JP6739181B2 - Effervescent aerosol product and hair treatment method - Google Patents

Description

The present invention relates to a foamable aerosol product used by applying a foam-form undiluted solution discharged from a container to hair, and a hair treatment method using the product.

In hair cosmetics such as hair styling agents and non-rinsing treatments, if the dosage form when applied to hair is foam, there is an advantage that an appropriate amount can be easily applied to an arbitrary part of hair, unlike a liquid form. Focusing on such advantages, a foamable aerosol product in which a container is filled with a stock solution and a propellant corresponding to a hair cosmetic has been commercialized. It is widely known that a cationized polymer is added to a stock solution in order to adjust the feel of hair.

In order to improve the foaming of the undiluted solution discharged from the effervescent aerosol product, it is necessary to mix the surfactant. However, when an anionic surfactant is added to the stock solution together with the cationized polymer, both of them form a complex, and the direct feel-adjusting power of the hair by the cationized polymer decreases. Therefore, it is necessary to minimize the content of the anionic surfactant. In addition, even when a nonionic surfactant is blended, there is a tendency for the hair to pass through the fingers poorly, and it is necessary to control the blending to the minimum necessary.

On the other hand, when a cationic surfactant is blended with the cationized polymer, improvement in foaming and improvement in hair feel can be expected. Patent Document 1 discloses, as an example of compounding a cationic surfactant, a compound of stearyltrimethylammonium chloride and N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate (implementation of Patent Document 1). See Example 10). However, the blending of halides such as stearyltrimethylammonium chloride should be minimized to prevent corrosion of the metal container filled with the stock solution with halogen. In addition, by blending N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate, it is possible to improve the feel of hair without considering the problem of container corrosion. However, there was a problem that the foaming of the stock solution was not sufficient.

JP, 2004-262906, A

In view of the above circumstances, the present invention suppresses the blending amount of other surfactants when blending a cationized polymer and N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate into a stock solution. Even in the case, it is an object to provide a foamable aerosol product in which the stock solution to be discharged has a good foaming property, and a hair treatment method using the product.

As a result of earnest studies by the present inventors, methyl polysiloxane, which is generally known to have an antifoaming action, together with a cationized polymer and N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate. It was found that foaming was improved by blending the above with an emulsion, and the present invention was completed.

That is, the foamable aerosol product according to the present invention comprises a stock solution containing a cationized polymer, N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate, and a silicone emulsion, and a propellant. It is characterized by being filled in a container.

In the silicone emulsion of the present invention, the silicone is, for example, one or more selected from highly polymerized methylpolysiloxane, methylpolysiloxane having a viscosity of 200 cs or less, amino-modified silicone, and dimethiconol. The silicone emulsion preferably contains a nonionic surfactant in order to enhance the dispersibility of methylpolysiloxane.

The stock solution in the present invention preferably contains silicon dioxide. By adding silicon dioxide, the hair volume is increased.

When silicon dioxide is added to the stock solution of the present invention, polymethacryloylethyldimethyl betaine is preferably added. By blending this polymethacryloylethyl dimethyl betaine, it is possible to suppress aggregation and precipitation of silicon dioxide, which is an obstacle to the discharge of the stock solution from the container.

The hair treatment method according to the present invention is characterized in that the foam-shaped stock solution discharged from the foamable aerosol product of the present invention is applied to the hair. Since the undiluted solution contains a silicone emulsion, the undiluted solution that is well foamed and ejected from the container can be applied to any hair site.

According to the foamable aerosol product of the present invention, since the silicone emulsion is blended with the cationized polymer and the N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate in the stock solution, a stock solution with good foaming is obtained. It can be discharged from the container.

It is a picked-up image at the time of evaluating the foam retention of Example 1 and Comparative examples 1a to 1f.

The present invention will be described below based on the embodiments of the present invention.
The foamable aerosol product of the present embodiment has a container filled with a stock solution and a propellant, and the foamed stock solution is discharged from the container by the filled propellant.

