Preparation method and application of polymeric amino silicone oil emulsion

Abstract

The invention relates to a preparation method of a polymeric amino silicone oil emulsion. The preparation method comprises the following steps: putting a polysiloxane linear body, epoxy silicone oil, an emulsifier and deionized water into a reactor according to a certain proportion; and starting to stir for 30-60 minutes, so that the materials are uniformly stirred. Grinding the particle size at high pressure through a homogenizer, putting into a reactor after the particle size is qualified, heating to 70 DEG C, adding a catalyst and a silane coupling agent in a certain proportion, and stirring at constant temperature for 7-9 hours. And stopping heating, naturally cooling to 25 DEG C, adding a pH regulator to regulate the pH to 6.0-9.5, and stirring for 40-60 minutes at the rotating speed of 600-800rpm to enable the mixture to be uniform, thereby obtaining the stable amino silicon oil emulsion. The prepared amino silicone oil emulsion is sealed and stored at normal temperature and normal pressure, and after being stored for 2 months, the amino silicone oil emulsion is still milky white with blue light and has no layering phenomenon. Compared with a traditional cyclosiloxane polymerization process, the process has the advantages that firstly, the energy consumption is reduced, and the reaction time is shortened; 2, the stability of the emulsion is improved; and 3, the low-temperature film-forming property of the emulsion is obviously improved.

Description

Technical Field

[0001] The invention relates to a method for preparing a polymerized amino silicone oil emulsion, and belongs to the field of organic silicon daily chemical emulsions. Background Art

[0002] Amino silicone oil is a polydimethylsiloxane containing amino groups in the side chain or end group. Its structure has certain special properties. It has good adsorption, compatibility, low surface tension and other properties. When the side chain contains amino groups, it has strong polarity and positive charge. Because damaged hair loses its hydrophobic protective layer, the surface of the hair becomes hydrophilic and carries more negative charge, which makes it easier for amino silicone oil to adsorb on the surface of the hair, thus forming a comfortable protective film. Therefore, amino silicone oil emulsion can be used in various shampoo and hair care products. The oily group in amino silicone oil emulsion can make the hair hydrophobic, make the hair easy to dry, and can increase the gloss and antistatic properties of the hair, improve and repair the hair quality, and reduce the friction coefficient between the hair, which gives the hair good smoothness, softness and washability.

[0003] However, for high molecular weight amino silicone oil, when it is added to shampoo and conditioner products, due to its high viscosity, it is difficult to emulsify evenly and disperse in the system, which can easily lead to product stability problems or affect the product's use effect.

[0004] In addition, amino silicone oil emulsion is usually obtained by synthesizing amino silicone oil and then emulsifying it in industry. In order to solve the above technical problems, in the prior art, the invention patent with publication number CN 117986584 A discloses a special amino silicone oil emulsion preparation method, which is emulsified and polymerized by dimethylsiloxane mixed ring body DMC. The polymerization time is long and it needs to be heated step by step, and the whole reaction process is long. The present invention can stably prepare amino silicone oil emulsion by emulsifying the linear body and epoxy silicone oil and then performing emulsion polymerization without step-by-step heating. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a method for preparing a polymerized amino silicone oil emulsion. The raw materials used in the preparation method of the present invention are mainly linear polysiloxanes of Class C, which reduces the risk of experimental and production safety. The prepared aqueous amino silicone oil emulsion has a solid content of 30% to 40%, good fluidity, a storage period of more than 2 months (60 days), and an appearance of milky white with blue light.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A method for preparing a polymerized amino silicone oil emulsion comprises the following steps: (1) Add emulsifier and deionized water into the reactor in a certain proportion; start stirring for 30-60 minutes to make it evenly stirred; add polysiloxane linear body and epoxy silicone oil through the pipeline, stirring and adding, and control the flow rate at 5-10m 3 / h.

[0007] (2) Then the uniformly mixed materials are subjected to high pressure homogenization by a high pressure homogenizer; (3) After homogenization, put it into the reactor and heat it to 70-80°C, add a certain proportion of catalyst and silane coupling agent, and stir at a constant temperature of 200-400 rpm for 7-9 hours; (4) Then stop heating, cool naturally to 25°C, add a pH adjuster to adjust the pH to 6.0-9.5, stir at a speed of 200-300 rpm for 40-60 minutes to make it uniform, and a stable amino silicone oil emulsion can be obtained.

