JP2016052998A - Hair cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hair cosmetic with excellent full-bodied feeling and spreadability when coating the cosmetic.SOLUTION: Hair cosmetic of the present invention contains the following components (A) to (D): (A) 0.5 to 3 mass% of cationic surfactant; (B) 1.5 to 15 mass% of linear alcohol with carbon number of 12 or more and 22 or less; (C) polyoxypropylene alkyl ether RO-(PO)-H (I) expressed by the general formula (I) (in the general formula (I), R denotes alkyl group with carbon number of 3 to 8, PO denotes propyleneoxy group, n denotes an average addition molar number of PO, and n=2.5 to 15, and an octanol-water distribution coefficient (logP value) is 1 or more and 4 or less); and (D) water, in which a weight ratio ((C)/{(A)+(B)}) of the component (C) with respect to the total weight of the component (A) and the component (B) is 0.003 or more and 0.8 or less, and a mixture of the components (A) to (D) forms a lamellar structure at 25°C.SELECTED DRAWING: None

Description

  The present invention relates to a hair cosmetic.

  Various hair cosmetics such as rinses, conditioners, and treatments are used to impart smoothness to hair and improve touch. Conventionally, hair cosmetics in which a cationic surfactant and an oil such as a higher alcohol are blended and emulsified are known.

  For example, Patent Document 1 contains a quaternary ammonium salt and a higher alcohol, and by specifying the content of a specific quaternary ammonium salt and a higher alcohol, the slip as a slick during application lasts until rinsing. Cosmetics are listed. Patent Document 2 discloses a polyoxyethylene polyoxypropylene alkyl ether having a relatively short chain alkyl group and having a small number of polyoxyethylenes and polyoxypropylenes in a certain range; a surfactant; Hair cosmetics exhibiting effects such as being excellent in oiliness due to hand transfer when finished (low stickiness) are described.

  In recent years, hair that has undergone chemical damage such as hair colors and permanents, UV damage, heat damage such as hair dryers, etc. has been on the rise, and expectations for hair cosmetics are increasing. In particular, there has been a demand for an improvement in the feeling of use when hair cosmetics are applied to the hair and acclimated. Further, simply increasing the oil content to increase the viscosity of the hair cosmetic tends to make it difficult to extend the hair cosmetic during application.

JP 2002-29937 A JP 2010-168342 A

  The present invention relates to a hair cosmetic that is excellent in richness and ease of extension during application.

The present invention includes the following components (A) to (D);
(A) Cationic surfactant 0.5-3 mass%
(B) Straight chain alcohol having 12 to 22 carbon atoms 1.5 to 15% by mass
(C) Polyoxypropylene alkyl ether represented by the general formula (I) RO- (PO) _n -H (I)
(In the general formula (I), R represents an alkyl group having 3 to 8 carbon atoms, PO represents a propyleneoxy group, n represents the average number of moles added of PO, n = 2.5 to 15, and octanol-water partition. (The coefficient (log P value) is 1 or more and 4 or less.)
(D) contains water,
The weight ratio of component (C) to the total weight of component (A) and component (B) ((C) / {(A) + (B)}) is 0.003 or more and 0.8 or less,
Provided is a hair cosmetic in which a mixture of components (A) to (D) forms a lamellar structure at 25 ° C.

  ADVANTAGE OF THE INVENTION According to this invention, the hair cosmetics excellent in the rich feeling at the time of application | coating and the ease of extending | stretching can be obtained.

  Hereinafter, embodiments of the present invention will be described.

In the hair cosmetic composition of the present invention, the mixture of components (A) to (D) has a lamellar structure at 25 ° C. Since the lamellar structure of the present invention can be swollen with water, even when diluted with water during use of the hair cosmetic, it can suppress a decrease in the viscosity of the hair cosmetic, impart elasticity, and stretch and stretch when applied. It is thought that ease can be given.
The lamellar structure can be observed using a polarizing microscope, a small angle X-ray scattering, or a differential interference microscope.

  Examples of the cationic surfactant of component (A) include (i) alkyltrimethylammonium salt, (ii) alkoxyalkyltrimethylammonium salt, (iii) dialkyldimethylammonium salt, (iv) alkyldimethylamine and its salt, v) alkoxydimethylamine and a salt thereof, (vi) alkylamidodimethylamine and a salt thereof, and the like. A component (A) may use 1 type (s) or 2 or more types.

(I) Alkyltrimethylammonium salt Examples of the alkyltrimethylammonium salt include those represented by the following general formula (1).
R ¹ —N ⁺ (CH ₃ ) ₃ X ⁻ (1)
[Wherein, R ¹ represents an alkyl group having 12 to 22 carbon atoms, and X ⁻ represents a halide ion such as a chloride ion or a bromide ion. ]
Specific examples include cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, and behenyltrimethylammonium chloride.

