Soap-based cleansing composition with high fatty acid content as well as preparation method and application of soap-based cleansing composition

Abstract

The invention discloses a soap-based cleansing composition with high fatty acid content. The soap-based cleansing composition is prepared from the following raw materials in percentage by weight: 25-45% of fatty acid, 20-40% of polyhydric alcohols, 5-10% of alkaline substances, 3-8% of a skin conditioner, 2-7% of a cleaning agent, 0.01-0.1% of an auxiliary agent, 0.5-0.8% of a preservative and the balance of water. The fatty acid with the content of 35% or above is adopted in the system, the system is a high-fatty-acid soap base system, and the stability of the high-soap base system is improved by adjusting the weight ratio of the polyhydric alcohol, the fatty acid and the alkaline matter. The soap-based cleansing cream with high fatty acid content can be prepared from fatty acid, polyhydric alcohols and alkaline substances according to the weight ratio of (29.3-44): (23-39): (6-9.5), the cleansing feeling is excellent, the foam richness is high, the product stability is high, and the defect that a high soap-based system is relatively hard and inconvenient to use after being caked and crystallized in the saponification process is overcome.

Description

Technical Field

[0001] The invention relates to A61K and the field of makeup preparations, and in particular to a soap-based facial cleansing composition with a high fatty acid content, a preparation method and an application thereof. Background Art

[0002] Facial cleansing products have become indispensable products for modern people to cleanse their faces. The quality of facial cleansing products is an important condition for the quality of skin. Good facial cleansing products also have the effect of skin care and can lay a good foundation for the subsequent makeup steps. Products based on fatty acid salts have strong cleaning power and are one of the most popular surfactant products among facial cleansing products. The production principle of soap-based facial cleansing products is that fatty acids and alkalis undergo saponification reactions. The resulting fatty acid salts have a higher solubility at high temperatures and a lower solubility at low temperatures. The difference in solubility between high and low temperatures is used to make the material crystallize into a paste. However, for soap-based systems, higher fatty acid content is prone to agglomeration at high temperatures, resulting in failure of soap-based reactions, or too high hardness of the material, resulting in decreased use effects. Therefore, it is crucial to develop a facial cleanser with a high fatty acid content and suitable washing feel and hardness.

[0003] Chinese invention patent CN201310296440.1 discloses a soap-based cleansing cream and a preparation method thereof, which is mainly made of fatty acids, polyols, potassium hydroxide, emulsifiers, polyquaternium-7, guar hydroxypropyltrimethylammonium chloride, ion chelating agents, essences and deionized water. The prepared soap-based cleansing cream has rich, dense and stable foam and can protect the skin. However, the fatty acid content is low. Chinese invention patent CN202111051251.9 discloses a mild, moisturizing and stable soap-based cleansing cream and a preparation method thereof. The invention optimizes the total content of fatty acids, amino acid surfactants and polyols and the special ratio between the raw materials, successfully overcomes the problem of unstable formula of low-content soap-based systems, and can significantly improve the moisturizing feeling of the soap-based system and reduce the tightness of the face after soap-based cleaning. However, the fatty acid content is below 30%, and the soap-based content is low. Summary of the invention

[0004] In order to develop a facial cleanser with a high fatty acid content and suitable washing feel and hardness, the first aspect of the present invention provides a soap-based facial cleanser composition with a high fatty acid content. The preparation raw materials include, by weight percentage: 25-45% fatty acid, 20-40% polyol, 5-10% alkaline substance, 3-8% skin conditioner, 2-7% detergent, 0.01-0.1% auxiliary agent, 0.5-0.8% preservative, and water supplemented to 100%.

[0005] As a preferred embodiment, the fatty acid is at least one selected from the group consisting of myristic acid, palmitic acid, lauric acid, stearic acid, hydroxystearic acid, and glyceryl hydroxystearate.

[0006] As a preferred embodiment, the fatty acid comprises a combination of myristic acid, palmitic acid, lauric acid, stearic acid and hydroxystearic acid. Preferably, the stearic acid is a stearic acid mixture, and the hydroxystearic acid is a hydroxystearic acid mixture.

[0007] As a preferred embodiment, the stearic acid mixture includes stearic acid and hydroxystearic acid in a weight ratio of 81:19; the hydroxystearic acid mixture includes glyceryl hydroxystearate and hydroxystearic acid in a weight ratio of 78.5:21.5.

