JP2014129286A - Hair cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hair cosmetic giving an excellent balance between coat feeling of the hair cosmetic during rinsing and after drying and no stickiness of the hair after drying, in addition to rich feeling when applied and hair softness during rinsing and after drying.SOLUTION: A hair cosmetic of the present invention contains a component (a) of amido amine represented by the general formula (I); a component (b) of an unsaturated fatty acid having a carbon number of 14 to 22: and a component (c) of a fatty alcohol having a carbon number of 12 to 28, where the content of the component (b) to the component (a) is 5.1% or more and 30% or less. In the formula, RCO represents a fatty acid residue where the ratio of a fatty acid residue having a carbon number of 20 or more is 75 mass% or more, the ratio of a fatty acid residue having a carbon number of 20 is 3 mass% or more and the ratio of a fatty acid residue having a carbon number of 22 is 70 to 95 mass%, among all fatty acid residues.

Description

  The present invention relates to a hair cosmetic.

  Hair cosmetics such as conditioners and treatment agents are used to improve the feel of the hair after washing. In addition to the smoothness and flexibility after drying, the hair cosmetics used after being washed away are required to have smoothness during rinsing, good fingering, and the like. Therefore, examples of hair cosmetics containing an amidoamine compound and an aliphatic alcohol include those described in Patent Documents 1 to 3.

  In Patent Document 1, a specific amidoamine is selected in order to give the hair a smooth feeling and a moist feeling from the time of application to the time of rinsing, and to give smoothness after combing and goodness of combing. Is described in a specific ratio, and is excellent in thickening properties (gel-forming properties). In Patent Document 2, in order to obtain a good feel of hair, the ratio of a specific amine and a saturated or unsaturated higher fatty acid used in the production thereof is 0.5 to 5% by mass with respect to the specific amine. And hair cosmetics with good emulsification stability such as oils. Patent Document 3 discloses a hair cosmetic comprising an amino-modified or ammonium-modified polymer silicone having a specific chemical structure in a specific amidoamine and a higher alcohol or higher fatty acid in order to impart smoothness and flexibility to the hair. Is described.

JP 2005-298447 A JP 2002-114648 A JP-A-9-71517

  However, the hair cosmetics described in Patent Documents 1 to 3 have room for improvement in the balance between the feeling of coating during rinsing, the feeling of coating after drying, and the non-stickiness after drying.

  The inventor pays attention to the relationship between a specific amidoamine and an unsaturated fatty acid, and combines the specific amidoamine with a specific proportion of an unsaturated fatty acid and a specific aliphatic alcohol to provide a rich feeling at the time of application, In addition to the softness of the hair after drying, it was found that a hair cosmetic excellent in the balance between the rinsing and drying hair cosmetic coating and the non-stickiness of the hair after drying was obtained.

That is, this invention provides the hair cosmetics which contain the following components (a)-(c) and whose content of the component (b) with respect to a component (a) is 5.1% or more and 30% or less. .
(A) Amidoamine represented by general formula (I)
[In the formula, R ¹ CO is a fatty acid residue having a ratio of fatty acid residues having 20 or more carbon atoms of 75% by mass or more, 3% by mass or more of fatty acid residues having 20 or more carbon atoms, and 22 carbon atoms in all fatty acid residues. The fatty acid residue whose ratio of a residue is 70-95 mass% is shown. ]
(B) unsaturated fatty acid having 14 to 22 carbon atoms (c) aliphatic alcohol having 12 to 28 carbon atoms

  According to the present invention, in addition to the rich feeling at the time of application, the softness of the hair after rinsing and after drying, the balance of the coat feeling of the hair cosmetic at the time of rinsing and after drying and the non-stickiness of the hair after drying An excellent hair cosmetic is provided.

It is the photograph shown in the AFM image of the mica substrate. (A) is the state to which the hair cosmetics of Example 1 adhered, (b) is the state of adhesion of the hair cosmetics of Comparative Example 1.

  Embodiments of the present invention will be described below.

