A shower gel with stable suspended pearl effect and its preparation method

Abstract

The application discloses a shower gel with stable suspended pearl luster effect and a preparation method thereof, and relates to the technical field of daily chemical products. The shower gel with stable suspended pearl luster effect is composed of the following components in percentage by weight: 8-15% of plant oil; 35-40% of anionic surfactant; 3.5-8% of non-ionic surfactant; 2-4% of amphoteric surfactant; 6-8% of alcohol; 3-5% of salt; 0.5-1.5% of chelating agent; and the balance of water; wherein the plant oil is composed of sunflower seed oil, soybean oil and shea butter. The shower gel can present pearl luster effect through the compounding of a surfactant system, alcohol, salt and the plant oil compounding component of the application, and the pearl luster crystal has excellent thermal stability, has the effects of nourishing, moisturizing and lubricating the skin, can realize stable suspension of the pearl luster crystal and solve the problem of easy stratification of high content plant oil in the product.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products technology, and in particular to a shower gel with a stable suspended pearlescent effect. Background Technology

[0002] Pearlizing agents can be used in the formulation of shampoos, bath gels, moisturizers, and other daily chemical products to produce a noticeable pearlescent effect. The main components of pearlizing agents include ethylene glycol diester stearate (EGDS) and ethylene glycol monoester stearate (EGMS), which can dissolve or emulsify in a surfactant complex upon heating. During cooling, they precipitate lens-like crystals, thus producing a pearlescent luster. For example, patent CN101631531A discloses a pearlescent composition containing ethylene glycol fatty acid esters and water. Patent CN113088406A discloses a composite surfactant with a pearlescent effect, whose raw materials are deionized water, ethylene glycol distearate, ethylene glycol monostearate, sodium fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether, and phenoxyethanol. Therefore, pearlizing agents are often added to high-end liquid daily chemical products to give tea a pearlescent effect, thereby enhancing the product's grade.

[0003] To create a pearlescent effect in daily chemical products, there are other ways besides adding pearlescent agents. For example, patent CN1638721A discloses a pearlescent composition that includes at least one surfactant, at least one cyclodextrin or a derivative thereof, in a concentration sufficient to give the composition a pearlescent color.

[0004] Further research revealed that specific surfactant blends can also induce pearlescent crystals in daily chemical products by controlling the surfactant composition, content, and preparation process. However, pearlescent crystals produced through specific surfactant blends typically have the following problems: 1. Pearlescent crystals have a high density and tend to settle to the bottom of liquid daily chemical products; 2. Pearlescent crystals have poor thermal stability and easily dissolve and dissipate at higher temperatures. Summary of the Invention

[0005] The purpose of this invention is to develop a shower gel with a stable suspended pearlescent effect and a high plant oil content. This technology is based on the plant oil system with excellent moisturizing effects disclosed in the applicant's prior patent application CN114533603 B, without adding pearlescent agents. It solves the problems of easy sedimentation, poor thermal stability, and easy stratification due to the high plant oil content in the aforementioned specific surfactant compound system. The specific solution is as follows.

[0006] A shower gel with a stable suspended pearlescent effect is provided, comprising the following ingredients by weight percentage:

[0007]

[0008] The remainder is water;

[0009] The anionic surfactant is at least one of fatty alkyl sulfosuccinate and fatty alkyl sulfosuccinamide salt;

[0010] The nonionic surfactant is selected from ethoxylated / propoxylated fatty amine surfactants or ethoxylated / propoxylated alkylolamide surfactants, and its content does not exceed 20% of the anionic surfactant content.

[0011] The amphoteric surfactant is composed of a combination of betaine-type surfactant and amine oxide-type surfactant;

[0012] The vegetable oil is composed of sunflower seed oil, soybean oil and avocado oil, with a weight ratio of sunflower seed oil, soybean oil and avocado oil of 1:(0.1-2):(0.1-2).

[0013] The alcohols mentioned are selected from xylitol and sorbitol;

[0014] The salts mentioned are a mixture of organic and inorganic salts.

