JP7150389B2 - composition for scalp - Google Patents

Description

TECHNICAL FIELD The present invention relates to a composition for the scalp which can improve operability when massaging the scalp and which can improve finger combing through the hair after shampooing and rinsing.

In recent years, various scalp cosmetics have been developed for the purpose of improving the condition of the scalp. For example, one containing rice bran oil is known (Patent Documents 1 and 2).

JP 2007-302575 A JP 2016-69353 A

As a method for improving the condition of the scalp using a scalp cosmetic, there is, for example, a method of massaging the cosmetic-applied scalp with fingers and then washing the scalp including the hair with shampoo. However, if the hair gets entangled in the fingers when massaging the scalp, it becomes difficult to perform the massage. Therefore, the scalp cosmetic used in such a method has the function of improving the operability of the scalp massage, such as improving the finger passage of the hair so that the hair does not get entangled with the fingers during massage. preferably.

In addition, in the scalp cosmetic used in the above method, when washing away from the scalp and hair after massaging the scalp, in order to suppress the tangling of the hair on the fingers, etc., the hair is smoothed through the fingers. It is preferable that it also has a function to

The present invention has been made in view of the above circumstances, and its object is to improve the operability when massaging the scalp and to improve the finger combability of the hair after shampooing and rinsing. The object of the present invention is to provide a composition for

The scalp composition of the present invention, which has achieved the above object, contains (A) squalane, and (B) at least one of apricot kernel oil and rice bran oil, and the amount a of (A) is is 50% by mass or less, the amount b of (B) is 30 to 80% by mass, and the ratio a/b between a and b is 2.0 or less. .

According to the present invention, it is possible to provide a composition for the scalp which can improve the operability in massaging the scalp and improve the combability of the hair after shampooing and rinsing.

In the scalp composition of the present invention, (A) squalane and (B) at least one of apricot kernel oil and rice bran oil are blended, and the amount of (A) and (B) in the scalp composition was specified, and the ratio between the amount of (A) and the amount of (B) was adjusted. As a result, when the composition for scalp of the present invention is applied to the scalp, it can adhere to the scalp in an appropriate amount for massage, and the hair can be easily combed with fingers during massage. It is possible to improve the operability, and it is possible to improve the combability of the hair with fingers after shampooing and rinsing.

The present invention will be described below based on embodiments of the present invention.

In the composition for scalp according to the present embodiment, squalane, which is the component (A), is blended in an amount of 50% by mass or less. The blending amount a of component (A) in the scalp composition is determined by washing the scalp and hair after massage with the scalp composition with shampoo, rinsing with water, and then treating with a treatment agent. From the viewpoint of further enhancing finger combability on the hair when rinsed with water and dried (hereinafter referred to as "finger combability on the finished hair"), the content is preferably 40% by mass or less, and preferably 35% by mass or less. more preferred.

Also, if the amount of component (A) in the scalp composition is too small, the scalp and hair after being massaged with the scalp composition will be washed with shampoo and rinsed with water (hereinafter simply referred to as (referred to as "hair after washing") tends to decrease in finger combability. Therefore, from the viewpoint of better finger combing of the hair when washed away, the amount a of component (A) in the composition for scalp according to the present embodiment is preferably 5% by mass or more, and 15% by mass. % or more, more preferably 20% by mass or more.

The scalp composition according to the present embodiment may contain at least one of apricot kernel oil and rice bran oil as the component (B). It is more preferable that both apricot kernel oil and rice bran oil are blended since both finger combability and finger combability of finished hair are improved.

Blending amount b of component (B) in the composition for scalp according to the present embodiment [When either apricot kernel oil or rice bran oil is blended as component (B), it is the amount, and both are blended. If so, it is the total amount of them. same as below. ] is 30% by mass or more and 80% by mass or less, from the viewpoint of improving operability of scalp massage and smoothness of hair combing with fingers after rinsing. In addition, from the viewpoint of improving finger combing of the hair at the time of finishing, the blending amount b of the component (B) in the composition for scalp according to the present embodiment is preferably 40% by mass or more. It is preferably 65% by mass or less.