(Undiluted solution)
The stock solution in the present embodiment is a mixture of a cationized polymer, N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate, a silicone emulsion, and water (amount of water in the stock solution). Is, for example, 90% by mass or more). Further, the stock solution may further contain known raw materials for hair cosmetics, as long as it is acceptable for practical use.

Cationized Polymer The cationized polymer blended in the stock solution in the present embodiment is a polymer having a cationizable substituent, and the substituent includes an amino group, an ammonium group and the like. Examples of the cationized polymer include vinylpyrrolidone-dimethylaminoethyl methacrylate copolymers such as polyquaternium-11; dimethyldiallylammonium-acrylamide copolymers such as polyquaternium-7 and polyquaternium-52; vinyl such as polyquaternium-16. Pyrrolidone/methylvinylimidazolium copolymer; In order to improve the smoothness of the surface of the hair dried after applying the foamed stock solution and the elasticity of the hair, polyquaternium-11 may be blended.

One or more kinds of cationized polymers are mixed in the above-mentioned stock solution. The blending amount of the cationized polymer in the stock solution is, for example, 0.1% by mass or more and 1.0% by mass or less.

N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate is added to the stock solution of the present embodiment. The blending amount of the N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate in the stock solution is, for example, 0.1% by mass or more and 0.6% by mass or less.

Silicone Emulsion The silicone emulsion blended in the stock solution of the present embodiment is a dispersion of silicone in water, and includes, for example, highly polymerized methyl polysiloxane, methyl polysiloxane having a viscosity of 200 cs or less, amino-modified silicone, and dimethiconol. One or two or more selected. When two or more kinds of silicone are used, the silicone emulsion is preferably a mixture of two or more kinds thereof dispersed in water.

Regarding the silicone in the silicone emulsion, the highly polymerized methyl polysiloxane is a methyl polysiloxane having an average degree of polymerization of 650 or more, and the methyl polysiloxane having a viscosity of 200 cs or less is a silicone having no fluidity or poor fluidity such as the highly polymerized methyl polysiloxane. It is also preferable that it is a solvent having a viscosity of 5 cs or more and 25 cs or less (here, the viscosity of methylpolysiloxane is a value measured according to the cosmetic raw material standard general test method, viscosity measurement method 1). ). The amino-modified silicone is, for example, an aminopropylmethylsiloxane/dimethylsiloxane copolymer.

The above silicone emulsion exists as a commercially available product. Examples of emulsion products in which methylpolysiloxane having a viscosity of 200 cs or less are dispersed include “BY22-068” and “BY22-080” manufactured by Toray Dow Corning. Examples of emulsion products in which a mixture of highly polymerized methyl polysiloxane and methyl polysiloxane having a viscosity of 200 cs or less are dispersed include "BY22-034", "BY22-055", and "BY22-060" manufactured by Toray Dow Corning. To be Examples of the product of the emulsion in which the amino-modified silicone is dispersed include "SM 8904 Cosmetic Emulsion" manufactured by Toray Dow Corning. Examples of emulsion products in which dimethiconol is dispersed include “XS65-C2173” and “Silsoft EM202C” manufactured by Momentive Performance Materials.

The silicone emulsion is, for example, one in which dimethylpolysiloxane is dispersed in water with a nonionic surfactant. Examples of the nonionic surfactant include polyoxyethylene alkyl ether and polyoxyethylene polyoxypropylene alkyl ether.

Optional Raw Material A known hair cosmetic raw material (optional raw material) may be added to the stock solution of the present embodiment as described above. This optional raw material is appropriately selected depending on the use and purpose of the foamable aerosol product of the present embodiment. As an optional raw material, anionic surfactant, cationic surfactant other than N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate, amphoteric surfactant, nonionic surfactant, higher alcohol, polyhydric alcohol , Saccharides, ester oils, oils and fats, silicones other than silicone contained in the silicone emulsion, polymer compounds other than cationized polymers, amino acids, fragrances, preservatives, sequestering agents, and ultraviolet absorbers.

