JP2021063016A - Body washing composition - Google Patents

Abstract

To provide a body washing composition that is excellent in foaming and foam resilience (elasticity) and can form soft foam having a good washing feel.SOLUTION: A body washing composition contains (A): a polymer consisting of a specific, hydroxy urethane structure-bearing (meth) acrylate homopolymer or a copolymer of the homopolymer with another monomer, of 0.01 mass%-3 mass%, (B): a C8-22 fatty acid salt of 1 mass%-30 mass%, (C): an ampholytic surfactant of 1 mass%-30 mass%, (D): an anionic surfactant excluding (B) of 1 mass%-20 mass%, and (E): water.SELECTED DRAWING: None

Description

The present invention relates to a body cleansing composition.

With respect to body cleansing compositions such as body soap, many techniques have been disclosed so far for the purpose of washing away dirt adhering to the skin and preparing a comfortable skin environment. Among them, not only excellent detergency, but also the feeling of the skin is suppressed by suppressing the feeling of tension after washing with the higher fatty acid alkaline salt used as the main component, and suppressing the disappearance of the feeling of refreshing due to the solution of the problem. There is also something about.

Further, to solve the problem that the skin directly hits the finger or towel during washing and causes friction to cause skin trouble, one of the solutions is to improve the foaming and foam quality during washing. Specifically, good foaming produces enough foam to suppress contact with the skin, and high foam elasticity (stiffness) causes the foam to disappear during washing and reduce cushioning properties. Prevents contact between fingers and skin.

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 alkyl ether carboxylic acid, a fatty acid, a cationic polymer, and a base, and Patent Document 2 discloses a higher fatty acid salt, a cationic polymer, an anionic surfactant, an amphoteric surfactant, and a polyvalent composition. Compositions containing alcohol are disclosed. In this composition, a cationic polymer and a polyhydric alcohol are components that contribute to the elasticity of foam.

Further, Patent Document 3 describes polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether carboxylic acid or a salt thereof, a cationic group-containing polymer, an inorganic salt or an organic acid salt, a polyoxyethylene alkyl ether type nonionic surfactant, and the like. Compositions comprising higher fatty acids or higher alcohols or alkyl glyceryl ethers are disclosed. Although this composition does not contain a higher fatty acid as a main component, it contains a polyoxyethylene alkyl ether type nonionic surfactant to improve the elasticity of foam.

Japanese Unexamined Patent Publication No. 2013-139439 JP-A-2019-94287 JP-A-2009-263289

The higher the effect of foaming and foam elasticity (stiffness) during washing, the more it is possible to suppress the direct contact between the fingers and the skin, and the results of studies aimed at improving its performance are described in the literature shown above. It is shown. However, in actual use, not only improvement of each performance of foam but also comfortable feeling at the time of cleaning 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, there is a need for a body cleansing composition that foams for the purpose of suppressing the generation of friction during washing, improves the elasticity of the foam, and also has the softness that the elasticity of the foam shows good washing comfort during washing. ing.

Therefore, the problem to be solved by the present invention is a cleansing composition used for washing the body, 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, by combining a polymer containing a specific monomer with a fatty acid salt, an amphoteric surfactant, and an anionic surfactant, foaming is good and foaming is achieved. The present invention has been completed by finding that a detergent composition that forms a soft foam that has excellent 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種以上のヒドロキシウレタン構造である。）

That is, the body cleansing composition according to the present invention is
(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) 1% by mass to 30% by mass of a fatty acid salt having 8 to 22 carbon atoms,
(C) 1% by mass to 30% by mass of amphoteric surfactant,
It is characterized by containing (D) 1% by mass to 20% by mass of an anionic surfactant other than the fatty acid salt having 8 to 22 carbon atoms, 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 hydroxyurethane 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 body cleansing composition of the present invention is used for washing the body, 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 body cleansing 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 component (A) is a homopolymer of the monomer (a) represented by the formula (1) or a polymer composed of a copolymer of the monomer (a) and another copolymerizable monomer (b).

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 having 1 to 24 carbon atoms and the 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 and an n-hexyl group. , N-octyl group, 2-ethylhexyl group, decyl group, dodecyl group, myristyl group, palmityl group, stearyl group, behenyl group, undecanyl group, oleyl group and the like. 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 structure of the following formula (2) and the hydroxyurethane structure of 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.

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 or , 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 a fatty acid salt having 8 to 22 carbon atoms.
The number of carbon atoms of the fatty acid is preferably 10 to 20, and particularly preferably 12 to 18. Examples of fatty acids having 8 to 22 carbon atoms include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, isoparmitic acid, stearic acid, isostearic acid, and oleic acid. In addition, a mixed fatty acid which is a mixture of fatty acids can also be used, and examples of such a mixed fatty acid include coconut oil fatty acid, palm kernel oil fatty acid, and beef tallow fatty acid. Lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, coconut oil fatty acid, palm kernel oil fatty acid are preferable, and lauric acid, myristic acid, palmitic acid, stearic acid, coconut oil fatty acid, palm kernel oil are more preferable. It is a fatty acid.

Examples of the counter ion forming the salt include alkali metal salts such as sodium and potassium, and organic amine salts such as monoethanolamine, diethanolamine and triethanolamine. It is preferably sodium, potassium, triethanolamine, and more preferably potassium.
As the component (B), one or more of the above fatty acid salts can be used.

