JP2025033700A - Cleaning agents - Google Patents

Abstract

[Problem] The present invention aims to provide a cleaning agent that can impart an excellent thickening effect by adding a thickener for cleaning agents to a cleaning composition. [Solution] The above problem is solved by containing the following (A) and (B) as essential components. (A) Polyglycerol fatty acid ester in which the number of carbon atoms in the fatty acid is 12 to 14 and the average degree of polymerization of polyglycerol is 3 to 6 (B) Propylene glycol monolaurate [Selected Figure] None

Description

The present invention relates to a cleaning agent containing a cleaning agent thickener that can impart an excellent thickening effect.

Cleaning agents in general, such as shampoos, body shampoos, facial cleansers, hand soaps, and liquid kitchen detergents, generally contain thickeners to improve performance and ease of handling. Patent Document 1 reports that when anionic surfactants such as alkyl sulfates and alkyl sulfonates are used as the main cleaning ingredients, the addition of a specific propylene glycol monolaurate ester exhibits a thickening effect.

On the other hand, in recent years, acylamino acid surfactants are often used to reduce irritation, and it is known that it is difficult to build up viscosity with cleaning agents containing these surfactants. Patent Document 2 reports that it is possible to impart a suitable degree of thickening by blending an amphiphilic substance, an inorganic salt, and water in a specific ratio with an N-long chain acyl acidic amino acid and/or its salt. However, sufficient viscosity cannot be obtained by the above technology alone, and in actual formulations, other thickeners such as cocamide DEA are also used in combination, leaving issues to be addressed.

Special Publication No. 6-31409 Patent No. 3922299

The object of the present invention is to provide a cleaning agent that can impart an excellent thickening effect, even in a cleaning agent that has an acylamino acid surfactant as the main cleaning ingredient, in view of the problems of the conventional technology described above.

As a result of intensive research, the inventors discovered that a superior thickening effect can be imparted by combining (A) a polyglycerol fatty acid ester in which the fatty acid has 12 to 14 carbon atoms and the average degree of polymerization of the polyglycerol is 3 to 6 with (B) a propylene glycol monolaurate, and thus completed the present invention.

By using a thickener for detergents, the present invention can impart sufficient viscosity even when an acylamino acid-based surfactant, which tends to have a low viscosity, is used as the main detergent component, thereby providing a detergent with good performance and ease of handling.

Hereinafter, the embodiments of the present invention will be described in more detail.
The polyglycerol fatty acid ester (A) used in the present invention is characterized by having an alkyl group having 12 to 14 carbon atoms and an average degree of polymerization of polyglycerol of 3 to 6.

(A) according to the present invention is not particularly limited, but examples thereof include triglyceryl laurate, tetraglyceryl laurate, hexaglyceryl laurate, triglyceryl myristate, tetraglyceryl myristate, and hexaglyceryl myristate. Commercially available products include "NIKKOL Triglyn 1-L" (manufactured by Nikko Chemicals Co., Ltd.), "NIKKOL Hexaglyn 1-L" (manufactured by Nikko Chemicals Co., Ltd.), and "NIKKOL Hexaglyn 1-M" (manufactured by Nikko Chemicals Co., Ltd.).

The (B) according to the present invention is not particularly limited, and examples of commercially available products include "Type BP" (manufactured by Riken Vitamin Co., Ltd.) and "Unisafe PGML" (manufactured by NOF Corp.).

The amount of polyglycerol fatty acid ester (A) used in the present invention is 0.1 to 10% by mass, more preferably 0.1 to 5% by mass, and even more preferably 0.5 to 3% by mass, based on the total amount of the cleaning agent.

The amount of (B) propylene glycol monolaurate used in the present invention is 0.1 to 5 mass % of the total amount of the cleaning agent, and more preferably 0.5 to 3 mass %.

The cleaning agent in the present invention is not particularly limited, and examples thereof include products such as hair shampoo, body shampoo, facial cleanser, cleansing agent, hand soap, and liquid kitchen detergent, regardless of whether they are aqueous or emulsion-based.

The present invention will be described in more detail below with reference to examples of the present invention, but the present invention is not limited thereto. In the following examples, the amounts of ingredients are expressed in mass % unless otherwise specified.

