JP2021063015A - Hair washing composition - Google Patents

Abstract

To provide a hair washing composition that is excellent in foaming and foam resilience and forms soft foam having a good washing feel.SOLUTION: A hair washing composition contains (A): a copolymer of a monomer (a) of the following formula with another monomer, of 0.01-3 mass%, (B): an anionic surfactant of 1-20 mass%, (C): an ampholytic surfactant of 1-20 mass%, (D): a cationic polymer excluding (A) of 0.05-3 mass%, and (E): water.SELECTED DRAWING: None

Description

The present invention relates to a hair cleansing composition.

With regard to hair cleansing composition such as shampoo, many techniques have been disclosed so far for the purpose of washing away dirt adhering to hair and scalp and preparing a comfortable hair and scalp environment. Among them, not only excellent detergency, but also selective detergency that rinses away dirt but not active ingredients, and good finger passage when rinsing hair.

In addition, as one of the solutions to the problem that the hairs are entangled with each other when washing the hair and the finger directly hits the hair, which causes damage to the hair and causes split ends and split ends, foaming and foaming during the washing of the hair Improve quality. Specifically, good foaming produces enough foam to suppress entanglement between hairs, and high foam elasticity (stiffness) causes the foam to disappear during hair washing, resulting in reduced cushioning. Prevents entanglement between hairs and direct finger contact with hair.

Many techniques focusing on such foaming and foam elasticity have been disclosed so far.
Among them, focusing on the elasticity of bubbles, a method of adding a polymer component such as a cationized polymer is known. Patent Document 1 discloses a composition containing an α-olefin sulfonate, a coconut oil fatty acid methyl taurine salt, an amphoteric tenside, two or more water-soluble polymers having a cationic group, and a cationized guar gum. .. In this composition, cationized guar gum is a component that contributes to the elasticity of foam.

On the other hand, Patent Document 2 describes an anionic surfactant and an amphoteric surfactant, a cationic polymer, and a polyoxyethylene alkyl ether (nonionic surfactant) having an HLB value in the range of 16.5 or more and 19.5 or less. ) Is disclosed, and Patent Document 3 discloses a composition containing two types of amino acid-based surfactants, amphoteric surfactants, and cationized polymers. These compositions have both foaming and foam elasticity.

JP-A-2018-172338 Japanese Unexamined Patent Publication No. 2016-44132 Japanese Unexamined Patent Publication No. 2016-193858

The higher the effect of foaming and foam elasticity (stiffness) during hair washing, the more it is possible to suppress hair entanglement and direct finger contact with the hair, and the results of studies aimed at improving its performance are shown above. It is shown in the literature. However, in actual use, not only improvement of each performance of foam but also comfortable feeling at the time of washing hair is required. One example is the feel of being gently wrapped in foam. On the other hand, when the effect of the elasticity of the foam is high, the foam becomes hard, and it may not be possible to satisfy the comfort such as the feeling of being gently wrapped in the foam during washing.

Therefore, a hair cleaning agent composition that foams for the purpose of suppressing the occurrence of split ends and split ends due to hair washing, improves the elasticity of the foam, and also has the softness that the elasticity of the foam shows good washing comfort at the time of washing the hair. It has been demanded.

Therefore, the problem to be solved by the present invention is a cleansing composition used for washing hair, which is excellent in foaming and foam elasticity (stiffness), and further forms soft foam showing good washing comfort. Is to provide a cleaning composition that can be used.

As a result of diligent studies by the present inventors in order to solve the above problems, foaming is improved by combining a polymer containing a specific monomer with an anionic surfactant, an amphoteric surfactant, and a cationic polymer. The present invention has been completed by finding that a detergent composition that forms a soft foam that has excellent foam elasticity and exhibits good washing comfort can be obtained.

