JP2000095651A - Scalp abluent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scalp abluent, excellent in effect of removing scalp sebum and promoting penetration of a hair growth agent or the like. SOLUTION: This scalp abluent contains (A) 10 to 60 wt.% of at least one type of surfactant selected from the group consisting of anionic, ampholytic and nonionic surfactants, and (B) 12 to 30 wt.% of a 1-3C monovalent alcohol, and has a viscosity of 100 mPa.s or less at 25 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scalp cleansing agent which has an excellent effect of removing sebum from the scalp and enhances penetration of a hair restorer or the like used after washing.

[0002]

2. Description of the Related Art Ordinary shampoos have an appropriate viscosity to be picked up by the hand and applied to hair for use. For this reason, most of the shampoo adheres to the hair, and it is difficult to sufficiently remove sebum stains on the scalp. If the sebum stains on the scalp cannot be sufficiently removed as described above, a hair restorer or the like used after washing cannot penetrate, and a sufficient hair restore effect cannot be obtained.

[0003] A scalp cleanser of the type which is applied to the scalp and wipes off without using water is known, but the towel to be wiped hardly reaches the scalp due to the presence of hair, and is not sufficient to remove sebum stains on the scalp. It is. Furthermore, there is a method of using a detergent after applying the sebum emulsified component to the scalp, but it is troublesome.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a scalp cleaner having an excellent effect of removing sebum stains on the scalp.

[0005]

Means for Solving the Problems The present inventors have found that a scalp detergent having a specific viscosity containing a surfactant and a monohydric alcohol having 1 to 3 carbon atoms in a specific ratio can be easily applied directly to the scalp, It has been found that the scalp has an excellent sebum removing effect and enhances penetration of a hair restorer or the like used after washing.

The present invention provides (A) 10 to 60% by weight of one or more surfactants selected from anionic surfactants, amphoteric surfactants and nonionic surfactants, and (B) a surfactant having 1 to 3 carbon atoms. An object of the present invention is to provide a scalp cleaner containing 12 to 30% by weight of a monohydric alcohol and having a viscosity at 25 ° C. of 100 mPa · s or less. The present invention also provides a scalp cleaning method for directly applying the scalp cleaning agent to the scalp for cleaning.

[0007]

DETAILED DESCRIPTION OF THE INVENTION Among the surfactants of the component (A) used in the present invention, examples of the anionic surfactant include alkyl sulfates, polyoxyethylene alkyl sulfates, alkylbenzene sulfonates, and fatty acid salts. , An amino acid-based surfactant, an α-olefin sulfonate, an α-sulfofatty acid ester salt, an alkyl phosphate ester salt, a sulfosuccinate ester salt, and the like. Of these, alkyl sulfate ester salt, polyoxyethylene alkyl sulfate Ester salts and fatty acid salts are preferred. Examples of the amphoteric surfactant include amidoamine-type amphoteric surfactants, imidazoline-based amphoteric surfactants, betaine-based amphoteric surfactants, alkyl betaines, amino betaines, sulfo betaines, and amine oxides. Amphoteric surfactants and amine oxides are preferred. Examples of the nonionic surfactant include, for example, polyoxyethylene alkyl ether, fatty acid glycerin ester, higher fatty acid monoethanolamide or diethanolamide or ethoxylate thereof, polyoxyethylene hydrogenated castor oil, and alkyl saccharide-based surfactants. Of these, polyoxyethylene alkyl ethers, alkyl saccharide-based surfactants, higher fatty acid monoethanolamide or diethanolamide are preferred.

Of these, preferred are polyoxyethylene alkyl ether sulfate, fatty acid amidopropyl betaine, and alkyl polyglucoside.

One or more surfactants of the component (A) can be used, and 10 to 60% by weight, preferably 20 to 40% by weight, particularly preferably 25 to 35% by weight, are incorporated in the whole composition. You. If it is less than 10% by weight, sufficient detergency cannot be obtained, and if it exceeds 60% by weight, irritation may be felt, which is not preferable.

The monohydric alcohol of component (B) used in the present invention has 1 to 3 carbon atoms, and ethanol is particularly preferred. One or more monohydric alcohols of the component (B) can be used, and 12 to 30% by weight, preferably 15 to 20% by weight is blended in the whole composition. If it is less than 12% by weight, sufficient sebum detergency cannot be obtained, and if it exceeds 30% by weight, foaming and feeling in use become poor.

