High-viscosity organic silicon emulsifier as well as preparation method and application thereof
A high-viscosity organosilicon emulsifier was prepared by hydrosilylation and crosslinking reaction of low-hydrogen silicone oil, allyl polyether and platinum catalyst, which solved the problem of high-viscosity polysiloxanes being difficult to disperse and emulsify in aqueous systems, and achieved the formation of stable emulsions and high stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-27
- Publication Date
- 2026-04-14
AI Technical Summary
High-viscosity polysiloxanes are difficult to disperse and emulsify in aqueous systems. Conventional surfactants are unable to effectively reduce the interfacial tension between oil and water, resulting in large emulsion particle size, poor stability, and easy stratification, which limits their application.
Low-hydrogen silicone oil, allyl polyether, and platinum catalyst are used to carry out hydrosilylation reaction, followed by crosslinking with TMPTA/AMA or TMPME to form a high-viscosity organosilicon emulsifier. A network structure is constructed through hydrosilylation and crosslinking reaction to ensure emulsification effect.
The prepared high-viscosity organosilicon emulsifier can effectively emulsify high-viscosity polysiloxanes to form a stable emulsion. It does not break the emulsion in centrifugation tests at room temperature and does not break the emulsion after standing at 60°C for 1-3 months, which significantly improves the stability and particle size control of the emulsion.
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Figure CN121851391A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of organosilicon chemicals technology, and in particular to a high-viscosity organosilicon emulsifier, its preparation method, and its application. Background Technology
[0002] Polyurethane leather (PU leather) is a type of synthetic leather that possesses properties similar to natural leather, including good strength, abrasion resistance, cold resistance, breathability, aging resistance, and solvent resistance. Furthermore, PU leather is soft to the touch and aesthetically pleasing, making it an ideal alternative to natural leather in the clothing, footwear, bag, and furniture industries.
[0003] Hand feel and abrasion resistance are key indicators of leather durability. Using high-molecular-weight silicone emulsions to improve the hand feel is a common method. Polysiloxanes, due to their unique low surface energy, excellent softness, and chemical inertness, are widely used as hand feel agents, softeners, or mold release agents. High-viscosity polysiloxanes, in particular (such as 107 glue with a viscosity exceeding 1 million CP), can impart a superior and lasting smooth and soft hand feel to finished products.
[0004] However, high-viscosity polysiloxanes are oily and water-insoluble substances, and their extremely high viscosity makes dispersion and emulsification in aqueous systems exceptionally difficult. Conventional nonionic or anionic surfactants often fail to effectively reduce their oil-water interfacial tension, and the resulting emulsions typically suffer from large particle size, poor stability, and easy demulsification, severely limiting their application in aqueous systems. Summary of the Invention
[0005] This application provides a high-viscosity organosilicon emulsifier, its preparation method, and its application, which can efficiently emulsify high-viscosity polysiloxanes and form stable emulsions.
[0006] Firstly, the method for preparing a high-viscosity organosilicon emulsifier provided in this application adopts the following technical solution: A method for preparing a high-viscosity organosilicon emulsifier, wherein the organosilicon emulsifier has the following structural formula: In the formula, R1 is allyl polyether, and R2 is TMPTA / AMA or TMPMEE after the unsaturated double bonds are removed or the hydroxyl groups are removed. The raw materials for the organosilicon emulsifier include: low-hydrogen silicone oil, allyl polyether, TMPTA / AMA or TMPME; The preparation method of the organosilicon emulsifier includes the following steps: S1. Hydrosilylation reaction: Take low-hydrogen silicone oil, allyl polyether and platinum catalyst, stir and mix, heat to the preset temperature, and react fully until the viscosity is 5000-10000CP to obtain intermediate product; The ratio of the number of molar silane bonds in the low-hydrogen silicone oil to the number of molar allylic double bonds in the allyl polyether is 1:0.5 to 0.8. S2: Crosslinking reaction: Add TMPTA / AMA or TMPME to the intermediate product, maintain the preset temperature, stir and mix until the viscosity reaches 15000CP or higher, cool down and obtain the organosilicon emulsifier.
[0007] Furthermore, the preset temperature is set to 80–120°C.
