Mild transparent amino acid shampoo and method for preparing the same

Abstract

The present application belongs to the field of cosmetics, and particularly relates to a mild and transparent amino acid shampoo and a preparation method thereof. The shampoo comprises the following components by weight: sodium cocoyl amino propionate, sodium cocoyl methyl taurate, sodium taurate, cocamidopropyl betaine, lauryl hydroxysultaine, disodium EDTA, distearyloxide-5 lauroyl glutamate, citric acid, acrylamidopropyl trimonium chloride / acrylamide copolymer, polyquaternium-10, myristamidopropyl PG-dimethyl ammonium chloride phosphate, polyquaternium-7, p-hydroxyacetophenone, octanoyl hydroxamic acid, cocamide MEA, essence and water. The present application is mild and non-irritating, and the quality is stable and controllable, and is suitable for large-scale production.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of cosmetics, and particularly relates to a mild transparent amino acid shampoo and a preparation method thereof. BACKGROUND

[0002] With the development of social economy, people's living standards are continuously improved, and after meeting the basic needs of clothing, food, shelter and transportation, people also begin to pay attention to other aspects, such as appearance. Hair is the key to show a person's appearance and temperament, and healthy and smooth hair can also bring people the enjoyment of beauty, and bring oneself and others a relaxed, happy and vigorous feeling. However, in daily life, behaviors such as combing, sun exposure, styling and perming can cause damage to hair and scalp, so hair care and cleaning are the most important lessons for maintaining beautiful hair. In addition to the basic function of shampooing, people are increasingly concerned about the safety, irritation and secondary damage of products to hair. Therefore, it has become an urgent problem to obtain a product with safe ingredients, simple formula and strong fashion design. SUMMARY

[0003] The present application aims to overcome the shortcomings in the prior art and provide a mild transparent amino acid shampoo and a preparation method thereof.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] A mild transparent amino acid shampoo comprises the following components by weight: sodium cocoyl amino propionate 25-35%, sodium cocoyl methyl taurate 15-25%, cocamidopropyl betaine 2-8%, lauryl hydroxysultaine 3-8%, disodium EDTA 0.05-0.1%, distearyol polyoxet-5 lauroyl glutamate 0.5-1.5%, citric acid 0.2-1%, acrylamidopropyl trimonium chloride / acrylamide copolymer 0.02-0.2%, polyquaternium-10 0.1-0.5%, myristamidopropyl PG-dimethyl ammonium chloride phosphate 0.3-1%, polyquaternium-7 0.2-1%, p-hydroxyacetophenone 0.2-0.5%, octanoyl hydroxamic acid 0.2-0.5%, cocamide methyl MEA 0.2-1%, fragrance 0.3-3%, and the balance is deionized water.

[0006] Preferably, the following components by weight are included: 30 parts of sodium cocoylaminopropionate, 20 parts of sodium cocoylmethyl taurate, 4 parts of cocamidopropyl betaine, 5 parts of lauryl hydroxysulfobetaine, 0.08 parts of disodium EDTA, 0.8 parts of disteareth-5 lauroyl glutamate, 0.5 parts of citric acid, 0.05 parts of acrylamidopropyltrimonium chloride / acrylamide copolymer, 0.3 parts of polyquaternium-10, 0.5 parts of myristamidopropyl PG-dimethylammonium chloride phosphate, 0.4 parts of polyquaternium-7, 0.3 parts of p-hydroxyacetophenone, 0.3 parts of caprylhydroxamic acid, 0.8 parts of cocamidomethyl MEA, 0.5 parts of flavor and deionized water added to 100 parts.

