JP7110797B2 - Hair cleanser composition - Google Patents

Description

The present invention provides a hair cleanser composition which is excellent in foaming speed and foam elasticity (resilience) during hair washing, good finger passability during rinsing, imparts elasticity to hair after drying, and prevents foam from dripping off during hair washing. about things.

In recent years, shampoos that are used in recent years tend to prefer low-irritation shampoos against the backdrop of the growing trend toward natural products among consumers. As such shampoos, those containing an amino acid-based surfactant as a low-irritant cleansing component have become mainstream. However, although amino acid-based surfactants have the advantage of being less irritating, they are inferior to conventional sulfate-type surfactants such as polyoxyethylene alkyl ether sulfates in foaming speed and foam elasticity. there was a case. In particular, when washing hair, warm water of about 40° C. is used, so foaming tends to be slow and the elasticity of the foam tends to be weak. As described above, the speed of foaming and the elasticity of the foam can be expected to have the effect of improving the feeling of use and the effect of suppressing the tangling of the hair during washing.

During shampooing or rinsing, the hair may get entangled, resulting in split ends or split ends. Therefore, in order to prevent tangling of hair, rapid foaming and elasticity (firmness) of foam are required when washing hair, and good finger combing is required when rinsing hair. Here, with regard to finger combing during rinsing, the effect of finger combing during rinsing is insufficient for hair that has been damaged by chemical treatments such as perming and hair coloring, and whose cuticles have been turned up. Sometimes. Since tangling of hair during rinsing leads to split ends and split ends, it is important to achieve both the speed of lathering during washing and the elasticity of the foam (resilience) and smoothness during rinsing in order to maintain the health of the hair. be.

As a method for improving the speed of foaming, for example, Patent Document 1 discloses an anionic surfactant such as polyoxyethylene alkyl ether sulfate, an amphoteric surfactant such as coconut oil fatty acid amidopropyl betaine, and N, N- Detergent compositions are disclosed that are combined with a thickening agent comprising a specific tertiary amine compound such as dimethylaminoethanol. With this composition, the speed of foaming can be improved, but the resilience (body) of the foam is insufficient.

As a method for improving foaming speed and foam elasticity (body), for example, Patent Document 2 describes anionic surfactants such as alkyl sulfate triethanolamine and N-acylamino acid salts, amphoteric surfactants, and an HLB value of 16. A hair cleansing composition is disclosed that combines a nonionic surfactant, such as a polyoxyethylene alkyl ether of .5 to 19.5, and a cationic polymer. Although this composition can improve foaming speed and foam elasticity (body), it is insufficient in terms of hair elasticity after drying and finger combability during rinsing.

As a method for imparting elasticity to hair after drying, for example, Patent Document 3 describes a combination of polyoxyethylene alkyl ether sulfate, an amphoteric surfactant such as lauryl hydroxysulfobetaine, a cationized galactomannan, and an acylmethylalanine salt. A hair cleansing composition is disclosed. This composition can improve the elasticity of the hair and the elasticity of the foam after drying, but the foaming speed and finger combability during rinsing are insufficient.

As a method for improving finger combability during rinsing, for example, Patent Document 4 describes anionic surfactants, nonionic surfactants, specific long-chain alkylbetaine surfactants, specific medium-chain alkylbetaine surfactants, and ethylene glycol, etc. are disclosed. This composition can improve finger combability during rinsing, but is insufficient in terms of foaming speed and foam elasticity (firmness).

As described above, regarding hair washing compositions, there are techniques for improving some of the speed of foaming during shampooing, elasticity of foam (resilience), finger passability during rinsing, and stiffness and stiffness of hair after drying. There was no technology to improve the

In recent years, men's hair cleansing agents and the like have been increasing due to the growing awareness of men's grooming and cleanliness. Until now, most men have short hair compared to women, and since the foam is closer to the ends of the hair when washing, it tends to drip off. There is a problem that the effect is not sufficiently exhibited, and there is still room for improvement in terms of making it difficult for the foam near the tip of the hair to drip.

Japanese Unexamined Patent Application Publication No. 2013-10902 JP 2016-44132 A JP 2017-48128 A JP 2016-222560 A

An object of the present invention is to provide a hair wash that is excellent in foaming speed and foam elasticity (resilience) during hair washing, good finger combability during rinsing, imparts a firm and resilient feeling to hair after drying, and prevents foam from dripping off during hair washing. It is to provide an agent composition.

