WO2024135069A1

WO2024135069A1 - Cleaning agent

Info

Publication number: WO2024135069A1
Application number: PCT/JP2023/037448
Authority: WO
Inventors: 萌生千田; 由樹渡邊; 理絵栗延
Original assignee: 株式会社資生堂
Priority date: 2022-12-20
Filing date: 2023-10-16
Publication date: 2024-06-27

Abstract

[Problem] To provide a cleaning agent having a small burden on the environment and having excellent foam quality and feeling of use. [Solution] This cleaning agent comprises (A) a hydrolysate of a polysaccharide selected from the group consisting of guar gum, tamarind gum, and locust bean gum, (B) a C12-C18 higher fatty acid, (C) a neutralizer, and (D) water.

Description

Cleansing agent

The present invention relates to a cleaning agent. More specifically, it relates to a cleaning agent that has a small impact on the environment, exhibits excellent cleaning power, and also has excellent cleaning characteristics and a good feel when used.

Cleansers used for washing the face and other purposes often contain higher fatty acid soaps in view of their cleaning power and foaming properties. In particular, cleansers used in facial cleansers and other products are desired to produce fine bubbles, and higher fatty acids are preferably used to achieve this.

On the other hand, in order to improve the foam quality during use and the feeling during or after cleaning, the combination of various additives with higher fatty acid soaps has been studied. One such additive is a polymer containing an amino group or an ammonium group, such as an acrylamide polymer. Acrylamide polymers are useful for improving the foam quality and feeling of use of detergents, so various types have been studied and are commercially available.

However, synthetic polymer compounds such as acrylamide polymers are considered undesirable from the perspective of the burden they pose on the environment, which has been attracting attention in recent years. For this reason, cleaning products that do not contain acrylamide polymers are being considered, but many of these cleaning products leave room for improvement in terms of foam quality and usability.

JP 2006-347963 A

In view of the above problems, the present invention provides a cleanser that can provide excellent foam quality and ease of use without containing polymers that contain amino groups or ammonium groups, such as acrylamide-based polymers.

According to the present invention, the following inventions are provided.
[1]
(A1) a hydrolysate of a polysaccharide selected from the group consisting of guar gum, tamarind gum, and locust bean gum;
(B) a higher fatty acid having 12 to 18 carbon atoms,
(C) a neutralizing agent; and (D) water.
[2]
(A2) starch hydrolysate,
(B) a higher fatty acid having 12 to 18 carbon atoms,
(C) a neutralizing agent; and (D) water.
[3]
The cleansing agent according to [1], wherein the content of the component (A1) is 0.5 to 10 mass % based on the total mass of the cleansing agent.
[4]
The cleansing agent according to [2], wherein the content of the component (A2) is 1.5 to 15 mass% based on the total mass of the cleansing agent.
[5]
The cleansing agent according to [2] or [5], wherein the component (A2) is a hydrogenated starch hydrolysate.
[6]
The cleansing agent according to any one of [2], [4], and [5], wherein the weight-average molecular weight of component (A2) is 300 to 5,000.
[7]
The cleansing agent according to any one of [1] to [6], wherein the combined content of the components (B) and (C) is 2 to 60 mass% based on the total mass of the cleansing agent.
[8]
The cleansing agent according to any one of [1] to [7], wherein the component (C) is potassium hydroxide or sodium hydroxide.
[9]
The cleansing agent according to any one of [1] to [8], wherein the ratio of the total content of the components (B) and (C) to the content of the component (A1) or the component (A2), [B+C]/[A], is 3 to 70.
[10]
The cleansing agent according to any one of [1] to [9], further comprising (E) a polyhydric alcohol.
[11]
The cleansing agent according to [10], wherein the content of component (E) is 5 to 50 mass% based on the total mass of the cleansing agent.
[12]
The cleansing agent according to any one of [1] to [11], which is substantially free of a polymer containing an amino group or an ammonium group.
[13]
The cleansing agent according to any one of [1] to [12], which is a skin cleansing agent.
[14]
The cleansing agent according to any one of [1] to [13], which is in the form of a cream or gel.

The present invention provides a cleansing agent that has a low environmental impact and is excellent in foam quality and usability.

