JP2008308443A - Composition for treating hair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composition for treating hair, improving voluminousness of hair, while imparting moisture retaining property to the hair. <P>SOLUTION: The composition for treating hair comprises (A) L-theanine, (B) a phosphonic acid-based sequestering agent, e.g. etidronic acid, and (C) an aminocarboxylic acid-based sequestering agent, e.g. ethylenediamine tetraacetate, hydroxyethylethylenediamine triacetate and diethylenetriamine pentaacetate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hair treatment composition containing a sequestering agent.

  In recent years, with the diversification of hairstyles, there are increasing opportunities for hair to be treated with chemical treatment agents such as hair dyes, bleaching agents, permanent wave agents, and hair straighteners. Since these treatment agents contain, for example, an alkali agent, an oxidizing agent, or a reducing agent, hair that has been repeatedly treated with a chemical treatment agent tends to be damaged. Damaged hair has reduced moisture retention and elasticity of the hair, making it difficult to make a hairstyle with a sense of volume.

In hair treatment compositions such as hair treatments, shampoos, rinses and hair dye compositions, amino acids and polypeptides are generally known as components for imparting moisture retention to hair. Since amino acids and polypeptides have high affinity with hair composed of keratin proteins, they form a moisturizing protective film on the surface of the hair. For example, Patent Document 1 discloses a cosmetic containing an amino acid or a polypeptide. Patent Document 1 discloses a constitution in which a metal ion sequestering agent (chelating agent) is blended in a cosmetic that can also be applied to hair cosmetics in order to prevent off-flavors and discoloration of amino acids or polypeptides.
JP-A-8-231335 Japanese Patent Laid-Open No. 10-87448

  However, since the amino acids and polypeptides disclosed in Patent Document 1 have a high moisturizing effect, there is a problem that the moisture feeling of the hair may be excessive. For this reason, there is a problem that the entire hair becomes heavy and the effect of imparting a volume feeling to the hair cannot be sufficiently improved.

  By the way, Patent Document 2 discloses a hair styling agent containing a synthetic polymer such as polyvinylpyrrolidone as a compound that imparts hair styling properties. However, such a synthetic polymer has a problem that when applied to hair, the flexibility of the hair is lowered and the feel of the hair is inferior. Therefore, even if a synthetic polymer is used, it has been difficult to make a hairstyle with a voluminous feel while suppressing a decrease in touch to the hair.

  The present invention has been made by finding out that the above problems can be solved by blending L-theanine and a specific sequestering agent into a hair treatment composition as a result of intensive studies by the present inventors. It is. The objective of this invention is providing the composition for hair treatment which can improve the volume feeling of hair, providing moisture retention to hair.

  In order to achieve the above object, the hair treatment composition of the invention according to claim 1 comprises (A) L-theanine, (B) a phosphonic acid-based sequestering agent, and (C) an aminocarboxylic acid-based composition. It contains the metal ion sequestering agent.

  The invention described in claim 2 is the hair treatment composition according to claim 1, wherein the (B) phosphonic acid sequestering agent is at least one selected from etidronic acid and salts thereof. Features.

  The invention according to claim 3 is the hair treatment composition according to claim 1 or 2, wherein the (C) aminocarboxylic acid-based sequestering agent is ethylenediaminetetraacetic acid and its salts, hydroxyethyl It is at least one selected from ethylenediaminetriacetic acid and salts thereof, and diethylenetriaminepentaacetic acid and salts thereof.

  According to the present invention, it is possible to improve the hair volume while imparting moisture retention to the hair.

  Hereinafter, embodiments in which the present invention is embodied in a composition for treating hair will be described in detail. The hair treatment composition according to this embodiment contains (A) L-theanine, (B) a phosphonic acid-based sequestering agent, and (C) an aminocarboxylic acid-based sequestering agent.

  (A) L-theanine is used in combination with (B) a phosphonic acid-based sequestering agent and (C) an aminocarboxylic acid-based sequestering agent to impart moisture retention to the hair, Improve volume. (A) L-theanine alone has a hair repair effect. (A) L-theanine is a derivative of L-glutamic acid and is a kind of amino acid. L-theanine is a component that is abundant in tea leaves, especially gyokuro, and is known as an umami component of green tea. L-theanine can be obtained by extraction from tea leaves by a conventional method or by chemical synthesis. Any natural or synthetic L-theanine can be used in the hair treatment composition.

