Hair cosmetics

Abstract

This hair cosmetic provides a smooth application, is non-sticky, provides moisture and manageability, and maintains moisture even when used on hair exposed to high temperature and low humidity environments for extended periods. [Solution] The hair cosmetic of the present invention has (a) a kinematic viscosity of 10,000 mm at 25°C 2 / s or more 100,000mm 2 (b) a silicone oil with a kinematic viscosity of 2 mm² at 25°C 2 / s or more 20mm 2 This is a liquid oily hair cosmetic containing (c) a silicone oil with a viscosity of 0.50 or less, (d) a hydrocarbon oil that is liquid at 25°C, and a higher alcohol. The content of component (a) is 20% by mass or more and 60% by mass or less based on the total mass of the hair cosmetic, the content of component (b) is 30% by mass or more and 70% by mass or less based on the total mass of the hair cosmetic, and the mass ratio of component (a) to component (b) (a) is 0.6 or more and 3 or less.

Description

[Technical Field]

[0001] This invention relates to a liquid oil-based hair cosmetic. [Background technology]

[0002] In recent years, with the growing awareness of hair care, there has been a demand for oil-based hair cosmetics used for treatments such as rinses and hair creams that offer superior conditioning effects, including smoothness, suppleness, and emollient properties. As a result, a variety of hair cosmetics have been developed. In particular, liquid oil-based hair cosmetics such as hair oils are required to replenish oil in the hair and provide shine, smoothness, and flexibility. Traditionally, liquid oil-based hair cosmetics have mainly used ester oils, hydrocarbon oils, and silicone oils. Especially as silicone oils, various types with different structures and molecular weights have been used to provide smoothness and suppleness to the hair during and after use, and to create a light finish. Furthermore, in pursuit of further improvements in usability, the combination of high molecular weight silicones with low molecular weight and volatile silicones has also been attempted.

[0003] For example, Patent Document 1 describes a highly polymerized silicone, a branched fatty acid, and a viscosity of 15 mm at 25°C. 2 Silicone oil with a viscosity of 15 mm² or less at 25°C and / or a viscosity of 15 mm² at 25°C 2A hair cosmetic containing hydrocarbon oils of 1 / s or less is disclosed. The document states that the hair cosmetic with the above composition is less sticky during application, provides a rich coating feel, does not drip easily during use, and spreads remarkably well on the hair during application. Patent Document 2 also discloses a hair cosmetic containing a specific ester compound (a compound in which the carboxyl groups at both ends of an oligomeric ester of dimer acid and dimer ol are esterified with isostearyl alcohol), a high molecular weight silicone, and a volatile oil. The document states that the hair cosmetic with the above composition spreads smoothly during use, has excellent suppleness and lightness in the finish, and has excellent effects in providing moisture, manageability, and shine. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2018-76311 [Patent Document 2] Japanese Patent Publication No. 2007-269726 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] In recent years, saunas have become popular due to increased health consciousness. Sauna rooms are high in temperature and low in humidity, causing significant damage to hair due to heat and dryness. For example, spending long periods in a high-temperature, low-humidity environment reduces the moisture content of hair, making it prone to dryness and frizz. However, none of the aforementioned patent documents focus on hair after spending long periods in high-temperature, low-humidity conditions such as a sauna. Specifically, they have not investigated the effects of providing moisture to hair after a sauna session.

[0006] The present invention aims to provide a liquid oil-based hair cosmetic that spreads smoothly during application, is non-sticky, provides moisture and manageability to the hair, and can provide moisture even when used on hair that has been exposed to high temperature and low humidity environments for a long time. [Means for solving the problem]

[0007] The inventors have found that the above problems can be solved by blending specific components (a) to (d) in specific proportions, and have completed the present invention. That is, the present invention provides a solution where (a) the kinematic viscosity at 25°C is 10,000 mm 2 / s or more 100,000mm 2 (b) a silicone oil with a kinematic viscosity of 2 mm² at 25°C 2 / s or more 20mm 2 The present invention provides a liquid oily hair cosmetic comprising (c) a silicone oil of 1 / s or less, (d) a hydrocarbon oil that is liquid at 25°C, and a higher alcohol having 12 to 24 carbon atoms, wherein the content of component (a) is 20% to 60% by mass relative to the total mass of the hair cosmetic, the content of component (b) is 30% to 70% by mass relative to the total mass of the hair cosmetic, and the mass ratio of component (a) to component (b) (a) is 0.6 to 3. [Effects of the Invention]