Component (a) used in the present invention is an amidoamine represented by the general formula (I).

[In the formula, R ¹ CO is a fatty acid residue having a ratio of fatty acid residues having 20 or more carbon atoms of 75% by mass or more, 3% by mass or more of fatty acid residues having 20 or more carbon atoms, and 22 carbon atoms in all fatty acid residues. The fatty acid residue whose ratio of a residue is 70-95 mass% is shown. ]

In the component (a) used in the present invention, the composition of the fatty acid residue represented by R ¹ CO in the general formula (I) is preferably such that the proportion of the fatty acid residue having 20 or more carbon atoms in the total fatty acid residues. 90% by mass or more. Further, the proportion of the fatty acid residue having 20 carbon atoms is preferably 4% by mass or more, and more preferably 5% by mass or more. Furthermore, the proportion of fatty acid residues having 22 carbon atoms is preferably 80 to 95% by mass. In the present invention, the fatty acid residue means a site of R ¹ CO. R ¹ may be either a linear or branched hydrocarbon group or a saturated or unsaturated hydrocarbon group, but is preferably a linear alkyl group.

  In the amidoamine represented by the general formula (I), examples of the amidoamine having a fatty acid residue having 20 or more carbon atoms include arachidic acid dimethylaminopropylamide and behenic acid dimethylaminopropylamide. Among these, as the amidoamine having a fatty acid residue having 20 carbon atoms, arachidic acid dimethylaminopropylamide is exemplified, and as the amidoamine having a fatty acid residue having 22 carbon atoms, behenic acid dimethylaminopropylamide is exemplified.

The amidoamine represented by the general formula (I) includes at least a fatty acid residue having 20 and 22 carbon atoms, but other fatty acid residues, for example, an amidoamine having a fatty acid residue having less than 20 carbon atoms. May be included. Specific examples include lauric acid dimethylaminopropylamide, myristic acid dimethylaminopropylamide, palmitic acid dimethylaminopropylamide, stearic acid dimethylaminopropylamide, oleic acid dimethylaminopropylamide, and the like.
Moreover, commercial products, such as AMIDET APA-22 (Kao Co., Ltd.), can be used as an amide amine of general formula (I).

  Furthermore, an amidoamine salt may be formed in advance by using an amidoamine as the component (a) and an organic acid as the component (d) described later, and then contained in the hair cosmetic.

  The content of the component (a) is preferably 0.1% by mass or more and more preferably 0.5% by mass or more with respect to the entire hair cosmetic from the viewpoint of obtaining the softness of the hair at the time of rinsing. And 15 mass% or less is preferable, 10 mass% or less is more preferable, and 5 mass% or less is further more preferable. Moreover, 0.1 mass% or more and 15 mass% or less are preferable, 0.5 mass% or more and 10 mass% or less are more preferable, and 0.5 mass% or more and 5 mass% or less are further more preferable. Within this range, a good feel can be imparted to the hair.

  The component (b) used in the present invention is an unsaturated fatty acid having 14 to 22 carbon atoms, and more preferably an unsaturated fatty acid having 18 to 22 carbon atoms. Examples of the component (b) include oleic acid, elaidic acid, cetreic acid, erucic acid, brassic acid, linoleic acid, linolenic acid, arachidonic acid, stearic acid and the like. These fatty acids can be used alone or in combination of two or more.

  The content of the component (b) is 0.05% by mass or more based on the total amount of the hair cosmetic from the viewpoint of obtaining a rich feeling of the hair cosmetic at the time of application, and a coat feeling of the hair cosmetic after rinsing and drying. Preferably, 0.1% by mass or more is more preferable, containing 0.2% by mass or more is more preferable, 2.5% by mass or less is preferable, 1.5% by mass or less is more preferable, and 1% by mass or less is further preferable. preferable.

