Hair composition and hair treatment method

Abstract

To provide a hair composition that makes it possible to achieve superior smooth feel in hair when using volatile non-cyclic silicone, and a hair treatment method using the composition.SOLUTION: A hair composition comprises a cationic surfactant, a higher alcohol, a volatile non-cyclic silicone, and a methylpolysiloxane having a kinematic viscosity at 25°C of 5 mm2 / s or more and less than 20 mm2 / s. Also provided is a hair treatment method using the composition.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a hair composition suitable for use as a leave-on oil-in-water emulsion treatment, and to a hair treatment method using the composition. [Background technology]

[0002] Leave-in treatments and rinse-off treatments are known as hair compositions, and leave-in treatments can impart a different feel to hair than rinse-off treatments. Volatile cyclic silicones are known as a common ingredient incorporated into hair compositions, but due to the increasing global demand for cosmetics, there are concerns about their supply. Under these circumstances, there is a need to reduce the amount of volatile cyclic silicone used, and as one response to this, Patent Document 1 discloses a composition incorporating a volatile silicone other than a cyclic silicone. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-122665 Summary of the Invention [Problem to be solved by the invention]

[0004] In the process of investigating the replacement of volatile cyclic silicones with volatile acyclic silicones, the problem of a decrease in the smooth feel of hair treated with the hair composition became apparent. In order to reduce the amount of volatile cyclic silicones used or to find alternatives, it is desirable to propose a technology that improves the smooth feel of hair when volatile acyclic silicones are used.

[0005] In view of the above circumstances, an object of the present invention is to provide a hair composition that gives excellent hair smoothness when a volatile acyclic silicone is used, and a hair treatment method that uses the composition. [Means for solving the problem]

[0006] The present inventors have conducted extensive research into hair compositions containing a volatile acyclic silicone together with a cationic surfactant and a higher alcohol, and have found that the kinematic viscosity at 25°C is 5 mm 2 / s or more 20mm 2 The inventors have found that the incorporation of methylpolysiloxane at less than 1 / s improves the smooth feel of hair, leading to the completion of the present invention. That is, the present invention includes a hair composition and a hair treatment method according to the following items [1] to [7].

[0007] [1] Cationic surfactant, higher alcohol, volatile acyclic silicone, and a kinematic viscosity of 5mm at 25°C 2 / s or more 20mm 2 A hair composition containing a methylpolysiloxane having a kinematic viscosity of less than 1 / s. The kinematic viscosity of the methylpolysiloxane of this embodiment is preferably a value measured in accordance with Method 1 of the Viscosity Measurement Method, General Testing Methods for Cosmetic Raw Materials (the same applies to the kinematic viscosity below).

[0008] [2] The hair composition according to the above [1], wherein the blending amount of the volatile cyclic silicone is less than 5% by mass or no blending is performed. According to [2], the kinematic viscosity at 25°C is 5mm 2 / s or more 20mm 2 Because it contains less than 1 / s of methylpolysiloxane, it prevents the loss of smooth feel on hair that would otherwise occur due to limiting the amount of volatile cyclic silicone or not including said silicone at all.

[0009] [3] The hair composition according to [1] or [2] above, which contains one or more highly polymerized silicones selected from highly polymerized methylpolysiloxanes and highly polymerized dimethiconols. The incorporation of the highly polymerized silicone in [3] not only improves the smooth feel of hair, but also improves the uniformity and softness of hair.

[0010] [4] The hair composition according to any one of [1] to [3] above, which contains a polymer compound. The incorporation of the polymer compound in [4] further improves the smooth feel of hair.

[0011] [5] The hair composition according to [4], wherein the polymer compound is one or more selected from the group consisting of a cationic polymer, polyquaternium-22, polyquaternium-61, and polyquaternium-64. The incorporation of the selected polymer in [5] further improves the smooth feel of hair, as well as the uniform and / or soft feel of hair.

[0012] [6] The hair composition according to [4], wherein the polymer compound is one or more selected from the group consisting of guar hydroxypropyltrimonium, hydroxypropyl guar hydroxypropyltrimonium chloride, polyquaternium-6, polyquaternium-7, polyquaternium-10, polyquaternium-11, polyquaternium-22, polyquaternium-52, polyquaternium-61, polyquaternium-64, and carbomer. The incorporation of the selected polymer in [6] further improves the smooth feel of hair, as well as the uniform and / or soft feel of hair.

