JP7205728B2 - Body wash composition - Google Patents

Description

The present invention relates to personal cleansing compositions.

BACKGROUND ART With regard to body cleansing compositions such as body soaps, 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 are not only excellent detergency, but also the feeling of the skin, such as suppressing the feeling of tightness after washing due to the higher fatty acid alkali salt used as the main ingredient, and suppressing the loss of refreshing feeling associated with solving the problem. There are also things about

In addition, one of the solutions to the problem of causing skin troubles due to friction caused by direct contact with fingers, towels, etc. during washing is to improve foaming and foam quality during washing. Specifically, good foaming creates enough foam to suppress contact with the skin, and the high elasticity of the foam causes the foam to disappear during washing, resulting in a decrease in cushioning properties. Avoid contact between fingers and skin.

Many techniques focusing on such foaming and elasticity of foam have been disclosed so far.
Among them, focusing on foam elasticity, 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 A composition comprising alcohol is disclosed. In this composition, the cationic polymer and polyhydric alcohol are components that contribute to foam elasticity.

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

JP 2013-139439 A JP 2019-94287 A JP 2009-263289 A

The more effective the foaming and elasticity of the foam during washing, the more effective it is in suppressing direct contact between fingers and the skin. It is shown. However, in actual use, it is required not only to improve each performance of the foam but also to provide a comfortable feel during washing. One example is the sensation of being gently wrapped in foam. On the other hand, if the elasticity (kosi) of the foam is high, the foam becomes hard, and it may not be possible to satisfy the pleasant feeling of being gently wrapped in the foam during washing.

Therefore, there is a demand for a body cleanser composition that foams and improves the elasticity of the foam for the purpose of suppressing the generation of friction during cleaning, and that the elasticity of the foam also provides a softness that provides a good washing feeling during cleaning. ing.

Accordingly, the problem to be solved by the present invention is to provide a cleansing composition for use in cleaning the body, which is excellent in foaming and foam elasticity (resilience), and forms a soft foam exhibiting good washing comfort. It is to provide a cleaning composition that can

In order to solve the above problems, the inventors of the present invention conducted intensive studies and found that by combining a polymer containing a specific monomer as a constituent with a fatty acid salt, an amphoteric surfactant, or an anionic surfactant, good foaming can be achieved. The inventors have found that it is possible to obtain a detergent composition which has excellent elasticity (resilience) and which forms soft foam exhibiting good washing comfort, thus completing the present invention.

（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 consisting of a homopolymer of a monomer (a) represented by the following formula (1) or a copolymer of a monomer (a) and another monomer that can be copolymerized ,
(B) 1% to 30% by mass of a fatty acid salt having 8 to 22 carbon atoms;
(C) 1% to 30% by mass of an amphoteric surfactant,
(D) (B) 1% to 20% by mass of an anionic surfactant other than a fatty acid salt having 8 to 22 carbon atoms, and (E) water.

(In formula (1),
R ¹ represents a hydrogen atom or a methyl group,
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 represents 0 or 1,
Y is one or more hydroxyurethane structures selected from the group consisting of a hydroxyurethane structure of formula (2) below and a hydroxyurethane structure of formula (3) below. )

When the body cleansing composition of the present invention is used for cleansing the body, it is possible to obtain the effects of excellent foaming and foam elasticity (resilience) and the formation of soft foam exhibiting good washing comfort.

Embodiments of the present invention will be described below.
The personal cleansing composition of the present invention contains component (A), component (B), component (C), component (D), and component (E). Each component will be described below.

[Component (A)]
Component (A) is a polymer comprising a homopolymer of monomer (a) represented by formula (1) or a copolymer of monomer (a) and other copolymerizable monomer (b).

The weight average molecular weight of the polymer of component (A) can be determined in terms of polystyrene using gel permeation chromatography (GPC), and is 10,000 to 1,000,000, preferably 10,000 to 800,000, more preferably 10,000 to 300,000.
If the weight-average molecular weight of the polymer of component (A) is too low, the elasticity of the foam may be poor.

