Mild cleaning composition

Abstract

The invention discloses a mild cleaning composition, and relates to the technical field of daily chemical cleaning products. The mild cleaning composition comprises water and the following components in percentage by mass: (a) 3%-12% of an amino acid type surfactant which is formed by mixing a taurine salt surfactant and a glutamate surfactant in a mass ratio of (2: 1)-(1: 2); (b) 1.2%-3% of a zwitterionic surfactant; (c) 0.1%-4% of long-chain fatty acid polyether carboxylic acid or salts thereof; (d) 1%-6% of a nonionic surfactant; (e) 0.05%-2% of a solubilizer; (f) 0.5%-3.8% of a thickening agent; the pH value of the mild cleaning composition is 5.0 to 6.0. The mild cleaning composition provided by the invention can form a certain viscosity, is transparent and stable at low temperature, is compatible with grease or cationic polymer, has stable viscosity, and has no irritation to skin and eyes.

Description

Technical Field

[0001] The invention relates to the technical field of daily chemical cleaning products, in particular to a mild skin or hair cleaning composition and application thereof. Background Art

[0002] Daily cleaning for consumers includes shampooing, bathing and face washing. Surfactants are most commonly used in cleaning products. Appropriate cleaning power of surfactants is a basic requirement, but excessive and frequent contact and use can also cause abnormal hair or skin problems, especially some cleaning systems that are not gentle enough. Abnormal skin problems include dryness, scaling, redness, hair loss, etc. For sensitive skin and baby skin, a gentle cleaning system is essential for skin or hair health. Common mild systems mostly use sulfate-free anionic surfactants such as amino acid surfactants, but cleaning systems using such anionic surfactants generally have problems such as difficulty in thickening, incompatibility with cationic polymers, inability to accommodate oils and fats, and low-temperature transparent precipitation.

[0003] For cleaning products, in order to meet consumer demand, most products need to have a certain viscosity. Amino acid surfactants are easier to thicken than sarcosine and alanine types, but these two types of surfactants have stronger skin irritation and degreasing power than other amino acid surfactants such as glutamic acid or taurine. Patent CN 118044996A discloses a self-thickening composition of an amino acid surfactant, which comprises sodium methyl cocoyl taurate, sodium lauroyl sarcosinate, sodium lauroyl glutamate and an acceptable carrier in the field of personal care, wherein the weight ratio of sodium methyl cocoyl taurate, sodium lauroyl sarcosinate and sodium lauroyl glutamate is limited, and the total concentration of surfactants is 8-20% by weight. The compound in this invention patent still uses a sarcosine surfactant with a good thickening effect.

[0004] Patent CN 110582266 A discloses a sulfate-free cleaning composition, which contains a surfactant and a conditioning agent. The cleaning composition has a desired transparency level, weak acidity, and is mild to the skin and / or eyes. The cleaning composition uses a surfactant system of sodium methyl cocoyl taurate, sodium cocoyl isethionate, glucoside surfactant, and PEG-80 sorbitan laurate. The composition has the characteristics of transparency, viscosity, weak acidity, and conditioning. However, the transparency of the composition is limited to transparency at 25°C. It is a great challenge for the transparency of the system containing amino acid surfactants under low temperature conditions. Moreover, a stable cleaning system needs to maintain a certain transparency of the product at least above 0°C and no precipitation to meet consumers' high requirements for product performance and quality. Regarding the conditioning of the composition, from the content of the invention, it is only compatible with cationic polymers of polyquaternium-10, and there is no mention of compatibility with other non-cellulose modified cationic polymers such as polyacrylic acid / acrylamide, so its compatibility with cations has certain limitations.

