A surfactant composition with selective cleaning effect and its preparation method and application

Abstract

The present invention discloses a surfactant composition with selective cleaning effect, a preparation method and application thereof. The surfactant composition with selective cleaning effect of the present invention comprises sodium lauroyl aspartate, disodium cocoyl glutamate and / or sodium cocoyl glutamate, PEG-80 sorbitan laurate, glycolipids and oligofructose. The surfactant composition of the present invention, in addition to having good mild properties, can also reduce the CMC of other surfactants, thereby greatly improving the mildness of cleaning products. The surfactant composition with selective cleaning effect of the present invention can reduce the cleaning power of other surfactants on cholesterol, thereby reducing overall skin irritation, and can improve the mildness of the product when used in facial cleansing and other skin-contacting toiletries.

Description

Technical Field

[0001] The invention relates to a surfactant composition with selective cleaning effect and a preparation method and application thereof. Background Art

[0002] Various cleansing products in cosmetics have become very common and have become a must-have for daily care. There are a wide variety of cleansing products on the market, most of which emphasize deep cleansing and rich foam as promotional points. These products often have strong cleaning capabilities, but it does not mean that the stronger the cleaning ability of the product, the friendlier it is to consumers. The most common surfactants in cleansing products are: sodium laureth sulfate, potassium cocoyl glycinate, fatty acid salts, etc. These surfactants are characterized by good foam, but their cleaning ability is strong, and they will clean the skin indiscriminately. When cleaning skin dirt, they will also clean the beneficial ingredients of the skin, such as sebum membranes, cholesterol in intercellular lipids, etc. Long-term use of such products will damage the skin barrier and make the skin fragile and prone to allergies. This is consistent with the phenomenon that the number of people with allergic skin in cities has increased significantly in recent years.

[0003] It is a consensus in the cosmetics field that excessive use of cleaning products can cause damage to the skin. Existing cleaning products either do not pay attention to this or reduce irritation by adding some plant soothing ingredients to the products. However, as a wash-off product, this type of plant soothing ingredient cannot really be retained in the skin, and in fact its effect is often very poor. In essence, how to selectively retain the beneficial ingredients secreted by the skin itself during cleansing can make the cleaning product gentle and not harmful to the skin.

[0004] Cholesterol is a beneficial component secreted by human skin. It exists in the intercellular lipids of the skin and is an important component of the skin barrier. Therefore, the selective retention of cholesterol by cleaning products during cleaning can be considered an important indicator of its mildness. Most cleaning products on the market do not pay attention to this direction. When cleaning the dirt on the surface of the skin, they will also indiscriminately remove beneficial components such as cholesterol on the skin, resulting in injuries while washing. Summary of the invention

[0005] The main technical problem solved by the present invention is to provide a surfactant composition with selective cleaning effect. The surfactant composition of the present invention has the unique performance of selective cleaning, which can effectively reduce the removal of cholesterol by cleaning products, thereby minimizing the damage to the skin during the cleaning process and effectively improving the mildness of the product.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0007] A surfactant composition with selective cleaning effect, comprising several surfactants with low cleaning ability (cholesterol cleaning amount) for cholesterol, specifically comprising sodium lauroyl aspartate, disodium cocoyl glutamate and / or sodium cocoyl glutamate, PEG-80 sorbitan laurate, glycolipid and oligofructose. The glycolipid is a bio-fermentation source glycolipid purchased from Wanhua Chemical Group, model BIO-RL1, and the oligofructose is purchased from Guangzhou Baifu Runhua Industrial Co., Ltd., model AML.

[0008] Sodium cocoyl glutamate can be partially converted into a mixture of sodium cocoyl glutamate and disodium cocoyl glutamate under liquid conditions. Therefore, the components of disodium cocoyl glutamate and / or sodium cocoyl glutamate in the present invention can be a mixture of disodium cocoyl glutamate and sodium cocoyl glutamate, or a monomer of sodium cocoyl glutamate.

[0009] Furthermore, the surfactant composition with selective cleaning effect of the present invention comprises the following components in percentage by weight:

[0010] Sodium lauroyl aspartate: 0-60%;

[0011] Disodium cocoyl glutamate and / or sodium cocoyl glutamate: 0-60%;

[0012] PEG-80 sorbitan laurate: 0-15%;

[0013] Glycolipids: 0-15%;

[0014] Fructooligosaccharides: 0-10%.

