specific compound does not correlate with the amount of coacervate produced when the specific compound is used, and the fact that the specific compound has an excellent effect as a coacervate production regulator was not anticipated by those skilled in the art. The LogKow value is the common logarithm of the partition coefficient between 1-octanol / water, and is an index of the hydrophobicity of an organic compound. The higher the positive value, the higher the hydrophobicity. The LogKow value of the test substance can be calculated by the "fragment constant" method, which divides the structure into fragments (atoms / functional groups), sums up the values ​​of each atomic group (in some cases, a structural correction factor is used) to obtain an estimated value. In the present invention, the LogKow value calculated by EPI suite, which is one of the physical property estimation software for chemical substances available from the U.S. Environmental Protection Agency (EPA), was used.

[0076] As used herein, the term "persistent fragrance" refers to the fragrance being sustained in a treated object (e.g., hair after washing) treated with the agent of the present invention or a composition containing the same. An example of the manner in which the fragrance is sustained is an embodiment in which the fragrance is sustained by increasing the fragrance intensity. All of the 26 specific compounds related to the agent of the present invention can be used as fragrances or their raw materials (collectively sometimes 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 persistence of the fragrance may be accompanied by, for example, an increase in the amount of fragrance remaining in the treated object.

[0077] The agent of the present invention is preferably used in a personal care composition of the type in which the undiluted solution is applied to a treatment target so that coacervate is generated and then washed off with water, and is preferably used, for example, in hair cleansing agents such as shampoos, hair cosmetics other than hair cleansing agents such as rinses and treatments, and skin cleansing agents. By using the agent of the present invention in such compositions, the coacervate generation promoting effect of the agent of the present invention is exhibited. Among them, hair cleansing agents or other hair cosmetics are preferred in that the effects of improving finger-combing of hair, reducing squeaking, improving smoothness, or improving moisturizing effect due to coacervate can be obtained, and hair cleansing agents are particularly preferred in that these effects are excellent.

[0078] As shown in the examples described below, when the agent of the present invention is added to a cleaning agent 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 may be advertised, publicized, promoted, or sold using phrases such as "adjusts the amount of coacervate," "forms coacervate," "sustains the fragrance," "remains easily in hair," "has a long-lasting fragrance," "adheres to hair in large amounts when used as a cleanser," and the like, and advertising, publicity, promotion, or sale using such 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 hair cleanser is a hair cleanser containing an anionic surfactant (A) and a 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, the fragrance of the washed hair can be sustained or enhanced, and the effects of improving the smoothness of the foam during hair washing, preventing hair from squeaking during rinsing, and improving the ease of running fingers through the hair can be obtained. The above description of the specific compound (C) and the preferred compounds and preferred amounts thereof in the cleansing agent can all be applied to the description of the hair cleansing agent (hereinafter, <3> The same applies to the explanations below regarding "Fragrances for hair cleansers.")

[0081] Examples of the anionic surfactant (A) include one or more selected from alkyl sulfate salts, alkyl ether sulfate salts, polyoxyethylene alkyl ether sulfate salts, sodium polyoxyethylene lauryl ether sulfate, alkyl amide ether sulfate salts, polyoxyethylene amide ether sulfate salts, alkyl ether carboxylate salts, polyoxyethylene alkyl ether carboxylate salts, fatty acid salts, N-acyl amino acid salts, N-acyl-N-alkyl amino acid salts, N-acyl polypeptide salts, alkyl sulfosuccinate salts, salts of alkyl succinate or alkenyl succinate, sulfosuccinate salts, isethionate salts, taurine salts, alkyl benzene sulfonate salts, α-olefin sulfonate salts, alkanesulfonic acid, alkyl phosphate salts, polyoxyethylene alkyl ether phosphate salts, N-coconut oil fatty acid acyl-L-glutamic acid triethanolamine, N-coconut oil fatty acid acyl-L-glutamic acid sodium, sodium coconut oil fatty acid methyl taurate, sodium coconut oil fatty acid ethyl ester sulfonate, and sodium tetradecene sulfonate. Examples of counter ions of these salts include 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 from 0.5 to 300, more preferably from 1 to 150, and even more preferably from 3.3 to 75. This ratio can be used for each specific compound and for all 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, homopolymer of diallyl quaternary ammonium salt, diallyl quaternary ammonium salt-acrylamide copolymer (e.g., dimethyldiallylammonium chloride acrylamide copolymer, etc.), quaternized polyvinylpyrrolidone derivative, polyglycol polyamine condensate, vinylimidazolium trichloride-vinylpyrrolidone copolymer, etc. Polymers, hydroxyethyl cellulose-dimethyl diallyl ammonium chloride copolymers, vinylpyrrolidone-quaternary dimethylaminoethyl methacrylate copolymers, polyvinylpyrrolidone-alkylaminoacrylate copolymers, polyvinylpyrrolidone-alkylaminoacrylate-vinyl caprolactam copolymers, vinylpyrrolidone-methacrylamidopropyl trimethylammonium chloride copolymers, alkylacrylamide-acrylate-alkylaminoalkylacrylamide-polyethylene glycol methacrylate copolymers, adipic acid-dimethylaminohydroxypropyl ethylenetriamine copolymers, polydimethyldimethylenepyrrolidinium chloride copolymers, 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 milliequivalent number 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 from 0.001 to 500, more preferably from 0.001 to 50, more preferably from 0.01 to 10, and even more preferably from 0.02 to 5. This ratio can be used for both individual specific compounds and all of the 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 from 40 to 98% by mass, more preferably from 50 to 95% by mass, and particularly preferably from 60 to 90% by mass.

