Eucommia ulmoides gum emulsion marine antifouling paint as well as preparation method and application thereof

Abstract

The invention relates to a gutta-percha emulsion marine antifouling coating for a gutta-percha-based material and a preparation method of the gutta-percha emulsion marine antifouling coating. The gutta-percha marine antifouling paint comprises gutta-percha, filler slurry and auxiliaries, the gutta-percha emulsion comprises the following components in parts by weight: 45-60 parts of gutta-percha emulsion, 37-54 parts of filler slurry and 1-3.5 parts of auxiliaries, wherein the total weight of the components is 100 parts. Compared with a coating in the prior art, the gutta-percha emulsion marine antifouling coating disclosed by the invention can be used on a gutta-percha-based material, and has better film forming effect and adhesive force on the gutta-percha-based material. Besides, after the gutta-percha-based material is coated with the gutta-percha-emulsion marine antifouling paint, a film forming substance is gutta-percha, the gutta-percha can form a film on the surface of the gutta-percha-based material and be attached to the gutta-percha-based material, and due to the fact that the coating has elasticity, the gutta-percha-emulsion marine antifouling paint can be matched with elastic deformation of the gutta-percha-based material.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and more specifically, to a marine antifouling coating made from Eucommia ulmoides latex, its preparation method, and its application. Background Technology

[0002] Marine fouling is the harmful adhesion of fouling organisms to ship hulls or underwater equipment. There are many types of marine fouling organisms, including barnacles, mussels, algae, and marine bacteria. Marine pollution is a rapid and complex process that poses a significant threat to human activities. Marine fouling organisms attached to ship hulls significantly increase drag, reduce speed, increase fuel consumption and greenhouse gas emissions, ultimately leading to energy waste and environmental pollution. Furthermore, long-term fouling accelerates corrosion of hulls and underwater equipment, shortening their lifespan. For the ecological environment, long-distance maritime transport also contributes to biological invasions. It is estimated that antifouling coatings could save the shipping industry approximately $60 billion in fuel annually and reduce emissions of approximately 384 million tons of carbon dioxide and 3.6 million tons of sulfur dioxide annually.

[0003] Equipment used underwater faces the challenge of marine fouling organisms. Since the fourth century AD, there are documented instances of biofouling causing ship slowdowns. Humans have been searching for antifouling methods to combat physical corrosion, initially using mixtures of natural minerals and resins to coat the hull or manually removing fouling. Early antifouling coatings primarily used toxic antifouling agents in their composition to inhibit fouling organisms. The use of copper, tin, mercury, lead, and other substances to kill fouling organisms on ships was known over a century ago. With technological advancements, more and more antifouling technologies have emerged, such as mechanical removal, electrochemical methods, and antifouling coatings. To date, antifouling coatings remain the most economical and effective method, with modifications to their composition and mechanisms to resist increasingly sophisticated fouling.

[0004] However, due to the significant difference in polarity between traditional antifouling coatings and Eucommia ulmoides-based materials, traditional antifouling coatings cannot form a film and adhere to the surface of Eucommia ulmoides-based materials. Even when applied, the coating cracks and peels off. Furthermore, Eucommia ulmoides-based materials are elastic, while most traditional coatings are rigid and cannot accommodate the elastic deformation of Eucommia ulmoides-based materials. In addition, equipment using Eucommia ulmoides-based materials also faces antifouling problems when used underwater.

[0005] Therefore, in order to ensure the application of Eucommia ulmoides rubber-based materials in underwater equipment, it is necessary to develop a marine antifouling coating for Eucommia ulmoides rubber latex that can form a film and adhere to the surface of Eucommia ulmoides rubber-based materials, accommodate the elastic deformation of Eucommia ulmoides rubber-based materials, and also have antifouling properties. This has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides a marine antifouling coating made from Eucommia ulmoides latex. By preparing an antifouling agent, filler, and filler auxiliaries into a filler slurry, the stability of the system can be protected when the filler is blended with Eucommia ulmoides latex, preventing the Eucommia ulmoides latex from breaking down. The resulting coating can both form a film and adhere to the surface of the Eucommia ulmoides base material, and can also accommodate the elastic deformation of the Eucommia ulmoides base material.