[0008] The linear polysiloxane viscosity is 40-150 cP, and the mass ratio of the linear polysiloxane is 20%~40%, preferably 25%~40%. The epoxy silicone oil viscosity is 10cP-60cP. The molecular weight of the epoxy silicone oil with a viscosity of 10cP is about 362; the epoxy silicone oil viscosity is 20, and the molecular weight is 800±50; the epoxy silicone oil viscosity is 30: the molecular weight is 1500±50; the epoxy silicone oil viscosity is 40: the molecular weight is 2400±50; the epoxy silicone oil viscosity is 50: the molecular weight is 3300±50; the epoxy silicone oil viscosity is 125cP and the molecular weight is 6000±50.

[0009] The emulsifiers are cationic emulsifiers and nonionic emulsifiers, wherein the mass ratio of the cationic emulsifier is 1% to 4%, and the mass ratio of the nonionic emulsifier is 1% to 10%.

[0010] Specifically, the cationic emulsifier is one or more of benzalkonium bromide, dodecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, and octadecyl trimethyl ammonium chloride. The nonionic emulsifier is one or more of isomeric tridecanol polyoxyethylene ether IT 1312, isomeric tridecanol polyoxyethylene ether E-1310, and isomeric tridecanol polyoxyethylene ether E-1309. The content is ≥99.7%.

[0011] The pH of the deionized water is 6.0-7.0, and the mass ratio of the deionized water is 50%-75%.

[0012] The stirring rate in step (1) is 100-800 rpm / min.

[0013] The high-pressure homogenization pressure of the homogenizer in step (2) is 75-85 MPa, and the homogenization is performed 2-3 times.

[0014] The catalyst in step (3) is one of potassium hydroxide, sodium hydroxide, tetramethylammonium hydroxide and tetrapropylammonium hydroxide. The mass ratio of the catalyst is 0.1% to 1%. The catalyst is diluted before use, and the dilution ratio is 45-55%.

[0015] The silane coupling agent in step (3) is one or more of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyltriethoxysilane. The mass ratio of the silane coupling agent is 1% to 3%. The silane coupling agent is diluted before use, and the dilution ratio is 40-50%.

[0016] The pH adjuster in step (4) is one of acetic acid and citric acid. The purity of the pH adjuster is ≥ 98.5%, and the mass ratio of the pH adjuster is 0.1% to 1%.

[0017] The amino silicone oil emulsion prepared by the method of the present invention has a milky white appearance with blue light and does not separate after being stored for 2 months (60 days). Through the above technical solution, the present invention has the following technical effects: The raw materials used in the process of the present invention are mainly Class C polysiloxane linear bodies, which reduces the safety risks of experiments and production. Polysiloxane linear bodies, epoxy silicone oil, emulsifier and deionized water are used to form a milky white emulsion with blue light under the action of a homogenizer. The emulsion polymerization and cross-linking are accelerated by adding a catalyst and a silane coupling agent and controlling the temperature to finally form a stable amino silicone oil emulsion. The use of a relatively low concentration of organic base makes the reaction conditions of the system mild, the reaction time is relatively short, the reaction temperature is low, and the production energy consumption and cost are reduced; at the same time, the addition of epoxy silicone oil can optimize the application performance of the amino silicone oil emulsion, so that the amino silicone oil emulsion has good dilution stability, centrifugal stability, thermal stability, freeze-thaw stability, and significantly improves the low-temperature film-forming property of the emulsion. In addition, when the product is added to shampoo and conditioner products, the smoothness of the hair is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The centrifugal effect diagram of amino silicone oil emulsion: (A) Example 2 has no stratification, and (B) Control Example 1 has slight stratification. DETAILED DESCRIPTION

[0019] The present invention is further explained below with reference to the examples, but the examples do not limit the present invention in any form. The materials and reagents used, unless otherwise specified, can be purchased through commercial channels.

