A weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agent and preparation method thereof

Abstract

The present invention relates to a weather-resistant and scratch-resistant super-hydrophobic organosilicon waterproofing agent and a preparation method thereof, and belongs to the technical field of organosilicon waterproofing materials. The organosilicon waterproofing agent comprises the following components by weight: 1 to 10 parts of hydroxy silicone oil, 1 to 10 parts of vinyl silicone oil, 1 to 5 parts of amino silicone oil, 1 to 3 parts of a first silane coupling agent, 1 to 5 parts of a second silane coupling agent, 1 to 3 parts of nano-silica, 80 to 100 parts of a solvent, and 0.001 to 1 part of a catalyst. The organosilicon waterproofing agent of the present invention can be widely used on the surfaces of various building materials and can quickly make the surface of the substrate achieve a super-hydrophobic effect. It can also achieve a long-term weather-resistant effect and possess excellent weather-resistant and scratch-resistant properties. In addition, the preparation process of the waterproofing agent of the present invention uses simple and inexpensive industrial raw materials, the production process is economical and efficient, the production process is simple to operate, the production energy consumption is low, and it is easy to scale industrial production.

Description

Technical Field

[0001] The present invention belongs to the technical field of organic silicon waterproof materials, and particularly relates to an organic silicon waterproof agent capable of making the surface of a building substrate super-hydrophobic and weather-resistant and scratch-resistant, and a preparation method of the waterproof agent. Background Art

[0002] Superhydrophobic materials are those with a water droplet contact angle greater than 150° and a rolling angle less than 10°. Due to their unique surface microstructure, superhydrophobic materials not only possess exceptional water repellency but also often exhibit self-cleaning, surface antifouling, anti-icing, corrosion resistance, and drag reduction properties. Therefore, superhydrophobic waterproofing agents are high-performance, highly functional, and highly value-added products in building waterproofing.

[0003] The formation of super-hydrophobic materials requires two indispensable factors: a material that reduces the surface energy of the substrate and a micro-nanostructure constructed on the substrate surface. In practical applications, due to factors such as environmental erosion, chemical corrosion, mechanical wear, and UV aging, the super-hydrophobic coating on the substrate surface can easily wear away the low-surface-energy components or destroy the micro-nanostructure, ultimately leading to a weakening or even loss of super-hydrophobic properties.

[0004] Currently, mainstream super-hydrophobic coating construction methods include sol-gel method, self-assembly method, chemical vapor deposition method, etching method, blending method, etc. However, the preparation cost of super-hydrophobic coating, the difficulty of preparation process, and the mechanical and chemical stability of coating remain problems that need to be solved urgently. For example, the existing patent CN117844370A, a silicone waterproofing agent for ultra-high performance concrete panels and its preparation method, can achieve long-term water resistance, but the mechanical properties and weather resistance of its coating still need to be further improved. Therefore, the development of a new silicone waterproofing agent that can make the surface of building substrates super-hydrophobic and weather-resistant and scratch-resistant has great significance and application potential. Summary of the Invention

[0005] The present invention aims to provide a silicone waterproofing agent that can make the surface of a building substrate super-hydrophobic and weather-resistant and scratch-resistant, and a preparation method of the waterproofing agent, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a weather-resistant and scratch-resistant super-hydrophobic organosilicon waterproofing agent. The waterproofing agent comprises, in parts by weight, 1 to 10 parts of hydroxy silicone oil, 1 to 10 parts of vinyl silicone oil, 1 to 5 parts of amino silicone oil, 1 to 3 parts of a first silane coupling agent, 1 to 5 parts of a second silane coupling agent, 1 to 3 parts of nano-silica, 80 to 100 parts of a solvent, and 0.001 to 1 part of a catalyst; wherein the first silane coupling agent is a mercaptosilane coupling agent having a mercapto functional group.

[0008] Preferably, the waterproofing agent includes component A and component B, wherein component A includes, by weight: 1 to 10 parts of hydroxy silicone oil, 1 to 10 parts of vinyl silicone oil, 1 to 5 parts of amino silicone oil, 1 to 3 parts of a first silane coupling agent, 1 to 5 parts of a second silane coupling agent, and 1 to 3 parts of nano-silica; and component B includes, by weight: 0.001 to 1 part of a catalyst.

[0009] Preferably, the viscosity of the hydroxy silicone oil is in the range of 50 to 1000 cst.

[0010] Preferably, the viscosity of the vinyl silicone oil is in the range of 50 to 1000 cst, and the vinyl content is in the range of 0.3% to 1%.

