Hair washing composition and hair treatment method

Abstract

To provide a hair washing composition that includes a predetermined polyoxyethylene alkyl ether acetic acid and / or a salt thereof, and fatty acid amide propyl dimethylamino acetic acid betaine, and allows a finger to easily run through the hair when the composition is washed off, and a hair treatment method that allows a finger to easily run through the hair when the composition is washed off.SOLUTION: A hair washing composition includes a predetermined polyoxyethylene alkyl ether acetic acid and / or a salt thereof, fatty acid amide propyl dimethylamino acetic acid betaine, and N-fatty acid amide propyl-N,N-dimethyl ammonium-N-(2-hydroxypropyl) sulfonate. A hair treatment method includes using the hair washing composition including a predetermined polyoxyethylene alkyl ether acetic acid and / or a salt thereof, fatty acid amide propyl dimethylamino acetic acid betaine, and N-fatty acid amide propyl-N,N-dimethyl ammonium-N-(2-hydroxypropyl) sulfonate.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a hair washing composition and a hair treating method using said composition. [Background technology]

[0002] Anionic surfactants are generally blended in hair washing compositions (shampoos) for washing hair. From various anionic surfactants such as carboxylic acid anionic surfactants, sulfonic acid anionic surfactants, sulfate ester anionic surfactants, and phosphate anionic surfactants, surfactants are selected based on characteristics such as cleaning power, and polyoxyethylene alkyl ether acetic acid and its salts, which are a type of carboxylic acid anionic surfactant, are said to be less irritating to the skin. Amphoteric surfactants are blended to thicken hair washing compositions and stabilize foam, and fatty acid amidopropyl dimethylaminoacetic acid betaine, which is a type of amphoteric surfactant, is said to be less irritating to the skin.

[0003] As hair washing compositions containing polyoxyethylene alkyl ether acetic acid and / or a salt thereof, and fatty acid amidopropyl dimethylaminoacetic acid betaine, Patent Document 1 discloses a hair washing composition containing (A) polyoxyethylene alkyl ether acetic acid and / or a salt thereof, (B) fatty acid N-methylethanolamide, fatty acid diethanolamide, fatty acid amidopropyl dimethylaminoacetic acid betaine, alkyl dimethylaminoacetic acid betaine, cationized cellulose, cationized guar gum and / or cationized cassia, and (C) pyrosulfite, sulfite, acetylcysteine ​​and / or dibutylhydroxytoluene. Patent Document 2 discloses a hair washing composition containing (A) polyquaternium-22, polyquaternium-47 and / or polyquaternium-53, (B) polyoxyethylene alkyl ether acetic acid and / or a salt thereof, (C) fatty acid amidopropyl dimethylaminoacetic acid betaine, and (D) glyceryl monocaprate and / or glyceryl monocaprylate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-150265 A [Patent Document 2] JP 2019-38785 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the hair washing composition is washed off from the hair in the hair washing process, if the hair is difficult to run through, the hair cannot be washed off smoothly. The incorporation of an anionic surfactant and an amphoteric surfactant is one of the factors that easily cause the hair to be difficult to run through, and the same is true for the incorporation of polyoxyethylene alkyl ether acetate and fatty acid amidopropyl dimethylaminoacetic acid betaine, but due to the required characteristics such as low irritation to the scalp, it may be difficult to avoid the incorporation of these surfactants. In order to deal with such a situation, the incorporation of a cationic polymer such as cationic cellulose is generally known, and it can be said that other measures are also desirable.

[0006] In view of the above circumstances, the present invention aims to provide a hair wash composition which contains a specified polyoxyethylene alkyl ether acetic acid and / or a salt thereof, and fatty acid amidopropyl dimethylaminoacetic acid betaine, and which exhibits excellent finger-running properties when removed by rinsing with water, and a hair treatment method which exhibits excellent finger-running properties when the hair wash composition is removed by rinsing with water. [Means for solving the problem]

[0007] As a result of intensive research, the present inventors have found that in a hair wash composition containing a specified polyoxyethylene alkyl ether acetic acid and / or a salt thereof, and fatty acid amidopropyl dimethylaminoacetic acid betaine, the inclusion of N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate improves the ease of running fingers through hair when the composition is washed off with water, and furthermore, that the composition has excellent foaming speed, which has led to the completion of the present invention.

