Silicone oil-based emulsion, preparation method and application thereof, and modified water-based wood paint

Abstract

The invention belongs to the technical field of water-based paint, and particularly relates to silicone oil-based emulsion, a preparation method and application thereof and modified water-based wood paint. The silicone oil-based emulsion provided by the invention comprises the following preparation raw materials in percentage by mass: 40-65% of silicone oil, 12-35% of an emulsifier, 15-25% of water and 0.05-0.5% of acetic acid. The silicone oil comprises polydimethyl silicone oil and / or hydroxyl silicone oil; the viscosity of the silicone oil ranges from 50000 cps to 850000 cps. According to the invention, high-viscosity polydimethyl silicone oil and / or hydroxyl silicone oil are / is taken as a core main raw material, and the compatibility with the water-borne wood paint is remarkably improved under the combined action of a specific amount of emulsifier and acetic acid, so that the wear resistance and scratch resistance of the water-borne wood paint are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of waterborne paints, and particularly relates to a silicone oil-based emulsion, a preparation method and application thereof, and a modified waterborne wood paint. Background Art

[0002] Waterborne wood paint is a wood paint using water as a thinner, which has environmental protection characteristics such as low odor and low volatile organic compounds (VOC), and is favored by more and more consumers.

[0003] At present, the main advantages of waterborne wood paint products on the market are good environmental protection and low price, but the fatal disadvantage is low hardness, easy to scratch and poor wear resistance. Therefore, at present, waterborne wood paint has only been successfully applied in home decoration or ordinary furniture, and this shortcoming seriously restricts its application in high-end products. In order to improve the wear and scratch resistance of waterborne wood paint, mainly by adding additives to it, but the existing wear and scratch resistant additives still have limited improvement in wear and scratch resistance and still need to be improved. Summary of the Invention

[0004] In view of this, the present invention provides a silicone oil-based emulsion, a preparation method and application thereof, and a modified waterborne wood paint. The silicone oil-based emulsion provided by the present invention has good compatibility with waterborne wood paint, and the preparation raw materials are inexpensive; using the silicone oil-based emulsion provided by the present invention as a wear and scratch resistant additive for waterborne wood paint can significantly improve its wear and scratch resistance.

[0005] In order to solve the above technical problems, the present invention provides a silicone oil-based emulsion, which comprises the following preparation raw materials in mass percentage:

[0006]

[0007] The silicone oil includes polydimethylsiloxane and / or hydroxy silicone oil; the viscosity of the silicone oil is 50,000 - 850,000 cps.

[0008] Preferably, the viscosity of the polydimethylsiloxane is 50,000 - 500,000 cps;

[0009] The viscosity of the hydroxy silicone oil is 100,000 - 850,000 cps.

[0010] Preferably, when the silicone oil is polydimethylsiloxane and hydroxy silicone oil, the mass ratio of the polydimethylsiloxane to the hydroxy silicone oil is 10 - 50:10 - 50.

[0011] Preferably, the emulsifier includes a non-ionic surfactant and / or a polyether modified silicone.

[0012] Preferably, when the emulsifier is a non-ionic surfactant and a polyether-modified silicone, the mass ratio of the non-ionic surfactant to the polyether-modified silicone is 0.9-2:1.

[0013] Preferably, the non-ionic surfactant includes fatty alcohol polyoxyethylene ether.

[0014] The present invention also provides a method for preparing the silicone oil-based emulsion described in the above technical solution, including the following steps:

[0015] Mix silicone oil, emulsifier, water and acetic acid to obtain the silicone oil-based emulsion.

[0016] Preferably, the mixing includes the following steps:

[0017] Perform the first kneading on the silicone oil and the emulsifier to obtain a first mixture;

[0018] Under the condition of the second kneading, add water and acetic acid dropwise to the first mixture to obtain the silicone oil-based emulsion.