[0007] One of the objectives of this invention is to provide a marine antifouling coating made from Eucommia ulmoides latex, which comprises Eucommia ulmoides latex, filler slurry, and additives.

[0008] Each component is calculated as 100 parts by total weight:

[0009] 45-60 parts by weight of Eucommia ulmoides latex;

[0010] 37-54 parts by weight of filler slurry;

[0011] Additives: 1-3.5 parts by weight;

[0012] The filler slurry is obtained by mixing and grinding antifouling agent, filler and filler additive.

[0013] The filler slurry can be obtained by the following steps: Weigh the antifouling agent, filler, and filler additive. After weighing, mix the three together, allowing the mixture of antifouling agent and filler to be initially dispersed in the liquid phase of the filler additive. Stir manually for 10 minutes to facilitate subsequent grinding. After stirring evenly, pour the mixture of antifouling agent, filler, and filler additive into a conical mill for grinding, and adjust the drip rate of the slurry ground by the conical mill to one drop per second to obtain the filler slurry.

[0014] It should be noted that filler additives are added here while mixing fillers and antifouling agents. This is to make the powdered fillers more fully and evenly dispersed in the liquid, further reduce agglomeration during subsequent grinding, and further improve the stability of the system during mixing with latex. At the same time, mixing the three together can also save one grinding time.

[0015] In a preferred embodiment of the present invention, each component is calculated in parts by weight of 100:

[0016] 48-59 parts by weight of Eucommia ulmoides latex;

[0017] 39-50 parts by weight of filler slurry;

[0018] 1-3 parts by weight of auxiliary agent;

[0019] In a preferred embodiment of the present invention

[0020] The antifouling agent is at least one of cuprous oxide and copper pyrithione; and / or

[0021] The filler is talc powder and / or fumed silica; and / or

[0022] The filler additives mentioned are dispersants, stabilizers, and diffusing agents;

[0023] Preferred,

[0024] The dispersant is at least one of sodium methylene dinaphthalene sulfonate solution and sodium alkyl naphthalene sulfonate solution; and / or

[0025] The stabilizer is at least one of potassium hydroxide solution and sodium hydroxide solution; and / or

[0026] The dispersant is at least one of casein solution and polyvinyl alcohol solution;

[0027] More preferably,

[0028] The casein solution comprises casein, borax, ammonia, and water.

[0029] In a preferred embodiment of the present invention, the concentration of the dispersant is 9-10 wt%; the concentration of the stabilizer is 9-10 wt%; and the concentration of the dispersant is 10-11 wt%.

[0030] For example, the concentration of the sodium methylene dinaphthalene sulfonate solution is 9-10 wt%, i.e., the solute is sodium methylene dinaphthalene sulfonate solution and the solvent is water. For example, the concentration of the sodium alkyl naphthalene sulfonate solution is 9-10 wt%, i.e., the solute is sodium alkyl naphthalene sulfonate and the solvent is water. For example, the concentration of the potassium hydroxide solution is 9-10 wt%, i.e., the solute is potassium hydroxide solution and the solvent is water. For example, the concentration of the sodium hydroxide solution is 9-10 wt%, i.e., the solute is sodium hydroxide solution and the solvent is water. For example, the concentration of the casein solution is 10-11 wt%, i.e., the solute is casein and the solvents are borax, ammonia, and deionized water. For example, the concentration of the polyvinyl alcohol solution is 10-11 wt%, i.e., the solute is polyvinyl alcohol and the solvent is water.

[0031] In a preferred embodiment of the present invention, the weight ratio of the antifouling agent, the filler, and the filler additive is 1.5–2:0.4–1:1, preferably 1.8–2:0.5–0.7:1; the weight ratio of the dispersant, the diffuser, and the stabilizer is 7–10:2–4:2, preferably 8–9:3–4:2; and the mass ratio of the talc powder to the fumed silica is 5–15:1, preferably 6–13:1. Those skilled in the art can select appropriate weight ratios of the antifouling agent, the filler, and the filler additive, as well as appropriate weight ratios of the dispersant, the diffuser, and the stabilizer, and appropriate mass ratios of the talc powder and the fumed silica, according to actual conditions.