[0008] As a preferred embodiment, the weight ratio of the myristic acid, palmitic acid, lauric acid, stearic acid mixture and hydroxystearic acid mixture is (10-14): (10-14); (6-10): (3-5): (0.3-1).

[0009] As a preferred embodiment, the weight ratio of the myristic acid, palmitic acid, lauric acid, stearic acid mixture and hydroxystearic acid mixture is 12:12:8:4:0.5.

[0010] As a preferred embodiment, the polyol is selected from at least one of glycerol, diglycerol, polyethylene glycol, PPG-polyether, propylene glycol, PPG-sorbitol, and butylated hydroxytoluene.

[0011] As a preferred embodiment, the polyol includes a combination of glycerol, diglycerol, a polyethylene glycol mixture, and a PPG-sorbitol mixture.

[0012] As a preferred embodiment, the polyethylene glycol mixture includes polyethylene glycol-6, PPG-24 glycerol polyether, PEG / PPG-25 / 30 copolymer, and propylene glycol in a weight ratio of 33:26:24:17. The PPG-sorbitol mixture includes PPG-10 sorbitol and butylated hydroxytoluene in a weight ratio of 99.9:0.1.

[0013] As a preferred embodiment, the weight ratio of the glycerol, diglycerol, polyethylene glycol mixture, and PPG-sorbitol mixture is (8-13): (8-13): (6-10): (1-3).

[0014] As a preferred embodiment, the weight ratio of the glycerol, diglycerol, polyethylene glycol mixture, and PPG-sorbitol mixture is 11:11:8:2.

[0015] As a preferred embodiment, the alkaline substance is selected from at least one of potassium hydroxide, sodium hydroxide, tromethamine and triethanolamine.

[0016] As a preferred embodiment, the alkaline substance is potassium hydroxide.

[0017] As a preferred embodiment, the weight ratio of the fatty acid, polyol and alkaline substance is (29.3-44): (23-39): (6-9.5).

[0018] As a preferred embodiment, the weight ratio of the fatty acid, the polyol and the alkaline substance is 36.5:32:7.7.

[0019] The applicant found during the experiment that a soap-based cleansing cream with a high fatty acid content can be prepared by using a weight ratio of fatty acids, polyols and alkali of (29-43): (23-39): (6-9.5), which has excellent cleaning experience, high foam richness and high product stability. The possible reasons are speculated to be: the existing products on the market have the problems of low fatty acid content, poor cleaning experience and low foam richness. The cleaning experience can be optimized by increasing the fatty acid content, but under high fatty acid content, a large amount of fatty acid salts generated are prone to agglomeration at high temperatures, resulting in failure of the saponification reaction. In addition, the high soap-based cleansing cream formed in the high fatty acid system will cause the material body to be hard after crystallization, which is not easy to use during cleaning. In this application, by optimizing the weight ratio of fatty acids, polyols and alkali, the hardness of the material body can be reduced while increasing the fatty acid content, avoiding the problem of the material body being too hard. The applicant further found that under the preferred weight ratio, the material body has high stability in high and low temperature environments and cyclic environments, and is not prone to stratification problems.

[0020] As a preferred embodiment, the skin conditioning agent comprises polyquaternium salt and allantoin, and the polymerization number of the polyquaternium salt is 6-40.

[0021] As a preferred embodiment, the polyquaternium salt includes a combination of polyquaternium-39, polyquaternium-7 mixture I, polyquaternium-6, and polyquaternium-7 mixture II.

[0022] As a preferred embodiment, the polyquaternium-7 mixture I comprises water, polyquaternium-7, sodium benzoate, and a weight ratio of 89.5:10:0.5. The polyquaternium-7 mixture II comprises water, polyquaternium-7, sodium benzoate, and citric acid, and a weight ratio of 56.7:42.7:0.3:0.3.

[0023] As a preferred embodiment, the cleaning agent is selected from at least one of sodium cocoyl methyl taurate, potassium cocoate, potassium palmitate, sodium laureth-6 carboxylate, and laureth-6 carboxylic acid.

[0024] As a preferred embodiment, the cleaning agent includes a combination of a sodium cocoyl methyl taurate taurate mixture, a potassium cocoate mixture, and a laureth-6 carboxylic acid mixture.