[0008] That is, the hair washing composition according to the present invention is characterized by comprising the following components (A), (B), and (C): (A) Polyoxyethylene alkyl ether acetic acid (A) represented by the following general formula (A) and / or a salt thereof R 1 -(OCH2CH2) X -OCH2COOH (A) [In the above general formula (A), R 1 represents a linear alkyl group having 10 to 16 carbon atoms, and X represents an average number of moles of ethylene oxide added of 4 to 16. (B) Fatty acid amidopropyl dimethylaminoacetic acid betaine (C) N-Fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate

[0009] The hair wash composition according to the present invention preferably contains, as the component (A), one or more selected from polyoxyethylene (4) lauryl ether acetic acid, polyoxyethylene (4.5) lauryl ether acetic acid, polyoxyethylene (5) lauryl ether acetic acid, polyoxyethylene (6) lauryl ether acetic acid, polyoxyethylene (8) lauryl ether acetic acid, polyoxyethylene (10) lauryl ether acetic acid, polyoxyethylene (11) lauryl ether acetic acid, polyoxyethylene (12) lauryl ether acetic acid, polyoxyethylene (13) lauryl ether acetic acid, polyoxyethylene (14) lauryl ether acetic acid, polyoxyethylene (16) lauryl ether acetic acid, and salts thereof (the number in parentheses following polyoxyethylene indicates the average number of moles of ethylene oxide added. The same applies hereinafter.).

[0010] In addition, the hair washing composition according to the present invention preferably contains, as the component (A), one or more selected from polyoxyethylene (4) lauryl ether acetic acid, polyoxyethylene (4.5) lauryl ether acetic acid, polyoxyethylene (5) lauryl ether acetic acid, polyoxyethylene (6) lauryl ether acetic acid, and salts thereof, and one or more selected from polyoxyethylene (8) lauryl ether acetic acid, polyoxyethylene (10) lauryl ether acetic acid, polyoxyethylene (11) lauryl ether acetic acid, polyoxyethylene (12) lauryl ether acetic acid, polyoxyethylene (13) lauryl ether acetic acid, polyoxyethylene (14) lauryl ether acetic acid, polyoxyethylene (16) lauryl ether acetic acid, and salts thereof. This combination improves the speed of lathering and the smoothness of the hair when washed off with water.

[0011] Furthermore, the hair washing composition according to the present invention contains, for example, one or more of lauric acid amidopropyl dimethylaminoacetic acid betaine, coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine, and isostearic acid amidopropyl dimethylaminoacetic acid betaine as the component (B).

[0012] The hair wash composition according to the present invention contains, for example, N-lauric acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate and / or N-coconut oil fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate as the component (C).

[0013] The hair treatment method according to the present invention is characterized by using the hair washing composition according to the present invention. Effect of the Invention

[0014] According to the hair washing composition of the present invention, when a specified polyoxyethylene alkyl ether acetic acid and / or a salt thereof, and fatty acid amidopropyl dimethylaminoacetic acid betaine are blended, N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate is also blended, so that the hair washing composition has excellent finger combability and quick foaming when washed off with water.