[0013] [7] A hair treatment method using the hair composition described in any one of [1] to [6] above. [Effects of the Invention]

[0014] According to the present invention, hair is treated using a hair composition containing a cationic surfactant, a higher alcohol, and a volatile acyclic silicone, as well as a methylpolysiloxane of a predetermined kinematic viscosity, and therefore the hair has an excellent smooth feel. DETAILED DESCRIPTION OF THE INVENTION

[0015] The present invention will be described below based on the embodiments of the present invention. The hair composition according to the present embodiment contains a cationic surfactant, a higher alcohol, a volatile acyclic silicone, and a kinetic viscosity at 25°C of 5mm 2 / s or more 20mm 2 The hair composition according to this embodiment contains a methylpolysiloxane having a viscosity of less than 1 / 2 s, and water (the amount of water is, for example, 60% by mass or more and 90% by mass or less). The hair composition according to this embodiment may also contain, as optional components, components that are contained in known hair compositions.

[0016] (cationic surfactant) The hair composition of the present embodiment contains a cationic surfactant as described above. The cationic surfactant is a component that repairs hair, and when blended with a higher alcohol, it can produce a cream-type composition.

[0017] Examples of the cationic surfactant include known cationic surfactants, such as alkyl quaternary ammonium salts, such as long-chain alkyltrimethyl quaternary ammonium salts, di-long-chain alkyldimethyl quaternary ammonium salts, benzalkonium-type quaternary ammonium salts, and monoalkyl ether-type quaternary ammonium salts; and amine salts, such as alkylamine salts, fatty acid amidoamines, ester-containing tertiary amine salts, and Arcobel-type tertiary amine salts. Among cationic surfactants, long-chain alkyltrimethyl quaternary ammonium salts and di-long-chain alkyldimethyl quaternary ammonium salts are highly versatile. Examples of long-chain alkyltrimethyl quaternary ammonium salts include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, and behenyltrimethylammonium methosulfate. Examples of di-long-chain alkyldimethyl quaternary ammonium salts include dicetyldimethylammonium chloride and distearyldimethylammonium chloride.

[0018] The hair composition of this embodiment may contain one or more cationic surfactants. The amount of cationic surfactant in the composition may be appropriately determined, but is preferably 0.3% by mass to 7% by mass, more preferably 0.5% by mass to 5% by mass, more preferably 0.7% by mass to 3% by mass, and even more preferably 0.7% by mass to 1.5% by mass. A content of 0.3% by mass or more can be expected to make hair feel soft to the touch, and a content of 7% by mass or less is suitable for suppressing skin irritation.

[0019] (higher alcohol) The hair composition of this embodiment contains a higher alcohol as described above. The cationic surfactant exerts a viscosity adjusting effect to improve the viscosity of the composition, and by blending the higher alcohol and the cationic surfactant together, a cream-type composition can be realized.

[0020] The higher alcohol is a monohydric alcohol having 6 or more carbon atoms, and preferably a saturated alcohol having 16 to 22 carbon atoms. Examples of the higher alcohol include known higher alcohols, such as linear saturated alcohols such as lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, arachyl alcohol, and behenyl alcohol; linear unsaturated alcohols such as oleyl alcohol; and branched saturated alcohols such as hexyldecanol, octyldodecanol, isocetyl alcohol, dodecylhexadecanol, isostearyl alcohol, and tetradecyloctadecanol.

[0021] The hair composition of this embodiment may contain one or more higher alcohols. The amount of higher alcohol in the composition may be appropriately determined, but is preferably 0.5% by mass to 10% by mass, more preferably 1.0% by mass to 7% by mass, and even more preferably 1.5% by mass to 5% by mass. A content of 0.5% by mass or more is suitable for increasing the viscosity of the hair composition, while a content of 10% by mass or less is suitable for decreasing the viscosity of the hair composition.

[0022] (volatile acyclic silicone) The hair composition of the present embodiment contains the volatile acyclic silicone as described above. By incorporating this volatile acyclic silicone, it becomes easier to dry the hair to which the hair composition of the present embodiment has been applied.

[0023] The volatile acyclic silicone does not have a cyclic skeleton in its molecular structure, unlike volatile cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. The kinematic viscosity of the volatile acyclic silicone at 25°C is 5mm. 2 / s, and to make drying easier, 3mm 2 / s or less is good, 2mm 2 / s or less is preferable (the lower limit of the kinematic viscosity is set to, for example, 1 mm 2 / s or more is preferable.)

