Preparation method of short-rheology amino acid composite cleaning system bath mud

Abstract

A short rheological amino acid composite cleaning system bath mud preparation method, comprising the following steps: S1: preparing A phase; S2: preparing B phase; S3: preparing C phase; S4: preparing D phase; S5: preparing E phase. Through the preparation method of the application, it is not necessary to add excessive alcohol raw material components to reduce the production of soap blocks, reduce the skin irritation, and also reduce the production of soap blocks. The application adopts a specific process preparation method, selects a specific network structure of carbo U21 and optimizes the process treatment in preparation, and it is accidentally found that the reaction of semi-swollen carbo U21 and surfactant can prevent the formation of transparent gel particles, and then other raw material components can be stably suspended in the network structure, enhancing the stability.

Description

Technical Field

[0001] This invention relates to the field of daily cosmetics, and in particular to a method for preparing a short-rheological amino acid composite cleansing mud. Background Technology

[0002] In recent years, with the improvement of people's daily lives, shower gel has gradually replaced soap. Because shower gel is more convenient and safer to use, users are increasingly choosing it when showering. Previously, shower gel products on the market generally only had cleansing and antibacterial effects. However, nowadays, people have higher and higher requirements for the comfort of shower gel, which places increasingly higher demands on formulation engineers: rich lather, good cleaning power, high gentleness, and a more refreshing skin feel after showering. Currently, in terms of shower gel formulation technology, there are two main types of formulation systems, and both types have their drawbacks. The first type is a surfactant-based shower gel, composed of anionic surfactants, primarily sulfates such as lauryl ether sulfate and lauryl sulfate, along with other acceptable components. Its disadvantages include a strong residue feeling after showering and tightness after washing. The second type is a saponified shower gel, composed of a soap base formed by saponification of fatty acids and potassium hydroxide or sodium hydroxide, along with other acceptable components. Saponified shower gels are prone to soap clumps during the saponification process. The formation of soap clumps affects the solubility of fatty acid salts in water. Existing shower gels often incorporate polyols into the soap base system. Experimental studies have shown that the addition of glycerin increases the viscosity of the soap base system at zero shear rate and increases its yield strength, indicating that glycerin enhances the shear stability and resistance of the soap base system. This is because the addition of glycerin alters the properties of the solvent, strengthening the hydrogen bonding between the solvent and fatty acid salt molecules, macroscopically resulting in increased system viscosity. Furthermore, the addition of glycerin and other alcohols expands the micelle phase range, increasing the stability of the soap base system. However, to prevent soap clump formation through the dispersion effect of alcohols, excessive amounts of alcohols are required. Increased alcohol content can irritate the skin and reduce the foaming properties of the shower gel. Moreover, soap-based shower gels also suffer from the problem of difficulty in thickening the formula, resulting in a tight feeling on the skin after showering.

[0003] On the other hand, in terms of the texture of shower gels, most of the products on the market are medium- to long-term rheological liquids with a certain viscosity or foaming agents without viscosity, resulting in serious homogenization. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a method for preparing a short-rheological amino acid composite cleaning system bath mud.

[0005] The technical solution adopted by one embodiment of the present invention to solve its technical problem is as follows:

[0006] A method for preparing a short-rheological amino acid composite cleaning system bath mud includes the following steps:

[0007] S1: To prepare phase A, carbopol U21 was dispersed in water, kept warm, stirred and sheared until it formed uneven semi-permeable gel particles without agglomerates, and then homogenized until it was hydrated into a uniform semi-transparent gel. It was then cooled and set aside.

[0008] S2: To prepare phase B, add coconut oil and palm oil to mixing vessel A and heat to 80-85℃; add water and potassium hydroxide to mixing vessel B, stir until dissolved and heated to 80-85℃; add the solution dissolved in mixing vessel B to mixing vessel A, stir at 80-85℃ until the solution becomes a colorless to pale yellow transparent liquid, adjust the pH to 10-10.5, and cool for later use.