One or two or more can be used as the component (A).
The content of component (A) in the detergent composition of the present invention is 0.01% by mass to 3% by mass, preferably 0.1% by mass to 1% by mass. If the content of component (A) is too low, foaming and foam elasticity (resilience) may be poor.

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

In formula (1), R ¹ is a hydrogen atom or a methyl group, and a methyl group is particularly preferred from the viewpoint of ease 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 alkyl groups having 1 to 24 carbon atoms and alkenyl groups having 1 to 24 carbon atoms include methyl group, ethyl group, propyl group, n-butyl group, iso-butyl group, tert-butyl group and n-hexyl group. , n-octyl group, 2-ethylhexyl group, decyl group, dodecyl group, myristyl group, palmityl group, stearyl group, behenyl group, undecanyl group and oleyl group. These alkyl groups and alkenyl groups preferably have 10 to 22 carbon atoms, more preferably 16 to 22 carbon atoms.

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

A is an alkylene group having 1 to 10 carbon atoms, preferably 6 or less carbon atoms, 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 a hydroxyurethane structure of formula (2) below and a hydroxyurethane structure of formula (3) below. Among these, the structure of formula (2) is particularly preferred.

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

As the monomer (a), a mixture of the hydroxyurethane structure of Y in the formula (1) and the isomers of the monomer (a) represented by the following formulas (4) and (5) may be used. .

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

Examples of (meth)acrylic ester compounds include methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, iso-butyl (meth)acrylate, tert-butyl (meth)acrylate, n- Hexyl (meth)acrylate, n-octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, decyl (meth)acrylate, dodecyl (meth)acrylate, stearyl (meth)acrylate and the like can be mentioned.

Further, the (meth)acrylic acid ester compound also includes those obtained by condensing (meth)acrylic acid and polyoxyalkylene glycol, or glycerin, for example, polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate , polyethylene glycol-propylene glycol mono (meth) acrylate, methoxy polyethylene glycol (meth) acrylate, lauroxy polyethylene glycol (meth) acrylate, glycerin mono (meth) acrylate and the like.

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

Further, vinyl-based monomers having an ionic group in the structure are also included as the monomer (b). , monomers having cationic groups such as quaternary ammonium or salts thereof, tertiary ammonium, amino groups, amidino groups, guanidino groups, etc., and monomers having amphoteric groups such as carboxybetaine, sulfobetaine, betaine phosphate, phosphorylcholine, etc. can be done.

One type of the monomer (b) 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 monomers (a) and (b) is 100 mol%.
Here, when the molar ratio of monomer (a) is 100 mol %, the polymer of component (A) becomes a homopolymer. When the molar ratio of monomer (a) is less than 100 mol %, the polymer of component (A) is a copolymer of monomer (a) and monomer (b). In this case, the proportion of monomer (a) is preferably 0.1 mol % or more. Moreover, the ratio of the monomer (a) is preferably 10 mol % or less, more preferably 5 mol % or less, and even more preferably 2 mol % or less.

[Component (B)]
Component (B) is a fatty acid salt having 8 to 22 carbon atoms.
The number of carbon atoms in the fatty acid is preferably 10-20, particularly preferably 12-18. Examples of fatty acids having 8 to 22 carbon atoms include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, isopalmitic acid, stearic acid, isostearic acid, and oleic acid. Mixed fatty acids, which are mixtures of fatty acids, can also be used, and examples of such mixed fatty acids include coconut oil fatty acid, palm kernel oil fatty acid, and beef tallow fatty acid. Preferred are lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, coconut oil fatty acid and palm kernel oil fatty acid, more preferred are lauric acid, myristic acid, palmitic acid, stearic acid, coconut oil fatty acid and palm kernel oil. fatty acids.

