JP6403946B2 - Shampoo composition - Google Patents

Description

  The present invention relates to a shampoo composition for washing hair.

  There are various demands for improving the feel of hair, and one of the demands is to improve the firmness and stiffness of the hair. Patent Document 1 describes a cosmetic for hair containing vitamin B6 as an agent for improving the firmness and stiffness of hair, and the vitamin B6 of the cosmetic activates cells of hair and hair follicles. It is said that the elasticity and stiffness of hair can be improved.

JP 2006-143649 A

  Since the hair elasticity and stiffness improvement by vitamin B6 of the cosmetic for hair disclosed in Patent Document 1 activates cells, it takes some time to realize the improvement effect. In order to shorten the period during which the firmness and stiffness are felt, there is a need for a proposal that can provide that feeling regardless of cell activation.

  Moreover, although there is disclosure of elasticity and stiffness improvement by vitamin B6, a cosmetic for hair containing vitamin B6 sometimes becomes yellow over time. Even if such coloring does not cause quality problems, there is a risk of anxiety to the consumer, so suppression of the coloring degree is desired.

  In view of the above circumstances, an object of the present invention is to provide a composition that is excellent in improving the firmness and firmness of the hair by blending vitamin B6 and can suppress the progress of coloring over time due to vitamin B6.

  As a result of intensive studies by the present inventors, if the target to be blended with vitamin B6 is a shampoo composition and the pH of the composition is set to 7.0 or less, the hair has excellent elasticity and firmness, The present inventors have found that the progression of coloring by vitamin B6 can be suppressed and have completed the present invention. That is, the composition according to the present invention is a shampoo composition containing vitamin B6 and / or a salt thereof and an anionic surfactant and having a pH of 7.0 or less.

  The shampoo composition according to the present invention preferably contains a cationized polymer and has a pH of 4.0 or more and 7.0 or less. By blending the cationized polymer, the entanglement between the finger and the hair when the shampoo composition is washed away from the hair can be suppressed. The entanglement suppression is preferably pH 4.0 or higher.

  The shampoo composition according to the present invention may have a transparent or translucent appearance. Since the shampoo composition containing vitamin B6 is colored when irradiated with light, in order to suppress this coloring, there is a method of making it opaque with a pearling agent or the like, but since the pH is set to 7.0 or less, The degree of color progression due to being transparent or translucent is suppressed.

  The hair treatment agent according to the present invention comprises the shampoo composition according to the present invention and a treatment composition containing a cationic surfactant.

  Since the composition of the present invention is obtained by blending vitamin B6 into a shampoo composition, it is excellent in improving the firmness and firmness of the hair, and has a pH of 7.0 or less. The progression of typical coloring can be suppressed.

Based on an embodiment of the present invention, the present invention will be described below.
The shampoo composition of the present embodiment (hereinafter, “shampoo composition” may be referred to as “shampoo”) is used for shampooing as well as known shampoos. Similarly to the treatment after the treatment with the known shampoo, the treatment composition (hereinafter, “treatment composition” may be referred to as “treatment”) is applied to the wet hair after the shampoo is washed away. Treatment treatment may be performed.

(shampoo)
The shampoo of this embodiment is one in which vitamin B6 and / or a salt thereof and an anionic surfactant are blended with water (the blending amount of water is, for example, 70% by mass or more). Moreover, you may mix | blend a well-known raw material for shampoos with the shampoo of this embodiment as an arbitrary raw material as needed.

Vitamin B6 and / or salt thereof By blending vitamin B6, vitamin B6 salt, or vitamin B6 and vitamin B6 salt with the shampoo of this embodiment, the firmness and firmness of the hair is improved. Even if vitamin B6 and / or its salt are added to the treatment, the firmness and firmness of the hair will be improved, but if the vitamin B6 and / or its salt is added to the shampoo, the firmness and firmness will be improved. (It is thought that the cationic surfactant added to the treatment adsorbs to the hair surface and greatly weakens the interaction between vitamin B6 or its salt and the hair. One shampoo contains no cationic surfactant. Or because it is formulated in a smaller amount than the treatment, the above interaction is unlikely to be significantly weakened like the treatment.Due to the difference in the interaction between this treatment and the shampoo, the combination of vitamin B6 or vitamin B6 salt will help It is expected that there will be a difference in the feel improvement.)

  It is considered that the improvement of the firmness and stiffness feeling due to vitamin B6 and / or its salt is due to the interaction between tryptophan, which is a constituent amino acid in hair, and vitamin B6. The interaction is that the fluorescence intensity (I) of tryptophan in the carboxymethylated keratin solution (I) and the fluorescence intensity of tryptophan in the solution (II) in which the solution (I) is further mixed with vitamin B6 as a test raw material. It can be confirmed from the large difference from (II) (vitamin B6 greatly inhibits the excitation light absorption of tryptophan by the interaction between vitamin B6 and tryptophan).