[0008] Furthermore, the raw materials for the organosilicon emulsifier include: 80-120 parts of low-hydrogen silicone oil, 100-300 parts of allyl polyether, and 5-50 parts of TMPTA / AMA or TMPME.
[0009] Furthermore, the hydrogen content of the low-hydrogen silicone oil is 0.05% to 0.5%, and the molecular weight of the low-hydrogen silicone oil is 5000 to 50000.
[0010] Furthermore, the structural formula of the allyl polyether is: In the formula, the subscripts d and e represent the degree of polymerization of ethylene oxide (EO) and propylene oxide (PO), with subscript d ranging from 10 to 100 and subscript e ranging from 10 to 100. R3 is the end-capping group, selected from hydrogen atom, methyl, ethyl, propyl, or butyl.
[0011] Furthermore, the platinum catalyst comprises 10–15 ppm of the total mass.
[0012] Secondly, this application provides a high-viscosity organosilicon emulsifier, which is prepared using the above-mentioned preparation method.
[0013] Thirdly, this application provides the application of the above-mentioned high-viscosity organosilicon emulsifier in polysiloxane emulsions.
[0014] In summary, this application includes at least one of the following beneficial technical effects: The organosilicon emulsifier prepared by this invention has the function of emulsifying high-viscosity polysiloxanes, and the resulting polysiloxane emulsion exhibits good stability. Experimental results show that when polysiloxane emulsions containing the organosilicon emulsifier of this invention are centrifuged at room temperature, the organosilicon emulsifier does not break down after 30 minutes at a speed of 3000 r / min, and does not break down after standing at 60°C for 1 to 3 months. Attached Figure Description To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a product image of an intermediate product; Figure 2 This is a product image of silicone emulsifier; Figure 3 It is the infrared spectrum of the intermediate product and the organosilicon emulsifier. Detailed Implementation
[0016] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0017] Those skilled in the art will understand that, unless otherwise stated, the terms "the," "the," and "the foregoing" used in this application may also include plural forms. It should be further understood that the word "comprising" as used in the specification of this application means the presence of the stated features, steps, or operations, but does not exclude the presence or addition of one or more other features, integers, or steps.
[0018] Those skilled in the art will understand that, where specific experimental steps or conditions are not specified in the embodiments, they can be performed according to the conventional experimental steps or conditions described in the literature in this field; and where the manufacturers of the raw materials or instruments and equipment used are not specified, they are all conventional products that can be obtained commercially.
[0019] Those skilled in the art will understand that, unless otherwise stated in this application, when numerical ranges are given in the embodiments, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this application, as well as the prior art known to those skilled in the art and the descriptions in this application, can be implemented using any prior art methods, devices, and materials similar to or equivalent to those described, used, or made by means of methods, devices, and materials in the embodiments of this application.
[0020] A raw material for preparing a high-viscosity organosilicon emulsifier comprises: 80-120 parts of low-hydrogen silicone oil, 100-300 parts of allyl polyether, and 5-50 parts of TMPTA / AMA or TMPME.
[0021] A method for preparing a high-viscosity organosilicon emulsifier, comprising the following steps: S1. Hydrosilylation reaction: Take low-hydrogen silicone oil, allyl polyether and platinum catalyst, stir and mix, heat to the preset temperature, and react fully until the viscosity is 5000-10000CP to obtain intermediate product.
[0022] The structural formula of the intermediate product obtained by the hydrosilylation reaction is shown below: In the formula, R1 is allyl polyether and R2 is H.
[0023] The ratio of the number of moles of silane-hydrogen bonds in the low-hydrogen silicone oil to the number of moles of allyl double bonds in the allyl polyether is 1:0.5 to 0.8.
[0024] The molar number of silane-hydrogen bonds exceeds that of the propenyl double bonds, resulting in the presence of residual silane-hydrogen bonds after the hydrosilylation reaction. These residual silane-hydrogen bonds then undergo cross-linking reactions with TMPTA / AMA or TMPME, causing TMPTA / AMA or TMPME to be grafted onto the intermediate product to form a complex network structure.
[0025] The ratio of the number of moles of silane bonds in the low-hydrogen silicone oil to the number of moles of allyl double bonds in the allyl polyether can be specifically set according to the actual situation, ensuring that after the hydrosilylation reaction, there are enough remaining silane bonds to crosslink with TMPTA / AMA or TMPME.