  The content of (A) L-theanine in the hair treatment composition is preferably 0.001 to 5 mass%, more preferably 0.01 to 3 mass%. (A) If the content of L-theanine is less than 0.001% by mass, the effect of improving the volume feeling for the hair cannot be sufficiently exhibited. (A) Even if the content of L-theanine exceeds 5% by mass, no further effect of improving the volume feeling on the hair can be obtained.

  (B) The phosphonic acid-based sequestering agent is used in combination with (A) L-theanine and (C) an aminocarboxylic acid-based sequestering agent to impart moisture retention to the hair. Improve volume. The sequestering agent refers to a compound having a ligand that has an action of binding to a metal ion to form a water-soluble complex and preventing an inherent reaction between the metal ion and another compound. Examples of (B) phosphonic acid sequestering agents include etidronic acid (also called hydroxyethanediphosphonic acid) and salts thereof, nitrilotrismethylenephosphonic acid and salts thereof, phosphonobutanetricarboxylic acid and salts thereof, and ethylenediamine. Examples include tetra (methylenephosphonic acid) and its salts. Specific examples of these (B) phosphonic acid sequestering agents may be used alone or in combination of two or more. Among these, etidronic acid and salts thereof having a high effect of improving the volume feeling of the hair while imparting moisture retention to the hair are more preferable.

  The content of the (B) phosphonic acid sequestering agent in the hair treatment composition is preferably 0.001 to 3% by mass, more preferably 0.005 to 2% by mass. (B) When the content of the phosphonic acid sequestering agent is less than 0.001% by mass, the effect of improving the volume feeling cannot be sufficiently exerted on the hair. (B) Even if the content of the phosphonic acid sequestering agent exceeds 3% by mass, the effect of improving the volume feeling for the hair is not obtained, and the hair feel may be deteriorated. .

  (C) Aminocarboxylic acid-based sequestering agent is used in combination with (A) L-theanine and (B) phosphonic acid-based sequestering agent to impart moisture retention to hair, Improve volume. (C) As an aminocarboxylic acid-based sequestering agent, for example, ethylenediaminetetraacetic acid and its salts, diethylenetriaminepentaacetic acid and its salts, hydroxyethylethylenediaminetriacetic acid and its salts, glycol etherdiaminetetraacetic acid and its salts, nitrilotriacetic acid And its salts, hydroxyethyliminodiacetic acid and its salts, dihydroxyethylglycine and its salts, triethylenetetraamine hexaacetic acid and its salts, 1,3-propanediaminetetraacetic acid and its salts, dicarboxymethylglutamic acid and its salts, And 1,3-diamino-2-hydroxypropanetetraacetic acid and salts thereof. Specific examples of these (C) aminocarboxylic acid-based sequestering agents may be used alone or in combination of two or more. Among these, ethylenediaminetetraacetic acid, hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, and salts thereof, which have a high effect of improving hair volume while imparting moisture retention to the hair, are more preferable.

  The content of the (C) aminocarboxylic acid-based sequestering agent in the hair treatment composition is preferably 0.001 to 4 mass%, more preferably 0.005 to 3 mass%. (C) When the content of the aminocarboxylic acid-based sequestering agent is less than 0.001% by mass, the effect of improving the volume feeling cannot be sufficiently exerted on the hair. (C) Even if the content of the aminocarboxylic acid-based sequestering agent exceeds 4% by mass, the effect of improving the volume feeling on the hair is not obtained, and the hair feel may be deteriorated. is there.

  The hair treatment composition may be, for example, water, a water-soluble polymer compound, an oil component, a polyhydric alcohol, a surfactant, a saccharide, an antiseptic, a chelating agent other than the above, a stabilizer, a pH adjuster, You may contain at least 1 type chosen from a plant extract, a herbal extract, vitamins, a fragrance | flavor, and a ultraviolet absorber.