[0024] The volatile acyclic silicone to be blended in the hair composition of this embodiment may be one or more selected from known volatile acyclic silicones. Examples of such volatile acyclic silicones include linear methylpolysiloxanes such as trisiloxane, branched silicones such as methyltrimethicone, and silicones having alkyl groups on their side chains such as ethylmethicone. The amount of volatile acyclic silicone blended in the hair composition of this embodiment is, for example, 0.5% to 20% by mass, 1% to 15% by mass, 2% to 10% by mass, or 3% to 8% by mass.

[0025] (Kinematic viscosity is 5mm 2 / s or more 20mm 2 / s less than methylpolysiloxane) The hair composition of this embodiment has a kinematic viscosity of 5 mm as described above. 2 / s or more 20mm 2 / s (the kinematic viscosity here is the kinematic viscosity at 25°C). By incorporating the methylpolysiloxane, the smooth feel and uniform feel of hair are improved.

[0026] The above kinematic viscosity is 5mm 2 / s or more 20mm 2 The kinematic viscosity of methylpolysiloxane is less than 5mm / s. 2 / s or more 16mm 2 / s or less is better, 5mm 2 / s or more 12mm 2 / s or less is preferable, 5 mm 2 / s or more 8mm 2 / s is more preferable. 2 / s or more 20mm 2 If the viscosity is less than 1 / s, it is suitable for improving the smooth, uniform and soft feel of the hair.

[0027] The above kinematic viscosity is 5mm 2 / s or more 20mm 2 The methyl polysiloxane having a kinematic viscosity of less than 5 mm / s may be one or more types selected from known methyl polysiloxanes. 2 / s, 6mm 2 / s, 10mm 2 The kinematic viscosity of the hair composition of this embodiment is 5 mm / s. 2 / s or more 20mm 2 The amount of methylpolysiloxane blended is less than / s, for example, 0.5% by mass to 20% by mass, 1% by mass to 10% by mass, 2% by mass to 7% by mass, or 3% by mass to 5% by mass.

[0028] (Optional raw materials) The hair composition of this embodiment can contain optional components that are contained in known hair compositions, but due to supply concerns, it is preferable to avoid the use of volatile cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane, or to limit the amount of volatile cyclic silicones contained therein. The amount of volatile cyclic silicone contained in the hair composition of this embodiment is preferably less than 5% by mass, preferably less than 3% by mass, more preferably less than 1% by mass, even more preferably less than 0.1% by mass, and even more preferably less than 0.05% by mass.

[0029] In the hair composition of this embodiment, the incorporation of one or more highly polymerized silicones selected from highly polymerized methylpolysiloxanes and highly polymerized dimethiconols is suitable for improving the smooth feel of hair, the uniform feel of hair, and the soft feel of hair. Highly polymerized methylpolysiloxanes are linear polymers with a siloxane bond backbone and an average degree of polymerization of 650 or more, and highly polymerized dimethiconols are linear polymers with a siloxane bond backbone having a hydroxyl group at its terminal and an average degree of polymerization of 650 or more. The total amount of highly polymerized methylpolysiloxanes and highly polymerized dimethiconols in the hair composition of this embodiment is, for example, 0.3% by mass or more but less than 10% by mass, 0.5% by mass or more but less than 5% by mass, or 1.0% by mass or more but less than 3% by mass.

[0030] The incorporation of a polymeric compound into the hair composition of this embodiment is suitable for improving the smooth feel of hair. It is recommended to incorporate one or more known polymeric compounds into the hair composition of this embodiment. Examples of such polymeric compounds include guar hydroxypropyltrimonium chloride, hydroxypropyl guar hydroxypropyltrimonium chloride, polyquaternium-6, polyquaternium-7, polyquaternium-10, polyquaternium-11, polyquaternium-52, polyquaternium-51, polyquaternium-22, polyquaternium-61, polyquaternium-64, polyquaternium-73, carbomer (acrylates / C10-30 alkyl acrylate) crosspolymer, and hydroxyethyl cellulose. The amount of the polymeric compound in the hair composition of this embodiment is, for example, 0.03% by mass or more and 1.5% by mass or less.