[0015] Furthermore, according to the hair treatment agent of the present invention, a hair wash composition is used which contains a specified polyoxyethylene alkyl ether acetic acid and / or a salt thereof, and fatty acid amidopropyl dimethylaminoacetic acid betaine, as well as N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate, and therefore the hair treatment agent provides excellent finger combability and quick lathering when removed by rinsing with water. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The present invention will be described below based on the embodiments of the present invention. The hair washing composition of the present embodiment contains the following components (A), (B), and (C), and water (the amount of water is, for example, 70% by mass or more). In addition, if acceptable for use, components contained in known hair washing compositions may be further contained as optional components. (A) A specific polyoxyethylene alkyl ether acetic acid and / or a salt thereof (B) Fatty acid amidopropyl dimethylaminoacetic acid betaine (C) N-Fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate

[0017] (Component (A): Prescribed polyoxyethylene alkyl ether acetic acid and / or its salt) The component (A) contained in the hair washing composition of the present embodiment is polyoxyethylene alkyl ether acetic acid (A) represented by the following general formula (A) and / or a salt thereof. Examples of the salt include a sodium salt and a potassium salt. R 1 -(OCH2CH2) X -OCH2COOH (A) [In the above general formula (A), R 1 represents a linear alkyl group having 10 to 16 carbon atoms, and X represents an average number of moles of ethylene oxide added of 4 to 16.

[0018] The component (A) may be, for example, one or more selected from polyoxyethylene (4) lauryl ether acetic acid, polyoxyethylene (4.5) lauryl ether acetic acid, polyoxyethylene (5) lauryl ether acetic acid, polyoxyethylene (6) lauryl ether acetic acid, polyoxyethylene (8) lauryl ether acetic acid, polyoxyethylene (10) lauryl ether acetic acid, polyoxyethylene (11) lauryl ether acetic acid, polyoxyethylene (12) lauryl ether acetic acid, polyoxyethylene (13) lauryl ether acetic acid, polyoxyethylene (14) lauryl ether acetic acid, polyoxyethylene (16) lauryl ether acetic acid, and salts thereof. The amount of component (A) in the hair wash composition of this embodiment is, for example, 1% by mass or more and 5% by mass or less.

[0019] The hair washing composition of this embodiment may contain polyoxyethylene alkyl ether acetic acid (a1) and / or a salt thereof and polyoxyethylene alkyl ether acetic acid (a2) and / or a salt thereof, as shown below. Here, the polyoxyethylene alkyl ether acetic acid (a1) and / or a salt thereof is one or more selected from polyoxyethylene (4) lauryl ether acetic acid, polyoxyethylene (4.5) lauryl ether acetic acid, polyoxyethylene (5) lauryl ether acetic acid, polyoxyethylene (6) lauryl ether acetic acid, and salts thereof, and the polyoxyethylene alkyl ether acetic acid (a2) and / or a salt thereof is one or more selected from polyoxyethylene (8) lauryl ether acetic acid, polyoxyethylene (10) lauryl ether acetic acid, polyoxyethylene (11) lauryl ether acetic acid, polyoxyethylene (12) lauryl ether acetic acid, polyoxyethylene (13) lauryl ether acetic acid, polyoxyethylene (14) lauryl ether acetic acid, polyoxyethylene (16) lauryl ether acetic acid, and salts thereof. From the viewpoint of a soft feel of the hair after drying, the mass ratio of the total amount of polyoxyethylene alkyl ether acetic acid (a2) and its salts to the total amount of polyoxyethylene alkyl ether acetic acid (a1) and its salts is preferably less than 0.5, more preferably less than 0.1, and more preferably less than 0.05 (the lower limit of this mass ratio is, for example, 0.01).

[0020] (Component (B): Fatty acid amidopropyl dimethylaminoacetic acid betaine) The component (B) incorporated in the hair wash composition of the present embodiment is fatty acid amidopropyldimethylaminoacetic acid betaine represented by the following general formula (B). [ka] [In the above general formula (B), R 2 represents an alkyl group, for example, a linear or branched alkyl group having 9 to 17 carbon atoms.

[0021] The (B) component may be a known fatty acid amidopropyl dimethylaminoacetic acid betaine, and for example, one or more selected from lauric acid amidopropyl dimethylaminoacetic acid betaine, coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine, and isostearic acid amidopropyl dimethylaminoacetic acid betaine are blended in the hair washing composition of this embodiment. The blending amount of the (B) component in the hair washing composition of this embodiment is preferably 2% by mass or more and 10% by mass or less, and preferably 3% by mass or more and 7% by mass or less. When it is 3% by mass or more, it is suitable for foaming during use, and when it is 10% by mass or less, it is suitable for suppressing irritation to the skin.

