JP2011201807A - Hair cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hair cosmetic which imparts smoothness to hair, prevents dryness under low humidity, has good styling properties, and does not affect treatment with a hair dye or a permanent wave agent.SOLUTION: The hair cosmetic includes 0.01-5 mass% of the following component (A) and 0.2-20 mass% of (B), based on the total amount: (A) an N-acyl peptide compound (the number of carbon atoms of an acyl group is 8-20; the number of a constituent amino acid residue is 2-20; and the percentage of the sum of the molecular weight of the acyl group based on the total molecular weight is 0.30-0.56); and (B) a polytetramethylene glycol derivative represented by the following general formula (1): RO-(CHCHCHCHO)-R(1), wherein Rand Rmay be the same or different, and are each a hydrogen atom or a 8-20C fatty acid residue; and n is the average addition mole number of an oxytetramethylene group, and is 5-25.

Description

The present invention relates to a hair cosmetic such as a hair rinse, a hair treatment, a hair conditioner, a hair cream, a hair lotion, a hair mist, a hair wax, and the like. In addition, the present invention relates to a hair cosmetic having good styling properties.

Hair is damaged by the influence of ultraviolet rays, the heat of a dryer, brushing, shampooing, etc., and the feeling of touch and fingering are likely to deteriorate. Furthermore, it is easy to cause troubles that cannot be styled into the desired hairstyle due to dryness, hair, hair, floats, etc., as a result of damage caused by chemical treatment such as dyeing or permanent hair. In recent years, an increasing number of people suffer from such hair problems, and there is an increasing need for hair cosmetics that have effects of protecting hair and improving touch.
Hair cosmetics such as hair rinses, hair treatments, and hair creams are generally emulsified with a cationic surfactant that excels in adsorptive properties to the hair. Widely used as a product that does not wash off). Oily ingredients are blended to form a protective film on the hair surface to give a smooth feel. For example, silicone oils such as dimethylpolysiloxane, hydrocarbon oils such as petrolatum, and animal and vegetable oils such as shea fat are used. ing. In particular, silicone oil is frequently used because it has a low surface tension and is well-familiar with hair and gives smoothness.
However, when silicone oil is blended as an oil component, there are problems such as the effect of improving damage to hair is not sufficient, and the type and composition ratio of silicone that can be blended is limited due to poor compatibility with other components. It was.

In view of such a situation, a hair cosmetic composition having good stability, in which a nonionic surfactant, a polytetramethylene glycol derivative, and a silicone compound are blended has been proposed (Patent Document 1). This hair cosmetic can give the hair a natural luster, improve the undulation of the tip of the hair, and can provide smooth fingering with the silicone compound, but the silicone compound remains in the hair after washing and dyes it. There was a problem that the drug was difficult to penetrate at the time of hair and permanent.
On the other hand, hair that contains mild anionic surfactants such as protein hydrolysates and amino acid derivatives in place of conventional cationic surfactants in response to the increasing consumer-oriented and safety orientation Treatment agents have been proposed. For example, Patent Document 2 discloses a hair treatment agent having an amino acid residue in a molecule and a polychain polyhydrophilic group compound having at least two acyl groups and two hydrophilic groups as an anionic surfactant. It is disclosed. Although this hair treatment agent gives firmness and smoothness to damaged hair and gives a feeling of unity and gloss, the hair conditioning effect of improving the smoothness and styling properties is still not fully satisfactory. .
In particular, under the low humidity environment in winter, there was a problem that smoothness and moist feeling were difficult to be sustained because it was easy to cause rustling.
Accordingly, there is a need for a hair cosmetic that does not easily cause papling even under low humidity, imparts smoothness to the hair, has good styling properties, and does not inhibit the penetration of hair dyes or permanent agents into the hair. It was.

JP 2009-235042 JP 2006-56874 A

The problem to be solved by the present invention is to provide hair with smoothness, prevent pattering under low humidity, have good styling properties, and do not affect the treatment of hair dyes and permanent agents. To provide cosmetics.

