Composition and hair treatment method

Abstract

To provide a composition with resistance to a time-dependent decrease in pH, and a hair treatment method using the composition.SOLUTION: A composition comprises a silicate mineral and / or diatomaceous earth, a higher alcohol, a cationic surfactant, and water. A hair treatment method uses a composition comprising a silicate mineral and / or diatomaceous earth, a higher alcohol, a cationic surfactant, and water.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a composition suitable for hair treatment and a hair treatment method using the composition.

Background Art

[0002] Compositions containing higher alcohols and cationic surfactants are widely used in hair treatment applications, and many proposals have been made (see, for example, Patent Document 1 and Patent Document 2). In such compositions, components suitable for the intended use of the hair are formulated, and there is a pH range suitable for the use or component. For example, basic dyes are said to be effective for dyeing properties at a pH from weakly acidic to alkaline.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, depending on the components to be formulated, the pH of the composition may decrease, and it is desired to provide a technique for suppressing or delaying the decrease in pH over time in the composition.

[0005] In view of the above circumstances, an object of the present invention is to provide a composition in which a decrease in pH over time is difficult to progress, and a hair treatment method using the composition.

Means for Solving the Problems

[0006] The inventors of the present invention have conducted intensive studies based on the finding that in a composition containing a higher alcohol and a cationic surfactant, which are general-purpose in hair applications, there is a problem that the pH decreases over time. As a result, they have found that if a silicate mineral or diatomaceous earth is blended, the decrease in pH can be suppressed or delayed, and thus the present invention has been completed.

[0007] That is, the present invention includes the following [1] to [8]. [1] A composition containing a silicate mineral and / or diatomaceous earth, a higher alcohol, a cationic surfactant, and water.

[0008] [2] The composition according to [1], wherein the pH is 6.5 or higher.

[0009] [3] The composition according to [1] or [2], which is used for applications such as a hair care agent, a coloring agent, a bleaching agent, or a styling agent.

[0010] [4] The composition according to any one of [1] to [3], wherein talc is blended as the silicate mineral.

[0011] [5] The composition according to [4], wherein the blending amount of the talc is 0.3% by mass or more.

[0012] [6] The composition according to any one of [1] to [5], wherein one or more selected from ester oils, fats and oils, and nonionic surfactants are blended.

[0013] [7] The composition according to [6], wherein the total blending amount of the ester oil and the fats and oils is 0.5% by mass or more, and / or the blending amount of the nonionic surfactant is 0.1% by mass or more.

[0014] [8] A hair treatment method using the composition according to any one of [3] to [7].

Advantages of the Invention

[0015] According to the composition of the invention [1], the decrease in pH due to the blending of higher alcohols and cationic surfactants can be suppressed or delayed by the blending of silicate minerals and / or diatomaceous earth.

[0016] According to the composition of the invention [2], it is suitable for blending components that require the pH to be 6.5 or higher.

[0017] According to the composition of the invention [3], various hair treatments can be performed.

[0018] According to the composition of the invention [4], it is excellent in suppressing or delaying the decrease in pH due to the blending of talc.

[0019] According to the composition of the invention [5], it is excellent in suppressing or delaying the decrease in pH with a talc blending amount of a predetermined amount or more.

[0020] According to the composition of the invention [6], the decrease in pH that is more likely to proceed with the blending of ester oil, fats and oils, or nonionic surfactant can be suppressed or delayed by the blending of silicate minerals and / or diatomaceous earth.

[0021] According to the composition of the invention [7], the decrease in pH that is more likely to proceed when a predetermined amount or more of ester oil, fats and oils, and / or nonionic surfactant is blended can be suppressed or delayed by the blending of silicate minerals and / or diatomaceous earth.

[0022] According to the hair treatment method of the invention [8], hair can be treated with a composition in which the decrease in pH is suppressed or delayed by the blending of silicate minerals and / or diatomaceous earth.