[0007] The present invention also includes a method for preparing the mild and transparent amino acid shampoo, comprising the following steps:

[0008] (1) Add deionized water, disodium EDTA, sodium cocoylaminopropionate, sodium cocoyl methyl taurate, cocamidopropyl betaine, lauryl hydroxysulfobetaine, disodium EDTA, disteareth-5 lauroyl glutamate, and parahydroxyacetophenone into a reactor, turn on the heating switch, control the temperature at 70-80°C, and stir until all are dissolved;

[0009] (2) Add polyquaternium-10 aqueous solution, acrylamidopropyltrimethylammonium chloride / acrylamide copolymer aqueous solution, myristamidopropyl PG-dimethylammonium chloride phosphate, polyquaternium-7, and cocamidomethyl MEA, start scraper stirring, and homogenize for 5 minutes;

[0010] (3) Add the essence first, start the scraper to stir, and homogenize for 5 minutes;

[0011] (4) Cool down to 45-50°C;

[0012] (5) Adjust the pH value and viscosity, add caprylhydroxamic acid, stir thoroughly, stop stirring, break the vacuum, take samples for testing, and discharge the material after passing the test.

[0013] Preferably, the homogenizing speed is 1000-4500 rpm.

[0014] Preferably, the homogenizing speed is 3000 rpm.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the prior art, surfactants used in shampoos are mostly sodium sulfate or sodium sulfonate salts such as AES and AOS. They have strong degreasing power. Long-term use will cause excessive cleaning of the scalp and hair, resulting in dry hair, redness and swelling of the scalp, and itching. Improper cleaning will also cause strong irritation around the eyes.

[0017] And in this application by using amino acid surfactant (sodium cocoyl amino propionate, sodium cocoyl methyl taurine taurine) as the main surfactant, some amphoteric surfactant (cocamidopropyl betaine), lauryl hydroxysultaine, cocamide MEA, etc. as auxiliary surfactant, without the complex AES, AOS such as Na salt of sulfuric acid or Na salt of sulfonic acid such as strong irritant surfactant, collocation of foam rich, dense, low irritability, mild shampoo. Sodium cocoyl amino propionate and sodium cocoyl methyl taurine are inserted between alkyl and carboxyl -CONHCHR'-(R' is the side chain of amino acid), the hydrophilic group of N-methyl-N-acyl taurine sodium is relatively stronger sulfonic acid group, so it has stronger solubility in water, but the cmc of amino acid is relatively lower than that of fatty acid, which also leads to the surfactant of amino acid system not easy to form micelles, smaller viscosity, difficult to form large micelles, so in the system, amphoteric surfactant (such as cocamidopropyl betaine, lauryl hydroxysultaine) is formed into a self-thickening system, assisted by other thickening agents such as distearyol polyether-5 lauroyl glutamate and cocamide MEA (without PEG, mild, less irritating to the human body), so that the system reaches the appropriate consistency and ensures the stability of the system.

[0018] At the same time, in order to add hair conditioner in shampoo, such as polyquaternium, acrylamidopropyl trimethyl ammonium chloride / acrylamide copolymer and other cationic polymers, which can be adsorbed to the damaged end of the hair through flocculation, smooth the hair, and provide smooth wet hair and dry hair feeling.

[0019] In order to protect the aroma, essential oil needs to be added;

[0020] The addition of essential oil and conditioner will cause the loss of product transparency, therefore, in the preparation method, homogenization is adopted. Homogenization is a technical means added in cream and emulsion, but through experiments, it is verified that this technical means not only solves the problem of adding a large amount of conditioner and essential oil in amino acid shampoo, but also ensures the transparency of the product, that is, the product will not become turbid and the state will not change at low temperature. In addition to homogenization, essential oil also participates in heating. The combination of heating and homogenization plays a role in ensuring the transparency of amino acid shampoo, but homogenization itself will reduce the viscosity of the product, therefore, in this application, the addition of complex amphoteric surfactant (such as cocamidopropyl betaine, lauryl hydroxysultaine) in raw materials forms a self-thickening system, which not only overcomes the defects of complex surfactant in raw materials, but also improves the reduction of product viscosity in the homogenization process.

[0021] In summary, the mild transparent amino acid shampoo of the present application is overall weakly acidic, close to the skin and scalp pH. The amino acid surfactant is selected for compounding, the thickening agent is PEG-free, there is no preservative system, the irritation to the human body is small, and it is mild. Then by increasing the homogenization process, the way of heating and homogenizing with essence, a large amount of conditioning agent and essence is successfully added to the product, so that the product has both efficacy and transparency. The mildness of the present application is non-irritating, the quality is stable and controllable, and it is suitable for large-scale production. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Viscosity trend chart of different embodiments. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and the best embodiment.