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

The content of component (B) in the detergent composition of the present invention is 1% to 30% by mass, preferably 5% to 25% by mass, and 10% to 20% by mass. is more preferred, and 12% by mass to 20% by mass is particularly preferred.
If the content of component (B) is too low, foaming and foam elasticity (resilience) may be poor, and if the content of component (B) is too high, the foam may become hard.

[Component (C)]
Component (C) is an amphoteric surfactant having a structure having both an N-acyl group or an N-alkyl group, a cationic group and an anionic group. Examples thereof include alkylbetaine, alkylamidobetaine, alkylhydroxysulfobetaine, alkylamidohydroxysulfobetaine, alkylcarboxymethylhydroxyethylimidazolinium betaine, alkylamidohydroxyethyl amino acid amphoteric surfactant, and alkyliminodiacetate. .

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 caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid; and mixtures thereof such as coconut oil fatty acid, palm kernel oil fatty acid, tallow fatty acid, hydrogenated tallow fatty acid, and the like. Among these, lauric acid, myristic acid, palmitic acid, oleic acid, coconut oil fatty acid, and palm kernel oil fatty acid are preferred. More preferred are 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, including mixed alkyl groups derived from mixed fatty acids. Examples thereof include alkyl groups such as caprylyl group, capryl group, lauryl group, myristyl group, palmityl group, stearyl group and oleyl group; and mixed alkyl groups such as coconut oil alkyl group, palm kernel oil alkyl group and tallow alkyl group. Among these, lauryl group, myristyl group, palmityl group, coconut oil alkyl group and palm kernel oil alkyl group are preferred. Lauryl groups, coconut oil alkyl groups, and palm kernel oil alkyl groups are more preferred.

Specific examples of component (C) amphoteric surfactants include lauryl betaine, coconut amidopropyl betaine, palm kernel amidopropyl betaine, lauryl hydroxysulfobetaine, and sodium cocoamphoacetate.
As the component (C), one or two or more selected from the above amphoteric surfactants can be used.

The content of component (C) in the detergent composition of the present invention is 1% to 30% by mass, preferably 1% to 20% by mass, and 1% to 10% by mass. is more preferred.
If the content of component (C) is too low, the elasticity of the foam may be poor.

[Component (D)]
Component (D) is an anionic surfactant other than component (B).
Examples of anionic surfactants include alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkylamide ether sulfates, polyoxyethylene amide ether sulfates, polyoxyethylene alkyl ether acetates, alkyl phosphates, Polyoxyethylene alkyl ether phosphate, α-olefin sulfonate, N-acyl amino acid salt, N-acyl isethionate, N-acyl methyl taurate, N-acyl polypeptide salt, alkyl sulfosuccinate, etc. .

These alkyl groups or acyl groups preferably have 10 to 18 carbon atoms, more preferably 12 to 14 carbon atoms. Alkyl groups and acyl groups may be derived from saturated fatty acids, unsaturated fatty acids, or mixed fatty acids, which are mixtures thereof. Mixed fatty acids include, for example, coconut oil fatty acid, palm kernel oil fatty acid, and the like.

These counterions include, for example, alkali metal salts, alkaline earth metal salts, ammonium salts, alkanolamine salts, amino acid salts and the like.
Specific examples of component (D) anionic surfactants include PEG (3) sodium lauryl ether sulfate, sodium cocoyl methyl taurate, sodium cocoyl glutamate, sodium lauroyl methyl alanine, and the like.

As component (D), one or more selected from the above anionic surfactants can be used.
The content of component (D) in the detergent 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 preferred. If the content of component (D) is too low, the foam may become hard, and if the content of component (D) is too high, foaming and elasticity (firmness) of the foam may be poor.

