Composition containing lauroyl alanine as well as preparation method and application of composition

Abstract

The invention discloses a composition containing lauroyl alanine as well as a preparation method and application of the composition. The composition is prepared from the following components in parts by weight: 0.5 to 10 parts of lauroyl alanine, 0.5 to 5 parts of sodium cocoyl methyl taurate, 0.01 to 0.5 part of hydroxyethyl chitosan, 0.5 to 5 parts of basic amino acid and 1 to 20 parts of rice washing water. Through cooperation of the lauroyl alanine, the sodium cocoyl methyl taurate, the hydroxyethyl chitosan, the alkaline amino acid, the rice washing water and other components, the composition has the advantages of being rich and fine in foam, mild, small in irritation, capable of entering eyes, high in cleaning capacity, capable of being flushed with water, free of false smoothness, free of residues, not tight, capable of preserving moisture, environmentally friendly, degradable and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of cosmetics, and in particular to a composition containing lauroyl alanine, and a preparation method and application thereof. Background Art

[0002] Facial cleansing or skin cleansing is part of daily skin care, which has the functions of removing dirt and oil, preventing skin problems, promoting the absorption of skin care products, balancing oil, soothing the skin, etc. Foam-type cleansing products are often used for personal cleansing. Cleansing products delivered by foam are easy to spread on the skin and can clean the skin surface without leaving obvious residue on the skin surface. Because of the structural effect of the foam, the dirt can be taken away with the foam after washing.

[0003] In the prior art, sodium lauroyl alanine is often added to foam products, such as CN111225653A-compact aerosol hair care composition containing hydrocarbon foaming agent, CN112076108A-children's hair cleaning product containing biomimetic phospholipid structure conditioner, CN111671700A-a kind of anti-drying and sensitive composition and its preparation method, etc. Although sodium lauroyl alanine has good cleaning and emulsifying properties, the pH value of its aqueous solution is between 7.5-10.0, which belongs to the strong alkaline range. The suitable pH value of human skin surface is weakly acidic, and the pH value of healthy skin is usually between 4.5 and 6.5. This range is considered to be the best acid-base environment for skin. If the pH value of the skin is too high (leaning towards alkaline), it may cause the skin barrier function to decrease, the skin's permeability to water to increase, and the recovery rate of the skin barrier function to slow down, which is easy to cause problems such as dry skin, itching and sensitivity. On the contrary, if the pH value is too low (too acidic), it may also cause skin problems such as sensitivity, redness, breakouts, etc. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, one of the objects of the present invention is to provide a composition containing lauroyl alanine to solve the above-mentioned traditional technical problems.

[0005] A second object of the present invention is to provide a method for preparing the above-mentioned composition containing lauroyl alanine.

[0006] The third object of the present invention is to provide an application, in which the composition containing lauroyl alanine is used in the preparation of facial cleansing and skin cleansing products.

[0007] One of the purposes of the present invention is achieved by the following technical solution:

[0008] A composition containing lauroyl alanine, comprising the following components in parts by weight:

[0009] 0.5-10 parts of lauroyl alanine, 0.5-5 parts of sodium cocoyl methyl taurate, 0.01-0.5 parts of hydroxyethyl chitosan, 0.5-5 parts of basic amino acids, 1-20 parts of rice washing water.

[0010] In the present invention, by combining components such as lauroyl alanine, sodium cocoyl methyl taurate, hydroxyethyl chitosan, alkaline amino acids and rice washing water, the composition has the advantages of rich and delicate foam, mild irritation and small eye contact, strong cleaning ability, flushability, no false slipperiness, no residue, no tightness, moisturizing, environmental protection and degradability.

[0011] Among them, lauroyl alanine, as an amino acid surfactant, has excellent detergency, cleaning and foaming properties, and can effectively clean grease and dirt on the skin surface. At the same time, lauroyl alanine shows strong acidity (pH 3.5-5.0), and needs to be coordinated with the effects of sodium cocoyl methyl taurate and alkaline amino acids to make the pH of the composition suitable for human skin.

