JP2021107335A - Aerosol product and hair processing method - Google Patents

Abstract

To provide an aerosol product and a hair processing method capable of achieving an excellent cool feeling when washing hair.SOLUTION: An aerosol product is configured to be used for hair washing, in the aerosol product, a container is filled with a liquid concentrate containing, an anionic surfactant and/or an amphoteric surfactant, water, and ethanol, and a propellant including dimethyl ether. A hair processing method performs hair washing by using the aerosol product in which, the liquid concentrate containing the anionic surfactant and/or the amphoteric surfactant, water and ethanol, and the propellant including dimethyl ether, are filled in the container.SELECTED DRAWING: None

Description

The present invention relates to an aerosol product suitable for hair cleaning applications and a hair treatment method using the product.

The hair cleaning composition in products for cleaning hair contains an anionic surfactant having an excellent cleaning effect and a cationized polymer that improves finger passage when the composition is washed and removed from the hair with water. Will be done.

Further, there is also a hair washing composition (shampoo) containing menthol, as proposed in Patent Document 1, for example, in response to the demand for a cool feeling especially in the summer.

Japanese Unexamined Patent Publication No. 2013-133319

As described above, a cool feeling may be required when washing hair, and in recent years when the domestic summer temperature is high, it is desired to propose a hair washing having an excellent cool feeling.

In view of the above circumstances, an object of the present invention is to provide an aerosol product capable of realizing an excellent cool feeling when washing hair, and a hair treatment method.

The aerosol product according to the present invention contains a stock solution and a propellant filled in a container, and the stock solution contains an anionic surfactant and / or an amphoteric surfactant, water, and ethanol. It has dimethyl ether as a propellant and is characterized by being used for cleaning hair.

The aerosol product according to the present invention preferably has a foam temperature of 15 ° C. or lower discharged from the container. At such a foam temperature, a more improved cool feeling can be obtained.

The aerosol product according to the present invention preferably has a gauge pressure of 0.80 MPa or less at 25 ° C. of the container. If the gauge pressure is 0.80 MPa or less, safety is enhanced even when used in a bathroom where the temperature tends to be high.

In the aerosol product according to the present invention, the D / B, which is the mass ratio of the dimethyl ether to the mass of the stock solution, is preferably 5/95 or more. When the D / B is 5/95 or more, it is suitable for improving the cool feeling.

In the aerosol product according to the present invention, the blending amount of ethanol in the undiluted solution is preferably 0.5% by mass or more. When the blending amount of ethanol is 0.5% by mass or more, the D / B can be easily set to 5/95 or more.

In addition, the hair treatment method according to the present invention is characterized by using the aerosol product according to the present invention.

According to the aerosol product used for washing hair according to the present invention, ethanol is further added to a stock solution containing an anionic surfactant and / or an amphoteric surfactant, and a propellant having dimethyl ether is filled in a container. Therefore, an excellent cool feeling can be realized.

Further, according to the hair treatment method according to the present invention, ethanol is further added to the stock solution containing an anionic surfactant and / or an amphoteric surfactant, and the hair is washed with an aerosol product having dimethyl ether as a propellant. , Excellent coolness can be realized.

The present invention will be described below based on embodiments of the present invention.
The aerosol product according to the present embodiment is a product in which a container is filled with a stock solution and a propellant, and is used for the purpose of washing hair using the discharged foam.

The undiluted solution of the present embodiment is a mixture of an anionic surfactant and / or amphoteric surfactant, ethanol, and water (the amount of water in this undiluted solution is, for example, 65% by mass or more). .. In the undiluted solution, the components contained in the known hair washing composition may be optionally added.

As described above, the stock solution of the present embodiment contains an anionic surfactant, an amphoteric surfactant, an anionic surfactant, or an amphoteric surfactant. These surfactants are components that remove stains on hair and scalp, and also contribute to the foamability of the undiluted solution. The total amount of the anionic surfactant and the amphoteric surfactant in the stock solution of the present embodiment is preferably 3.0% by mass or more and 25% by mass or less, preferably 5.0, from the viewpoint of effective stain removal and foaming property. More preferably, it is mass% or more and 20% by mass or less, and further preferably 7.0% by mass or more and 15% by mass or less.