[0011] Preferably, the viscosity of the amino silicone oil is in the range of 10 to 500 cst, and the ammonia value is in the range of 0.1 to 1.0 mmol / g.

[0012] Preferably, the first silane coupling agent is at least one of mercaptosilane coupling agents having a mercapto functional group, such as γ-mercaptopropyltriethoxysilane and γ-mercaptopropyltrimethoxysilane.

[0013] Preferably, the nano-silica is hydrophilic fumed silica with a particle size ranging from 10 to 200 nanometers.

[0014] Preferably, the second silane coupling agent is at least one of γ-aminopropyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, n-octyltriethoxysilane, and methyltriethoxysilane.

[0015] Preferably, the catalyst is at least one of azobisisobutyronitrile, dibenzoyl peroxide, benzoin dimethyl ether, camphorquinone, thioxanthone, benzophenone and its derivatives, and tetrabutylammonium bromide.

[0016] The present invention also provides a method for preparing any of the above-mentioned weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agents, comprising the following steps:

[0017] Step 1. At room temperature, add hydroxy silicone oil, vinyl silicone oil, amino silicone oil, and a first silane coupling agent into a reaction vessel, and stir and mix them uniformly at room temperature to obtain a mixed silicone oil;

[0018] Step 2. Add nano-silica to the mixed silicone oil and stir to mix evenly into a paste;

[0019] Step 3. Heat the reaction container and stir to mature the paste;

[0020] Step 4. Add the second silane coupling agent to the paste of step 3 and stir to mix evenly;

[0021] Step 5. Add an organic solvent to the paste of step 4, stir and dilute to obtain component A of the organosilicon waterproofing agent;

[0022] Step 6. diluting the catalyst in an organic solvent to obtain component B of the organosilicon waterproofing agent.

[0023] Preferably, the weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agent is made of the following components in parts by weight: 1 to 10 parts of hydroxy silicone oil, 1 to 10 parts of vinyl silicone oil, 1 to 5 parts of amino silicone oil, 1 to 3 parts of a first silane coupling agent, 1 to 5 parts of a second silane coupling agent b, 1 to 3 parts of nano-silica, 80 to 100 parts of an organic solvent, and 0.001 to 1 part of a catalyst.

[0024] Preferably, the nano-silica in step 2 is added to the mixed silicone oil in batches, more preferably in 3-5 batches, which is more conducive to uniform mixing.

[0025] Preferably, the heating temperature in step 3 is 40-80° C. and the heating time is 2-8 hours.

[0026] Preferably, the organic solvent in step 5 is at least one of ethanol, isopropanol, n-hexane, cyclohexane, n-heptane, petroleum ether, No. 120 gasoline, D60, ethyl acetate, and butyl acetate.

[0027] Preferably, when the paste is diluted with a solvent in step 5, the mass ratio of the solvent to the paste is 5 to 15:1, and the more preferred dilution time is 30 to 60 minutes to further ensure uniform dilution.

[0028] Preferably, the organic solvent in step 6 is at least one of ethanol, isopropanol, n-hexane, cyclohexane, n-heptane, petroleum ether, No. 120 gasoline, D60, ethyl acetate, and butyl acetate, and more preferably the solvent is the same as the solvent in step 5.

[0029] Preferably, when a solvent is used to dilute the catalyst in step 6, the mass ratio of the solvent to the catalyst is 5:1 to 10:1, and the more preferred dilution time is 10 to 30 minutes to further ensure uniform dilution.

[0030] The application method of the organosilicon waterproofing agent of the present invention comprises preparing the organosilicon waterproofing agent component A and component B in a weight ratio of 15 to 25:1, stirring and mixing the organosilicon waterproofing agent component A and component B uniformly, and then treating the surface of the building substrate with the mixed waterproofing agent.

[0031] In the technical solution of the present invention, hydroxyl silicone oil, amino silicone oil, and vinyl silicone oil can be used as low surface energy materials to act on the surface of the building substrate to form a low surface energy silicone water-repellent film on the surface of the substrate. Moreover, due to the presence of a large number of hydroxyl groups on the surface of the hydrophilic nano-silica and the building substrate, the first silane coupling agent and the second silane coupling agent can react with the silica, hydroxyl silicone oil, and the substrate surface to modify the silica, thereby fixing the nano-silica. The nano-silica is evenly fixed on the substrate, changing the microscopic nanostructure of the substrate surface, so that the substrate surface can achieve a super-hydrophobic effect.