[0015] Preferably, the anionic surfactant is selected from at least one of disodium dodecyl sulfosuccinate and disodium octadecyl sulfosuccinate.

[0016] Preferably, the nonionic surfactant is selected from at least one of fatty amine polyoxyethylene ether, fatty amine polyoxypropylene ether, PEG-11 cocoamide, PEG-3 lauramide, PEG-4 stearamide, and PPG-2 cocoamide.

[0017] Preferably, the content of the nonionic surfactant is 10-15% of the content of the anionic surfactant.

[0018] Preferably, the betaine-type surfactant is selected from one of alkyl betaine, alkylamide betaine, and alkyl sulfobetaine, such as hexadecyl betaine, hexadecylamide betaine, and hexadecyl sulfobetaine; the amine oxide-type surfactant is alkyl dimethyl amine oxide, such as dodecyl dimethyl amine oxide.

[0019] More preferably, the mass ratio of the betaine-type surfactant to the amine oxide-type surfactant is 1:(0.5-1.5).

[0020] Preferably, the organic salt is selected from oxalate, citrate, and lactate; the inorganic salt is selected from carbonate or bicarbonate. More preferably, the mass ratio of the organic salt to the inorganic salt is 1:(0.1-0.5).

[0021] More preferably, the chelating agent is selected from one or more of disodium ethylenediaminetetraacetate, hydroxyethylidene diphosphonic acid, methylglycine diacetic acid, citric acid, and sodium citrate.

[0022] The preparation method of the above-mentioned shower gel with stable suspended pearlescent effect includes the following steps:

[0023] S1. Dissolve the chelating agent in water, and add alcohol, anionic surfactant, nonionic surfactant and amphoteric surfactant in sequence while stirring. Stir until all components are completely dissolved to obtain a transparent and homogeneous mixture A.

[0024] S2. Stir and heat mixture A to 80-85℃, then stir and add salts to mix. Stir and cool to 40-45℃, and continue stirring until the system becomes opaque and pearlescent to obtain mixture B.

[0025] S3. Add vegetable oil to mixture B and stir well. After cooling to 35-40℃, adjust the pH to 6.5-7.5. After cooling, a shower gel with a stable suspended pearlescent effect is obtained.

[0026] Preferably, in step S3, the pH is adjusted using citric acid or lactic acid.

[0027] The shower gel of this invention, through the compounding of surfactant system, alcohols, and salts, combined with plant oil compounding ingredients, can exhibit a pearlescent effect, and the pearlescent crystals have excellent thermal stability. After being placed in an environment of 45°C for 12 hours, they can still remain stable after returning to room temperature. While providing moisturizing, hydrating, and smoothing effects to the skin, it can achieve stable suspension of pearlescent crystals and solve the problem of layering that easily occurs when the product has a high content of plant oil. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 The image shows the shower gel after a thermal stability test according to Example 1 of the present invention.

[0030] Figure 2 The image shows the shower gel after the thermal stability test of Comparative Example 1.

[0031] Figure 3 The image shows the shower gel after the thermal stability test of Comparative Example 5.

[0032] Figure 4The image shows the shower gel after the thermal stability test of Comparative Example 6.

[0033] Figure 5 The image shows the shower gel after the thermal stability test of Comparative Example 7.

[0034] Figure 6 The image shows the shower gel after the thermal stability test of Comparative Example 8.

[0035] Figure 7 The image shows the heat stability test results for the shower gel in Comparative Example 9.

[0036] Figure 8 Images are taken after thermal stability testing of commercially available shower gel products. Detailed Implementation

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1

[0039] Add the following components by weight percentage:

[0040] S1. Dissolve 1.0% disodium ethylenediaminetetraacetate in water, and while stirring, add 7% xylitol, 38% disodium dodecyl sulfosuccinate, 5% fatty amine polyoxyethylene ether, and 3% amphoteric surfactant in sequence, stirring until all components are completely dissolved to obtain a transparent and homogeneous mixture A.