[0009] S3: To prepare phase C, disodium EDTA, allantoin, glycerol, sodium cocoyl glutamate, sodium lauryl ether sulfate, sodium methyl cocoyl taurate, sodium lauroyl sarcosinate, decyl glucoside, and disodium cocoamphodiacetate were added to mixing vessel C and stirred until homogeneous. Then, phase B was added to mixing vessel C and stirred until homogeneous under vacuum.

[0010] S4: To prepare phase D, divide aminomethylpropanol into two parts. Mix one part with phase A and stir evenly to make phase A in a semi-neutralized state. Then add phase A into phase C and stir evenly. Then add the other part of aminomethylpropanol and stir evenly at a rate of 10 r / min.

[0011] S5: To prepare phase E, mix zinc pyrithione, Amazonian white mud, and water evenly, then add them to mixing pot C and mix evenly. Then add water, sugar isomers, citric acid, sodium citrate, water, polyquaternium-22, and sodium benzoate and stir until uniform. Adjust the pH to 7.5-8. Stop stirring, apply vacuum, and discharge the material after verifying that the material indicators are qualified.

[0012] Preferably, in S1, the shear rate of Carbopol U21 is 1000-2000 r / min.

[0013] Preferably, in S1, the stirring temperature of Carbopol U21 is controlled at 65-70℃.

[0014] Preferably, in S3, the vacuuming time is 3-5 min and the stirring speed is 3-5 r / min.

[0015] The beneficial effects of this invention are:

[0016] 1. The preparation method described in this application does not require the addition of excessive alcohol raw materials to reduce soap clumping, thus reducing skin irritation and soap clumping. This application employs a specific preparation process, selecting the specific network structure of Carbopol U21 and optimizing its processing. Unexpectedly, it was discovered that the semi-swollen state of Carbopol U21 reacts with surfactants to prevent agglomeration into transparent gel particles. This allows other raw materials to remain stably suspended within the network structure, enhancing its stability. Because Carbopol U21 retains its inherent three-dimensional network structure during processing, the viscosity of the bath mud produced in this application remains stable.

[0017] 2. The bath mud of this application can improve the residual feeling of traditional surfactant-based shower gels, reduce the stickiness left on the skin after washing, and relieve the tightness of the skin.

[0018] 3. The bath mud of this application has a special mud-like appearance, providing users with a unique user experience. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a diagram showing the state of sample 1 during the stability test.

[0021] Figure 2 This is a diagram showing the state of sample 2 during the stability test.

[0022] Figure 3 This is a diagram showing the state of sample 3 during the stability test. Detailed Implementation

[0023] Detailed descriptions of the embodiments are essential for fully disclosing, understanding, and reproducing the invention, and for supporting and interpreting the claims. The description of the embodiments should be consistent with the technical solution adopted to solve the technical problem. For simple technical solutions, only one embodiment may be given; for technical solutions with a broad scope of protection, more than one embodiment should be given to support the scope of protection claimed.

[0024] Table 1. Example of formulation for Example 1

[0025]

[0026] The total mass of all the above ingredients is 100g.

[0027] Preparation method:

[0028] Step 1: Preparation of Phase A

[0029] Pretreatment of Carbopol U21 (Phase A): Disperse Carbopol U21 in 35-50g of water, heat to 65-70℃, and stir for 20-30min to fully wet the Carbopol U21. At this point, the mixture of Carbopol U21 and water will appear as uneven, semi-transparent gel particles without white agglomerates. Then, start a homogenizer and adjust the speed to 1000-2000r / min. Through high-speed shearing, the Carbopol U21 will be completely hydrated. At this point, the pre-prepared solution will be a homogeneous, semi-transparent gel. Cool and set aside.