[0032] In a preferred embodiment of the present invention, the average particle size of the filler slurry is 48-50 μm.

[0033] In a preferred embodiment of the present invention, the additive is a leveling agent and / or an adhesion promoter; preferably, the weight ratio of the leveling agent to the adhesion promoter is 0.01 to 0.1:1.

[0034] The second objective of this invention is to provide a method for preparing the Eucommia ulmoides latex marine antifouling coating, which is one of the objectives of this invention.

[0035] S1: The filler slurry is mixed with the Eucommia ulmoides latex and allowed to stand to obtain a base coating; preferably, the standing time is 5 to 10 minutes.

[0036] S2: The base coating is mixed with the leveling agent and allowed to stand; an adhesion promoter is added to obtain the Eucommia ulmoides latex marine antifouling coating; preferably, the standing time is 5 to 10 minutes.

[0037] The preparation method may specifically include:

[0038] First, prepare the base coating. Weigh out the Eucommia ulmoides latex according to the formula. Pour the filler slurry into the Eucommia ulmoides latex, noting that the filler slurry needs to be poured in while stirring. After the filler slurry is completely poured into the Eucommia ulmoides latex, let it stand for 5-10 minutes to obtain the base coating.

[0039] Secondly, prepare the Eucommia ulmoides latex marine antifouling coating. Weigh the leveling agent and adhesion promoter according to the formula, add the leveling agent dropwise to the base coating obtained above, stir evenly, and let stand for 5-10 minutes; then add the adhesion promoter dropwise to obtain the Eucommia ulmoides latex marine antifouling coating.

[0040] The third objective of this invention is to provide an application of the Eucommia ulmoides latex marine antifouling coating described in the first objective of this invention or the Eucommia ulmoides latex marine antifouling coating prepared by the method described in the second objective of this invention on the surface of Eucommia ulmoides-based materials.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] 1. The Eucommia ulmoides latex marine antifouling coating of the present invention can be used on Eucommia ulmoides rubber-based materials, and has good film-forming effect and adhesion on Eucommia ulmoides rubber-based materials.

[0043] 2. The Eucommia ulmoides latex marine antifouling coating of the present invention has Eucommia ulmoides gum as the film-forming substance after being coated on Eucommia ulmoides gum-based material. It can not only form a film and adhere to the surface of Eucommia ulmoides gum-based material, but also cooperate with the elastic deformation of Eucommia ulmoides gum-based material due to the elasticity of the coating itself.

[0044] 3. The present invention prepares antifouling agent, filler and filler additive into filler slurry, which can protect the stability of the system when the filler is blended with Eucommia ulmoides latex, so that Eucommia ulmoides latex will not break down.

[0045] 4. The Eucommia ulmoides latex marine antifouling coating of the present invention has a broad-spectrum antifouling effect on attached marine organisms.

[0046] 5. The Eucommia ulmoides latex marine antifouling coating of the present invention has better leveling properties. Attached Figure Description

[0047] Figure 1 This is a schematic diagram for hardness test rating.

[0048] Figure 2 This is a schematic diagram for the adhesion test rating. Detailed Implementation

[0049] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the content of the present invention are still within the scope of protection of the present invention.

[0050] The raw materials used in the examples and comparative examples were all commercially available.

[0051] In the following examples, the concentration of the casein solution was 10 wt%. The casein solution was obtained by mixing casein, borax, 28 wt% ammonia, and deionized water; wherein the mass ratio of casein, borax, 28 wt% ammonia, and deionized water was 10:1.5:3.2:85.3.

[0052] Example 1

[0053] S1: Preparation of filler slurry

[0054] Weigh out 27.90 g of cuprous oxide, 7.67 g of filler, and 14.51 g of filler additives; wherein the filler includes 6.97 g of talc and 0.70 g of fumed silica; and the filler additives include 3.35 g of 10 wt% NF solution, 8.93 g of 10 wt% casein solution, and 2.23 g of 10 wt% KOH solution. Add the aforementioned components to a conical mill, and adjust the dripping rate of the slurry produced by the conical mill to approximately one drop per second to obtain a filler slurry. The average particle size of the obtained filler slurry is 45 μm.