[0020] Example 1 (1) Add 60 parts of deionized water, 3.6 parts of hexadecyl trimethyl ammonium chloride, and 7 parts of isotridecyl alcohol polyoxyethylene ether IT1312 into the reactor; start stirring for 40 minutes to make it evenly stirred. Then add 26 parts of polysiloxane linear body (Wacker, 60cP) and 1 part of 20cP epoxy silicone oil through the pipeline, stirring and adding, and control the flow rate at 10m 3 / h. Then, the mixture was homogenized twice by a high-pressure homogenizer at a pressure of 80 MPa to obtain a milky white emulsion with a blue light and an oil droplet size of D50 < 0.20 μm and D90 < 0.35 μm. (2) Transfer the material to the reactor and heat it to 70°C, slowly drop 0.4 parts of 50% tetramethylammonium hydroxide solution, stir evenly, add 1.6 parts of 50% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution, and stir at a constant temperature of 300 rpm for 6 hours; (3) Then stop heating, cool naturally to 25°C, add 0.4 parts of 40% pH adjuster to adjust the pH to 9.0-9.5, and stir at 300 rpm for 40-60 minutes to obtain a stable amino silicone oil emulsion.

[0021] Example 2 (1) Add 60 parts of deionized water, 3.6 parts of hexadecyl trimethyl ammonium chloride, and 7 parts of isotridecyl alcohol polyoxyethylene ether IT1312 into the reactor; start stirring for 40 minutes to make it evenly stirred. Then add 26 parts of polysiloxane linear body (Wacker, 60cP) and 1 part of 10cP epoxy silicone oil through the pipeline, stirring and adding, and control the flow rate at 10m 3 / h. Then, the mixture was homogenized twice by a high-pressure homogenizer at a pressure of 80 MPa to obtain a milky white emulsion with a blue light and an oil droplet size of D50 < 0.20 μm and D90 < 0.35 μm. (2) Transfer the material to the reactor and heat it to 70°C, slowly drop 0.4 parts of 45% tetramethylammonium hydroxide aqueous solution, stir evenly, add 1.6 parts of 50% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution, and stir at a constant temperature of 300 rpm for 6 hours; (3) Then stop heating, cool naturally to 25°C, add 0.4 parts of 40% pH adjuster to adjust the pH to 9.0-9.5, and stir at 300 rpm for 40-60 minutes to obtain a stable amino silicone oil emulsion.

[0022] Example 3 (1) Add 60 parts of deionized water, 3.6 parts of hexadecyl trimethyl ammonium chloride, and 7 parts of isotridecyl alcohol polyoxyethylene ether IT1312 into the reactor; start stirring for 40 minutes to make it evenly stirred. Then add 26 parts of polysiloxane linear body (Wacker, 60cP) and 1 part of 30cP epoxy silicone oil through the pipeline, stirring and adding, and control the flow rate at 10m 3 / h. Then, the mixture was homogenized twice by a high-pressure homogenizer at a pressure of 80 MPa to obtain a milky white emulsion with a blue light and an oil droplet size of D50 < 0.20 μm and D90 < 0.35 μm. (2) Transfer the material to the reactor and heat it to 70°C, slowly drop 0.4 parts of 45% tetramethylammonium hydroxide aqueous solution, stir evenly, add 1.6 parts of 50% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution, and stir at a constant temperature of 300 rpm for 6 hours; (3) Then stop heating, cool naturally to 25°C, add 0.4 parts of 40% pH adjuster to adjust the pH to 9.0-9.5, and stir at 300 rpm for 40-60 minutes to obtain a stable amino silicone oil emulsion.

[0023] Example 4 (1) Add 60 parts of deionized water, 3.6 parts of hexadecyl trimethyl ammonium chloride, and 7 parts of isotridecyl alcohol polyoxyethylene ether IT1312 into the reactor; start stirring for 40 minutes to make it evenly stirred. Then add 26 parts of polysiloxane linear body (Wacker, 60cP) and 1 part of 40cP epoxy silicone oil through the pipeline, stirring and adding, and control the flow rate at 10m 3 / h. Then, the mixture was homogenized twice by a high-pressure homogenizer at a pressure of 80 MPa to obtain a milky white emulsion with a blue light and an oil droplet size of D50 < 0.20 μm and D90 < 0.35 μm. (2) Transfer the material to the reactor and heat it to 70°C, slowly drop 0.4 parts of 45% tetramethylammonium hydroxide aqueous solution, stir evenly, add 1.6 parts of 50% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution, and stir at a constant temperature of 300 rpm for 6 hours; (3) Then stop heating, cool naturally to 25°C, add 0.4 parts of 40% pH adjuster to adjust the pH to 9.0-9.5, and stir at 300 rpm for 40-60 minutes to obtain a stable amino silicone oil emulsion.