[0025] As a preferred embodiment, the weight ratio of the sodium cocoyl methyl taurate taurate mixture, the potassium cocoate mixture, and the laureth-6 carboxylic acid mixture is (2-4): (0.5-2): (0.3-1).

[0026] As a preferred embodiment, the sodium cocoyl methyl taurate taurate mixture includes water, sodium cocoyl methyl taurate taurate, and sodium chloride in a weight ratio of 73:26:1. The potassium cocoate mixture includes water, potassium cocoate, and sodium palmitate in a weight ratio of 66:26.5:7.5. The laureth-6 carboxylic acid mixture includes water, sodium laureth-6 carboxylate, and laureth-6 carboxylic acid in a weight ratio of 74:23.5:2.5.

[0027] The second aspect of the present invention provides a method for preparing a soap-based cleansing composition with a high fatty acid content, comprising the following steps:

[0028] S1: Add polyol into the oil phase pot and stir until the material is uniform;

[0029] S2 adds fatty acids into the oil phase pot, sets the temperature to 80-90°C, starts stirring and heating until the material is completely dissolved;

[0030] S3 Dissolve the alkaline substance in water in advance, set the temperature of the emulsifying pot to 72-78°C, start stirring, pump the raw materials from the oil phase pot into the emulsifying pot, and then pump the dissolved alkaline substance into the emulsifying pot. Raise the temperature of the emulsifying pot to 80-85°C, keep warm, stir, vacuum and defoam until the material is completely dissolved;

[0031] S4: add allantoin into the emulsifying pot, keep warm and stir until the material is completely dissolved, then cool the material to 60-65°C and keep warm for later use;

[0032] S5: Keep the temperature of the emulsifying pot at 60-65℃, start stirring and homogenizing, add the detergent into the emulsifying pot, and then continue stirring and homogenizing until the material is uniform, and vacuumize to defoam;

[0033] S6 emulsifier cools down to 50-55℃, adds polyquaternium salt into the emulsifier, and stirs until uniform;

[0034] Cool down the S7 emulsifier to 48-53℃, add the additive dissolved in water, and stir until uniform;

[0035] S8: Add the preservatives into the emulsifier and stir until uniform;

[0036] Cool down the S9 emulsifying pot to 40-43°C, keep warm and stir.

[0037] The third aspect of the present invention provides an application of a soap-based facial cleansing composition with a high fatty acid content, which is applied to a cleansing paste, a cleansing cream, and a cleansing milk.

[0038] As a preferred embodiment, the raw materials for preparing the cleansing cream also include at least one of a moisturizer, an emollient, a skin conditioner II, a filler, a fragrance, an adsorbent, a colorant, a skin feel regulator, an acne remover, a pH regulator, and an abrasive.

[0039] As a preferred embodiment, the moisturizing agent includes but is not limited to alcohol moisturizing agents, sugar moisturizing agents, and natural moisturizing factors.

[0040] As a preferred embodiment, the emollient includes but is not limited to plant extract oil, phytosterol, octyldodecyl lauroyl glutamate. Preferably, the plant extract oil is Limnanthes alba seed oil.

[0041] As a preferred embodiment, the skin conditioning agent II includes but is not limited to PCA zinc, bisabolol, volcanic mud, malachite extract, zinc gluconate, magnesium aspartate, copper gluconate, and Zingiber officinale root extract.

[0042] As a preferred embodiment, the filler includes but is not limited to kaolin.

[0043] As a preferred embodiment, the adsorbent includes but is not limited to carbon powder.

[0044] As a preferred embodiment, the skin feel regulator includes but is not limited to lactose, cellulose, hydroxypropyl methylcellulose, jojoba esters, tocopherol acetate, and ascorbyl palmitate.

[0045] As a preferred embodiment, the acne-removing agent includes but is not limited to salicylic acid.

[0046] As a preferred embodiment, the grinding agent includes but is not limited to walnut (JUGLANS REGIA) shell powder.

[0047] As a preferred embodiment, the fragrance includes but is not limited to MENTHA PIPERITA oil.

[0048] As a preferred embodiment, the colorant includes but is not limited to phytic acid and sodium hydroxide.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] (1) The soap-based cleansing composition with a high fatty acid content of the present invention adopts a fatty acid content of more than 35% in the system, which is a high fatty acid soap-based system. The stability of the high soap-based system is improved by adjusting the weight ratio of polyols, fatty acids, and alkaline substances.