[0024] Example 1: 30 parts of sodium cocoyl amino propionate, 20 parts of sodium cocoyl methyl taurate, 4 parts of cocamidopropyl betaine, 5 parts of lauryl hydroxysultaine, 0.08 parts of disodium EDTA, 0.8 parts of distearyloxide-5 lauroyl glutamate, 0.5 parts of citric acid, 0.05 parts of acrylamidopropyl trimonium chloride / acrylamide copolymer, 0.3 parts of polyquaternium-10, 0.5 parts of myristamidopropyl PG-dimethylcetrimonium phosphate, 0.4 parts of polyquaternium-7, 0.3 parts of p-hydroxyacetophenone, 0.3 parts of caprylhydroxamic acid, 0.8 parts of cocamidopropyl MEA, 0.5 parts of fragrance, and deionized water are added to 100 parts.

[0025] Method for preparing a mild transparent amino acid shampoo:

[0026] (1) Put deionized water, disodium EDTA, sodium cocoyl amino propionate, sodium cocoyl methyl taurate, cocamidopropyl betaine, lauryl hydroxysultaine, disodium EDTA, distearyloxide-5 lauroyl glutamate, and p-hydroxyacetophenone into the reaction kettle, turn on the heating switch, and control the temperature at 70-80°C. Stir until all are dissolved.

[0027] (2) Add polyquaternium-10 aqueous solution, acrylamidopropyl trimonium chloride / acrylamide copolymer aqueous solution, myristamidopropyl PG-dimethylcetrimonium phosphate, polyquaternium-7, and cocamidopropyl MEA, and stir uniformly.

[0028] (3) Add the fragrance first, turn on the scraper stirring, and homogenize (3000 rpm) for 5 minutes.

[0029] (4) Cool to 45-50°C

[0030] (5) pH and viscosity were adjusted, and capryl hydroxamic acid was added, and the mixture was stirred well, then the stirring was stopped, the vacuum was broken, and the sample was detected. After the product was qualified, it was discharged.

[0031] Comparative Example 1: The difference between Comparative Example 1 and Example 1 is only that sodium cocoyl amino propionate and sodium cocoyl methyl taurate are added, and cocamidopropyl betaine, lauryl hydroxysultaine and cocamide MEA are not added. The amount of each component in Comparative Example 1 is as follows: sodium cocoyl amino propionate 30 parts, sodium cocoyl methyl taurate 20 parts, disodium EDTA 0.08 parts, distearyloxide-5 lauroyl glutamate 0.8 parts, citric acid 0.5 parts, acrylamidopropyl trimonium chloride / acrylamide copolymer 0.05 parts, polyquaternium-10 0.3 parts, myristamidopropyl PG-dimethyl ammonium chloride phosphate 0.5 parts, polyquaternium-7 0.4 parts, p-hydroxyacetophenone 0.3 parts, capryl hydroxamic acid 0.3 parts, fragrance 0.5 parts, and deionized water is added to 100 parts.

[0032] Comparative Example 2: The difference between Comparative Example 2 and Example 1 is only that polyquaternium and acrylamidopropyl trimonium chloride / acrylamide copolymer are not added. The amount of each component in Comparative Example 2 is as follows: sodium cocoyl amino propionate 30 parts, sodium cocoyl methyl taurate 20 parts, cocamidopropyl betaine 4 parts, lauryl hydroxysultaine 5 parts, disodium EDTA 0.08 parts, distearyloxide-5 lauroyl glutamate 0.8 parts, citric acid 0.5 parts, myristamidopropyl PG-dimethyl ammonium chloride phosphate 0.5 parts, polyquaternium-7 0.4 parts, p-hydroxyacetophenone 0.3 parts, capryl hydroxamic acid 0.3 parts, cocamide MEA 0.8 parts, fragrance 0.5 parts, and deionized water is added to 100 parts.

[0033] Comparative Example 3: The difference between Comparative Example 3 and Example 1 is only that the fragrance is added after cooling in step (4), and step (3) is only stirred (stirring speed 20-60 rpm) without homogenization. That is, the fragrance does not participate in heating and homogenization.