[0030] Step 2: Preparation of Phase B

[0031] Add palm oil to mixing vessel A and heat to 80-85℃. In mixing vessel B, first add water, then add potassium hydroxide, stir until dissolved, and heat to 80-85℃. Add the liquid from mixing vessel B to mixing vessel A, maintain the temperature at 80-85℃ and stir for 30-40 minutes, until the solution becomes a colorless to pale yellow transparent liquid. Finally, adjust the pH to 10-10.5. Cool and set aside.

[0032] Step 3: Mix all components of phase C in production pot C, start stirring, adjust the speed to 15-16 r / min, and stir until the material is evenly dissolved. Stop stirring, add the pre-prepared phase B component from step 2 to the pot according to the proportions in this formula, then start stirring again, reduce the stirring speed to 3-5 r / min, and activate vacuum for 3-5 minutes to remove any foam generated during stirring.

[0033] Step 4: Mix half of the amount of aminomethylpropanol in phase D with the pre-prepared phase A, stir manually until the phase A is in a semi-neutralized state, then put phase A into pot C and stir at a stirring rate of 10 r / min for 10 min. Then add the remaining phase D and stir at a rate of 10 r / min until the mixture is homogeneous.

[0034] Step 5: First, mix the E phase components and disperse them by hand. Then, add them to pot C and stir at a speed of 10 r / min until they are evenly dispersed. Reduce the stirring speed to 3-5 r / min and add the F phase components to pot C one by one. Then, increase the speed to 10 r / min and keep stirring for 30 minutes until the material is evenly mixed. Measure the pH and control the final pH at 7.5-8. Then, stop stirring and start vacuuming for 10-15 minutes to accelerate defoaming. After the material's viscosity, appearance, odor, and other physicochemical indicators pass the inspection, discharge the material, let it stand, report for inspection, and wait for filling.

[0035] The design concept of Step 1 is as follows: 1. Controlling the temperature at 65-70℃ can accelerate the wetting and dispersion of Carbopol U21. Too low a temperature will significantly prolong the process time, while too high a temperature will increase energy consumption and lengthen the subsequent cooling time. 2. Accelerating the hydration and dispersion of Carbopol U21 through shear action shortens the process time. Simultaneously, if Carbopol U21 is not fully hydrated and swollen in this step, transparent Carbopol gel particles will easily appear when added to a surfactant-containing solution, and will not easily disperse and dissolve during subsequent stirring, affecting the stability of the formulation. 3. A shear rate of 1000-2000 r / min can quickly break up the Carbopol agglomerates, increasing the rate of Carbopol hydration and swelling. Too high a rotation speed will introduce more air bubbles and also damage the Carbopol network structure.

[0036] Step Two Design Concept: 1. The solutions in mixing pots A and B need to be heated to 80-85℃ respectively before mixing. Otherwise, the system temperature will be too low during mixing, resulting in soap lumps and excessively long preparation time. 2. During the mixing of raw materials in the two pots, the aqueous phase needs to be quickly added to the oil phase while maintaining the temperature and stirring. Otherwise, soap lumps will also form. 3. Maintain the temperature and stirring time for 30-40 minutes, and visually confirm that the material has turned colorless to pale yellow and transparent. Otherwise, incomplete saponification will occur, affecting product quality. 4. Potassium cocoylate and potassium palmitate are pre-prepared materials and need to be prepared in advance during production. Adjusting the pH to 10-10.5 can effectively maintain the stability of the material and inhibit the growth of microorganisms. No additional preservatives are needed to achieve a longer shelf life.

[0037] The design rationale for Step 3 is as follows: 1. This step can be done cold-mixing, reducing energy consumption during production. 2. When adding Phase B, stirring should be stopped first to avoid generating a large number of bubbles. 3. The stirring speed needs to be reduced during the vacuuming process. Too high a speed will actually lead to more bubble generation. Maintaining a low stirring speed increases the efficiency of defoaming, allowing bubbles in the lower layer of the pot to rise and burst more quickly. 4. The vacuuming operation in this step is crucial. If many bubbles remain in Step 3, it will be difficult to defoam after adding Carbopol in Step 5, directly affecting the appearance and quality of the material, and also affecting whether the actual filling volume meets the specifications.