[0051] (2) The soap-based cleansing composition with a high fatty acid content of the present invention can prepare a soap-based cleansing cream with a high fatty acid content by using a weight ratio of fatty acid, polyol and alkaline substance (29.3-44): (23-39): (6-9.5), which has excellent cleaning feeling, high foam richness and high product stability.

[0052] (3) The soap-based cleansing composition with a high fatty acid content of the present invention adopts an optimal weight ratio of fatty acid, polyol and alkaline substance, and controls the production process at the same time, thereby solving the shortcomings of the high soap-based system that agglomerates during the saponification process and the paste is hard and inconvenient to use after crystallization.

[0053] (4) The soap-based cleansing composition with a high fatty acid content of the present invention is used in a cleansing cream product, which has a high cleaning power, an excellent cleaning feeling, an excellent skin feel after washing, and improved foam richness.

[0054] (5) The soap-based cleansing composition with a high fatty acid content of the present invention is used in a cleansing cream product, has an appropriate needle penetration test value, is soft in texture, is easy to apply, and has high shaping performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 These are photos of the soap-based cleansing cream with a high fatty acid content prepared in Example 2 of the present application after stability testing, from left to right: after the -16°C test, after the 45°C test, after the cycle test, and after the room temperature test.

[0056] Figure 2 These are photos of the soap-based cleansing cream with a high fatty acid content prepared in Example 5 of the present application after stability testing, from left to right: after testing at 45°C, after testing at room temperature of 25°C, and after testing at 5°C.

[0057] Figure 3 These are photos of the soap-based cleansing cream with a high fatty acid content prepared in Example 8 of the present application after stability testing, from left to right: after testing at 5°C, after testing at room temperature 25°C, and after testing at 45°C.

[0058] Figure 4 This is the foam height test result diagram;

[0059] Figure 5 This is a picture of the foam height test process;

[0060] Figure 6 This is the foam diameter distribution diagram of commercially available product 1;

[0061] Figure 7 This is the foam diameter distribution diagram of commercially available product 2;

[0062] Figure 8 is the foam diameter distribution diagram of Example 1;

[0063] Fig. 9 This is the foam diagram of commercially available product 1;

[0064] Fig.10 This is the foam diagram of commercially available product 2;

[0065] Fig.11 This is the foam diagram of Example 1. DETAILED DESCRIPTION

[0066] Stearic acid mixture was purchased from Shanghai Hongdu Fine Chemical Co., Ltd., model SAPPCHEM 180K;

[0067] Hydroxystearic acid mixture was purchased from Hongdu Fine Chemical Co., Ltd., model SAPPCHEM EM60S;

[0068] The polyethylene glycol mixture was purchased from Hongdu Fine Chemical Co., Ltd., model SAPPCHEM TPG-98;

[0069] PPG-sorbitol mixture was purchased from Hongdu Fine Chemical Co., Ltd., model SAPPCHEM PGS;

[0070] Polyquaternium-39 was purchased from Lubrizol Advanced Materials, Inc. Model: MERQUAT TM 3330PRPOLYMER;

[0071] Polyquaternium-7 mixture I was purchased from Lubrizol Advanced Materials, Inc. Model: MERQUAT TM 550PR POLYMER;

[0072] Polyquaternium-6 was purchased from Lubrizol Advanced Materials, Inc. Model: MERQUAT TM 100POLYMER;

[0073] Polyquaternium-7 mixture II was purchased from Lubrizol Advanced Materials, Inc. Model: Merquat TM 740Polymer;

[0074] Sodium cocoyl methyl taurate taurate mixture was purchased from Dongbang Chemical (Shanghai) Co., Ltd., model number NEOSCOAP CDT-30-SF;

[0075] Potassium cocoate mixture was purchased from Shanghai Hongdu Fine Chemical Co., Ltd., model NAFOCLEA DCB-40M;

[0076] The laureth-6 carboxylic acid mixture was purchased from Kao (Shanghai) Chemical Co., Ltd., model number KAO AKYPO RLM-6N.