[0034] Comparative Example 4: The difference between Comparative Example 4 and Example 1 is only that the fragrance is added in step (3), and step (3) is only stirred (stirring speed 20-60 rpm) without homogenization. That is, the fragrance participates in heating but not in homogenization.

[0035] Comparative Example 5: The difference between Comparative Example 5 and Example 1 is only that step (3) is removed, and the fragrance is added after cooling in step (4) and then homogenized. That is, the fragrance is not heated, and the fragrance is added after homogenization.

[0036] Control group 6: The difference between control example 5 and example 1 is only that step (3) is removed, and the homogenization is performed after the temperature is lowered in step (4), and then the fragrance is added, that is, the fragrance is not heated, and the fragrance is added after homogenization.

[0037] Control group 7: The difference between control example 7 and example 1 is only that the fragrance is added in step (3), and the homogenization is performed first, and then the fragrance is added, that is, the fragrance is heated, and the fragrance is added after homogenization.

[0038] Example 2: The components of example 2 are the same as those of example 1, and the difference is only that the homogenization speed in the preparation method is different, and the homogenization speed is 1000 rpm.

[0039] Example 3: The components of example 3 are the same as those of example 1, and the difference is only that the homogenization speed in the preparation method is different, and the homogenization speed is 2000 rpm.

[0040] Example 4: The components of example 4 are the same as those of example 1, and the difference is only that the homogenization speed in the preparation method is different, and the homogenization speed is 4500 rpm.

[0041] The shampoo described in example 1 was measured.

[0042] 1. Mildness test verification: patch test method

[0043] Test object: cosmetic end product

[0044] Negative control: blank control

[0045] Test population: a total of 30 people, 10 men and 20 women, aged 21-60 years, meeting the health status of the subject volunteer selection standard.

[0046] Patch method: qualified patch testers are selected, and 0.02ml-0.025ml of the test object is placed in the patch tester by closed patch test method, and the special adhesive tape is applied to the back of the test subject, and the test object is removed after 24 hours, and the skin reaction is observed at 0.5, 24 and 48 hours after removal, respectively, and the results are recorded according to the skin reaction grading standard in the "Cosmetic Safety Technology Standard" (2015 edition). The test results are shown in Figure 1 Patch test results

[0047] 2. Transparency test verification: turbidity determination method

[0048] Put ice cubes or ice water, or other appropriate refrigerants below the determination temperature of 4℃ in a beaker.

[0049] Take a sample, pour into a pre-dried ψ2 cm x 13 cm glass test tube, the sample height is 1 / 3 of the length of the test tube. The plug of the series thermometer is tightly plugged into the test tube, and the mercury ball of the thermometer is located in the middle part of the sample. The outer part of the test tube is sleeved with another ψ2 cm x 15 cm test tube, and the test tube containing the sample is located in the middle of the sleeve, and attention is paid to not touch the bottoms of the two test tubes. The test tube is placed in a beaker with refrigerant to cool down, and the temperature of the test sample is gradually lowered. It is observed whether the test sample is clear when reaching the specified temperature, and the operation is repeated twice.

[0050] The value is measured by a turbidimeter, and the data is recorded.

[0051] 3. Viscosity determination method:

[0052] After the product is placed in the material measuring room for 24 h, an appropriate amount of sample is poured into a viscosity cup, the viscosity at 25℃ is measured, and the data is recorded.

[0053] 4. Stability test verification

[0054] Heat resistance method: pour the test sample into two ψ20 mm x 120 mm test tubes, so that the liquid level is about 80 mm, and plug in clean plugs. Put one of the test tubes to be tested in a pre-adjusted 40℃ constant temperature incubator, take it out after 1 month, and compare it with the test sample of the other test tube after recovering to room temperature.

[0055] Cold resistance method: pour the test sample into two ψ20 mm x 120 mm test tubes, so that the liquid level is about 80 mm, and plug in clean plugs. Put one of the test tubes to be tested in a pre-adjusted -8℃ refrigerator, take it out after 1 month, and compare it with the test sample of the other test tube after recovering to room temperature.