[0022] (Component (C): N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate) The component (C) incorporated in the hair wash composition of the present embodiment is N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate represented by the following general formula (C). [ka] [In the above general formula, R 3 represents an alkyl group, for example, a linear or branched alkyl group having 9 to 17 carbon atoms.

[0023] The (C) component may be a known N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate, for example, N-lauric acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate, N-coconut oil fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate, or N-lauric acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate and N-coconut oil fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate are blended in the hair washing composition of this embodiment. The blending amount of the (C) component in the hair washing composition of this embodiment is preferably 0.01 or more and 0.5 or less, and preferably 0.03 or more and 0.1 or less, as a mass ratio of the blending amount of the (C) component / the blending amount of the (B) component. When the ratio is 0.01 or more, the composition is suitable for foaming and smooth running of fingers when washed away with water, and when the ratio is 0.5 or less, the composition is suitable for smooth running of fingers when washed away with water.

[0024] (optional ingredient) The hair washing composition of the present embodiment contains optional components as described above in addition to the components (A), (B), and (C), such as anionic surfactants, amphoteric surfactants, nonionic surfactants, cationic polymers such as cationic cellulose, ester oils, silicones, higher alcohols, thickeners, chelating agents, preservatives, ultraviolet absorbing agents, and fragrances.

[0025] (Dosage form) The hair wash composition of the present embodiment is preferably in a liquid form suitable for hair washing. When adjusted to a liquid form, the viscosity after 60 seconds measured at 25° C. using a B-type viscometer is, for example, 800 mPa s or more and 2000 mPa s or less.

[0026] (pH) The pH of the hair wash composition of the present embodiment at 25° C. is preferably 4.5 or more and 7.5 or less, and more preferably 5.0 or more and 7.0 or less, from the viewpoint of foaming.

[0027] (Hair Treatment) When performing hair treatment by washing hair using the hair wash composition of the present embodiment, similar to known hair washing methods, it is preferable to rinse the hair with water, apply the washing composition of the present embodiment to the hair, and then wash off the composition with water. EXAMPLES

[0028] The present invention will be described in detail below based on examples. However, the present invention should not be construed as being limited to the descriptions of these examples. The hair washing compositions of the Examples and Comparative Examples were evaluated. The details are as follows.

[0029] (Hair washing composition) Water and other ingredients were mixed to produce liquid hair washing compositions of Examples 1a to 1b, Comparative Example 1, and Examples 2a to 2c. The ingredients mixed with water here were selected from POE (4.5) sodium lauryl ether acetate ("POE" means "polyoxyethylene"; the same applies below), POE (10) sodium lauryl ether acetate, coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine, isostearic acid amidopropyl dimethylaminoacetic acid betaine, N-lauric acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate, POE (2) sodium lauryl ether sulfate, sodium tetradecene sulfonate solution, N-sodium lauroyl aspartate, coconut oil fatty acid ethyl ester sulfonate sodium, coconut oil fatty acid N-methylethanolamide, pyroglutamic acid isostearic acid POE (40) hydrogenated castor oil, polyquaternium-10, trehalose, dipropylene glycol, sodium chloride, preservatives, anti-inflammatory agents, chelating agents, and fragrances, and the amounts of the ingredients were as shown in Tables 1 to 2 below.

[0030] (evaluation) After rinsing the hair of an average woman with warm water, different hair washing compositions (either the above-mentioned Examples or Comparative Examples) were used on the left and right sides of the hair to create lather, and the hair washing compositions were then washed off with warm water. During this process, eight evaluators evaluated the "speed of lathering" and "ease of running fingers through the hair when rinsing off with water."

[0031] Tables 1 and 2 below show the evaluation results for the hair washing compositions of Examples and Comparative Examples, along with the components mixed with water and their amounts.