[0077] Example

[0078] A soap-based facial cleansing composition with a high fatty acid content, the raw materials for preparation are shown in Table 1 in terms of weight percentage:

[0079] Table 1

[0080]

[0081]

[0082]

[0083] A method for preparing a soap-based facial cleansing composition with a high fatty acid content comprises the following steps:

[0084] S1: Add polyol into the oil phase pot and stir until the material is uniform;

[0085] S2 adds fatty acids into the oil phase pot, sets the temperature to 85°C, starts stirring and heats until the material is completely dissolved;

[0086] S3 pre-dissolves the alkaline substance with water, sets the temperature of the emulsifying pot to 75°C, starts stirring, pumps the raw materials from the oil phase pot into the emulsifying pot, and then pumps the dissolved alkaline substance into the emulsifying pot. The temperature of the emulsifying pot is raised to 83°C, and the temperature is kept and stirred to vacuum and defoam until the material is completely dissolved;

[0087] S4: add allantoin into the emulsifying pot, keep warm and stir until the material is completely dissolved, then cool the material to 63°C and keep warm for later use;

[0088] S5: Keep the temperature of the emulsifying pot at 63°C, start stirring and homogenizing, add the detergent into the emulsifying pot, and then continue stirring and homogenizing until the material is uniform, and vacuumize to defoam;

[0089] S6 emulsifier cools down to 53°C, adds polyquaternium salt into the emulsifier, and stirs until uniform;

[0090] Cool down the S7 emulsifier to 50℃, add the additive dissolved in water, and stir until uniform;

[0091] S8: Add the preservatives into the emulsifier and stir until uniform;

[0092] The temperature of the S9 emulsifying pot is lowered to 42°C, and the mixture is stirred while maintaining the temperature.

[0093] Application Example 1

[0094] An application of a soap-based facial cleansing composition with a high fatty acid content is applied to a cleansing cream. The raw materials for the preparation are shown in Table 2 in terms of weight percentage:

[0095] Table 2

[0096]

[0097]

[0098]

[0099]

[0100] In the table: Skin conditioning agent (3) was purchased from Shanghai Huanqiu Industrial Development Co., Ltd., trade name Softcare PCA Zinc;

[0101] Skin feel regulator (4) was purchased from Shanghai Puen Biochemical Technology Co., Ltd., trade name PUENSOMES BLUE 01 30 / 40;

[0102] Skin conditioning agent (5) purchased from GATTEFOSSE SAS, trade name: MALA'KITE;

[0103] Kaolin (6) was purchased from Clariant Chemical Technology (Shanghai) Co., Ltd., trade name 1: BERACA LIGHT GREEN CLAY; trade name 2: AMAZONIAN WHITE CLAY;

[0104] Limnanthes alba seed oil (7) was purchased from Haimingsi (Shanghai) New Materials Co., Ltd., trade name: FANCOR SEED OIL;

[0105] Skin conditioning agent (9) was purchased from Dezhixin Flavors & Fragrances (Nantong) Co., Ltd., trade name: 100;

[0106] Peppermint oil (10) was purchased from Jiangmen Hexin Fragrance Technology Co., Ltd., trade name: BT404612;

[0107] Skin conditioning agent (11) purchased from SEPPIC SA, trade name: SEPITONIC M3;

[0108] Emollient (12) was purchased from Suzhou Yuansuji Chemical Industry Co., Ltd., trade name: Aminol SE-2;

[0109] Carbon powder (13) was purchased from Sensient Cosmetic Technologies, trade name: VEGETABLE CHARCOALPN94;

[0110] The colorant (14) is purchased from ROHA DYECHEM PVT.LTD, trade name: BRILLIANT BLUE FCF.

[0111] A method for preparing a soap-based facial cleansing composition with a high fatty acid content comprises the following steps:

[0112] S1: Add polyol into the oil phase pot and stir until the material is uniform;

[0113] S2 adds fatty acids into the oil phase pot, sets the temperature to 85°C, starts stirring and heats until the material is completely dissolved;

[0114] S3 pre-dissolves the alkaline substance with water, sets the temperature of the emulsifying pot to 75°C, starts stirring, pumps the raw materials from the oil phase pot into the emulsifying pot, and then pumps the dissolved alkaline substance into the emulsifying pot. The temperature of the emulsifying pot is raised to 83°C, and the temperature is kept and stirred to vacuum and defoam until the material is completely dissolved;