[0038] The design concept for step four is as follows: 1. The Carbomer in phase A is kept in a semi-neutralized state. This serves two purposes: firstly, it prevents the consistency of phase A from becoming too high, which would affect the efficiency of feeding; secondly, it keeps the Carbomer in phase A in a semi-swollen state, with its network structure partially open. This prevents it from easily agglomerating into transparent gel particles when encountering the surfactant solution, thus ensuring dispersion. After feeding is complete, the remaining alkali is added for complete neutralization, allowing the Carbomer to fully swell and its network structure to open, providing suspension stability. 2. The stirring rate in this step should not be too high. Excessive stirring speed will introduce a large number of air bubbles, making them difficult to eliminate in subsequent steps.

[0039] Step 5 Design Considerations: Phase E must be pre-dispersed with water before being added; otherwise, uneven dispersion will easily occur, leading to a rough surface and affecting system stability. The stirring speed should be reduced during addition to avoid generating excessive bubbles. 1. The pH needs to be controlled within the range of 7.5-8. A pH that is too high will result in a dry feel after washing. A pH below 7 will cause amino acid surfactants to precipitate and crystallize, and potassium cocoate and potassium palmitate will become unstable, resulting in a rough texture and significantly affecting the product's foaming performance, post-wash feel, and appearance. 2. During the final vacuum stage, stirring must be stopped because the consistency and suspension of the material have increased at this point. Simultaneous vacuuming and stirring will not effectively defoam.

[0040] Table 1. Stability Experiment of Bath Mud Formula

[0041]

[0042] The above experimental results show that Figure 1 The samples numbered A, B, and C, arranged from left to right, represent the sample state of sample 1 after 3 months of heat resistance testing at 45℃. Sample B represents the sample state of sample 1 after 3 months at room temperature, and sample C represents the sample state of sample 1 after 3 months of cold resistance testing at 5℃. (This is in conjunction with Table 1 above.) Figure 1 It can be seen that Sample 1 (i.e. Example 1 of this application) showed no abnormalities in centrifugation test, 45℃ heat resistance test, 5℃ cold resistance test and room temperature test, and has excellent stability.

[0043] Figure 2 The samples numbered A1, B1, and C1, arranged from left to right, represent the state of sample 2 after three months of heat resistance testing at 45℃. B1 represents the state of sample 2 after three months at room temperature, and C1 represents the state of sample 2 after three months of cold resistance testing at 5℃. (This is in conjunction with Table 1 above.) Figure 2 It can be seen that in the 45℃ heat resistance test, the surface of sample 2 became rough in the second week; and in the room temperature test, the surface of the sample became rough in the second month. Therefore, it can be seen that the stability of sample 2's bath mud is not up to standard.

[0044] Figure 3 The samples numbered A2, B2, and C2, arranged from left to right, represent the state of sample 3 during the first week of the 45℃ heat resistance test. B2 represents the state of sample 3 after one month at room temperature, and C1 represents the state of sample 3 after two months at room temperature. (This is in conjunction with Table 1 and...) Figure 3 It can be seen that sample 3 exhibited stratification during the centrifugation test, and also showed stratification in both the 45℃ heat resistance test and the room temperature test. Sample 3 also showed discoloration, which is due to the uneven dispersion of ZPT-48 and fragrance in the system, leading to precipitation. Therefore, it is evident that the stability of the bath mud in sample 3 is not up to standard.

[0045] The preparation method described in this application eliminates the need for excessive amounts of alcohol raw materials to reduce soap clumping, thus reducing skin irritation and soap clumping. Reduced soap clumping increases the uniformity of other raw material components and improves the stability of the bath mud. This application provides a short-rheological bath mud that, in addition to having a natural mud-like appearance, exhibits a short-rheological state when poured from a container, facilitating user handling and preventing stringiness. This application offers a texture distinct from homogenized shower gels on the market; its short-rheological texture is closer to that of mud.