The scalp cleansing composition of the present invention may further contain components used in ordinary shampoos, such as a medicinal agent, a preservative, a moisturizer, a coloring agent, a conditioning agent, a pearlizing agent, a fragrance, and the like. It can be appropriately compounded within a range that does not impair.

The scalp cleansing agent of the present invention can be produced according to a usual method, and has a viscosity at 25 ° C. of 100 mPa · s or less, preferably 50 mPa · s or less, particularly preferably 30 mPa · s or less. If the viscosity exceeds 100 mPa · s, it is difficult to apply directly to the scalp and the scalp cannot be sufficiently washed.

The scalp cleansing agent of the present invention is preferably applied directly to the scalp and washed, particularly preferably applied directly from a container to the scalp and washed. Further, it is convenient and preferable to fill the container directly onto the scalp. Such a container is not particularly limited, and examples thereof include those shown in FIG. The container of FIG. 1 is suitable for applying an appropriate amount by applying the tip to the scalp at the time of use.

[0014]

The scalp cleansing agent of the present invention can be easily applied directly to the scalp, has an excellent effect of removing sebum from the scalp, and can enhance penetration of a hair restorer used after washing.

[0015]

Example 1 A scalp detergent having the composition shown in Tables 1 and 2 was produced by a conventional method, and the sebum removing effect of the scalp was evaluated. The results are shown in Tables 1 and 2. In the examples, the viscosity was measured at 25 ° C. using a B-type viscometer.

(Evaluation method) (1) Sebum removing effect: Scalp sebum is extracted from acetone-ether (1: 1) solution by the following method and scalp sebum is determined from the amount of squalene determined by high performance liquid chromatography (HPLC) according to the following formula. The removal rate was determined, and the sebum removal rate of Comparative Product 1 was set to 1.
It is shown as a relative value when it is set to 0. Operation a: A glass cup having a diameter of 16 mm was placed on the scalp, about 2 ml of an acetone-ether (1: 1) solution was added, collected twice with a pipette, taken out and dried, and dissolved in a fixed amount of n-butanol. And the amount of squalene is determined by HPLC. Operation b: About 2 ml of the scalp cleanser is put into a glass cup having a diameter of 16 mm applied to the scalp, and is taken out with a pipette twice. Thereafter, the operation a is performed at the same site.

[0017]

(Equation 1)

[0018]

[Table 1]

[0019]

[Table 2]

As is clear from Tables 1 and 2, the scalp cleaners of the present invention were all excellent in the effect of removing sebum from the scalp. Also, the penetration of the hair restorer was increased after washing.

Example 2 A scalp detergent having the following composition was produced by a conventional method (viscosity: 25 mPa · s) and filled in the container shown in FIG.

[Table 3] (Components) (% by weight) Polyoxyethylene (2.0) sodium lauryl ether sulfate 18 lauric acid monoethanolamide 3 lauric acid amidopropyl betaine 2 ethanol 12 citric acid 0.1 purified water balance

Example 3 A scalp detergent having the following composition was produced by a conventional method (viscosity: 30 mPa · s) and filled in the container shown in FIG.

Table 4 (Components) (% by weight) Alkyl polyglucoside (same as in Example 1) 18 Amidopropyl betaine laurate 2 Ethanol 12 Purified water Balance

When the scalp cleansers obtained in Examples 2 and 3 were applied directly to the scalp from a container and used, the scalp cleansing power of the scalp was high. The penetration of the hair restorer after washing was also increased.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a container that can be directly applied to a scalp.

Claims (3)

[Claims] (A) 10 to 60% by weight of at least one surfactant selected from the group consisting of (A) an anionic surfactant, an amphoteric surfactant and a nonionic surfactant, and (B) one to three carbon atoms. A scalp cleaner containing 12 to 30% by weight of a polyhydric alcohol and having a viscosity at 25 ° C. of 100 mPa · s or less. 2. A scalp cleaning method wherein the scalp cleaning agent according to claim 1 is applied directly to the scalp for cleaning. 3. A scalp cleaning method wherein the scalp cleaning agent according to claim 1 is applied directly from a container to the scalp for cleaning.