The product of the present invention was used to evaluate its thickening performance in a detergent.
1. Preparation method The cleaning agent components shown in Tables 1 and 2 were measured out and mixed uniformly to prepare the reference product, invention products 1 to 9, and comparison products 1 to 5.
2. Evaluation of thickening performance The viscosity was measured at 25° C. using a Brookfield viscometer, with rotor No. 3 and rotating at 30 rpm for 30 seconds.
The evaluation results of the thickening performance shown in Tables 1 and 2 are the change in viscosity compared to the viscosity of the standard product, and are expressed as follows according to the degree of thickening.
<Description of thickening performance>
-: No decrease or change in viscosity was observed compared to the reference product.
+: Increased viscosity (up to 200 mPa·s) was observed compared to the standard product.
++: Viscosity has increased significantly compared to the standard product (200-1000mPa・s).
+++: Viscosity significantly increased compared to the standard product (1000 mPa·s or more).

Below are examples containing a thickener for detergents. All of Examples 1 to 4 showed superior thickening effects compared to cases in which the product of the present invention did not contain the component corresponding to (A) polyglycerol fatty acid ester.

Example 1: Shampoo Sodium methyl cocoyl taurate 4.50 (mass%)
Sodium lauroyl methylalanine 1.50
Cocamidopropyl betaine 4.50
Lauryl betaine 1.75
Polyquaternium-10 0.40
(Caprylyl/Capryl) Glucoside 0.52
Glycerin 1.00
1,3-butylene glycol 1.00
Propylene glycol laurate 2.00
Triglyceride laurate 2.00
Citric acid Appropriate amount Sodium citrate Appropriate amount Preservative Appropriate amount Purified water Remainder Total amount 100.00
(Preparation method) All ingredients are mixed uniformly.
(Results) The viscosity of Example 1 was measured in the same manner as in the Examples, and showed a viscosity of 4000 mPa·s or more. When triglyceryl laurate was omitted from Example 1, the viscosity was 2900 mPa·s, confirming the thickening effect of the present invention.

Example 2: Hand soap Sodium lauroyl methylalanine 4.50 (mass%)
Cocamidopropyl betaine 4.50
(Caprylyl/Capryl) Glucoside 2.60
Glycerin 2.00
Propanediol 3.00
Propylene glycol laurate 1.50
Tetraglyceryl laurate 2.00
Citric acid Appropriate amount Sodium citrate Appropriate amount Preservative Appropriate amount Purified water Remainder Total amount 100.00
(Preparation method) All ingredients are mixed uniformly.
(Results) The viscosity of Example 2 was measured in the same manner as in Example 2, and was found to be 2700 mPa·s. When tetraglyceryl laurate was omitted from Example 2, the viscosity was found to be 735 mPa·s, confirming the thickening effect of the present invention.

Example 3: Body shampoo TEA-cocoyl glutamate 9.00 (mass%)
Sodium trideceth-4 carboxylate 5.00
Sodium cocoamphoacetate 4.00
1,3-butylene glycol 5.00
Propylene glycol laurate 2.00
Triglyceride myristate 0.80
EDTA-2Na Appropriate amount Preservative Appropriate amount Purified water Remainder Total amount 100.00
(Preparation method) All ingredients are mixed uniformly.
(Results) The viscosity of Example 3 was measured in the same manner as in the Examples, and showed a viscosity of 4000 mPa·s or more. When triglyceryl myristate was omitted from Example 3, the viscosity was 3100 mPa·s, confirming the thickening effect of the present invention.

Example 4: Shampoo Sodium laureth sulfate 5.40 (mass%)
TEA lauryl sulfate 4.20
Sodium lauroamphoacetate 2.90
Polyquaternium-10 0.30
1,3-butylene glycol 3.00
Propylene glycol laurate 1.00
Hexaglyceryl myristate 1.00
EDTA-2Na Appropriate amount Sodium benzoate Appropriate amount Citric acid Appropriate amount Preservative Appropriate amount Purified water Remainder Total amount 100.00
(Preparation method) All ingredients are mixed uniformly.
(Results) The viscosity of Example 4 was measured in the same manner as in the Examples, and it showed a viscosity of 3000 mPa·s. When hexaglyceryl myristate was omitted from Example 4, the viscosity was 1230 mPa·s, confirming the thickening effect of the present invention.

The present invention provides a detergent thickener that exhibits excellent thickening properties by adding it to a low-viscosity detergent, thereby providing a detergent with good performance and ease of handling.

Claims (1)

A cleaning agent comprising the following components (A) and (B) as a thickener for the cleaning agent:
Component (A) Polyglycerol fatty acid ester in which the fatty acid has 12 to 14 carbon atoms and the average polymerization degree of polyglycerol is 3 to 6. Component (B) Propylene glycol monolaurate.