[0019] The present invention also provides the application of the silicone oil-based emulsion described in the above technical solution as an abrasion-resistant and scratch-resistant additive in waterborne wood coatings.

[0020] The present invention also provides a modified waterborne wood coating, including an abrasion-resistant and scratch-resistant additive;

[0021] The abrasion-resistant and scratch-resistant additive is the silicone oil-based emulsion described in the above technical solution.

[0022] The present invention provides a silicone oil-based emulsion, which comprises preparation raw materials with the following mass percentages: 40-65% silicone oil, 12-35% emulsifier, 15-25% water, 0.05-0.5% acetic acid; the silicone oil includes polydimethylsiloxane and / or hydroxy silicone oil; the viscosity of the silicone oil is 50,000-850,000 cps. In the present invention, the polydimethylsiloxane has good lubricity and low surface energy. During the film-forming process of waterborne wood coatings, it can form a microscopic lubricating film on the surface of the paint film. When the paint film is subjected to friction or scratching, the lubricating film can reduce the friction coefficient and the frictional force between the external object and the paint film, thereby reducing the possibility of damage to the paint film caused by scratching and enhancing the wear and scratch resistance. The hydroxy silicone oil molecule contains active hydroxy functional groups. When the waterborne wood coating forms a film, the hydroxy functional groups of the hydroxy silicone oil can undergo condensation reactions or crosslinking reactions with the active groups (such as carboxyl groups, epoxy groups, etc.) on the resin molecules in the wood coating. Through this reaction, the hydroxy silicone oil molecules are interconnected with the resin molecules and participate in constructing the three-dimensional network structure of the paint film, enhancing the cohesion and hardness of the paint film. The paint film with improved hardness and cohesion can better resist deformation and damage when subjected to external forces, thereby improving the wear and scratch resistance. The present invention uses high-viscosity polydimethylsiloxane and / or hydroxy silicone oil as the core main raw materials, and significantly improves its compatibility with waterborne wood coatings under the combined action of a specific amount of emulsifier and acetic acid, thereby enhancing the wear and scratch resistance of waterborne wood coatings as an additive. Detailed Embodiments

[0023] The present invention provides a silicone oil-based emulsion, which comprises preparation raw materials with the following mass percentages:

[0024]

[0025]

[0026] The silicone oil includes polydimethylsiloxane and / or hydroxy silicone oil; the viscosity of the silicone oil is 50,000-850,000 cps.

[0027] In terms of mass percentage, the preparation raw materials of the silicone oil-based emulsion provided by the present invention include 40-65% silicone oil, which can also be 59-63%, and can specifically be 59%, 60%, 61%, 62% or 63%. In the present invention, the silicone oil can include polydimethylsiloxane and / or hydroxy silicone oil, and can specifically be polydimethylsiloxane and hydroxy silicone oil; when the silicone oil is polydimethylsiloxane and hydroxy silicone oil, the mass ratio of the polydimethylsiloxane to the hydroxy silicone oil can be 10-50:10-50, and can also be 1-2.8:1, and can specifically be 1:1, 1.9:1, 2.0:1, 2.6:1 or 2.7:1.

[0028] As a specific embodiment of the present invention, the viscosity of the polydimethylsiloxane can be 50,000 to 500,000 cps, and can also be 120,000 to 350,000 cps; specifically, it can be 180,000 cps, 200,000 cps, 300,000 cps or 450,000 cps.

[0029] As a specific embodiment of the present invention, the viscosity of the hydroxy silicone oil can be 100,000 to 850,000 cps, and can also be 120,000 to 650,000 cps; specifically, it can be 500,000 cps, 600,000 cps, 650,000 cps or 800,000 cps.

[0030] The present invention limits the silicone oil viscosity within the above range, which can enable the silicone oil to exhibit good film-forming characteristics and excellent lubrication effects, thereby improving the wear resistance of the silicone oil-based emulsion and effectively reducing the friction coefficient during actual application.