  Water is used as a solvent or dispersion medium for each component. An appropriate amount of water is mixed with the surfactant to emulsify the hair treatment composition. The water content in the hair treatment composition is preferably 50 to 95% by mass, more preferably 70 to 90% by mass. If the water content is less than 50% by mass, emulsification of the hair treatment composition may be insufficient. If the water content exceeds 95% by mass, it becomes difficult to ensure the uniformity and stability of the hair treatment composition.

  Examples of the water-soluble polymer compound include gum arabic, gum karaya, gum tragacanth, sodium alginate, xanthan gum, cellulose derivatives, cross-linked polyacrylic acid, and polydimethylmethylene piperidinium chloride. Examples of the crosslinked polyacrylic acid include carbomers.

  The oily component imparts a moist feeling to the hair. Therefore, the hair treatment composition preferably contains an oily component. Examples of the oil component include fats and oils, waxes, higher alcohols, hydrocarbons, higher fatty acids, alkyl glyceryl ethers, esters, and silicones.

  Examples of oils and fats include olive oil, camellia oil, shea fat, almond oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, corn oil, rapeseed oil, rice bran oil, rice germ oil, grape seed oil, avocado oil , Macadamia nut oil, castor oil, coconut oil, and evening primrose oil. Examples of the waxes include beeswax, candelilla wax, carnauba wax, jojoba oil, and lanolin.

  Examples of higher alcohols include lauryl alcohol, myristyl alcohol, cetanol, stearyl alcohol, cetostearyl alcohol, aralkyl alcohol, behenyl alcohol, 2-hexyldecanol, isostearyl alcohol, 2-octyldodecanol, decyltetradecanol, oleyl alcohol, and Lanolin alcohol is mentioned.

  Examples of the hydrocarbon include paraffin, olefin oligomer, polyisobutene, hydrogenated polyisobutene, mineral oil, squalane, polybutene, polyethylene, microcrystalline wax, and petrolatum. Examples of the higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, 12-hydroxystearic acid, oleic acid, and lanolin fatty acid. Examples of the alkyl glyceryl ether include batyl alcohol, chimyl alcohol, ceralkyl alcohol, and isostearyl glyceryl ether.

  Examples of the esters include diisopropyl adipate, isopropyl myristate, cetyl octanoate, isononyl isononanoate, octyldodecyl myristate, isopropyl stearate, stearyl stearate, myristyl myristate, isotridecyl myristate, 2-ethylhexyl palmitate Octyldodecyl ricinoleate, fatty acid (C10-30) (cholesteryl / lanosteryl), cetyl lactate, lanolin acetate, ethylene glycol di-2-ethylhexanoate, pentaerythritol fatty acid ester, dipentaerythritol fatty acid ester, cetyl caprate, tricapryl Examples include glyceryl acid, diisostearyl malate, and dioctyl succinate.

  Examples of silicones include dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, terminal hydroxyl group-modified dimethylpolysiloxane, polyether-modified silicone, and an average polymerization degree of 650 to 10,000. Examples include highly polymerized silicone, amino-modified silicone, betaine-modified silicone, alkyl-modified silicone, alkoxy-modified silicone, mercapto-modified silicone, carboxy-modified silicone, and fluorine-modified silicone. Examples of the polyether-modified silicone include PEG-12 dimethicone. Specific examples of these oil components may be used alone or in combination of two or more.

  Examples of the polyhydric alcohol include glycerin, diglycerin, polyglycerin, ethylene glycol, isopentyldiol, propylene glycol (PG), dipropylene glycol (DPG), and 1,3-butylene glycol (BG).

  The surfactant is suitably blended to maintain the stability of the hair treatment composition as an emulsifier of the composition or a solubilizer of each component in the composition. Surfactants include ionic surfactants and nonionic surfactants. Examples of the ionic surfactant include a cationic surfactant, an anionic surfactant, and an amphoteric surfactant. Examples of the anionic surfactant include alkyl ether sulfate, alkyl sulfate, alkenyl ether sulfate, alkenyl sulfate, olefin sulfonate, alkane sulfonate, saturated or unsaturated fatty acid salt, alkyl or alkenyl ether carboxylate , Α-sulfone fatty acid salts, N-acylamino acid type surfactants, phosphate mono- or diester type surfactants, and sulfosuccinate esters. Examples of the alkyl ether sulfate include sodium laureth sulfate. Examples of the N-acylamino acid type surfactant include sodium N-lauroyl-L-glutamate. Examples of the counter ion of the anionic group of these surfactants include sodium ion, potassium ion, and triethanolamine.

