Mild cleansing compositions containing alkyl ether carboxylic acid surfactants and their use in wash-off products

Abstract

The present application relates to a mild cleaning composition containing alkyl ether carboxylic acid surfactant and its application in wash products, belonging to the cosmetic technical field. The mild cleaning composition provided by the present application comprises the following raw materials: composite alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizinate, polysaccharide of tuberose, southern cuscuta extract, wherein the composite alkyl ether carboxylic acid is obtained by blending lauryl polyether-4 carboxylic acid, lauryl polyether-6 carboxylic acid and lauryl polyether-11 carboxylic acid. The composition of the present application can realize comprehensive care of the skin while completing mild cleaning through the synergistic effect of each raw material, and can be used for preparing high-content oil bath oil, dense high-foam soap-based shower gel and fluffy and soft silicone-free shampoo.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology and relates to a mild cleansing composition containing alkyl ether carboxylic acid surfactants and its application in bath and body products. Background Technology

[0002] Surfactants are a core component of bath and body products, directly determining their cleaning power, foaming properties, and skin feel. Currently, mainstream bath and body products on the market, such as shower gels and shampoos, primarily use surfactant systems classified into sulfate-based, soap-based, amino acid-based, and alkyl ether carboxylic acid-based systems. Each of these systems has its own advantages, but some also have drawbacks that are difficult to balance. For example, the excessive degreasing properties of sulfate-based surfactants can damage the skin barrier, leading to dryness, tightness, and itching with long-term use, especially unfriendly to sensitive or dry skin. Soap-based surfactants are highly alkaline, incompatible with the skin's slightly acidic environment, and long-term use can disrupt the skin's microecological balance, causing dryness and irritation. Amino acid-based surfactants are expensive and have poor compatibility with high-oil content systems, making them difficult to use in products requiring strong emulsification capabilities, such as bath oils. The EO chain and carboxylate in the structure of alkyl ether carboxylic acid surfactants endow them with characteristics of both anionic and nonionic surfactants. Therefore, they can be used under a wide range of pH conditions, exhibiting excellent detergency, emulsification, dispersibility, and calcium soap dispersing power; good foaming power and foam stability; resistance to acids and alkalis, salts, high divalent ions, high temperatures, and oxidation; good compatibility with various surfactants; and within a certain concentration range, compounding with cationic surfactants can effectively reduce their CMC concentration; good solubilizing and emulsifying properties; and good biodegradability. Therefore, developing products with gentle cleansing and comprehensive skincare benefits using alkyl ether carboxylic acid surfactants is one of the core challenges in the daily chemical industry. To address this challenge, companies are tackling it through multi-dimensional innovation. Summary of the Invention

[0003] The purpose of this invention is to provide a mild cleansing composition containing alkyl ether carboxylic acid surfactants and its application in bath and body products. By compounding the compound alkyl ether carboxylic acid with PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract, the raw materials synergistically enhance each other, achieving comprehensive skin care while providing mild cleansing. It can be used to prepare high-oil-content bath oils, rich and foamy soap-based bath gels, and fluffy and smooth silicone-free shampoos.

[0004] The objective of this invention can be achieved through the following technical solutions: In a first aspect, the present invention provides a mild cleaning composition containing an alkyl ether carboxylic acid surfactant, the mild cleaning composition comprising the following raw materials: a complex alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract, wherein the weight ratio of the complex alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract is (8.6-11):(2-4):(0.5-1.5):(1-3):(1-3), and the complex alkyl ether carboxylic acid is obtained by blending lauryl polyether-4 carboxylic acid, lauryl polyether-6 carboxylic acid, and lauryl polyether-11 carboxylic acid.

[0005] The complex alkyl ether carboxylic acid is obtained by blending lauryl ether-4 carboxylic acid, lauryl ether-6 carboxylic acid, and lauryl ether-11 carboxylic acid in a specific ratio. These three surfactants have different EO chain lengths. Among them, lauryl ether-4 carboxylic acid exhibits the strongest lipophilicity, enabling rapid insertion into the oil-water interface and providing rapid foaming ability and a synergistic thickening effect. Lauryl ether-6 carboxylic acid has a relatively moderate hydrophilic-lipophilic balance, balancing detergency and stabilizing foam. Lauryl ether-11 carboxylic acid provides strong hydrophilicity and emulsifying and solubilizing capabilities. Through the gradient distribution of EO chain lengths, a transition from oil-phase cleaning to aqueous-phase emulsification is achieved, synergistically exerting excellent detergency, emulsification, dispersion, wetting, and solubilizing functions. It also exhibits strong foaming power, easy rinsing, excellent detergency, and low skin irritation. Furthermore, it helps other functional ingredients to disperse better in the system, effectively improving product texture, stabilizing the formula, and enhancing skin feel.

[0006] PPG-3 octyl ether possesses excellent emollient and solubilizing properties, reducing excessive degreasing of skin lipids by complex alkyl ether carboxylic acids, improving the skin feel after cleansing, and reducing tightness and dryness. Secondly, PPG-3 octyl ether can intercalate into surfactant micelles, regulating micelle aggregation and microstructure, thereby optimizing the fineness and stability of the foam, making it denser and easier to rinse. Furthermore, it can also act as a solubilizer for active ingredients, helping to uniformly disperse active ingredients such as dipotassium glycyrrhizate and tuberose polysaccharides in the system and promoting their transdermal absorption during the cleansing process.

[0007] Dipotassium glycyrrhizate has an amphiphilic structure, allowing it to adsorb onto the surface of aqueous solutions. By inserting its lipophilic portion into the oil phase and dissolving its hydrophilic portion in the aqueous phase, it reduces the surface tension between water molecules, thus exhibiting foaming and emulsifying properties. Furthermore, dipotassium glycyrrhizate possesses significant anti-inflammatory, soothing, and anti-allergic effects. In the composition of this formulation, dipotassium glycyrrhizate can neutralize mild irritation that surfactants may cause, making it suitable for sensitive skin or individuals with damaged skin barriers, while also providing soothing protection for the scalp and skin.