[0041] S2. Stir and heat mixture A to 82°C, then stir and add 4% salts, stir and cool to 42°C, and continue stirring until the system becomes opaque and pearlescent to obtain mixture B.

[0042] S3. Add 12% vegetable oil to mixture B and stir well. After cooling to 38°C, adjust the pH to 7 and cool to room temperature to obtain a shower gel with a stable suspended pearlescent effect.

[0043] The vegetable oil is composed of sunflower seed oil, soybean oil and avocado fruit oil in a weight ratio of 1:1.25:1.5; the amphoteric surfactant is composed of hexadecyl sulfobetaine and dodecyl dimethylamine oxide in a mass ratio of 1:1; and the salt is composed of sodium citrate and sodium carbonate in a mass ratio of 1:0.35.

[0044] Example 2

[0045] Add the following components by weight percentage:

[0046] S1. Dissolve 1.2% sodium citrate in water, and while stirring, add 6% xylitol, 35% disodium dodecyl sulfosuccinate, 4% fatty amine polyoxypropylene ether, and 3.8% amphoteric surfactant in sequence, stirring until all components are completely dissolved to obtain a transparent and homogeneous mixture A.

[0047] S2. Stir and heat mixture A to 85°C, then stir and add 5% salt to mix, stir and cool to 45°C, and continue stirring until the system becomes opaque and pearlescent to obtain mixture B;

[0048] S3. Add 10% vegetable oil to mixture B and stir well. After cooling to 40°C, adjust the pH to 7.5 and cool to room temperature to obtain a shower gel with a stable suspended pearlescent effect.

[0049] The vegetable oil is composed of sunflower seed oil, soybean oil and avocado fruit oil in a weight ratio of 1:2:0.1; the amphoteric surfactant is composed of hexadecylamide betaine and dodecyl dimethylamine oxide in a mass ratio of 1:0.5; and the salt is composed of sodium oxalate and sodium carbonate in a mass ratio of 1:0.1.

[0050] Example 3

[0051] Add the following components by weight percentage:

[0052] S1. Dissolve 0.8% hydroxyethylidene diphosphonic acid and 0.7% methylglycine diacetic acid in water. While stirring, add 8% sorbitol, 40% disodium octadecyl sulfosuccinate, 4.5% PEG-11 cocoamide, and 2.5% amphoteric surfactant in sequence. Stir until all components are completely dissolved to obtain a transparent and homogeneous mixture A.

[0053] S2. Stir and heat mixture A to 80°C, then stir and add 3% salts, stir and cool to 40°C, and continue stirring until the system becomes opaque and pearlescent to obtain mixture B.

[0054] S3. Add 15% vegetable oil to mixture B and stir well. After cooling to 35°C, adjust the pH to 6.5 and cool to room temperature to obtain a shower gel with a stable suspended pearlescent effect.

[0055] The vegetable oil is composed of sunflower seed oil, soybean oil and avocado fruit oil in a weight ratio of 1:0.1:2; the amphoteric surfactant is composed of hexadecyl betaine and dodecyl dimethylamine oxide in a mass ratio of 1:1.5; and the salt is composed of lactate and bicarbonate in a mass ratio of 1:0.5.

[0056] Example 4

[0057] Add the following components by weight percentage:

[0058] S1. Dissolve 1.0% citric acid in water, and while stirring, add 6.5% sorbitol, 36% disodium octadecyl sulfosuccinate, 6.5% PPG-2 cocoamide, and 2.5% amphoteric surfactant in sequence. Stir until all components are completely dissolved to obtain a transparent and homogeneous mixture A.

[0059] S2. Stir and heat mixture A to 80°C, then stir and add 3.5% salts, stir and cool to 40°C, and continue stirring until the system becomes opaque and pearlescent to obtain mixture B;

[0060] S3. Add 13% vegetable oil to mixture B and stir well. After cooling to 35°C, adjust the pH to 7 and cool to room temperature to obtain a shower gel with a stable suspended pearlescent effect.