  The grounds that the interaction between tryptophan and vitamin B6 is large are shown based on the following solutions (I), (II), fluorescence intensity measurement, quenching rate, and Table 1.

Solution (I)
100 mM Tris buffer (trishydroxymethylaminomethane hydrochloride buffer) having a pH of 7.4 and an aqueous solution of carboxymethylated keratin (produced according to paragraphs 0089 to 0092 of JP2012-121831 A- A solution (I) was prepared by mixing an equal amount of an aqueous solution containing 10% by mass of an aqueous solution of keratin having an S—S—CH ₂ —COOH group.

Solution (II)
A solution (II) was prepared by mixing in the same manner as the solution (I) except that the test raw material was added to the Tris mixture. The test raw materials used and the concentrations of the test raw materials in each solution (II) are shown in Table 1 below.

Measurement of fluorescence intensity Using a spectrofluorometer F-4500 (manufactured by Hitachi High-Technologies Corporation), the fluorescence intensity was measured under the following measurement conditions.
Excitation wavelength: 295 nm
Fluorescence wavelength: 347.4nm
Scan speed: 240 nm / min
Slit width: 2.5nm
Photomultiplier voltage 950V

Quenching rate The “quenching rate” is a value calculated by “fluorescence wavelength fluorescence intensity (II) / fluorescence wavelength fluorescence intensity (I) × 100”. The smaller the value, the lower the fluorescence intensity depending on the test material. (The interaction between tryptophan and the test material is large).

In the said Table 1, the quenching rate of pyridoxine hydrochloride which is a vitamin B6 salt is significantly low compared with others. This reveals that the interaction between pyridoxine and tryptophan is large.

  Examples of the vitamin B6 include pyridoxine, pyridoxal, and pyridoxamine. Examples of the salt form of vitamin B6 include halogen salts such as hydrochloride.

  The shampoo of this embodiment contains one or more selected from vitamin B6 and its salts. The blending amount of vitamin B6 and its salt in the shampoo of the present embodiment should be set as appropriate, but it is preferably 0.01% by mass or more and 0.5% by mass or less, and 0.03% by mass or more and 0.2% % By mass or less is preferable, and 0.03% by mass or more and 0.1% by mass or less is more preferable. When the blending amount is 0.01% by mass or more, it is suitable for improving the firmness and firmness of the hair, and when it is 0.5% by mass or less, it is suitable for suppressing the progress of coloring of the shampoo.

Anionic Surfactant The shampoo of this embodiment may contain a known anionic surfactant as a hair washing component. Since hair is washed with an anionic surfactant, vitamin B6 and salts thereof are considered to easily interact with tryptophan in the hair.

  Examples of the anionic surfactant include carboxylic acid anionic surfactants such as N-acyl amino acid salts, fatty acid salts, alkyl ether carboxylates, fatty acid amide ether carboxylates, fatty acid amide ether carboxylic acids, and acyl lactates. Alkane sulfonate, α-olefin sulfonate, α-sulfo fatty acid methyl ester salt, acyl isethionate, alkyl glycidyl ether sulfonate, alkyl sulfosuccinate, alkyl sulfoacetate, alkyl benzene sulfonate, alkyl naphthalene sulfone Sulfonic acid anionic surfactants such as acid salts and N-acylmethyl taurate salts; alkyl sulfates, alkyl ether sulfates, alkyl aryl ether sulfates, fatty acid alkanolamide sulfates, fatty acid monoglyceride sulfates And sulfuric acid type anionic surfactants such as alkyl phosphates, polyoxyethylene alkyl ether phosphates, alkyl aryl ether phosphates, fatty acid amide ether phosphates and the like.

  The shampoo of this embodiment may contain one or more anionic surfactants. The compounding quantity of the anionic surfactant in the shampoo of this embodiment is not specifically limited, For example, they are 5 mass% or more and 15 mass% or less.

Optional raw material The optional raw material to be blended in the shampoo of the present embodiment may be a known raw material for shampoo, for example, anionic surfactant, cationic surfactant, amphoteric surfactant, nonionic surfactant, lower alcohol, It is a monohydric alcohol, a saccharide, a polymer compound, an amino acid, an animal or plant extract, an inorganic compound, a fragrance, or a preservative. In addition, since the cationic surfactant is easily adsorbed on the hair surface and weakens the interaction between vitamin B6 or a salt thereof and the hair, the blending amount in the shampoo when blending the cationic surfactant is, for example, 0.4. It is less than mass%.

  In order to suppress the entanglement of the hair when the shampoo is washed away, a cationized polymer is preferably blended. In order to obtain a shampoo having an appropriate viscosity, a nonionic surfactant is preferably blended.