Description of the Invention

[Cleaning agent]
The first cleansing agent according to the present invention comprises:
(A1) a hydrolysate of a polysaccharide selected from the group consisting of guar gum, tamarind gum, and locust bean gum;
(B) a higher fatty acid having 12 to 18 carbon atoms,
(C) a neutralizing agent, and (D) water as essential components.

Also,
The second cleansing agent according to the present invention comprises:
(A2) starch hydrolysate,
(B) a higher fatty acid having 12 to 18 carbon atoms,
(C) a neutralizing agent, and (D) water as essential components.
Each of these components will be described below.

[(A) Polysaccharide hydrolysate]
The cleansing agent according to the present invention comprises a polysaccharide hydrolysate (hereinafter, sometimes referred to as component (A)). The first cleansing agent according to the present invention comprises (A1) a polysaccharide hydrolysate selected from the group consisting of guar gum, tamarind gum, and locust bean gum, and the second cleansing agent according to the present invention comprises a starch hydrolysate. It is known that polysaccharides are derived from plants, seaweed, microorganisms, etc. These polysaccharides and their hydrolysates have a thickening effect, and may also be used to adjust the viscosity of cleansing agents, etc. In the present invention, a polysaccharide selected from the group consisting of guar gum, tamarind gum, and locust bean gum, which are plant-derived polysaccharides, or a starch hydrolysate is used. By using the hydrolysates of these specific polysaccharides, excellent foam quality and usability can be achieved, and in particular, the hydrolysate of guar gum is preferable because it can achieve excellent effects.

Furthermore, if guar gum, tamarind gum, locust bean gum, or starch is used as is, i.e., without hydrolysis, the thickening effect tends to be too great. On the other hand, even if a relatively large amount of polysaccharide hydrolysates is added to a cleansing agent, the viscosity does not become excessively high, and it is possible to greatly improve usability, particularly the moist feeling of the skin after use.

　Polysaccharide hydrolysates can usually be obtained by hydrolyzing polysaccharides. There are no particular limitations on the hydrolysis method, and the hydrolysates can be obtained by any commonly known method. For example, hydrolysis can be performed with an acid or alkali, or with the aid of an enzyme. However, hydrolysis using an acid or alkali can sometimes lead to excessive decomposition. For this reason, enzymatic hydrolysis, which can yield an appropriate partial hydrolysis product, is preferred.

Also, as a starch hydrolysate, a sugar alcohol obtained by adding hydrogen to hydrolyzed starch can be used. Such sugar alcohols include sorbitol, maltitol, maltotriitol, maltotetraitol, and maltopentaitol.

The molecular weight of the polysaccharide hydrolysate can be selected as desired depending on the purpose. For example, the weight average molecular weight of the (A1) component is preferably 80,0000 or less, and more preferably 30,000 or less. For example, the weight average molecular weight of the (A2) component is preferably 300 to 5,000, and more preferably 500 to 2,000.

In the cleansing agent according to the present invention, the content of component (A) is not particularly limited. The content of component (A1) is preferably 0.5 to 10 mass% based on the total mass of the cleansing agent, and more preferably 1 to 8 mass%. The content of component A1) is preferably 1.5 to 15 mass% based on the total mass of the cleansing agent, and more preferably 2 to 10 mass%.

[(B) Higher fatty acid]
The cleansing agent according to the present invention comprises a higher fatty acid (hereinafter, sometimes referred to as component (B)). Component (B) that can be used in the present invention can be selected from higher fatty acids that are generally used as cleansing agent materials. In the present invention, the higher fatty acid is a fatty acid having 12 to 18 carbon atoms, and may be linear, branched, saturated, or unsaturated. In addition, either a monobasic acid or a polybasic acid may be used. However, it is preferable to use a monobasic acid, since salts of polybasic acids tend to be highly water-soluble but may have reduced cleansing power.

Specific examples of the (B) component that can be used include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, palmitoleic acid, oleic acid, isomyristic acid, isopalmitic acid, and isostearic acid, and combinations of two or more of these can also be used. For example, two or more of lauric acid, myristic acid, palmitic acid, and stearic acid can be used in combination, and it is also preferable to use all four of these higher fatty acids.

[(C) Neutralizing agent]
The cleansing agent according to the present invention contains a neutralizing agent (hereinafter, sometimes referred to as component (C)). Component (B) is neutralized by component (C) during the manufacturing process. Examples of the alkali used as component (C) include inorganic alkalis such as potassium hydroxide and sodium hydroxide, organic alkalis such as triethanolamine, and basic amino acids such as lysine and arginine. Of these alkalis, potassium hydroxide or sodium hydroxide is preferred, and potassium hydroxide is more preferred.