[0061] The vegetable oil is composed of sunflower seed oil, soybean oil and avocado fruit oil in a weight ratio of 1:1:1; the amphoteric surfactant is composed of hexadecyl sulfobetaine and dodecyl dimethylamine oxide in a mass ratio of 1:1; and the salt is composed of lactate and bicarbonate in a mass ratio of 1:0.3.

[0062] Based on Example 1, Examples 5-8 are further set up as shown in Table 1. The difference from Example 1 is that the component content is different, but the rest of the steps are the same as in Example 1.

[0063] Table 1. Content (%) of each component in the shower gels of Examples 5-8

[0064] Disodium dodecyl sulfosuccinate 35 40 35 35 Fatty amine polyoxyethylene ether 3.5 8 5.6 6 Amphoteric surfactants 2 4 3.5 4 vegetable oil 8 15 9.5 10 Xylitol 6 8 7.5 7 Salts 3 5 4.5 4 Disodium ethylenediaminetetraacetate 0.5 1.5 1 1 water margin margin margin margin

[0065] The shower gels prepared in Examples 1-8 were subjected to the following tests:

[0066] 1. Pearl crystal observation: Observe whether pearl crystals are produced in the prepared shower gel.

[0067] 2. Stability test: The shower gel that produces pearlescent crystals is left to stand in an environment of 25±5℃ for seven days. Observe whether the pearlescent crystals disappear, settle, or separate into layers.

[0068] 3. Thermal stability test: Place the shower gel that produces pearlescent crystals in an environment of 45±1℃ for 12 hours. After returning to room temperature, observe whether the pearlescent crystals in the shower gel disappear, settle, or separate into layers.

[0069] The test results are shown in Table 2 below.

[0070] Table 2. Test results of the shower gels in Examples 1-8

[0071] Example 1 have It did not disappear, did not settle, and did not stratify. It did not disappear, did not settle, and did not stratify. Example 2 have It did not disappear, did not settle, and did not stratify. It did not disappear, did not settle, and did not stratify. Example 3 have It did not disappear, did not settle, and did not stratify. It did not disappear, did not settle, and did not stratify. Example 4 have It did not disappear, did not settle, and did not stratify. It did not disappear, did not settle, and did not stratify. Example 5 have It did not disappear, did not settle, and did not stratify. It did not disappear, did not settle, and did not stratify. Example 6 have It did not disappear, did not settle, and did not stratify. It did not disappear, did not settle, and did not stratify. Example 7 have It did not disappear, did not settle, and did not stratify. It did not disappear, did not settle, and did not stratify. Example 8 have It did not disappear, did not settle, and did not stratify. It did not disappear, did not settle, and did not stratify.

[0072] In the process of researching the shower gel of this invention, the following experiments were also conducted.

[0073] To investigate the effect of the components of the shower gel of the present invention on the product effect, comparative examples 1-8 with the components shown in Table 3 were prepared based on Example 1, and other steps were the same as in Example 1.

[0074] Table 3. Contents of each component in the shower gels of Examples 1 and Comparative Examples 1-8

[0075]

[0076] The shower gels of Comparative Examples 1-7 were subjected to the above-mentioned pearl crystallization observation, stability test, and thermal stability test. The test results are shown in Table 4 below.

[0077] Table 4 shows the test results of the shower gels in Comparative Examples 1-7.

[0078] Comparative Example 1 have Not disappeared, settled, not stratified It has not disappeared but has decreased, there is sedimentation, and it does not stratify. Comparative Example 2 none / / Comparative Example 3 none / / Comparative Example 4 none / / Comparative Example 5 have Not disappeared, settled, stratified It has not disappeared but has decreased, with sedimentation and stratification. Comparative Example 6 have Not disappeared, settled, stratified Disappearance, no settling, stratification Comparative Example 7 have Not disappeared, settled, stratified Disappearance, no settling, stratification

[0079] Note: "Not disappeared but reduced" means that pearlescent crystals still exist after the test, but their quantity or volume has decreased compared to before the thermal stability test.