[0008] Tuberose polysaccharides are polysaccharides obtained from tuberose petals through callus culture. Their chemical structure consists of a main chain of alternating mannose and glucuronic acid, with side chains linked by arabinose and galactose. These acidic complex polysaccharides, with a molecular weight of 10,000-20,000,000, are readily soluble in water and can form a flexible, reticulated film unaffected by temperature changes. In solution, these polysaccharides increase the viscosity of the system, thus slowing down liquid flow around bubbles and helping to maintain foam stability. Furthermore, tuberose polysaccharides possess excellent film-forming and moisturizing properties, forming a breathable protective film on the skin or scalp, reducing moisture loss during cleansing, and physically blocking external irritants.

[0009] The polysaccharide molecules in *Cuscuta chinensis* extract can form a network structure in solution, increasing intermolecular forces and thus affecting the viscosity of the system, consequently influencing its overall foaming, lathering, and cleaning properties. Furthermore, *Cuscuta chinensis* extract also contains flavonoids, phenolic acids, and other active ingredients, exhibiting excellent anti-inflammatory, antibacterial, and antioxidant effects. These components effectively assist surfactants in skin cleansing, effectively scavenging free radicals and inhibiting lipid peroxidation. In addition, *Cuscuta chinensis* extract can also be used as a skin conditioning agent and skin protectant, resisting potential environmental irritation and damage to the skin, reducing the potential skin irritation caused by surfactants used in this treatment, while providing additional nourishment and effectively improving skin condition.

[0010] Preferably, the weight ratio of the composite alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract is (9.2-10.4):(2.5-3.5):(0.8-1.2):(1.5-2.5):(1.5-2.5).

[0011] Preferably, the weight ratio of lauryl ether-4 carboxylic acid, lauryl ether-6 carboxylic acid, and lauryl ether-11 carboxylic acid in the composite alkyl ether carboxylic acid is (5-7):(2-4):(0.4-1.2).

[0012] In a second aspect, the present invention provides a method for preparing a mild cleaning composition containing alkyl ether carboxylic acid surfactants as described in the first aspect, comprising the following steps: Laureth-4 carboxylic acid, lauryl ether-6 carboxylic acid, and lauryl ether-11 carboxylic acid were mixed in a weight ratio and stirred evenly to obtain a composite alkyl ether carboxylic acid. The compound alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract were mixed in a weight ratio and stirred evenly to obtain a mild cleaning composition containing alkyl ether carboxylic acid surfactants.

[0013] Preferably, the mild cleansing composition can be used to prepare high-oil-content bath oils, rich-foaming soap-based shower gels, and fluffy, smooth, silicone-free shampoos.

[0014] Thirdly, the present invention provides a high-oil-content bath oil, wherein the raw materials of the high-oil-content bath oil include the mild cleaning composition of the alkyl ether carboxylic acid surfactant described in the first aspect, and the addition amount of the mild cleaning composition in the high-oil-content bath oil is 10wt%-15wt%.

[0015] Fourthly, the present invention provides a rich, high-foaming soap-based shower gel, wherein the raw materials of the rich, high-foaming soap-based shower gel include the mild cleaning composition containing alkyl ether carboxylic acid surfactants as described in the first aspect, and the amount of the mild cleaning composition added to the rich, high-foaming soap-based shower gel is 0.2wt%-5wt%.

[0016] Fifthly, the present invention provides a volumizing and smoothing silicone-free shampoo, wherein the raw materials of the volumizing and smoothing silicone-free shampoo include the mild cleaning composition containing alkyl ether carboxylic acid surfactants as described in the first aspect, and the amount of the mild cleaning composition added to the volumizing and smoothing silicone-free shampoo is 0.5wt%-5wt%.

[0017] The beneficial effects of this invention are: (1) This invention scientifically blends three alkyl ether carboxylic acids with different EO chain lengths—lauryl polyether-4 carboxylic acid, lauryl polyether-6 carboxylic acid, and lauryl polyether-11 carboxylic acid—to construct a chain-like synergistic mechanism of "rapid foaming-stable foam holding-solubilization and emulsification." Among them, lauryl polyether-4 carboxylic acid has the strongest lipophilicity and can quickly insert into the oil-water interface, providing rapid foaming and thickening effects; lauryl polyether-6 carboxylic acid has a moderate balance of hydrophilicity and lipophilicity, balancing detergency and stabilizing foam; and lauryl polyether-11 carboxylic acid has the strongest hydrophilicity, providing strong emulsification and solubilization capabilities. The three surfactants achieve a complete transition from oil-phase cleaning to water-phase emulsification through the gradient distribution of EO chain lengths, synergistically exerting good functions such as washing, emulsification, dispersion, wetting, and solubilization. They have strong foaming power, dense foam, are easy to rinse, have excellent detergency, and have extremely low skin irritation, effectively improving product texture, stabilizing the formula, and enhancing skin feel.

[0018] (2) In this invention, a compound alkyl ether carboxylic acid is combined with PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract. PPG-3 octyl ether reduces the excessive degreasing of skin lipids by the compound alkyl ether carboxylic acid, improving the skin feel after cleansing, reducing tightness and dryness. It also acts as a solubilizer for the active ingredients, helping dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract to disperse evenly in the system, promoting transdermal absorption during cleansing and avoiding the irritation risk associated with adding additional chemical penetration enhancers. Dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract indirectly affect the foaming, emulsifying, and cleansing properties of the system, thus influencing the overall performance of the composition. Furthermore, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract can also provide additional nourishment to the skin, improving its condition. The components work synergistically to achieve comprehensive skin care while providing gentle cleansing. It can be used to prepare high-oil-content bath oils, rich and foamy soap-based bath gels, and fluffy and smooth silicone-free shampoos.

[0019] (3) The mild cleaning composition provided by the present invention is based on alkyl ether carboxylic acid surfactants and compounded with natural plant active ingredients. The overall formula is mild, low in irritation, and has good biodegradability. It does not contain traditional irritating cleaning ingredients such as sulfates and soap bases, which are in line with the industry trend of green environmental protection and sustainable development and have good market application prospects. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with embodiments, is provided below.