[0008] The hair cosmetic of the present invention spreads smoothly during application, is non-sticky, and can provide moisture and manageability to the hair. It can also provide moisture to hair that has been exposed to high temperature and low humidity environments for extended periods. [Modes for carrying out the invention]

[0009] The embodiments of the present invention will be described below, but the present invention is not limited to the embodiments described herein and can be modified in various ways without departing from the spirit of the invention.

[0010] In this specification, a numerical range defined using the symbol "~" shall include the numerical values at both ends (upper limit and lower limit) of "~". For example, "2~5" represents 2 or more and 5 or less. Also, in the numerical ranges described in this specification, the upper limit value or lower limit value of the numerical range can be replaced with the value shown in the examples or a value uniquely derived from the examples.

[0011] The hair cosmetic of the present invention only needs to contain the following components (a), (b), (c), and (d), but may further contain components other than these as long as the object and effect of the present invention are not impaired. Hereinafter, each component will be described.

[0012] 〔Component (a)〕 Component (a) is a silicone oil having a kinematic viscosity at 25°C of 10,OOOmm 2 / s or more and 100,OOOmm 2 / s or less. The hair cosmetic may contain only one kind of component (a) or may contain a combination of two or more kinds. From the viewpoints of imparting a moist feeling to the hair and making it difficult to cause stickiness, the kinematic viscosity of component (a) at 25°C is more preferably 30,OOO~80,OOOmm 2 / s. In this specification, the "kinematic viscosity" is a value measured in accordance with the second method of the Cosmetic Raw Material Standard - Viscosity Measurement Method and is a value measured by a Brookfield viscometer.

[0013] As long as component (a) satisfies the above kinematic viscosity and has a siloxane bond in the main chain, its structure is not particularly limited. Examples of the specific structure of component (a) include dimethylpolysiloxane, dimethiconol, modified silicone, etc. Component (a) may be a commercially available product. Commercially available products of dimethylpolysiloxane include product name: KF96H-50,000 cs (manufactured by Shin-Etsu Chemical Co., Ltd., kinematic viscosity value at 25°C: 50,000mm 2 / s), and product name: KF96H-100,000 cs (manufactured by Shin-Etsu Chemical Co., Ltd., kinematic viscosity value at 25°C: 100,000mm 2Examples include ( / s). Commercially available dimethiconol products include the product name: X-21-5847 (manufactured by Shin-Etsu Chemical Co., Ltd., kinematic viscosity value at 25°C: 22,000 mm 2 / s), and the product name: X-21-5849 (manufactured by Shin-Etsu Chemical Co., Ltd., kinematic viscosity value at 25°C: 100,000 mm 2 / s). Among these, in particular, dimethylpolysiloxane with a kinematic viscosity at 25°C of 30,000 to 80,000 mm 2 / s is particularly preferably used from the viewpoints of imparting a moist feeling to the hair and making it difficult for stickiness to occur.

[0014] The content of component (a) may be 20 to 60% by mass, preferably 25 to 50% by mass, and more preferably 30 to 45% by mass with respect to the total mass of the hair cosmetic. When the content of component (a) is 20% by mass or more, the moist feeling and the ease of being gathered become good. On the other hand, when the content of component (a) is 60% by mass or less, the spreadability of the hair cosmetic becomes good and stickiness is difficult to occur.

[0015] [Component (b)] Component (b) is a silicone oil having a kinematic viscosity at 25°C of 2 mm 2 / s or more and 20 mm 2 / s or less. The hair cosmetic may contain only one kind of component (b) or may contain a combination of two or more kinds. From the viewpoint of making it difficult to cause the gathering and stickiness of the hair, it is preferable that the kinematic viscosity at 25°C is 2 to 6 mm 2 / s.