[0115] S4: add allantoin, acne remover, and skin conditioner (serial number 9) into the emulsifying pot, keep warm and stir until the materials are completely dissolved, then cool the materials to 63°C and keep warm for later use;

[0116] S5: Keep the temperature of the emulsifying pot at 63°C, start stirring and homogenizing, add the detergent, filler, moisturizer and adsorbent into the emulsifying pot, and then continue stirring and homogenizing until the material is uniform, and vacuumize to defoam;

[0117] S6 emulsifier cools down to 53°C, adds polyquaternium salt into the emulsifier, and stirs until uniform;

[0118] S7 adds the water-dissolved additives, fragrance, and skin conditioning agent (No. 3) and stirs until uniform;

[0119] S8: Add the preservative, skin conditioner (serial number 5), emollient (serial number 7), skin conditioner (serial number 11), emollient (serial number 12), and colorant into the emulsifying pot, and stir until uniform;

[0120] S9 maintains the emulsification pot temperature at 53°C and adds a pH regulator to adjust the pH;

[0121] Cool down the S10 emulsifying pot to 38°C, add the skin feel regulator, and stir until evenly dispersed;

[0122] S11 Filling, packaging and inspection are qualified.

[0123] Application Example 2

[0124] An application of a soap-based facial cleansing composition with a high fatty acid content is applied to a cleansing cream. The raw materials for preparation are shown in Table 3 in terms of weight percentage:

[0125] Table 3

[0126]

[0127]

[0128]

[0129]

[0130] In the table: walnut shell powder (2) was purchased from Beijing Weiyou Century Technology Co., Ltd., trade name: WALNUT SHELL7037;

[0131] Skin conditioning agent (4) was purchased from Shanghai Huanqiu Industrial Development Co., Ltd., trade name: Softcare PCA Zinc;

[0132] Colorant (5) purchased from Sensient Cosmetic Technologies, trade name: UNIPURE RED LC388PHY;

[0133] Volcanic mud (6) was purchased from MATERRA Inc., trade name: MATERRA POWDER;

[0134] Limnanthes alba seed oil (7) was purchased from Haimingsi (Shanghai) New Materials Co., Ltd., trade name: FANCOR SEED OIL;

[0135] Skin conditioning agent (9) was purchased from Dezhixin Flavors & Fragrances (Nantong) Co., Ltd., trade name: 100;

[0136] Peppermint oil (11) was purchased from Jiangmen Hexin Fragrance Technology Co., Ltd., trade name: BT404612;

[0137] Carbon powder (12) was purchased from Sensient Cosmetic Technologies, trade name: VEGETABLE CHARCOALPN94;

[0138] Skin conditioning agent (13) purchased from SEPPIC SA, trade name: SEPITONIC M3;

[0139] Phytosterol / octyldodecanol lauroyl glutamate (14) was purchased from Suzhou Yuansuji Chemical Industry Co., Ltd., trade name: Aminol SE-2.

[0140] A method for preparing a soap-based facial cleansing composition with a high fatty acid content comprises the following steps:

[0141] S1: Add polyol into the oil phase pot and stir until the material is uniform;

[0142] S2 adds fatty acids into the oil phase pot, sets the temperature to 85°C, starts stirring and heats until the material is completely dissolved;

[0143] S3 pre-dissolves the alkaline substance with water, sets the temperature of the emulsifying pot to 75°C, starts stirring, pumps the raw materials from the oil phase pot into the emulsifying pot, and then pumps the dissolved alkaline substance into the emulsifying pot. The temperature of the emulsifying pot is raised to 83°C, and the temperature is kept and stirred to vacuum and defoam until the material is completely dissolved;

[0144] S4: add allantoin, acne remover, and skin conditioner (serial number 9) into the emulsifying pot, keep warm and stir until the materials are completely dissolved, then cool the materials to 63°C and keep warm for later use;

[0145] S5: Keep the temperature of the emulsifying pot at 63°C, start stirring and homogenizing, add the cleanser, skin conditioner (No. 6), moisturizer, and adsorbent into the emulsifying pot, and then continue stirring and homogenizing until the material is uniform, and vacuumize to defoam;

[0146] S6 emulsifier cools down to 53°C, adds polyquaternium salt into the emulsifier, and stirs until uniform;

[0147] S7 adds the water-dissolved additives, fragrance, colorant (serial number 10), skin conditioner (serial number 4), and fragrance, and stirs until uniform;

[0148] S8: Add preservative, colorant (serial number 5), skin conditioner (serial number 13), and emollient (serial number 14) into the emulsifying pot and stir until uniform;

[0149] S9 maintains the emulsification pot temperature at 53°C and adds a pH regulator to adjust the pH;

[0150] Cool down the S10 emulsifying pot to 38°C, add the grinding agent, and stir until it is evenly dispersed;

[0151] S11 Filling, packaging and inspection are qualified.