When the anionic surfactant is blended, the amount of the undiluted solution is 0.1% by mass or less from the viewpoint of suppressing complex formation with the cationized polymer (it is desirable not to blend the anionic surfactant). .. When compounding a cationic surfactant and/or an amphoteric surfactant, the compounding of halides such as chlorine salts should be avoided from the viewpoint of suppressing corrosion of the container, and the compounding amount in the undiluted solution when compounding the halide. Is 0.1% by mass or less. When a nonionic surfactant is added, the amount is preferably 1.5% by mass or less, and more preferably 1.0% by mass or less in order to improve the feel of hair.

Higher alcohol is a component that adjusts the feel of hair. The higher alcohol is preferably a linear saturated alcohol such as cetyl alcohol or stearyl alcohol. The blending amount of the higher alcohol in the stock solution is preferably 0.1% by mass or more and 0.5% by mass or less in order to improve both foaming and foam retention.

Further, if the above-mentioned stock solution is mixed with silicon dioxide, which is a kind of inorganic powder, the volume of hair is increased. The blending amount of silicon dioxide in the stock solution is, for example, 0.1% by mass or more and 0.4% by mass or less.

When polymethacryloylethyl dimethyl betaine (polyquaternium-50) is blended together with the above silicon dioxide, the dispersibility of silicon dioxide in the stock solution is improved. The blending amount of polymethacryloylethyl dimethyl betaine in the stock solution is, for example, 0.2% by mass or more and 1.0% by mass or less.

pH
The pH of the stock solution of the present embodiment is not particularly limited, but is, for example, 4 or more and 6 or less.

(Propellant)
The propellant in the present embodiment is selected from known propellants. Known propellants include liquefied petroleum gas (hereinafter also referred to as "LPG") which is propane, n-butane, i-butane, and a mixture thereof; dimethyl ether, and a liquefied gas which is a mixture containing the same; carbon dioxide. , Nitrogen, nitrous oxide, compressed gas such as air; and the like. When LPG is filled, the balance between foaming and foam retention is excellent, and when carbon dioxide is filled, a blood circulation promoting effect on the skin can be expected.

In the foamable aerosol product of the present embodiment, the mass ratio of the undiluted solution and the propellant is, for example, undiluted solution:propellant=90:10 to 96:4.

(container)
The container is preferably made of metal and does not have an inexpensive inner bag. Examples of the metal used for forming the container include aluminum, aluminum alloy, tin plate, steel and the like. A resin layer may be laminated on the inner surface of the container.

(how to use)
The foamable aerosol product of the present embodiment is used by applying the foamed stock solution discharged from the container to an arbitrary hair part. For example, it is advisable to apply the foam-form undiluted solution to the root of the hair and dry it while the root is standing up. According to this method of use, the volume of hair is increased, and the addition of polyquaternium-11 and silicon dioxide to the stock solution makes volume increase easier.

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 the examples.
The stock solution and the propellant (LPG) were filled in a container having an inner volume of about 50 ml to manufacture the foamable aerosol products of Examples and Comparative Examples, and various evaluations were performed. Details are as follows.

(Undiluted solution)
N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate, vinylpyrrolidone N,N-dimethylaminoethyl methacrylic acid copolymer diethylsulfate (polyquaternium-11), silicone emulsion (viscosity 10cs methylpolysiloxane and Toray Dow Corning "BY22-034" containing 50% by mass of a mixture with a highly polymerized methylpolysiloxane, and dispersing the mixture with a nonionic surfactant, methylpolysiloxane (a Toray resin having a viscosity of 10 cs). "SH200 C FLUID" manufactured by Dow Corning Co., Ltd., a mixture of methyl polysiloxane and highly polymerized methyl polysiloxane (90 parts by mass of methyl polysiloxane having a viscosity of 10 cs and 10 parts by mass of highly polymerized methyl polysiloxane). Manufactured by "BY11-007"), aminoethylaminopropylmethylsiloxane/dimethylsiloxane copolymer, polyoxyethylene lauryl ether (2EO), polyoxyethylene lauryl ether (21EO), polyoxyethylene lauryl ether (4.2 EO), polyoxyethylene coconut oil fatty acid sorbitan (20 EO), phenoxyethanol, fragrance, polymethacryloylethyl dimethyl betaine (polyquaternium-50), and raw material selected from silicon dioxide, and water. By blending, stock solutions used in the foamable aerosol products of Example 1, Comparative Examples 1a-1f, and Examples 2a-2b were produced. The raw materials blended with water and the blending amounts thereof are shown in Tables 1 and 2 below.