The present inventors have conducted intensive studies to solve the above problems, and found that the above objects can be achieved by blending a specific acylhydroxyalkylalanine salt and a specific alkylhydroxysulfobetaine in a specific ratio. The inventors have found that a hair cleansing composition can be obtained, and have completed the present invention.

That is, the present invention comprises (a) component: 3 to 30% by mass of an acylhydroxyalkylalanine salt represented by formula (1), and (b) component: 2 to 2% of alkylhydroxysulfobetaine represented by formula (2). 20% by mass, component (c): 50 to 95% by mass of water.
The total amount of components (a) to (c) is 80 to 100% by mass, preferably 85 to 98% by mass, more preferably 90 to 95% by mass in the hair cleansing composition of the present invention.

（式中、Ｒ^１ＣＯは炭素数８～２２の脂肪族アシル基を示し、Ｒ^２は単結合または炭素数１～４のアルキレン基を示し、Ｒ^３は炭素数１～４のアルキレン基を示し、Ｍはアルカリ金属原子、アルカノールアミンまたは塩基性アミノ酸を示す。）

(In the formula, R ¹ CO represents an aliphatic acyl group having 8 to 22 carbon atoms, R ² represents a single bond or an alkylene group having 1 to 4 carbon atoms, and R ³ represents an alkylene group having 1 to 4 carbon atoms. and M represents an alkali metal atom, alkanolamine or basic amino acid.)

（式中、Ｒ^４は炭素数８～２２のアルキル基または炭素数８～２２のアルケニル基を示し、Ｒ^５およびＲ^６は各々独立してメチル基またはエチル基を示す。）

(In the formula, R ⁴ represents an alkyl group having 8 to 22 carbon atoms or an alkenyl group having 8 to 22 carbon atoms, and R ⁵ and R ⁶ each independently represents a methyl group or an ethyl group.)

According to the hair cleansing composition of the present invention, foaming is rapid during shampooing, sufficient elasticity (resilience) of the foam can be obtained, finger combability during rinsing is good, and the hair after drying has a firm and resilient feeling. It is possible to prevent the foam from dripping when washing the hair.

Embodiments of the present invention will be described below.
The hair cleansing composition of the present invention contains (a) an acylhydroxyalkylalanine salt, (b) an alkylhydroxysulfobetaine, and (c) water in a specific ratio. Each component will be described below.

[Component (a): acylhydroxyalkylalanine salt]
Component (a) used in the present invention is an amino acid-based surfactant represented by formula (1).
R ¹ in formula (1) represents an alkyl group having 7 to 21 carbon atoms or an alkenyl group having 7 to 21 carbon atoms, and R ¹ CO represents an aliphatic acyl group having 8 to 22 carbon atoms, preferably 8 to 18 carbon atoms. indicates a group. Aliphatic acyl groups include not only acyl groups derived from saturated or unsaturated fatty acids having 8 to 22 carbon atoms, but also acyl groups derived from mixed fatty acids containing two or more of these fatty acids. In the case of the mixed fatty acid-derived acyl group, the average carbon number calculated from the carbon numbers of the various fatty acids constituting the mixed fatty acid is limited within the above range.
Examples of such aliphatic acyl groups include coconut oil fatty acid acyl groups, palm kernel oil fatty acid acyl groups, caproyl groups, lauroyl groups, myristoyl groups, palmitoyl groups, stearoyl groups, oleoyl groups, and behenyl groups. Preferred are lauroyl group, myryltoyl group, coconut oil fatty acid acyl group and palm kernel oil fatty acid acyl group. Lauroyl groups, coconut oil fatty acid acyl groups, and palm kernel oil fatty acid acyl groups are more preferred. A typical content ratio of each acyl group contained in the coconut oil fatty acid acyl group is C8:C10:C12:C14:C16:C18=5:6:55:17:10:7 (mass ratio). The average carbon number in the case is 12.8. A typical content ratio of each acyl group contained in the palm kernel oil fatty acid acyl group is C8:C10:C12:C14:C16:C18 = 3:7:47:14:9:20 (mass ratio). , the average carbon number in this case is 13.6.

R ² in formula (1) represents a single bond or an alkylene group having 1 to 4 carbon atoms. The alkylene group may be either linear or branched, and examples of such alkylene groups include methylene, ethylene, n-propylene, isopropylene, n-butylene, and isobutylene groups, preferably They are an ethylene group and an n-propylene group. That is, examples of R ² OH in formula (1) include a monohydroxyethyl group, a monohydroxypropyl group, a monohydroxyisopropyl group, a monohydroxybutyl group and a 2-hydroxybutyl group. A monohydroxyethyl group and a monohydroxypropyl group are preferred.