Mode for Carrying Out the Invention

[0023] Based on the embodiments of the present invention, the present invention will be described below. The composition of the present embodiment is suitable for use in hair treatment, and is formulated with a silicate mineral and / or diatomaceous earth, a higher alcohol, a cationic surfactant, and water (the amount of water added is, for example, 60% by mass or more). Known raw materials formulated in known hair treatment agents may be further added to this composition as optional raw materials.

[0024] (Silicate mineral and / or diatomaceous earth) In the composition of the present embodiment, if a silicate mineral, diatomaceous earth, or both a silicate mineral and diatomaceous earth are formulated, a decrease in pH can be suppressed or delayed. Further, by this formulation, the hair treated with the composition of the present embodiment will be excellent in the feeling of thickness and the uniformity of the surface.

[0025] The total amount of the silicate mineral and diatomaceous earth in the composition of the present embodiment is preferably 0.3% by mass or more and 10% by mass or less, more preferably 0.6% by mass or more and 7% by mass or less, still more preferably 1.0% by mass or more and 5% by mass or less, and even more preferably 1.5% by mass or more and 3% by mass or less. When the total amount is 0.3% by mass or more, it is suitable for suppressing or delaying a decrease in pH, and when it is 10% by mass or less, it is easier to set the dosage form into a cream form.

[0026] The above silicate mineral is a powder obtained by pulverizing a clay mineral, and examples thereof include magnesium silicate such as talc, aluminum silicate such as kaolin, and potassium aluminum silicate such as mica and sericite. Talc is suitable for suppressing or delaying a decrease in pH and is suitable for imparting a thick feeling to the hair and a uniform surface.

[0027] When adding silicate minerals to the composition of this embodiment, it is advisable to add one or more silicate minerals. The amount of silicate minerals added to the composition of this embodiment is preferably 0.3% by mass or more and 10% by mass or less, more preferably 0.6% by mass or more and 7% by mass or less, even more preferably 1.0% by mass or more and 5% by mass or less, and still more preferably 1.5% by mass or more and 3% by mass or less. When the total added amount is 0.3% by mass or more, it is suitable for suppressing or delaying the pH decrease. When it is 10% by mass or less, it is easier to set the dosage form into a cream shape. Also, when adding talc to the composition of this embodiment, the added amount is preferably 0.3% by mass or more and 10% by mass or less, more preferably 0.6% by mass or more and 7% by mass or less, even more preferably 1.0% by mass or more and 5% by mass or less, and still more preferably 1.5% by mass or more and 3% by mass or less. When the added amount is 0.3% by mass or more, it is suitable for suppressing or delaying the pH decrease. When it is 10% by mass or less, it is easier to set the dosage form into a cream shape.

[0028] The above diatomaceous earth is a powder of a natural mineral mainly composed of silicon dioxide. When adding diatomaceous earth to the composition of this embodiment, the added amount is preferably 0.3% by mass or more and 10% by mass or less, more preferably 0.6% by mass or more and 7% by mass or less, even more preferably 1.0% by mass or more and 5% by mass or less, and still more preferably 1.5% by mass or more and 3% by mass or less. When the added amount is 0.3% by mass or more, it is suitable for suppressing or delaying the pH decrease. When it is 10% by mass or less, it is easier to set the dosage form into a cream shape.

[0029] (Higher alcohol) The higher alcohol in this embodiment is a monohydric alcohol having 6 or more carbon atoms, and a saturated alcohol having 16 or more and 22 or less carbon atoms is preferable. It is advisable to add one or more higher alcohols to the composition of this embodiment. The added amount of the higher alcohol is appropriately set, but it is preferably 3% by mass or more and 20% by mass or less, more preferably 5% by mass or more and 15% by mass or less, and even more preferably 7% by mass or more and 13% by mass or less. When the added amount is 3% by mass or more, it is suitable for increasing the viscosity of the composition. When it is 20% by mass or less, it is suitable for decreasing the viscosity of the composition.