[0021] Lauryl ether-4 carboxylic acid (trade name AKYPO RLM 25), lauryl ether-6 carboxylic acid (trade name KAOAKYPO RLM 45CA), lauryl ether-11 carboxylic acid (trade name AKYPO RLM 100), PPG-3 octyl ether (trade name KAO SOFCARE GP-1), and tuberose polysaccharide (trade name KAO SOFCARE TP-SB-B) were all purchased from Kao Corporation. Dipotassium glycyrrhizate was purchased from Gansu Fanzhi Pharmaceutical Co., Ltd. The extract of Cuscuta chinensis from southern China was purchased from Guangzhou Yousewei Biochemical Technology Co., Ltd.

[0022] Unless otherwise specified, all other materials, reagents, etc. used in all embodiments and comparative examples of this invention are commercially available.

[0023] The preparation methods of mild cleaning compositions containing alkyl ether carboxylic acid surfactants in Examples 1-5 and Comparative Examples 1-11 include the following steps: The alkyl ether carboxylic acids were mixed in a weight ratio and stirred until homogeneous to obtain a composite alkyl ether carboxylic acid. The composite alkyl ether carboxylic acid is mixed with the remaining raw materials in a certain weight ratio and stirred evenly to obtain a mild cleaning composition containing alkyl ether carboxylic acid surfactants.

[0024] Example 1 The weight ratio of the compound alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract in the mild cleaning composition is 9.8:3:1:2:2; the weight ratio of lauryl ether-4 carboxylic acid, lauryl ether-6 carboxylic acid, and lauryl ether-11 carboxylic acid in the compound alkyl ether carboxylic acid is 6:3:0.8.

[0025] Example 2 The weight ratio of the compound alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract in the mild cleaning composition is 9.2:2.5:0.8:1.5:1.5; the weight ratio of lauryl ether-4 carboxylic acid, lauryl ether-6 carboxylic acid, and lauryl ether-11 carboxylic acid in the compound alkyl ether carboxylic acid is 6:3:0.8.

[0026] Example 3 The weight ratio of the compound alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract in the mild cleaning composition is 10.4:3.5:1.2:2.5:2.5; the weight ratio of lauryl ether-4 carboxylic acid, lauryl ether-6 carboxylic acid, and lauryl ether-11 carboxylic acid in the compound alkyl ether carboxylic acid is 6:3:0.8.

[0027] Example 4 The weight ratio of the compound alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract in the mild cleaning composition is 8.6:2:0.5:1:1; the weight ratio of lauryl ether-4 carboxylic acid, lauryl ether-6 carboxylic acid, and lauryl ether-11 carboxylic acid in the compound alkyl ether carboxylic acid is 5:2:0.4.

[0028] Example 5 The weight ratio of the compound alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract in the mild cleaning composition is 11:4:1.5:3:3; the weight ratio of lauryl ether-4 carboxylic acid, lauryl ether-6 carboxylic acid, and lauryl ether-11 carboxylic acid in the compound alkyl ether carboxylic acid is 7:4:1.2.

[0029] Comparative Example 1 Compared with Example 1, the difference is that PPG-3 octyl ether was omitted in Comparative Example 1, and the missing amount was made up with dipotassium glycyrrhizate, tuberose polysaccharide and Cuscuta chinensis extract in a weight ratio of 1:2:2. The other components and their weight ratios are the same as in Example 1.

[0030] Comparative Example 2 Compared with Example 1, the difference is that dipotassium glycyrrhizate was omitted in Comparative Example 2, and the missing amount was made up with PPG-3 octyl ether, tuberose polysaccharide and Cuscuta chinensis extract in a weight ratio of 3:2:2. The other components and their weight ratios are the same as in Example 1.

[0031] Comparative Example 3 Compared with Example 1, the difference is that tuberose polysaccharide was omitted in Comparative Example 3, and the missing amount was made up with PPG-3 octyl ether, dipotassium glycyrrhizate and Cuscuta chinensis extract in a weight ratio of 3:1:2. The other components and their weight ratios are the same as in Example 1.

[0032] Comparative Example 4 Compared with Example 1, the difference is that the extract of Cuscuta chinensis in Comparative Example 4 was omitted, and the missing amount was made up with PPG-3 octyl ether, dipotassium glycyrrhizate and tuberose polysaccharide in a weight ratio of 3:1:2. The other components and their weight ratios were the same as those in Example 1.

[0033] Comparative Example 5 Compared with Example 1, the difference is that the weight ratio of compound alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract in the mild cleaning composition of Comparative Example 5 is 9.8:5:2:0.5:0.5, while the other components and their weight ratios are consistent with those in Example 1.

[0034] Comparative Example 6 Compared with Example 1, the difference is that the weight ratio of compound alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract in the mild cleaning composition of Comparative Example 6 is 9.8:0.8:0.2:3.5:3.5, while the other components and their weight ratios are consistent with those in Example 1.

[0035] Comparative Example 7 Compared with Example 1, the difference is that Comparative Example 7 omits lauryl ether-4 carboxylic acid in the composite alkyl ether carboxylic acid, and the missing amount is made up with lauryl ether-6 carboxylic acid and lauryl ether-11 carboxylic acid in a weight ratio of 3:0.8. The other components and their weight ratios are the same as in Example 1.

[0036] Comparative Example 8 Compared with Example 1, the difference is that Comparative Example 8 omits lauryl ether-6 carboxylic acid in the composite alkyl ether carboxylic acid, and the missing amount is made up with lauryl ether-4 carboxylic acid and lauryl ether-11 carboxylic acid in a weight ratio of 6:0.8. The other components and their weight ratios are the same as in Example 1.

[0037] Comparative Example 9 Compared with Example 1, the difference is that Comparative Example 9 omits lauryl ether-11 carboxylic acid in the composite alkyl ether carboxylic acid, and the missing amount is made up with lauryl ether-4 carboxylic acid and lauryl ether-6 carboxylic acid in a weight ratio of 6:3. The other components and their weight ratios are consistent with those in Example 1.

[0038] Comparative Example 10 Compared with Example 1, the difference is that the composite alkyl ether carboxylic acid of Comparative Example 10 was obtained by blending lauryl polyether-4 carboxylic acid, lauryl polyether-6 carboxylic acid, and lauryl polyether-11 carboxylic acid in a weight ratio of 3:0.8:6, while the other components and their weight ratios remained the same as in Example 1.