[0024] Example 5 (1) Add 60 parts of deionized water, 3.6 parts of hexadecyl trimethyl ammonium chloride, and 7 parts of isotridecyl alcohol polyoxyethylene ether IT1312 into the reactor; stir for 40 minutes to make it evenly stirred. Then add 26 parts of polysiloxane linear body (Wacker, 60cP) and 1 part of 50cP epoxy silicone oil through the pipeline, stirring and adding, and control the flow rate at 10m 3 / h. Then, the mixture was homogenized twice by a high-pressure homogenizer at a pressure of 80 MPa to obtain a milky white emulsion with a blue light and an oil droplet size of D50 < 0.20 μm and D90 < 0.35 μm. (2) Transfer the material to the reactor and heat it to 70°C, slowly drop 0.4 parts of 45% tetramethylammonium hydroxide aqueous solution, stir evenly, add 1.6 parts of 50% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution, and stir at a constant temperature of 300 rpm for 6 hours; (3) Then stop heating, cool naturally to 25°C, add 0.4 parts of 40% pH adjuster to adjust the pH to 9.0-9.5, and stir at 300 rpm for 40-60 minutes to obtain a stable amino silicone oil emulsion.

[0025] Example 6 (1) Add 60 parts of deionized water, 3.6 parts of hexadecyl trimethyl ammonium chloride, and 7 parts of isotridecyl alcohol polyoxyethylene ether IT1312 into the reactor; start stirring for 40 minutes to make it evenly stirred. Then add 25 parts of polysiloxane linear body (Wacker, 60cP) and 2 parts of 10cP epoxy silicone oil through the pipeline, stirring and adding, and control the flow rate at 10m 3 / h. Then, the mixture was homogenized twice by a high-pressure homogenizer at a pressure of 80 MPa to obtain a milky white emulsion with a blue light and an oil droplet size of D50 < 0.20 μm and D90 < 0.35 μm. (2) Transfer the material to the reactor and heat it to 70°C, slowly drop 0.4 parts of 45% tetramethylammonium hydroxide aqueous solution, stir evenly, add 1.6 parts of 50% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution, and stir at a constant temperature of 300 rpm for 6 hours; (3) Then stop heating, cool naturally to 25°C, add 0.4 parts of 40% pH adjuster to adjust the pH to 9.0-9.5, and stir at 300 rpm for 40-60 minutes to obtain a stable amino silicone oil emulsion.

[0026] Example 7 (1) Add 60 parts of deionized water, 3.6 parts of hexadecyl trimethyl ammonium chloride, and 7 parts of isotridecyl alcohol polyoxyethylene ether IT1312 into the reactor; start stirring for 40 minutes to make it evenly stirred. Then add 26.5 parts of polysiloxane linear body (Wacker, 60cP) and 0.5 parts of 10cP epoxy silicone oil through the pipeline, stirring and adding, and control the flow rate at 10m 3 / h. Then, the mixture was homogenized twice by a high-pressure homogenizer at a pressure of 80 MPa to obtain a milky white emulsion with a blue light and an oil droplet size of D50 < 0.20 μm and D90 < 0.35 μm. (2) Transfer the material to the reactor and heat it to 70°C, slowly drop 0.4 parts of 45% tetramethylammonium hydroxide aqueous solution, stir evenly, add 1.6 parts of 50% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution, and stir at a constant temperature of 300 rpm for 6 hours; (3) Then stop heating, cool naturally to 25°C, add 0.4 parts of 40% pH adjuster to adjust the pH to 9.0-9.5, and stir at 300 rpm for 40-60 minutes to obtain a stable amino silicone oil emulsion.

[0027] Comparative Example 1 (1) Add 60 parts of deionized water, 3.6 parts of hexadecyl trimethyl ammonium chloride, and 7 parts of isotridecyl alcohol polyoxyethylene ether IT1312 into the reactor; stir for 40 minutes to make it evenly stirred. Then add 27 parts of polysiloxane linear body (Wacker, 60cP) through the pipeline, stirring and adding, and control the flow rate at 10m 3 / h. Then, the mixture was homogenized twice by a high-pressure homogenizer at a pressure of 80 MPa to obtain a milky white emulsion with a blue light and an oil droplet size of D50 < 0.20 μm and D90 < 0.35 μm. (2) Transfer the material to the reactor and heat it to 70°C, slowly drop 0.4 parts of 45% tetramethylammonium hydroxide aqueous solution, stir evenly, add 1.6 parts of 50% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution, and stir at a constant temperature of 300 rpm for 6 hours; (3) Then stop heating, cool naturally to 25°C, add 0.4 parts of 40% pH adjuster to adjust the pH to 9.0-9.5, and stir at 300 rpm for 40-60 minutes to obtain a stable amino silicone oil emulsion.