[0030] Examples of the higher alcohol include 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 hexyl decanol, octyl dodecanol, isocetyl alcohol, dodecyl hexadecanol, isostearyl alcohol, and tetradecyl octadecanol.

[0031] (Cationic surfactant) One or more cationic surfactants are preferably blended in the composition of the present embodiment. The blending amount of the cationic surfactant in the composition is appropriately set, but is preferably 0.5% by mass or more and 10% by mass or less, more preferably 1.0% by mass or more and 7% by mass or less, and still more preferably 1.5% by mass or more and 4% by mass or less. When the blending amount is 0.5% by mass or more, a soft feeling can be expected for the hair, and when it is 10% by mass or less, it is suitable for suppressing irritation to the skin.

[0032] Examples of the cationic surfactant include alkyl quaternary ammonium salts such as long-chain alkyltrimethyl quaternary ammonium salts, dialkyl dimethyl quaternary ammonium salts, benzalkonium-type quaternary ammonium salts, and monoalkyl ether-type quaternary ammonium salts; and amine salts such as alkylamine salts, fatty acid amide amines, ester-containing tertiary amine salts, and arcobel-type tertiary amine salts. Long-chain alkyltrimethyl quaternary ammonium salts and dialkyl dimethyl quaternary ammonium salts are highly versatile among cationic surfactants. Examples of the long-chain alkyltrimethyl quaternary ammonium salt include lauryl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, and behenyl trimethyl ammonium methosulfate. Examples of the dialkyl dimethyl quaternary ammonium salt include dicetyl dimethyl ammonium chloride and distearyl dimethyl ammonium chloride.

[0033] (Optional raw material) As described above, the raw materials contained in known hair treatment agents may be incorporated into the composition of the present embodiment as optional raw materials. Examples of such optional raw materials include ester oils, fats and oils, nonionic surfactants, anionic surfactants, amphoteric surfactants, polyhydric alcohols, saccharides, fatty acids, hydrocarbons, waxes, silicones, high molecular compounds, amino acids, animal and plant extracts, microbe-derived substances, fragrances, and ultraviolet absorbers.

[0034] When one or more selected from ester oils, fats and oils, and nonionic surfactants are incorporated, the pH decreases with time in the same manner as when a higher alcohol and a cationic surfactant are incorporated. However, the incorporation of a silicate mineral or diatomaceous earth suppresses or delays such a decrease in pH.

[0035] When an ester oil, a fat and oil, or both an ester oil and a fat and oil are incorporated, the total incorporation amount of the ester oil and the fat and oil in the composition of the present embodiment is preferably 0.5% by mass or more and 20% by mass or less, more preferably 1.0% by mass or more and 10% by mass or less, still more preferably 1.5% by mass or more and 8% by mass or less, and even more preferably 2.0% by mass or more and 5% by mass or less. When the incorporation amount is 0.5% by mass or more, it is suitable for imparting a feel to the hair by the ester oil or the fat and oil. When it is 20% by mass or less, it is suitable for suppressing excessive feel imparted to the hair.

[0036] The above ester oil is an ester obtained by synthesis, and it is preferable to incorporate one or more ester oils into the composition of the present embodiment. The incorporation amount of the ester oil in the composition of the present embodiment is preferably 0.5% by mass or more and 20% by mass or less, more preferably 1.0% by mass or more and 10% by mass or less, still more preferably 1.5% by mass or more and 8% by mass or less, and even more preferably 2.0% by mass or more and 5% by mass or less. When the incorporation amount is 0.5% by mass or more, it is suitable for imparting a feel to the hair by the ester oil. When it is 20% by mass or less, it is suitable for suppressing excessive feel imparted to the hair.