[0090] Other optional components may be appropriately contained, 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, colorants, etc. The hair cleansing agent of the present invention may or may not contain a silicone compound.

[0091] The pH of the hair cleansing agent 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] In the hair cleansing agent of the present invention, the method of incorporating the specific compound is not particularly limited.For example, if the specific compound of the present invention is oil-soluble, it can be mixed with other oil-soluble components to prepare an oil phase, and then mixed with the aqueous phase to prepare the specific compound.If the specific compound of the present invention is water-soluble, it can be mixed with other water-soluble components and water to prepare an aqueous phase, and then mixed with the oil phase to prepare the specific compound.The mixture may be heated when the oil phase and the aqueous phase are mixed and emulsified.

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

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

[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 shampoo was 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. Polyoxyethylene lauryl ether sodium sulfate and coconut oil fatty acid amidopropyl betaine solution were then mixed in sequence. Finally, the mixture was allowed to stand at room temperature, and the specific compound was added little by little and stirred to prepare a hair shampoo. 2.1 g of the obtained shampoo was diluted with 4.9 g of ion-exchanged water (shampoo concentration was 30% by mass) and thoroughly mixed. After mixing, only the lower coacervate layer was taken out and the 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 raw material (specific compound) and a shampoo containing ion-exchanged water instead of the fragrance raw material (fragrance-free shampoo) were 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 production rate of 300% means that the amount of coacervate in a shampoo using a particular fragrance raw material has increased three-fold.

[0098] [Table 1]

[0099] Using the above method, the coacervate formation rate (%) of 200 types of fragrance raw materials was measured. The formation rates of 26 types of 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] We investigated the correlation between the LogKow value, molecular weight, vapor pressure, and type of functional group specific to each of these fragrance raw materials and the coacervate formation rate (%), but found no correlation. In other words, these 26 fragrance raw materials were discovered for the first time as a result of extensive testing in which they were mixed into shampoo and the amount of coacervate was measured.

[0102] Next, 26 types of fragrance raw materials in Table 2 having a high coacervate formation rate were used to prepare fragrance flavors (Example 1 has a fruity green scent, and Example 2 has a floral marine scent) according to the formulation in Table 3 below.

[0103] [Table 3]

[0104] Shampoos were prepared by blending the fragrance flavors of Examples 1 and 2 at a concentration of 1% by mass with the shampoo composition shown in Table 1. The coacervate formation rate (%) of unscented shampoo using ion-exchanged water instead of the fragrance flavor was measured in the same manner 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 mass % of either of the fragrance flavorings of Examples 1 and 2, the amount of coacervate formed increased by about 2 times.

[0105] [Table 4]

[0106] [2] Finger slipperiness 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 fragrance flavors of Examples 1 and 2. Shampoo 2 was prepared without blending a cationic polymer in order to prevent coacervation.

[0107] [Table 5]

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

[0109] (Sensory evaluation test of hair smoothness when using shampoo) A bundle of black human hair measuring 5 cm wide x 20 cm long was combed with a comb to avoid tangling, and then the black human hair was 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 warm water at 40°C, and shaken up and down 5 times to rinse out 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 moisture of the black human hair was absorbed with a paper towel, and the black human hair was evaluated for finger-combability, squeakiness, smoothness, and moisturizing.

[0110] (Evaluation score) Black human hair was washed and evaluated for ease of running fingers through the hair after rinsing, relief from squeakyness, smoothness, and moisturized feel, and the overall smoothness was evaluated using the following scores. The evaluation was carried out by a panel of 11 people (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: Almost no slipperiness.

[0112] [Table 6]

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

[0114] [3] Evaluation of fragrance durability The duration 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 when using shampoo) A bundle of black human hair measuring 5 cm wide x 20 cm long was combed with a comb to avoid tangling, and then the black human hair was 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 warm water at 40°C, and shaken up and down 5 times to rinse the shampoo out. After shaking 5 times, the black human hair was removed and rinsed with fresh warm water. This was repeated 4 times, and finally the moisture of the black human hair was absorbed with a paper towel, and the fragrance intensity of the black human hair was evaluated after drying naturally.

[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 as fragrance intensity. The results are shown in Table 7.

[0117] (Evaluation score) 3 points: Strong scent. 2 points: Scented. 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 adhesion of the scent to 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 subjected to a sensory evaluation again. It was found that Shampoo 1 had a stronger scent in both cases, and 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, by blending the fragrance of the present invention in a shampoo at 0.1 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 at 0.25 mass%. Coacervation is affected by the amount of anionic surfactant / cationic polymer and the degree of cationization of the cationic polymer, but it was confirmed that adding an excessive amount of fragrance does not affect coacervation. Therefore, it was found that there is a preferred concentration of fragrance in shampoo for improving the feel when washing hair and increasing the persistence of the fragrance through the adhesion of the fragrance by promoting coacervation during washing.