[0005] Patent CN 117598939 A discloses a bathing liquid and a preparation method thereof. The bathing liquid comprises: 0.1-15% emulsifier, 10-50% oil, 1-25% polyol, 0-10% surfactant, 0.5-5% preservative and essence, and water and / or water-soluble components as the balance. The bathing liquid obtained has a high oil loading, and the emulsion can be quickly dispersed in water, has a delicate and smooth skin feel and excellent stability, and is mild and non-irritating to the skin. The invention emulsifies the oil, adds an amino acid surfactant with a cleaning effect, and uses a special process (D phase emulsification) to obtain an oil-in-water emulsion. It is a common practice to contain oil by emulsification, which has no reference significance for transparent cleaning systems. Summary of the invention

[0006] Based on this, the present invention provides a mild cleansing composition, which contains a mild amino acid surfactant, a zwitterionic surfactant, a long-chain fatty acid polyether carboxylic acid or its salts, a non-ionic surfactant, a solubilizer, and a thickener. The composition can form a certain viscosity, is transparent and stable at low temperature, is compatible with oils or cationic polymers and has stable viscosity, is non-irritating to the skin and eyes, can be used in skin and hair cleansing care products, and is particularly suitable for sensitive skin and infants.

[0007] The amino acid surfactant in the present invention includes a combination of a taurate surfactant and a glutamate surfactant. The hydrophilic head of this type of surfactant is large and mild to the skin and eyes, but it is difficult to thicken and is easy to precipitate at low temperatures. The taurate surfactant described in the present invention is sodium methyl cocoyl taurate. The free fatty acid content in sodium methyl cocoyl taurate is less than 2%, and the sodium chloride content is less than 1%. Free fatty acids and sodium chloride are inevitable impurities of this component in the synthesis process. The present invention has found that controlling the amount of free fatty acids and sodium chloride in sodium methyl cocoyl taurate, especially the amount of free fatty acids, is more conducive to the viscosity control, transparency and low-temperature transparency stability of the composition of the present invention. Controlling the free fatty acids and sodium chloride of sodium methyl cocoyl taurate is helpful for stability, but the raw material itself is milky when used alone at a temperature below 20°C. The transparent state of the glutamate surfactant needs to keep its pH above 7, so these two types of surfactants are used in transparent systems and can maintain low-temperature transparency. There are great challenges. The composition of the present invention realizes the application of two types of amino acid surfactants in a transparent system by controlling the combination ratio. The mass ratio of the taurine surfactant to the glutamate surfactant is 2:1 to 1:2. Within this ratio range, the two surfactants solubilize each other and synergize to enhance the effect.

[0008] Specifically, the present invention provides a mild cleaning composition, comprising water and the following components in percentage by weight:

[0009] (a) 3% to 12% of an amino acid surfactant, which is a mixture of a taurine surfactant and a glutamate surfactant, wherein the mass ratio of the taurine surfactant to the glutamate surfactant is 2:1 to 1:2;

[0010] (b) 1.2% to 3% zwitterionic surfactant;

[0011] (c) 0.1% to 4% of long-chain fatty acid polyether carboxylic acid or its salts;

[0012] (d) 1% to 6% of a nonionic surfactant;

[0013] (e) 0.05% to 2% of a solubilizing agent;

[0014] (f) 0.5% to 3.8% of a thickener;

[0015] The pH of the mild cleansing composition is 5.0-6.0.

[0016] Preferably, the taurine surfactant is selected from methyl coconut oil acyl taurate; and the glutamate is selected from disodium coconut oil acyl glutamate.

[0017] More preferably, the free fatty acid content in the methyl coconut oil acyl taurate is less than 2 wt %, and the sodium chloride content is less than 1 wt %.

[0018] Preferably, the zwitterionic surfactant is selected from at least one of sodium lauroamphoacetate, sodium cocoamphoacetate, disodium cocoamphodiacetate, and disodium lauroamphodiacetate. The zwitterionic surfactants usually used with anionic surfactants are betaine surfactants such as cocamidopropyl betaine and lauryl hydroxysulfobetaine. The composition of the present invention particularly uses sodium amphoteric acetate surfactants, and the composition of the present invention has multiple excellent properties through combination.

[0019] Preferably, the long-chain fatty acid polyether carboxylic acid or its salt is selected from at least one of laureth-4 carboxylic acid or its sodium salt, laureth-5 carboxylic acid or its sodium salt, laureth-6 carboxylic acid or its sodium salt, C12-13 pareth-8 carboxylic acid or its sodium salt, C12-15 pareth-12 carboxylic acid or its sodium salt, and laureth-11 carboxylic acid or its sodium salt. The carboxylate anionic surfactant cooperates with the amino acid surfactant to enhance the compatibility of the cationic polymer.