[0037] Examples of the ester oil include esters of branched fatty acids and branched higher alcohols, esters of branched fatty acids and straight-chain higher alcohols, esters of straight-chain fatty acids and branched higher alcohols, esters of straight-chain fatty acids and straight-chain higher alcohols, and esters of straight-chain fatty acids and lower alcohols. Here, the "branched fatty acid" for forming the ester means a branched saturated fatty acid having 6 or more carbon atoms and corresponding to a monocarboxylic acid, the "straight-chain fatty acid" means a straight-chain saturated fatty acid having 6 or more carbon atoms and corresponding to a monocarboxylic acid, the "branched higher alcohol" means a branched saturated alcohol having 6 or more carbon atoms and corresponding to a monohydric alcohol, the "straight-chain higher alcohol" means a straight-chain saturated alcohol having 6 or more carbon atoms and corresponding to a monohydric alcohol, and the "lower alcohol" means a straight-chain or branched saturated alcohol having 5 or less carbon atoms and corresponding to a monohydric alcohol.

[0038] Examples of the ester of the branched fatty acid and the branched higher alcohol include isocetyl 2-ethylhexanoate, isostearyl 2-ethylhexanoate, isononyl isononanoate, 2-hexyldecyl dimethyloctanoate, 2-octyldodecyl dimethyloctanoate, 2-ethylhexyl isopalmitate, isocetyl isostearate, and isostearyl isostearate. Examples of the ester of the branched fatty acid and the linear higher alcohol include cetyl 2-ethylhexanoate and hexyl isostearate. Examples of the ester of the branched fatty acid and the lower alcohol include ethyl isostearate and isopropyl isostearate. Examples of the ester of the linear fatty acid and the branched higher alcohol include isostearyl laurate, isotridecyl myristate, isocetyl myristate, isostearyl myristate, 2-octyldodecyl myristate, 2-ethylhexyl palmitate, isocetyl palmitate, isostearyl palmitate, 2-ethylhexyl stearate, and isocetyl stearate. Examples of the ester of the linear fatty acid and the linear higher alcohol include hexyl laurate. Examples of the ester of the linear fatty acid and the lower alcohol include isopropyl myristate, butyl myristate, and isopropyl palmitate.

[0039] The above fats and oils mainly contain triesters of fatty acids and glycerin, and it is preferable to blend one or more kinds of fats and oils into the composition of this embodiment. The blending amount of the fats and oils in the composition of this embodiment is preferably 0.5% by mass or more and 20% by mass or less, more preferably 1.0% by mass or more and 10% by mass or less, still more preferably 1.5% by mass or more and 8% by mass or less, and even more preferably 2.0% by mass or more and 5% by mass or less. When the blending amount is 0.5% by mass or more, it is suitable for imparting a feeling to the hair by the fats and oils, and when it is 20% by mass or less, it is suitable for suppressing excessive feeling imparted to the hair.

[0040] Examples of the above-mentioned fats and oils include almond oil, avocado oil, olive oil, kukui nut oil, rice bran oil, corn oil, safflower oil, shea butter, shea butter oil, white mulberry seed oil, evening primrose oil, chabot cactus seed oil, camellia oil, corn germ oil, persic oil, palm kernel oil, babassu oil, peanut oil, sunflower oil, grape seed oil, hazelnut oil, macadamia nut oil, mango seed oil, meadowfoam oil, and rosehip oil.

[0041] When formulating a nonionic surfactant, the amount of the nonionic surfactant formulated in the composition of the present embodiment should be appropriately set, and is 0.1% by mass or more and 8% by mass, 0.2% by mass or more and 3% by mass or less, 0.3% by mass or more and 1.0% by mass or less, or 0.3% by mass or more and 0.7% by mass or less.

[0042] Examples of the above-mentioned nonionic surfactants include polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol tetra fatty acid ester, glycerin fatty acid ester, alkyl glucoside, sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, sucrose fatty acid ester, and alkyl alkanolamide.