[0026] For example, the ratio of the number of moles of silane-hydrogen bonds in the low-hydrogen silicone oil to the number of moles of allyl double bonds in the allyl polyether is 1:0.5, 1:0.6, 1:0.7, or 1:0.8.
[0027] Furthermore, the low-hydrogen silicone oil has a hydrogen content of 0.05% to 0.5% and a molecular weight of 5000 to 50000. This ensures that the silicone oil has suitable reactivity and molecular weight to obtain ideal emulsifier properties.
[0028] The hydrogen content of low-hydrogen silicone oil can be understood as the mass percentage of silane-hydrogen bonds in the silicone oil. It can be achieved by adjusting the amount of silane-hydrogen bonds introduced to ensure that the concentration of silane-hydrogen bonds is precisely matched with the ratio of allyl polyether double bonds, thereby avoiding incomplete reactions or side reactions.
[0029] The molecular weight of low-hydrogen silicone oil can be understood as the length of the silicone oil molecular chain, which can be controlled by adjusting the degree of polymerization. This maintains suitable fluidity to promote uniform mixing, while providing sufficient molecular chain length to support subsequent cross-linking reactions to form a dense network structure.
[0030] The hydrogen content and molecular weight of low-hydrogen silicone oil can be specifically set according to actual conditions. The goal is to ensure the silicone oil has suitable reactivity and molecular weight to achieve ideal emulsifier performance. For example, the hydrogen content of low-hydrogen silicone oil can be set to 0.1%, 0.2%, 0.3%, 0.4%, or 0.5%, and the molecular weight can be set to 5000, 10000, etc.
[0031] The type of low-hydrogen silicone oil is specifically set according to the actual situation. Low-hydrogen silicone oil includes one or more of side-hydrogen silicone oil, terminal-hydrogen silicone oil, and end-side-hydrogen silicone oil. Based on the addition of allyl polyether to the side of the low-hydrogen silicone oil, the low-hydrogen silicone oil in this embodiment is preferably side-hydrogen silicone oil.
[0032] Furthermore, the structural formula of allyl polyether is: In the formula, the subscripts d and e represent the degree of polymerization of ethylene oxide (EO) and propylene oxide (PO), with subscript d ranging from 10 to 100 and subscript e ranging from 10 to 100. R3 is the end-capping group, selected from hydrogen atom, methyl, ethyl, propyl, or butyl.
[0033] The subscript d value of 10 to 100 ensures that the ethylene oxide segments provide appropriate hydrophilicity, which not only promotes the dispersion ability of the emulsifier in the aqueous phase, but also avoids insufficient hydrophilicity due to low polymerization, which would result in ineffective wetting of the aqueous phase, or excessive water solubility due to high polymerization, which would weaken the interaction with the oil phase.
[0034] The subscript e has a value of 10 to 100 to ensure that the propylene oxide chain provides sufficient oleophilicity, enhances compatibility with high-viscosity polysiloxanes, and prevents insufficient oleophilicity from affecting the efficiency of hydrosilylation reaction when the polymerization is too low, or increased molecular chain rigidity from reducing the reactivity when the polymerization is too high.
[0035] R3 is a small molecule end-capping group such as hydrogen atom, methyl, ethyl, propyl or butyl, which maintains low steric hindrance at the molecule end, improves the reactivity of the allyl double bond, makes the hydrosilylation reaction more complete, and reduces the occurrence of side reactions, thereby improving the structural regularity and emulsion stability of the final emulsifier.
[0036] For example, the allyl polyether is a random copolymer with an EO / PO molar ratio of 1:1 (i.e., d=e) and an allyl polyether number-average molecular weight of 2000. In this case, the values of d and e are 19.
[0037] Furthermore, the platinum catalyst comprises 10-15 ppm of the total mass. This ensures that the platinum catalyst is uniformly distributed and effectively activated in the mixed system, guaranteeing the rapid initiation and complete conversion of the hydrosilylation reaction at the preset temperature. It also avoids reaction retardation due to insufficient catalyst or byproduct formation caused by excessive catalyst, thereby precisely controlling the degree of consumption of silane bonds and reserving an appropriate amount of stable reaction sites for subsequent crosslinking reactions.