[0032] In the technical solution of the present invention, the first silane coupling agent, mercaptosilane coupling agent in step 1, can react with the hydrophilic silica in step 2 by heating and aging in step 3, so that the alkoxy end of the coupling agent is condensed with the hydroxyl end of the hydrophilic silica, thereby modifying the hydrophilic silica. Figure 1 The mercaptosilane coupling agent is added in step 1 to ensure that the first silane coupling agent is preferentially condensed onto the hydrophilic silica in step 3 and does not compete with the second silane coupling agent in step 4.

[0033] In the technical solution of the present invention, the second silane coupling agent in step 4 fully modifies the hydrophilic silica in step 2 to ensure complete hydrophobic modification of the hydrophilic silica.

[0034] In the technical solution of the present invention, after the organic silicone waterproofing agent component A and component B are mixed, under the action of the catalyst of component B, the olefin of the vinyl silicone oil in component A and the mercapto group of the modified nano-silica modified by the first silane coupling agent mercaptosilane coupling agent will quickly undergo a "click reaction" to form a bond, such as Figure 2 As shown. Because the alkoxy group at one end of the thiol-containing coupling agent connects to silica, and the thiol group at the other end forms a bond with the vinyl silicone oil, the silica and silicone oil are connected, strengthening the nanostructure of the substrate surface. Macroscopically, this significantly enhances the waterproofing agent's weathering and scratch resistance. Furthermore, by separating components A and B and mixing them before use, the present invention effectively prevents stratification of the mixed solution caused by prolonged storage after mixing, thereby facilitating long-term storage.

[0035] In the technical solution of the present invention, hydroxy silicone oil with a viscosity range of 50 to 1000 cst, vinyl silicone oil with a viscosity range of 50 to 1000 cst, and amino silicone oil with a viscosity range of 10 to 500 cst are used. The selection of silicone oil in this viscosity range is conducive to the uniform and stable dispersion of nano-silica in the silicone oil paste, ensuring the full reaction of hydrophilic nano-silica with the silane coupling agent, and also ensuring the stability of the paste after dilution.

[0036] In the technical solution of the present invention, the heating and aging process can cause the silicone oil silane and white carbon black to pre-react, modify the hydrophilic white carbon black to be hydrophobic, and at the same time stabilize the physical and chemical properties of the paste, reduce the viscosity of the paste, make the paste easier to be diluted by organic solvents, improve the stability of the paste after dilution, and ensure the uniformity and stability of the waterproofing agent during long-term storage.

[0037] Compared with the prior art, the advantages and beneficial effects of the present invention are: compared with existing waterproofing agent products, the organosilicon waterproofing agent of the present invention can react rapidly after being applied to the surface of the building substrate, quickly making the substrate surface have a super-hydrophobic effect, and has excellent weather resistance and scratch resistance, showing long-term water repellency, and possessing excellent mechanical stability (anti-scratch), chemical stability (acid and alkali resistance), thermal stability (high temperature resistance), and anti-icing performance. The waterproofing agent of the present invention has a wide range of applications and can also be applied to building materials such as stone, wood, concrete substrates, high-performance concrete boards, and cement fiber boards. The waterproofing agent of the present invention has stable properties, low cost, is easy to store for a long time, and has excellent storage stability. At the same time, the waterproofing agent preparation method of the present invention uses simple and cheap industrial raw materials, the production process is economical and efficient, the production process is simple to operate, the production energy consumption is low, the production equipment requirements are low, and it is easy to large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Attachment Figure 1 This is a schematic diagram of the reaction of modifying white carbon black with the first silane coupling agent of the present invention;

[0039] Attachment Figure 2 Schematic diagram of the "Click reaction" between the vinyl silicone oil of the present invention and the white carbon black modified with the first silane coupling agent;

[0040] Attachment Figure 3 1 is a comparison diagram of the super-hydrophobic effect of Example 19 of the present invention on a cement fiber board; the upper figure in the figure is a rendering of the effect of a blank cement fiber board not coated with a waterproofing agent, and the lower figure is a rendering of the hydrophobic effect of a cement fiber board coated with a waterproofing agent;

[0041] Attachment Figure 4 1 is a comparison diagram of the super-hydrophobic effect of Example 19 of the present invention on aerated concrete; the upper figure in the figure is a rendering of the effect of blank aerated concrete without coating the waterproofing agent, and the lower figure is a rendering of the hydrophobic effect of aerated concrete coated with the waterproofing agent;