（式（１）中、
Ｒ^１は水素原子またはメチル基を示し、
Ｒ^２は、炭素数１〜２４のアルキル基、炭素数１〜２４のアルケニル基または炭素数１〜２４のヒドロキシアルキル基を示し、
Ａは炭素数１〜１０のアルキレン基を示し、
Ｘは０または１を示し、
Ｙは、下記式（２）のヒドロキシウレタン構造および下記式（３）のヒドロキシウレタン構造からなる群より選ばれた１種以上の構造である。）

That is, the present invention is as follows.
(A) 0.01% by mass to 3% by mass of a polymer composed of a homopolymer of the monomer (a) represented by the following formula (1) or a copolymer of the monomer (a) and another copolymerizable monomer. ,
(B) Anionic surfactant 1% by mass to 20% by mass,
(C) 1% by mass to 20% by mass of amphoteric surfactant,
(D) (A) A hair cleansing composition comprising 0.05% by mass to 3% by mass of a cationic polymer other than the polymer, and (E) water.

(In equation (1),
R ¹ represents a hydrogen atom or a methyl group and represents
R ² represents an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 1 to 24 carbon atoms, or a hydroxyalkyl group having 1 to 24 carbon atoms.
A represents an alkylene group having 1 to 10 carbon atoms.
X indicates 0 or 1,
Y is one or more structures selected from the group consisting of the hydroxyurethane structure of the following formula (2) and the hydroxyurethane structure of the following formula (3). )

When the cleansing composition of the present invention is used for washing hair, it is possible to obtain the effect of forming soft foam that is excellent in foaming and foam elasticity (stiffness), and further exhibits good washing comfort.

Hereinafter, embodiments of the present invention will be described.
The cleaning composition of the present invention contains a component (A), a component (B), a component (C), a component (D), and a component (E). Hereinafter, each component will be described.

[Component (A)]
The polymer of the component (A) is a homopolymer composed of the monomer (a) described later, or one or more of the monomer (a) and another monomer (b) copolymerizable with the monomer (a), respectively. It is a composed copolymer.

The weight average molecular weight of the polymer of the component (A) can be determined by gel permeation chromatography (GPC) in terms of polystyrene, and is 10,000 to 1,000,000, preferably 10,000 to 10,000. It is 800,000, more preferably 10,000 to 300,000.
If the weight average molecular weight of the polymer of the component (A) is too low, the elasticity of the foam may be inferior, and if the weight average molecular weight is too high, the foaming may be inferior and the foam may become hard.

As the component (A), one kind or two or more kinds can be used.
The content of the component (A) in the cleaning agent composition of the present invention is 0.01% by mass to 3% by mass, and particularly preferably 0.1% by mass to 1% by mass. If the content of the component (A) is too small, foaming and foam elasticity (stiffness) may be inferior, and if the content of the component (A) is too large, foaming may be inferior and the foam may become hard.

[Monomer (a)]
The monomer (a) constituting the component (A) is represented by the following formula (1).

In the formula (1), R ¹ is a hydrogen atom or a methyl group, and a methyl group is particularly preferable from the viewpoint of easiness of polymerization.
R ² is an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 1 to 24 carbon atoms, or a hydroxyalkyl group having 1 to 24 carbon atoms.

Examples of the alkyl group and alkenyl group having 1 to 24 carbon atoms include a methyl group, an ethyl group, a propyl group, an n-butyl group, an iso-butyl group, a tert-butyl group, an n-hexyl group and an n-octyl group. Examples thereof include 2-ethylhexyl group, decyl group, dodecyl group, myristyl group, palmityl group, stearyl group, behenyl group, undecanyl group and oleyl group. The number of carbon atoms of these alkyl groups and alkenyl groups is preferably 10 to 22, and more preferably 16 to 22.

Examples of the hydroxyalkyl group having 1 to 24 carbon atoms include a hydroxymethyl group, a 2-hydroxyethyl group, a 3-hydroxypropyl group, a 2-hydroxypropyl group, a 4-hydroxybutyl group, a 5-hydroxybutyl group, and 8-hydroxybutyl group. Examples thereof include a hydroxyoctyl group, a 12-hydroxydodecyl group, and a 12-hydroxystearyl group. The number of carbon atoms of this hydroxyalkyl group is preferably 10 to 22, and more preferably 16 to 22.
R ² is preferably an alkyl group.