[0016] As long as component (b) satisfies the above kinematic viscosity, its structure is not particularly limited. Examples of specific structures of component (b) include dimethylpolysiloxane, methylcyclopolysiloxane, etc. Component (b) may be a commercially available product. Commercially available dimethylpolysiloxane products include, for example, the product name: KF96A-6cs (manufactured by Shin-Etsu Chemical Co., Ltd., kinematic viscosity value at 25°C: 6 mm 2 / s), and the product name: KF96A-2cs (manufactured by Shin-Etsu Chemical Co., Ltd., kinematic viscosity value at 25°C: 2 mm 2 / s). Examples of commercially available methylcyclopolysiloxanes include, for example, product name: SH 245 (manufactured by Toray Dow Corning, kinematic viscosity value at 25°C: 4 mm 2 / s). Among these, from the viewpoint of making it difficult to cause the cohesion and greasiness of hair, dimethylpolysiloxane having a kinematic viscosity at 25°C of 2 to 6 mm 2 / s is particularly preferred.

[0017] The content of component (b) may be 30 to 70% by mass, preferably 35 to 65% by mass, more preferably 40 to 60% by mass or more, based on the total mass of the hair cosmetic. When the content of component (b) is 30% by mass or more, the hair cosmetic can better impart a moist feeling to the hair and make it easier to be cohesive. When the content rate of component (b) is 70% by mass or less, it is easier to suppress the greasiness of the hair cosmetic.

[0018] Here, the content mass ratio (b) / (a) of the above-mentioned component (a) and component (b) may be 0.6 to 3, preferably 0.7 to 2, more preferably 0.8 to 1.5. When the content mass ratio (b) / (a) of component (a) and component (b) is within the above range, the low-viscosity component (b) can repair the damaged cuticle due to heat and dryness, and further component (a) adheres uniformly to the hair surface and forms an appropriate film, making it easier to impart a moist feeling to the hair exposed to a high-temperature and low-humidity environment for a long time.

[0019] 〔Component (c)〕 Component (c) is a hydrocarbon oil that is liquid at 25°C. Being liquid at 25°C means that the kinematic viscosity at 25°C is 0.2 mm 2 / s or less. Also, the kinematic viscosity of component (c) at 25°C is usually 0.001 mm 2 / s or more. The hair cosmetic may contain only one kind of component (c) or may contain two or more kinds.

[0020] The structure of component (c) is not particularly limited as long as it is a liquid hydrocarbon oil at 25°C, but it is preferably a linear or branched alkane with 8 to 16 carbon atoms, more preferably 8 to 12 carbon atoms.

[0021] Specific examples of component (c) include decane, dodecane, hexadecane, (C9-12)alkane, isododecane, isohexadecane, liquid paraffin, liquid isoparaffin, light liquid isoparaffin, squalane, and hydrogenated polyisobutene. (C9-12)alkane is a mixture of higher hydrocarbons having 9 to 12 carbon atoms. Among these, decane, dodecane, and (C9-12)alkane are preferred, and (C9-12)alkane is more preferred.

[0022] The content of component (c) is not particularly limited, but is preferably 1 to 30% by mass, more preferably 2 to 20% by mass, and even more preferably 3 to 10% by mass or more, relative to the total mass of the hair cosmetic. When the content of component (c) is 1% by mass or more, the hair cosmetic spreads more easily on the hair. Also, the hair cosmetic becomes less sticky. On the other hand, when the content of component (c) is 30% by mass or less, the amount used on the hair makes it easier to impart moisture and manageability to the hair. Furthermore, when the content of component (c) is 30% by mass or less, the amounts of components (a) and (b) become relatively larger, and when the hair cosmetic is used on hair that has been exposed to a high temperature and low humidity environment for a long time, it can impart even more moisture to the hair.

[0023] [Component (d)] Component (d) is a higher alcohol having 12 to 24 carbon atoms, preferably 14 to 22 carbon atoms. The hair cosmetic may contain only one type of component (d) or two or more types. Component (d) may be a liquid at room temperature or a solid. The number of OH groups in component (d) is not particularly limited, and component (d) may be a polyhydric alcohol of two or more types, but it is preferable that it be a monohydric alcohol from the viewpoint of compatibility with other components. Furthermore, the hydrocarbon group in component (d) may be linear or branched. In addition, the hydrocarbon group may be saturated or unsaturated.