  Examples of the cationic surfactant include alkyltrimethylammonium salt, alkenyltrimethylammonium salt, dialkyldimethylammonium salt, dialkenyldimethylammonium salt, lanolin fatty acid aminopropylethyldimethylammonium, and alkyloylamidopropyldimethylamine. Examples of the alkyl trimethyl ammonium salt include stearyl trimethyl ammonium chloride. Examples of the dialkyldimethylammonium salt include distearyldimethylammonium chloride. Examples of the counter ion of the cationic group of these surfactants include chloride ion, bromide ion, iodide ion, alkyl sulfate ion, and saccharin.

  Examples of amphoteric surfactants include cocobetaine, lauramidopropyl betaine, cocamidopropyl betaine, sodium lauroamphoacetate, and sodium cocoamphoacetate.

  Examples of the nonionic surfactant include polyoxyalkylene alkyl ether, polyoxyalkylene alkenyl ether, polyoxyethylene sorbitan fatty acid ester, sucrose fatty acid ester, sorbitan fatty acid ester, alkyl saccharide surfactant, glycerin fatty acid ester, Examples include polyoxyethylene hydrogenated castor oil, fatty acid alkanolamide, and alkylamine oxide. Examples of the polyoxyalkylene alkyl ether include laureth, ceteth, steareth, and palace. Specific examples of these surfactants may be used alone or in combination of two or more.

  Examples of the saccharide include sorbitol and maltose. Examples of the preservative include parabens. Examples of the stabilizer include phenacetin, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbituric acid, uric acid, and tannic acid. Examples of the pH adjuster include lactic acid, glycolic acid, tartaric acid, malic acid, pyrrolidone carboxylic acid (PCA), succinic acid, citric acid, glutamic acid, 2-amino-2-methyl-1-propanol (AMP), and triethanolamine. (TEA), and arginine.

  The hair treatment composition can be made into a liquid, mist, gel, foam, cream, or other dosage form. The hair treatment composition can be used as a hair care agent for imparting a moisturizing effect, for example, a shampoo, a rinse, and a hair treatment agent. This hair treatment composition may be used after being applied to the hair and washed away with water or warm water, or the same composition adhering to the hair may be used without being washed away with water or warm water. This hair treatment composition may be used as a hair styling agent. This hair treatment composition may be used after being applied to the hair and washed away with water or warm water, or the same composition adhering to the hair may be used without being washed away with water or warm water. The hair treatment composition may be used as a hair dyeing agent, for example, an oxidative hair dye and an acid hair dye, for example, by further blending a dye. This hair treatment composition may be applied as a bleaching agent, for example, by blending an oxidizing agent. This hair treatment composition may be used, for example, as a permanent wave agent, a hair straightener and a decoloring agent by blending a reducing agent.

According to the embodiment described in detail above, the following effects are exhibited.
(1) In this embodiment, (A) L-theanine, (B) a phosphonic acid-based sequestering agent, and (C) an aminocarboxylic acid-based sequestering agent were added to the hair treatment composition. Therefore, the hair volume feeling can be improved while imparting moisture retention to the hair.

  (2) In this embodiment, (A) L-theanine, (B) a phosphonic acid-based sequestering agent, and (C) an aminocarboxylic acid-based sequestering agent were added to the hair treatment composition. Therefore, it is possible to make a hair style with a sense of volume even for hair that has been damaged by repeated treatment with a chemical treatment agent, for example, a hair dye treatment agent, and whose hair has inherently reduced hair and stiffness. .

  (3) In this embodiment, (A) L-theanine, (B) a phosphonic acid-based sequestering agent, and (C) an aminocarboxylic acid-based sequestering agent were added to the hair treatment composition. Therefore, it is possible to improve the sustainability of moisture retention imparted to the hair.