[0015] Furthermore, the surfactant composition with selective cleaning effect of the present invention comprises the following components in percentage by weight:

[0016] Sodium lauroyl aspartate: 35-40%;

[0017] Disodium cocoyl glutamate and / or sodium cocoyl glutamate: 35-40%;

[0018] PEG-80 sorbitan laurate: 10-15%;

[0019] Glycolipids: 10-15%;

[0020] Fructooligosaccharides: 5-10%.

[0021] Further, the surfactant composition with selective cleaning effect of the present invention comprises the following components in percentage by weight:

[0022] Sodium lauroyl aspartate: 35%;

[0023] Disodium cocoyl glutamate and / or sodium cocoyl glutamate: 35%;

[0024] PEG-80 sorbitan laurate: 15%;

[0025] Glycolipids: 10%;

[0026] Fructo-oligosaccharides: 5%.

[0027] The method for preparing the surfactant composition with selective cleaning effect of the present invention comprises the following steps:

[0028] At room temperature, the required amount of surfactants of each component is stirred and mixed in an emulsifying pot.

[0029] It has been verified that the surfactant composition with selective cleaning effect of the present invention can reduce the cleaning power of other surfactants on cholesterol, thereby reducing overall skin irritation. When used in facial cleansers and other skin-contacting toiletries, the mildness of the product can be improved. Therefore, the surfactant composition with selective cleaning effect of the present invention can be used to prepare toiletries, especially facial cleansers, where the effect is most prominent. DETAILED DESCRIPTION

[0030] In order to allow those skilled in the art to understand the present invention more clearly and intuitively, the present invention will be further described below.

[0031] The selective cleaning action of the surfactant composition of the present invention is achieved by selective retention of cholesterol. A large number of surfactants were investigated for their cholesterol removal ability.

[0032] The experiment is divided into two parts. The first part tests the cleaning ability of a single surfactant on cholesterol. The stronger the cleaning ability, the worse the score. The second part is to select high-quality surfactants and combine their foam performance, cleaning ability, etc. to form a surfactant composition, which is then added to a base material with high cleaning ability for cholesterol to evaluate the impact of the base material on cholesterol cleaning ability.

[0033] Part 1: Testing the ability of different surfactants to remove cholesterol adhering to leather

[0034] Test method:

[0035] 1. Cut the cowhide leather into 4*4cm squares, dry them in an oven at 105℃ for 4h, and weigh them.

[0036] 2. Take 1g of cholesterol and dissolve it in 9g of anhydrous ethanol. Take 1g of the dissolved cholesterol and drop it on the leather. Then dry it at 105℃ for 2h and weigh it.

[0037] 3. Place the cholesterol leather in a 100ml beaker, add 50ml of the raw material solution with a mass concentration of 1%, ultrasonicate it in an ultrasonic device for 40min (ultrasonicator 1300ml water), take it out, wash it 3 times, add 50ml of purified water and ultrasonicate it for 5min.

[0038] 4. Take out and dry at 105℃ for 5h, then weigh.

[0039] 5. Calculate the elution efficiency (elution efficiency = weight of cholesterol washed away / weight of total cholesterol attached*100%).

[0040] The test results are as follows:

[0041] Table 1 The cleaning ability of individual ingredients on cholesterol:

[0042]

[0043]

[0044] Among them, glycolipids were purchased from Wanhua Chemical Group with the bio-fermentation source, model BIO-RL1, and oligofructose was purchased from Guangzhou Baifu Runhua Industry Co., Ltd., model AML.

[0045] According to the above data, combined with the cleaning ability of the raw materials on dirt, foaming performance, and washing feeling, the final selected composition is: sodium lauroyl aspartate, disodium cocoyl glutamate and / or sodium cocoyl glutamate, PEG-80 sorbitan laurate, glycolipids, and oligofructose.

[0046] Part II: Testing the effects of different amounts of the above surfactant compositions on other surfactants

[0047] The test was conducted with potassium cocoyl glycinate as the base material, according to the weight percentage: 80% potassium cocoyl glycinate and 20% surfactant composition.

[0048] The specific ratio is shown in Table 2.