[0024] Specific examples of component (d) include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, cetearyl alcohol, octyldodecanol, isostearyl alcohol, oleyl alcohol, jojoba alcohol, and (C14-C22) alcohol. (C14-C22) alcohol is a mixture of higher alcohols having 14 to 22 carbon atoms. Among these, stearyl alcohol, behenyl alcohol, and (C14-C22) alcohol are preferred, with (C14-C22) alcohol being more preferred.

[0025] The content of component (d) is not particularly limited, but is preferably 0.01 to 1% by mass, more preferably 0.02 to 0.5% by mass, and even more preferably 0.03 to 0.2% by mass or more, relative to the total mass of the hair cosmetic. When the content of component (d) is 0.01% by mass or more, the moist and manageable finish when using the hair cosmetic is good. On the other hand, when the content of component (d) is 1% by mass or less, stickiness is less likely to occur.

[0026] Furthermore, the mass ratio (c) / (d) of component (c) to component (d) described above is not particularly limited, but is preferably 60 to 150, more preferably 80 to 120, and even more preferably 90 to 100. When the mass ratio (c) / (d) of component (c) to component (d) is within the above range, the cosmetic spreads easily on the hair and is less likely to cause stickiness.

[0027] [Other ingredients] The liquid oily hair cosmetic composition of the present invention may further contain components other than those described above (a) to (d), examples of which include ester oils that are liquid at 25°C, N-acyl amino acids or their salts, thickeners, antioxidants, and the like.

[0028] If a hair cosmetic contains ester oil that is liquid at 25°C, it can provide the hair with even more moisture.

[0029] The ester oil in question is preferably a compound obtained by a dehydration reaction between a fatty acid and an alcohol. Specific examples of ester oils that are liquid at 25°C include isopropyl myristate, butyl myristate, isopropyl palmitate, ethyl oleate, ethyl linoleate, isopropyl linoleate, cetyl caprylate, hexyl laurate, decyl myristate, decyl oleate, oleyl oleate, octyldodecyl erucate, isostearyl laurate, isotridecyl myristate, isocetyl myristate, isostearyl myristate, octyl palmitate, isocetyl palmitate, isostearyl palmitate, octyl stearate, isocetyl stearate, isodecyl oleate, 2-octyldodecyl oleate, ethyl isostearate, isopropyl isostearate, cetyl ethylhexanoate, hexyl isostearate, ethylene glycol dioctanoate, ethylene glycol dioleate, and propylene glycol dicaprylate. Di(caprylic / capric acid) propylene glycol, propylene glycol dicaprate, propylene glycol dioleate, neopentyl glycol diheptanoate, neopentyl glycol caprate, neopentyl glycol di2-ethylenehexanoate, glyceryl tricaprylate, glyceryl trioctanoate, glyceryl triisopalmitate, glyceryl triisostearate, trimethylolpropane trioctanoate, triiso Examples include trimethylolpropane stearate, pentaerythristyl tetraoctanoate, 2-octyldodecyl neopentanoate, isocetyl octanoate, isocetyl octanoate, isostearyl octanoate, isononyl isononanoate, 2-hexyldecyl dimethyloctanoate, 2-octyldodecyl dimethyloctanoate, octyl isopalmitate, isocetyl isostearate, isostearyl isostearate, jojoba oil, and jojoba seed oil. Of these, ester oils obtained by reacting a fatty acid with 16 to 24 carbon atoms with a branched higher alcohol with 16 to 24 carbon atoms are particularly preferred.

[0030] The content of the ester oil, which is liquid at 25°C, is not particularly limited, but is preferably 1 to 40% by mass, more preferably 1 to 20% by mass, and even more preferably 1 to 10% by mass, relative to the total mass of the hair cosmetic.

[0031] Furthermore, it is preferable that the hair cosmetic contains N-acyl amino acids or salts thereof. When the hair cosmetic contains N-acyl amino acids or salts thereof, it can provide even more moisture to hair that has been exposed to high temperature and low humidity environments for a long time. In this specification, "N-acyl amino acids or salts thereof" refers to compounds in which an acyl group, preferably a saturated fatty acid having 12 to 20 carbon atoms, is condensed with the amino group of an amino acid, or a salt thereof. Examples of N-acyl amino acids or salts thereof include N-lauroyl sarcosine, N-myristoyl-N-methyl-β-alanine, N-cocoyl glutamic acid, N-stearoyl glutamate disodium, N-lauroyl glutamate sodium, lauroyl aspartate sodium, palmitoyl sarcosinate sodium, palmitoyl glutamate magnesium, and the like.