[0080] The image after the thermal stability test of the shower gel in Example 1 is shown below. Figure 1 As shown; the image after the thermal stability test of the shower gel in Comparative Example 1 is shown below. Figure 2 As shown; the image after the thermal stability test of the shower gel in Comparative Example 5 is shown below. Figure 3 As shown; the image after the thermal stability test of the shower gel in Comparative Example 6 is shown below. Figure 4 As shown; the image after the thermal stability test of the shower gel in Comparative Example 7 is shown. Figure 5 As shown.

[0081] As can be seen from the test results in Table 4, the choice of surfactant system is the key to whether pearlescent crystals can be formed. Alcohols, salts, and chelating agents play a key role in maintaining the stability and thermal stability of shower gels with high vegetable oil content.

[0082] To investigate the effect of the content of plant oil and surfactant system in the shower gel of the present invention on the product effect, comparative examples 8-15 with the components shown in Table 5 were prepared based on Example 1, and other steps were the same as in Example 1.

[0083] Table 5. Contents of each component in the shower gels of Examples 1 and Comparative Examples 8-15

[0084]

[0085] The shower gels of Comparative Examples 8-15 were subjected to the above-mentioned pearl crystallization observation, stability test, and thermal stability test. The test results are shown in Table 6 below.

[0086] Table 6 shows the test results of the shower gels in Comparative Examples 8-15.

[0087] Comparative Example 8 have It did not disappear, it settled, and it did not stratify. It did not disappear, it settled, and it did not stratify. Comparative Example 9 none Not disappeared, no settlement, stratified Not disappeared, no settlement, stratified Comparative Example 10 none / / Comparative Example 11 none / / Comparative Example 12 none / / Comparative Example 13 none / / Comparative Example 14 none / / Comparative Example 15 none / /

[0088] The image after the thermal stability test of the shower gel in Comparative Example 8 is shown below. Figure 6 As shown; the image after the thermal stability test of the shower gel in Comparative Example 9 is shown. Figure 7 As shown.

[0089] As can be seen from the test results in Table 6, the selection of the surfactant content in the present invention is also the key to whether the shower gel can form pearlescent crystals; when the amount of plant oil added is too small, the pearlescent crystals cannot be kept in stable suspension, and when the amount of plant oil added is too large, the shower gel will separate into layers.

[0090] During the research process, it was discovered that for the shower gel of this invention to form stable pearlescent crystals, the content of nonionic surfactants must not exceed 20% of the content of anionic surfactants. Specifically, during the research process, comparative examples 16 and 17 with the components shown in Table 7 were prepared, and other steps were the same as in Example 1.

[0091] Table 7. Content of each component in the shower gels of Examples 1, 16, and 17

[0092] vegetable oil 12 12 12 Disodium dodecyl sulfosuccinate 38 38 35 Fatty amine polyoxyethylene ether 5 8 8 Amphoteric surfactants 3 3 3 alcohols 7 7 7 Salts 4 4 4 Chelating agents 1.0 1.0 1.0 water margin margin margin

[0093] The shower gels of Comparative Examples 16 and 17 were subjected to the above-mentioned pearl crystallization observation, stability test, and thermal stability test. The test results are shown in Table 8 below.

[0094] Table 8 shows the test results of the shower gels in Comparative Examples 16 and 17.

[0095] Comparative Example 16 have It did not disappear, did not settle, and did not stratify. Not disappeared, settled, stratified Comparative Example 17 have It did not disappear, did not settle, and did not stratify. Not disappeared, settled, stratified

[0096] As can be seen from the test results in Table 8, when the content of nonionic surfactant exceeds 20% of the content of anionic surfactant, the shower gel has room temperature stability, but the thermal stability will deteriorate. After being placed in an environment of 45±1℃ for 12 hours, pearlescent crystal precipitation and stratification will occur after returning to room temperature.