(Ii) Alkoxyalkyltrimethylammonium salt Examples of the alkoxyalkyltrimethylammonium salt include those represented by the following general formula (2).
R ² —O—R ³ —N ⁺ (CH ₃ ) ₃ X ⁻ (2)
[Wherein R ² represents an alkyl group having 12 to 22 carbon atoms, R ³ represents an ethylene group or a propylene group optionally substituted by a hydroxy group, and X ⁻ is the same as above. ]
Specific examples include stearoxypropyltrimethylammonium chloride, stearoxyethyltrimethylammonium chloride, stearoxyhydroxypropyltrimethylammonium chloride, and the like.

(Iii) Dialkyldimethylammonium salt Examples of the dialkyldimethylammonium salt include those represented by the following general formula (3).
(R ⁴ ) ₂ N ⁺ (CH ₃ ) ₂ X ⁻ (3)
Wherein, R ⁴ each independently represents an alkyl group or a benzyl group having 12 to 22 carbon atoms, X ^- are as defined above. ]
Specifically, distearyl dimethyl ammonium chloride etc. are mentioned.

(Iv) Alkyldimethylamine and its salt Alkyldimethylamine reacts with an acid to form a quaternary ammonium salt, which becomes a surfactant. Therefore, alkyldimethylamine and its salt are defined herein as cationic surfactants. Moreover, the content is converted by the mass of alkyldimethylamine. Examples of alkyldimethylamine and salts thereof include those represented by the following general formula (4) and salts thereof.
R ⁵ —N (CH ₃ ) ₂ (4)
[Wherein, R ⁵ represents an alkyl group having 12 to 22 carbon atoms. ]

Examples of the salt of alkyldimethylamine include salts with organic acids or inorganic acids. Examples of the organic acid include monocarboxylic acids such as acetic acid and propionic acid; dicarboxylic acids such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, and phthalic acid; polycarboxylic acids such as polyglutamic acid; Examples thereof include hydroxycarboxylic acids such as glycolic acid, lactic acid, hydroxyacrylic acid, glyceric acid, malic acid, tartaric acid and citric acid; acidic amino acids such as glutamic acid and aspartic acid. Examples of the inorganic acid include hydrochloric acid, sulfuric acid, phosphoric acid and the like. Among these, organic acids are preferable, dicarboxylic acids, hydroxycarboxylic acids, and acidic amino acids are preferable. As the dicarboxylic acids, maleic acid and succinic acid are more preferable. As the hydroxycarboxylic acid, glycolic acid, lactic acid, and malic acid are more preferable. As the acidic amino acid, glutamic acid is more preferable.
Specific examples of alkyldimethylamine and salts thereof include N, N-dimethylbehenylamine, N, N-dimethylstearylamine and organic acid salts thereof. N, N-dimethylbehenylamine lactate, N, N N-dimethylstearylamine glycolate and the like are preferred.

(V) Alkoxydimethylamine and its salt Alkoxydimethylamine reacts with an acid to form a quaternary ammonium salt, which becomes a surfactant. Therefore, alkyldimethylamine and its salt are defined herein as cationic surfactants. Moreover, the content is converted by the mass of alkoxydimethylamine. Examples of alkoxydimethylamine and salts thereof include those represented by the following general formula (5) and salts thereof.
_{^{R 6 -O-R 7 -N (}} CH 3) 2 (5)
[Wherein R ⁶ represents an alkyl group having 12 to 22 carbon atoms, and R ⁷ represents an ethylene group or a propylene group. ]

Examples of the salt of alkoxydimethylamine include salts with organic acids or inorganic acids. Examples of the organic acid include monocarboxylic acids such as acetic acid and propionic acid; dicarboxylic acids such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, and phthalic acid; polycarboxylic acids such as polyglutamic acid; Examples thereof include hydroxycarboxylic acids such as glycolic acid, lactic acid, hydroxyacrylic acid, glyceric acid, malic acid, tartaric acid and citric acid; acidic amino acids such as glutamic acid and aspartic acid. Examples of the inorganic acid include hydrochloric acid, sulfuric acid, phosphoric acid and the like. Among these, organic acids are preferable, dicarboxylic acids, hydroxycarboxylic acids, and acidic amino acids are preferable. As the dicarboxylic acids, maleic acid and succinic acid are more preferable. As the hydroxycarboxylic acid, glycolic acid, lactic acid, and malic acid are more preferable. As the acidic amino acid, glutamic acid is more preferable.
Specific examples of alkoxydimethylamine and salts thereof include N, N-dimethyl-3-hexadecyloxypropylamine, N, N-dimethyl-3-octadecyloxypropylamine and organic acid salts thereof. N-dimethyl-3-hexadecyloxypropylamine lactate and N, N-dimethyl-3-octadecyloxypropylamine glycolate are preferred.