As a result of diligent research to solve the above problems, the present inventors have obtained a hair cosmetic excellent in the effect of improving the smoothness of the hair surface, dryness under low humidity, and styling properties by combining specific components. The present invention has been completed by finding that it can be obtained.
That is, the present invention is as follows.
(1) A hair cosmetic composition containing 0.01 to 5% by mass of component (A) and 0.2 to 20% by mass of (B) based on the total amount.
(A) N-acylated peptide compound (acyl group has 8 to 20 carbon atoms, 2 to 20 constituent amino acid residues, and the ratio of the sum of the molecular weight of the acyl group to the total molecular weight is 0.30 to 0) .56)
(B) Polytetramethylene glycol derivative R ¹ O— (CH ₂ CH ₂ CH ₂ CH ₂ O) _n —R ² (1) represented by the following general formula (1)
(R ¹ and R ² are the same or different hydrogen atoms or fatty acid residues having 8 to 20 carbon atoms, n is the average number of moles added of the oxytetramethylene group, and is 5 to 25. .)
(2) The hair cosmetic according to (1), wherein the component (A) is a condensate obtained by condensing N-acyl-L-glutamic acid and L-lysine at a molar ratio of 2: 1 or a salt thereof.

As a result of combining the N-acylated peptide compound and the polytetramethylene glycol derivative, the hair cosmetic composition of the present invention exhibits an unexpected synergistic effect as compared with those using a single component. That is, N-acylated peptide compounds are known to have a conditioning effect on hair, but are not necessarily sufficient to maintain a good conditioning effect under low humidity. In contrast, the hair cosmetic composition of the present invention combined with a polytetramethylene glycol derivative can provide excellent smoothness and styling properties in a normal environment, as well as maintain excellent touch even at low humidity. it can. Moreover, since the efficacy of the hair dye or permanent agent is not suppressed by the use of the hair cosmetic composition of the present invention, the hair cosmetic composition of the present invention is used in the present situation where hair dyes and permanents are frequently used on a daily basis. Very useful.

Hereinafter, the present invention will be described in detail.
The component (A) N-acylated peptide compound used in the hair cosmetic composition of the present invention is a compound in which the N-terminal amino group of the peptide chain or the amino group of the side chain amino acid contained in the peptide chain is amide-bonded with a fatty acid residue It is.
The peptide chain constituting the N-acylated peptide compound may be a natural peptide, a synthetic peptide, or a protein hydrolysate. Examples of natural peptides include glutathione, insulin, glucagon, and the like. Examples of synthetic peptides include polyglycine, polylysine, polyglutamic acid, polyserine, and the like. Examples of the protein source of the protein hydrolyzate include those derived from animals such as collagen, gelatin, keratin, silk fibroin, casein, and elastin, and those derived from plants such as soybean, almond, wheat, corn, and rice. It is done.

As the amino acid residue constituting the peptide chain, acidic amino acids such as glutamic acid and aspartic acid having two carboxyl groups, and basic amino acids such as lysine having two amino groups are more preferably contained as structural units.
The number of amino acid residues constituting the peptide chain is 2 to 20, preferably 3 to 10. When the number of constituent amino acid residues exceeds 20, the adsorptivity to the hair surface is low, and the effect of improving the smoothness of the hair surface, dryness under low humidity, and styling properties cannot be obtained.
The ratio of the sum of the molecular weights of the acyl groups to the total molecular weight of the N-acylated peptide compound (hereinafter abbreviated as “acyl group ratio”) is 0.30 to 0.56, preferably 0.30 to 0.00. 48, more preferably 0.40 to 0.48. If the ratio of the acyl group is less than 0.30, the effect of improving the padding and styling properties under low humidity cannot be obtained, and the emulsion stability of the preparation may be deteriorated. If it exceeds 0.56, the smoothness of the hair becomes insufficient.

The total molecular weight is a numerical value obtained by adding the sum of the molecular weight of the peptide chain and the molecular weight of the acyl group, and the ratio of the acyl group can be calculated by the following calculation formula.
Ratio of acyl group = sum of molecular weight of acyl group / (sum of molecular weight of acyl group + molecular weight of peptide chain)
In the above calculation formula, the number average molecular weight calculated by the following formula can be used as the molecular weight of the peptide chain.
Number average molecular weight = (average amino acid molecular weight−18) × average amino acid polymerization degree + 18
The average amino acid molecular weight is obtained by calculating the abundance ratio of each amino acid by amino acid analysis, and multiplying this by the molecular weight of each amino acid,
For example, the average amino acid molecular weight of hydrolyzed collagen described herein is 108. The average amino acid polymerization degree is a value obtained by dividing the total nitrogen amount value by the amino nitrogen amount value. When the peptide chain is present in the form of a salt, the molecular weight of the peptide chain is obtained by adding the molecular weight of the counter ion to the number average molecular weight obtained by the above formula.