[0031] In the present invention, the silicone oil has good film-forming properties and lubricity. In a relatively high content range (close to 65%), it can form a thicker and more durable lubricating film on the object surface, enhance the lubrication effect, and reduce friction; at a relatively low content (close to 40%), it can still provide basic lubrication and protection functions.

[0032] In terms of mass percentage, the raw materials for preparing the silicone oil-based emulsion provided by the present invention include 12 to 35% emulsifier, which can be 15 to 25%, specifically, it can be 17.1%, 17.8%, 18.5% or 20.7%. As a specific embodiment of the present invention, the emulsifier can include non-ionic surfactants and / or polyether-modified siloxanes, specifically, it can be a mixture of non-ionic surfactants and polyether-modified siloxanes, non-ionic surfactants or polyether-modified siloxanes; the non-ionic surfactants can include fatty alcohol polyoxyethylene ethers, and the fatty alcohol polyoxyethylene ethers can be one or more of isomeric tridecyl alcohol polyoxyethylene ether, secondary alcohol polyoxyethylene ether and BASF AEO-3. As a specific embodiment of the present invention, the isomeric tridecyl alcohol polyoxyethylene ether can be 1305 isomeric tridecyl alcohol polyoxyethylene ether, and the secondary alcohol polyoxyethylene ether can be 15-S-9 secondary alcohol polyoxyethylene ether. In the examples of the present invention, the fatty alcohol polyoxyethylene ether can specifically be a mixture of BASF AEO-3 and 15-S-9 secondary alcohol polyoxyethylene ether with a mass ratio of 1:1, a mixture of 1305 isomeric tridecyl alcohol polyoxyethylene ether and 15-S-9 secondary alcohol polyoxyethylene ether with a mass ratio of 1.1:1, a mixture of BASF AEO-3 and 1305 isomeric tridecyl alcohol polyoxyethylene ether with a mass ratio of 1:1 or 1305 isomeric tridecyl alcohol polyoxyethylene ether.

[0033] As a specific embodiment of the present invention, the polyether-modified silicone can be TEGO-410 purchased from Digao Additives Co., Ltd.

[0034] As a specific embodiment of the present invention, when the emulsifier is a nonionic surfactant and a polyether-modified silicone, the mass ratio of the nonionic surfactant to the polyether-modified silicone can be 0.9 to 2:1, specifically 0.9:1, 1.5:1 or 1.9:1.

[0035] In this invention, emulsifiers reduce the surface tension of the oil-water interface, allowing silicone oil and other oil-phase components to be evenly dispersed with the deionized water phase, forming a stable emulsion system. At higher levels (approximately 35%), the emulsifier exhibits enhanced emulsification, allowing it to handle larger volumes of oil and water, maintaining system stability under complex conditions. Lower levels (approximately 12%) are suitable for relatively simple systems with less stringent stability requirements, minimizing potential side effects of the emulsifier.

[0036] In the present invention, the nonionic surfactant has excellent emulsification and dispersing ability, which can effectively reduce the tension between the oil-water interface, thereby laying a solid foundation for the subsequent emulsification process. In the present invention, the polyether-modified siloxane combines a siloxane segment and a polyether segment, wherein the siloxane segment ensures a high affinity with the main raw material high molecular weight polydimethylsilicone, while the polyether segment significantly enhances its solubility in the aqueous system. The present invention limits the amount of emulsifier to the above range to enable polydimethylsilicone to reach the optimal emulsified state in the aqueous system; if the amount is too little, the oil-water interfacial tension cannot be fully reduced, and the silicone oil cannot be effectively dispersed and emulsified, which will lead to system instability, stratification, demulsification and other phenomena; if the amount is too much, although the emulsification ability is strong, it may introduce too many impurities, affecting the final performance of the additive, such as causing the water resistance, gloss and other properties of the paint film to deteriorate. The appropriate emulsifier dosage helps control the emulsion particle size, ensuring a uniform and ideal size for the emulsified silicone oil particles. This is crucial for even dispersion and film formation in waterborne wood coatings. A uniform particle size ensures a smooth paint film surface and enhances properties such as abrasion and scratch resistance. Furthermore, this dosage range ensures effective synergy between the emulsifier and other additive ingredients (acetic acid). Excessive emulsifier addition prevents interference with the functions of other ingredients, ensuring the overall stable and effective performance of the abrasion and scratch resistance additive.