The detergent according to the present invention contains higher fatty acids and a neutralizing agent. As a result, the detergent contains salts of higher fatty acids. As salts of higher fatty acids formed by neutralization, it is preferable to use potassium laurate, potassium myristate, potassium palmitate, and potassium stearate, and it is also preferable to contain all four of these higher fatty acid salts.

In the cleansing agent according to the present invention, the higher fatty acids do not need to be completely neutralized. Rather, it is preferable that they are not completely neutralized, and that the product also contains unreacted higher fatty acids. Specifically, the neutralization rate of the higher fatty acids is preferably 60 to 90 mol %. In this case, 60 to 90 mol % of the higher fatty acids become higher fatty acid alkali salts, and the remaining 10 to 40 mol % exists as higher fatty acids. In particular, a neutralization rate of 75 to 80 mol % is preferable.

The cleaning agent according to the present invention includes a combination of a higher fatty acid and a neutralizing agent, but a combination of a salt of a higher fatty acid and a higher fatty acid can also be used. Furthermore, a saponified product of a higher fatty acid ester can be used in part or in whole in place of the higher fatty acid salt. In these cases, it is preferable that the ratio of the higher fatty acid group and alkali contained in the cleaning agent is within the above range.

In the cleansing agent according to the present invention, the above-mentioned components (B) and (C) constitute a higher fatty acid soap. In order to achieve an excellent cleaning effect, the combined content of components (B) and (C) is preferably 2 to 60% by mass, and more preferably 10 to 50% by mass, based on the total mass of the cleansing agent.

In order to achieve both sufficient cleansing properties and excellent foam quality and usability, it is preferable to adjust the ratio [B+C]/[A] of the total content of components (B) and (C) to the content of component (A1) or component (A2). In the cleansing agent of the present invention, the ratio [B+C]/[A] is preferably 3 to 70.

[(D) Water]
The cleansing agent according to the present invention further comprises water (hereinafter, sometimes referred to as component (D)) in addition to the above-mentioned components. As the water, water used in cleansing agents, quasi-drugs, etc. can be used, and for example, purified water, ion-exchanged water, tap water, etc. can be used.

[(E) Polyhydric alcohol]
The cleansing agent according to the present invention essentially contains the above-mentioned components (A) to (D), but may further contain a polyhydric alcohol (hereinafter, sometimes referred to as component (E)). Component (E) is generally capable of imparting a moisturizing effect to the cleansing agent. In the present invention, in addition to the moisturizing effect, the component (E) also exhibits an effect of improving the stability of the cleansing agent.

The polyhydric alcohol can be selected from those that can be generally used in cleansing agents.
Dihydric alcohols (for example, ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, octylene glycol, etc.);
Trihydric alcohols (e.g., glycerin, trimethylolpropane, etc.);
Tetrahydric alcohols (e.g., pentaerythritol, such as 1,2,6-hexanetriol, etc.);
Pentahydric alcohols (e.g., xylitol, etc.);
Hexahydric alcohols (e.g., sorbitol, mannitol, etc.); and polyhydric alcohol polymers (e.g., diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene glycol, polyglycerin, etc.).
In addition, polyhydric alcohol alkyl ethers, polyhydric alcohol ether esters, sugar alcohols, etc. can also be used. Among these, glycerin or dipropylene glycol is preferred. Furthermore, these polyhydric alcohols can be used in combination of two or more kinds.

The content of component (E) in the cleanser according to the present invention is not particularly limited, but is preferably 5 to 50% by mass, and more preferably 10 to 40% by mass, based on the total mass of the cleanser. By keeping the polyhydric alcohol within this range, the stability of the cleanser is improved and a high moisturizing effect can also be achieved.

[Other ingredients]
In addition to the above components, the cleaning agent according to the present invention may contain other optional components depending on the purpose, as long as the effect of the present invention is not impaired. Examples of such optional components include components that are generally blended into cleaning agents, such as drugs, surfactants, lubricating agents, gelling agents, antioxidants, UV absorbers, dyes, fragrances, and protein derivatives. Note that polymers containing amino groups or ammonium groups, such as acrylamide-based polymers, which have been used to improve the foam quality and usability of cleaning agents, are not small in environmental impact. Therefore, in order to reduce the environmental impact, it is preferable that the cleaning agent according to the present invention does not substantially contain acrylamide-based polymers, and it is particularly preferable that the content is zero.