The acyl group is a fatty acid residue having 8 to 20 carbon atoms. The fatty acid may be, for example, a saturated fatty acid, an unsaturated fatty acid, a branched fatty acid, or a hydroxyl group-substituted fatty acid. A linear saturated fatty acid is more preferable in terms of imparting a smooth feel to the hair.
The fatty acids include caprylic acid, nonanoic acid, decanoic acid, lauric acid, tridecanoic acid, isotridecanoic acid, myristic acid, pentadecanoic acid, palmitic acid, heptadecanoic acid, stearic acid, nonadecanoic acid, arachidic acid, dodecenoic acid, tetradecenoic acid, hexadecene. Examples include acids, palmitooleic acid, oleic acid, vacenoic acid, linoleic acid, linolenic acid, arachidonic acid, isostearic acid, and hydroxystearic acid, and one or more of these may be used. A saturated fatty acid having 12 to 18 carbon atoms is preferable, and lauric acid, myristic acid, palmitic acid, and stearic acid are more preferable. When the carbon number is less than 8, the effect of improving the styling property and the dryness under low humidity is insufficient, and when the carbon number exceeds 20, the smoothness of the hair cannot be obtained.

N-acylated peptide compounds include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium, organic ammonium such as triethanolamine and 2-amino-2-methyl-1,3-propanediol It may be present in any form of a basic amino acid salt such as a salt, arginine, lysine, etc., but is preferably present in the form of a sodium salt, potassium salt or organic ammonium salt, and more preferably a sodium salt. When the N-acylated peptide compound is a polybasic acid, it may be present in the form of a partial salt.
Examples of such N-acylated peptide compounds include condensates of fatty acids and protein hydrolysates, and commercially available products include Promois EU-118D (isostearoyl hydrolyzed collagen, 2-amino-2- Methyl 1,3-propanediol salt, manufactured by Seiwa Kasei Co., Ltd.).

Furthermore, as the N-acylated peptide compound, a condensate obtained by condensing N-acyl-L-glutamic acid and L-lysine at a molar ratio of 2: 1 or a salt thereof can be blended. As a commercial product of such a compound, for example, Perisea L-30 (a sodium salt of a condensate of N-lauroyl-L-glutamic acid and L-lysine (molar ratio 2: 1), manufactured by Asahi Kasei Chemicals Corporation) can be mentioned. .

The component (B) polytetramethylene glycol derivative forms a uniform film on the hair surface by the interaction with the N-acylated peptide compound of the component (A) adsorbed on the hair surface and imparts smoothness to the hair. Improves styling and dryness under low humidity.
In the polyalkylene glycol derivative represented by the formula (1), R ¹ and R ² are the same or different hydrogen atoms or fatty acid residues having 8 to 20 carbon atoms.

The fatty acid residue having 8 to 20 carbon atoms as R ¹ and R ² is an acyl group derived from a fatty acid having 8 to 20 carbon atoms, and the fatty acid may be, for example, a saturated fatty acid or an unsaturated fatty acid, or branched. Fatty acids and hydroxyl group-substituted fatty acids may be used, but saturated fatty acids are preferred in terms of providing stability of the preparation and a smooth feel to the hair.
Examples of fatty acids include capric acid, nonanoic acid, decanoic acid, lauric acid, tridecanoic acid, isotridecanoic acid, myristic acid, pentadecanoic acid, palmitic acid, heptadecanoic acid, stearic acid, nonadecanoic acid, arachidic acid, dodecenoic acid, tetradecenoic acid, hexadecene. Examples thereof include acid, palmitooleic acid, oleic acid, vacenoic acid, linoleic acid, linolenic acid, arachidonic acid, isostearic acid, hydroxystearic acid and the like, and one or more of these may be used.
R ¹ and R ² are preferably fatty acid residues having 14 to 18 carbon atoms, such as myristic acid, palmitic acid, stearic acid, isostearic acid, and more preferably a palmitic acid residue. If the carbon number is less than 8, the effect of improving the dryness under low humidity is insufficient, and if it exceeds 20 carbon, it is difficult to obtain smooth hair.

The ratio of the fatty acid residues having 8 to 20 carbon atoms in R ¹ and R ² (hereinafter “the ratio of fatty acid residues”) is preferably 0.65 to 0.95, more preferably 0.70 to 0. 0.85, more preferably 0.70 to 0.80. If it is less than 0.65, the effect of improving the styling properties under low humidity may not be sufficient, and if it exceeds 0.95, a feeling such as stickiness will occur and the hair surface will not be smooth. There is.