[0037] By mass percentage, the raw materials for preparing the silicone oil-based emulsion provided by the present invention include 15-25% water, which can be 17-20%, and can specifically be 19% or 20%. As a specific embodiment of the present invention, the water can be deionized water. In the present invention, water acts as a solvent to dissolve some water-soluble components, participates in the physical and chemical processes of the system, and adjusts physical properties such as the viscosity and fluidity of the product. When the content is relatively high (close to 25%), the product has good fluidity and the system is relatively thinner; when the content is relatively low (close to 15%), the product is thicker and is conducive to forming a structure with certain support.

[0038] By mass percentage, the raw materials for preparing the silicone oil-based emulsion provided by the present invention include 0.05-0.5% acetic acid, which can specifically be 0.05%, 0.09%, 0.07%, 0.07%, 0.11% or 0.5%. The present invention adjusts the pH value of the silicone oil-based emulsion system by adding acetic acid to maintain a weakly acidic or near-neutral environment in the system, so that the silicone oil-based emulsion is in a suitable pH range, ensuring the stability and activity of each component. As a specific embodiment of the present invention, the pH value of the silicone oil-based emulsion can be 4.5-7.

[0039] The present invention also provides a method for preparing the silicone oil-based emulsion described in the above technical solution, including the following steps: mixing silicone oil, an emulsifier, water and acetic acid to obtain the silicone oil-based emulsion.

[0040] As a specific embodiment of the present invention, the mixing can include the following steps:

[0041] Performing a first kneading on the silicone oil and the emulsifier to obtain a first mixture;

[0042] Dropping water and acetic acid into the first mixture under the conditions of a second kneading to obtain the silicone oil-based emulsion.

[0043] The present invention performs a first kneading on the silicone oil and the emulsifier to obtain a first mixture. When the emulsifier is a variety of substances, the various substances can be first mixed to obtain a mixed emulsifier. As a specific embodiment of the present invention, the rotation speed of the first kneading can be 60-100 r / min, and can specifically be 70 r / min, 75 r / min or 80 r / min; the time of the first kneading can be 2.5-3.5 h, and can specifically be 2.5 h, 3 h or 3.5 h.

[0044] After obtaining the first mixture, water and acetic acid are added dropwise to the first mixture under the conditions of the second kneading in the present invention to obtain the silicone oil-based emulsion. In the present invention, the rotation speed of the second kneading can be 60-100 r / min, specifically 70 r / min, 75 r / min or 80 r / min. As a specific embodiment of the present invention, the time for adding water and acetic acid dropwise can be 2-6 h, specifically 2.3 h, 2.5 h, 2.6 h, 3 h, 4 h, 5 h or 6 h. The present invention has no special requirements for the dropping rate as long as it can form drops.

[0045] As a specific embodiment of the present invention, after adding water and acetic acid dropwise, it may further include: continuing to knead the system after adding water and acetic acid dropwise for 1-2 h, specifically 1 h, 1.5 h or 2 h.

[0046] The step-by-step mixing in the present invention can promote sufficient emulsification, and at the same time has the following special purposes and functions: 1. Avoid violent reactions. Mixing polydimethylsiloxane and emulsifier first can make the two fully act to form a relatively stable pre-emulsification system. Then, adding water and acetic acid dropwise can avoid violent phase separation caused by large differences in compatibility with the silicone oil system when adding water, and at the same time prevent the rapid addition of acetic acid from causing a sharp change in the pH value of the system and affecting the emulsion stability. 2. Ensure uniform dispersion of the system. 3. Control the stable state of the system.