[0012] Sodium Cocoyl Methyl Taurate is also an amino acid surfactant with mild nature, less irritation to the skin, good cleaning ability, and can effectively remove oil and dirt on the skin surface, leaving the skin refreshed and clean. At the same time, its pH value range is 7.0-8.5, which can stabilize and adjust the pH value of skin care products, making it closer to the skin's natural acid-base balance, helping to maintain the skin's health.

[0013] Hydroxyethyl chitosan molecules contain a large number of hydroxyl groups, which have good hydrophilicity and moisturizing properties, help reduce skin surface tension, and facilitate the cleaning of surfactants to enhance their cleaning effects.

[0014] Rice washing water, also known as rice washing water, is the water after washing rice. It contains some dissolved starch, protein, vitamins, minerals and other nutrients, which can help decompose the oil on the face, dilute the pigment, and make the skin smooth and elastic.

[0015] Furthermore, the molecular weight of hydroxyethyl chitosan is 400-600Da. Using a suitable molecular weight can better improve its effect.

[0016] Furthermore, the basic amino acid is one or more of arginine, lysine, citrulline, ornithine, creatine, and histidine. Through the action of the basic amino acid, the pH value of the composition is adjusted, and the composition has good bubble properties, so that the foam of the composition is richer and more delicate.

[0017] Further, the rice washing water comprises the following components in percentage by weight:

[0018] Starch 5-10%, protein 1-5%, vitamins 2-8%, minerals 1-3%, and the rest is water.

[0019] Furthermore, the starch is composed of amylose and amylopectin in a mass ratio of 1:(2-3), the molecular weight of amylose is 100000Da-200000Da, and the molecular weight of amylopectin is 200000Da-400000Da.

[0020] Furthermore, the protein is one or more of albumin, globulin, glutenin and alcohol-soluble protein.

[0021] Furthermore, the vitamin is one or more of vitamin B1 (thiamine), vitamin B2 (riboflavin), vitamin B3 (niacin), vitamin B5 (pantothenic acid), vitamin B6, vitamin B9 (folic acid), vitamin E, and vitamin K.

[0022] Furthermore, the mineral is one or more of potassium, magnesium, calcium, iron, zinc, phosphorus and selenium.

[0023] Furthermore, the mass ratio of lauroyl alanine, sodium cocoyl methyl taurate, and hydroxyethyl chitosan is 1:0.5:0.2, and the amount of foam is more appropriate, and neither too much foam nor too little foam is produced, which provides a better experience for customers.

[0024] The second object of the present invention is achieved by adopting the following technical solution:

[0025] A method for preparing a composition containing lauroyl alanine comprises the following steps:

[0026] First filter and disinfect the rice washing water, then add lauroyl alanine, hydroxyethyl deacetylated chitosan and sodium cocoyl methyl taurate, stir evenly, then add alkaline amino acids, adjust the pH value between 4.5 and 6.5, and you have it.

[0027] The third object of the present invention is achieved by adopting the following technical solution:

[0028] One application is to use the above-mentioned composition containing lauroyl alanine in preparing facial cleansing and skin cleansing products.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The composition containing lauroyl alanine of the present invention is prepared by combining lauroyl alanine, sodium cocoyl methyl taurate, hydroxyethyl chitosan, alkaline amino acids and rice washing water, so that the composition has the advantages of rich and delicate foam, mild irritation, small eye irritation, strong cleaning ability, flushability, no false slipperiness, no residue, no tightness, moisturizing, environmental protection and degradability. DETAILED DESCRIPTION

[0031] Below, in conjunction with specific embodiments, the present invention is further described. It should be noted that, under the premise of no conflict, the embodiments described below or the technical features can be arbitrarily combined to form new embodiments. In the following embodiments, lauroyl alanine was purchased from Kunshan Sheng'an Biotechnology Co., Ltd., cocoyl methyl taurine sodium taurate was purchased from Wuhan Lanabai Pharmaceutical Chemical Co., Ltd., hydroxyethyl deacetylated chitosan was purchased from Zhongke Houpu (Guangzhou) Technology Development Co., Ltd., arginine, lysine, citrulline, ornithine, creatine, histidine and other basic amino acids were purchased from Jiangsu Jiujia Biotechnology Co., Ltd., and rice washing water was rice washing water from Northeast rice. The rice washing water includes the following components in weight percentage: starch 10%, protein 3%, vitamin 4%, mineral 3%, and the rest is water.