(Vi) Alkylamidodimethylamine and its salt Alkylamidodimethylamine reacts with an acid to form a quaternary ammonium salt to become a surfactant. Therefore, alkyldimethylamine and its salt are defined herein as cationic surfactants. Further, the content is converted by the mass of alkylamidodimethylamine. Examples of the alkylamidodimethylamine and salts thereof include those represented by the following general formula (6) and salts thereof.
^{R 8 -C (= O) NH} -R 9 -N (CH 3) 2 (6)
[Wherein R ⁸ represents an alkyl group having 11 to 21 carbon atoms, and R ⁹ represents an ethylene group or a propylene group. ]

Examples of the salt of alkylamidodimethylamine include salts with organic acids or inorganic acids. Examples of the organic acid include monocarboxylic acids such as acetic acid and propionic acid; dicarboxylic acids such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, and phthalic acid; polycarboxylic acids such as polyglutamic acid; Examples thereof include hydroxycarboxylic acids such as glycolic acid, lactic acid, hydroxyacrylic acid, glyceric acid, malic acid, tartaric acid and citric acid; acidic amino acids such as glutamic acid and aspartic acid. Examples of the inorganic acid include hydrochloric acid, sulfuric acid, phosphoric acid and the like. Among these, organic acids are preferable, dicarboxylic acids, hydroxycarboxylic acids, and acidic amino acids are preferable. As the dicarboxylic acids, maleic acid and succinic acid are more preferable. As the hydroxycarboxylic acid, glycolic acid, lactic acid, and malic acid are more preferable. As the acidic amino acid, glutamic acid is more preferable.
Specific alkylamidodimethylamines and salts thereof include N- [3- (dimethylamino) propyl] docosanamide, N- [3- (dimethylamino) propyl] stearamide, and organic acid salts thereof. [3- (Dimethylamino) propyl] docosanamide lactate and N- [3- (dimethylamino) propyl] stearamide glycolate are preferred.

  Component (A) is preferably (v) alkoxydimethylamine and a salt thereof or (vi) alkylamidodimethylamine and a salt thereof from the viewpoint of the conditioning effect. Among them, (v) alkoxydimethylamine and its salt are preferable, and specifically, N, N-dimethyl-3-hexadecyloxypropylamine, N, N-dimethyl-3-octadecyloxypropylamine (stearoxypropyl) Dimethylamine) or a mixture thereof is more preferable, and N, N-dimethyl-3-octadecyloxypropylamine (stearoxypropyldimethylamine) is more preferable.

  Content of a component (A) is 0.5 mass% or more with respect to the whole hair cosmetics from a viewpoint which provides moderate viscosity and the ease of extending, and 1 mass% or more is preferable. On the other hand, the content of the component (A) is 3% by mass or less, preferably 2% by mass or less, and preferably 1.5% by mass with respect to the whole hair cosmetic from the viewpoint of imparting an appropriate viscosity and good usability. % Or less is more preferable. Moreover, 1 mass% or more and 2 mass% or less are preferable, and the range of 1 mass% or more and 1.5 mass% or less is more preferable.

  The component (B) is a linear alcohol having 12 to 22 carbon atoms, and one or two or more types may be used. Component (B) is preferably a linear alcohol having 16 to 22 carbon atoms, more preferably 18 carbon atoms. Specific examples include cetyl alcohol (16 carbon atoms), stearyl alcohol (18 carbon atoms), aralkyl alcohol (20 carbon atoms), behenyl alcohol (22 carbon atoms), and stearyl alcohol is preferred.

  Content of a component (B) is 1.5 mass% or more with respect to the whole hair cosmetics from a viewpoint which provides the favorable usability in hair, 2 mass% or more is preferable, and 4 mass% or more is more. preferable. On the other hand, content of a component (B) is 15 mass% or less with respect to the whole hair cosmetics from a viewpoint of obtaining moderate viscosity, 10 mass% or less is preferable and 6 mass% or less is more preferable. Moreover, 2 mass% or more and 10 mass% or less are preferable, and the range of 4 mass% or more and 6 mass% or less is more preferable.

  The weight ratio of the component (B) to the weight of the component (A) ((B) / (A)) is preferably 3 or more and 5 or less. Thereby, a lamella structure can be formed and it can be excellent in the richness at the time of application | coating and the ease of extending | stretching. From the viewpoint of improving the balance between richness and ease of stretching, the weight ratio ((B) / (A)) is preferably 3.5 or more, and more preferably 4 or less.

Component (C) is a polyoxypropylene alkyl ether represented by the general formula (I).
RO- (PO) _n -H (I)
(In general formula (I), R represents an alkyl group having 3 to 8 carbon atoms, PO represents a propyleneoxy group, n represents the average number of moles of PO added, and n = 2.5 to 15.)