[0032] [Table 1]

[0033] In the above Table 1, the evaluations "1", "2", and "3" indicate relative evaluations of Examples 1a-1b and Comparative Example 1, with "1" being the best evaluation, "2" being the next best evaluation, and "3" being the next best evaluation (all evaluators gave the same evaluation). In Table 1, Examples 1a-1b, which contain the component (C), were rated as being superior to Comparative Example 1 in terms of "quickness of lathering" and "smoothness of fingers when rinsing off with water". In addition, Example 1a, which contains a combination of a salt of polyoxyethylene alkyl ether acetic acid (a1) (POE (4.5) sodium lauryl ether acetate) and a salt of polyoxyethylene alkyl ether acetic acid (a2) (POE (10) sodium lauryl ether acetate), was rated as being superior to Example 1b in terms of "quickness of lathering" and "smoothness of fingers when rinsing off with water".

[0034] [Table 2]

[0035] In the above Table 2, the ratings "1" and "2" indicate relative ratings in Examples 2a to 2c, with "1" meaning the best rating and "2" meaning the next best rating (all evaluators gave the same rating). In Table 2, Examples 2b to 2c, which used a combination of a salt of polyoxyethylene alkyl ether acetic acid (a1) (POE(4.5) sodium lauryl ether acetate) and a salt of polyoxyethylene alkyl ether acetic acid (a2) (POE(10) sodium lauryl ether acetate), were rated as being superior to Example 2a in "quickness of foaming" and "ease of running fingers through when rinsing with water."

Claims

1. A hair washing composition comprising the following components (A), (B), and (C): (A) Polyoxyethylene alkyl ether acetic acid (A) represented by the following general formula (A) and / or a salt thereof R １ -(OCH ２ CH ２ ) Ｘ -OCH ２ COH (A) [In the above general formula (A), R １ represents a linear alkyl group having 10 to 16 carbon atoms, and X represents an average number of moles of ethylene oxide added of 4 to 16. (B) Fatty acid amidopropyl dimethylaminoacetic acid betaine (C) N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate

2. 2. The hair washing composition according to claim 1, wherein the component (A) is one or more selected from polyoxyethylene (4) lauryl ether acetic acid, polyoxyethylene (4.5) lauryl ether acetic acid, polyoxyethylene (5) lauryl ether acetic acid, polyoxyethylene (6) lauryl ether acetic acid, polyoxyethylene (8) lauryl ether acetic acid, polyoxyethylene (10) lauryl ether acetic acid, polyoxyethylene (11) lauryl ether acetic acid, polyoxyethylene (12) lauryl ether acetic acid, polyoxyethylene (13) lauryl ether acetic acid, polyoxyethylene (14) lauryl ether acetic acid, polyoxyethylene (16) lauryl ether acetic acid, and salts thereof.

3. As the component (A), one or more selected from polyoxyethylene (4) lauryl ether acetic acid, polyoxyethylene (4.5) lauryl ether acetic acid, polyoxyethylene (5) lauryl ether acetic acid, polyoxyethylene (6) lauryl ether acetic acid, and salts thereof; one or more selected from polyoxyethylene (8) lauryl ether acetic acid, polyoxyethylene (10) lauryl ether acetic acid, polyoxyethylene (11) lauryl ether acetic acid, polyoxyethylene (12) lauryl ether acetic acid, polyoxyethylene (13) lauryl ether acetic acid, polyoxyethylene (14) lauryl ether acetic acid, polyoxyethylene (16) lauryl ether acetic acid, and salts thereof; 2. The hair washing composition according to claim 1, which comprises

4. The hair wash composition according to any one of claims 1 to 3, wherein the component (B) is one or more selected from the group consisting of lauric acid amidopropyl dimethylaminoacetic acid betaine, coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine, and isostearic acid amidopropyl dimethylaminoacetic acid betaine.

5. The hair wash composition according to any one of claims 1 to 4, wherein N-lauric acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate and / or N-coconut oil fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate are blended as the component (C).

6. A hair treatment method, comprising using the hair washing composition according to any one of claims 1 to 5.

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