[0042] Attachment Figure 5 1 is a comparison diagram of the superhydrophobic effect of Example 19 of the present invention on a high-performance concrete slab; the upper figure in the figure is a rendering of the effect of a blank high-performance concrete slab not coated with a waterproofing agent, and the lower figure is a rendering of the hydrophobic effect of a high-performance concrete slab coated with a waterproofing agent;

[0043] Attachment Figure 6 This is a diagram showing the super-hydrophobic effect of a cement substrate after aging experiment in Example 19 of the present invention;

[0044] Attachment Figure 7 This is a diagram showing the effect of an aging experiment on a cement substrate treated with a waterproofing agent product without adding a mercaptosilane coupling agent according to the present invention. DETAILED DESCRIPTION

[0045] In order to better clarify and understand the purpose, process scheme and advantages of the present invention, the technical scheme and implementation method of the present invention are further clearly, completely and in detail described below through specific examples and in combination with the accompanying drawings. It should be noted that the embodiments described in the present invention are implemented on the premise of the technical scheme of the present invention, and detailed implementation methods and specific operating processes are given, but they are only part of the embodiments of the present invention, not all of the embodiments. The specific implementation methods described are limited to illustrating and explaining the present invention and do not limit the present invention. Based on the embodiments in the present invention, all other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] Unless otherwise specified, the experimental methods and conditions used in the following examples are conventional methods and conventional conditions. The materials, reagents, or instruments used in the examples are all commercially available unless otherwise specified. The reaction conditions embodied in the summary of the invention are all capable of achieving the described reactions and obtaining products with the desired effects. Due to space limitations, only some examples are listed below to further illustrate the advantages of the technical solutions of the present invention.

[0047] Example 1

[0048] Weigh 15g of linear silicone oil (PMX-0156), 2g of γ-mercaptopropyltriethoxysilane, 15g of vinyl silicone oil (100 cst, 1% vinyl content), and 3g of amino silicone oil (RJ-WP58) into a reaction vessel and stir for 30 minutes until uniformly mixed, preferably at a stirring rate of 500 rpm. Add 9g of hydrophilic nano-silica in three batches and stir to form a paste. Heat to 60°C and stir for 4 hours. Then, add 10g of the silane coupling agent, n-octyltriethoxysilane, and stir for 1 hour until uniformly mixed. Dilute the paste with D60 solvent oil in three batches until it reaches a 10% by weight solution, thus obtaining a 10% effective content of Component A of this type of silicone water repellent.

[0049] Weigh 5 g of benzoin dimethyl ether and 30 g of D60 solvent oil into a reaction container, stir and mix them evenly to obtain waterproof component B.

[0050] Weigh 150g of waterproofing agent component A and 7g of waterproofing agent component B, stir and mix them evenly, and apply them on various building substrates. This can make the surface of the building substrate produce a superhydrophobic effect and have certain weather resistance and scratch resistance. The performance effect is equivalent to that of Example 19.

[0051] Example 2-10

[0052] On the basis of Example 1, the raw material types were kept unchanged and the process conditions were changed. The reaction results are shown in the following table:

[0053]

[0054] Note: The "surface coating effect" in the table includes superhydrophobic effect and weather resistance and anti-scratch effect; "good" means that the performance effect is basically equivalent to that of Example 19; "sample storage stability" means that the sample is stored on the shelf at room temperature (15°C-35°C) for 6 months without uneven phenomena such as cross-linking, precipitation, delamination, and agglomeration, and it still has a superhydrophobic effect when used on cement fiber board, and it is considered to have storage stability for at least 6 months.

[0055] Examples 11-18

[0056] On the basis of Example 1, the production process was kept unchanged, and the selection of some raw materials was changed. The reaction results are shown in the following table:

[0057]

[0058] Note: The "surface coating effect" in the table includes superhydrophobic effect and weather resistance and anti-scratch effect; "good" means that the performance effect is basically equivalent to that of Example 19; "sample storage stability" means that the sample is stored on the shelf at room temperature (15°C-35°C) for 6 months without uneven phenomena such as cross-linking, precipitation, delamination, and agglomeration, and it still has a superhydrophobic effect when used on cement fiber board, and it is considered to have storage stability for at least 6 months.