[0020] Preferably, the nonionic surfactant is selected from at least one of a glucoside surfactant and a polyether sorbitan laurate surfactant. The glucoside surfactant is selected from at least one of decyl glucoside, lauryl glucoside and coconut glucoside. The polyether sorbitan laurate is selected from PEG-80 sorbitan laurate.

[0021] Preferably, the solubilizer is selected from at least one of laureth-2, laureth-3, glyceryl oleate, glyceryl laurate, C12-13 polyether-2, and C12-13 polyether-3. More preferably, the solubilizer is selected from at least one of laureth-3, glyceryl oleate, and C12-13 polyether-3; most preferably, the solubilizer is selected from C12-13 polyether-3. In a system containing oil, a transparent appearance requires a fine combination of solubilizers, requiring micelles to form spheres, micelle outer layers to be closely arranged, and hydrophobic cavities to be large enough. However, although most solubilizers can achieve a solubilizing effect, they will destroy the hinge-type or worm-type micelles formed by the formula itself to construct viscosity, causing a significant decrease in viscosity and being unable to increase viscosity by a thickener. The composition of the present invention selects a special solubilizer to cooperate with other components of the present invention to achieve efficient solubilization of oils and fats without affecting viscosity. The use of oils and fats can provide more product efficacy and conditioning to the cleaning composition.

[0022] Preferably, the thickener is selected from at least one of PEG-150 distearate, PEG-150 pentaerythritol tetrastearate, cocamide MEA, cocamide methyl MEA, and PPG-2 hydroxyethyl cocamide. The thickener of the composition of the present invention has excellent thickening efficiency after being used in coordination with other components and is also compatible with cationic polymers when added in a high amount, so that the application range of the composition is wider and the performance adjustment is more convenient.

[0023] The mild cleansing composition of the present invention has a viscosity of 1000 cP to 6000 cP at 25° C. The pH value is preferably 5.3-6.0, which is close to the skin and has good affinity to the skin.

[0024] Furthermore, the mild cleaning composition also includes a cationic polymer or oil, and has a transparent appearance at both room temperature and low temperature.

[0025] Preferably, the cationic polymer is selected from polyquaternium salts, such as one or more of polyquaternium-7, polyquaternium-10, polyquaternium-22, and polyquaternium-53; the mass content of the cationic polymer in the mild cleaning composition is 0.01%-0.5%.

[0026] Preferably, the oil is selected from one or more of cetyl ethylhexanoate and caprylic / capric triglyceride; the mass content of the oil in the mild cleansing composition is 0.01%-2%.

[0027] The mild cleansing composition of the present invention can form a certain viscosity, is transparent and stable at low temperature, is compatible with oils or cationic polymers and has stable viscosity, is non-irritating to the skin and eyes, can be used in skin and hair cleansing care products, and is particularly suitable for sensitive skin and infants. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0029] Figure 1 The mild cleansing composition set of Example 1 was placed at 4° C. for 3 months.

[0030] Figure 2 This is the state of the mild cleansing composition set of Example 6 after being placed at 4°C for 3 months.

[0031] Figure 3 This is the state of the mild cleansing composition set of Example 13 after being placed at 4°C for 3 months.

[0032] Figure 4 The composition group of Comparative Example 1 was placed at 4° C. for 3 months.

[0033] Figure 5 The composition group of Comparative Example 7 was placed at 4° C. for 3 months.

[0034] Figure 6 Compatibility test results of adding different cationic polymers to the composition of Example 6.

[0035] Figure 7 The compatibility test results of the composition of comparative example 9 with polyquaternium salt-7 are shown.

[0036] Figure 8 The compatibility test results of the composition of Comparative Example 11 with polyquaternium salt-7 are shown.

[0037] Fig. 9 The solubilization test results of adding different oils to the composition of Example 1 are shown.

[0038] Fig.10 The solubilization test results of adding different oils to the composition of Example 6 are shown.

[0039] Fig.11 The solubility test results of adding different oils to the composition of Comparative Example 13 are shown.