[0038] The platinum catalyst is any one or more of the following: platinum-alcohol complex, platinum-olefin complex, platinum-alkoxide complex, platinum-ether complex, platinum-ketone complex, isopropanol solution of chloroplatinic acid, and platinum-vinyl complex.
[0039] The appropriate type of platinum catalyst is selected based on the specific circumstances of the reaction. For example, a chloroplatinic acid isopropanol solution is selected as the platinum catalyst, specifically a mixed solution of chloroplatinic acid and isopropanol in a mass ratio of 1:10.
[0040] S2: Crosslinking reaction: Add TMPTA / AMA or TMPME to the intermediate product, maintain the preset temperature, stir and mix until the viscosity reaches 15000CP or higher, cool down and obtain the organosilicon emulsifier.
[0041] For example, the viscosity testing instrument used in this embodiment is an NDJ-8S.
[0042] Furthermore, the preset temperature is set to 80–120°C.
[0043] By limiting the preset temperature to the range of 80–120°C, the hydrosilylation reaction stage can be precisely matched to the activity window of the platinum catalyst. This avoids the reaction stalling due to the excessively slow binding rate of allyl double bonds to hydroxyl bonds at low temperatures, while suppressing side reactions such as oxidation or crosslinking of allyl polyethers initiated at high temperatures. During the crosslinking reaction stage, this temperature range effectively promotes the directional condensation of remaining hydroxyl bonds with TMPTA / AMA or TMPME, thereby constructing a dense and uniform network spatial structure.
[0044] Specifically, the structural formula of the organosilicon emulsifier obtained through the crosslinking reaction is shown below: In the formula, R1 is allyl polyether, and R2 is TMPTA / AMA or TMPME after the unsaturated double bonds are removed or the hydroxyl groups are removed.
[0045] Specifically, unsaturated double bonds represent allyl and acrylate double bonds.
[0046] TMPTA contains three acrylate groups. When TMPTA (trimethylolpropane triacrylate) undergoes a crosslinking reaction with intermediates, it undergoes an addition reaction with the Si-H carbon-carbon double bond. AMA (allyl methacrylate) contains both methacrylate and allyl groups. The allyl group generally has higher hydrosilylation reactivity than the methacrylate double bond, and the Si-H bond preferentially reacts with the terminal allyl double bond of AMA. TMPME (trimethylolpropane monoallyl ether) contains two hydroxyl groups. The Si-H bond undergoes a dehydrogenation condensation reaction with the hydroxyl group of TMPME.
[0047] It should be noted that a, b, and c in the figure represent the degree of polymerization. Because the degree of cross-linking of the network structure formed is different, the emulsifier generated is a mixture. Therefore, the degree of polymerization cannot be constrained by a specific value or range. However, the molecular weight of the final emulsifier product can be determined to be 20,000 to 50,000.
[0048] Based on the aforementioned organosilicon emulsifier, this application further provides a polysiloxane emulsion and its preparation method, as follows: A polysiloxane emulsion, the raw materials of which include 60 parts of polysiloxane, 10-30 parts of fatty alcohol polyoxyethylene ether emulsifier, and 10-50 parts of the above-mentioned organosilicon emulsifier.
[0049] The polysiloxane includes, but is not limited to, one or more of 107 rubber (room temperature vulcanizing methyl silicone rubber), methyl silicone oil and methyl vinyl silicone rubber raw rubber. The viscosity of the polysiloxane is preferably 5 million to 20 million CP, specifically 10 million CP or 15 million CP. A method for preparing a polysiloxane emulsion, comprising stirring the raw materials in the above proportions, wherein the stirring speed is preferably set to 100-500 rpm / min and the stirring time is preferably 2-6 h.
[0050] The present application will be further explained below with reference to the embodiments. Example 1: S1. Hydrosilylation reaction: Take 100g of hydrosilicone oil with a hydrogen content of 0.1%, a molecular weight of 5000, and a viscosity of 100cps, and 100g of allyl polyether. Stir and heat to 85℃, add 0.02g of isopropanol chloroplatinic acid solution (a mixed solution of chloroplatinic acid and isopropanol in a mass ratio of 1:10), stir and mix, and continue to heat to 90℃. When the material reacts until it is completely transparent, the intermediate product is obtained.