The ratio of the fatty acid residue can be calculated by the following method by measuring the ester value (EV) / hydroxyl value (OHV) of the esterified product.
Fatty acid residue ratio = [EV of esterified product / (EV of esterified product + OHV of esterified product)]
EV of esterified product = Saponification value of esterified product (SV)-Acid value of esterified product (AV)
OHV, SV, and AV of the esterified product can be measured according to the method described in Japanese Industrial Standard (JIS).
OHV; JIS K-1557 6.4
SV: JIS K-0070 3.1
AV; JIS K-0070 4.1

N which is the average addition mole number of the oxytetramethylene group is 5 to 25, preferably 7 to 20, and more preferably 8 to 12.
When n is less than 5, smoothness of the hair surface cannot be obtained, and the improvement effect on the padding and styling properties under low humidity is not sufficient. If n exceeds 25, the hair surface cannot be smooth.

The polytetramethylene glycol derivative (B) represented by the formula (1) of the present invention can be produced by a known method. For example, it can be obtained by an esterification reaction between polytetramethylene glycol and a fatty acid or a transesterification reaction with a fatty acid ester.

(A) A component is 0.01-5 mass% in hair cosmetics, Preferably it is 0.1-3 mass%, More preferably, 0.3-1 mass% is contained. When the amount is less than 0.01% by mass, the hair surface is not smooth, and the effect of improving the styling property is not sufficient at low humidity. The hair surface is not smooth enough. In addition, (A) component may be used independently and may use 2 or more types together.
(B) A component is contained in hair cosmetics by 0.2-20 mass%, Preferably it is 0.5-15 mass%, More preferably, it is contained in the ratio of 1.0-10 mass%. When the amount is less than 0.2% by mass, the hair surface is not smooth, and the effect of improving the styling property is insufficient under low humidity. When the amount exceeds 20% by mass, the hair surface is smooth. And the storage stability of the preparation may be adversely affected. (B) A component may be used independently and may use 2 or more types together.

The hair cosmetic composition of the present invention can be used in combination with a surfactant as long as the effects of the present invention are not impaired. For example, any of anionic, nonionic, amphoteric, and cationic surfactants may be used, but anionic surfactants such as fatty acid soaps, polyoxyethylene alkyl ether salts, N-acyl alkyl taurine salts, N-acyl amino acid salts, etc. Is preferable from the viewpoint of formulation stability.
Moreover, the hair cosmetics of this invention may contain the additive and the solvent as needed.
As additives, various components generally used in cosmetics, quasi drugs, and pharmaceuticals can be blended within the range not impairing the effects of the present invention. For example, hydrocarbons, higher alcohols, higher fatty acids and their triglycerides, ester oils, animal and vegetable oils, vitamins, UV absorbers, antioxidants, sequestering agents, thickeners, preservatives, dyes, pigments, fragrances, etc. Can be mentioned.
As the solvent, water, ethanol, 1,3-butylene glycol, dipropylene glycol, propylene glycol, glycerin, or the like can be used as necessary.

The form of the hair cosmetic composition of the present invention is not particularly limited, and may be any of liquid, cream, gel, and wax. Hair gel, hair milk, hair wax, hair mist, hair rinse, hair oil, hair conditioner, hair treatment, or rinse-in It can be used in various forms such as shampoo. Further, it may be either an in-bath washed out after application or an out-bath not washed out, but it is more preferably used in an out bath hair conditioner, hair treatment or the like.

The present invention will be described in more detail with reference to examples below, but the present invention is not limited thereto.
As the N-acylated peptide compound of component (A), the following commercially available products were used in Examples and Comparative Examples.
A ₁ ) Sodium salt of condensate of N-lauroyl-L-glutamic acid and L-lysine (molar ratio 2: 1) (3 amino acid residues, acyl group ratio 0.44): Perisea L-30 (Asahi Kasei Chemicals) (Made by)
A ₂ ) Isostearoyl hydrolyzed collagen, 2-amino 2-methyl 1,3-propanediol salt (5 amino acid residues, acyl group ratio 0.31): Promois EU-118D (manufactured by Seiwa Kasei Co., Ltd.) )
A ₃ ) Hydrolyzed collagen (5 amino acid residues, 0 acyl group ratio): Promois W-32 (manufactured by Seiwa Kasei Co., Ltd.)
A ₄ ) Sodium stearoyl glutamate (amino acid residue number 1, acyl group ratio 0.61): Amisoft HS-11P (Ajinomoto Co., Inc.)