[0055] S2: Preparation of base coating

[0056] Pour the filler slurry obtained in step S1 into 48.83g of Eucommia ulmoides latex. The filler slurry needs to be poured into the Eucommia ulmoides latex while stirring. After the filler slurry is completely poured into the Eucommia ulmoides latex, let it stand for 5 minutes to obtain the base coating.

[0057] S3: Preparation of Eucommia ulmoides latex marine antifouling coating

[0058] Add 0.1g of leveling agent BYK333 to the base coating in step S2, stir, and let stand for 5 minutes. Then add 0.99g of adhesion promoter BYK4500 to obtain Eucommia ulmoides latex marine antifouling coating.

[0059] Example 2

[0060] S1: Preparation of filler slurry

[0061] Weigh out 27.63g of cuprous oxide, 7.18g of filler, and 14.37g of filler additives; wherein the filler includes 6.63g of talc and 0.55g of fumed silica; and the filler additives include 3.32g of 10wt% NF solution, 8.84g of 10wt% casein solution, and 2.21g of 10wt% KOH solution. Add the aforementioned components to a conical mill, and adjust the dripping rate of the slurry produced by the conical mill to approximately one drop per second to obtain a filler slurry. The average particle size of the obtained filler slurry is 45μm.

[0062] S2: Preparation of base coating

[0063] Pour the filler slurry obtained in step S1 into 49.73g of Eucommia ulmoides latex. The filler slurry needs to be poured into the Eucommia ulmoides latex while stirring. After the filler slurry is completely poured into the Eucommia ulmoides latex, let it stand for 5 minutes to obtain the base coating.

[0064] S3: Preparation of Eucommia ulmoides latex marine antifouling coating

[0065] Add 0.1g of leveling agent BYK333 to the base coating in step S2, stir, and let stand for 5 minutes. Then add 0.99g of adhesion promoter BYK4500 to obtain Eucommia ulmoides latex marine antifouling coating.

[0066] Example 3

[0067] S1: Preparation of filler slurry

[0068] Weigh out 21.32 g of cuprous oxide, 6.92 g of filler, and 11.09 g of filler additives; wherein the filler includes 6.39 g of talc and 0.53 g of fumed silica; and the filler additives include 2.56 g of 10 wt% NF solution, 6.82 g of 10 wt% casein solution, and 1.71 g of 10 wt% KOH solution. Add the aforementioned components to a conical mill, and adjust the dripping rate of the slurry produced by the conical mill to approximately one drop per second to obtain a filler slurry. The average particle size of the obtained filler slurry is 45 μm.

[0069] S2: Preparation of base coating

[0070] Pour the filler slurry obtained in step S1 into 58.61g of Eucommia ulmoides latex. The filler slurry needs to be poured into the Eucommia ulmoides latex while stirring. After the filler slurry is completely poured into the Eucommia ulmoides latex, let it stand for 5 minutes to obtain the base coating.

[0071] S3: Preparation of Eucommia ulmoides latex marine antifouling coating

[0072] Add 0.1g of leveling agent BYK333 to the base coating in step S2, stir, and let stand for 5 minutes. Then add 1.96g of adhesion promoter BYK4500 to obtain Eucommia ulmoides latex marine antifouling coating.

[0073] Example 4

[0074] S1: Preparation of filler slurry

[0075] Weigh out 24.62 g of cuprous oxide, 5.41 g of filler, and 12.80 g of filler additives; wherein the filler includes 4.92 g of talc powder and 0.49 g of fumed silica; and the filler additives include 2.95 g of 10 wt% NF solution, 7.88 g of 10 wt% casein solution, and 1.97 g of 10 wt% KOH solution. Add the aforementioned components to a conical mill, and adjust the dripping rate of the slurry produced by the conical mill to approximately one drop per second to obtain a filler slurry. The average particle size of the obtained filler slurry is 45 μm.