[0049] Table 2

[0050]

[0051] The effects of the composition groups in Table 2 on the cholesterol cleaning ability of potassium cocoyl glycinate are shown in Table 3.

[0052] Table 3 Cholesterol cleaning ability test of different test groups

[0053] Test Group name Cholesterol cleansing Test Group A 100% Potassium Cocoyl Glycinate 14.57％ Test Group B 80% Potassium Cocoyl Glycinate + 20% Composition ① 11.05％ Test Group C 80% Potassium Cocoyl Glycinate + 20% Composition ② 10.82％ Test Group D 80% Potassium Cocoyl Glycinate + 20% Composition ③ 13.35％ Test Group E 80% Potassium Cocoyl Glycinate + 20% Composition ④ 13.27％ Test Group F 80% Potassium Cocoyl Glycinate + 20% Composition ⑤ 12.30％ Test Group G 80% Potassium Cocoyl Glycinate + 20% Composition ⑥ 9.46％

[0054] It can be concluded from the above data that the surfactant composition of the present invention can effectively reduce the amount of cholesterol removed by conventional surfactants, thereby improving the mildness of the cleaning product.

[0055] Similarly, with potassium cocoyl glycinate as the base material, the test was conducted according to the weight percentage: 80% potassium cocoyl glycinate and 20% surfactant composition. The stain removal ability was verified by using a dirty cloth test. The above solution was prepared into a concentration of 5% and tested. △ 0.2% standard laundry detergent was used as a reference. The dirty cloth used was a commercially available standard JB-03 sebum-stained cloth. The higher the ratio, the stronger the cleaning ability.

[0056]

[0057] It can be seen from the above table that the composition of the present invention does not reduce the detergency of the original surfactant, and can even improve this ability.

[0058] The above description of the embodiments is to facilitate the understanding and application of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the embodiments herein, and improvements and modifications made to the present invention by those skilled in the art based on the disclosure of the present invention should be within the scope of protection of the present invention.

Claims

1. A surfactant composition having a selective cleaning effect, characterized in that: Including sodium lauroyl aspartate, PEG-80 sorbitan laurate, glycolipids and oligofructose. The weight percentage of the sodium lauroyl aspartate in the surfactant composition is 35-60%; The weight percentage of the PEG-80 sorbitan laurate in the surfactant composition is 10-15%; The weight percentage of the glycolipid in the surfactant composition is 10-15%; The weight percentage of the oligofructose in the surfactant composition is 5-10%.

2. A surfactant composition with selective cleaning effect as claimed in claim 1, characterized in that: The composition comprises the following weight percentages: Sodium lauroyl aspartate: 35~40%; Disodium cocoyl glutamate and / or sodium cocoyl glutamate: 35~40%; PEG-80 sorbitan laurate: 10%~15%; Glycolipids: 10-15%; Fructooligosaccharides: 5~10%.

3. A surfactant composition with selective cleaning effect as claimed in claim 2, characterized in that: The composition comprises the following weight percentages: Sodium lauroyl aspartate: 35%; Disodium Cocoyl Glutamate and / or Sodium Cocoyl Glutamate: 35%; PEG-80 sorbitan laurate: 15%; Glycolipids: 10%; Fructo-oligosaccharides: 5%.

4. A surfactant composition having a selective cleaning effect, characterized in that: The composition comprises the following weight percentages: 60% Disodium Cocoyl Glutamate / Sodium Cocoyl Glutamate, 15% PEG-80 Sorbitan Laurate, 15% Glycolipids, 10% Fructooligosaccharides.

5. The method for preparing a surfactant composition having a selective cleaning effect according to any one of claims 1 to 4, characterized in that: The steps include: At room temperature, the required amount of surfactants of each component is stirred and mixed in an emulsifying pot.

6. Use of a surfactant composition with selective cleaning effect as claimed in any one of claims 1 to 4 as a compound surfactant in the preparation of toiletries.

7. The use according to claim 6, characterized in that The toiletries include facial soap, facial cleanser, facial cream, facial foam, shower gel, hand soap, cleansing cream and makeup remover oil.

8. A toiletries product, characterized in that: The invention comprises a surfactant composition with selective cleaning effect as described in any one of claims 1 to 4.

Images