[0039] Comparative Example 11 Compared with Example 1, the difference is that the composite alkyl ether carboxylic acid of Comparative Example 11 was obtained by blending lauryl polyether-4 carboxylic acid, lauryl polyether-6 carboxylic acid, and lauryl polyether-11 carboxylic acid in a weight ratio of 0.8:6:3, while the other components and their weight ratios remained the same as in Example 1.

[0040] Application Example 1: A high-oil-content bath oil The mild cleaning compositions containing alkyl ether carboxylic acid surfactants of Examples 1-5 and Comparative Examples 1-11 were added to bath oils at a concentration of 12 wt% to obtain bath oils of Application Examples 1-5 and Comparative Application Examples 1-11, respectively. In addition, a blank application example 1 was prepared by preparing a bath oil without adding the mild cleaning composition. The formulation of the bath oils is shown in Table 1.

[0041] Table 1 Serial Number Raw material composition Application Example 1-5, Comparative Application Example 1-11 (mass fraction, %) Blank application example 1 (quality fraction, %) 1 60wt% KOH aqueous solution 1.5 1.5 2 dipropylene glycol 4 4 3 glycerin 2 2 4 Mild cleaning compositions containing alkyl ether carboxylic acid surfactants 12 0 5 EMULGEN 104P Laureth-4 To 100 To 100 6 Potassium cocoyl glycinate (powder) 3.5 3.5 7 AMINON C-11S Cocamide Methyl MEA 6 6 8 Sunflower seed oil 40 40 9 Caprylic / Capric Triglycerides 6 6 10 Tocopherol 0.2 0.2 11 Phenoxyethanol 0.3 0.3 12 (Daily Use) Fragrance 1.5 1.5 13 50% citric acid solution Appropriate amount Appropriate amount The preparation methods of bath oil described in Application Examples 1-5 and Comparative Application Examples 1-11 include the following steps: S1. First, add the ingredients numbered 1-3 to the emulsifying pot, heat to 32°C, turn on the stirring, and stir at 30 rpm for 15 minutes. S2. Then add component number 4 and stir at 50 rpm at 32°C until the mixture is completely transparent and homogeneous. S3. Next, add the ingredients numbered 5-7 and stir at 80 rpm for 20 minutes at 32°C. S4. Finally, add components numbered 8-12 and stir at 100 rpm at 32°C until a clear and homogeneous liquid is obtained. Then add component number 13 to adjust the pH to 7.00 and discharge the product.

[0042] The preparation method of the bath oil described in Blank Application Example 1 includes the following steps: S1. First, add the ingredients numbered 1-3 to the emulsifying pot, heat to 32°C, turn on the stirring, and stir at 30 rpm for 15 minutes. S2. Next, add the ingredients numbered 5-7 and stir at 80 rpm for 20 minutes at 32°C. S3. Finally, add components numbered 8-12, stir at 100 rpm for 15 minutes at 32℃, then add component number 13 to adjust the pH to 7.00, and discharge.

[0043] (1) Stability test The high-content oil bath oil prepared with reference to GB / T 34857 standard corresponding to use cases 1-5, comparative application examples 1-11, and blank application example 1 was used as a sample. The samples were placed in environments of room temperature, -5℃, 5℃, and 40℃ for three months, and under light for one month to observe the changes in appearance, odor, and color. The results are recorded in Table 2 below.

[0044] Table 2 Group room temperature -5℃ 5℃ 40℃ illumination Blank application example 1 The upper layer is yellow, the lower layer is milky white, with a slight odor, and the layers are completely separated. The top layer is white, the bottom layer is yellow, and there is a slight odor. After restoration, the layers separate. The upper layer is yellow oil droplets, the lower layer is milky white, with a slight odor; it is completely separated. Brownish-yellow color, strong odor, severely spoiled and separated. Yellowish-brown, with a distinct odor, completely layered and uneven in color. Application Example 1 Pale yellow, odorless, and without separation. Pale yellow, odorless, solidified, and does not separate after reconstitution. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Application Example 2 Pale yellow, odorless, and without separation. Pale yellow, odorless, solidified, and does not separate after reconstitution. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Application Example 3 Pale yellow, odorless, and without separation. Pale yellow, odorless, solidified, and does not separate after reconstitution. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Application Example 4 Pale yellow, odorless, and without separation. Pale yellow, odorless, solidified, and does not separate after reconstitution. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Application Example 5 Pale yellow, odorless, and without separation. Pale yellow, odorless, solidified, and does not separate after reconstitution. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Comparative Application Example 1 Pale yellow, odorless, slightly separated Pale yellow, odorless, and does not separate after restoration. Pale yellow, odorless, slightly separated Pale yellow, slight odor, slight layering Pale yellow, odorless, slightly separated Comparative Application Example 2 Pale yellow, odorless, and without separation. Pale yellow, odorless, and does not separate after restoration. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Comparative Application Example 3 Pale yellow, odorless, and without separation. Pale yellow, odorless, and does not separate after restoration. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Comparative Application Example 4 Pale yellow, odorless, and without separation. Pale yellow, odorless, and does not separate after restoration. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Comparative Application Example 5 Pale yellow, odorless, and without separation. Pale yellow, odorless, and does not separate after restoration. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Pale yellow, odorless, and without separation. Comparative Application Example 6 Milky white, odorless, slightly separated Pale yellow, odorless, slightly separated after restoration Pale yellow, odorless, slightly separated Pale yellow, slight odor, clearly layered Pale yellow, slight odor, slight layering Comparative Application Example 7 Milky white, with a slight odor and distinct layering. The upper layer is pale yellow and solidified, while the lower layer is milky white. A slight odor indicates separation after recovery. Milky white, slight odor, completely separated Brownish-yellow color, strong odor, clearly layered Yellowish-brown, with a distinct odor and obvious layering. Comparative Application Example 8 Pale yellow, odorless, with distinct layers Pale yellow, odorless, separates into layers after restoration. Pale yellow, odorless, completely separated Dark yellow, slight odor, clearly layered Yellowish-brown, with a slight odor, and distinctly layered. Comparative Application Example 9 Pale yellow, odorless, slightly separated Pale yellow, odorless, separates into layers after restoration. Pale yellow, odorless, slightly separated Pale yellow, slight odor, clearly layered Pale yellow, odorless, slightly separated Comparative Application Example 10 Pale yellow, odorless, slightly separated Pale yellow, odorless, slightly separated after restoration Pale yellow, odorless, slightly separated Pale yellow, slight odor, clearly layered Pale yellow, odorless, slightly separated Comparative Application Example 11 Milky yellow, slight odor, distinctly layered The upper layer is milky white and solidified, while the lower layer is a pale yellow liquid with a slight odor. It separates into layers after restoration. Milky yellow, slight odor, distinctly layered Dark yellow, with a distinct odor and obvious layering. Yellowish-brown, with a distinct odor and obvious layering. As shown in Table 2, the high-oil-content bath oil containing a mild cleaning composition prepared in this invention did not exhibit stratification, odor change, or discoloration in Application Examples 1-5 after exposure to room temperature, -5℃, 5℃, 10℃, and light conditions, demonstrating good storage stability.