[0076] S2: Preparation of base coating

[0077] Pour the filler slurry obtained in step S1 into 54.16g of Eucommia ulmoides latex. The filler slurry needs to be poured into the Eucommia ulmoides latex while stirring. After the filler slurry is completely poured into the Eucommia ulmoides latex, let it stand for 5 minutes to obtain the base coating.

[0078] S3: Preparation of Eucommia ulmoides latex marine antifouling coating

[0079] Add 0.1g of leveling agent BYK333 to the base coating in step S2, stir, and let stand for 5 minutes. Then add 2.91g of adhesion promoter BYK4500 to obtain Eucommia ulmoides latex marine antifouling coating.

[0080] Comparative Example 1

[0081] S1: Preparation of filler slurry

[0082] Weigh out 27.90 g of cuprous oxide, 7.67 g of filler, and 12.28 g of filler additives; wherein the filler includes 6.97 g of talc and 0.70 g of fumed silica; and the filler additives include 3.35 g of 10 wt% NF solution and 8.93 g of 10 wt% casein solution. Add the aforementioned components to a conical mill, and adjust the dripping rate of the slurry produced by the conical mill to approximately one drop per second to obtain a filler slurry. The average particle size of the obtained filler slurry is 45 μm.

[0083] S2: Preparation of base coating

[0084] The filler slurry obtained in step S1 was poured into 48.83g of Eucommia ulmoides latex. The filler slurry needed to be poured into the Eucommia ulmoides latex while stirring. However, after the filler slurry was completely poured into the Eucommia ulmoides latex, the latex broke down and formed gel blocks, making it impossible to obtain a coating.

[0085] Comparative Example 2

[0086] S1: Preparation of filler slurry

[0087] Weigh out 27.90 g of cuprous oxide, 7.67 g of filler, and 5.58 g of filler additives; wherein the filler includes 6.97 g of talc powder and 0.70 g of fumed silica; and the filler additives include 3.35 g of 10 wt% NF solution and 2.23 g of 10 wt% potassium hydroxide solution. Add the aforementioned components to a conical mill, and adjust the dripping rate of the slurry produced by the conical mill to approximately one drop per second to obtain a filler slurry. The average particle size of the obtained filler slurry is 45 μm.

[0088] S2: Preparation of base coating

[0089] The filler slurry obtained in step S1 was poured into 48.83g of Eucommia ulmoides latex. The filler slurry needed to be poured into the Eucommia ulmoides latex while stirring. However, after the filler slurry was completely poured into the Eucommia ulmoides latex, the latex broke down and formed gel blocks, making it impossible to obtain a coating.

[0090] Comparative Example 3

[0091] S1: Preparation of filler slurry

[0092] Weigh out 27.90 g of cuprous oxide, 7.67 g of filler, and 11.16 g of filler additives; wherein the filler includes 6.97 g of talc powder and 0.70 g of fumed silica; and the filler additives include 8.93 g of 10 wt% casein solution and 2.23 g of 10 wt% potassium hydroxide solution. Add the aforementioned components to a conical mill, and adjust the dripping rate of the slurry produced by the conical mill to approximately one drop per second to obtain a filler slurry. The average particle size of the obtained filler slurry is 45 μm.

[0093] S2: Preparation of base coating

[0094] The filler slurry obtained in step S1 was poured into 48.83g of Eucommia ulmoides latex. The filler slurry needed to be poured into the Eucommia ulmoides latex while stirring. However, after the filler slurry was completely poured into the Eucommia ulmoides latex, the latex broke down and formed gel blocks, making it impossible to obtain a coating.

[0095] In Comparative Examples 1 through 3, the Eucommia ulmoides latex underwent demulsification during the coating preparation process, ultimately preventing the formation of a coating. This is because a solid-liquid interface exists between the filler and the latex, and the filler particles are larger and harder than the Eucommia ulmoides latex particles, resulting in poor compatibility between the two. During the stirring process, friction and compression between the filler and latex particles caused the Eucommia ulmoides latex to demulsify, making coating preparation impossible.