[0032] The content of N-acyl amino acids or their salts is not particularly limited, but is preferably 0.001 to 0.1% by mass, more preferably 0.005 to 0.05% by mass, and even more preferably 0.008 to 0.03% by mass, relative to the total mass of the hair cosmetic.

[0033] Examples of thickening agents include amino acid derivatives such as N-lauroyl-L-glutamic acid and α,γ-di-n-butylamine; dextrin fatty acid esters such as dextrin palmitate, dextrin stearate, and dextrin 2-ethylhexanoate palmitate; sucrose fatty acid esters such as sucrose palmitate and sucrose stearate; benzylidene derivatives of sorbitol such as monobenzylidene sorbitol and dibenzylidene sorbitol; and organically modified clay minerals such as dimethylbenzylddecylammonium montmorillonite clay and dimethyldioctadecylammonium montmorillonite clay.

[0034] The amount of thickener is not particularly limited, but is preferably 0.001 to 1% by mass, more preferably 0.005 to 0.5% by mass, and even more preferably 0.01 to 0.3% by mass, relative to the total mass of the hair cosmetic.

[0035] Specific examples of antioxidants include dl-α-tocopherol, dibutylhydroxytoluene, and erythorbic acid.

[0036] The antioxidant content is not particularly limited, but is preferably 0.005 to 0.5% by mass, more preferably 0.01 to 0.3% by mass, and even more preferably 0.02 to 0.2% by mass, relative to the total mass of the hair cosmetic.

[0037] The hair cosmetic composition of the present invention may further contain various optional ingredients commonly used in ordinary cosmetics, quasi-drugs, etc., in an appropriate manner, provided that they do not hinder the effects of the present invention. Specifically, these include surfactants (ionic surfactants such as alkyl sulfates, alkyl ether sulfates, fatty acid salts, sulfosuccinates, α-olefin sulfonates, N-acylmethyl taurates, alkyl ether carboxylates, and phosphate esters; imidazoline-based amphoteric surfactants, betaine-based amphoteric surfactants, and nonionic surfactants such as alkyl polyglucosides), polyhydric alcohols, chelating agents, preservatives, fragrances, UV absorbers, moisturizers, physiologically active ingredients, pearlescent agents, anti-inflammatory agents, antibacterial agents, antiperspirants, neutralizing agents, pH adjusters, etc. These can be incorporated depending on the specific use and formulation of the hair cosmetic composition.

[0038] Furthermore, from the viewpoint of long-term stability, the hair cosmetic composition of the present invention preferably has a water content of less than 3% by mass, and more preferably less than 1% by mass.

[0039] [Physical properties and usage methods of hair cosmetics] The hair cosmetic composition of the present invention is a liquid cosmetic composition at room temperature. In this specification, a hair cosmetic composition being liquid at room temperature means that it is fluid at 25°C. The kinematic viscosity of the hair cosmetic composition at 25°C is preferably 50 to 2000 mmHg. 2 / s, more preferably 100~1000mm 2 The kinematic viscosity of the hair cosmetic is within this range, making it easier to apply to the hair. This kinematic viscosity is measured in the same way as the kinematic viscosity of component (A) and component (B) described above.

[0040] The hair cosmetic of the present invention may be applied directly to the hair and scalp, or it may be taken into the palm of the hand first and then spread onto the hair and scalp. From the viewpoint of spreading it evenly throughout the hair, it is preferable to take it into the palm of the hand first and then spread it onto the hair and scalp. The hair cosmetic may also be applied to dry hair, or it may be applied to wet hair and then dried with a hairdryer or the like before use.

[0041] [Method for preparing hair cosmetic products] The method for producing the hair cosmetic composition of the present invention is not particularly limited and can be prepared by conventional methods. For example, one method is to heat and dissolve components (a) to (d), and other components as needed, using a mixer and then mix them. [Examples]

[0042] The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited in any way by these examples.