[0028] Comparative Example 2 (1) Add 60 parts of deionized water, 3.6 parts of hexadecyl trimethyl ammonium chloride, and 7 parts of isotridecyl alcohol polyoxyethylene ether IT1312 into the reactor; start stirring for 40 minutes to make it evenly stirred. Then add 26 parts of polysiloxane linear body (Wacker, 60cP) and 1 part of 125cP epoxy silicone oil through the pipeline, stirring and adding, and control the flow rate at 10m 3 / h. Then, the mixture was homogenized twice by a high-pressure homogenizer at a pressure of 80 MPa to obtain a milky white emulsion with a blue light and an oil droplet size of D50 < 0.20 μm and D90 < 0.35 μm. (2) Transfer the material to the reactor and heat it to 70°C, slowly drop 0.4 parts of 45% tetramethylammonium hydroxide aqueous solution, stir evenly, add 1.6 parts of 50% N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution, and stir at a constant temperature of 300 rpm for 6 hours; (3) Then stop heating, cool naturally to 25°C, add 0.4 parts of 40% pH adjuster to adjust the pH to 9.0-9.5, stir at 300 rpm for 40-60 min, and a stable amino silicone oil emulsion can be obtained. 250 ml of the polymerized amino silicone oil emulsion prepared in Examples 1-7 and Comparative Examples 1-2 was sampled and tested. The test results are shown in Table 1.

[0029] Table 1 List of related properties of polymerized amino silicone oil emulsion

[0030] It can be seen from the results in Table 1 that the present invention can obtain an amino silicone oil emulsion with an ammonia value between 0.02-0.1 Meq / g and a particle size D50 < 0.2 by optimizing the type of emulsifier and the emulsification process parameters.

[0031] In addition, the polymerized amino silicone oil emulsions prepared in the above-mentioned Examples 1 to 7 and Comparative Examples 1 to 2 were subjected to dilution stability, centrifugal stability test, storage stability test, thermal stability test, and freeze-thaw stability test. The dilution stability test method is as follows: 10 ml of the emulsion is placed in a beaker, diluted 50 times and 100 times with pure water, mixed evenly, and observed whether there is obvious stratification. The centrifugal test method is as follows: 20 ml of the emulsion is placed in a 30 ml centrifuge tube, centrifuged at 3000 and 4000 rpm for 15 min, and the stratification of the emulsion is observed. The storage stability test method is as follows: 200 ml of the emulsion sample is placed at room temperature for 2 months, and the stratification of the emulsion is observed. The thermal stability test method is as follows: 200 ml of the emulsion sample is placed in a 50 ° C oven at a constant temperature for 3 weeks, and the stratification of the emulsion is observed. The freeze-thaw stability test method is as follows: 200 ml of the emulsion sample is placed in a refrigerator at -15 ° C for continuous freezing for 16 hours, and thawed at room temperature for 8 hours; cycle 5 times, and observe the stratification of the emulsion. The test results are shown in Table 2.

[0032] Table 2 Stability performance of polymerized amino silicone oil emulsion

[0033] From the results in Table 2, it can be seen that the dilution stability, centrifugal stability, storage stability, thermal stability and freeze-thaw stability of the amino silicone oil emulsion prepared in each embodiment of the present invention are better than those of the control example. It can be seen that the stability of amino silicone oil can be improved by adding epoxy silicone oil.

[0034] Take 10 ml of each of the amino silicone oil emulsions prepared in the above examples and control examples and place them in a watch glass in a low temperature environment at 0-10°C. Place them for 8 hours and then take them out for observation. The results are shown in Table 3. Table 3 Evaluation results of dry and wet hair feel

[0035] From the results in Table 2, it can be seen that the low-temperature film-forming property of the amino silicone oil emulsion prepared from the linear body can be improved by adding epoxy silicone oil.