[0051] S2: Crosslinking reaction: Add 10g TMPTA to the intermediate product, maintain the temperature at 100℃, stir and mix until the material becomes a transparent fluid, cool down, and obtain the organosilicon emulsifier A.
[0052] Take 60g of 10 million cp viscosity polysiloxane, 30g of organosilicon emulsifier A, and 10g of AE0-9 emulsifier, and stir at 1000 rpm for 3 hours to obtain high molecular weight organosilicon emulsion A.
[0053] Example 2: S1. Hydrosilylation reaction: Take 100g of hydrosilicone oil with a hydrogen content of 0.1%, a molecular weight of 5000, and a viscosity of 100cps, and 80g of allyl polyether. Stir and heat to 85℃, add 0.02g of isopropanol chloroplatinic acid solution (a mixed solution of chloroplatinic acid and isopropanol in a mass ratio of 1:10), stir and mix, and continue to heat to 90℃. When the material reacts until it is completely transparent, the intermediate product is obtained.
[0054] S2: Crosslinking reaction: Add 10g TMPME to the intermediate product, maintain the temperature at 100℃, stir and mix until the material becomes a transparent fluid, cool down, and obtain the organosilicon emulsifier B.
[0055] Take 60g of 10 million cp viscosity polysiloxane, 30g of organosilicon emulsifier B, and 10g of AE0-9 emulsifier, and stir at 1000 rpm for 3 hours to obtain high molecular weight organosilicon emulsion B.
[0056] Example 3: S1. Hydrosilylation reaction: Take 120g of hydrogen-containing silicone oil with a hydrogen content of 0.3%, a molecular weight of 5000, and a viscosity of 100cps, and 300g of allyl polyether. Stir and heat to 85℃, add 0.06g of isopropanol chloroplatinic acid solution (a mixed solution of chloroplatinic acid and isopropanol in a mass ratio of 1:10), stir and mix, and continue to heat to 90℃. When the material reacts until it is completely transparent, the intermediate product is obtained.
[0057] S2: Crosslinking reaction: Add 30g TMPTA to the intermediate product, maintain the temperature at 100℃, stir and mix until the material becomes a transparent fluid, cool down, and obtain the organosilicon emulsifier C.
[0058] Take 60g of 10 million cp viscosity polysiloxane, 30g of organosilicon emulsifier C, and 10g of AE0-9 emulsifier, and stir at 1000 rpm for 3 hours to obtain high molecular weight organosilicon emulsion C.
[0059] Example 4: S1. Hydrosilylation reaction: Take 80g of hydrogen-containing silicone oil with a hydrogen content of 0.5%, a molecular weight of 5000, and a viscosity of 100cps, and 300g of allyl polyether. Stir and heat to 85℃, add 0.04g of isopropanol chloroplatinic acid solution (a mixed solution of chloroplatinic acid and isopropanol in a mass ratio of 1:10), stir and mix, and continue to heat to 90℃. When the material reacts until it is completely transparent, the intermediate product is obtained.
[0060] S2: Crosslinking reaction: Add 30g AMA to the intermediate product, maintain the temperature at 100℃, stir and mix until the material becomes a transparent fluid, cool down, and obtain the organosilicon emulsifier D.
[0061] Take 60g of 10 million cp viscosity polysiloxane, 30g of organosilicon emulsifier D, and 10g of AE0-9 emulsifier, and stir at 1000 rpm for 3 hours to obtain high molecular weight organosilicon emulsion D.
[0062] Example 5: S1. Hydrosilylation reaction: Take 120g of hydrogen-containing silicone oil with a hydrogen content of 0.5%, a molecular weight of 5000, and a viscosity of 100cps, and 300g of allyl polyether. Stir and heat to 85℃, add 0.05g of isopropanol chloroplatinic acid solution (a mixed solution of chloroplatinic acid and isopropanol in a mass ratio of 1:10), stir and mix, and continue to heat to 90℃. When the material reacts until it is completely transparent, the intermediate product is obtained.