When an anionic surfactant is added to the undiluted solution, one or more known anionic surfactants may be added. Examples of the anionic surfactant include N-acylamino acid salt and alkyl ether carboxylate. Carboic acid-based anionic surfactants such as; sulfonic acid-based anionic surfactants such as N-acylmethyl taurine salt; sulfate-based anionic surfactants such as alkyl sulfates and polyoxyethylene alkyl ether sulfates; polyoxyethylene sulfosuccinates Sulfosuccinate-based anionic surfactants such as alkyl acid acids; may be mentioned (examples of the salt form of the anionic surfactant include sodium salts, potassium salts, triethanol salts, monoethanol salts and the like). The blending amount of the anionic surfactant in the stock solution of the present embodiment is preferably 3.0% by mass or more and 25% by mass or less, and 5.0% by mass or more and 20% by mass, from the viewpoint of effective stain removal and foaming property. The following is more preferable, and 7.0% by mass or more and 15% by mass or less is further preferable.

When an amphoteric surfactant is added to the stock solution, one or more known amphoteric surfactants may be added. Examples of the amphoteric surfactant include alkyldimethylaminoacetate betaine and fatty acid amidopropyldimethylamino. Betaine acetate-type amphoteric surfactants such as betaine acetate, alkyldihydroxyethylamino betaine acetate; N-alkyl-N, N-dimethylammonium-N-propyl sulfonate, N-alkyl-N, N-dimethylammonium-N- Examples thereof include sulfobetaine-type amphoteric surfactants such as (2-hydroxypropyl) sulfonate, N-fatty acid amidopropyl-N, N-dimethylammonium-N- (2-hydroxypropyl) sulfonate. The blending amount of the amphoteric surfactant in the stock solution of the present embodiment is, for example, 3.0% by mass or more and 10% by mass or less.

As described above, ethanol is added to the stock solution of the present embodiment. When ethanol is added to the undiluted solution, the tendency of increasing the vessel gauge pressure caused by increasing the filling amount of dimethyl ether can be reduced. The blending amount of ethanol in the stock solution of the present embodiment is preferably 0.5% by mass or more, and 1.0% by mass or more, from the viewpoint of increasing the filling amount of dimethyl ether in order to improve the cool feeling while suppressing the gauge pressure of the container. Preferably, 1.5% by mass or more is more preferable, 2.0% by mass or more is further preferable, and 2.5% by mass or more is further preferable. On the other hand, the upper limit of the amount of ethanol blended in the undiluted solution is preferably 20% by mass, preferably 15% by mass, more preferably 10% by mass, from the viewpoint of suppressing irritation to the scalp and suppressing fading of the dyed hair. 0% by mass is more preferable.

As described above, the undiluted solution of the present embodiment can optionally contain the components contained in the known hair washing composition. Examples of the optional component include cationic polymers, lower alcohols, polyhydric alcohols, nonionic surfactants, sugars, amino acids, animal and plant extracts, inorganic compounds, fragrances, and preservatives.

If a cationic polymer is added to the undiluted solution, the finger passage property when the undiluted solution is washed away from the hair is improved. Examples of the cationic polymer include cationized cellulose, cationized guar gum, vinylpyrrolidone / N, N-dimethylaminoethylmethacrylic acid copolymer diethylsulfate, acrylamide / acrylic acid / dimethyldialylammonium chloride copolymer, N, Examples thereof include N-dimethylaminoethyl methacrylate diethylsulfate / N, N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer and the like. The blending amount of the cationic polymer in the undiluted solution is, for example, 0.1% by mass or more and 1.0% by mass or less.

The dosage form of the undiluted solution of the present embodiment is preferably liquid. The viscosity of the liquid stock solution is measured using a B-type viscometer (temperature: 25 ° C., rotor: appropriately set according to viscosity, rotor rotation speed: appropriately set according to viscosity), for example, viscosity. The value 60 seconds after the start of measurement is 10 mPa · s or more and 500 mPa · s or less.

The pH of the undiluted solution of this embodiment is, for example, 4.0 or more and 7.5 or less.