R ³ in formula (1) represents an alkylene group having 1 to 4 carbon atoms. The alkylene group may be either linear or branched, and examples of such alkylene groups include methylene, ethylene, n-propylene, isopropylene, n-butylene, and isobutylene groups, preferably They are an ethylene group and an n-propylene group. That is, examples of R ³ COOH in formula (1) include a monocarboxymethylene group, a monocarboxyethylene group, a monocarboxypropylene group, a monocarboxyisopropylene group, a monocarboxybutylene group, a monocarboxyisobutylene group, and the like. . A monocarboxyethylene group is preferred.

M in formula (1) represents an alkali metal atom, alkanolamine or basic amino acid. Alkali metal atoms include, for example, sodium and potassium. Examples of alkanolamine include monoethanolamine, diethanolamine, triethanolamine and the like. Basic amino acids include, for example, arginine and lysine hydrochloride. Among these, sodium, potassium and triethanolamine are preferred.

Specific examples of amino acid-based surfactants represented by formula (1) include N-lauroyl-N-hydroxyethyl-β-alanine sodium, N-lauroyl-N-hydroxyethyl-β-alanine triethanolamine. , N-cocoyl-N-hydroxyethyl-β-alaninetriethanolamine, N-lauroyl-N-hydroxypropyl-β-alaninetriethanolamine, N-coconut fatty acid acyl-N-hydroxyethyl-L-alaninetriethanolamine amines, N-palm kernel fatty acid acyl-N-hydroxypropyl-L-alanine sodium, and the like.

In the present invention, one or more of the compounds included in the above formula (1) can be appropriately selected and used as the component (a).

The amount of component (a) in the composition of the present invention is usually 3 to 30% by mass, preferably 5 to 20% by mass, more preferably 10 to 20% by mass. If the amount of component (a) is too small, the elasticity of the foam may become weak when shampooing, and the foam may easily drip off. It could get worse.
In addition, when multiple types of acylhydroxyalkylalanine salts represented by formula (1) are used in combination, the total amount of these multiple types should be within the above range.

[(b) Component: Alkylhydroxysulfobetaine]
Component (b) used in the present invention is an amphoteric surfactant represented by formula (2), ie, an alkylhydroxysulfobetaine type amphoteric surfactant. R ⁴ in formula (2) represents an alkyl group having 8 to 22 carbon atoms or an alkenyl group having 8 to 22 carbon atoms. The number of carbon atoms is preferably 8-18. Alkyl and alkenyl groups may be straight or branched chain and include not only alkyl or alkenyl groups derived from saturated or unsaturated hydrocarbons, but also mixed hydrocarbon derived groups containing two or more of these hydrocarbons. of alkyl or alkenyl groups. In the case of the mixed hydrocarbon-derived alkyl group or alkenyl group, the average value of the carbon number calculated from the carbon numbers of various hydrocarbons constituting the mixed hydrocarbon-derived is limited within the above range.
Examples of such alkyl or alkenyl groups include lauryl, myristyl, palmityl, stearyl, oleyl, arachidyl and behenyl groups. Alkyl groups or alkenyl groups derived from mixed oils and fats can also be used, and examples thereof include coconut oil alkyl groups, palm kernel oil alkyl groups, beef tallow alkyl groups, and the like. Preferred are lauryl group, myristyl group, coconut oil alkyl group and palm kernel oil alkyl group.

R5 and R6 in ^formula ( ² ) are each independently a methyl group or an ethyl group. Preferably both ^R5 and ^R6 are methyl groups.

Specific examples of the alkylhydroxysulfobetaine represented by formula (2) include laurylhydroxysulfobetaine and cocohydroxysulfobetaine.

In the present invention, one or more of the compounds included in the above formula (2) can be appropriately selected and used as the component (b).

The amount of the component (b) in the composition of the present invention is usually 2 to 20% by mass, preferably 5 to 15% by mass, more preferably 5 to 10% by mass. If the amount of component (b) is too small, lathering may become slow, and if the amount of component (b) is too large, the hair may become less elastic after drying.
When multiple types of amphoteric surfactants represented by formula (2) are used in combination, the total amount of these multiple types should be within the above range.