Examples of the cationized polymer include polyquaternium-4 (hydroxyethylcellulose chloride dimethyldiallylammonium) and polyquaternium-10 (O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethylcellulose chloride).
Cationized cellulose such as guar hydroxypropyltrimonium chloride, and cationized guar gum such as hydroxypropyl guar hydroxypropyltrimonium chloride. One or two or more kinds of cationized polymers may be blended in the shampoo of the present embodiment, and the amount of the cationized polymer is appropriately set, for example, 0.1% by mass or more and 2% by mass or less. It is.

  Examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol tetra fatty acid ester, glycerin fatty acid ester, Examples include alkyl glucoside, sorbitan fatty acid ester, polyglycerin fatty acid ester, and sucrose fatty acid ester. One or two or more kinds of nonionic surfactants may be blended in the shampoo of the present embodiment, and the amount of the nonionic surfactant is appropriately set, for example, 0.1% by mass or more and 5% by mass or less. In order to improve the firmness and firmness, 1% by mass or less is preferable.

pH
The pH of the shampoo of this embodiment is 7.0 or less, preferably 6.5 or less, more preferably 6.0 or less, and even more preferably 5.5 or less. When the pH is 7.0 or less, the progress of coloring over time of the shampoo is suppressed (note that the coloring over time of the shampoo containing vitamin B6 or a salt thereof may be caused when the shampoo receives light or This is more likely when heated.) Further, the pH is preferably 4.0 or more, and preferably 4.5 or more. By setting it to 4.0 or more, it is advantageous to suppress entanglement of the hair by the cationized polymer when the shampoo is washed away.

  The shampoo of the present embodiment is as described above, and a shampoo having a viscosity that can be easily discharged from a pump-type container that is widely used in known shampoos is preferable. Further, the appearance of the shampoo of the present embodiment may be transparent, translucent, or opaque. Here, “transparent or translucent” refers to the transparency with which the background can be confirmed when the shampoo in a bottomed cylindrical glass container having a diameter of 4 cm is visually confirmed from the front.

(treatment)
The treatment of this embodiment is a mixture of a cationic surfactant and water (the amount of water is, for example, 70% by mass or more and 95% by mass or less), and is applied to wet hair treated with shampoo. It is to be washed with water. Moreover, you may mix | blend a well-known treatment raw material with the treatment of this embodiment as an arbitrary raw material as needed.

Cationic surfactant By adding a cationic surfactant to the treatment of the present embodiment, hair feel can be improved.

  Examples of the cationic surfactant include di-long-chain alkyldimethylammonium salts such as distearyldimethylammonium chloride, dicetyldimethylammonium chloride and dicocoyldimethylammonium chloride; behenyltrimethylammonium chloride, behenyltrimethylammonium methosulfate, stearyl Mono long-chain alkyltrimethylammonium salts such as trimethylammonium chloride, stearyltrimethylammonium bromide, cetyltrimethylammonium bromide; and long-chain alkoxyalkyltrimethylammonium salts such as stearoxypropyltrimethylammonium chloride. The term “long-chain alkyl” as used herein means a linear or branched alkyl group having 8 or more carbon atoms, and when the carbon number is 16 or more and 22 or less, irritation to the skin is suppressed. From the viewpoint of the feel imparted to hair and hair.

  When the cationic surfactant is blended in the shampoo of the present embodiment, the blending amount of the cationic surfactant in the treatment of the present embodiment is larger than the blending amount in the shampoo. The blending amount should be set as appropriate, and is, for example, 0.4% by mass or more and 5% by mass or less, and preferably 1% by mass or more and 3% by mass or less. By making it 0.4% by mass or more, it is preferable for improving hair feel, and by making it 5% by mass or less, it is preferable for suppressing skin irritation.

Optional raw material The optional raw material to be blended in the treatment of the present embodiment may be a known raw material for treatment, for example, higher alcohols, ester oils, fats and oils, hydrocarbons, waxes, polyhydric alcohols, lower alcohols, sugars, silicones, High molecular compounds, amino acids, animal and plant extracts, microorganism-derived substances, vitamins, inorganic compounds, fragrances, preservatives and the like. Higher alcohol is widely used as a raw material to be blended for adjusting the viscosity of treatment and improving the feel of hair.

  The higher alcohol to be blended in the treatment of the present embodiment is preferably one having 16 to 22 carbon atoms. Examples of the higher alcohol include linear chains such as cetyl alcohol, stearyl alcohol, aralkyl alcohol, and behenyl alcohol. Saturated alcohols; linear unsaturated alcohols such as oleyl alcohol; branched saturated alcohols such as hexyl decanol, octyldodecanol, isocetyl alcohol, and isostearyl alcohol. Among these higher alcohols, straight chain saturated alcohols having 16 to 22 carbon atoms are preferable, and cetyl alcohol and stearyl alcohol are preferable from the viewpoint of good handling properties and dispersion stability of oil droplets during treatment. The compounding quantity of the higher alcohol in the treatment of this embodiment is 3 mass% or more and 10 mass% or less, for example.