  (4) In this embodiment, (B) at least one selected from etidronic acid and its salts is preferably used as the phosphonic acid sequestering agent. Therefore, the effect of imparting moisture retention to the hair and the effect of improving the volume of the hair can be further enhanced.

  (5) In this embodiment, (C) aminocarboxylic acid-based sequestering agent is at least one selected from ethylenediaminetetraacetic acid and salts thereof, hydroxyethylethylenediaminetriacetic acid and salts thereof, and diethylenetriaminepentaacetic acid and salts thereof. Are preferably used. Therefore, the effect of imparting moisture retention to the hair and the effect of improving the volume of the hair can be further enhanced.

  (6) In this embodiment, (A) L-theanine is mix | blended in the composition for hair treatment. Therefore, the composition for hair treatment exhibits a damage repair effect on hair damaged by, for example, hair dyeing treatment, decoloring treatment, permanent treatment and ultraviolet irradiation. Moreover, the persistence of the repair effect is also favorable.

The above embodiment can be modified as follows.
-In the said embodiment, you may divide | segment each component mix | blended with the composition for hair treatment, and you may comprise as a multiple dosage form.

  -In the said embodiment, you may apply to the composition for hair treatment comprised from the oxidation hair dye 1st agent which mix | blends an oxidation dye and an alkaline agent, and the oxidation hair dye 2nd agent which mix | blends an oxidation agent. . In this case, the components of (A) L-theanine, (B) phosphonic acid-based sequestering agent, and (C) aminocarboxylic acid-based sequestering agent are the oxidative hair dye first agent and oxidative dyeing. You may mix | blend with any of hair 1st agent.

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
First, a human black hair bundle or straight bob-style wig (black hair wig: see FIG. 1) that has been subjected to hair dyeing treatment with an oxidative hair dye is prepared. The oxidation hair dye comprises an oxidation hair dye first agent (hereinafter referred to as “first agent”) containing an oxidation dye and an alkali agent, and an oxidation hair dye second agent (hereinafter referred to as “second”) containing an oxidation agent. And "agent"). After preparing the 1st agent and 2nd agent of each example shown in Table 1, these 1st agent and 2nd agent are mixed by mass ratio of 1: 2, and the mixture is apply | coated to a human black hair bundle or a wig. , Left for 20 minutes. Thereafter, the human black hair bundle or wig was subjected to a hair dyeing treatment by rinsing the mixture adhering to the human black hair bundle or wig with water and drying. Using human black hair bundles or wigs thus treated with an oxidative hair dye, the following hair volume feeling, hair strength evaluation and hair moisture retention were evaluated, and the evaluation results are shown in Table 1, It is written together in 2. In Tables 1 and 2, the unit of the numerical value indicating the amount of each component is mass%.

(Hair volume (quantity))
The volume of hair was judged by visually observing the wig treated with the oxidative hair dye of each example. Regarding the evaluation of hair volume, if there is sufficient volume feeling due to sufficient elasticity in the vicinity of the hair root, it is considered “excellent”, and there is elasticity in the vicinity of the hair root and there is volume feeling. `` Good '', the elasticity near the hair root is slightly lost and the volume feeling is slightly inferior, `` Slightly bad '', and the elasticity near the hair root is lost and there is no volume feeling `` "Bad".

  In addition, in FIG. 1, evaluation of the volume feeling of hair is shown for reference. In the hair (wig) of FIG. 1, it was evaluated that the hair on the left side from the top of the head had sufficient elasticity (“excellent”) due to sufficient elasticity near the base of the hair. The hair on the right side from the top of the head was evaluated as having no elasticity (“bad”) due to loss of elasticity near the root of the hair.

(Tensile strength of hair)
For human black hair bundles before and after treatment with the oxidative hair dye of each example, the breaking stress value was measured using a tensile tester (Tensilon (trade name) UTM-II, manufactured by Toyo Baldwin), and the rate of increase of the value Was the strength increase rate (%).

  And it evaluated on the following reference | standard about the intensity | strength of hair from the calculated | required strength increase rate. A strength increase rate of 9% or more is considered “excellent”, a strength increase rate of 7% or more and less than 9% is “good”, and a strength increase rate of 5% or more and less than 7% is “slightly bad”. Less than 5% was regarded as “bad”.