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

Furthermore, other components can be added to the detergent composition of the present invention as long as they do not impair the effects of the invention. Other optional components include, for example, oils and fats such as vegetable oils and animal oils; squalane; 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; (Caprylic/capric acid) glyceryl, ester oils such as isopropyl myristate; cationic surfactants such as stearyltrimethylammonium chloride, benzalkonium chloride, cocoyl arginine ethyl PCA; polyoxyethylene alkyl ether, polyglycerin fatty acid ester, poly Nonionic surfactants such as oxyethylene glycerol fatty acid esters; water-soluble polymers such as dimethyldiallylammonium chloride/acrylamide copolymer, hydroxyethyl cellulose, hydroxypropyl cellulose, polyethylene glycol, polyvinyl alcohol, carboxyvinyl polymer; ethanol, propylene Solvents such as glycol and glycerin; pH adjusters such as citrate, succinate, malate, and tartrate; antioxidants such as tocopherol; They can be blended as appropriate.

EXAMPLES The present invention will be specifically described below by way of Examples and Comparative Examples, but the present invention is not limited to these Examples.

<Preparation of body cleansing composition>
Component (A) shown in Table 1 is mixed with component (B), component (C), component (D) and component (E) shown in Table 2 according to a conventional method, and the following methods (1) to (3) are mixed. was evaluated by In addition, the numbers in Table 2 indicate % by mass.

<Evaluation of Body Cleansing Composition>
For the examples and comparative examples, (1) foaming was evaluated using a miller, and (2) foam elasticity and (3) foam softness were evaluated using a glass petri dish with a diameter of 5 cm as a weight. .

(1) Foaming 10 mL of the detergent composition of each formulation example was taken and diluted with purified water so that the total amount was 75 mL. After foaming for 10 seconds and standing still for 10 seconds, the foam height in the miller container was measured. Based on the measured foam height, evaluation was performed in four stages of ⊚, ∘, Δ, and x, and ⊚ and ∘ were regarded as acceptable.
<Evaluation Criteria>
◎: 90 mm or more ○: 85 mm or more and less than 90 mm △: 80 mm or more and less than 85 mm ×: less than 80 mm

(2) Elasticity of foam
10 mL of the detergent composition of each formulation example was taken, diluted with purified water to a total volume of 75 mL, placed in a bowl, and whipped with a hand mixer for 30 seconds. A 200 mL beaker was filled with the formed bubbles and allowed to stand for 30 seconds, then a glass petri dish (16 g) with a diameter of 5 cm was placed on the bubbles, and the height from the bottom of the petri dish to the top of the beaker was measured after 1 minute. . Based on the measured height, a four-level evaluation of ⊚, ∘, Δ, and × was performed, and ⊚ and ∘ were regarded as acceptable. 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 △: 15 mm or more and less than 20 mm ×: 20 mm or more

(3) Foam softness 10 mL of the detergent composition of each formulation example was taken, diluted with purified water to a total volume of 75 mL, placed in a bowl, and foamed with a hand mixer for 30 seconds. Fill a 200 mL beaker with the formed foam, let it stand for 30 seconds, place a glass petri dish (16 g) with a diameter of 5 cm on top of the foam, and measure the height from the top of the overflowing foam to the top of the beaker after 1 minute. was measured. Based on the measured height, a four-level evaluation of ⊚, ∘, Δ, and × was performed, and ⊚ and ∘ were regarded as acceptable.
<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 △: 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, foaming, foam resilience (resilience), and foam softness were all good.

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

Claims (1)

(A) 0.01% by mass to 3% by mass of a polymer consisting of a homopolymer of a monomer (a) represented by the following formula (1) or a copolymer of a monomer (a) and another monomer that can be copolymerized ,
(B) 1% to 30% by mass of a fatty acid salt having 8 to 22 carbon atoms;
(C) 1% to 30% by mass of an amphoteric surfactant,
(D) (B) 1% to 20% by mass of an anionic surfactant other than a fatty acid salt having 8 to 22 carbon atoms; and (E) water.

(In formula (1),
R ¹ represents a hydrogen atom or a methyl group,
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 represents 0 or 1,
Y is one or more hydroxyurethane structures selected from the group consisting of a hydroxyurethane structure of formula (2) below and a hydroxyurethane structure of formula (3) below. )