[0040] Fig.12 This is the appearance of the composition of Comparative Example 16. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0043] Viscosity test:

[0044] The viscosity of the composition of the present invention is measured using a Brookfield viscometer at 25° C. with a LV 3# rotor and 12 rpm.

[0045] Determination of transparency:

[0046] The samples were placed at room temperature and 4°C to observe transparency. The low-temperature stability test required placing them in a 4°C refrigerator for 3 months and then observing them at 4°C.

[0047] Mildness test:

[0048] The present invention uses three methods to determine the mildness of the composition, namely, the zein test (Zeintext), the human skin keratinocyte toxicity test, and the acute eye irritation / corrosion test (Cosmetic Safety Technical Specifications).

[0049] Zein test is a convenient and fast non-animal test method for determining the skin irritation of surfactant-containing systems. Zein is similar to the protein structure in human skin and hair, has unique solubility, is almost insoluble in water, but can be dissolved in aqueous solutions of surfactants. After the interaction between zein and surfactants, the spatial conformation changes, thereby changing the water solubility of zein, and its water solubility increases. The content of Zein protein dissolved in the surfactant aqueous solution is proportional to the skin irritation caused by it, from which the strength of the surfactant irritation can be understood. This method can be used to determine the skin irritation of the original surfactant system. This test uses a 50% sample solution concentration to eliminate the interference of viscosity on the test data. The experimental test process is as follows: prepare an aqueous solution with a total active matter mass fraction of 50% of the sample to be tested, weigh about 20g, stir with a ten-point magnetic stirrer, add excess zein while stirring, and stir for about 4h to make the zein solution reach a supersaturated state. Then, after two centrifugations at different speeds, the supernatant is taken. According to the characteristics of the sample, the corn protein solution is diluted with 50% sample aqueous solution at a certain multiple, and the corn protein content, i.e., zein value, is tested according to the instructions of the BCA kit. The irritation of the test substance can be classified according to the zein value. A zein value less than 200 belongs to the non-irritation range, a zein value between 200 and 400 belongs to the medium irritation range, and a zein value greater than 400 belongs to the strong irritation range.

[0050] The cell exposure experiment is a cytotoxicity test. It uses human skin keratinocytes (Hacat) as the target organ of skin irritation. After the test substance intervenes in the cells for 24 hours, the cytotoxicity is determined by the CCK8 method. The skin irritation of the test substance is judged by the CV80 value. CV80 represents the sample concentration when 80% of the cells survive. The CV80 value is inversely proportional to the skin irritation. The experimental test process is as follows: 1) Prepare 100μl of cell suspension in a 96-well plate. Pre-culture the culture plate in an incubator for 24 hours (at 37°C, 5% CO2); 2) Add 10μl of the test substance of different concentrations to the culture plate; 3) Culture the culture plate in an incubator for 24 hours; 4) Add 10μl of CCK-8 solution to each well; 5) Culture the culture plate in an incubator for 2-3 hours; 6) Measure the absorbance at 450nm and formulate a standard curve to calculate the CV80 value.

[0051] The acute eye irritation / corrosion test is carried out in accordance with the method in the 2015 edition of the Cosmetic Safety Technical Specifications, to evaluate the mean value of the irritation response integral and the recovery time of the cornea, iris or conjunctiva of the animals at 24, 48 and 72 hours after exposure to the test substance, and to determine the irritation intensity of the test substance to the eye according to the eye irritation response classification in the method.

[0052] Cationic polymer compatibility testing:

[0053] In certain cases, it is necessary to add cationic polymers to the cleaning composition system. Cationic polymers have the characteristic of forming a film on the skin or hair, which can improve the irritation of surfactants to a certain extent, keep the skin comfortable or moist, improve the shampooing experience, and enhance the softness or gloss of hair. The effect of cationic polymers is usually achieved through flocculation after the cleaning product is diluted, and the generation of flocculation is based on the interaction between anions and cations. If the cleaning composition system itself has poor solubility for cationic polymers, flocculation will occur after the cationic polymer is added to the cleaning composition, which is manifested in the turbidity or precipitation of the composition appearance, affecting the stability of the product and failing to play a good conditioning role of the cationic polymer. Therefore, the most direct way to observe whether the cationic polymer is compatible in a transparent cleaning system is to add a certain amount of cationic polymer to the composition system and observe whether the composition is transparent.