  The mass ratio (b / a) of the component (b) to the component (a) is as follows: rich feeling at the time of application, softness of the hair after rinsing and drying, coat feeling at the time of rinsing, and non-stickiness after drying From the viewpoint of a good coat feeling balance, the range is 5.1% or more and 30% or less, but in particular, 6% or more from the viewpoint of obtaining no stickiness after drying, rinsing and softness of hair after drying. Preferably, 27% or less is more preferable. And the range of 6% or more and 27% or less is preferable.

  Furthermore, you may contain a saturated fatty acid in the range which does not impair the effect of this invention. The content of the saturated fatty acid depends on the balance of the component (a) amidoamine, the component (b) unsaturated fatty acid, and the component (c) aliphatic alcohol described later, but the coating feeling during rinsing and the uniform coating feeling during drying In view of the above, the mass ratio to the component (a) amidoamine (component (a) / saturated fatty acid) is preferably 20% or less, more preferably 10% or less, and substantially no blending as a fatty acid is preferable. .

  Component (c) used in the present invention is an aliphatic alcohol having 12 to 28 carbon atoms, preferably an aliphatic alcohol having a linear or branched alkyl group or alkenyl group having 12 to 26 carbon atoms. In particular, a linear aliphatic alcohol having 16 to 22 carbon atoms is preferable. Specific examples include cetyl alcohol, stearyl alcohol, aralkyl alcohol, behenyl alcohol, and the like. It is preferable to use one or more selected from these.

  The content of the component (c) is preferably 0.5% by mass or more and more preferably 1% by mass or more with respect to the entire hair cosmetic from the viewpoint of imparting softness to the hair. Moreover, from a viewpoint which can reduce the stickiness of the hair after drying, 15 mass% or less is preferable and 10 mass% or less is more preferable. Moreover, 0.5 mass% or more and 15 mass% or less are preferable from the point of provision of a coating feeling and softness, and non-stickiness, and 1 mass% or more and 10 mass% or less are more preferable.

  From the viewpoint of product stability, the difference between the average carbon number of component (c) and the average carbon number of component (b) used in the present invention is preferably 10 or less, more preferably 7 or less, and even more preferably 4 or less.

  In the present invention, the combination of the component (a), the component (b) and the component (c) can be used to improve the stability of the product, obtain a coat feeling at the time of rinsing, and softness after drying. Can be given a good feel. Furthermore, it is possible to give a rich feeling at the time of application, good fingering at the time of rinsing, and smoothness with a uniform coat feeling on the hair after drying.

  Component (d) used in the present invention is an organic acid. Component (d) is preferably an organic acid having 10 or less carbon atoms, an acid having a short-chain alkyl group having 10 or less carbon atoms such as alkyl phosphoric acid, alkyl sulfonic acid and alkyl sulfuric acid; L-glutamic acid, L-aspartic acid Examples include acidic amino acids such as pyroglutamic acid, aromatic acids such as benzoic acid and p-toluenesulfonic acid, hydroxy acids, dicarboxylic acids, and the like. Examples of the hydroxy acid include hydroxy monocarboxylic acids such as glycolic acid, lactic acid, glyceric acid, gluconic acid, and pantothenic acid; hydroxydicarboxylic acids such as malic acid and tartaric acid; and hydroxytricarboxylic acids such as citric acid. Examples of the dicarboxylic acid include oxalic acid, malonic acid, maleic acid, succinic acid, glutaric acid and the like. Of these, acidic amino acids, hydroxy acids, and pyroglutamic acids are preferable from the viewpoint of providing an effect of imparting softness to hair. In particular, a hydroxy acid selected from glycolic acid, lactic acid, and malic acid, pyroglutamic acid, and L-glutamic acid are more preferable. It is preferable to use one or more selected from these.

  The content of the component (d) is preferably 0.1% by mass or more, preferably 0.3% by mass or more, based on the whole hair cosmetic, from the viewpoint of imparting softness during rinsing and reducing stickiness after drying. Is more preferable, and 0.5 mass% is further more preferable. Moreover, 10 mass% or less is preferable, 5 mass% or less is more preferable, and 3 mass% or less is further more preferable.