A is an alkylene group having 1 to 10 carbon atoms, preferably 6 or less carbon atoms, and more preferably 4 or less carbon atoms.
X is 0 or 1, and 0 is preferable in order to indicate the elasticity of the foam.

Y is one or more hydroxyurethane structures selected from the group consisting of the hydroxyurethane structures of the following formula (2) and the following formula (3). Of these, the structure of formula (2) is particularly preferable.

As the monomer (a), one type may be used alone, or two or more types may be used in combination.

Further, as the monomer (a), a hydroxyurethane structure of Y of the formula (1) mixed with an isomer of the monomer (a) represented by the following formulas (4) and (5) may be used. ..

[Monomer (b)]
The monomer (b) is a vinyl-based monomer copolymerizable with the monomer (a), and examples thereof include a (meth) acrylic acid ester compound, an aromatic alkenyl compound, a vinyl cyanide compound, and an acrylamide compound.

Examples of the (meth) acrylic acid ester compound include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, iso-butyl (meth) acrylate, tert-butyl (meth) acrylate, and n-. Examples thereof include hexyl (meth) acrylate, n-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, and stearyl (meth) acrylate.

Examples of the (meth) acrylic acid ester compound include those obtained by condensing (meth) acrylic acid with polyoxyalkylene glycol or glycerin, and examples thereof include polyethylene glycol mono (meth) acrylate and polypropylene glycol mono (meth) acrylate. , Polyethylene glycol-propylene glycol mono (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, lauroxy polyethylene glycol (meth) acrylate, glycerin mono (meth) acrylate and the like.

Examples of the aromatic alkenyl compound include styrene, o-methylstyrene, p-methylstyrene, p-methoxystyrene and the like.
Examples of the vinyl cyanide compound include acrylonitrile and methacrylonitrile.
Examples of the acrylamide compound include acrylamide and methacrylamide.

Further, a vinyl-based monomer having an ionic group in the structure is also mentioned as the monomer (b), for example, a monomer having a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, or the like as an anionic group. , A monomer having a quaternary ammonium or a salt thereof as a cationic group, a tertiary ammonium, an amino group, an amidino group, a guanidino group, etc., and a monomer having a carboxybetaine, a sulfobetaine, a betaine phosphate, a phosphorylcholine, etc. as an amphoteric group. Can be done.
As the monomer (b), one type may be used alone, or two or more types may be used in combination.

In the monomer mixture constituting the polymer (A), the total amount of the monomer (a) and the monomer (b) is 100 mol%.
Here, when the molar ratio of the monomer (a) is 100 mol%, the polymer of the component (A) becomes a homopolymer. When the molar ratio of the monomer (a) is less than 100 mol%, the polymer of the component (A) becomes a copolymer of the monomer (a) and the monomer (b). In this case, the ratio of the monomer (a) is preferably 0.1 mol% or more. The ratio of the monomer (a) is preferably 10 mol% or less, more preferably 5 mol% or less, still more preferably 2 mol% or less.

[Component (B)]
The component (B) is an anionic surfactant compounded to impart foaming and detergency to the cleaning agent composition.
Examples of the anionic surfactant include alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkylamide ether sulfates, polyoxyethylene amide ether sulfates, polyoxyethylene alkyl ether acetates, and alkyl phosphates. Polyoxyethylene alkyl ether phosphate, α-olefin sulfonate, higher fatty acid salt, N-acyl amino acid salt, N-acyl acetylionate, N-acyl methyl taurine salt, N-acyl polypeptide salt, alkyl sulfosuccinate And so on. Among these, alkyl sulfate ester salts, polyoxyethylene alkyl ether sulfate salts, N-acylmethyl taurine salts, and N-acyl amino acid salts are preferable.