(Moisture retention of hair)
The human black hair bundle treated with the oxidative hair dye of each example was first left in an atmosphere of 25 ° C. and 50% RH for 24 hours, and the initial hair mass (X) was measured. Next, the same hair bundle was further allowed to stand in an atmosphere of 25 ° C. and 10% RH for 24 hours, and the secondary hair mass (Y) was measured. Next, the same hair bundle with diphosphorus pentoxide was left in a desiccator under reduced pressure for one week, and the dry hair mass (Z) when completely dried was measured. The dry hair mass (Z) was subtracted from the initial hair mass (X) and the secondary hair mass (Y), respectively, to obtain hair moisture in each drying step. Hair treated with only water (control hair) was also subjected to the same drying treatment, and the moisture content of the control hair in each drying step was obtained. When the moisture content in each drying step in each example is 100%, the ratio ([hair moisture content in each example] × 100 / [control hair moisture content]) Expressed as (%). For each example, the average of the ratio (%) to the control hair in each step was calculated. In the evaluation of moisture retention, the case of 110% or more is “excellent”, the case of 105% or more and less than 110% is “good”, the case of 101% or more and less than 105% is “slightly bad”, and less than 101% The case of was considered "bad".

As shown in Tables 1 and 2, Examples 1 to 13 containing (A) L-theanine, (B) phosphonic acid-based sequestering agent, and (C) aminocarboxylic acid-based sequestering agent. Then, it was confirmed that all evaluations of hair volume feeling, tensile strength, and moisture retention were “excellent”. Further, as shown in Examples 1 to 8, each component of (A) L-theanine, (B) phosphonic acid-based sequestering agent, and (C) aminocarboxylic acid-based sequestering agent, It was confirmed that the evaluation was not affected even if it was blended with either the first agent or the second agent.

  On the other hand, (A) In Comparative Example 1 containing no L-theanine, as shown in Table 1, all evaluations of hair volume feeling, tensile strength, and moisture retention were reduced. In Comparative Examples 2 and 3 in which (B) a phosphonic acid-based sequestering agent and (C) an aminocarboxylic acid-based sequestering agent and glutamine as an amino acid are used in combination, the sense of volume, tensile strength, and moisture of hair It was confirmed that the retention was not improved.

  Comparative Examples 4 to 11 in which (A) L-theanine, (B) a phosphonic acid-based sequestering agent and (C) an aminocarboxylic acid-based sequestering agent are blended are used for hair volume feeling. Was confirmed not to improve. By using either (A) L-theanine of Comparative Examples 4 to 11 and (B) a phosphonic acid-based sequestering agent or (C) an aminocarboxylic acid-based sequestering agent in combination, moisture retention It can be seen that the property is slightly improved.

In addition, the description of (A)-(C) in a table | surface shows the compound corresponding to each component of this-application claim. On the other hand, the notation “a” in the table indicates a comparative compound of each component described in the claims of this application.
Next, the technical idea that can be grasped from the embodiment will be described below.

(A) The hair treatment composition used as an oxidative hair dye.
(B) Content of said (A) L-theanine is 0.001-5 mass%, The said composition for hair treatment characterized by the above-mentioned.

The reference figure which shows evaluation of the volume feeling of hair. The hair on the left side from the top of the head shows a case where the volume feeling is sufficient (“excellent”) due to sufficient elasticity near the root of the hair. The hair on the right side from the top of the head shows the case where the elasticity near the base of the hair is lost and there is no volume (“bad”).

Claims (3)

  A hair treatment composition comprising (A) L-theanine, (B) a phosphonic acid-based sequestering agent, and (C) an aminocarboxylic acid-based sequestering agent.   The hair treatment composition according to claim 1, wherein the (B) phosphonic acid sequestering agent is at least one selected from etidronic acid and salts thereof.   The (C) aminocarboxylic acid-based sequestering agent is at least one selected from ethylenediaminetetraacetic acid and salts thereof, hydroxyethylethylenediaminetriacetic acid and salts thereof, and diethylenetriaminepentaacetic acid and salts thereof. The hair treatment composition according to claim 1 or 2.