[0096] The Eucommia ulmoides latex marine antifouling coatings prepared in Examples 1-4 were sprayed onto the surface of Eucommia ulmoides-based materials and cured at room temperature to obtain coatings. Hardness, adhesion, and contact angle were then tested, and the results are shown in Table 1. The hardness of the coating was determined using a pencil hardness test according to the national standard GB / T 6739-2022 "Determination of Hardness of Paint Film by Pencil Method". A pencil was tilted at a 45° angle to the paint film, and a 3cm long scratch was drawn on the coating under a 1kg load. The rating is as follows: Figure 1 As shown; according to GB / T9286-1998 "Test Method for Adhesion of Coating Film", the adhesion of the coating to the Eucommia ulmoides-based material was determined by the cross-cut adhesion test, and its rating is as follows. Figure 2As shown, the contact angle of the coating was measured using a contact angle measuring instrument (XG-CAM). The droplet volume was approximately 1 μL (gravity has no effect on the shape of droplets smaller than 6 μL). A 1.0 mL micro-syringe was used to store the required droplet of deionized water for the contact angle test. The computer control panel was clicked to form a droplet at the syringe tip. The measuring instrument knob was rotated to raise the worktable, allowing the coating surface to receive the droplet. The worktable was then lowered, and the droplet image was quickly saved to obtain the contact angle of the coating. The impact resistance of the coating was determined using an impact tester according to the "Method for Determination of Impact Resistance" (GB / T1732-1993). In this embodiment, the mass of the impact hammer was 1 kg. The straight-line distance between the impact point of the coating and the edge of the coating should be no less than 15 mm, and the distance between each strong impact point should be no less than 15 mm. The deformation of the coating caused by the falling hammer, but not to the point of failure, was recorded. The impact resistance of the coating is expressed as the product of the hammer mass (kg) and the falling height (cm), in kg·cm. Each test plate underwent three parallel impact tests.

[0097] Table 1 Performance test results of Examples 1 to 4

[0098]

[0099] Analysis of the data in Table 1 shows that the adhesion strength between the Eucommia ulmoides latex marine antifouling coatings of Examples 1-4 and the Eucommia ulmoides-based materials is Grade 2, Grade 1, Grade 0, and Grade 0, respectively. This indicates that the Eucommia ulmoides latex marine antifouling coatings of the present invention can be used on Eucommia ulmoides-based materials and have good film-forming effect and adhesion. In particular, Examples 3 and 4 show an adhesion strength of Grade 0 between the coatings and the Eucommia ulmoides-based materials, indicating even better adhesion.

[0100] Analysis of the data in Table 1 shows that the pencil hardness of the coatings formed after the Eucommia ulmoides latex marine antifouling coatings of Examples 1-4 were applied to Eucommia ulmoides-based materials was 5H, 5H, 4H and 4H respectively. This indicates that the hardness of the Eucommia ulmoides latex marine antifouling coating of the present invention is comparable to that of traditional antifouling coatings, and the coating can provide a certain degree of protection.

[0101] Analysis of the data in Table 1 shows that the contact angles of the Eucommia ulmoides latex marine antifouling coatings of Examples 1-4, after being applied to Eucommia ulmoides-based materials, were 78°, 70°, 70°, and 68°, respectively, all less than 90°. This indicates that the Eucommia ulmoides latex marine antifouling coating of the present invention has good wetting properties between the coating and the substrate, which facilitates the spreading of the coating between the substrates and further improves the adhesion of the coating.

[0102] Analysis of the data in Table 1 shows that the impact resistance of the eucommia latex marine antifouling coatings of Examples 1-4, after being applied to the eucommia-based material, are 30 kg·cm, 40 kg·cm, 50 kg·cm, and 50 kg·cm, respectively. This indicates that the eucommia latex marine antifouling coating of the present invention has a certain degree of elasticity, and therefore can accommodate the elastic deformation of the eucommia latex-based material. In particular, Examples 3 and 4 show an impact resistance of 50 kg·cm.