The carbon number of these alkyl groups or acyl groups is preferably 10 to 18 and more preferably 12 to 14 from the viewpoint of foaming and detergency. The alkyl group or acyl group may be derived from a saturated fatty acid, an unsaturated fatty acid, or a mixed fatty acid which is a mixture thereof. Examples of the mixed fatty acid include coconut oil fatty acid and palm kernel oil fatty acid.

Examples of these counterions include alkali metal salts, alkaline earth metal salts, ammonium salts, alkanolamine salts, amino acid salts and the like.
Specific examples of the anionic surfactant of the component (B) include PEG (3) sodium lauryl ether sulfate, sodium cocoyl methyl taurine, sodium cocoyl methyl taurine taurine, sodium cocoyl glutamate, sodium lauroyl methyl alanine and the like. ..
As the component (B), one or more selected from the above anionic surfactants can be used.

The content of the component (B) in the cleaning agent composition of the present invention is 1% by mass to 20% by mass, preferably 5% by mass to 15% by mass. If the content of the component (B) is too small, foaming and foam elasticity may be inferior, and if the content of the component (B) is too large, the foam may become hard.

[Component (C)]
The component (C) is an amphoteric surfactant, which is a surfactant having a structure having both an N-acyl group or an N-alkyl group and a cationic group and an anionic group. Examples thereof include alkylbetaine, alkylamide betaine, alkylhydroxysulfobetaine, alkylamide hydroxysulfobetaine, alkylcarboxymethylhydroxyethyl imidazolinium betaine, alkylamide hydroxyethyl amino acid amphoteric tenside, alkyliminodiacetic acid salt and the like. ..

The N-acyl group contained in the above amphoteric surfactant is, for example, a linear or branched fatty acid residue having 8 to 18 carbon atoms. Fatty acids of fatty acid residues include, for example, saturated fatty acids such as capric acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid; palmitooleic acid, oleic acid, elaidic acid, linoleic acid, and linolene. Unsaturated fatty acids such as acids; and mixtures thereof such as coconut oil fatty acids, palm kernel oil fatty acids, beef fatty acids, and hardened beef fatty acids. Among these, lauric acid, myristic acid, palmitic acid, oleic acid, coconut oil fatty acid, and palm kernel oil fatty acid are preferable. More preferably, it is lauric acid, coconut oil fatty acid, and palm kernel oil fatty acid.

The alkyl group contained in the above amphoteric surfactant is, for example, a hydrocarbon group having 8 to 18 carbon atoms, and also includes a mixed alkyl group derived from a mixed fatty acid. For example, alkyl groups such as caprylyl group, capryl group, lauryl group, myristyl group, palmitic acid group, stearyl group and oleyl group; mixed alkyl groups such as coconut oil alkyl group, palm kernel oil alkyl group and beef tallow alkyl group can be mentioned. Among these, a lauryl group, a myristyl group, a palmitic group, a coconut oil alkyl group, and a palm kernel oil alkyl group are preferable. More preferably, it is a lauryl group, a coconut oil alkyl group, or a palm kernel oil alkyl group.

Specific examples of the amphoteric surfactant of the component (C) include lauryl betaine, coconut oil fatty acid amide propyl betaine, palm kernel oil fatty acid amide propyl betaine, lauryl hydroxysulfobetaine, sodium cocoamphoacetate and the like.
As the component (C), one or more selected from the above amphoteric surfactants can be used.

The content of the component (C) in the cleaning agent composition of the present invention is 1% by mass to 20% by mass, preferably 5% by mass to 15% by mass, and 5% by mass to 10% by mass. Is particularly preferable. If the content of the component (C) is too small, the elasticity (stiffness) of the foam may be inferior, and if the content of the component (C) is too large, the foaming may be inferior and the foam may become hard.