[0032] Example 1

[0033] A composition comprises the following components in parts by weight:

[0034] 2 parts of lauroyl alanine, 1 part of sodium cocoyl methyl taurate, 0.4 parts of hydroxyethyl chitosan, 0.5 parts of citrulline, and 20 parts of rice washing water.

[0035] The preparation steps are:

[0036] First filter and disinfect the rice washing water, then add lauroyl alanine, hydroxyethyl deacetylated chitosan and sodium cocoyl methyl taurate, stir evenly, then add citrulline, adjust the pH value between 4.5 and 6.5, and you have it.

[0037] Example 2

[0038] A composition comprises the following components in parts by weight:

[0039] 4 parts of lauroyl alanine, 1 part of sodium cocoyl methyl taurate, 0.4 parts of hydroxyethyl chitosan, 0.5 parts of ornithine, and 20 parts of rice washing water.

[0040] The preparation steps are:

[0041] First filter and disinfect the rice washing water, then add lauroyl alanine, hydroxyethyl deacetylated chitosan and sodium cocoyl methyl taurate, stir evenly, then add ornithine, and adjust the pH value to between 4.5 and 6.5.

[0042] Example 3

[0043] A composition comprises the following components in parts by weight:

[0044] 10 parts of lauroyl alanine, 1 part of sodium cocoyl methyl taurate, 0.4 parts of hydroxyethyl chitosan, 0.5 parts of arginine, and 20 parts of rice washing water.

[0045] The preparation steps are:

[0046] First filter and disinfect the rice washing water, then add lauroyl alanine, hydroxyethyl deacetylated chitosan and sodium cocoyl methyl taurate, stir evenly, then add arginine, adjust the pH value between 4.5 and 6.5, and you have it.

[0047] Example 4

[0048] A composition comprises the following components in parts by weight:

[0049] 2 parts of lauroyl alanine, 4 parts of sodium cocoyl methyl taurate, 0.4 parts of hydroxyethyl chitosan, 0.5 parts of citrulline, and 20 parts of rice washing water.

[0050] The preparation steps are:

[0051] First filter and disinfect the rice washing water, then add lauroyl alanine, hydroxyethyl deacetylated chitosan and sodium cocoyl methyl taurate, stir evenly, then add citrulline, adjust the pH value between 4.5 and 6.5, and you have it.

[0052] Example 5

[0053] A composition comprises the following components in parts by weight:

[0054] 2 parts of lauroyl alanine, 1 part of sodium cocoyl methyl taurate, 0.5 parts of hydroxyethyl chitosan, 2 parts of citrulline, and 20 parts of rice washing water.

[0055] The preparation steps are:

[0056] First filter and disinfect the rice washing water, then add lauroyl alanine, hydroxyethyl deacetylated chitosan and sodium cocoyl methyl taurate, stir evenly, then add citrulline, adjust the pH value between 4.5 and 6.5, and you have it.

[0057] Comparative Example 1

[0058] The difference from Example 1 is that a considerable amount of purified water is used to replace sodium cocoyl methyl taurate in Comparative Example 1, and other ingredients and preparation methods are the same.

[0059] That is, the composition of Comparative Example 1 includes the following components in parts by weight:

[0060] 2 parts of lauroyl alanine, 1 part of purified water, 0.4 parts of hydroxyethyl chitosan, 0.5 parts of citrulline, and 20 parts of rice washing water.