[0054] Polyquaternium salt is a commonly used conditioning agent. The main structure of polyquaternium salt includes quaternary ammonium salt modified cellulose, polymers polymerized by dimethyl allyl ammonium chloride or methacryloyl propyl trimethyl ammonium chloride or acrylic acid or acrylamide. Polyquaternium salts of different structural types have different properties and compatibility. Usually, it is difficult to be compatible with polyquaternium salt conditioning agents of various structures in the cleaning composition system containing amino acid type surfactants. The cleaning composition of the present invention can be compatible with polyquaternium salt conditioning agents of various structural types such as polyquaternium salt-7 (copolymerized by dimethyl allyl ammonium chloride and acrylamide), polyquaternium salt-10 (quaternary ammonium salt modified cellulose) of different molecular weights, polyquaternium salt-22 (copolymerized by dimethyl allyl ammonium chloride and acrylic acid), and polyquaternium salt-53 (copolymerized by methacryloyl propyl trimethyl ammonium chloride, acrylic acid and acrylamide).

[0055] Grease compatibility test:

[0056] The right amount of oil is particularly critical for the use of cleaning compositions in shampoo products. Oils and cationic conditioners can effectively improve the combing, gloss and smoothness of hair. For systems with low surfactant content, especially those dominated by amino acid-based surfactants, it is difficult to solubilize oils. Even if they can be solubilized, the amount required for hair conditioning cannot be reached, or some solubilization systems themselves will greatly reduce the viscosity of the system, and it is difficult to rebuild the appropriate viscosity. This cleaning composition can effectively solubilize hair care oils to a transparent state and exert the hair care effect of the oils. The oil compatibility test is to mix the oil with the solubilizer in the composition when preparing the composition, then add it to the system, use the conventional preparation process, and observe whether the composition is transparent. This oil test uses oils commonly used in hair cleansing products such as cetyl ethylhexanoate and caprylic / capric triglyceride. The two oils represent long-chain monoesters and long-chain triglycerides.

[0057] The sodium methyl cocoyl taurate raw material used in the embodiment of the present invention has a free fatty acid content of 1.02 wt % and a sodium chloride content of less than 0.77 wt %.

[0058] The formulation process of the following composition can be carried out according to the conventional practice of conventional cleaning systems.

[0059] The mild cleaning composition components and test results of Examples 1-6 are shown in Table 1.

[0060] Table 1 Components and test results of mild cleaning compositions of Examples 1-6

[0061]

[0062]

[0063] Note: VERSATHIX is a mixture of 30wt% water, 45wt% PEG-150 pentaerythritol tetrastearate, and 25wt% PPG-2 hydroxyethyl cocamide.

[0064] The mild cleaning composition components and test results of Examples 7-13 are shown in Table 2.

[0065] Table 2 Components and test results of mild cleaning compositions of Examples 7-13

[0066]

[0067]

[0068] Note: VERSATHIX is a mixture of 30wt% water, 45wt% PEG-150 pentaerythritol tetrastearate, and 25wt% PPG-2 hydroxyethyl cocamide.

[0069] The mild cleaning composition set of Example 1 was placed at 4°C for 3 months. Figure 1 The mild cleaning composition group of Example 6 was placed at 4°C for 3 months. Figure 2 The mild cleaning composition group of Example 13 was placed at 4°C for 3 months. Figure 3 shown.

[0070] The present invention also prepares the following compositions of Comparative Examples 1-10. The components and test results of the compositions of Comparative Examples 1-10 are shown in Table 3.

[0071] Table 3 Composition components and test results of comparative examples 1-10

[0072]

[0073]

[0074] Note: VERSATHIX is a mixture of 30wt% water, 45wt% PEG-150 pentaerythritol tetrastearate, and 25wt% PPG-2 hydroxyethyl cocamide.