[0043] (Dosage form) The dosage form of the composition of the present embodiment is not particularly limited, and is, for example, cream-like, liquid, emulsion-like, or lotion-like. When applied to hair, a cream-like O / W type emulsion is suitable because it is less likely to drip during handling. When it is a cream-like O / W type emulsion, the viscosity 60 seconds after measurement at 25°C using a B-type viscometer is, for example, 4,000 mPa·s or more and 50,000 mPa·s or less.

[0044] (pH) The pH of the composition of this embodiment should be appropriately set according to the intended use and the components to be formulated. For example, it is 6.5 or more and 11.0 or less, 7.0 or more and 10.0 or less, 7.0 or more and 9.0 or less, 7.0 or more and 8.5 or less, 7.0 or more and 8.0 or less, or 7.5 or more and 8.0 or less.

[0045] (Intended use) The composition of this embodiment is preferably used for hair care agents, coloring agents, bleaching agents, and styling agents in known hair treatments. Here, the "hair care agent" is a hair treatment agent used for hair care, such as hair washing, conditioning, etc. Examples of hair care agents include shampoos, rinses, conditioners, treatments (e.g., non-rinse treatments, rinse-off treatments, treatments for both hair styling and conditioning, a component of a multi-agent treatment, a treatment for pre-perming, a treatment for post-perming, a treatment for pre-coloring, a treatment for post-coloring, a treatment for pre-bleaching, a treatment for post-bleaching). The "coloring agent" is a hair treatment agent used for coloring hair. Examples of coloring agents include hair dyes containing direct dyes, hair dyes containing oxidation dyes that require a reaction during hair dyeing (the composition of this embodiment can be used as the first agent for oxidation hair dyeing containing the oxidation dye that is a component of this hair dye), and hair coloring agents that temporarily color hair. The "bleaching agent" is a hair treatment agent used for decolorizing hair pigments. The "styling agent" is a hair treatment agent used for temporarily holding a hairstyle. [Examples]

[0046] Hereinafter, the present invention will be described in detail based on examples, but the present invention should not be construed as being limited based on the description of these examples. Compositions of Examples 1 to 10, Comparative Examples 1 to 5, and Reference Example were manufactured, and the pH changes of all these compositions were confirmed, and the tactile evaluation of hair was performed by hair treatment using the compositions of Examples 6 to 10.

[0047] (Compositions of Examples 1 to 10, Comparative Examples 1 to 5, and Reference Example) As the compositions of Examples 1 to 10, Comparative Examples 1 to 5, and Reference Example, a creamy O / W type emulsion was produced. The components used were talc ("Crown Talc JS" manufactured by Matsumura Sangyo Co., Ltd.), kaolin ("Kaolin JP-100" manufactured by Takehara Chemical Industry Co., Ltd.), diatomaceous earth ("Optalite W-3005S" manufactured by Central Silica Co., Ltd.), cetyl alcohol, stearyl alcohol, stearyl trimethyl ammonium chloride, distearyl dimethyl ammonium chloride, isopropanol, polyoxyethylene cetyl ether (10 E.O.), polyoxyethylene hydrogenated castor oil (10 E.O.), isostearyl isostearate, safflower oil, potassium hydroxide, and water, as shown in Tables 1 to 4 below. Also, the blending amounts of the components were as shown in Tables 1 to 4 below.

[0048] (Confirmation of pH change) Regarding the pH at 25°C, it was measured immediately after the production of the compositions of the examples, etc., after standing at room temperature for 2 weeks, and after standing at 60°C for 2 weeks (during the standing period, the opening of a 100 ml glass bottle filled with the composition was sealed with a resin lid). Also, for the hydrogen ion concentration [H + , it was calculated using the following formula with the pH measured immediately after production and after standing at 60°C for 2 weeks. pH = -log 10 [H +