[0031] From the viewpoint of improving the smooth feel of hair and improving the uniformity and / or softness of hair, it is preferable to blend one or more polymer compounds selected from cationic polymers, polyquaternium-22, polyquaternium-61, and polyquaternium-64. In addition, from the viewpoint of improving the smooth feel of hair and improving the uniformity and / or softness of hair, it is also preferable to blend one or more polymer compounds selected from guar hydroxypropyltrimonium, hydroxypropyl guar hydroxypropyltrimonium chloride, polyquaternium-6, polyquaternium-7, polyquaternium-10, polyquaternium-11, polyquaternium-22, polyquaternium-52, polyquaternium-61, polyquaternium-64, and carbomer.

[0032] Other optional ingredients include nonionic surfactants, polyhydric alcohols, sugars, ester oils, fats and oils, fatty acids, hydrocarbons, waxes, silicones (volatile acyclic silicones as mentioned above, kinematic viscosity at 25°C is 5mm 2 / s or more 20mm 2 / s or less), highly polymerized methylpolysiloxanes, highly polymerized dimethiconol), amino acids, animal and plant extracts, microbial-derived substances, inorganic compounds, fragrances, preservatives, sequestering agents, ultraviolet absorbers, etc.

[0033] (Dosage form) The formulation of the hair composition of this embodiment is not particularly limited. When used as a leave-in treatment, a cream-like formulation, which is an oil-in-water emulsion composition, is easy to apply to hair. The viscosity of the composition measured after 60 seconds at 25°C using a Brookfield viscometer is, for example, 7,000 mPa·s or more and 15,000 mPa·s or less.

[0034] (pH) The pH of the hair composition of this embodiment is, for example, 3.0 or more and 5.5 or less.

[0035] (Application) The hair composition of the present embodiment is preferably used as a hair treatment composition in a hair treatment method as a leave-in treatment. When used in this manner, the hair composition of the present embodiment is applied to hair that has been chemically treated (such as by oxidation hair dyeing, bleaching, or straightening) or to hair that has not been chemically treated. For example, the hair composition of the present embodiment is applied to damp hair after wiping off moisture with a towel, and then dried with warm air as necessary. [Example]

[0036] The present invention will be described in detail below based on examples, but the present invention should not be construed as being limited by the descriptions in these examples. Creamy hair compositions of Examples, Comparative Examples, and Reference Examples, which are oil-in-water emulsion compositions, were prepared and evaluated. The details are as follows.

[0037] (Hair composition) As compositions for Examples, Comparative Examples, and Reference Examples, hair compositions were prepared with the ingredients and amounts shown in Tables 1 to 2, 3a, and 3b below. The ingredients used in the preparation were stearyltrimethylammonium chloride, behenyltrimethylammonium methosulfate, cetanol, stearyl alcohol, and a 25°C kinematic viscosity of 2mm. 2 / s, methylpolysiloxane with a kinematic viscosity of 5mm at 25°C 2 / s, methylpolysiloxane with a kinematic viscosity of 20mm at 25°C 2 / s: methylpolysiloxane, decamethylcyclopentasiloxane, highly polymerized methylpolysiloxane, guar hydroxypropyltrimonium chloride-containing product (Toho Chemical Co., Ltd.'s "Catinal CG-100"), polyquaternium-6-containing product (Lubrizol Corp.'s "MERQUAT 100"), polyquaternium-10 (Kao Corp.'s "Poise C-80M"), polyquaternium-11-containing product (ISP Japan Inc.'s "GAFQUAT 755N"), polyquaternium-52-containing product (Kao Corp.'s "SOFCARE KG-101E"), polyquaternium-51-containing product (NOF Corp.'s "Lipidure-PMB (Ph10)"), polyquaternium-22-containing product (Lubrizol Japan Inc.'s "MERQUAT 280NP"). POLYMER), polyquaternium-64-containing product (NOF Corporation's "Lipidure-C"), carbomer (Lubrizol's "Carbopol Ultrez 10 Polymer"), (acrylates / C10-30 alkyl acrylate) crosspolymer (Lubrizol's "PEMULEN TR-1"), hydroxyethyl cellulose (Daicel Milize's "HEC Daicel SE 900"), propylene glycol, phenoxyethanol, isopropyl alcohol, and water.

[0038] (Hair treatment) A hair bundle (about 2 g, about 20 cm long hair bundle taken from a George Mathai long human hair panel hair bundle) was wetted with running water, shampooed and treated, and then thoroughly rinsed with running water. Next, about 0.05 g of any of the compositions of the Examples, Comparative Examples, and Reference Examples was applied to the wet hair bundle after simply wiping off the water with a towel, and the hair bundle was then dried with a hair dryer.