  The octanol-water partition coefficient (log P value) of component (C) is 1 or more and 4 or less. Thereby, the balance of the rich feeling at the time of application | coating and the ease of extending can be made favorable. Further, the log P value of the component (C) is preferably 1.3 or more and 4 or less from the viewpoint of imparting further easiness of extension, and 2 or more and 4 or less from the viewpoint of improving the balance between richness and easiness of extension. More preferably, 3 or more and 4 or less are more preferable.

  Here, the “log P value” is a logarithmic value of the 1-octanol / water partition coefficient of the compound, and in the partition equilibrium when the compound is dissolved as a solute in the two-liquid solvent system of 1-octanol and water. , Means the ratio of the equilibrium concentration of the solute in each solvent and is generally indicated in the form of log “log P” with respect to the base 10. That is, the log P value is an index of lipophilicity (hydrophobicity). The larger the value, the more hydrophobic, and the smaller the value, the more hydrophilic.

  In this case, for the logP value, KOWWIN (tm): Estimates the log octanol-water partition coefficient, log KOW, of chemicals usage an atom / fragment control. (Perspectives in Drug Discovery and Design, 19: 67-84, 2000), using numerical values calculated by the fragment approach.

  The content of the component (C) is preferably 0.01% by mass or more based on the total amount of the hair cosmetic from the viewpoint of imparting a rich feeling and ease of stretching to the hair cosmetic forming a lamellar structure. 0.03 mass% or more is more preferable. On the other hand, 10 mass% or less is preferable with respect to the whole hair cosmetic, and 5 mass% or less is more preferable from a viewpoint of obtaining moderate viscosity and a favorable usability by the hair cosmetic which forms a lamella structure. Moreover, 0.01 mass% or more and 10 mass% or less are preferable, and the range of 0.03 mass% or more and 5 mass% or less is more preferable.

  The weight ratio of component (C) to the total weight of component (A) and component (B) ((C) / {(A) + (B)}) is 0.003 or more and 0.8 or less. Thereby, a favorable lamella structure can be formed, and it can be excellent in the richness at the time of application | coating and the ease of extension. From the viewpoint of further improving the balance between richness and ease of stretching, the weight ratio ((C) / {(A) + (B)}) is preferably 0.006 or more, while 0.05 or less is preferable. 0.02 or less is more preferable. The weight ratio ((C) / {(A) + (B)}) is preferably 0.003 or more and 0.05 or less, and more preferably 0.006 or more and 0.02 or less.

  As the water of component (D), ion-exchanged water, distilled water, or the like can be used. 50 mass% or more is preferable with respect to the whole hair cosmetics, and, as for content of a component (D), 60 mass% or more is more preferable. Moreover, less than 98 mass% is preferable, and 95 mass% or less is more preferable.

  The hair cosmetic composition according to the present invention may further contain (E) polypropylene glycol. The content of the component (E) is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, based on the whole hair cosmetic, from the viewpoint of imparting a rich feeling to the user at the time of application. 5 mass% or less is preferable, 3 mass% or less is more preferable, and 2 mass% or less is further more preferable. Moreover, 0.01 mass% or more and 5 mass% or less are preferable, the range of 0.05 mass% or more and 3 mass% or less is more preferable, and the range of 0.05 mass% or more and 2 mass% or less is further more preferable.

  The hair cosmetic obtained by the present invention preferably has a pH of 1 to 5.5 at 25 ° C. when diluted 20 times by weight with water. Within this range, a good emulsion can be obtained, and a rich feeling and ease of stretching can be imparted during coating. By adjusting the pH, part or all of component (A) is used in the form of a salt. As for pH, 2-6 are more preferable, and 2.5-5 are still more preferable from a viewpoint which provides richness. For adjusting the pH, an organic acid having 1 to 10 carbon atoms, an inorganic acid, a basic substance such as sodium hydroxide, or the like, which is usually used as a pH adjusting agent may be used.

In the hair cosmetic composition according to the present invention, the viscosity at a shear rate (500 s ⁻¹ ) at 30 ° C. when diluted 2 times by weight with water is preferably 0.050 to 0.270 (Pa · s). As a result, richness and ease of extension can be obtained.
As the viscometer, for example, a rheometer (Anton Paar, Physica MCR301) can be used.

  Generally, users of hair cosmetics use hair cosmetics such as rinses for wet hair after shampooing. Therefore, at the time of application, the hair cosmetic is supplied with moisture from the hair and is stretched by hand over the entire hair while being diluted with water. At this time, the liquid image of the hair cosmetic that the user feels with his hand leads to one image of the performance of the hair cosmetic. Here, in the case of general hair cosmetics, when moisture is supplied, the viscosity is simply greatly reduced, and an image of the performance of hair cosmetics such as a feeling of absorption is obtained. However, it was found that the hair cosmetic composition of the present invention imparts an image such as a feeling of nutrition or richness when applied to the hair and spread.