[Component (D)]
The component (D) is a cationic polymer other than the component (A), for example, a homopolymer of dialkyldialylammonium chloride, a copolymer of dialkyldialylammonium chloride and (meth) acrylate, dialkyldialylammonium chloride and (meth). ) Polymers with acrylamide, polymethacryloyloxyethyltrimethylammonium chloride, cationized cellulose, cationized starch, cationized guar gum, cationized tara gum, cationized locust bean gum, cationized xanthan gum, cationized phenuglique gum, vinyl imidazole Copolymers of linium trichloride and vinyl pyrrolidone, copolymers of hydroxyethyl cellulose and dimethyldialylammonium chloride, copolymers of vinylpyrrolidone and dimethylaminoethyl methacrylate, polyvinylpyrrolidone, alkylaminoacrylate and vinyl caprolactam Copolymers, copolymers of vinylpyrrolidone and methacrylicamidopropyltrimethylammonium chloride, copolymers of alkylacrylamide, acrylate, alkylaminoalkylacrylamide and polyoxyethylene glycol methacrylate, adiponic acid and dimethylaminohydroxypropylethylenetriamine Examples include the copolymer of. Among these, cationized cellulose, cationized guar gum, cationized tara gum, homopolymer of dialkyldialylammonium chloride, and copolymer of dialkyldialylammonium chloride and (meth) acrylamide are preferable.

The degree of cationization of the cationic polymer can be calculated from the measured value of the N content such as the Kjeldahl method, and is preferably 0.2 to 3 meq / g, particularly preferably 0.5 to 2 meq / g. is there. The unit of degree of cationization, meq / g, indicates the number of milliequivalents of N-cationic groups per 1 g of sample.

The weight average molecular weight of the cationic polymer is preferably in the range of 100,000 to 3,000,000, particularly preferably in the range of 400,000 to 2,000,000.

The weight average molecular weight of the cationic polymer can be determined in terms of polyethylene glycol by using gel permeation chromatography (GPC).
As the component (D), one or more selected from the above cationic polymers can be used.

The content of the component (D) in the cleaning agent composition of the present invention is 0.05% by mass to 3% by mass, preferably 0.1% by mass to 1% by mass.

[Component (E)]
The component (E) is water, and purified water such as distilled water or ion-exchanged water can be preferably used.
The component (E) in the present invention is contained as a balance so that the total of the component (A) to the component (E) is 100% by mass.

Further, other optional components can be added to the cleaning composition of the present invention as long as the effects of the present invention are not impaired.
Other optional components include, for example, fats and oils such as vegetable fats and oils, animal fats and oils; hydrocarbon oils such as squalane, liquid paraffin, and hydrogenated polyisobutene; higher alcohols such as cetyl alcohol, stearyl alcohol, and cetostearyl alcohol; cyclic silicones. , Silicones such as dimethylpolysiloxane, amino-modified polysiloxane; ester oils such as 2-ethylhexyl palmitate, tri (capril / capric acid) glyceryl, isopropyl myristate; stearyltrimethylammonium chloride, benzalconium chloride, cocoyl arginine ethyl Cationic surfactants such as PCA; nonionic surfactants such as polyoxyethylene alkyl ether, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester; hydroxyethyl cellulose, hydroxypropyl cellulose, polyethylene glycol, polyvinyl alcohol, carboxyvinyl Water-soluble polymers other than component (A) and component (D) such as polymer; solvents such as ethanol, propylene glycol and glycerin; pH adjusters such as citrate, succinate, malate and tartrate; tocopherol Antioxidants such as; polysaccharides, amino acids, peptides, preservatives, fragrances, colorants and the like can be appropriately blended.

The pH of the hair cleansing composition of the present invention is not particularly limited, but is preferably 4.5 to 8.0, more preferably 5.0 to 7.5, and particularly preferably the undiluted solution at 25 ° C. It is 5.5 to 7.0.

Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

<Preparation of cleaning agent composition>
The component (A) shown in Table 1 is mixed with the component (B), the component (C), the component (D) and the component (E) shown in Table 2 according to a usual method, and the following (1) to (3) Evaluation was performed by the method. The numbers in Table 2 indicate mass%.

<Evaluation of cleaning agent composition>
Regarding Examples and Comparative Examples, (1) foaming was evaluated using a miller, (2) foam elasticity (stiffness) was evaluated using a glass petri dish with a diameter of 5 cm as a weight, and (3) foam softness was evaluated. Evaluation was made using two 1-yen coins as weights.