[0045] (2) Skin patch test Referring to the relevant requirements and testing methods of "Human Skin Patch Test" in the "Cosmetic Safety Technical Specifications (2015 Edition)," the high-oil content bath oils of this invention (Application Examples 1-5, Comparative Application Examples 1-11, and Blank Application Example 1) were tested. Skin reactions were observed at 0h, 24h, and 48h. All volunteers showed negative results, with no adverse skin reactions, indicating that the high-oil content bath oil prepared by this invention will not cause allergic reactions, is non-irritating, and has high safety.

[0046] (3) Foam performance test Experimental samples: High-oil-content bath oils prepared in Application Examples 1-5, Comparative Application Examples 1-11, and Blank Application Example 1; Experimental Method: The foaming ability of the sample was evaluated using a Roche foam analyzer. Specifically, the super-constant temperature water bath was first started and brought to 40℃, while the temperature of the tube jacket water bath was kept uniform. 2.5g of sample was weighed into a 1L volumetric flask, and 150ppm hard water was added (0.148g MgSO4·H2O and 0.0999g...). CaCl2 (diluted with distilled water to the mark), gently shake well, and heat to 40℃ for testing. Rinse the inner wall of the graduated tube with distilled water and then with the test solution. Close the stopcock of the graduated tube and inject 50mL of test solution using another dropper. Let it stand for 1 minute, and adjust the stopcock so that the liquid level is exactly at the 50mL mark. Fill the dropper with 200mL of test solution and place it on the prepared tube rack perpendicular to the cross-section of the graduated tube, so that the test solution flows to the center of the graduated tube. Open the stopcock of the dropper to let the test solution flow down. After the test solution has flowed out, start the stopwatch and record the height of the foam after 2 minutes. Perform three parallel tests for each group, and record the average test results as shown in Table 3 below.

[0047] Table 3 Group Foam height (mm) Blank application example 1 64 Application Example 1 158 Application Example 2 155 Application Example 3 156 Application Example 4 151 Application Example 5 154 Comparative Application Example 1 129 Comparative Application Example 2 131 Comparative Application Example 3 122 Comparative Application Example 4 126 Comparative Application Example 5 134 Comparative Application Example 6 115 Comparative Application Example 7 96 Comparative Application Example 8 103 Comparative Application Example 9 108 Comparative Application Example 10 112 Comparative Application Example 11 100 As shown in Table 3, the high-oil-content bath oil with mild cleaning composition prepared by the present invention has good foaming performance, foams quickly and produces a lot of foam.

[0048] (4) Evaluation of usage effect Test products: High-oil-content bath oil prepared in Application Example 1, Comparative Application Examples 1-11, and Blank Application Example 1; Testing Method: 130 volunteers aged 25-50 who reported dry skin problems were randomly divided into 10 groups of 3 people each. Each volunteer used the test product for 14 days, at least 3 times a week, using a shower method. Specifically, after wetting the body with warm water, an appropriate amount of shower oil was applied and rubbed all over the body, gently massaged, rinsed briefly, and then dried with a towel. During the test, no body care products that could affect the results were used. A quantitative questionnaire was used to provide feedback on the product's effectiveness. The questionnaire included information on skin condition (dryness, itching, and redness) before and 14 days after product use, and user experience (foaming speed, foam density, difficulty rinsing, and feeling of freshness) after 14 days of product use. The total score was 10 points, with 1 point being the worst for skin condition (severe dryness, itching, and redness after use) and 10 points being the best (significant improvement in dryness, itching, and redness after use). User experience was also rated as 1 point, which was the worst (slow foaming speed, poor foam density, difficult to rinse, and sticky, unrefreshing skin after washing) and 10 points being the best (fast foaming speed, dense foam, easy to rinse, and smooth, refreshed skin after washing). The average results are shown in Table 4 below.

[0049] Table 4 Group Skin condition score User experience rating Blank application example 1 2.3 1.9 Application Example 1 9.9 10.0 Comparative Application Example 1 6.4 7.9 Comparative Application Example 2 6.1 8.1 Comparative Application Example 3 5.7 7.5 Comparative Application Example 4 5.9 7.7 Comparative Application Example 5 7.3 8.2 Comparative Application Example 6 6.9 7.3 Comparative Application Example 7 6.9 6.4 Comparative Application Example 8 6.5 6.9 Comparative Application Example 9 6.3 7.1 Comparative Application Example 10 7.2 7.2 Comparative Application Example 11 7.0 6.7 As shown in Table 5, the high-oil-content bath oil containing a mild cleansing composition prepared in this invention has a good foaming speed, produces dense foam that is easy to rinse, and leaves the skin smooth and refreshed after use. It can effectively improve the problems of dry skin, itching, and redness.

[0050] Application Example 2: A dense, high-foaming soap-based shower gel The mild cleaning compositions containing alkyl ether carboxylic acid surfactants of Examples 1-5 and Comparative Examples 1-11 were added to the rich, high-foaming soap-based shower gels at a concentration of 3 wt%, respectively, to obtain the rich, high-foaming soap-based shower gels of Application Examples 6-10 and Comparative Application Examples 12-22. In addition, the rich, high-foaming soap-based shower gel without the addition of mild cleaning compositions was prepared as blank application example 2. The formulation of the rich, high-foaming soap-based shower gel is shown in Table 5.