[0036] In addition, the amino silicone oil emulsions prepared in the above examples and control examples were used to prepare shampoo, and the content of the amino silicone oil emulsion in the shampoo was 5 wt %. The shampoo proportions are shown in Table 4.

[0037] Table 4 Shampoo Ratio List

[0038] 36 volunteers were selected, 4 in each group, for a total of 9 groups. The volunteers washed their hair according to the above shampoo ratios, and were judged according to Table 5. The results were averaged and the results are shown in Table 6.

[0039] Table 5 Evaluation scores of dry and wet hair feel

[0040] Table 6 Evaluation results of dry and wet hair feel

[0041] From the above results, it can be seen that amino silicone oil emulsion can make hair soft and smooth. Among them, Examples 6, 7 and Comparative Example 2 added epoxy silicone oils of different proportions and viscosities. Although the corresponding amino silicone oil emulsions have good stability, they are not good in the feel of dry and wet hair. It can be seen that adding epoxy silicone oil can improve the smoothness of amino silicone oil emulsions on hair in washing and care products.

[0042] In summary, the addition of epoxy silicone oil can improve the stability of amino silicone oil emulsion, significantly improve the low-temperature film-forming property of the emulsion, and optimize the smooth feel of amino silicone oil emulsion on wet and dry hair.

[0043] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for preparing a polymerized amino silicone oil emulsion, characterized in that: The following steps are involved: (1) Add polysiloxane linear body, epoxy silicone oil, emulsifier and water into the reactor in a certain proportion and stir evenly; (2) The uniformly mixed material is then subjected to high pressure homogenization by a homogenizer; (3) After homogenization, the temperature is raised, and a certain proportion of catalyst and silane coupling agent are added for stirring reaction; (4) After the reaction is completed, the pH is adjusted to 6.0-9.5, and a stable polymerized amino silicone oil emulsion is obtained after stirring.

2. The method for preparing the polymerizable amino silicone oil emulsion according to claim 1, characterized in that: The viscosity of the linear polysiloxane is 40-150 cP, the mass ratio of the linear polysiloxane is 20%-40%, preferably 25%-40%; the viscosity of the epoxy silicone oil is 10 cP-60 cP.

3. The method for preparing the polymerizable amino silicone oil emulsion according to claim 1, characterized in that: The emulsifier is a cationic emulsifier and a nonionic emulsifier, wherein the mass ratio of the cationic emulsifier is 1% to 4%, and the mass ratio of the nonionic emulsifier is 1% to 10%; The cationic emulsifier is one or more of benzalkonium bromide, dodecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride and octadecyltrimethylammonium chloride; The nonionic emulsifier is one or more of isomeric tridecanol polyoxyethylene ether IT 1312, isomeric tridecanol polyoxyethylene ether E-1310, and isomeric tridecanol polyoxyethylene ether E-1309.

4. The method for preparing the polymerizable amino silicone oil emulsion according to claim 1, characterized in that: In step (2), the high-pressure homogenization pressure of the homogenizer is 75-85 MPa, and the homogenization is performed 2-3 times.

5. The method for preparing the polymerizable amino silicone oil emulsion according to claim 1, characterized in that: The catalyst in step (3) is one of potassium hydroxide, sodium hydroxide, tetramethylammonium hydroxide and tetrapropylammonium hydroxide; the mass ratio of the catalyst is 0.1% to 1%.

6. The method for preparing the polymerizable amino silicone oil emulsion according to claim 1, characterized in that: The silane coupling agent in step (3) is one or more of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane; the mass ratio of the silane coupling agent is 1% to 3%.

7. The method for preparing the polymerizable amino silicone oil emulsion according to claim 1, characterized in that: The pH adjuster in step (4) is one of acetic acid and citric acid; the purity of the pH adjuster is ≥98.5%, and the mass ratio of the pH adjuster is 0.1%~1%.

8. The polymerized amino silicone oil emulsion prepared by the preparation method according to any one of claims 1 to 7, characterized in that: The prepared emulsion has a milky white appearance with blue light, a particle size of less than 0.25 μm, a non-volatile matter content of 30% to 38%, and a pH of 7.0 to 9.

5.

9. Use of the polymerized amino silicone oil emulsion according to claim 8 in the preparation of shampoo and / or conditioner.

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