[0061] Comparative Example 2

[0062] The difference from Example 1 is that in Comparative Example 2, a considerable amount of purified water is used instead of hydroxyethyl deacetylated chitosan, and the other ingredients and preparation methods are the same.

[0063] That is, the composition of Comparative Example 2 includes the following components in parts by weight:

[0064] 2 parts of lauroyl alanine, 1 part of sodium cocoyl methyl taurate, 0.4 parts of purified water, 0.5 parts of citrulline, and 20 parts of rice washing water.

[0065] Comparative Example 3

[0066] Different from Example 1, in Comparative Example 3, a considerable amount of purified water is used instead of rice washing water, and other ingredients and preparation methods are the same.

[0067] That is, the composition of Comparative Example 3 includes the following components in parts by weight:

[0068] 2 parts of lauroyl alanine, 1 part of sodium cocoyl methyl taurate, 0.4 parts of hydroxyethyl chitosan, 0.5 parts of citrulline, and 20 parts of purified water.

[0069] Comparative Example 4

[0070] Different from Example 1, the rice washing water in Comparative Example 4 comprises the following components in weight percentage: 20% starch, 3% protein, 1% vitamins, 1% minerals, and the rest is water. Other ingredients and preparation methods are the same.

[0071] Performance Testing

[0072] 1. Cleansing Cream

[0073] 1. Ingredients of cleansing cream

[0074] The cleansing cream comprises the following components in parts by weight:

[0075] 10 parts of the composition of the comparative example or the embodiment, 5 parts of the acrylate copolymer, 6 parts of ethylene glycol distearate, 4 parts of sodium citrate, 0.2 parts of kason and 0.1 parts of flavor.

[0076] 2. Cleansing effect test

[0077] In order to evaluate the sensory experience effect of the cleansing cream, the cleansing cream was distributed to 90 volunteers for testing. Each test group consisted of 10 people, aged between 18 and 40 years old, including 5 male volunteers and 5 female volunteers. Each test group used one of the test products.

[0078] The volunteers washed their faces with the cleansing cream in the same way, once in the morning and once in the evening, for one week, and rated the cleansing cream according to their own experience. The rating was based on a 10-point system, with 0-3 being the worst, 4-6 being moderate, and 7-10 being the best. The higher the score, the better the effect. The irritation was evaluated as mild, normal, irritating, etc. The average scores of the evaluation of the use effect are listed in Table 1 below.

[0079] Table 1

[0080] project Irritant Foam Effect Cleansing effect Moisturizing feeling after washing Moisturizing effect Overall Rating Example 1 mild 9.2 9.8 9.6 9.7 9.575 Example 2 mild 9.7 9.2 9.1 9.2 9.3 Example 3 mild 9.9 9.5 9 9.1 9.375 Example 4 mild 9.4 9.1 9.1 9.1 9.175 Example 5 mild 9.2 9.2 9.3 9.8 9.375 Comparative Example 1 Irritating 7.9 8.2 8.3 8.1 8.125 Comparative Example 2 generally 8.1 7.9 7.5 6.7 7.55 Comparative Example 3 mild 8.7 7.8 8.7 7.9 8.275 Comparative Example 4 mild 6.2 5.5 4.9 7.6 6.05

[0081] As can be seen from the above table, the facial cleansing cream to which the embodiments of the present invention are added has the effects of rich and delicate foam, mild and low irritation, strong cleansing ability, good moisturizing, and good moisturizing feeling after washing.

[0082] 2. Shower Gel

[0083] 1. Ingredients of shower gel

[0084] The shower gel comprises the following components in parts by weight:

[0085] 4 parts of the composition of the comparative example or the embodiment, 1 part of polyquaternium-67, 10 parts of lauryl glucoside, 0.1 parts of PEG-120 methyl glucose dioleate, 0.1 parts of phenoxyethanol, 0.1 parts of methylparaben, and 0.1 parts of fragrance.