[0043] [Examples 1-17, Comparative Examples 1-9] Each component was blended in the mass ratios shown in Tables 1 to 3 to prepare the hair cosmetic compositions for Examples 1 to 17 and Comparative Examples 1 to 9. Tables 1 to 3 below show the amount of each component blended so that the total hair composition is 100% by mass. Note that the percentage (mass) is omitted, and only the numerical value representing the blended amount is shown.

[0044] 〔evaluation〕 Each hair cosmetic product was evaluated using the following evaluation methods 1 and 2.

[0045] • Evaluation Method 1 Twenty women (ages 24-59) participated as panelists. They washed their hair with commercially available shampoo and rinsed it with water at approximately 40°C. After towel-drying, they applied 2g of each hair cosmetic product to their damp hair, spreading it evenly. Then, they dried their hair with a hairdryer. The following evaluation criteria were used to assess (1) how easily the hair could be spread on the hair during application, and (2) the moisturizing effect, (3) manageability, and (4) the lack of stickiness of the hair after drying with a hairdryer. The total scores from the 20 participants were calculated and judged according to the following criteria.

[0046] (1) Spreading on the hair <Evaluation Criteria> 2. If the hair cosmetic product feels smooth and very slippery during application. 1 point: If the hair cosmetic product feels slightly smooth and slippery during application. 0 points: If you feel that the hair cosmetic product does not glide smoothly during application and is not sufficiently smooth.

[0047] <Judgment criteria> ◎: Total score of 35 points or higher; hair cosmetic product that spreads well during application. ○: Total score is 30 points or higher and 34 points or lower; hair cosmetic product that spreads fairly well during application. △: Total score is 29 points or less; hair cosmetic product does not spread well during application.

[0048] (2) Moisturizing <Evaluation Criteria> 2. If you don't feel any dryness or frizz in your hair after it dries. 1. If your hair doesn't feel dry after drying. 0 points: If you feel dryness or frizziness in your hair after drying.

[0049] <Judgment criteria> ◎: Total score of 35 points or higher; hair cosmetic that leaves hair feeling moisturized after drying. ○: Total score of 30 points or more, and 34 points or less; hair cosmetic that leaves hair feeling slightly moisturized after drying. △: Total score is 29 points or less; hair cosmetic that does not leave hair feeling moisturized after drying.

[0050] (3) Ease of organization <Evaluation Criteria> 2 points: If you feel that your hair is not frizzy after drying and is manageable all the way to the ends. 1 point: If you feel that the frizziness of your hair is reduced after drying and that it is somewhat more manageable all the way to the ends. 0 points: Hair appears frizzy after drying, and the ends lack manageability.

[0051] <Judgment criteria> ◎: Total score of 35 points or higher; hair cosmetic that makes hair easy to manage after drying. ○: Total score of 30 points or more, and 34 points or less; hair cosmetic that makes hair slightly easier to manage after drying. △: Total score of 29 points or less; hair cosmetic that leaves hair difficult to manage after drying.

[0052] (4) Non-sticky <Evaluation Criteria> 2. If your hair feels completely free of oiliness after drying. 1. If your hair doesn't feel oily after drying. 0 points: If you feel your hair is slightly oily after drying.

[0053] <Judgment criteria> ◎: Total score of 35 points or higher; hair cosmetic that leaves hair non-greasy after drying. ○: Total score between 30 and 34 points; hair cosmetic with slightly better non-greasy feel after drying. △: Total score is 29 points or less; hair cosmetic product leaves hair feeling sticky after drying.

[0054] • Evaluation Method 2 Twenty women (ages 24-59) participated as panelists. They washed their hair with commercially available shampoo and rinsed it with water at approximately 40°C. They then spent 10 minutes in a room at 80°C and 10% humidity, followed by 10 minutes in a room at 25°C. This constituted one set, and three sets were performed. After three sets, they rinsed their hair with 40°C water again, towel-dried it, and applied 2g of each hair cosmetic product to their damp hair, spreading it evenly. They then dried their hair with a hairdryer. The moisture level of the hair after drying was evaluated according to the following criteria. The total scores from the 20 participants were calculated and judged according to the following criteria.