[0103] Those skilled in the art will know that cuprous oxide is a highly effective antifouling agent, and a significant antifouling effect is achieved when the cuprous oxide content in the film-forming material is not less than 26.7%. The coatings obtained in Examples 1-4 contain antifouling agent contents far exceeding 26.7%, thus exhibiting excellent antifouling effects.

[0104] Comparing Examples 1 to 4, it can be observed that as the proportion of pigments and fillers decreases and the proportion of Eucommia ulmoides latex increases, the properties of the coating improve in all aspects. This is because as the proportion of pigments and fillers decreases, the dispersibility of fillers in the coating is improved, and the agglomeration of fillers is greatly reduced. Consequently, the stress concentration points of the coating formed by the coating are reduced, thereby improving the mechanical properties of the coating.

Claims

1. A marine antifouling coating made from Eucommia ulmoides latex, characterized in that: The Eucommia ulmoides latex marine antifouling coating comprises Eucommia ulmoides latex, filler slurry, and additives; Each component is calculated as 100 parts by total weight: 45-60 parts by weight of Eucommia ulmoides latex; 37-54 parts by weight of filler slurry; Additives: 1-3.5 parts by weight; The filler slurry is obtained by mixing and grinding antifouling agent, filler and filler additive.

2. The Eucommia ulmoides latex marine antifouling coating according to claim 1, characterized in that: Each component is calculated as 100 parts by total weight: 48-59 parts by weight of Eucommia ulmoides latex; 39-50 parts by weight of filler slurry; Additives: 1-3 parts by weight.

3. The Eucommia ulmoides latex marine antifouling coating according to claim 1, characterized in that: The antifouling agent is at least one of cuprous oxide and copper pyrithione; and / or The filler is talc powder and / or fumed silica; and / or The filler additives mentioned are dispersants, stabilizers, and diffusing agents; Preferred, The dispersant is at least one of sodium methylene dinaphthalene sulfonate solution and sodium alkyl naphthalene sulfonate solution; and / or The stabilizer is at least one of potassium hydroxide solution and sodium hydroxide solution; and / or The dispersant is at least one of casein solution and polyvinyl alcohol solution; More preferably, The casein solution comprises casein, borax, ammonia, and water.

4. The Eucommia ulmoides latex marine antifouling coating according to claim 3, characterized in that: The concentration of the dispersant is 9–10 wt%; and / or The concentration of the stabilizer is 9–10 wt%; and / or The concentration of the dispersant is 10–11 wt%.

5. The Eucommia ulmoides latex marine antifouling coating according to claim 3, characterized in that: The weight ratio of the antifouling agent, the filler, and the filler additive is 1.5–2:0.4–1:1, preferably 1.8–2:0.5–0.7:1; and / or The weight ratio of the dispersant, the diffusion agent, and the stabilizer is 7–10:2–4:2, preferably 8–9:3–4:2; and / or The mass ratio of the talc powder to the fumed silica is 5 to 15:1, preferably 6 to 13:

1.

6. The Eucommia ulmoides latex marine antifouling coating according to claim 1, characterized in that: The average particle size of the filler slurry is 45–50 μm.

7. The Eucommia ulmoides latex marine antifouling coating according to claim 1, characterized in that: The additives are leveling agents and / or adhesion promoters; Preferably, the weight ratio of the leveling agent to the adhesion promoter is 0.01 to 0.1:

1.

8. A method for preparing the Eucommia ulmoides latex marine antifouling coating according to any one of claims 1 to 7, characterized in that: The method includes the following steps S1: The filler slurry is mixed with the Eucommia ulmoides latex and left to stand to obtain a base coating. S2: The base coating is mixed with the leveling agent and left to stand; an adhesion promoter is added to obtain the Eucommia ulmoides latex marine antifouling coating.

9. The method according to claim 8, characterized in that: In step S1, the settling time is 5–10 min; and / or In step S2, the settling time is 5 to 10 minutes.

10. The application of the Eucommia ulmoides latex marine antifouling coating according to any one of claims 1 to 7 or the Eucommia ulmoides latex marine antifouling coating prepared by the method according to any one of claims 8 to 9 on the surface of Eucommia ulmoides-based materials.

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