Furthermore, in the composition for hair according to the present embodiment, from the viewpoint of improving the operability of scalp massage and smoothness of finger combing of the hair after rinsing, the compounding amount a of the component (A) and the component (B) is 2.0 or less. From the viewpoint of improving finger combing of the hair at the time of finishing, the ratio a/b is preferably 1.2 or less, more preferably 1.0 or less, and 0.8 or less. It is more preferably 0.2 or more, more preferably 0.3 or more, and even more preferably 0.4 or more.

In addition, in the composition for scalp according to the present embodiment, the sum of the blending amount a of component (A) and the blending amount b of component (B) is preferably 50% by mass or more, and preferably 60% by mass or more. It is preferably 75% by mass or more, and even more preferably 80% by mass or more. The sum of the amount a of component (A) and the amount b of component (B) in the composition for scalp according to the present embodiment may be 100% by mass. When blending and exhibiting the function, it may be 90 mass % or less, for example.

Since rice bran oil has a relatively high melting point, a scalp composition containing a large amount of rice bran oil as component (B) becomes cloudy when placed at a low temperature (e.g., -2°C or below). may precipitate out. Therefore, when rice bran oil is used as the component (B), the blending amount b2 is preferably suppressed to 45% by mass or less, more preferably 40% by mass or less. Thereby, the low temperature stability of the composition for scalp can be improved.

When rice bran oil is used as component (B), apricot kernel oil is also used, and the total of the blending amount a of squalane and the blending amount b1 of apricot kernel oil as component (A) is 30% by mass or more. It is preferably 40% by mass or more, more preferably 45% by mass or more. Since squalane and apricot kernel oil function as a solvent for rice bran oil, by setting the total blending amount of squalane and apricot kernel oil as described above, precipitation of rice bran oil at low temperatures (eg, -2 ° C. or less) can be achieved. can be well suppressed, and the low temperature stability of the scalp composition can be enhanced.

In the scalp composition according to the present embodiment, the sum of the blending amount a of the component (A) and the blending amount b1 of the apricot kernel oil is set to 30% by mass or more (more preferably 40% by mass or more), and By setting the blending amount b2 of the oil to 45% by mass or less, precipitation of the rice bran oil at low temperatures can be suppressed more satisfactorily, and the low temperature stability can be further enhanced.

When apricot kernel oil and rice bran oil are used together as the component (B), the ratio b1/b2 of the blended amount b1 of apricot kernel oil to the blended amount b2 of rice bran oil is preferably 20 or less. From the viewpoint of further enhancing the finger combability of the finished hair, it is more preferably 5 or less, and still more preferably 3 or less.

As described above, the composition for scalp according to the present embodiment may be composed only of the components (A) and (B), but may also contain other additive components. Examples of such additive components include nonionic surfactants, higher alcohols, polyhydric alcohols, sugars, ester oils, fats and oils, liquid fatty acids, hydrocarbons, silicones, polymer compounds, animal and plant extracts, perfumes, preservatives, and UV absorbers. agents, water, etc. (excluding those corresponding to components (A) and (B)).

Specific examples of nonionic surfactants include polyoxyethylene alkyl ethers, sucrose fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene Ethylene sorbite fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil and the like. When the nonionic surfactant is blended into the composition for scalp, the blending amount is, for example, 1% by mass or less.

Specific examples of ester oils include esters of straight-chain fatty acids and lower alcohols such as isopropyl myristate, esters of straight-chain fatty acids and straight-chain higher alcohols such as cetyl caprylate, and straight-chain fatty acids such as 2-ethylhexyl palmitate. and branched alcohols, esters of branched fatty acids such as isopropyl isostearate and lower alcohols, esters of branched fatty acids such as cetyl ethylhexanoate and linear higher alcohols, fatty acids such as propylene glycol dicaprylate and polyols. Examples thereof include esters with hydric alcohols and esters with branched fatty acids such as 2-ethylhexyl isononanoate and branched alcohols. When the ester oil is blended into the composition for scalp, the blending amount is, for example, 5% by mass or more and 15% by mass or less.