[0051] Table 5

[0052] The preparation methods of the dense, high-foaming soap-based shower gels described in Application Examples 6-10 and Comparative Application Examples 12-22 include the following steps: S1. First, add components 1-3 to the emulsifying pot, mix and stir until the material is evenly dissolved, then turn on the heat to 80℃, pour in components 4-5, and stir at 80℃ until the material is evenly mixed. S2. Then add component number 6 (i.e., the dispersion obtained by mixing hydroxyethyl methyl cellulose and deionized water evenly), mix and stir until the material is evenly dissolved, then continue to add components number 7-11. After the material is completely dissolved, turn on the cold circulating water and stir to cool down to 48℃. S3. Finally, add components 12-14 and continue stirring until a uniform white pearlescent viscous liquid is obtained. Then add component 15 to adjust the pH to 9.00 and discharge the product.

[0053] The preparation method of the dense, high-foaming soap-based shower gel described in Blank Application Example 2 includes the following steps: S1. First, add components 1-3 to the emulsifying pot, mix and stir until the material is evenly dissolved, then turn on the heat to 80℃, pour in component 4, and stir at 80℃ until the material is evenly mixed. S2. Then add component number 6 (i.e., the aqueous dispersion obtained by premixing hydroxyethyl methyl cellulose and deionized water), mix and stir until the material is evenly dissolved, then continue to add components number 7-11. After the material is completely dissolved, turn on the cold circulating water and stir to cool down to 48°C. S3. Finally, add components 12-14 and continue stirring until a uniform white pearlescent viscous liquid is obtained. Then add component 15 to adjust the pH to 9.00 and discharge the product.

[0054] (1) Stability test Using the high-foaming soap-based shower gel prepared according to example 6-10 of GB / T 34857 as a sample, the sample was placed in environments of room temperature, -5℃, 5℃, and 40℃ for three months, and under light for one month to observe changes in appearance, odor, and color.

[0055] Experimental results show that the rich, high-foaming soap-based shower gel containing a mild cleaning composition prepared in this invention did not exhibit stratification, change of smell, or change of color after being placed at room temperature, -5℃, 5℃, 40℃, or under light conditions. It is a white, pearlescent, viscous liquid with good storage stability.

[0056] (2) Skin patch test Referring to the relevant requirements and testing methods of "Human Skin Patch Test" in the "Cosmetic Safety Technical Specifications (2015 Edition)" issued by the Ministry of Health, the dense, high-foaming soap-based shower gels of this invention (Application Examples 6-10, Comparative Application Examples 12-22, and Blank Application Example 2) were tested. Skin reactions were observed at 0h, 24h, and 48h. All volunteers showed negative results, with no adverse skin reactions. This indicates that the soap-based shower gel containing a mild cleansing composition of alkyl ether carboxylic acid surfactants prepared in this invention will not cause allergic reactions, is non-irritating, and has high safety.

[0057] (3) Moisturizing effect Test products: Dense, high-foaming soap-based shower gels prepared in Application Example 6, Comparative Application Examples 2-22, and Blank Application Example 2; Test method: 39 volunteers aged 25-50 who reported having dry skin problems were randomly divided into 13 groups of 3 people each. The volunteers used the test product to shower for 5 minutes in the same environment, dried themselves, and sat quietly.

[0058] The skin hydration level of volunteers was measured using an ASA-M100 stratum corneum hydration meter. A specific area on the back of each volunteer was selected as the experimental zone. The stratum corneum hydration level of all volunteers' experimental zones was controlled between 40-45% before using the test product and recorded. Then, the hydration level of this area was measured 8 hours after application using the ASA-M100 stratum corneum hydration meter. The improvement rate of stratum corneum hydration was calculated using the following formula: Skin stratum corneum moisture content improvement rate (%) = [(stratum corneum moisture content after use - stratum corneum moisture content before use) / stratum corneum moisture content before use] × 100%; The average experimental results are shown in Table 6 below.

[0059] Table 6 Group Improvement rate of skin stratum corneum moisture content / % Blank Application Example 2 2.0 Application Example 6 25.6 Comparative Application Example 12 15.2 Comparative Application Example 13 15.0 Comparative Application Example 14 14.1 Comparative Application Example 15 14.7 Comparative Application Example 16 15.9 Comparative Application Example 17 15.6 Comparative Application Example 18 16.3 Comparative Application Example 19 16.7 Comparative Application Example 20 15.8 Comparative Application Example 21 17.4 Comparative Application Example 22 17.8 As shown in Table 6, the rich, high-foaming soap-based shower gel containing a mild cleansing composition prepared in this invention can effectively improve skin hydration and has a good moisturizing effect after use.

[0060] (4) Evaluation of usage effect Test products: Dense, high-foaming soap-based shower gels prepared in Application Example 6, Comparative Application Examples 2-22, and Blank Application Example 2; Testing Method: 130 volunteers aged 25-50 who reported dry skin problems were randomly divided into 13 groups of 10 each. Each volunteer used the test product for 14 days, at least twice a week, using the shower gel. The specific method was to wet the body with warm water, apply an appropriate amount of shower gel, lather it all over the body, gently massage, rinse briefly, and then towel dry. No other personal care products that could affect the results were allowed during the test. A quantitative questionnaire was used to provide feedback on the product's effectiveness. The questionnaire included information on skin condition (dryness, itching, and redness) before and 14 days after product use, and user experience (foaming speed, foam density, difficulty rinsing, and tightness / dryness) after 14 days of product use. The total score was 10 points, with 1 point being the worst for skin condition (severe dryness, itching, and redness) and 10 points being the best (significant improvement in dryness, itching, and redness). User experience was also rated as 1 point being the worst (slow foaming speed, poor foam density, difficult to rinse, and tightness / dryness after washing) and 10 points being the best (fast foaming speed, dense foam, easy to rinse, and smooth, non-tight skin after washing). The average results are shown in Table 7 below.