[0047] The present invention also provides the application of the silicone oil-based emulsion described in the above technical solution as a wear-resistant and scratch-resistant additive in waterborne wood coatings. Adding the silicone oil-based emulsion provided by the present invention as a wear-resistant and scratch-resistant agent to the waterborne wood coating slurry can be uniformly dispersed and improve the wear-resistant and scratch-resistant performance.

[0048] The present invention also provides a modified waterborne wood coating, including a wear-resistant and scratch-resistant additive; the wear-resistant and scratch-resistant additive is the silicone oil-based emulsion described in the above technical solution.

[0049] As a specific embodiment of the present invention, the modified waterborne wood coating may further include a base liquid, and the base liquid may include a waterborne resin, water and additives; the waterborne resin may be a waterborne acrylic resin, a waterborne polyurethane resin, a waterborne epoxy resin or a waterborne alkyd resin; the water may be deionized water; the additives may include one or more of a co-solvent, a rheology additive, a wetting and leveling agent, a defoaming agent, a surfactant and a matting powder; the solid content of the base liquid may be 33-37%, specifically 35%; the gloss of the base liquid may be 58-62°, specifically 60°.

[0050] In the embodiments of the present invention, the cosolvent is dipropylene glycol methyl ether and dipropylene glycol butyl ether with a mass ratio of 1:1, the rheology additive is BYK-H750VF of BYK, the wetting and leveling agent is TWIN 4100 of Degussa, the defoaming agent is 902W of Degussa, the surfactant is GLDE 450 of Degussa, and the matting powder is SYLOIDAQ800 of Grace.

[0051] As a specific embodiment of the present invention, the mass ratio of the silicone oil-based emulsion to the base liquid can be 4-6:100.

[0052] To further illustrate the present invention, the technical solutions provided by the present invention will be described in detail below in conjunction with embodiments, but they cannot be understood as limiting the protection scope of the present invention.

[0053] In the examples, isomeric tridecyl alcohol polyoxyethylene ether 1305 was purchased from Sasol Chemical Co., Ltd., and secondary alcohol polyoxyethylene ether 15-S-9 was purchased from Dow Chemical Company.

[0054] Example 1

[0055] 45 g of BASF AEO-3 and 45 g of secondary alcohol polyoxyethylene ether 15-S-9 were added to a kneader. After kneading for 30 min at a rotation speed of 65 r / min, 60 g of TEGO-410 (polyether-modified silicone emulsifier) of Degussa was added and kneaded for 30 min to obtain an emulsifier;

[0056] 365 g of polydimethylsiloxane with a viscosity of 180,000 cps and 185 g of hydroxyl silicone oil with a viscosity of 500,000 cps were added to the emulsifier and kneaded for 3 h at a rotation speed of 70 r / min. Then, while kneading (70 r / min), 175 g of deionized water and 0.8 g of acetic acid were added dropwise. The addition was completed in 2.3 h, and kneading continued for 1.5 h to obtain a wear-resistant and scratch-resistant additive silicone oil-based emulsion.

[0057] Example 2

[0058] 52 g of isomeric tridecyl alcohol polyoxyethylene ether 1305 of Sasol and 48 g of secondary alcohol polyoxyethylene ether 15-S-9 of Dow were added to a kneader. The power of the kneader was turned on, and after kneading for 25 min at a rotation speed of 65 r / min, 65 g of TEGO-410 (polyether-modified silicone emulsifier) of Degussa was added and kneaded for 25 min to obtain an emulsifier;

[0059] Add 400 g of polydimethylsiloxane with a viscosity of 200,000 cps and 150 g of hydroxyl silicone oil with a viscosity of 650,000 cps to the emulsifier, knead for 3 h under the condition of a rotation speed of 75 r / min, then while kneading (75 r / min), dropwise add 175 g of deionized water and 0.6 g of acetic acid. The dropping is completed in 2.3 h, and continue to knead for 1.5 h to obtain a silicone oil-based emulsion of wear-resistant and scratch-resistant auxiliary agent.