The hair cosmetic composition of the present invention contains the specific components (A) to (C) in a specific ratio and has a lamellar structure at 25 ° C., so that it can be excellent in richness and ease of extension at the time of application. . Although the details of this reason are not clear, it is considered as follows.
In general, hair cosmetics such as rinses are thickened by forming a bilayer film composed of a cationic surfactant and a higher alcohol, which forms a lamellar structure throughout the hair cosmetic. It is considered. However, such conventional hair cosmetics are liable to be reduced in viscosity due to expansion and destruction of the bimolecular film due to dilution with water.
On the other hand, the hair cosmetic composition of the present invention combines the components (A) and (B) with the component (C) at a specific ratio so that the propyleneoxy group in the component (C) is hydrophilic and hydrophobic. It is considered that the structure of the bilayer formed by the components (A) and (B) and the lamellar structure in which the bilayers are stacked in layers are reinforced by combining both properties. As a result, even if the lamella structure swells with water, the structure is maintained. Therefore, even when diluted with water during use of the hair cosmetic, a decrease in the viscosity of the hair cosmetic is suppressed, and elasticity (normal stress) is maintained. It is thought that it is obtained. Thus, the hair cosmetic composition of the present invention does not increase the viscosity of the hair cosmetic composition itself, but intends to maintain the viscosity before dilution with respect to dilution with water. Therefore, in addition to the effect of being “easy to stretch” over the entire hair, the inclusion of the specific component (C) can provide a “bright feeling” as a result of obtaining a sense of thickness and nutrition.

  Moreover, it is preferable that the hair cosmetics by this invention show normal stress. Normal stress is a repulsive force felt by fingers when hair cosmetic is applied to hair, and is considered to be a cause of a rich feeling. The normal stress is affected by various factors such as the viscosity of the hair cosmetic and the amount of water.

The normal stress can be measured as follows, for example.
The same amount of water is added to the hair cosmetic to dilute it 2 times to prepare a 2-fold diluted solution. Using the obtained 2-fold diluted solution, expression of a positive normal stress with respect to the shear rate (1000 s ⁻¹ ) can be confirmed by a rheometer (Anton Paar, Physica MCR301).

  The hair cosmetic composition according to the present invention includes other cationic surfactants, nonionic surfactants, amphoteric surfactants and the like; highly polymerized dimethylpolysiloxane, methylpolysiloxane, amino-modified silicone, and polyether-modified silicone. , Silicone compounds such as methylphenylpolysiloxane, fatty acid-modified silicone, alcohol-modified silicone, alkoxy-modified silicone, epoxy-modified silicone, fluorine-modified silicone, cyclic silicone and alkyl-modified silicone: vegetable oils such as sunflower oil and castor oil, hydrogenation thereof Products and mixtures, hydrocarbon oils such as liquid paraffin, squalane and squalene, higher fatty acids such as oleic acid and stearic acid and esters thereof, (hydroxystearic acid / stearic acid / rosinic acid) dipentaerythrityl Oily components such as organic acid esters of polyhydric alcohol condensates; cationic polymers such as cationized cellulose and cationized guar gums; other pearlizing agents, dyes, fragrances, propellants, chelating agents, pH adjusters, antiseptics An agent, a refreshing agent, an antidandruff agent, an antioxidant and the like can be appropriately blended within a range not impairing the object of the present invention.

  Nonionic surfactants include polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene sorbite fatty acid esters, polyoxyalkylene glycerin fatty acid esters, polyoxyalkylene fatty acid esters, glyceryl ether, and polyoxy excluding component (C). Alkylene alkyl ethers, polyoxyalkylene alkyl phenyl ethers, polyoxyalkylene (cured) castor oils, sucrose fatty acid esters, polyglycerin alkyl ethers, polyglycerin fatty acid esters, fatty acid alkanolamides, alkyl glycosides, etc. Can be mentioned. Of these, alkylglycosides, polyoxyalkylene (carbon number 8 to 20) fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene hydrogenated castor oil, and fatty acid alkanolamides are preferred. For example, oleic acid diethanolamide, palm kernel oil fatty acid diethanolamide, coconut oil fatty acid diethanolamide, lauric acid diethanolamide, polyoxyethylene coconut oil fatty acid monoethanolamide, coconut oil fatty acid monoethanolamide, lauric acid isopropanolamide, lauric acid monoethanol Ethanolamide is mentioned.

  Examples of amphoteric surfactants include betaine surfactants such as alkyldimethylaminoacetic acid betaines and fatty acid amidopropyl betaines. Specifically, lauric acid amidopropyl betaine, palm kernel oil fatty acid amidopropyl betaine, and coconut oil fatty acid amidopropyl betaine can be used.