The content of the component (B) in the cleaning agent composition of the present invention is 1% by mass to 30% by mass, preferably 5% by mass to 25% by mass, and 10% by mass to 20% by mass. Is more preferable, and 12% by mass to 20% by mass is particularly preferable.
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 20 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 30% by mass, preferably 1% by mass to 20% by mass, and 1% by mass to 10% by mass. Is more 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 an anionic surfactant other than the component (B).
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. Examples thereof include polyoxyethylene alkyl ether phosphate, α-olefin sulfonate, N-acyl amino acid salt, N-acyl acetylionate, N-acyl methyl taurine salt, N-acyl polypeptide salt, alkyl sulfosuccinate and the like. ..

The number of carbon atoms of these alkyl groups or acyl groups is preferably 10 to 18, and more preferably 12 to 14. 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 (D) include PEG (3) sodium lauryl ether sulfate, sodium cocoyl methyl taurine, sodium cocoyl glutamate, sodium lauroyl methyl alanine and the like.

As the component (D), one or more selected from the above anionic surfactants can be used.
The content of the component (D) in the cleaning agent composition of the present invention is 1% by mass to 20% by mass, preferably 1% by mass to 15% by mass, and 1% by mass to 10% by mass. Is more preferable. If the content of the component (D) is too small, the foam may become hard, and if the content of the component (D) is too large, foaming and the elasticity of the foam may be inferior.

[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 components can be added to the cleaning composition of the present invention as long as the effects of the invention are not impaired, and other optional components include, for example, fats and oils such as vegetable fats and oils, animal fats and oils; squalane, and the like. Hydrocarbon oils such as liquid paraffin and hydrogenated polyisobutene; higher alcohols such as cetyl alcohol, stearyl alcohol and cetostearyl alcohol; silicones such as cyclic silicone, dimethylpolysiloxane and amino-modified polysiloxane; 2-ethylhexyl palmitate, tri (Capril / capric acid) Ester oils such as glyceryl, isopropyl myristate; cationic surfactants such as stearyltrimethylammonium chloride, benzalconium chloride, cocoylarginine ethyl PCA; polyoxyethylene alkyl ethers, polyglycerin fatty acid esters, poly Nonionic surfactants such as oxyethylene glycerin fatty acid esters; water-soluble polymers such as dimethyldiallylammonium chloride / acrylamide copolymers, hydroxyethyl cellulose, hydroxypropyl cellulose, polyethylene glycol, polyvinyl alcohols, carboxyvinyl polymers; ethanol, propylene Solvents such as glycol and glycerin; pH adjusters such as citrate, succinate, malate and tartrate; antioxidants such as tocopherol; polysaccharides, amino acids, peptides, preservatives, fragrances, colorants, etc. It can be appropriately blended.

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 body cleansing 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 methods (1) to (3) below are used. Was evaluated by. The numbers in Table 2 indicate mass%.

<Evaluation of body cleansing composition>
For Examples and Comparative Examples, (1) foaming was evaluated using a miller, and (2) foam elasticity (stiffness) and (3) foam softness were evaluated using a glass petri dish with a diameter of 5 cm as a weight. ..

(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 75 mL, and use a miller (“IFM-100” manufactured by Iwatani Corporation) 5 The foam height in the miller container was measured after whipping for seconds and allowing to stand for 10 seconds. Based on the measured bubble height, a four-grade evaluation of ◎, ○, Δ, and × was performed, and ◎ and ○ were evaluated as acceptable.
<Evaluation criteria>
⊚: 90 mm or more ○: 85 mm or more and less than 90 mm Δ: 80 mm or more and less than 85 mm ×: less than 80 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 75 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 height from the bottom of the petri dish to the top of the beaker was measured 1 minute later. .. From the measured height, a four-grade evaluation of ◎, ○, △, and × was performed, and ◎ and ○ were accepted. The total height from the bottom of the beaker to the top of the beaker is 85 mm.
<Evaluation criteria>
⊚: Less than 10 mm ○: 10 mm or more and less than 15 mm Δ: 15 mm or more and less than 20 mm ×: 20 mm or more

(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 75 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, then place a glass petri dish (16 g) with a diameter of 5 cm on the foam, and after 1 minute, the height from the top of the overflowing foam to the top of the beaker. Was measured. From the measured height, a four-grade evaluation of ◎, ○, △, and × was performed, and ◎ and ○ were accepted.
<Evaluation criteria>
⊚: 10 mm or more and less than 15 mm ○: 5 mm or more and less than 10 mm, or 15 mm or more and less than 20 mm Δ: 2 mm or more and less than 5 mm, or 20 mm or more and less than 25 mm ×: less than 2 mm or 25 mm or more

In Examples 1 to 6, 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 (B), 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) 1% by mass to 30% by mass of a fatty acid salt having 8 to 22 carbon atoms,
(C) 1% by mass to 30% by mass of amphoteric surfactant,
A body cleansing composition comprising (D) (B) 1% by mass to 20% by mass of an anionic surfactant other than a fatty acid salt having 8 to 22 carbon atoms, 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 hydroxyurethane structures selected from the group consisting of the hydroxyurethane structure of the following formula (2) and the hydroxyurethane structure of the following formula (3). )