[0097] In addition, during the research process, this invention also explored and verified whether different surfactant systems containing anionic surfactants, nonionic surfactants, and amphoteric surfactants are suitable for the shower gel of this invention and can achieve the same effect. The specific solutions are as follows.

[0098] 1) Verification scheme for the effect of different anionic surfactants on the shower gel of the present invention

[0099] Comparative Example 18: Compared with Example 1, sodium dodecyl sulfosuccinate disodium salt was replaced with sodium fatty alcohol polyoxyethylene ether sulfate, and the remaining steps were the same as in Example 1.

[0100] Comparative Example 19: Compared with Example 1, disodium dodecyl sulfosuccinate was replaced with sodium dodecylbenzene sulfonate, and the remaining steps were the same as in Example 1.

[0101] Comparative Example 20: Compared with Example 1, disodium dodecyl sulfosuccinate was replaced with sodium α-alkenyl sulfonate, and the remaining steps were the same as in Example 1.

[0102] Comparative Example 21: Compared with Example 1, disodium dodecyl sulfosuccinate was replaced with sodium cocoyl methyl taurate, and the remaining steps were the same as in Example 1.

[0103] Comparative Example 22: Compared with Example 1, disodium dodecyl sulfosuccinate was replaced with sodium hydroxyethyl sulfonate, and the remaining steps were the same as in Example 1.

[0104] Comparative Example 23: Compared with Example 1, disodium dodecyl sulfosuccinate was replaced with sodium lauryl phosphate, and the remaining steps were the same as in Example 1.

[0105] Comparative Example 24: Compared with Example 1, disodium dodecyl sulfosuccinate was replaced with sodium lauryl ether-6 carboxylate, and the remaining steps were the same as in Example 1.

[0106] 2) Verification scheme for the effect of different nonionic surfactants on the shower gel of the present invention

[0107] Comparative Example 25: Compared with Example 1, fatty amine polyoxyethylene ether was replaced with fatty alcohol polyoxyethylene ether, and the remaining steps were the same as in Example 1.

[0108] Comparative Example 26: Compared with Example 1, the fatty amine polyoxyethylene ether was replaced with alkylphenol polyoxyethylene ether, and the remaining steps were the same as in Example 1.

[0109] 3) Verification scheme for the effect of different amphoteric surfactants on the shower gel of the present invention

[0110] Comparative Example 27: Compared with Example 1, the amphoteric surfactant was hexadecyl sulfobetaine, and the remaining steps were the same as in Example 1.

[0111] Comparative Example 28: Compared with Example 1, the amphoteric surfactant was dodecyl dimethylamine oxide, and the remaining steps were the same as in Example 1.

[0112] Comparative Example 29: Compared with Example 1, the amphoteric surfactant was disodium lauroyl amphoteric diacetate, and the remaining steps were the same as in Example 1.

[0113] Comparative Example 30: Compared with Example 1, the amphoteric surfactant was disodium cocoamphodiacetate, and the remaining steps were the same as in Example 1.

[0114] Comparative Example 31: Compared with Example 1, the amphoteric surfactant was sodium dodecylaminopropionate, and the remaining steps were the same as in Example 1.

[0115] Comparative Example 32: Compared with Example 1, hexadecyl sulfobetaine was replaced with disodium lauroylamphoteric acid, and the remaining steps were the same as in Example 1.

[0116] Comparative Example 33: Compared with Example 1, dodecyl dimethylamine oxide was replaced with disodium lauroylamphoteric diacetate, and the remaining steps were the same as in Example 1.

[0117] Comparative Example 34: Compared with Example 1, hexadecyl sulfobetaine was replaced with sodium dodecyl aminopropionate, and the remaining steps were the same as in Example 1.

[0118] Comparative Example 35: Compared with Example 1, dodecyl dimethylamine oxide was replaced with sodium dodecyl aminopropionate, and the remaining steps were the same as in Example 1.