  The content of water is preferably 50% by mass or more and 98% by mass or less, and more preferably 60% by mass or more and 95% by mass or less in the hair cosmetic composition of the present invention.

  The hair cosmetic composition of the present invention is preferably adjusted to a pH of 2 to 6, particularly 2.5 to 5 at 25 ° C. when diluted 20 times by weight with water. Within this range, the good feel of hair after drying and the adsorptivity of hair cosmetics are improved. In addition to the organic acids described above, acidic substances such as inorganic acids and basic substances such as sodium hydroxide can be usually used as pH adjusters for adjusting the pH.

  In the hair cosmetic composition of the present invention, other components generally used in hair cosmetic compositions can be blended depending on the purpose. Surfactants such as cationic surfactants, anionic surfactants, nonionic surfactants and amphoteric surfactants other than component (a); silicones, hydrocarbon oils, lanolin derivatives, higher fatty acid esters, etc. Fats and oils; humectants such as glycerin; polymer compounds such as cationized cellulose, cationized guar gum, hydroxylated cellulose, and highly polymerized polyethylene oxide; other polysaccharides, polypeptides, pearling agents, solvents, liquid crystal forming bases, Aromatic sulfonic acids, dyes, fragrances, chelating agents, preservatives, antidandruff agents, antioxidants, and the like can be appropriately blended within a range that does not impair the object of the present invention.

  The hair cosmetic composition of the present invention can be made into a desired dosage form such as an aqueous solution, an ethanol solution, an emulsion, a suspension, a gel, a liquid crystal, a solid, and an aerosol.

  The hair cosmetic composition of the present invention is applied to the hair after shampooing the hair and rinsed with water for use, for example, hairlines, hair conditioners, hair treatments, hair packs, hair creams, It can be used for conditioning mousses.

  As mentioned above, although embodiment of this invention was described, these are illustrations of this invention and various structures other than the above are also employable.

  In relation to the above-described embodiment, the present invention further discloses the following composition, production method, or application.

  In the following Examples and Comparative Examples, “%” means “% by mass” unless otherwise specified.

(Example 1 and Comparative Examples 1-6)
A hair cosmetic (hair conditioner) was prepared and evaluated by the following method according to the formulation shown in Table 1. The results are shown in Table 1. The pH is a value measured at 25 ° C. by diluting each composition 20 times by weight with water.

(Production method)
A hair cosmetic is prepared by mixing and dissolving the component (a) to the component (c) and other oily components to prepare an oil phase and, if necessary, adding the component (d) to the aqueous phase obtained by heating and mixing. Got.

(Evaluation method)
Using a hair bundle of 20 g (length 30 cm, average diameter 80 μm) of Japanese female hair that had been treated once with straight perm and twice with bleach, five panelists performed sensory evaluation in the following manner.
After applying 2 g of the hair cosmetic composition shown in Table 1 to the hair bundle washed with 2 g of the standard shampoo of Table 2, the hair was thoroughly blended and then rinsed under running water of about 40 ° C. for about 30 seconds. . Next, towel drying was performed, and after drying with a dryer, evaluation after drying was performed. The evaluation was performed by five people, and the integrated value was obtained.

* 1 indicates a 25% aqueous solution.

(Evaluation criteria)
(1) Rich feeling after application 5: Very rich 4: Rich 3: Slightly rich 2: Not very rich 1: Not rich

(2) Coat feeling of hair cosmetics at the time of rinsing 5: Very coat feeling 4: Coat feeling 3: Slight coat feeling 2: Not much coat feeling 1: No coat feeling

(3) Softness of hair upon rinsing 5: very soft 4: soft 3: slightly soft 2: not very soft 1: not soft

(4) Non-sticky hair after drying 5: Not sticky at all 4: Not sticky 3: Not very sticky 2: Slightly sticky 1: Sticky

(5) Uniform coat feeling of hair cosmetic after drying 5: Very uniform coat feeling 4: Uniform coat feeling 3: Slightly uniform coat feeling 2: Slightly non-uniform coat feeling Yes 1: There is a non-uniform coating feeling