In the effervescent aerosol product of the present embodiment, the filling amount of the undiluted solution in the container is appropriately set. The filling amount is, for example, preferably 40 g or more and 65 g or less, and preferably 40 g or more and 60 g or less per 100 ml of the volume of the container. When the amount is 40 g or more, the period of use of the product is extended, and when the amount is 65 g or less, it is preferable to increase the amount of the propellant to be filled in the container.

The propellant of the present embodiment has dimethyl ether. Further, a known propellant other than dimethyl ether may be arbitrarily used.

As described above, the container in the aerosol product of this embodiment is filled with dimethyl ether. Dimethyl ether discharges foam from the container and realizes a decrease in the temperature of foam necessary for improving the cool feeling during hair washing. In the aerosol product of the present embodiment, the D / B, which is the mass ratio of dimethyl ether to the mass of the stock solution, is preferably 5/95 or more, preferably 10/90 or more, more preferably 15/85 or more, and 20/80 or more. More preferably, 25/75 or more is even more preferable, and 30/70 or more is most preferable. On the other hand, the upper limit of D / B is 40/60 from the viewpoint of suppressing the gauge pressure of the container to some extent.

The increase in the filling amount of dimethyl ether is accompanied by an increasing tendency of the gauge pressure of the container. Since hair cleaning products are often used indoors in bathrooms where the temperature is relatively high, the gauge pressure tends to increase due to dimethyl ether. Therefore, it is common general knowledge that hair cleaning products are not filled with dimethyl ether. However, in the present embodiment, since it can be reduced by blending ethanol with the stock solution, the D / B (mass ratio of dimethyl ether to the mass of the stock solution) can be set to 5/95 or more while reducing the increase in the gauge pressure.

In the present embodiment, carbon dioxide, which is known to have a blood circulation promoting effect, may be used as an arbitrary propellant. The amount of carbon dioxide to be filled at this time is preferably 0.3 parts by mass or more, preferably 0.5 parts by mass or more, with respect to 100 parts by mass of the undiluted solution. On the other hand, the upper limit of the filling amount of carbon dioxide is 1.5 parts by mass with respect to 100 parts by mass of the undiluted solution from the viewpoint of suppressing an increase in the container gauge pressure.

In this embodiment, the liquefied gas, isopentane, or the liquefied gas and isopentane may be any propellant for sustaining bubbles. However, regarding the temperature of the bubbles discharged from the container, since the liquefied gas and isopentan inhibit the temperature decrease due to dimethyl ether, the total amount of the liquefied gas and isopentan to be filled is less than 1.0 part by mass with respect to 100 parts by mass of the undiluted solution. Is preferable, less than 0.5 parts by mass is preferable, less than 0.3 parts by mass is more preferable, and less than 0.1 parts by mass is further preferable. On the other hand, the upper limit of the filling amount of carbon dioxide is 1.5 parts by mass with respect to 100 parts by mass of the undiluted solution from the viewpoint of suppressing an increase in the container gauge pressure.

The container in the aerosol product of the present embodiment is preferably a known pressure-resistant container, and the material thereof is, for example, a metal such as aluminum, aluminum alloy, tinplate, or steel. This container may be one in which a resin layer is laminated on the inner surface or one having an inner bag inside.

From the viewpoint of safety, the gauge pressure of the container in the aerosol product of the present embodiment is 0.80 MPa or less, preferably 0.75 MPa or less, preferably 0.70 MPa or less, and preferably 0.65 MPa or less under the temperature condition of 25 ° C. Is more preferable, 0.60 MPa or less is further preferable, and 0.55 MPa or less is even more preferable. Even if such a gauge pressure upper limit is set, since ethanol is mixed in the undiluted solution, the gauge pressure in the bathroom where the room temperature is high can be reduced. On the other hand, the lower limit of the gauge pressure at 25 ° C. is preferably 0.25 MPa, preferably 0.30 MPa, more preferably 0.35 MPa, and 0.40 MPa in order to increase the filling amount of dimethyl ether in the container. More preferred.

The aerosol product of this embodiment is used in a hair treatment method for hair washing. At the time of this use, the foam discharged from the container is applied to the head and washed with water. The temperature of the foam to be discharged is preferably 15 ° C. or lower, preferably 10 ° C. or lower, more preferably 5 ° C. or lower, and even more preferably 0 ° C. or lower, from the viewpoint of enhancing a cool feeling or a cool feeling. The temperature of the foam can be lowered by increasing the filling amount of dimethylethanol.