[0086] 2. Skin cleansing effect test

[0087] In order to evaluate the sensory experience effect of shower gel, the shower gel was distributed to 90 volunteers for testing. Each test group consisted of 10 people, aged between 18 and 40 years old, including 5 male volunteers and 5 female volunteers. Each test group used one of the test products.

[0088] The volunteers used the shower gel in the same way and shampooed their hair according to their own habitual cycles for 5 consecutive cycles. They rated the shower gel based on their own experience. The rating was based on a 10-point system, with 0-3 being the worst, 4-6 being moderate, and 7-10 being the best. The higher the score, the better the effect. The irritation was evaluated as mild, general, irritating, etc. The average scores of the use effect evaluation are listed in Table 2 below.

[0089] Table 2

[0090] project Irritant Foam Effect Cleansing effect Moisturizing feeling after washing Moisturizing effect Example 1 mild 9.3 9.6 9.6 9.8 Example 2 mild 9.5 9.0 9.1 9.4 Example 3 mild 9.5 9.6 9.2 9.1 Example 4 mild 9.3 9.2 9.0 9.1 Example 5 mild 9.5 9.5 9.1 9.8 Comparative Example 1 Irritating 8.2 8.2 7.6 7.6 Comparative Example 2 generally 7.9 7.9 7.8 6.0 Comparative Example 3 mild 8.5 8.1 8.3 7.6 Comparative Example 4 mild 7.0 6.3 5.2 6.35

[0091] As can be seen from the above table, the shower gel to which the embodiments of the present invention are added has the effects of rich and delicate foam, mild and low irritation, strong cleansing ability, good moisturizing, and good moisturizing feeling after washing.

[0092] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A composition containing lauroyl alanine, characterized in that The composition comprises the following components in parts by weight: 0.5-10 parts of lauroyl alanine, 0.5-5 parts of sodium cocoyl methyl taurate, 0.01-0.5 parts of hydroxyethyl chitosan, 0.5-5 parts of basic amino acids, 1-20 parts of rice washing water.

2. The composition containing lauroyl alanine according to claim 1, characterized in that The molecular weight of the hydroxyethyl chitosan is 400-600 Da.

3. The composition containing lauroyl alanine according to claim 1, characterized in that The basic amino acid is one or more of arginine, lysine, citrulline, ornithine, creatine and histidine.

4. The lauroyl alanine-containing composition according to claim 1, characterized in that The rice washing water comprises the following components in percentage by weight: Starch 5-10%, protein 1-5%, vitamins 2-8%, minerals 1-3%, and the rest is water.

5. The lauroyl alanine-containing composition according to claim 4, characterized in that The starch consists of amylose and amylopectin in a mass ratio of 1:(2-3), the molecular weight of the amylose is 100000Da-200000Da, and the molecular weight of the amylopectin is 200000Da-400000Da.

6. The lauroyl alanine-containing composition according to claim 4, characterized in that The protein is one or more of albumin, globulin, glutenin and alcohol-soluble protein.

7. The lauroyl alanine-containing composition according to claim 4, characterized in that The vitamins are one or more of vitamin B1, vitamin B2, vitamin B3, vitamin B5, vitamin B6, vitamin B9, vitamin E, and vitamin K.

8. The composition containing lauroyl alanine according to claim 1, characterized in that The mass ratio of lauroyl alanine, sodium cocoyl methyl taurate taurate and hydroxyethyl chitosan is 1:0.5:0.

2.

9. A method for preparing a composition containing lauroyl alanine as claimed in any one of claims 1 to 8, characterized in that: The steps include: First filter and disinfect the rice washing water, then add lauroyl alanine, hydroxyethyl deacetylated chitosan and sodium cocoyl methyl taurate, stir evenly, then add alkaline amino acids, adjust the pH value between 4.5 and 6.5, and you have it.

10. An application, characterized in that: The lauroyl alanine-containing composition according to any one of claims 1 to 8 is used in preparing facial cleansing and skin cleansing products.