The ratio of fatty acid residues having 8 to 20 carbon atoms in component (B) R ¹ and R ² (hereinafter referred to as “the ratio of fatty acid residues”) is a measure of the ester value (EV) and hydroxyl value (OHV) of the esterified product. And it computed by the method shown below.
Fatty acid residue ratio = [EV of esterified product / (EV of esterified product + OHV of esterified product)]
EV of esterified product = Saponification value of esterified product (SV)-Acid value of esterified product (AV)
OHV, SV, and AV of the esterified product were measured according to the method described in Japanese Industrial Standard (JIS).
OHV; JIS K-1557 6.4
SV: JIS K-0070 3.1
AV; JIS K-0070 4.1

Synthesis Example 1 Palmitic acid ester of polytetramethylene glycol (8.6 mol) (fatty acid residue ratio = 0.75) (Compound 1)
Reaction of 622 g of polytetramethylene glycol (n = 8.6, hydroxyl value = 180.3, raw material name; PTG650 manufactured by Hodogaya Chemical Co., Ltd.) and 385 g of palmitic acid (NAA-160 NOF Corporation) at 200 ° C. for 10 hours 958 g of polytetramethylene glycol palmitate (Table 1; Compound 1) was obtained. Since EV was 85.2 and OHV was 28.4, the ratio of fatty acid residues was 0.75.
According to Synthesis Example 1, compounds 2, 3 (polytetramethylene glycol derivative of the present invention) and compound 4 (comparative substance) shown in Table 1 were synthesized.

<Synthesis Example 2> Stearic acid ester of polyethylene glycol (22.7 mol) [Ratio of fatty acid residue = 0.99] (Compound 5)
Polyethylene glycol (n = 22.7, hydroxyl value = 112.2, raw material name: polyethylene glycol 1000 manufactured by NOF Corporation) and stearic acid (NAA-180 manufactured by NOF Corporation) 570 g were reacted at 200 ° C. for 10 hours. 1501 g of polyethylene glycol stearate was obtained. Since EV was 73.0 and OHV was 0.74, the ratio of fatty acid residues was 0.99.

<Examples 1-4 and Comparative Examples 1-14>
A hair treatment (for out bath) containing the components shown in Table 3 in a predetermined ratio and further containing the components shown in Table 2 as common addition components was prepared by the following method.

<Preparation method>
A water phase composed of water and component (A) and an oil phase composed of other components were separately dissolved at 80 ° C., respectively. After adding the oil phase to the aqueous phase, emulsification was carried out at 80 ° C. for 4 minutes using a homomixer (rotation speed 4000 rpm). Subsequently, it was quickly cooled to 40 ° C. with stirring, and then defoamed to obtain a hair treatment.
<Evaluation method>
About "smoothness of hair" A feeling of use test was conducted by 20 women. An appropriate amount of the prepared hair treatment was evenly applied to the hair, and each panelist evaluated the smoothness when naturally dried according to the following evaluation criteria in four grades, and given a score. The average of 20 panelists was evaluated as ◎ for 3.0 or more, ◯ for 2.0 or more and less than 3.0, Δ for 1.0 or more and less than 2.0, and × for less than 1.0.
4: The slipperiness of the hair surface is very good.
3: The slipperiness of the hair surface is good.
2: The slipperiness of the hair surface is slightly good.
1: The hair surface is slightly sticky or feels slightly rough.
0: The hair surface is sticky or feels rough.

A usability test was conducted by 20 women on “pumping under low humidity”. The appropriate amount of the prepared hair treatment was applied evenly to the hair, and each panelist evaluated the feel of the hair when it was spent under low humidity (25 ° C, 30% RH) for 6 hours according to the following criteria. , Gave a score.
3: The hair surface is not very dry and very moist.
2: The hair surface is almost dry and moist.
1: The hair surface is slightly pricked.
0: The hair surface is quite dry.
The average evaluation of 20 panelists was 2.0 or more, ○ was 1.0 or more and less than 2.0, and Δ was 0 or more and less than 1.0.

About the “styling property”, a usability test was conducted by 20 women. After bathing, towels and hair dryers are applied to the hair, and the appropriate amount of the prepared hair treatment is uniformly applied, and each panelist evaluates the styling properties when naturally dried to the following four criteria. Wearing.
3: There was no hair splash or unnatural spread, and the unity was very good.
2: The hair was not loose and unnaturally spread, and the unity was good.
1: The unity was a little bad.
0: There were many hairs and unnatural spread, and the unity was bad.
The average evaluation of 20 panelists was 2.0 or more, ○ was 1.0 or more and less than 2.0, and Δ was 0 or more and less than 1.0.