[0063] S2: Crosslinking reaction: Add 50g TMPME to the intermediate product, maintain the temperature at 100℃, stir and mix until the material becomes a transparent fluid, cool down, and obtain the organosilicon emulsifier E.
[0064] Take 60g of 10 million cp viscosity polysiloxane, 30g of organosilicon emulsifier E, and 10g of AE0-9 emulsifier, and stir at 1000 rpm for 3 hours to obtain high molecular weight organosilicon emulsion E.
[0065] Comparative Example 1: Take 60g of 10 million cp viscosity polysiloxane, 30g of commercially available 10 million cp viscosity water-soluble silicone oil, and 10g of AE0-9 emulsifier, and stir at high speed of 1000 rpm for 3 hours to obtain high molecular weight organosilicon emulsion M.
[0066] Comparative Example 2: Take 60g of 10 million cp viscosity polysiloxane, 30g of BASF TO-5 emulsifier, 30g of BASF TO-10 emulsifier, and stir at high speed of 1000 rpm for 3 hours to obtain high molecular weight organosilicon emulsion N.
[0067] Note: The polysiloxane used in Examples 1-5 and Comparative Examples 1-2 is 10 million viscosity 107, purchased from Shenzhen Jipeng Silicon Fluorine Materials Co., Ltd.
[0068] The high molecular weight organosilicon emulsions prepared in Implementation 1-2 were centrifuged at room temperature with a rotation speed of 3000 r / min and a test time of 30 min. The test showed that neither high molecular weight organosilicon emulsions A nor B broke down.
[0069] Based on this, Examples 1-2 and Comparative Examples 1-2 were further selected for stability testing and particle size testing at 60°C. The results are shown in Table 1.
[0070] Table 1 According to the results in Table 1, emulsions A and B prepared by Examples 1 and 2 have better stability and smaller and finer particle size than emulsions C and D prepared by the comparative examples.
[0071] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.
Claims
1. A method for preparing a high-viscosity organosilicon emulsifier, characterized in that, The structural formula of the organosilicon emulsifier is: In the formula, R1 is allyl polyether, and R2 is TMPTA / AMA or TMPME after the unsaturated double bonds are removed or the hydroxyl groups are removed. The raw materials for the organosilicon emulsifier include: low-hydrogen silicone oil, allyl polyether, TMPTA / AMA or TMPME; The preparation method of the organosilicon emulsifier includes the following steps: S1. Hydrosilylation reaction: Take low-hydrogen silicone oil, allyl polyether and platinum catalyst, stir and mix, heat to the preset temperature, and react fully until the viscosity is 5000-10000CP to obtain intermediate product; The ratio of the number of molar silane bonds in the low-hydrogen silicone oil to the number of molar allylic double bonds in the allyl polyether is 1:0.5 to 0.
8. S2: Crosslinking reaction: Add TMPTA / AMA or TMPME to the intermediate product, maintain the preset temperature, stir and mix until the viscosity reaches 15000CP or higher, cool down and obtain the organosilicon emulsifier.
2. The preparation method according to claim 1, characterized in that, The preset temperature is set to 80-120℃.
3. The preparation method according to claim 1, characterized in that, The raw materials for the organosilicon emulsifier include: 80-120 parts of low-hydrogen silicone oil, 100-300 parts of allyl polyether, and 5-50 parts of TMPTA / AMA or TMPME.
4. The preparation method according to claim 3, characterized in that, The low-hydrogen silicone oil has a hydrogen content of 0.05% to 0.5% and a molecular weight of 5000 to 50000.
5. The preparation method according to claim 3, characterized in that, The structural formula of the allyl polyether is: In the formula, the subscripts d and e represent the degree of polymerization of ethylene oxide (EO) and propylene oxide (PO), with subscript d ranging from 10 to 100 and subscript e ranging from 10 to 100. R3 is the end-capping group, selected from hydrogen atom, methyl, ethyl, propyl, or butyl.
6. The preparation method according to claim 1, characterized in that, The platinum catalyst accounts for 10-15 ppm of the total mass.
7. A high-viscosity organosilicon emulsifier, characterized in that, It is prepared by the preparation method according to any one of claims 1-6.
8. The application of the high-viscosity organosilicon emulsifier according to claim 7 in polysiloxane emulsions.