[0059] Example 19

[0060] Weigh 75g of linear silicone oil (PMX-0156), 10g of γ-mercaptopropyltriethoxysilane, 75g of vinyl silicone oil (100 cst, 1% vinyl content), and 15g of amino silicone oil (RJ-WP58) into a reaction vessel and stir for 30 minutes to mix thoroughly. Add 45g of hydrophilic nano-silica in three batches and stir to mix thoroughly to form a paste. Heat to 60°C and stir for 4 hours. Then, add 50g of the silane coupling agent n-octyltriethoxysilane and stir to mix thoroughly. Dilute the paste with D60 solvent oil in three batches until it reaches a 10% by weight solution, thus obtaining a 10% effective content of Component A of this type of silicone water repellent.

[0061] Weigh 25 g of benzoin dimethyl ether and 150 g of D60 solvent oil into a reaction container, stir and mix them evenly to obtain waterproof component B.

[0062] Weigh 150g of waterproofing agent component A and 7g of waterproofing agent component B, stir and mix evenly, apply them on the cement fiber board, and test the surface coating effect after curing.

[0063] Product testing methods and results

[0064] The waterproofing agent samples used in the following superhydrophobic effect test, weather resistance and anti-scratch performance test, and product stability test were prepared in Example 19.

[0065] Experiment 1: Superhydrophobic effect test

[0066] The hybrid organosilicon waterproofing agent prepared in the present invention was evenly applied to the surfaces of various building panels, including cement fiberboard, aerated concrete, and high-performance concrete panels. After 48 hours of indoor curing, a water droplet test was conducted, and the contact angle test showed a 165° droplet effect. The droplets did not adhere to the substrate surface. When the panel was slightly tilted, water quickly slid off the coating surface without leaving any water stains, indicating that the waterproofing agent produces a superhydrophobic effect. Figure 3-5 The images of water droplets on various building panels before and after coating show that the panels coated with the waterproofing agent have a significantly superior super-hydrophobic effect. Furthermore, the super-hydrophobic effect is achieved after 24 hours of curing, and curing for 2-3 days further ensures that the super-hydrophobic effect is maintained long-term after use.

[0067] A mixed silicone waterproofing agent was evenly applied to the surface of a cement fiberboard. A microsyringe was used to push a water droplet into contact with the coating, squeeze it, and finally separate it. The coating surface did not adhere to the water droplet. Furthermore, a drop of water was dropped onto the coating surface and bounced off without adhering to the surface, demonstrating the coating's low water adhesion.

[0068] Experiment 2: Weather resistance and scratch resistance test

[0069] The cement fiberboard coated with the water repellent of Example 19 was subjected to the following test of Experiment 2.

[0070] Weathering test was carried out in the aging box. The aging test conditions were: xenon lamp radiation intensity 1000W / m 2 , blackboard temperature 60 ℃, humidity 70%, test for 60 days, the super hydrophobicity of the waterproofing agent of Example 19 of the present invention is maintained, and the contact angle is 160°, as shown in FIG. Figure 6 At the same time, a waterproofing agent product without adding a mercapto coupling agent (ie, Example 13, using n-octyl triethoxysilane instead of γ-mercaptopropyl triethoxysilane, with other raw materials and processes unchanged) was used as a comparison. After the same aging conditions, the contact angle was only 135°, as shown in FIG. Figure 7 shown.

[0071] Weathering tests were carried out in a freeze-thaw chamber, maintaining a cycle from -20°C to room temperature. After 30 days of treatment, the superhydrophobicity was maintained and the contact angle was slightly reduced to 150°.

[0072] In the water jet test, the water flow at a specific pressure was kept at an inclination angle of 45° to the coating. The water pressure was flushed for 30 minutes. The superhydrophobic property was maintained and the contact angle was slightly reduced to 150°.

[0073] In the water droplet impact test, the coated cement fiber board was placed on a sample table with an inclination angle of 45°. A water droplet with a volume of 8μL fell from a height of 10cm and hit the coating surface. After 10,000 water droplet impacts, the superhydrophobic performance was maintained, and the contact angle was slightly reduced to 150°.

[0074] In the corrosion resistance test, the cement fiberboard treated with this waterproofing agent was immersed in a dilute hydrochloric acid solution with a pH of 5 for 24 hours. After acid treatment, the superhydrophobic properties of the waterproof coating were maintained, and the contact angle was slightly reduced to 150°.

[0075] Experiment 3: Product stability test

[0076] The sample of Example 19 was stored on a shelf at room temperature (15°C-35°C) for 6 months without showing any unevenness such as cross-linking, coagulation, stratification, or agglomeration. Furthermore, it still had a superhydrophobic effect when used on cement fiberboard, and was considered to have storage stability for at least 6 months.