Next, the manufacturing method of hair cosmetics is demonstrated.
The method for producing a hair cosmetic according to the present invention comprises the following components (A) to (C):
(A) Cationic surfactant (B) Linear alcohol having 12 to 22 carbon atoms (C) Polyoxypropylene alkyl ether represented by the following general formula (I) RO- (PO) _n -H (I)
(In the general formula (I), R represents an alkyl group having 3 to 8 carbon atoms, PO represents a propyleneoxy group, n represents the average number of moles added of PO, n = 2.5 to 15, and octanol-water partition. An oil phase containing a coefficient (log P value) of 1 or more and 4 or less,
A step of uniformly mixing the oil phase with an aqueous phase to obtain an emulsion;
Cooling the emulsion to room temperature,
In the step of obtaining the emulsion, the emulsion is uniformly mixed while heating at a temperature lower than the phase transition temperature of the emulsion and not lower than the melting point of the oil phase.

  Here, the phase transition temperature of the emulsion and the melting point of the oil phase can be measured using differential scanning calorimetry (DSC) or the like. A hair cosmetic having a good lamellar structure is obtained by heating at a temperature lower than the phase transition temperature of the emulsion and not lower than the melting point of the oil phase containing the components (A) to (C). As a means for uniformly mixing and emulsifying, a general mixing and stirring device is used.

  The hair cosmetic composition according to the present invention can be used for hair lining, hair conditioner, hair treatment, hair pack, hair cream, conditioning mousse, hair mousse, shampoo, leave-on treatment and the like.

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.
The present invention further discloses the following composition, production method or use.

<1>
The following components (A) to (D);
(A) Cationic surfactant 0.5-3 mass%
(B) Straight chain alcohol having 12 to 22 carbon atoms 1.5 to 15% by mass
(C) Polyoxypropylene alkyl ether represented by the general formula (I) RO- (PO) _n -H (I)
(In the general formula (I), R represents an alkyl group having 3 to 8 carbon atoms, PO represents a propyleneoxy group, n represents the average number of moles added of PO, n = 2.5 to 15, and octanol-water partition. (The coefficient (log P value) is 1 or more and 4 or less.)
(D) contains water,
The weight ratio of component (C) to the total weight of component (A) and component (B) ((C) / {(A) + (B)}) is 0.003 or more and 0.8 or less,
A hair cosmetic in which a mixture of components (A) to (D) forms a lamellar structure at 25 ° C.