[0060] Example 3

[0061] Add 50 g of BASF AEO-3, 50 g of Sasol 1305 isomeric tridecyl alcohol polyoxyethylene ether, and 72 g of Degussa TEGO-410 (polyether-modified silicone emulsifier) into a kneader, and knead for 3 min under the condition of a rotation speed of 65 r / min to obtain an emulsifier;

[0062] Add 435 g of polydimethylsiloxane with a viscosity of 300,000 cps and 165 g of hydroxyl silicone oil with a viscosity of 600,000 cps to the emulsifier, knead for 3 h under the condition of a rotation speed of 75 r / min, then while kneading (75 r / min), dropwise add 193 g of deionized water and 0.7 g of acetic acid. The dropping is completed in 2.6 h, and continue to knead for 1.5 h to obtain a silicone oil-based emulsion of wear-resistant and scratch-resistant auxiliary agent.

[0063] Example 4

[0064] Add 85 g of Sasol 1305 isomeric tridecyl alcohol polyoxyethylene ether and 105 g of Degussa TEGO-410 (polyether-modified silicone emulsifier) into a kneader, and knead for 28 min under the condition of a rotation speed of 60 r / min to obtain an emulsifier;

[0065] Add 271.5 g of polydimethylsiloxane with a viscosity of 450,000 cps and 271.5 g of hydroxyl silicone oil with a viscosity of 800,000 cps to the emulsifier, knead for 3 h under the condition of a rotation speed of 80 r / min, then while kneading (80 r / min), dropwise add 183 g of deionized water and 1 g of acetic acid. The dropping is completed in 2.5 h, and continue to knead for 1.5 h to obtain a silicone oil-based emulsion of wear-resistant and scratch-resistant auxiliary agent.

[0066] Comparative Example 1

[0067] Use silicone morning CG-51 feel agent as the comparative example,

[0068] Comparative Example 2

[0069] Use DC-5 scratch-resistant agent as the comparative example.

[0070] Comparative Example 3 (low-viscosity silicone oil)

[0071] Prepare the wear-resistant and scratch-resistant auxiliary silicone oil-based emulsion according to the method of Example 4, except that the viscosity of polydimethylsiloxane is 50000 cps and the viscosity of hydroxy silicone oil is 80000 cps.

[0072] Comparative Example 4 (high-viscosity silicone oil)

[0073] Prepare the wear-resistant and scratch-resistant auxiliary silicone oil-based emulsion according to the method of Example 4, except that the viscosity of polydimethylsiloxane is 100000 cps and the viscosity of hydroxy silicone oil is 900000 cps.

[0074] Example 5

[0075] Prepare the base liquid:

[0076] Add 800 g of waterborne acrylic resin, 88 g of deionized water, 30 g each of cosolvents dipropylene glycol methyl ether and dipropylene glycol butyl ether, 4 g of rheology additive BYK-H750VF, 4 g of wetting and leveling agent Disperbyk TWIN 4100, 2 g of defoamer Disperbyk 902W, 3 g of surfactant Disperbyk GLDE 450, and 20 g of Grace SYLOID A matting powder into a 2-L beaker, and stir and disperse at a speed of 800 r / min for 30 min to obtain a base liquid with a viscosity of 580 CPS, a solid content of 35%, and a glossiness of 60°.

[0077] Divide the above-prepared base liquid into 8 equal parts, and then add the wear-resistant and scratch-resistant auxiliaries of Examples 1-4 and Comparative Examples 1-4 to the base liquid respectively. The addition amount of the auxiliary is 5% of the total mass of the base liquid, and then stir and disperse at a speed of 1200 r / min for 15 min to obtain a modified waterborne wood paint.