When water is added to the composition for scalp, the amount is, for example, 1% by mass or less.

The viscosity of the composition for scalp according to the present embodiment at 25° C. is, for example, 10 to 500 mPa·s. The viscosity of the scalp composition here is measured using a rheometer [for example, HAAKE's rheometer "Rheo Stress 6000 (trade name)]", measurement temperature: 25 ° C., cone plate sensor diameter: 35 mm, cone Tilt angle of the plate sensor: 2° Shear rate dγ/dt: 10 s ⁻¹ This is a value measured in the steady flow curve mode.

The dosage form of the composition for scalp according to the present embodiment is preferably in a liquid form, since the scalp can be massaged more easily.

The scalp composition according to the present embodiment can be used, for example, by applying an appropriate amount to the wet scalp and hair and massaging the scalp. After massage, the scalp and hair may be washed with shampoo, rinsed with water, and dried.

The present invention will be described in detail below based on examples. However, the following examples do not limit the present invention. The amount of each component of the composition for scalp described in Tables 1 to 3 below is expressed in parts by mass, but the indication of the parts by mass is omitted, and only the numerical value representing the amount is indicated.

Examples 1-3 and Comparative Examples 1-3
Scalp compositions of Examples 1 to 3 and Comparative Examples 1 to 3 were prepared with the compositions shown in Table 1. All of the scalp compositions of Examples 1 to 3 and Comparative Examples 1 to 3 were transparent liquids at room temperature. In addition, all of these scalp compositions had viscosities at 25° C. within the range of 10 to 500 mPa·s.

The scalp compositions of Examples 1 to 3 and Comparative Examples 1 to 3 were evaluated according to the following procedures. A plurality of hair tresses (5 g) each having a length of 20 cm and collected from women's hair were prepared. After wetting each hair bundle with water, 0.5 g of each of the scalp compositions of Examples 1 to 3 and Comparative Examples 1 to 3 was applied to separate hair bundles. The finger combability of the hair (whether or not the hair is entangled with fingers) was evaluated.

Thereafter, each hair tress was washed with a liquid shampoo containing 13% by mass of an anionic surfactant and 0.4% by mass of cationized cellulose, and then rinsed with water, which was repeated twice. Then, finger combability of the hair after rinsing with water for the second time was evaluated.

After that, a cream treatment containing 1.4% by mass of cationic surfactant and 5.7% by mass of higher alcohol is applied to each hair tress, rinsed with water, dried, and finger combed on the finished hair. evaluated.

Each evaluation was made by four evaluators, and classified according to the following criteria. Those evaluated as ○○, ○ and △ can be said to be good.
○○: Evaluated as good by all four evaluators.
○: Evaluated as good by 3 evaluators.
△: Evaluated as good by two evaluators.
×: Evaluation by 3 evaluators as bad.
XX: Evaluated as bad by all four evaluators.

The above evaluation results are also shown in Table 1.

As shown in Table 1, Example 1 in which the components (A) and (B) are blended in appropriate amounts, and the ratio a/b of the blending amount of the component (A) and the blending amount of the component (B) is also appropriate. Scalp compositions Nos. 1 to 3 were good in both operability during scalp massage and finger combability after rinsing. In addition, the scalp composition of Example 2, which contains both apricot kernel oil and rice bran oil as the component (B) and has a more favorable blending amount of the component (A), is effective in improving the fingertips of the hair at the time of finishing. The streets were good.

On the other hand, the composition of Comparative Example 1, in which the component (A) was not blended, and the compositions of Comparative Examples 2 and 3, in which the ratio a/b was too large, were inferior in combing through the hair with fingers after rinsing. .