[0075] The composition group of Comparative Example 1 was placed at 4°C for 3 months. Figure 4 As shown; the composition group of Comparative Example 7 was placed at 4°C for 3 months. Figure 5 shown.

[0076] By comparing the viscosity and low temperature stability of the compositions of the examples and comparative examples in Tables 1 to 3, it can be seen that:

[0077] 1) By comparing Example 1 with Comparative Example 1 and Comparative Example 2, it can be seen that by removing the long-chain fatty acid polyether carboxylic acid or its salt and the nonionic surfactant component in the composition of the present invention or the content of each component in the composition is lower than the range of the composition of the present invention, the overall formula cannot build a suitable viscosity and precipitates under low temperature conditions.

[0078] 2) By comparing Example 4 with Comparative Example 3, it can be seen that when the content of the thickener is lower than the range of the composition of the present invention, it is also impossible to build a suitable viscosity of the composition.

[0079] 3) By comparing Example 7 with Comparative Examples 4 and 5, it can be seen that a pH value beyond the scope of this protection will cause the composition to precipitate at low temperature or have too low a viscosity. If the pH is too low, the system will be opaque at room temperature. If the pH is too high, the viscosity will be too low, making thickening more challenging.

[0080] 4) By comparing Example 6 with Comparative Examples 6 and 7, it can be seen that when the mass ratio of taurine-type surfactant to glutamic acid-type surfactant is outside the scope of the present invention, problems such as failure to thicken or precipitation at low temperature may occur.

[0081] In addition, the total surfactant content of the composition of the present invention is up to more than 20%, which is already very high. General cleaning products will not reach such an amount, so the content beyond the scope of the present invention has no practical significance.

[0082] A mildness comparison test of the mild cleaning composition of the present invention and mild cleaning products on the market was conducted.

[0083] Comparative Example 11: Children's shampoo sold in the market claims to be mild. The ingredients before the trace ingredients in its label are: "water", "cocamidopropyl betaine", "glycerin", "sodium cocoyl methyl taurate taurate", "sodium chloride", "sodium C14-16 olefin sulfonate", "sodium isostearyl lactylate", "maltooligosaccharide glucoside", "disodium cocoyl glutamate", "PPG-3 caprylyl ether", "capryloyl glycine", "hydrogenated starch hydrolysate", "polyquaternium-10", "sodium lauroamphoacetate", "(daily use) fragrance", "caprylyl glycol", "1,2-hexanediol".

[0084] Comparative Example 12: Baby shampoo and shower gel sold in the market claims to be mild. The ingredients before the trace ingredients in its label are: "water", "cocamidopropyl betaine", "decyl glucoside", "sodium lauroamphoacetate", "acrylates / beheneth-25 methacrylate copolymer", "PEG-150 distearate", "glycerin", "sodium cocoyl apple amino acids", "1,2-hexanediol", "parahydroxyacetophenone", "arginine", "citric acid", "glyceryl oleate", "cocoyl glucoside".

[0085] The mildness test results of Examples 1 and 9 and Comparative Examples 11 and 12 are shown in Table 4.

[0086] Table 4 Mildness test results of Examples 1, 9 and Comparative Examples 11, 12

[0087] Test items / results Example 1 Example 9 Comparative Example 11 Comparative Example 12 ZEIN value (mgN / 100ml) 13.1 59.7 194.7 16.7 CV80(%) 0.0914 0.0710 0.0412 0.0600 Acute eye irritation test Non-irritating Non-irritating Slightly irritating Non-irritating

[0088] By comparing the results in Table 4, it can be seen that: 1) Two methods of different stimulation pathways, namely corn alcohol solution, cytotoxicity, and the test method of acute eye irritation of animals, all prove that the mild cleaning composition of the present invention has good mildness. The mild cleaning composition of the present invention has good mildness to epidermal proteins, keratinocytes, and eyes through innovative and reasonable combination; 2) Although the irritation tested by the corn alcohol solution method of Comparative Example 11 (mild product on the market) belongs to the non-irritating range, the mild cleaning composition of the present invention has lower irritation and toxicity, and the mild cleaning composition of the present invention is non-irritating to animal eye irritation test, while the commercial product of Comparative Example 11 is irritating; 3) The mild cleaning composition of Example 1 of the present invention is less irritating than Comparative Example 12 (mild product on the market), and its toxicity is also weaker than Comparative Example 12.