[(c) component: water]
Component (c) in the present invention is water, and for example, ion-exchanged water, purified water, distilled water, or the like is used. The amount of component (c) is generally 50 to 95% by mass, preferably 65 to 90% by mass, more preferably 70 to 90% by mass.

In the composition of the present invention, the mass ratio (a)/(b) of component (a) to component (b) is preferably 0.5 to 5, more preferably 1.0 to 2.0. It is preferably 1.2 to 1.8, more preferably 1.4 to 1.6. When the mass ratio (a)/(b) is within the above range, it is possible to obtain, in a well-balanced manner, the elasticity of the foam, the stiffness of the hair after drying, and the smoothness of the hair during rinsing.
Further, the total mass of components (a) and (b) (a) + (b) is preferably 5 to 50% by mass, more preferably 10 to 35% by mass, and particularly preferably 10 to 30% by mass. If the total mass (a)+(b) is within the above range, foaming will be faster and finger combability during rinsing will be even better.

[Hair cleansing composition]
By mixing the above components (a) to (c), the hair cleansing composition of the present invention can be obtained. The hair cleansing composition of the present invention may optionally contain other ingredients used in shampoos, as long as they do not impair the effects of the present invention.

As such other components, cationized polymers such as cationized cellulose, cationized guar gum, and acrylic cationized polymers are particularly preferred.
The content of the cationic polymer in the hair cleansing composition of the present invention is preferably 0.01 to 5% by mass, more preferably 0.1 to 1% by mass.

EXAMPLES The present invention will now be described more specifically with reference to examples and comparative examples. As Examples 1 to 10 and Comparative Examples 1 to 5, hair cleansing compositions having compositions shown in Tables 1 and 2 were prepared and evaluated by the following methods.

(1) Foaming speed A panel of 20 men and women (24 to 43 years old) was used to evaluate the foaming speed when 5 g of the hair cleansing composition was foamed by hand using tap water at 40°C. A total score of 20 people was obtained and evaluated as follows, with 2 points for feeling that foaming was fast, 1 point for feeling that foaming was a little fast, and 0 point for feeling that foaming was slow.
A: The total score is 30 points or more; foaming is very fast.
O: Total score is 20 or more and less than 30 points; foaming is fast.
Δ: Total score is 10 or more and less than 20; Foaming is slightly slow.
x: The total score is less than 10 points; foaming is slow.

(2) Elasticity of foam
100 g of a sample (a hair cleansing composition diluted to 3% by mass with deionized water) at 40° C. was placed in a 1000 mL measuring cylinder without foaming. Next, an air stone portion of a goldfish pump (air pump, non-noise S-200, manufactured by Nichido Co., Ltd.) was placed in the sample aqueous solution, and foamed to 1000 mL at a flow rate of 1000 mL/min. A float (fluorescent synthetic dama No. 15, weighing 10 grams) with a weight (5 grams) is placed in the foam, and the time taken for the center line of the float to pass from 1000 mL to 500 mL is measured. The resilience (body) of the foam was evaluated.
⊚: Passing time of 15 seconds or longer; elasticity of foam is very strong.
◯: Passing time is 10 seconds or more and less than 15 seconds; the elasticity of the foam is strong.
Δ: Passing time of 5 seconds or more and less than 10 seconds; elasticity of foam is weak.
x: Passing time less than 5 seconds; no foam elasticity.

(3) Finger penetration during rinsing A panel of 20 men and women (ages 24 to 43) who are coloring their hair was washed and rinsed with 5 mL of the hair cleansing composition using water at 40°C. rated the street. A total of 20 points, with 2 points if the finger combing was smooth and the hair did not get caught, 1 point if the hair was slightly caught on the fingers, and 0 points if the finger combing was very poor. was obtained and evaluated as follows.
(double-circle): The total score is 30 points or more; The finger combability at the time of rinsing is very excellent.
◯: Total score is 20 or more and less than 30 points; finger combability during rinsing is excellent.
Δ: Total score is 10 or more and less than 20; Finger combability during rinsing is slightly poor.
x: The total score is less than 10 points; finger combability during rinsing is poor.

(4) Firmness of hair after drying 20 men and women (24 to 43 years old) who are coloring are panelists. After washing, the hair was thoroughly dried with a drier, and then the feeling of elasticity was evaluated. The total score of 20 people was obtained, with 2 points for feeling that the hair had a feeling of elasticity, 1 point for feeling that the hair had a little elasticity, and 0 points for feeling that the hair did not have a feeling of elasticity. , was evaluated as follows.
⊚: The total score is 30 points or more; the hair after drying has a very strong and stiff feeling.
◯: Total score is 20 or more and less than 30 points; Hair feels stiff after drying.
Δ: Total score is 10 or more and less than 20 points; the hair after drying does not feel stiff and stiff.
x: The total score is less than 10 points; the hair does not feel stiff and stiff after drying.