Examples 4-8
Scalp compositions of Examples 4 to 8 were prepared with the compositions shown in Table 2. All of the scalp compositions of Examples 4 to 8 were transparent liquids at room temperature. In addition, all of these scalp compositions had viscosities at 25° C. within the range of 10 to 500 mPa·s.

Using the scalp compositions of Examples 4 to 8, the hair bundles were treated in the same procedure as in the case of the scalp compositions such as Example 1, and the operability during scalp massage and the hair after rinsing were evaluated. The finger combability and finger combability of the finished hair were evaluated. These results are also shown in Table 2. Table 2 also shows the composition and evaluation results of the scalp composition of Example 2.

As shown in Table 2, the scalp compositions of Examples 4 to 8, like the composition of Example 2, have good operability during scalp massage and good finger combability on the hair after rinsing. In addition, the combability of the finished hair with fingers was also good. In addition, regarding the component (B), the compositions of Examples 5 to 7 containing both apricot kernel oil and rice bran oil (and the composition of Example 2) are the same as those of Example 4 containing only apricot kernel oil. Compared to the composition of Example 8, which contains only the composition and rice bran oil, the combability on the hair after rinsing is superior. The compositions of Examples 6 and 7 (furthermore, Example 2), in which the value of the ratio b1/b2 is suitable, were particularly excellent in the finger combability of the finished hair.

Examples 9 and 10
Scalp compositions of Examples 9 and 10 were prepared with the compositions shown in Table 3. The scalp compositions of Examples 9 and 10 were both transparent liquids at room temperature. In addition, all of these scalp compositions had viscosities at 25° C. within the range of 10 to 500 mPa·s.

Using the scalp compositions of Examples 9 and 10, hair tresses were treated in the same manner as the scalp compositions of Example 1 and so on. Then, operability at the time of scalp massage at that time, finger combability of the hair after rinsing, and finger combability of the hair at the time of finishing were evaluated. However, evaluation was performed by each of the five evaluators, and classification was performed according to the following criteria. It can be said that those evaluated as ◯◯ and ◯ are good.
○○: All five evaluators evaluated as good.
○: Evaluated as good by 3 or 4 evaluators.
x: evaluated as poor by 3 or 4 evaluators.
XX: Evaluated as bad by all five evaluators.

The above evaluation results are also shown in Table 3.

As shown in Table 3, the component (A) and the component (B) are blended in appropriate amounts, and the ratio a/b of the blending amount of the component (A) and the blending amount of the component (B) is also appropriate. , and 10, both the operability during scalp massage and the finger combability of the hair after rinsing were good. In addition, the scalp composition of Example 9, in which the blending amount of the component (A) was more suitable, had good finger combability on the finished hair.

Claims (7)

(A) squalane, and (B) at least one of apricot kernel oil and rice bran oil are blended,
The amount a of (A) is 50% by mass or less, the amount b of (B) is 30 to 80% by mass, and the ratio a/b between a and b is 2.0 or less. ,
A composition for the scalp, which is used by being applied to the scalp and hair, massaged into the scalp after application, and then washed off . 2. The composition for scalp according to claim 1, wherein the sum of the compounding amount a of (A) and the compounding amount b of (B) is 50% by mass or more. 3. The composition for scalp according to claim 1 or 2, wherein the blending amount a of (A) is 5% by mass or more. 4. The composition for scalp according to claim 3, wherein rice bran oil is blended as the (B), and the blending amount b2 is 45% by mass or less. 5. The composition for scalp according to claim 4, wherein both apricot kernel oil and rice bran oil are blended as (B). 6. The composition for the scalp according to claim 5, wherein the sum of the blending amount a of (A) and the blending amount b1 of the apricot kernel oil is 30% by mass or more. 7. The composition for scalp according to claim 5 or 6, wherein the ratio b1/b2 of the blended amount b1 of the apricot kernel oil and the blended amount b2 of the rice bran oil is 20 or less.