[0061] Table 7 Group Skin condition score User experience rating Blank Application Example 2 1.8 1.5 Application Example 6 10.0 10.0 Comparative Application Example 12 6.2 7.8 Comparative Application Example 13 6.1 7.9 Comparative Application Example 14 5.7 7.4 Comparative Application Example 15 5.9 7.6 Comparative Application Example 16 7.0 8.1 Comparative Application Example 17 6.5 7.2 Comparative Application Example 18 7.4 6.3 Comparative Application Example 19 7.6 6.8 Comparative Application Example 20 7.1 7.0 Comparative Application Example 21 8.1 7.1 Comparative Application Example 22 8.3 6.6 As shown in Table 7, the dense, high-foaming soap-based shower gel containing a mild cleansing composition prepared by the present invention has good foaming performance during use, the foam is dense and easy to rinse, and there is no problem of dryness or tightness after rinsing. It is gentler on the skin and can effectively improve the skin condition after use.

[0062] Application Example 3: A bouncy and smooth silicone-free shampoo The mild cleaning compositions containing alkyl ether carboxylic acid surfactants of Examples 1-5 and Comparative Examples 1-11 were added to the volumizing and smoothing silicone-free shampoos at a concentration of 3 wt%, respectively, to obtain the volumizing and smoothing silicone-free shampoos of Application Examples 11-15 and Comparative Application Examples 23-33, respectively. In addition, the volumizing and smoothing silicone-free shampoo without the addition of mild cleaning compositions was prepared as blank application example 3. The formulation of the volumizing and smoothing silicone-free shampoo is shown in Table 8.

[0063] Table 8

[0064] The preparation methods of the fluffy and smooth silicone-free shampoo described in Application Examples 11-15 and Comparative Application Examples 23-33 include the following steps: S1. First, add the ingredients numbered 1-4 to the emulsification pot in sequence, and stir at 30 rpm until the mixture is evenly dissolved. S2. Then add the components numbered 5-6, heat to 80℃, and stir at 50 rpm for 20 minutes. S3. Next, add component number 7 (i.e., the dispersion obtained by mixing hydroxyethyl methyl cellulose and deionized water evenly), and stir at 80 rpm until the material is evenly dissolved. Then, continue to add components number 8-12. After the material is completely dissolved, turn on the cold circulating water and stir to cool down to 48°C. S4. Finally, add components 13-16 and continue mixing and stirring until a uniform and transparent liquid is formed. Then add component 17 to adjust the pH to 6.00 and discharge the product.

[0065] The preparation method of the fluffy and smooth silicone-free shampoo described in Blank Application Example 3 includes the following steps: S1. First, add the ingredients numbered 1-3 to the emulsification pot in sequence, and stir at 30 rpm until the mixture is evenly dissolved. S2. Then add the components numbered 5-6, heat to 80℃, and stir at 50 rpm for 20 minutes. S3. Next, add component number 7 (i.e., the dispersion obtained by mixing hydroxyethyl methyl cellulose and deionized water evenly), and stir at 80 rpm until the material is evenly dissolved. Then, continue to add components number 8-12. After the material is completely dissolved, turn on the cold circulating water and stir to cool down to 48°C. S4. Finally, add components 13-16 and continue mixing and stirring until a uniform and transparent liquid is formed. Then add component 17 to adjust the pH to 6.00 and discharge the product.

[0066] (1) Stability test Pour the fluffy and smooth silicone-free shampoo prepared in Application Examples 11-15 into test tubes, seal them, and place them in environments at room temperature, -5℃, 5℃, and 40℃ for three months, and observe the product appearance under light for one month.

[0067] Experimental results show that the bouncy and smooth silicone-free shampoo containing a mild cleaning composition prepared in this invention remains unchanged under the above-mentioned room temperature, -5℃, 5℃, 40℃ and light conditions, and is a colorless and transparent liquid with good storage stability.

[0068] (2) Skin patch test Referring to the relevant requirements and testing methods of "Human Skin Patch Test" in the "Cosmetic Safety Technical Specifications (2015 Edition)" issued by the Ministry of Health, the bouncy and smooth silicone-free shampoos of this invention (Application Examples 11-15, Comparative Application Examples 23-33, and Blank Application Example 3) were tested. Skin reactions were observed at 0h, 24h, and 48h. All volunteers showed negative results and no adverse skin reactions, indicating that the silicone-free shampoo of the mild cleansing composition containing alkyl ether carboxylic acid surfactants prepared by this invention will not cause allergic reactions, is non-irritating, and has high safety.

[0069] (3) Performance testing Test products: Fluffy and smooth silicone-free shampoos prepared in Application Example 11, Comparative Application Examples 23-33, and Blank Application Example 3; Test Method: Thirty-nine volunteers with dry hair, sensitive scalps, and aged 20-60 were randomly divided into 13 groups of 3. A combing test was conducted. The maximum combing force was used to measure the hair's anti-tangling performance, and the total combing effort was used to measure the hair's conditioning performance. ①Wet combability test: Wet the hair, rub the hair with about 2g of test product in the direction of the hair strand for 2 minutes, rinse with running water, comb once to remove excess water, test the wet combability on a micro tensile tester, the tensile rate is 300mm / min, each sample is tested 6 times, and the average test results are recorded as shown in Table 9 below. ② Dry combability test: After the wet combability test, the hair sample was placed in the air to dry. After it was dry, its dry combability was measured. The average test results were recorded as shown in Table 9 below. The decrease was compared with blank application example 3. The smaller the change in the dry and wet combing performance, the better the product makes the hair smoother.

[0070] Table 9

[0071] As shown in Table 9, the bouncy and smooth silicone-free shampoo containing a mild cleansing composition prepared in this invention can effectively improve the combability of hair when it is dry or wet, making the hair smoother.

[0072] (4) Color protection performance test Test products: Fluffy and smooth silicone-free shampoos prepared in Application Example 11, Comparative Application Examples 23-33, and Blank Application Example 3; Test Method: In vitro testing was conducted using real human hair bundles. Specifically, hair bundles from the same batch were selected, dyed with the same hair dye, washed with the same commercially available shampoo, and then air-dried. For each test, equal amounts of the samples from the example and comparative examples were washed, air-dried, and the color value was measured. Washing was repeated every two days for 20 cycles. A Minolta pedtrophotometer CM-2005d colorimeter was used to measure the color value of the hair before and after 20 washes, and the color difference was calculated. The formula for the color difference is: Color difference = Color value after washing - Color value before washing; The color protection effect of the test sample is evaluated by the size of the color difference. The smaller the color difference, the less the color fading and the better the color protection effect. Ten parallel tests were performed in each group, and the average results were recorded as shown in Table 10 below.