[0119] Comparative Example 36: Compared with Example 1, hexadecyl sulfobetaine was replaced with disodium lauroyl amphoteric diacetate, and dodecyl dimethylamine oxide was replaced with sodium dodecyl aminopropionate. The remaining steps were the same as in Example 1.

[0120] The shower gels of Comparative Examples 18-36 were subjected to the above-mentioned pearl crystallization observation, stability test, and thermal stability test. The test results are shown in Table 9 below.

[0121] Table 9. Test results of shower gels from comparative examples 18-36

[0122] Comparative Example 18 none / / Comparative Example 19 none / / Comparative Example 20 none / / Comparative Example 21 none / / Comparative Example 22 none / / Comparative Example 23 none / / Comparative Example 24 none / / Comparative Example 25 none / / Comparative Example 26 none / / Comparative Example 27 none / / Comparative Example 28 none / / Comparative Example 29 none / / Comparative Example 30 none / / Comparative Example 31 none / / Comparative Example 32 none / / Comparative Example 33 none / / Comparative Example 34 none / / Comparative Example 35 none / / Comparative Example 36 none / /

[0123] As can be seen from the test results in Table 9, when any of the anionic surfactant, nonionic surfactant, or amphoteric surfactant selected in this invention was replaced with other types of surfactants, the desired pearlescent crystals could not be formed. The reason may be that the surfactant combination in the shower gels of Comparative Examples 18-36 is inherently incapable of forming pearlescent crystals, or it may be that the concentration of each surfactant used was not chosen to achieve the ratio required for the precipitation of pearlescent crystals. Further investigation is warranted.

[0124] To investigate the effects of the content of alcohols, salts and chelating agents in the shower gel of the present invention on the product efficacy, comparative examples 37-42 with the components shown in Table 10 were prepared based on Example 1, with other steps being the same as in Example 1.

[0125] Table 10: Component content of shower gels in Comparative Examples 37-42

[0126]

[0127] The shower gels of Comparative Examples 37-42 were subjected to the above-mentioned pearl crystallization observation, stability test, and thermal stability test. The test results are shown in Table 11 below.

[0128] Table 11 shows the test results of the shower gels from Comparative Examples 37-42.

[0129] Comparative Example 37 have Not disappeared, settled, stratified It did not disappear but decreased, settled, or stratified. Comparative Example 38 have It did not disappear, did not settle, and did not stratify. Disappearance, no settling, stratification Comparative Example 39 have Not disappeared, settled, stratified Disappearance, no settling, stratification Comparative Example 40 have It did not disappear, did not settle, and did not stratify. Disappearance, no settling, stratification Comparative Example 41 have Not disappeared, settled, stratified Disappearance, no settling, stratification Comparative Example 42 none / /

[0130] As can be seen from the test results in Table 11, the content of alcohols, salts, and chelating agents plays a key role in maintaining the thermal stability of shower gels with high vegetable oil content.

[0131] During the research process, this invention also explored and verified whether different alcohols and salts are suitable for the shower gel of this invention and can achieve the same effect. The specific solution is as follows.

[0132] 1) Verification scheme for the effect of different alcohols on the shower gel of the present invention

[0133] Comparative Example 43: Compared with Example 1, xylitol was replaced with glycerol, and the remaining steps were the same as in Example 1.

[0134] Comparative Example 44: Compared with Example 1, xylitol was replaced with butanediol, and the remaining steps were the same as in Example 1.

[0135] Comparative Example 45: Compared with Example 1, xylitol was replaced with hexanediol, and the remaining steps were the same as in Example 1.

[0136] 2) Verification scheme for the effect of different salts on the shower gel of the present invention

[0137] Comparative Example 46: Compared with Example 1, only sodium citrate was used as the salt, and the remaining steps were the same as in Example 1.

[0138] Comparative Example 47: Compared with Example 1, only sodium carbonate was used as the salt, and the remaining steps were the same as in Example 1.

[0139] The shower gels of comparative examples 43-47 were subjected to the above-mentioned pearl crystallization observation, stability test, and thermal stability test. The test results are shown in Table 12 below.