[0152] Performance Testing

[0153] 1. Stability test:

[0154] The soap-based facial cleansing composition with a high fatty acid content prepared in Example 2 was subjected to an accelerated stability test. The test results are shown in Table 4 and the pictures are shown in Figure 1 In the figure: from left to right, they are the stability after -16℃ test, 45℃ test, cycle test, and room temperature test.

[0155] Table 4

[0156]

[0157]

[0158] The soap-based cleansing composition with a high fatty acid content prepared in Example 5 was applied to a cleansing cream and subjected to an accelerated stability test. The test results are shown in Table 5. The cleansing cream in Example 5 has a blue paste appearance with blue particles and pearlescent luster. Figure 2 .

[0159] The facial cleansing cream of Example 5 was stored for 3 months at -15°C, 5°C, 25°C, 45°C, 50°C, and cold and hot cycles (-15°C to 25°C to 45°C, one cycle every three days). A portion of each sample was taken immediately after preparation, 1 month later, 2 months later, and 3 months later, and the appearance was observed after returning to room temperature.

[0160] Table 5

[0161]

[0162]

[0163] The soap-based cleansing composition with a high fatty acid content prepared in Example 8 was applied to a cleansing cream and subjected to an accelerated stability test. The test results are shown in Table 6. The cleansing cream in Example 8 has a red paste with pearlescent luster. Figure 3 .

[0164] The facial cleansing cream of Example 5 was stored for 3 months at -15°C, 5°C, 25°C, 45°C, 50°C, and cold and hot cycles (-15°C to 25°C to 45°C, one cycle every three days). A portion of each sample was taken immediately after preparation, 1 month later, 2 months later, and 3 months later, and the appearance was observed after returning to room temperature.

[0165] Table 6

[0166]

[0167] 2. Needle penetration test:

[0168] (1) Sample preparation: Cut or melt the solid sample (such as soap, wax) and pour it into a standard mold to ensure that the sample surface is flat. Soap-based cleansing creams can be sampled directly. The sample is cooled to room temperature and then equilibrated in a constant temperature water bath at 25°C for 1 hour.

[0169] (2) Needle penetration test: Adjust the needle penetration tester to a horizontal state. Place the prepared sample on the tester platform. Place a standard needle vertically on the sample surface, making sure that the needle tip touches the sample surface. Under the action of a constant load (100 grams), allow the needle to fall freely in the sample for 5 seconds. Record the depth of the needle into the sample in millimeters (mm). Repeat the test, test each sample three times, and take the average value as the final needle penetration. The test results are shown in Table 7. The smaller the needle penetration, the harder the material and the lower the plasticity; the larger the needle penetration, the softer the material and the higher the plasticity.

[0170] Table 7

[0171]

[0172]

[0173]

[0174] 3. Foam height test: Refer to the "Foam Particle Size Measurement-Standard Operating Procedure 2023" standard to test the foam height of the product. The test results are shown in Table 8 and the bar chart is shown in Figure 4 , pictures of the testing process are shown in Figure 5 , in the figure: A: commercially available product 1; B: commercially available product 2; C: Example 1.

[0175] Table 8

[0176]

[0177] Conclusion: Among the three products, Example 1 has the highest initial foam height, followed by Commercial Product 1, and the lowest is Commercial Product 2. The foam stability of the three products is good, and the foam height hardly changes within 0 to 15 minutes.

[0178] 4. Foam size test: Refer to the "Foam Particle Size Measurement-Standard Operating Procedure 2023" standard to test the foam size of the product. The test results are shown in Table 9 and the foam diameter distribution diagram is shown in Figure 6-8 , Figure 6 : Commercially available product 1; Figure 7 : Commercially available product 2; Figure 8 :Example 1. Foam diagram see Figure 9-11 , Fig. 9 : Commercially available product 1; Fig.10 : Commercially available product 2; Fig.11 :Example 1.