[0073] Table 10 Group Color difference Blank Application Example 3 5.5 Application Example 11 0 Comparative Application Example 23 2.2 Comparative Application Example 24 1.9 Comparative Application Example 25 2.5 Comparative Application Example 26 2.4 Comparative Application Example 27 1.7 Comparative Application Example 28 2.8 Comparative Application Example 29 4.5 Comparative Application Example 30 3.6 Comparative Application Example 31 3.3 Comparative Application Example 32 3.1 Comparative Application Example 33 3.9 As shown in Table 10, the bouncy and smooth silicone-free shampoo containing a mild cleaning composition prepared in this invention has a good color-protecting effect, and the color does not fade significantly after use.

[0074] (5) Evaluation of usage effect Test products: Fluffy and smooth silicone-free shampoos prepared in Application Example 11, Comparative Application Examples 23-33, and Blank Application Example 3.

[0075] Testing Method: 130 volunteers with dry hair, sensitive scalps, and aged 20-60 years were randomly divided into 13 groups of 10 people each. Each volunteer used the test product every three days for one month. The method of use was as follows: after wetting hair, take approximately 2g of shampoo in the palm of your hand, lather it up, and then apply it evenly to the hair. Gently massage from roots to ends for 2-3 minutes, then rinse thoroughly with water. During the test, no other shampoo or conditioner products that could affect the results were allowed. A quantitative questionnaire was used to provide feedback on the product's effectiveness. The questionnaire included ratings for lathering speed, foam volume, rinsing ability, combability, volume, and smoothness, with a total score of 10 points (10 being the best and 1 being the worst). The average results are recorded in Table 11 below.

[0076] Table 11 Foaming speed Foam volume Flushing performance Sorting fluffiness Smoothness Blank Application Example 3 4.3 4.7 4.8 3.5 3.9 4.1 Application Example 11 10.0 10.0 10.0 10.0 9.9 10.0 Comparative Application Example 23 7.5 7.7 7.9 7.8 7.5 8.0 Comparative Application Example 24 7.7 7.9 8.0 7.9 7.7 8.2 Comparative Application Example 25 7.3 7.5 7.6 7.5 7.1 7.7 Comparative Application Example 26 7.4 7.6 7.7 7.6 7.3 7.8 Comparative Application Example 27 7.9 8.1 8.2 8.0 7.9 8.3 Comparative Application Example 28 7.1 7.3 7.4 7.3 7.0 7.5 Comparative Application Example 29 6.2 6.4 6.5 6.4 6.2 6.6 Comparative Application Example 30 6.6 6.7 6.9 6.8 6.5 6.9 Comparative Application Example 31 6.7 6.8 7.1 6.9 6.7 7.2 Comparative Application Example 32 6.9 7.0 7.2 7.1 6.8 7.3 Comparative Application Example 33 6.4 6.6 6.7 6.6 6.4 6.7 As shown in Table 11, the bouncy and smooth silicone-free shampoo containing a mild cleansing composition prepared in this invention has good foaming properties, produces dense foam, and is easy to rinse after use. It can effectively clean the scalp, improve hair smoothness and volume, thereby improving hair quality.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A mild cleaning composition containing an alkyl ether carboxylic acid surfactant, characterized in that, The mild cleaning composition comprises the following raw materials: complex alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract. The weight ratio of the complex alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract is (8.6-11):(2-4):(0.5-1.5):(1-3):(1-3). The complex alkyl ether carboxylic acid is obtained by blending lauryl polyether-4 carboxylic acid, lauryl polyether-6 carboxylic acid, and lauryl polyether-11 carboxylic acid.

2. The mild cleaning composition containing alkyl ether carboxylic acid surfactants according to claim 1, characterized in that, The weight ratio of the compound alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract is (9.2-10.4):(2.5-3.5):(0.8-1.2):(1.5-2.5):(1.5-2.5).

3. The mild cleaning composition containing alkyl ether carboxylic acid surfactants according to claim 1, characterized in that, The weight ratio of lauryl ether-4 carboxylic acid, lauryl ether-6 carboxylic acid, and lauryl ether-11 carboxylic acid in the composite alkyl ether carboxylic acid is (5-7):(2-4):(0.4-1.2).

4. A method for preparing a mild cleaning composition containing an alkyl ether carboxylic acid surfactant according to any one of claims 1-3, characterized in that, Includes the following steps: Laureth-4 carboxylic acid, lauryl ether-6 carboxylic acid, and lauryl ether-11 carboxylic acid were mixed in a weight ratio and stirred evenly to obtain a composite alkyl ether carboxylic acid. The compound alkyl ether carboxylic acid, PPG-3 octyl ether, dipotassium glycyrrhizate, tuberose polysaccharide, and Cuscuta chinensis extract were mixed in a weight ratio and stirred evenly to obtain a mild cleaning composition containing alkyl ether carboxylic acid surfactants.

5. The application of the mild cleaning composition containing alkyl ether carboxylic acid surfactants prepared by the method according to claim 4, characterized in that, The mild cleansing composition can be used to prepare high-oil-content bath oils, rich, foaming soap-based shower gels, and fluffy, smooth, silicone-free shampoos.

6. A high-oil-content bath oil, characterized in that, The raw materials of the high-oil-content bath oil include a mild cleaning composition of an alkyl ether carboxylic acid surfactant as described in any one of claims 1-4, wherein the amount of the mild cleaning composition added to the high-oil-content bath oil is 10wt%-15wt%.

7. A rich, high-foaming soap-based shower gel, characterized in that, The raw materials of the rich, foaming soap-based shower gel include a mild cleaning composition containing an alkyl ether carboxylic acid surfactant as described in any one of claims 1-4, wherein the amount of the mild cleaning composition added to the rich, foaming soap-based shower gel is 0.2wt%-5wt%.

8. A fluffy and smooth silicone-free shampoo, characterized in that, The raw materials of the fluffy and smooth silicone-free shampoo include a mild cleaning composition containing an alkyl ether carboxylic acid surfactant as described in any one of claims 1-4, wherein the amount of the mild cleaning composition added to the fluffy and smooth silicone-free shampoo is 0.5wt%-5wt%.

Images