About "Dyeing property at the time of coloring" 5g of human black hair bundle (Bulux Co., Ltd.) was washed with 10% polyoxyethylene (3) sodium lauryl ether sulfate aqueous solution, rinsed with hot water, and then towel dried Then, the hair was dried and used as a test hair. Apply 0.5g of the prepared hair treatment evenly to the test hair, let it air dry for 1 hour, wash again with 10% polyoxyethylene (3) sodium lauryl ether sodium sulfate solution, rinse with water, towel Dry and drier dry. After repeating this operation five times, hair was dyed using a commercially available hair dye (Beauty Lab Hoyu Co., Ltd.) according to the instruction manual. Thereafter, the hair dyeability when allowed to stand overnight at room temperature was visually evaluated according to the following evaluation criteria.
○: Dyeed with no color unevenness from the hair tip to the root ×: Dyed unevenly or poorly dyed

From Examples 1 to 4, the hair cosmetic composition containing the acylated peptide compound of the present invention and the polytetramethylene glycol derivative all imparts smoothness to the hair, and is effective in improving the rusting and styling properties under low humidity. And did not suppress the dyeing effect of the hair dye.

  On the other hand, in Comparative Examples 1-9, sufficient effect is not acquired. In Comparative Example 1, since the component (A) was a peptide having no acyl group, the oil component could not be emulsified, and the hair cosmetic composition was not formed. In Comparative Example 2, the component (A) is an acylamino acid salt, and the adsorptivity to the hair surface is lowered, so that the hair is not smooth enough, and has an improvement effect on the padding and styling properties under low humidity. It was insufficient. In Comparative Example 3, since the component (A) uses a cationic surfactant that is a compound other than the acylated peptide compound of the present invention, the component (B) cannot form a uniform film on the hair surface, The improvement effect on dryness and styling under low humidity was insufficient. Further, since the silicone compound is blended, the hair surface is excellent in smoothness, but the hair dyeing property at the time of coloring is insufficient. In Comparative Example 4, since the component (A) uses a nonionic surfactant that is a compound other than the acylated peptide compound of the present invention, the component (B) cannot form a uniform film on the hair surface. In addition, the smoothness of the film was insufficient, and the effect of improving the styling property and the dryness under low humidity was also insufficient.

In Comparative Example 5, since the average added mole number n of the oxytetramethylene group of the component (B) is less than 5, the hair is not sufficiently smooth, and also has an improvement effect on dryness and styling properties under low humidity. It was not enough. In Comparative Example 6, since the component (B) has not a polyoxytetramethylene group but a polyoxyethylene group, the hair is not smooth enough and the effect of improving the dryness under low humidity is sufficient. It wasn't. In Comparative Example 7, since the alkylene glycol derivative of component (B) was not contained, the effect of improving the padding and styling properties under low humidity was not sufficient. In Comparative Example 8, since component (B) is a shea fat which is an oil agent other than the polytetramethylene alkylene glycol derivative of the present invention, the smoothness of the hair is insufficient, and the improvement effect on dryness under low humidity is also achieved. It was not enough. In Comparative Example 9, since dimethylpolysiloxane, which is an oil agent other than the polytetramethylene glycol derivative of the present invention, is blended in the component (B), the smoothness of the hair is excellent, but it is dry under low humidity. Further, the improvement effect on the styling property and the hair dyeing property at the time of coloring were insufficient.

Claims (2)

A hair cosmetic containing 0.01 to 5% by mass of the following component (A) based on the total amount and 0.2 to 20% by mass of (B) based on the total amount.
(A) N-acylated peptide compound (acyl group has 8 to 20 carbon atoms, 2 to 20 constituent amino acid residues, and the ratio of the sum of the molecular weight of the acyl group to the total molecular weight is 0.30 to 0) .56)
(B) Polytetramethylene glycol derivative R ¹ O— (CH ₂ CH ₂ CH ₂ CH ₂ O) _n —R ² (1) represented by the following general formula (1)
(R ¹ and R ² are the same or different hydrogen atoms or fatty acid residues having 8 to 20 carbon atoms, n is the average number of moles added of the oxytetramethylene group, and is 5 to 25. .)   The hair cosmetic according to claim 1, wherein component (A) is a condensate obtained by condensing N-acyl-L-glutamic acid and L-lysine at a molar ratio of 2: 1 or a salt thereof.