(1) Foaming Take 10 mL of the cleaning agent composition of each formulation example, dilute it with purified water so that the total volume becomes 50 mL, and use a miller (“IFM-100” manufactured by Iwatani Corporation) 5 The foam height in the miller container after whipping for 2 seconds and allowing to stand for 1 minute was measured. Based on the measured bubble height, a four-grade evaluation of ◎, ○, Δ, and × was performed, and ◎ and ○ were evaluated as acceptable.
<Evaluation criteria>

⊚: 70 mm or more ○: 60 mm or more and less than 70 mm Δ: 50 mm or more and less than 60 mm ×: less than 50 mm

(2) Foam elasticity
10 mL of the cleaning agent composition of each formulation example was taken, diluted with purified water so that the total volume became 50 mL, placed in a bowl, and whipped with a hand mixer for 30 seconds. The formed foam was placed in a 200 mL beaker and allowed to stand for 30 seconds, and then a glass petri dish (16 g) having a diameter of 5 cm was placed on the foam, and the time until the petri dish appeared in the liquid at the bottom of the beaker was measured. From the measured time, a four-grade evaluation of ◎, ○, △, and × was performed, and ◎ and ○ were regarded as acceptable.
<Evaluation criteria>

⊚: Measured time is 15 seconds or more ○: Measured time is 10 seconds or more and less than 15 seconds Δ: Measured time is 5 seconds or more and less than 10 seconds ×: Measured time is less than 5 seconds

(3) Softness of foam 10 mL of the cleaning agent composition of each formulation example was taken, diluted with purified water so that the total volume became 50 mL, placed in a bowl, and whipped with a hand mixer for 30 seconds. Fill a 200 mL beaker with the formed foam, let stand for 30 seconds, and then place two 1-yen coins on top of each other (2 g) horizontally on the foam, and the 1-yen coin will appear in the liquid at the bottom of the beaker. Time to time was measured. From the measured time, a four-grade evaluation of ◎, ○, △, and × was performed, and ◎ and ○ were regarded as acceptable.
<Evaluation criteria>

⊚: Measured time is 2 minutes 30 seconds or more and less than 3 minutes 30 seconds ○: Measured time is 2 minutes 00 seconds or more and less than 2 minutes 30 seconds, or 3 minutes 30 seconds or more and less than 4 minutes 00 seconds △ : Measured time is 1 minute 30 seconds or more and less than 2 minutes 00 seconds, or 4 minutes 00 seconds or more and less than 4 minutes 30 seconds ×: Measured time is less than 1 minute 30 seconds or 4 minutes 30 seconds or more

In Examples 1 to 5, all had good foaming, foam elasticity (stiffness), and foam softness.

On the other hand, in Comparative Example 1, since the component (A) was not contained, the elasticity (stiffness) of the foam and the softness of the foam were insufficient.
In Comparative Example 2, although the elasticity (stiffness) of the foam was improved by the component (D), the component (A) was not contained, and the foaming and the softness of the foam were insufficient.

Claims (1)

(A) 0.01% by mass to 3% by mass of a polymer composed of a homopolymer of the monomer (a) represented by the following formula (1) or a copolymer of the monomer (a) and another copolymerizable monomer. ,
(B) Anionic surfactant 1% by mass to 20% by mass,
(C) 1% by mass to 20% by mass of amphoteric surfactant,
(D) (A) A hair cleansing composition comprising 0.05% by mass to 3% by mass of a cationic polymer other than the polymer, and (E) water.

(In equation (1),
R ¹ represents a hydrogen atom or a methyl group and represents
R ² represents an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 1 to 24 carbon atoms, or a hydroxyalkyl group having 1 to 24 carbon atoms.
A represents an alkylene group having 1 to 10 carbon atoms.
X indicates 0 or 1,
Y is one or more structures selected from the group consisting of the hydroxyurethane structure of the following formula (2) and the hydroxyurethane structure of the following formula (3). )