(6) Hair flexibility after drying 5: Very flexible 4: Flexible 3: Slightly flexible 2: Not very flexible 1: Not flexible

  From the results in Table 1, it was found that the hair cosmetics of the present invention had good results. The comparative examples 1 and 2 which do not contain a component (b) unsaturated fatty acid were inferior in any effect. In Comparative Example 3 using saturated fatty acids, the softness after rinsing and after drying, and the coating feeling after drying were inferior. Comparative Example 4 with a small amount of unsaturated fatty acid relative to amidoamine is less effective in terms of softness after rinsing and drying, and stickiness after drying. On the contrary, Comparative Example 5 with a large amount of unsaturated fatty acid is It was inferior in richness, non-stickiness after drying and feeling of coat. In Comparative Example 6 in which the amount of fatty acid residues of C20 or higher is low with amidoamine, all the effects were slightly inferior.

(Evaluation of adhesion state)
A 1.5 cm × 1.5 cm mica substrate (Nippon Mica Manufacturing Co., Ltd., raw mica) was immersed in water for 10 seconds and then pulled up.
Next, the standard shampoo having the above formulation was immersed in a diluted solution diluted 20 times by weight for 1 minute, then pulled up and washed with 20 ml of water.
Then, each was immersed for 1 minute in the 10 weight times dilution of the hair cosmetics of Example 1 and Comparative Example 1, and then pulled up and washed with 20 ml of water.
The cleaned mica substrate (MFP-3DTM manufactured by Asylum Technology Co., Ltd.) was observed with an atomic force microscope (AFM). The observation results are shown in FIG.

  1A is a hair cosmetic of Example 1, and FIG. 1B is an AFM image of a mica substrate to which the hair cosmetic of Comparative Example 1 is applied.

  From FIG. 1 (a), the hair cosmetic material of Example 1 is uniformly attached on the substrate, whereas from FIG. 1 (b), the hair cosmetic material of Comparative Example 1 has a plurality of hair cosmetics on the substrate. It was found that voids were scattered. This is considered to be because, in the hair cosmetic composition of Comparative Example 1, the α gel forms an aggregate due to the interaction between the amide amines and between the aliphatic alcohols, and does not form a uniform adsorption film.

(Examples 2-9)
A hair cosmetic (hair conditioner) was prepared according to the formulation shown in Table 3 and evaluated in the same manner as in Table 1. The results are shown in Table 3. The pH is a value measured at 25 ° C. by diluting each composition 20 times by weight with water.

  From the results in Table 3, it was found that the hair cosmetics of the present invention had good results.

Claims (6)

The following components (a) to (c):
(A) Amidoamine represented by general formula (I)
[In the formula, R ¹ CO is a fatty acid residue having a ratio of fatty acid residues having 20 or more carbon atoms of 75% by mass or more, 3% by mass or more of fatty acid residues having 20 or more carbon atoms, and 22 carbon atoms in all fatty acid residues. The fatty acid residue whose ratio of a residue is 70-95 mass% is shown. ]
(B) an unsaturated fatty acid having 14 to 22 carbon atoms (c) an aliphatic alcohol having 12 to 28 carbon atoms, and the content of the component (b) relative to the component (a) is 5.1% or more and 30% or less. Hair cosmetics.   Furthermore, the hair cosmetics of Claim 1 containing a component (d) organic acid.   The hair cosmetic according to claim 1 or 2, wherein the content of the component (a) is 0.1% by mass or more and 15% by mass or less with respect to the entire hair cosmetic.   Hair cosmetics as described in any one of Claims 1 thru | or 3 whose content of a component (c) is 0.5 to 15 mass% with respect to the said whole hair cosmetics.   The hair cosmetic according to any one of claims 1 to 4, comprising water in an amount of 50% by mass to 98% by mass with respect to the entire hair cosmetic.   The hair cosmetic composition according to any one of claims 1 to 5, comprising a saturated fatty acid in an amount of 20% or less based on the component (a).