[0077] The sample of Example 19 was stored in an oven at 50°C for 15 days without any unevenness such as cross-linking, coagulation, or stratification. Furthermore, it still had a super-hydrophobic effect when used on cement fiberboard, indicating that it had a certain degree of thermal storage stability.

[0078] The sample of Example 19 was stored in a freeze-thaw box, and the freeze-thaw cycle program was set to -20°C for 16 hours, then heated to 25°C for 8 hours, and then cooled to -20°C. This cycle was repeated three times. No uneven phenomena such as cross-linking, coagulation, and stratification occurred, and the sample still had a superhydrophobic effect when used on cement fiberboard. It is believed that it has a certain low-temperature storage stability.

[0079] In summary, the organosilicon waterproofing agent of the present invention is used on the surface of a building substrate, can achieve a superhydrophobic effect on the surface of the substrate, and exhibits good resistance to ultraviolet aging, mechanical scratching, and corrosion in weathering tests, and has good storage stability.

[0080] The above examples are only a few specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, but may have many variations. All variations that can be directly derived or indirectly associated with the contents disclosed by a person skilled in the art should be considered to be within the scope of protection of the present invention.

Claims

1. A weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agent, characterized in that: The waterproofing agent comprises, by weight, 1-10 parts of hydroxy silicone oil, 1-10 parts of vinyl silicone oil, 1-5 parts of amino silicone oil, 1-3 parts of a first silane coupling agent, 1-5 parts of a second silane coupling agent, 1-3 parts of nano-silica, 80-100 parts of an organic solvent, and 0.001-1 part of a catalyst; wherein the first silane coupling agent is a mercaptosilane coupling agent having a mercapto functional group, and the nano-silica is a hydrophilic fumed silica with a particle size range of 10-200 nanometers; The viscosity of the hydroxy silicone oil is in the range of 50-1000 cst; the viscosity of the vinyl silicone oil is in the range of 50-1000 cst, and the vinyl content is 0.3%-1%; the viscosity of the amino silicone oil is in the range of 10-500 cst, and the ammonia value is 0.1-1.0 mmol / g; The second silane coupling agent is at least one of γ-aminopropyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, n-octyltriethoxysilane, and methyltriethoxysilane; The preparation method of the weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agent comprises the following steps: Step 1: uniformly mixing hydroxy silicone oil, vinyl silicone oil, amino silicone oil and a first silane coupling agent to obtain a mixed silicone oil; Step 2: Add nano-silica to the mixed silicone oil and mix evenly to form a paste; Step 3: Heat and mature the paste; Step 4: Add the second silane coupling agent to the paste of step 3 and mix well; Step 5: Add an organic solvent to the paste of step 4 and dilute it to obtain component A of the silicone waterproofing agent; Step 6: Add the catalyst into the organic solvent to obtain the organosilicon waterproofing agent component B.

2. A weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agent according to claim 1, characterized in that: The first silane coupling agent is at least one of γ-mercaptopropyltriethoxysilane and γ-mercaptopropyltrimethoxysilane.

3. A weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agent according to claim 1, characterized in that: The catalyst is at least one of azobisisobutyronitrile, dibenzoyl peroxide, benzoin dimethyl ether, camphorquinone, thioxanthone, benzophenone and its derivatives, tetrabutylammonium bromide, and alkylamine compounds.

4. A method for preparing the weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agent according to any one of claims 1 to 3, characterized in that: The steps include: Step 1: uniformly mixing hydroxy silicone oil, vinyl silicone oil, amino silicone oil and a first silane coupling agent to obtain a mixed silicone oil; Step 2: Add nano-silica to the mixed silicone oil and mix evenly to form a paste; Step 3: Heat and mature the paste; Step 4: Add the second silane coupling agent to the paste of step 3 and mix well; Step 5: Add an organic solvent to the paste of step 4 and dilute it to obtain component A of the silicone waterproofing agent; Step 6: Add the catalyst into the organic solvent to obtain the organosilicon waterproofing agent component B.

5. The method for preparing a weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agent according to claim 4, wherein: The heating temperature in step 3 is 40-80° C. and the heating time is 2-8 hours.

6. The method for preparing a weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agent according to claim 4, wherein: The mass ratio of the solvent to the paste in step 5 is 5-15:

1.

7. The method for preparing a weather-resistant and scratch-resistant super-hydrophobic silicone waterproofing agent according to claim 4, wherein: The mass ratio of the solvent to the catalyst in step 6 is 5 to 10:1.

Images