<2>
(E) Polypropylene glycol is preferably contained in an amount of 0.01 to 5% by mass, more preferably 0.05% by mass or more and 3% by mass or less, and 0.05% by mass with respect to the entire hair cosmetic. The range of 2% by mass or less is more preferable, 0.01% by mass or more is preferable, 0.05% by mass or more is more preferable, while 5% by mass or less is preferable, and 3% by mass or less is more preferable. The hair cosmetic according to <1>, wherein the following is more preferable.
<3>
The weight ratio of component (B) to the weight of component (A) ((B) / (A)) is 3 or more and 5 or less, preferably 3.5 or more, while 4 or less is preferable, <1> or Hair cosmetics as described in <2>.
<4>
Component (A) is preferably (i) an alkyltrimethylammonium salt, (ii) an alkoxyalkyltrimethylammonium salt, (iii) a dialkyldimethylammonium salt, (iv) an alkyldimethylamine and its salt, (v) an alkoxydimethylamine And (vi) at least one selected from alkylamidodimethylamine and salts thereof, more preferably (v) alkoxydimethylamine and salts thereof, or (vi) alkylamidodimethylamine and salts thereof And more preferably (v) alkoxydimethylamine and salts thereof, and even more preferably N, N-dimethyl-3-hexadecyloxypropylamine, N, N-dimethyl-3-octadecyloxypropylamine ( Stearoxypropyldi Ethylamine), or mixtures thereof, <1> to <3> The hair cosmetic composition according to any one.
<5>
The content of the component (A) is preferably 1% by mass or more, preferably 2% by mass or less, more preferably 1.5% by mass or less, and more preferably 1% by mass to 2% by mass with respect to the entire hair cosmetic composition. % Or less, and more preferably in the range of 1% by mass to 1.5% by mass, in any one of <1> to <4>.
<6>
Component (B) is preferably a straight chain alcohol having 16 to 22 carbon atoms, more preferably 18 carbon atoms, and more preferably cetyl alcohol (16 carbon atoms), stearyl alcohol (18 carbon atoms), aralkyl. Alcohol (carbon number 20), behenyl alcohol (carbon number 22), etc. are mentioned, Hair cosmetics in any one of <1> thru | or <5> which is at least one chosen from stearyl alcohol.
<7>
The content of the component (B) is preferably 2% by mass or more, more preferably 4% by mass or more, preferably 10% by mass or less, more preferably 6% by mass or less, based on the whole hair cosmetic. The hair cosmetic according to any one of <1> to <6>, preferably 2% by mass to 10% by mass, and more preferably 4% by mass to 6% by mass.
<8>
The octanol-water partition coefficient (log P value) of the component (C) is preferably from 1.3 to 4, more preferably from 2 to 4, more preferably from 3 to 4, any one of <1> to <7> Hair cosmetics described in 1.
<9>
The content of the component (C) is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, more preferably 10% by mass or less, and more preferably 5% by mass or less with respect to the entire hair cosmetic. The hair cosmetic according to any one of <1> to <8>, preferably 0.01% by mass or more and 10% by mass or less, and more preferably 0.03% by mass or more and 5% by mass or less.
<10>
The weight ratio of component (C) to the total weight of component (A) and component (B) ((C) / {(A) + (B)}) is preferably 0.006 or more, while 0.05 The hair cosmetic according to any one of <1> to <9>, wherein the following is preferable, and 0.02 or less is more preferable.
<11>
The content of the component (D) is preferably 50% by mass or more, more preferably 60% by mass or more, more preferably less than 98% by mass, and more preferably 95% by mass or less, based on the total amount of the hair cosmetic composition. > To <10> The hair cosmetic composition according to any one of the above.
<12>
The pH at 25 ° C. when the hair cosmetic is diluted 20 times by weight with water is preferably 1 to 5.5, more preferably 2 to 6, and from the viewpoint of imparting a rich feeling, 2.5. ~ 5 is more preferable, Hair cosmetics in any one of <1> thru | or <11>.
<13>
The viscosity at the shear rate (500 s ⁻¹ ) at 30 ° C. when the hair cosmetic is diluted 2 times by weight with water is preferably 0.050 to 0.270 (Pa · s), <1 > To <12> The hair cosmetic composition according to any one of the above.
<14>
<1> thru | or <13> The usage method of hair cosmetics which apply | coats the hair cosmetics in any one to wet hair.
<15>
The following components (A) to (C);
(A) Cationic surfactant (B) Linear alcohol having 12 to 22 carbon atoms (C) Polyoxypropylene alkyl ether represented by the following general formula (I) RO- (PO) _n -H (I)
(In the general formula (I), R represents an alkyl group having 3 to 8 carbon atoms, PO represents a propyleneoxy group, n represents the average number of moles added of PO, n = 2.5 to 15, and octanol-water partition. An oil phase containing a coefficient (log P value) of 1 or more and 4 or less,
A step of uniformly mixing the oil phase with an aqueous phase to obtain an emulsion;
Cooling the emulsion to room temperature,
The step of obtaining the emulsion is a method for producing a hair cosmetic, wherein the mixture is uniformly mixed while heating at a temperature below the phase transition temperature of the emulsion and above the melting point of the oil phase.

  In the following examples, all the percentages are mass%.

<Manufacture of hair cosmetics>
Hair cosmetics having the compositions shown in Table 1 were produced by the following procedure.
(1) An organic acid was added to component (D) heated to 55 ° C. (Water phase)
(2) Components (A), (B), and (C) (optionally component (E)) were mixed and dissolved at 80 ° C. (Oil phase)
(3) While stirring the aqueous phase with a propeller (about 200 r / min in the production of about 500 ml), the oil phase was added to the aqueous phase and heated and mixed for about 20 minutes to emulsify (the emulsification temperature is shown in Table 1). ).
(4) It cooled to 30 degreeC and obtained hair cosmetics.

<Phase transition temperature of emulsion, melting point of oil phase>
The obtained emulsion and oil phase were measured with a differential scanning calorimeter (SEIKO, SSC5200 series, DSC120, heating rate 2 ° C./min).
The results are shown in Table 1.

<Log P value>
logP value, KOWWIN (tm): Estimates the log octanol-water partition coefficient, log KOW, of chemicals using an atom / fragment contribution meth. (Perspectives in Drug Discovery and Design, 19: 67-84, 2000) was used for the numerical values calculated by the fragment approach.

<Observation of lamellar structure>
The hair cosmetic was observed for the presence or absence of a lamellar structure at 25 ° C. using a polarizing microscope. The results are shown in Table 1.