[0140] Table 12 shows the test results of the shower gels from comparative examples 43-47.

[0141] Comparative Example 43 have It did not disappear, did not settle, and did not stratify. Not disappeared, settled, stratified Comparative Example 44 have It did not disappear, did not settle, and did not stratify. Not disappeared, settled, stratified Comparative Example 45 have It did not disappear, did not settle, and did not stratify. Not disappeared, settled, stratified Comparative Example 46 have It did not disappear, did not settle, and did not stratify. Not disappeared, settled, stratified Comparative Example 47 have It did not disappear, did not settle, and did not stratify. Disappearance, no settling, stratification

[0142] As can be seen from the test results in Table 12, the selection of polyols and the combination of organic and inorganic salts in this invention have a certain influence on maintaining the thermal stability of shower gels with high vegetable oil content.

[0143] We selected commercially available pearlescent shower gels containing pearlescent agents and conducted the above-mentioned stability and thermal stability tests. The test results are shown in Table 13 below.

[0144] Table 13 Test Results of Commercially Available Shower Gels

[0145] Commercially available shower gel It did not disappear, it settled, and it did not stratify. Disappearance, no settling, no stratification

[0146] Images of commercially available shower gels after thermal stability testing are shown below. Figure 8 As shown.

[0147] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A shower gel with a stable suspended pearlescent effect, characterized in that, Composed of the following ingredients by weight percentage: Anionic surfactants: 35-40%; Nonionic surfactants 3.5-8%; Amphoteric surfactants 2-4%; Vegetable oil 8-15%; Alcohols 6-8%; Salt content 3-5%; Chelating agent 0.5-1.5%; The remainder is water; The anionic surfactant is disodium dodecyl sulfosuccinate; The nonionic surfactant is selected from fatty amine polyoxyethylene ethers, and its content does not exceed 20% of the content of anionic surfactants; The amphoteric surfactant is composed of a combination of a betaine-type surfactant and an amine oxide-type surfactant; the betaine-type surfactant is hexadecyl sulfobetaine, and the amine oxide-type surfactant is dodecyl dimethylamine oxide; The vegetable oil is composed of sunflower seed oil, soybean oil, and avocado oil, with a weight ratio of 1:(0.1-2):(0.1-2). The alcohols mentioned are selected from xylitol; The salts are a mixture of organic and inorganic salts; the organic salts are selected from sodium citrate, and the inorganic salts are selected from sodium carbonate.

2. The shower gel with a stable suspended pearlescent effect as described in claim 1, characterized in that, The content of the nonionic surfactant is 10-15% of the content of the anionic surfactant.

3. The shower gel with a stable suspended pearlescent effect as described in claim 1, characterized in that, The mass ratio of the betaine-type surfactant to the amine oxide-type surfactant is 1:(0.5-1.5).

4. The shower gel with a stable suspended pearlescent effect as described in claim 1, characterized in that, The mass ratio of the organic salt to the inorganic salt is 1:(0.1-0.5).

5. The shower gel with a stable suspended pearlescent effect as described in claim 1, characterized in that, The chelating agent is selected from one or more of the following: disodium ethylenediaminetetraacetate, hydroxyethylidene diphosphonic acid, methylglycine diacetic acid, citric acid, and sodium citrate.

6. The method for preparing a shower gel with a stable suspended pearlescent effect as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Dissolve the chelating agent in water, and add alcohol, anionic surfactant, nonionic surfactant and amphoteric surfactant in sequence while stirring. Stir until all components are completely dissolved to obtain a transparent and homogeneous mixture A. S2. Stir and heat mixture A to 80-85℃, then stir and add salts to mix. Stir and cool to 40-45℃, and continue stirring until the system becomes opaque and pearlescent to obtain mixture B. S3. Add vegetable oil to mixture B and stir well. After cooling to 35-40℃, adjust the pH to 6.5-7.

5. After cooling, a shower gel with a stable suspended pearlescent effect is obtained.

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