Medications that can be added include those commonly used in cleaning products, such as vitamin C, vitamin E, amino acids, herbal medicines, anti-inflammatory agents, and disinfectants.

Any surfactant that is generally used in cleansing agents can be used, such as anionic surfactants, nonionic surfactants, cationic surfactants, amphoteric surfactants, etc.

The form of use of the cleansing agent according to the present invention is not particularly limited, but it has an excellent feel when applied to human skin and is highly effective at cleaning the skin, making it particularly suitable as a human skin cleansing agent. The formulation is also not limited, but it is preferably in a cream or gel form, and is preferably foamed before use. A facial cleanser form is typically preferred. However, the cleansing agent according to the present invention is not limited to such formulations or forms of use, and any other formulation such as a solution or emulsion may be used, and it may also be used in forms such as hair shampoo, rinse-in shampoo, body soap, etc.

The present invention will be specifically described based on the following examples, but the present invention is not limited to these examples. Contents are expressed as mass % of the total amount unless otherwise specified.

[Examples 1 to 14, Comparative Examples 1 to 3, and Reference Examples 1 to 2]
The cleansing agents of Examples 1 to 14, Comparative Examples 1 to 3, and Reference Examples 1 and 2 were prepared according to the formulations shown in Table 1.

[evaluation]
The cleansing agents of the examples were evaluated based on the following criteria. The evaluation results are shown in Tables 1 and 2.

[Foam quality]
The foam quality of each facial cleanser was evaluated by three expert panelists in a practical use test based on the following evaluation criteria.
A: Very good foam quality B: Good foam quality C: Poor foam quality

[Moisturizing feeling]
A practical use test was conducted in which three expert panelists evaluated the moist feeling after washing with each example of the facial cleanser, based on the following evaluation criteria.
A: Very moist feeling B: Moist feeling C: Not moist feeling

*1: Acrylamide polymer obtained from acrylic acid amide and dimethyldiallylammonium chloride. N/A: In Comparative Example 3, a uniform cleansing agent could not be obtained, and evaluation was not possible.

These results show that cleansers containing polysaccharide hydrolysates have a small environmental impact and are excellent in foam quality and usability. Examples 13 and 14 showed excellent foam quality and usability, but tended to be somewhat less stable as cleansers.

Claims

(A1) a hydrolysate of a polysaccharide selected from the group consisting of guar gum, tamarind gum, and locust bean gum;
(B) a higher fatty acid having 12 to 18 carbon atoms,
(C) a neutralizing agent; and (D) water.
(A2) starch hydrolysate,
(B) a higher fatty acid having 12 to 18 carbon atoms,
(C) a neutralizing agent; and (D) water.
The cleaning agent according to claim 1, wherein the content of component (A1) is 0.5 to 10 mass % based on the total mass of the cleaning agent.
The cleaning agent according to claim 2, wherein the content of component (A2) is 1.5 to 15 mass % based on the total mass of the cleaning agent.
The cleansing agent according to claim 2 or 4, in which component (A2) is a hydrogenated starch hydrolysate.
The cleansing agent according to claim 2 or 4, in which the weight average molecular weight of component (A2) is 300 to 5,000.
The cleaning agent according to claim 1 or 2, in which the combined content of components (B) and (C) is 2 to 60% by mass based on the total mass of the cleaning agent.
The cleaning agent according to claim 1 or 2, wherein component (C) is potassium hydroxide or sodium hydroxide.
The cleansing agent according to claim 1 or 2, in which the ratio [B+C]/[A] of the total content of components (B) and (C) to the content of component (A1) or component (A2) is 3 to 70.
The cleansing agent according to claim 1 or 2, further comprising (E) a polyhydric alcohol.
The cleaning agent according to claim 10, wherein the content of component (E) is 5 to 50 mass % based on the total mass of the cleaning agent.
The cleaning agent according to claim 1 or 2, which is substantially free of polymers containing amino groups or ammonium groups.
The cleansing agent according to claim 1 or 2, which is a skin cleansing agent.
The cleanser according to claim 1 or 2, which is in the form of a cream or gel.