[0039] (evaluation) Five evaluators performed sensory evaluations of "smooth feel of hair," "uniform feel of hair," and "soft feel of hair" on hair strands after processing and drying with a hair dryer. For the evaluation of "smooth feel of hair," the ease of running fingers through the hair strand and the smooth feel of the hair surface were evaluated. For the evaluation of "uniform feel of hair," the uniform feel of the surface from the root to the tip of the hair strand was evaluated. For the evaluation of "soft feel of hair," the soft feel when wrapping the hair strand around the fingers was evaluated. In this evaluation, the evaluators established a standard for the evaluation scale and assigned a five-point scale, with "5 points" being the upper limit for excellent, "2 points" being the standard or equivalent, and "1 point" being inferior to the standard, and the average of the scores was used to evaluate the results.

[0040] The ingredients, blend amounts, and evaluation results of the hair compositions according to Example 1, Comparative Examples 1a and 1b, and a Reference Example are shown in Table 1. The evaluation criteria in Table 1 were set based on Comparative Example 1b.

[0041] [Table 1]

[0042] In Table 1, by comparing Example 1 with Comparative Examples 1a to 1b, the volatile acyclic silicone and the kinematic viscosity of 5 mm 2 / s or more 20mm 2 It can be seen that Example 1, which contained both a methylpolysiloxane having a viscosity of less than 1 / s, and a methylpolysiloxane having a viscosity of less than 1 / s, was superior to Comparative Example 1a in terms of "smooth feel of hair" and "uniform feel of hair," unlike Comparative Example 1b, which did not contain the latter methylpolysiloxane. Furthermore, by comparing Example 1 with the Reference Example, which contained a volatile cyclic silicone, it can be seen that Example 1 was superior to the Reference Example in all evaluation items.

[0043] The ingredients, blend amounts, and evaluation results of the hair compositions of Examples 2a to 2c are shown in Table 2. The evaluation criteria in Table 2 were based on Example 2b.

[0044] [Table 2]

[0045] In Table 2, for Example 2a, the kinematic viscosity is 20 mm 2 Example 2b, which contains an additional methylpolysiloxane of 20 mm / s, is inferior to Example 2a in all evaluation items. 2 / s 5mm 2 / s or more 20mm 2 It can be confirmed that a viscosity of less than / s is preferable in all evaluation items. Furthermore, by comparing Example 2a with Example 2c, it can be confirmed that the blending of highly polymerized silicone is preferable in all evaluation items.

[0046] The ingredients, blend amounts, and evaluation results of the hair compositions of Examples 3a to 3l are shown in Tables 3a to 3b below. The evaluation criteria for Tables 3a to 3b were based on Example 3a.

[0047] [Table 3a]

[0048] [Table 3b]

[0049] In Tables 3a and 3b, by comparing Example 3a with Examples 3b to 3l in which a polymer compound was further blended into Example 3a, it can be confirmed that the blending of a polymer compound is suitable for the evaluation of "smooth feel of hair," "uniform feel of hair," and / or "soft feel of hair."

Claims

1. Cationic surfactant, higher alcohol, volatile acyclic silicone, and a kinematic viscosity at 25°C of 5 mm ２ / s or more 20mm ２ A hair composition containing less than 1 / s of methylpolysiloxane.

2. 2. The hair composition according to claim 1, wherein the amount of volatile cyclic silicone blended is less than 5% by mass or the volatile cyclic silicone is not blended at all.

3. 3. The hair composition according to claim 1, further comprising one or more highly polymerized silicones selected from the group consisting of highly polymerized methylpolysiloxanes and highly polymerized dimethiconols.

4. The hair composition according to claim 3, further comprising a polymer compound.

5. 5. The hair composition according to claim 4, wherein the polymer compound is one or more selected from the group consisting of a cationic polymer, polyquaternium-22, polyquaternium-61, polyquaternium-64, and carbomer.

6. The hair composition according to claim 4, wherein the polymer compound is one or more selected from the group consisting of guar hydroxypropyltrimonium, hydroxypropyl guar hydroxypropyltrimonium chloride, polyquaternium-6, polyquaternium-7, polyquaternium-10, polyquaternium-11, polyquaternium-22, polyquaternium-52, polyquaternium-61, polyquaternium-64, and carbomer.

7. A hair treatment method using the hair composition according to claim 1 or 2.

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