[0089] The present invention also conducted the following cationic compatibility test.

[0090] On the basis of the components shown in Example 1, Example 6, Comparative Example 8, Comparative Example 9, Comparative Example 11, and Comparative Example 12, 0.1% of polyquaternium-7, polyquaternium-10, polyquaternium-22, and polyquaternium-53 were added by mass fraction to prepare a composition as shown in Table 5 below, and the appearance of the material of the composition was observed. The results are shown in Table 5.

[0091] Table 5 Cationic polymer compatibility test plan and test results

[0092]

[0093] The compatibility test results of the composition of Example 6 with different cationic polymers are as follows: Figure 6 As shown; the compatibility test results of the composition of Comparative Example 9 and the polyquaternary ammonium salt-7 are as shown Figure 7 As shown; the compatibility test results of the composition of Comparative Example 11 and the addition of quaternary ammonium salt-7 are as shown Figure 8 shown.

[0094] By comparing the results in Table 5, it can be seen that: 1) the composition of the present invention has a good ability to be compatible with cationic polymers of various structural types; 2) the long-chain fatty acid polyether carboxylic acid or its salt in the composition of the present invention can effectively improve the ability to be compatible with various types of cationic polymers (such as polyquaternium-10, polyquaternium-7, polyquaternium-53); 3) the addition of too much non-ionic surfactant has a great interference with the ability of the system to be compatible with multiple types of cationic polymers; 4) compared with the present invention, the commercially available products of Comparative Examples 11 and 12 are limited in the types of cation compatibility, so the formula has very limited room for conditioning adjustment, and cannot meet the actual needs of consumers for a variety of experiences.

[0095] The present invention also prepares the following compositions of Comparative Examples 13-15. The components and test results of the compositions of Comparative Examples 13-15 are shown in Table 6.

[0096] Table 6 Composition components and test results of Comparative Examples 13-15

[0097]

[0098]

[0099] From the test results in Table 6, it can be seen that the compositions of Comparative Examples 13, 14 and 15 use a solubilizer commonly used in the art other than the present invention, which is very unfavorable for building the viscosity of the composition even if the content of the nonionic surfactant is increased.

[0100] Furthermore, the present invention also carried out the following experiment of oil solubilization test.

[0101] On the basis of the components shown in Example 1, Example 6, Comparative Example 9, Comparative Example 10, and Comparative Examples 13-15, cetyl ethylhexanoate and caprylic / capric triglyceride were added in mass fractions as shown in Table 7 below to prepare a composition, and the appearance of the composition was observed. The results are shown in Table 7.

[0102] Table 7 Oil solubilization test plan and test results

[0103]

[0104] The test results of the solubility test of the composition of Example 1 on different oils are as follows: Fig. 9 As shown; the test results of the composition of Example 6 to increase the solubility of different oils are as follows Fig.10 As shown; the test results of the solubilization test of the composition of Comparative Example 13 by adding different oils are as follows Fig.11 shown.

[0105] By comparing the test results in Table 7, it can be seen that: 1) the composition of the present invention is well compatible with different types of oils and fats, and even when the amount of solubilizer added is very small, a small amount of oils and fats can be solubilized to be transparent; by comparing the solutions using the components of Example 1, Example 6 and Comparative Examples 9 and 10, it can be seen that after removing the solubilizer in the composition (Comparative Example 10), the solubilization ability is significantly reduced, and even with more non-ionic surfactants (Comparative Example 9), the solubilization of oils and fats cannot be achieved, indicating that the solubilizer in the present composition and other combinations have achieved a good solubilization effect of oils and fats through a synergistic formulation. Further comparison of the viscosity test results of Example 1 and Comparative Example 10 shows that the presence or absence of a solubilizer in the composition has almost no effect on the viscosity, and the composition of the present invention can solubilize oils and fats without reducing the viscosity; 2) By comparing the test results of the solutions using Example 6, Comparative Examples 13, 14, and 15, it can be seen that replacing the solubilizer in the present invention with other commonly used solubilizers in the art is not only very unfavorable for the construction of the viscosity of the composition, but also has a limited solubilization effect. Some solubilizers cannot solubilize both types of oils and fats, and some solubilizers cannot solubilize long-chain triester oils and fats.