[0046] This application creatively optimizes the processing technology of Carbopol U21 to reduce damage to the Carbopol network structure; it creatively utilizes the reaction of semi-swollen Carbopol with surfactants to prevent agglomeration into transparent gel particles, allowing the Carbopol U21 network structure to open up and providing a stabilizing effect. Through the interlocking of the above processes, the prepared bath mud has the advantages of being non-sticky after washing, having good foaming performance, and good stability.

[0047] This application also conducted parallel experiments using Carbopol 940 and Carbopol U20 as alternatives to Carbopol U21. The experiments revealed that when Carbopol 940 was used, it was incompatible with the system, failing to thicken and exhibiting stratification stability issues. In the Carbopol U20 substitution experiment, it was found that increasing the amount of Carbopol U20 resulted in a highly viscous, lumpy bath mud that was difficult to squeeze out of containers and spread on the skin, and had a sticky feel. Decreasing the amount resulted in medium- to long-term rheological properties, making it impossible to produce a mud-like, short-rheological bath mud. Using Carbopol U21 in the above preparation method, this application found that the increase in consistency was more gradual; even with a wide range of additions, the consistency did not increase significantly. However, the suspending force increased with increasing Carbopol U21 addition, making the consistency easier to control and simplifying the production process.

[0048] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the invention without departing from the principles and spirit of the invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for illustrative purposes only and is not intended to limit the invention; rather, the scope of protection is defined by the content of the claims.

Claims

1. A method for preparing a short rheology amino acid complex cleaning system bath mud, characterized by, The method comprises the following steps: S1: preparing phase A, dispersing carbopol U21 in water, and stirring and shearing under heat until it becomes uneven semi-transparent gel particles without agglomerates, then homogenizing until the water is hydrated into a uniform semi-transparent gel, and cooling for standby; S2: preparing phase B, putting coconut oil and palm oil into an A stirring pot, and heating to 80-85℃; adding water and potassium hydroxide into a B stirring pot, stirring until dissolved and uniform, and heating to 80-85℃; adding the uniformly dissolved solution in the B stirring pot into the A stirring pot, stirring at 80-85℃ until the solution becomes a colorless to light yellow transparent liquid, adjusting the PH to 10-10.5, and cooling for standby; S3: preparing phase C, adding EDTA disodium, allantoin, glycerol, sodium cocoyl glutamate, sodium laureth sulfate, sodium methyl cocoyl taurate, sodium lauroyl methyl amino acetate, decyl glucoside, and disodium cocoampho diacetate into a C stirring pot, stirring until uniform, then adding phase B into the C stirring pot and stirring until uniform under vacuum; S4: preparing phase D, dividing aminomethyl propanol into two parts, mixing one part with phase A to make phase A semi-neutralized, then adding phase A into phase C and stirring until uniform, then adding the other part of aminomethyl propanol and stirring until uniform at a speed of 10r / min; S5: preparing phase E, stirring zinc pyrithione, Amazon white clay, and water until uniform, then adding into the C stirring pot and stirring until uniform; adding water, sugar isomer, citric acid, sodium citrate, polyquaternium-22, and sodium benzoate and stirring until uniform; adjusting the PH to 7.5-8; stopping stirring, vacuumizing, and checking the material indexes, and discharging when the indexes are qualified.

2. A method for preparing a short rheology amino acid complex cleaning system bath mud according to claim 1, characterized by, In S1, the shearing speed of carbopol U21 is 1000-2000r / min.

3. The method for preparing a short-rheological amino acid composite cleaning system bath mud according to claim 1, characterized in that, In S1, the stirring temperature of carbopol U21 is controlled at 65-70℃.

4. The method for preparing a short-rheological amino acid composite cleaning system bath mud according to claim 1, characterized in that, In S3, the vacuumizing time is 3-5min, and the stirring speed is 3-5r / min.

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