(Foamable aerosol products)
After the stock solution was filled into the container, LPG was filled therein to produce the foamable aerosol products of Example 1, Comparative Examples 1a to 1f, and Examples 2a to 2b. The filling ratio of the stock solution and LPG in this production was 90 parts by mass:10 parts by mass of the stock solution:LPG.

(Evaluation of foaming)
The stock solution was discharged from the foamable aerosol product, and the foam-like stock solution immediately after the discharge was visually confirmed and evaluated by comparison with Comparative Example 1e and Comparative Example 1f. The evaluation criteria are as follows.
◯: Bubbling is better than the standard (Comparative Example 1e and Comparative Example 1f) —: Contrasting standard of foaming (Comparative Example 1e and Comparative Example 1f)
X: Foaming is worse than the standard (Comparative Example 1e and Comparative Example 1f)

(Evaluation of foam retention)
The time-dependent change in the state of the foam-form stock solution after the evaluation of foaming was visually confirmed and evaluated by comparison with Comparative Example 1d. The evaluation criteria are as follows.
◯: Foam retention is better than the standard (Comparative Example 1d) —: Foam retention comparison standard (Comparative Example 1d)
X: Poor foam retention than the standard (Comparative Example 1d)

(Evaluation of dispersibility of silicon dioxide in undiluted solution)
The stock solutions of Example 2a and Example 2b were compared in appearance immediately after production, and the superiority or inferiority of the dispersibility of silicon dioxide was evaluated. The evaluation criteria are as follows.
◯: Better than the standard (Example 2a) —: Standard

Tables 1 and 2 below show the raw materials blended in the stock solution and their blending amounts, the mass ratio of the stock solution and LPG filled in the container, and the evaluation results. In Tables 1 and 2, it can be confirmed that both "foaming" and "foam retention" were good by blending the silicone emulsion (Fig. 1 shows the foam retention of Example 1 and Comparative Examples 1a to 1f). This is the image taken at the time.). Further, in Table 2, it can be confirmed that the dispersibility of silicon dioxide was improved by the addition of polymethacryloylethyl dimethyl betaine.

Claims (6)

A stock solution containing a cationized polymer, N-coconut oil fatty acid acyl L-arginine ethyl DL-pyrrolidone carboxylate, and a silicone emulsion,
The propellant
Filled in a container ,
The cationized polymer blended in the stock solution has an amino group and/or an ammonium group as a substituent,
The silicone in the silicone emulsion blended in the stock solution is a highly polymerized methyl polysiloxane, a methyl polysiloxane having a viscosity of 200 cs or less, or a highly polymerized methyl polysiloxane and a methyl polysiloxane having a viscosity of 200 cs or less . Aerosol products. The cationized polymer to be blended in the stock solution is one or two selected from vinylpyrrolidone/dimethylaminoethyl methacrylate copolymer, dimethyldiallylammonium/acrylamide copolymer, vinylpyrrolidone/methylvinylimidazolium copolymer. The foamable aerosol product according to claim 1, which is one or more kinds . The foamable aerosol product according to claim 1 or 2, wherein the silicone emulsion contained in the stock solution contains a nonionic surfactant. The foamable aerosol product according to any one of claims 1 to 3, wherein the undiluted solution contains silicon dioxide. The foamable aerosol product according to claim 4, wherein polymethacryloylethyldimethyl betaine is blended in the stock solution. A hair treatment method comprising applying the foam-shaped stock solution discharged from the foamable aerosol product according to any one of claims 1 to 5 to hair.