[0106] The free fatty acid content of the raw material of sodium methyl cocoyl taurate used in the present invention is less than 2%, and the sodium chloride content is less than 1%. In order to illustrate the influence of the free fatty acid content and sodium chloride content in the raw material of sodium methyl cocoyl taurate on the composition of the present invention, a comparative example 16 composition is prepared. Compared with Example 6, the quality index of the sodium methyl cocoyl taurate used in the comparative example 16 composition is different, the addition amount in the formula is the same, and the other formula raw materials and contents are exactly the same. The specific contents of free fatty acids and sodium chloride in the raw materials of sodium methyl cocoyl taurate used in comparative example 16 and Example 6 are shown in Table 8.

[0107] Table 8 Free fatty acid and sodium chloride content of sodium methyl cocoyl taurate in comparative example 16 and example 6

[0108] Example / Comparative Example Free fatty acids% Sodium chloride% Example 6 1.02 0.77 Comparative Example 16 5.01 5.0

[0109] The appearance of the prepared comparative example 16 composition is as follows Fig.12 As shown, it has a slightly white appearance at room temperature and cannot achieve the transparency of Example 6.

[0110] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A mild cleaning composition, characterized in that Includes water and the following components in percentage by mass: (a) 3% to 12% of an amino acid surfactant, which is a mixture of a taurine surfactant and a glutamate surfactant, wherein the mass ratio of the taurine surfactant to the glutamate surfactant is 2:1 to 1:2; (b) 1.2% to 3% zwitterionic surfactant; (c) 0.1% to 4% of long-chain fatty acid polyether carboxylic acid or its salts; (d) 1% to 6% of a nonionic surfactant; (e) 0.05% to 2% of a solubilizing agent; (f) 0.5% to 3.8% of a thickener; The pH of the mild cleansing composition is 5.0-6.

0.

2. The mild cleaning composition according to claim 1, characterized in that The taurine surfactant is selected from methyl coconut oil acyl taurate; the glutamate is selected from disodium coconut oil acyl glutamate.

3. The mild cleaning composition according to claim 2, characterized in that The free fatty acid content of the methyl coconut oil acyl taurate is less than 2wt%, and the sodium chloride content is less than 1wt%.

4. The mild cleaning composition according to claim 1, characterized in that The zwitterionic surfactant is selected from at least one of sodium lauroamphoacetate, sodium cocoamphoacetate, disodium cocoamphodiacetate and disodium lauroamphodiacetate.

5. The mild cleaning composition according to claim 1, characterized in that The long-chain fatty acid polyether carboxylic acid or its salt is selected from at least one of laureth-4 carboxylic acid or its sodium salt, laureth-5 carboxylic acid or its sodium salt, laureth-6 carboxylic acid or its sodium salt, C12-13 polyether-8 carboxylic acid or its sodium salt, C12-15 polyether-12 carboxylic acid or its sodium salt, and laureth-11 carboxylic acid or its sodium salt.

6. The mild cleaning composition according to claim 1, characterized in that The nonionic surfactant is selected from at least one of a glucoside surfactant and a polyether sorbitan laurate surfactant.

7. The mild cleaning composition according to claim 1, characterized in that The solubilizer is selected from at least one of laureth-2, laureth-3, glyceryl oleate, glyceryl laurate, C12-13 parathion-2, and C12-13 parathion-3.

8. The mild cleaning composition according to claim 1, characterized in that The thickener is selected from at least one of PEG-150 distearate, PEG-150 pentaerythritol tetrastearate, cocamide MEA, cocamide methyl MEA, and PPG-2 hydroxyethyl cocamide.

9. The mild cleaning composition according to any one of claims 1 to 9, characterized in that The viscosity is 1000 cP to 6000 cP at 25°C.

10. The mild cleaning composition according to claim 1, characterized in that Also included are cationic polymers or oils.

Images