[0049] (Evaluation of hair feel) ​Regarding the hair bundles after hair treatment with the compositions of Examples 6 to 10, tactile evaluations of "hair thickness" and "uniform smoothness of the hair surface" were conducted. In this evaluation, as the hair bundles, hair bundles with a history of oxidative hair dyeing collected from Japanese women in their 40s, about 30 cm in length and about 5 g in weight, were used. Also, as a pretreatment before hair treatment with the compositions of Examples 6 to 10, the hair bundles were washed with shampoo ("Grand Linkage Willow Lux Shampoo" manufactured by Milbon Co., Ltd.) and rinsed with water. In addition, in the hair treatment with the compositions of Examples 6 to 10, 0.5 g of any of the compositions was applied to the wet hair bundles washed with shampoo and rinsed with water to make them conform, and the hair bundles after rinsing with water were dried with a dryer.

[0050] The evaluation of the hair bundles treated with the compositions of Examples 6 to 10 was performed by a five - stage evaluation by 5 evaluators. At the time of this evaluation, a comparative evaluation of Examples 6 to 8 with Example 7 fixed as the second - lowest evaluation "2", and a comparative evaluation of Examples 6 and 9 to 10 with Example 9 fixed as the second - lowest evaluation "2" were conducted, and the evaluation was based on the average evaluation by 5 evaluators. Note that "hair thickness" is the tactile feeling that the hair feels thick, and "uniform smoothness of the hair surface" is the tactile feeling that the hair surface is uniform and smooth.

[0051] Table 1 below is a table for comparing Example 1 with Comparative Example 1, Example 2 with Comparative Example 2, Example 3 with Comparative Example 3, Example 4 with Comparative Example 4, and Example 5 with Comparative Example 5. In any of the comparisons, it can be confirmed that in the case of the examples containing talc, which is a silicate mineral, there is no pH decrease as in the comparative examples without such a formulation.

[0052]

Table 1

[0053] Table 2 below compares the types and presence or absence of silicate minerals or diatomaceous earth. It can be confirmed that Examples 6 to 8 containing silicate minerals or diatomaceous earth do not show a pH decrease like Comparative Example 5 without such a formulation. Also, in the tactile evaluation of hair, the evaluation of Example 6 containing talc was superior to that of Example 7 containing kaolin and Example 8 containing diatomaceous earth.

[0054]

Table 2

[0055] Table 3 below compares the amounts of talc, which is a silicate mineral. It can be confirmed that as the amount of talc increases, the pH decrease after standing becomes smaller, indicating that the pH change can be controlled by the amount of its formulation. Also, in the tactile evaluation of hair, as the amount of talc increases, the evaluation results improve, showing that the hair feel can be adjusted by the amount of its formulation.

[0056]

Table 3

[0057] Table 4 below shows the pH decrease. The reference example shows that when a higher alcohol and a cationic surfactant are formulated, even if the pH immediately after production is acidic, the pH decreases upon standing. Also, in Comparative Examples 1 to 5, the pH immediately after production was adjusted to about 8, and it can be confirmed that in Comparative Examples 2 to 5 where a nonionic surfactant, an ester oil, or an oil and fat was additionally formulated in Comparative Example 1, the pH after standing decreased more significantly than in Comparative Example 1.

[0058]

Table 4

Claims

1. A composition containing a silicate mineral and / or diatomaceous earth, a higher alcohol, a cationic surfactant, and water.

2. The composition according to Claim 1, having a pH of 6.5 or higher.

3. The composition according to Claim 2, which is used for applications such as hair care agents, coloring agents, bleaching agents, or styling agents.

4. The composition according to Claim 3, in which talc is blended as the silicate mineral.

5. The composition according to Claim 4, in which the blending amount of the talc is 0.3% by mass or more.

6. The composition according to Claim 3, in which one or more selected from ester oils, fats and oils, and nonionic surfactants are blended.

7. The composition according to Claim 6, in which the total blending amount of the ester oil and the fats and oils is 0.5% by mass or more, and / or the blending amount of the nonionic surfactant is 0.1% by mass or more.

8. A hair treatment method using the composition according to any one of Claims 3 to 7.

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