◎：６０％以上；洗髪時に毛先の泡でも十分に垂れ落ち難い。
〇：４５％以上６０％未満；洗髪時に毛先の泡でも垂れ落ち難い。
△：３０％以上４５％未満；洗髪時に毛先の泡はかなり垂れ落ちる。
×：３０％未満；洗髪時に毛先の泡はほとんど垂れ落ちる。 (5) Difficulty of lather dripping off during hair washing A sample (a hair cleansing composition diluted to 5% by mass with deionized water) was placed in a miller (IFM-100, manufactured by Iwatani Sangyo Co., Ltd.) container. 100 mL was added and stirred for 20 seconds. After the stirring was stopped, foam was applied to 5 cm of the fixed wet hair ends (tips). The time point is defined as 0 seconds, and after 30 seconds, the weight of the foam dripping from the hair is measured. It was evaluated as follows. The ratio was calculated from the following formula.

⊚: 60% or more; foam at the ends of the hair does not easily run off during shampooing.
◯: 45% or more and less than 60%; Even bubbles at the tip of the hair do not drip easily during shampooing.
Δ: 30% or more and less than 45%; foam at the tip of the hair drips considerably during shampooing.
x: less than 30%; most of the foam at the tip of the hair drips down during shampooing.

Examples 1 to 10 were evaluated favorably in all items.
On the other hand, Comparative Example 1 contained sodium lauroylmethylalanine in place of the component (a), so the speed of foaming and finger combability during rinsing were good, but the elasticity of the foam was low. The feeling of elasticity of the hair after drying and the difficulty of dripping of the foam during shampooing were insufficient.
Comparative Example 2 contains sodium cocoyl methyl taurate instead of the component (a), so the speed of foaming, the elasticity of the foam (firmness), the finger combability during rinsing, and the firmness of the hair after drying are improved. It was good, but the lather did not drip easily during shampooing.
Comparative Example 3 contained lauryl betaine in place of the component (b), so the speed of foaming, the elasticity of the foam (body), the finger combability during rinsing, and the firmness of the hair after drying were good. However, the lather was not sufficiently resistant to dripping during washing.
Comparative Example 4 contained sodium lauroylmethylalanine in place of component (a) and lauryl betaine in place of component (b). , the elasticity of the foam, the elasticity of the hair after drying, and the difficulty of dripping of the foam when washing the hair were insufficient.
Comparative Example 5 contains sodium cocoyl methyl taurate instead of component (a) and lauryl betaine instead of component (b). The combing was good, but the feeling of elasticity of the hair after drying and the difficulty of dripping of the foam at the time of washing the hair were insufficient.

Formulation examples of the hair cleansing composition of the present invention are specifically shown below. The total amount was adjusted to 100% by mass using water in all formulation examples.

The hair cleansing compositions of these formulation examples are excellent in foaming speed and foam elasticity (resilience) during hair washing, good finger combability during rinsing, giving the hair a springy and resilient feeling after drying, and foaming during hair washing. The effect of the present invention was confirmed because it did not drip easily.

The hair cleansing composition of the present invention is excellent in foaming speed and elasticity (resilience) of the foam when washing the hair, good finger combability during rinsing, imparts elasticity to the hair after drying, and the foam drips when washing the hair. Since it does not come off easily, it can be suitably used as a shampoo, especially for people with short hair.

Claims (1)

(a) component: 3 to 30% by mass of acylhydroxyalkylalanine salt represented by formula (1), (b) component: 2 to 20% by mass of alkylhydroxysulfobetaine represented by formula (2), ( c) Component: A hair cleansing composition containing 50 to 95% by mass of water.

(In the formula, R ¹ CO represents an aliphatic acyl group having 8 to 22 carbon atoms, R ² represents a single bond or an alkylene group having 1 to 4 carbon atoms, and R ³ represents an alkylene group having 1 to 4 carbon atoms. and M represents an alkali metal atom, alkanolamine or basic amino acid.)

(In the formula, R ⁴ represents an alkyl group having 8 to 22 carbon atoms or an alkenyl group having 8 to 22 carbon atoms, and R ⁵ and R ⁶ each independently represents a methyl group or an ethyl group.)