[0056] Table 1 shows that after the shampoo diluent is injected into the spot tester and applied to the back of the subject for 24 h, the skin is observed at 0.5, 24 and 48 h after removal, and there is no red spot, swelling phenomenon, and the subject also has no itching and stinging sensation, which can indicate that the amino acid shampoo prepared in Example 1 is relatively mild and has little irritation.

[0057] From Table 2, it can be seen that the control group 1, because the product is not added sodium cocoyl amino propionate, sodium cocoyl methyl taurate, the viscosity of the product is insufficient, and the product is in a turbid state. The control group 2 is not added polyquaternary ammonium salt, acrylamide propyl trimethyl ammonium chloride / acrylamide copolymer, the product has high transparency, but the order is weak. Compared with the control group 3, 4, the control group 5, 6, 7, the difference of the embodiment 1 is that the homogenization operation process is not implemented in the production process of the product and whether the essence is heated and participates in the homogenization step. The effect of the embodiment 1 is better than that of the control group 3, 4, the control group 5, 6, 7, and the transparency is also higher. Conclusion: In the process of product development, do not add hair conditioner, although the transparency is high, but not smooth, so add homogenization in the production process of the product, and the essence is heated and participates in the homogenization, the transparency of the product will be higher, and the conditioning property of the product will not be affected.

[0058] The transparency of the embodiment 2 is poor, the transparency effect of the embodiment 1, 3 is obvious, the transparency of the embodiment 4 is very good, but Figure 1 The viscosity of the embodiment 4 is shown to be significantly reduced. Description: The speed during homogenization has an obvious effect on the transparency of the product. With the increase of the speed, the transparency of the product will also increase, but when the speed exceeds a certain limit, the influence on the viscosity of the product will also increase accordingly, which will make the viscosity of the product decrease obviously, and exceed the viscosity range of the shampoo. Therefore, the homogenization speed is below (3000 rpm), the transparency of the product is good, and the viscosity of the product will not be significantly affected.

[0059] The results of the challenge experiment of the product show that the homogenization is added in the production process of the product, and the essence is heated and participates in the homogenization, which will not affect the stability of the product.

[0060] Table 1

[0061]

[0062] Table 2

[0063]

[0064] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A mild and transparent amino acid shampoo, characterized in that: The invention comprises the following components by weight: 30 parts of sodium cocoylaminopropionate, 20 parts of sodium cocoyl methyl taurate, 4 parts of cocamidopropyl betaine, 5 parts of lauryl hydroxysultaine, 0.08 parts of disodium EDTA, 0.8 parts of disteareth-5 lauroyl glutamate, 0.5 parts of citric acid, 0.05 parts of acrylamidopropyltrimonium chloride / acrylamide copolymer, 0.3 parts of polyquaternium-10, 0.5 parts of myristamidopropyl PG-dimonium chloride phosphate, 0.4 parts of polyquaternium-7, 0.3 parts of p-hydroxyacetophenone, 0.3 parts of caprylhydroxamic acid, 0.8 parts of cocamidomethyl MEA, 0.5 parts of fragrance and deionized water to 100 parts; The method for preparing the mild and transparent amino acid shampoo comprises the following steps: (1) Add deionized water, disodium EDTA, sodium cocoylaminopropionate, sodium cocoyl methyl taurate, cocamidopropyl betaine, lauryl hydroxysulfobetaine, disteareth-5 lauroyl glutamate, and parahydroxyacetophenone into the reactor, turn on the heating switch, control the temperature at 70-80°C, and stir until all are dissolved; (2) Add polyquaternium-10 aqueous solution, acrylamidopropyltrimethylammonium chloride / acrylamide copolymer aqueous solution, myristamidopropyl PG-dimethylammonium chloride phosphate, polyquaternium-7, cocamide methyl MEA, start scraper stirring, and homogenize for 5 minutes; (3) Add essence first, start scraper stirring, and homogenize for 5 minutes; (4) Cool down to 45-50℃; (5) Adjust the pH value and viscosity, add caprylhydroxamic acid, stir thoroughly, stop stirring, break the vacuum, take samples for testing, and discharge the material after passing the test; The homogenization speed was 3000 rpm.

Images