Dosage form, pH
The treatment of this embodiment is good in the form of a cream that is easy to apply to hair. Moreover, the pH of the treatment is, for example, not less than 3.0 and not more than 6.0.

  The present invention will be described below based on examples, but the present invention is not limited to the following examples.

  The clear shampoos of Examples 1a to 1c were mixed with water, pyridoxine hydrochloride, sodium polyoxyethylene lauryl ether sulfate (2EO), amidopropyl betaine laurate, 2-alkyl-N-carboxymethyl-N-hydroxyethyl. Imidazolinium betaine, coconut oil fatty acid N-methylethanolamide, alkyl acrylate / alkyl methacrylate / polyoxyethylene stearyl ether (20E.O.) copolymer, hydroxypropyl guar hydroxypropyltrimonium chloride, glycyrrhizic acid It was prepared by blending dipotassium, disodium edetate, preservatives, perfumes, and citric acid. The blending amounts of raw materials blended with water in the shampoo are as shown in Table 1 below.

  The shampoos of Examples 1a to 1c were sealed in a glass container and allowed to stand, and coloring over time was confirmed. This confirmation was performed under two conditions: left for 2 weeks in a room where sunlight enters (sunlight exposure test) and left for 2 weeks in a 50 ° C. constant temperature bath (high temperature aging test).

Table 2 below shows the raw materials blended with water for the production of shampoo, the pH of the shampoo, the coloring of the shampoo after the sun exposure test, and the coloring of the shampoo after the high temperature aging test. In confirming the coloring, the light yellow and transparent Example 1b was used as a reference, and the color intensity was compared for each test. Table 2 shows that at pH 7.0 or lower, coloring was suppressed as the pH decreased.

  A hair bundle having a history of treatment with an oxidative hair dye having a length of about 20 cm and about 5 g was treated with a shampoo and then treated. Then, the dry hair bundle was evaluated for its firmness and firmness. The combination of the shampoo and the treatment used here is a combination described in Tables 3 to 4. In Tables 3 to 4, shampoos SP1, SP2, SP3, and SP4 are pyridoxine hydrochloride, sodium polyoxyethylene lauryl ether sulfate (2E.O.), amidopropyl betaine laurate, 2-alkyl-N-carboxymethyl-N. -Hydroxyethyl imidazolinium betaine, coconut oil fatty acid N-methylethanolamide, glycerin, alkyl acrylate / alkyl methacrylate / methacrylic acid polyoxyethylene stearyl ether (20E.O.) copolymer, hydroxypropyl guar hydroxypropyltri Monium chloride, dipotassium glycyrrhizinate, edetate, preservative, fragrance, citric acid, and disodium hydrogen phosphate are mixed with water in the amounts shown in Table 5 below. TR1 and TR2 in Tables 3 to 4 are pyridoxine hydrochloride, behenyltrimethylammonium chloride, quaternium-91, stearyl alcohol, myristic acid PPG-3 benzyl ether, candelilla wax, cetyl palmitate, isononyl isononanoate, ceteramid ethyldietonium Hydrolyzed rice protein, calcium pantothenate, isopropanol, glycerin, and lactic acid are blended with water in the blending amounts shown in Table 6 below.

  Table 3 below shows the results of evaluating the firmness and stiffness of the hair bundles treated in Example 2a, Example 2b, and Comparative Example 2a, using the hair bundle treated in Comparative Example 2b as a reference. Here, the number of evaluators evaluated was 3, and “◯” in the table indicates that it is slightly better than the standard, and “◎” in the table indicates that it is better than the standard. means.

  Table 4 below shows the results of evaluating the firmness and stiffness of the hair bundles treated in Example 3b and Example 3c on the basis of the hair bundles treated in Example 3a. Here, the number of evaluators evaluated was 3, and “◯” in the table indicates that it is slightly better than the standard, and “◎” in the table indicates that it is better than the standard. means.

Claims (5)

Vitamin B6 and / or a salt thereof, an anionic surfactant, one or more cationized polymers selected from cationized cellulose and cationized guar gum are blended,
pH is 4.0 or more and 7.0 or less ,
A shampoo composition having a transparent or translucent appearance .   The shampoo composition according to claim 1, wherein a nonionic surfactant is blended.   The shampoo composition according to claim 1 or 2, wherein 70% by mass or more of water is blended. The shampoo composition according to any one of claims 1 to 3, wherein the blending amount of vitamin B6 and / or a salt thereof is 0.01% by mass or more .   A hair treatment agent comprising the shampoo composition according to any one of claims 1 to 4 and a treatment composition containing a cationic surfactant.