<Evaluation>
(sensory evaluation)
Japanese female hair 20 g (about 15 to 20 cm) was bundled and washed with a standard shampoo. To this hair bundle, 2 g of the obtained hair cosmetic was uniformly applied and evaluated. Each evaluation item of “Thickness at application and rich feeling” and “Ease of extension at application” was evaluated according to the following criteria, and the total score of three professional panelists was used as a rating.
・ Standard shampoo formulation (pH 7.0)
25% polyoxyethylene (2.5) lauryl ether sulfate sodium salt 62.0%
Lauric acid diethanolamide 2.3%
Edetate disodium 0.15%
Sodium benzoate 0.5%
Sodium chloride 0.8%
75% phosphoric acid appropriate amount Fragrance, methylparaben appropriate amount Purified water Remaining amount / Evaluation criteria 5: Good 4: Slightly good 3: Neither 2: Slightly bad 1: Bad

(Evaluation of the physical properties)
-Viscosity The same weight of water was added to the hair cosmetic to dilute it twice, and the mixture was stirred at 100 rpm for 10 minutes to prepare a 2-fold diluted solution. About the obtained 2 times dilution liquid, the viscosity with respect to the shear rate (500 s < ^-1 >) in 30 degreeC was measured using the rheometer (Anton Paar, Physica MCR301) (Pa * s). The jig was a cone plate (Anton Paar CP50-1 / S) having a diameter of 50 mm and sandblasted, measured in the range of a shear rate of 0.001 s ^{−1 to} 1000 s ⁻¹ , and the viscosity at 500 s ⁻¹ was read. .

-Normal stress About the 2 times dilution liquid obtained by making it above, about Example 2,3,10 in which richness was felt, Shear at 30 degreeC using a rheometer (Anton Paar, Physica MCR301) the normal stress measured in the range of speed ^{0.001s -1 ~1000s} -1, for the shear rate (1000s ^-1), the normal stress or take a positive value, was confirmed or not. In the case of taking a positive value, it was marked as ◯, and in other cases, it was marked as x. The jig used was a cone plate (Anton Paar CP50-1 / S) having a diameter of 50 mm and sandblasted.

<Examples and comparative examples>
Hair cosmetics having the compositions shown in Table 1 were prepared and evaluated as described above. The results are shown in Table 1.
Table 2 shows the results of measuring normal stress.

In Table 1, each component is as follows.
Stearoxypropyldimethylamine (Farmin DME-80, Kao Corporation)
Stearyl alcohol (Calcoal 8098, Kao Corporation)
Polyoxypropylene (3) octyl ether (logP = 3.24) (Sofcare GP-1, Kao Corporation) The numbers in parentheses indicate the average number of moles of PO groups added (hereinafter the same).
Polyoxypropylene (7) propyl ether (log P = 1.35) (synthetic product)
Polyoxypropylene (10) butyl ether (log P = 2.27) (synthetic product)
Polyoxypropylene (6) octyl ether (log P = 3.66) (synthetic product)
Polyoxypropylene (10) lauryl ether (log P = 6.20) (synthetic product)
Polyoxypropylene (3) propyl ether (log P = 0.78) (synthetic product)
Polypropylene glycol (PPG-7) (ADEKA CARPOL DL-30, ADEKA CORPORATION
DL-lactic acid (Musashino Lactic Acid 90, Musashino Chemical Co., Ltd.)

Claims (4)

The following components (A) to (D);
(A) Cationic surfactant 0.5-3 mass%
(B) Straight chain alcohol having 12 to 22 carbon atoms 1.5 to 15% by mass
(C) Polyoxypropylene alkyl ether represented by the general formula (I) RO- (PO) _n -H (I)
(In the general formula (I), R represents an alkyl group having 3 to 8 carbon atoms, PO represents a propyleneoxy group, n represents the average number of moles added of PO, n = 2.5 to 15, and octanol-water partition. (The coefficient (log P value) is 1 or more and 4 or less.)
(D) contains water,
The weight ratio of component (C) to the total weight of component (A) and component (B) ((C) / {(A) + (B)}) is 0.003 or more and 0.8 or less,
A hair cosmetic in which a mixture of components (A) to (D) forms a lamellar structure at 25 ° C.   The hair cosmetic according to claim 1, wherein (E) polypropylene glycol is contained in an amount of 0.01 to 5% by mass relative to the entire hair cosmetic.   The hair cosmetic composition according to claim 1 or 2, wherein a weight ratio of the component (B) to the weight of the component (A) ((B) / (A)) is 3 or more and 5 or less. The following components (A) to (C);
(A) Cationic surfactant (B) Linear alcohol having 12 to 22 carbon atoms (C) Polyoxypropylene alkyl ether represented by the following general formula (I) RO- (PO) _n -H (I)
(In the general formula (I), R represents an alkyl group having 3 to 8 carbon atoms, PO represents a propyleneoxy group, n represents the average number of moles added of PO, n = 2.5 to 15, and octanol-water partition. An oil phase containing a coefficient (log P value) of 1 or more and 4 or less,
A step of uniformly mixing the oil phase with an aqueous phase to obtain an emulsion;
Cooling the emulsion to room temperature,
The step of obtaining the emulsion is a method for producing a hair cosmetic, wherein the mixture is uniformly mixed while heating at a temperature below the phase transition temperature of the emulsion and above the melting point of the oil phase.