[0179] Table 9

[0180]

[0181]

[0182] Conclusion: There is no significant difference in the foam diameter results between the commercial product 1 and Example 1, that is, the distribution of the foam diameters of the two is relatively the same; the commercial product 2 has significant differences compared with the other two;

[0183] ② The diameters of the foams are as follows: Commercially available product 2 (105.74 μm) > Commercially available product 1 (75.51 μm) ≈ Example 1 (77.65 μm).

Claims

1. A soap-based facial cleansing composition with a high fatty acid content, characterized in that: The raw materials for preparation include, by weight percentage, 25-45% fatty acid, 20-40% polyol, 5-10% alkaline substance, 3-8% skin conditioner, 2-7% detergent, 0.01-0.1% auxiliary agent, 0.5-0.8% preservative, and water is added to 100%.

2. The soap-based facial cleansing composition with a high fatty acid content according to claim 1, characterized in that: The fatty acid is selected from at least one of myristic acid, palmitic acid, lauric acid, stearic acid, hydroxystearic acid, and glyceryl hydroxystearate.

3. The soap-based facial cleansing composition with a high fatty acid content according to claim 1, characterized in that: The polyol is selected from at least one of glycerol, diglycerol, polyethylene glycol, PPG-polyether, propylene glycol, PPG-sorbitol, and butylated hydroxytoluene.

4. The soap-based facial cleansing composition with a high fatty acid content according to claim 1, characterized in that: The alkaline substance is selected from at least one of potassium hydroxide, sodium hydroxide, tromethamine and triethanolamine.

5. The soap-based facial cleansing composition with a high fatty acid content according to claim 1, characterized in that: The weight ratio of the fatty acid, polyol and alkaline substance is (29.3-44): (23-39): (6-9.5).

6. The soap-based facial cleansing composition with a high fatty acid content according to claim 1, characterized in that: The skin conditioning agent comprises polyquaternium salt and allantoin, wherein the polymerization number of the polyquaternium salt is 6-40.

7. The soap-based facial cleansing composition with a high fatty acid content according to claim 1, characterized in that: The cleaning agent is selected from at least one of sodium cocoyl methyl taurate, potassium cocoate, potassium palmitate, sodium laureth-6 carboxylate, and laureth-6 carboxylic acid.

8. A method for preparing the soap-based cleansing composition with a high fatty acid content according to any one of claims 6 to 7, characterized in that: The following steps are involved: S1: Add polyol into the oil phase pot and stir until the material is uniform; S2 adds fatty acids into the oil phase pot, sets the temperature to 80-90°C, starts stirring and heating until the material is completely dissolved; S3 Dissolve the alkaline substance in water in advance, set the temperature of the emulsifying pot to 72-78°C, start stirring, pump the raw materials from the oil phase pot into the emulsifying pot, and then pump the dissolved alkaline substance into the emulsifying pot. Raise the temperature of the emulsifying pot to 80-85°C, keep warm, stir, vacuum and defoam until the material is completely dissolved; S4: add allantoin into the emulsifying pot, keep warm and stir until the material is completely dissolved, then cool the material to 60-65°C and keep warm for later use; S5: Keep the temperature of the emulsifying pot at 60-65℃, start stirring and homogenizing, add the detergent into the emulsifying pot, and then continue stirring and homogenizing until the material is uniform, and vacuumize to defoam; S6 emulsifier cools down to 50-55℃, adds polyquaternium salt into the emulsifier, and stirs until uniform; Cool down the S7 emulsifier to 48-53℃, add the additive dissolved in water, and stir until uniform; S8: Add the preservatives into the emulsifier and stir until uniform; Cool down the S9 emulsifying pot to 40-43°C, keep warm and stir.

9. An application of the soap-based facial cleansing composition with a high fatty acid content according to any one of claims 1 to 7, characterized in that: Used in cleansing paste, cleansing cream and cleansing milk.

10. The use of the soap-based facial cleansing composition with a high fatty acid content according to claim 9, characterized in that: The raw materials for preparing the cleansing cream also include at least one of a moisturizer, an emollient, a skin conditioner II, a filler, a fragrance, an adsorbent, a colorant, a skin feel regulator, an acne remover, a pH regulator, and an abrasive.

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