[0055] (5) How moisturizing effect the hair feels when used on hair that has been exposed to high temperature and low humidity for a long period of time. <Evaluation Criteria> 2. If you don't feel any dryness or frizz in your hair after it dries. 1. If your hair doesn't feel dry after drying. 0 points: If you feel dryness or frizziness in your hair after drying.

[0056] <Judgment criteria> ◎: Total score of 35 points or higher; hair cosmetic that leaves hair feeling moisturized after being exposed to high temperature and low humidity for a long period of time. ○: Total score of 30 points or more and 34 points or less; hair cosmetic that leaves hair slightly moisturized when used on hair that has been exposed to high temperature and low humidity for a long period of time. △: Total score of 29 points or less; hair cosmetic that does not leave hair feeling moisturized when used on hair that has been exposed to high temperature and low humidity for a long period of time.

[0057] [Table 1]

[0058] [Table 2]

[0059] [Table 3]

[0060] As shown in Tables 1 to 3, each of the hair cosmetic products in Examples 1 to 17 exhibited excellent spreadability during application, a moist finish, and a non-sticky feel. Furthermore, they provided a moisturizing effect even when used on hair exposed to high temperatures and low humidity for extended periods.

[0061] On the other hand, none of the comparative examples 1 to 9 received a score of "○" or higher in all evaluations. Specifically, in comparative example 1, which used polydimethylsiloxane (component (a')) with a lower kinematic viscosity than component (a), and in comparative example 4, which contained a smaller amount of component (a), the moisturizing effect, manageability, and moisturizing effect when used on hair exposed to high temperature and low humidity for a long period of time were insufficient.

[0062] In Comparative Examples 2 and 3, which used polydimethylsiloxane (component (a')) with a higher kinematic viscosity than component (a), the spreadability on the hair, lack of stickiness, and moisturizing effect when used on hair exposed to high temperature and low humidity for extended periods were insufficient.

[0063] In Comparative Example 5, which used polydimethylsiloxane (component (b')) with a lower kinematic viscosity than component (b), the moisturizing effect, manageability, and moisturizing effect when used on hair exposed to high temperature and low humidity for extended periods were insufficient.

[0064] Comparative Example 6, which used polydimethylsiloxane (component (b')) with a higher kinematic viscosity than component (b), and Comparative Example 7, in which the ratio of component (b) to component (a) ((b) / (a)) was less than 0.6, showed insufficient spreadability on hair, manageability, lack of stickiness, and moisturizing effect when used on hair exposed to high temperature and low humidity for extended periods.

[0065] In Comparative Example 8, which did not contain ingredient (c), the spreadability on the hair and the lack of stickiness were insufficient.

[0066] In Comparative Example 9, which did not contain ingredient (d), the moisturizing effect, manageability, and moisturizing effect when used on hair exposed to high temperature and low humidity for a long period of time were insufficient. [Industrial applicability]

[0067] The present invention provides a hair cosmetic that offers excellent spreadability during application, a moist finish, and non-stickiness, and that can provide moisture even when used on hair exposed to high temperatures and low humidity for extended periods. Therefore, this hair cosmetic is extremely useful.

Claims

1. (a) Kinematic viscosity at 25°C is 10,000 mm ２ / s or more 100,000mm ２ Silicone oils with a viscosity of / s or less, (b) kinematic viscosity at 25°C is 2 mm ２ / s or more 20mm ２ Silicone oils with a viscosity of / s or less, (c) A hydrocarbon oil that is liquid at 25°C, (d) A higher alcohol having 12 or more carbon atoms and 24 or fewer carbon atoms, It is a liquid oil-based hair cosmetic containing, The content of component (a) is 20% by mass or more and 60% by mass or less with respect to the total mass of the hair cosmetic composition. The content of component (b) is 30% by mass or more and 70% by mass or less with respect to the total mass of the hair cosmetic composition. The mass ratio of the content of component (a) and component (b) (b) / (a) is 0.6 or more and 3 or less. Hair cosmetic.

2. The hair cosmetic composition according to claim 1, wherein component (c) is a linear or branched alkane having 8 to 16 carbon atoms.

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