[0122] Formulation examples corresponding to the coacervate amount regulator, fragrance sustainer, fragrance for hair cleansing agent, and hair cleansing agent 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 weight 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 mixed into purified water to prepare the aqueous phase. The aqueous phase was gradually heated, and when it reached about 80°C, (1) and (2) were added and stirred. After that, the liquid temperature was returned to room temperature, and then (5) was added and stirred to prepare Hair Shampoo A. (Formulation 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) 0.5 parts by mass of O-[2-hydroxy-3-(trimethylammonio)propyl]guar gum chloride (4) Sodium chloride 1.0 part 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 weight 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 mixed into purified water to prepare the aqueous phase. The aqueous phase was gradually heated, and when it reached about 80°C, (1) and (2) were added and stirred. After that, the liquid temperature was returned to room temperature, and (5) was added and stirred to prepare Hair Shampoo B. (Formulation Example 2-2: Shampoo B) (1) Polyoxyethylene (2) Sodium lauryl ether sulfate 10.0 parts by mass (2) Lauryl amidopropyl betaine 4.5 parts by mass (3) 0.5 parts by mass of O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride (4) Sodium chloride 1.0 part by mass (5) 0.5 parts by mass of fragrance composition B 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 weight l-Menthol 5 parts by weight 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 mixed into purified water to prepare the aqueous phase. The aqueous phase was gradually heated to about 80°C, and (1) and (2) were added and stirred. After that, the liquid temperature was returned to room temperature, and (5) was added and stirred to prepare Hair Shampoo C. (Formulation Example 3-2: Shampoo C) (1) Polyoxyethylene (2) Sodium lauryl ether sulfate 7.5 parts by mass (2) N-coconut fatty acid acyl-L-glutamic acid triethanolamine 1.5 parts by mass (2) Lauryl amidopropyl betaine 4.5 parts by mass (3) 0.5 parts by mass of O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride (4) Sodium chloride 1.0 part by mass (5) 0.5 parts by mass of fragrance composition C 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 weight 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 mixed into purified water to prepare the aqueous phase. The aqueous phase was gradually heated, and when it reached about 80°C, (1), (2), (3) and (4) were added and stirred. After that, the liquid temperature was returned to room temperature, and (7) was added and stirred to prepare Hair Shampoo D. (Formulation Example 4-2: Shampoo D) (1) Sodium N-coconut oil fatty acid acyl-L-glutamate 5 parts by mass (2) Sodium coconut oil fatty acid ethyl ester sulfonate 3 parts by mass (3) Coconut oil fatty acid amidopropyl betaine 7 parts by mass (4) Polyoxyethylene (2) Sodium lauryl ether sulfate 3 parts by mass (5) Polychlorinated dimethyl dimethylene pyrrolidinium solution 0.2 parts by mass (6) Sodium chloride 1.0 part by mass (7) Fragrance composition D 0.5 part by mass 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 weight 2-Phenylethyl alcohol 30 parts by mass Benzyl acetate 30 parts by weight Total 100 parts by mass According to Formulation Example 5-2, (4), (5), etc. were mixed with purified water to prepare the aqueous phase. The aqueous phase was gradually heated, and when it reached about 80°C, (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. (Formulation Example 5-2: Shampoo E) (1) Sodium tetradecene sulfonate 6.5 parts by mass (2) Sodium coconut oil fatty acid methyl taurate 4 parts by mass (3) Coconut oil fatty acid amidopropyl betaine 5.5 parts by mass (4) 0.5 parts by mass of dimethyldiallylammonium chloride-acrylamide copolymer liquid (5) Sodium chloride 1.0 part by mass (6) Fragrance composition E 0.5 part by mass Purified water remainder Total 100 parts by mass [Industrial Applicability]

[0128] The hair cleansing agent of the present invention is prone to coacervation and can be suitably used as a hair cleansing agent that is effective for improving the squeaky feeling of washed hair, improving the ease of running fingers through the 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. 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 regulator comprising, 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 An aroma sustaining agent comprising, as an active ingredient, at least one compound selected from the group consisting of 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 odor sustaining agent according to claim 2, which sustains the odor by adjusting the amount of coacervate produced.

4. 4. A fragrance for use in a hair cleanser comprising an anionic surfactant and a cationic polymer, the fragrance comprising the fragrance sustaining agent according to claim 2 or 3.

5. A method for adjusting the amount of coacervate generated during hair washing, comprising adding the coacervate amount regulator according to claim 1 to a hair wash agent at a concentration of 0.1% by mass or more and 10% by mass or less.

6. A method for sustaining the fragrance in washed hair, comprising adding the fragrance sustaining agent according to claim 2 or 3 to a hair wash agent at a concentration of 0.1% by mass to 10% by mass.

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