Hereinafter, the present invention will be described in detail based on Examples, but the present invention is not limitedly interpreted based on the description of this Example.

The aerosol products of Examples and Comparative Examples capable of discharging bubbles were produced by filling a container with a stock solution and a propellant. The details are as follows.

(Stock solution)
Na olefin (C14-16) sulfonate 4% by mass, Laures-11 Na acetate 3% by mass, Na cocoyl glutamate 2% by mass, Laures sulfosuccinate 2Na 1% by mass, lauryl betaine 3% by mass, water 79% by mass, ethanol 3% by mass, citric acid 0.6% by mass, Al lactate 0.5% by mass, polyquaternium-10 0.4% by mass, polyquaternium-52 0.1% by mass, PEG- A liquid stock solution containing 0.3% by mass of 32, 0.6% by mass of menthol, 0.2% by mass of orange oil, 0.7% by mass of preservative, and 0.4% by mass of fragrance was prepared. The pH of this stock solution was adjusted to about 5.

The above stock solution was used as the stock solution of Examples 1a and 2a to 2b. The stock solution of Example 1b was prepared by adding 5 parts by mass of ethanol to 100 parts by mass of the stock solution of Example 1a (the ethanol concentration in the stock solution of Example 1b was 7.6% by mass). The stock solution of Example 1c was prepared by adding 10 parts by mass of ethanol to 100 parts by mass of the stock solution of Example 1a (the ethanol concentration in the stock solution of Example 1c was 11.8% by mass). The undiluted solution of Example 1d was prepared by adding 20 parts by mass of ethanol to 100 parts by mass of the undiluted solution of Example 1a (the ethanol concentration in the undiluted solution of Example 1d was 19.2% by mass).

(container)
A metal container with a diameter of 53 mm and a height of 17 cm.

(Examples 1a to 1d)
The container was filled with a total amount of 160 g of the stock solution and the propellant (dimethyl ether only) to produce the aerosol products of Examples 1a to 1d. The mass ratio of the propellant to the undiluted solution (propellant / undiluted solution) is as shown in Table 1 below.

The container gauge pressures of the aerosol products of Examples 1a to 1d were measured at atmospheric temperatures of 25 ° C. and 50 ° C. Each gauge pressure is as shown in Table 1 below, and it can be confirmed that an increase in the blending amount of dimethyl ether is effective in lowering the gauge pressure.
In Table 1 below

(Examples 2a to 2b)
The container was filled with a total amount of 160 g of the stock solution and the propellant (dimethyl ether only) to produce the aerosol products of Examples 2a to 2b. The mass ratio of the propellant to the undiluted solution (propellant / undiluted solution) is as shown in Table 2 below.

The temperature of the discharged bubbles was measured using a digital thermometer "TM-150" manufactured by AS ONE Corporation. In this measurement, bubbles discharged from the aerosol products of Examples 2a to 2b were injected into a stainless steel container (with an internal volume of about 500 ml) in which a rod-shaped sensor of a digital thermometer was inserted. After that, the lowest temperature displayed by the digital thermometer was recorded. The temperature is as shown in Table 2 below, and it can be confirmed that increasing the filling amount of dimethyl ether is effective in lowering the temperature of the foam.

Claims (6)

An aerosol product in which the undiluted solution and propellant are filled in a container.
The undiluted solution contains an anionic surfactant and / or an amphoteric surfactant, water, and ethanol.
Having dimethyl ether as the propellant,
An aerosol product characterized by being used for hair cleaning. The aerosol product according to claim 1, wherein the temperature of the foam discharged from the container is 15 ° C. or lower. The aerosol product according to claim 1 or 2, wherein the gauge pressure of the container at 25 ° C. is 0.80 MPa or less. The aerosol product according to any one of claims 1 to 3, wherein the D / B, which is the mass ratio of the dimethyl ether to the mass of the stock solution, is 5/95 or more. The aerosol product according to any one of claims 1 to 4, wherein the blending amount of ethanol in the undiluted solution is 0.5% by mass or more. A hair treatment method, which comprises using the aerosol product according to any one of claims 1 to 5.