[0078] Dilute the emulsions prepared in Examples 1-4 and Comparative Examples 1-4 according to the mass ratio of emulsion to water of 1:20, disperse them with a disperser at a speed of 800 r / min for 30 min, and then let them stand for 24 h to detect their storage stability. The results are listed in Table 1.

[0079] Spray the obtained modified waterborne wood paint onto the wood board by a conventional process, and test its wear resistance using an ASTM D4060 abrasion tester after drying, and at the same time test its scratch resistance using the pencil hardness test method. The results are listed in Table 1.

[0080] Table 1 Performance results of the auxiliaries of Examples 1-4 and Comparative Examples 1-4

[0081]

[0082] Remarks: Compatibility: A means slight stratification, B means basically compatible, and C means completely compatible.

[0083] Handfeel grade: 1 (poor), 2 (average), 3 (good), 4 (very good).

[0084] Abrasion and scratch resistance performance: The higher the grade, the better.

[0085] Storage stability: Represented by excellent and good.

[0086] As can be seen from the test data in Table 1, the comprehensive performance of the abrasion and scratch resistance aid in Example 2 is better. For example, its compatibility, handfeel, abrasion resistance, scratch resistance and product storage stability are all relatively excellent. Its abrasion and scratch resistance performance is on par with foreign competing products, but the compatibility of Example 2 is better and the price is lower than that of Comparative Example 2.

[0087] Through the test results of Example 4 and Comparative Examples 3 and 4 in Table 1, it can be fully demonstrated that selecting the silicone oil with the defined viscosity in the present invention can significantly improve the compatibility between the silicone oil-based emulsion and the waterborne wood paint.

[0088] Although the above embodiments have made a detailed description of the present invention, they are only a part of the embodiments of the present invention, rather than all embodiments. People can also obtain other embodiments based on these embodiments without creative efforts, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A silicone oil-based emulsion, characterized in that, The preparation raw materials include the following mass percentages: The silicone oil includes polydimethylsiloxane and / or hydroxy silicone oil; the viscosity of the silicone oil is 50,000 - 850,000 cps.

2. The silicone oil-based emulsion according to claim 1, wherein The viscosity of the polydimethylsiloxane is 50,000 - 500,000 cps; The viscosity of the hydroxy silicone oil is 100,000 - 850,000 cps.

3. The silicone oil-based emulsion according to claim 1 or 2, characterized in that, When the silicone oil is polydimethylsiloxane and hydroxy silicone oil, the mass ratio of the polydimethylsiloxane to the hydroxy silicone oil is 10 - 50:10 - 50.

4. The silicone oil-based emulsion according to claim 1, wherein The emulsifier includes non-ionic surfactant and / or polyether modified silicone.

5. The silicone oil-based emulsion according to claim 4, wherein When the emulsifier is non-ionic surfactant and polyether modified silicone, the mass ratio of the non-ionic surfactant to the polyether modified silicone is 0.9 - 2:

1.

6. The silicone oil-based emulsion according to claim 1, 4 or 5, characterized in that, The non-ionic surfactant includes fatty alcohol polyoxyethylene ether.

7. The preparation method of the silicone oil-based emulsion according to any one of claims 1 to 6, characterized in that, It includes the following steps: Mix the silicone oil, emulsifier, water and acetic acid to obtain the silicone oil-based emulsion.

8. The preparation method according to claim 7, wherein The mixing includes the following steps: Perform the first kneading on the silicone oil and emulsifier to obtain the first mixture; Under the condition of the second kneading, add water and acetic acid dropwise to the first mixture to obtain the silicone oil-based emulsion.

9. Application of the silicone oil-based emulsion according to any one of claims 1 - 6 as an abrasion-resistant and scratch-resistant aid in waterborne wood coatings.

10. A modified waterborne wood paint, characterized in that, It includes an abrasion-resistant and scratch-resistant aid; The abrasion-resistant and scratch-resistant aid is the silicone oil-based emulsion according to any one of claims 1 - 6.

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