A renewable amphiphilic antifouling coating and a method for its preparation

Abstract

The present application relates to the technical field of paint, in particular to a renewable amphiphilic antifouling paint and a preparation method thereof. The paint comprises a component A and a component B. The raw material components of the component A include a hydrolysable polymer. The raw material components of the component B include a hydroxyl alkyl double-terminated polydimethylsiloxane, silicon dioxide, bromopyrrol nitrile, a catalyst and a solvent B. The hydrolysable polymer is polymerized from acrylate, isocyanate acrylate and silane acrylate. The paint provided by the present application is environmentally friendly. The amphiphilic polymer on the surface of the coating layer has the performance of being renewable and long-acting. The hydrolysable polymer on the surface layer is converted into a hydrophilic polymer under the action of seawater, so that the coating layer has a new amphiphilic surface. The coating layer has the advantages of smooth surface, good mechanical properties, low water absorption, good antifouling performance and drag reduction performance. In particular, under the action of seawater for a long time, the coating layer can still maintain good adhesion and antifouling performance.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a renewable amphiphilic antifouling coating and its preparation method. Background Technology

[0002] Traditional marine antifouling coatings still contain large amounts of toxic bactericides. With increasing consensus on protecting the marine environment, the development of environmentally friendly antifouling coatings has become the mainstream in this field. Among the development directions of environmentally friendly marine antifouling coatings, the introduction of amphiphilic coatings has attracted attention. These coatings have strong hydrophilicity, easily forming highly hydrophilic surfaces or combining with hydrophobic segments to form amphiphilic surfaces. They exhibit good anti-protein adhesion properties and demonstrate excellent antifouling and release performance, thus attracting considerable attention.

[0003] There are various methods for preparing amphiphilic antifouling coatings, but they all have some limitations:

[0004] First, a mixture of hydrophobic polymers and hydrophilic polymers is added to the coating to create an amphiphilic surface in the coating. However, the film-forming conditions of the co-mixed hydrophobic polymer and hydrophilic polymer coating are strict. Due to the inherent incompatibility between the hydrophobic and hydrophilic components, the antifouling performance of the prepared coating does not meet expectations.

[0005] Secondly, amphiphilic polymer additives are physically incorporated into the coating components to create an amphiphilic surface in the coating. However, in coatings made in this way, the amphiphilic polymers will continuously seep out of the coating, and the antifouling performance of the coating will gradually weaken due to the continuous seepage of the amphiphilic polymers.

[0006] Furthermore, coatings that can form amphiphilic antifouling coatings contain hydrophilic components that cause the coating substrate to absorb water and swell, resulting in reduced coating adhesion, eventually leading to peeling or breakage and thus rendering the coating ineffective. Summary of the Invention

[0007] To address the shortcomings of the prior art mentioned in the background section, this invention provides a renewable amphiphilic antifouling coating. In this coating, the hydrolyzable polymer on the surface is converted into a hydrophilic polymer under the action of seawater, thus regenerating the amphiphilic polymer on the coating surface and giving the coating a new amphiphilic surface. The technical solution of this coating is as follows:

[0008] The renewable amphiphilic antifouling coating comprises component A and component B. The raw material components of component A include a hydrolyzable polymer. The raw material components of component B include hydroxyalkyl-terminated polydimethylsiloxane, silica, brominated pyrrolidone, a catalyst, and solvent B. The hydrolyzable polymer is polymerized from acrylate, isocyanate acrylate, and silane acrylate. The mass ratio of acrylate, isocyanate acrylate, and silane acrylate is (10-45):(10-35):(10-40).

[0009] In some embodiments, the preparation process of the hydrolyzable polymer is as follows: Solvent A is added to a reactor, and under an inert gas atmosphere, the solvent A is heated to 60-115°C. Then, over a period of 2-4 hours, a mixture of acrylate, isocyanate acrylate, silane acrylate, and initiator is added to the reactor sequentially, and the reaction is continued at a reaction temperature of 60-115°C for 5-10 hours to obtain a transparent hydrolyzable polymer. The mass ratio of the acrylate, isocyanate acrylate, silane acrylate, initiator, and solvent A is (10-45):(10-35):(10-40):(1-8):(20-65).

[0010] In some embodiments, the acrylate is any one or a mixture of methyl methacrylate, ethyl acrylate, propyl methacrylate, butyl methacrylate, and octyl methacrylate;

[0011] In some embodiments, the isocyanate acrylate is any one or a mixture of two of ethyl isocyanate methacrylate and ethyl isocyanate acrylate;

[0012] In some embodiments, the silane acrylate is any one or a mixture of trimethyl acrylate, triethyl acrylate, triisopropyl acrylate, tributyl acrylate, triisobutyl acrylate, trimethyl methacrylate, triethyl methacrylate, triisopropyl methacrylate, tributyl methacrylate, and tributyl methacrylate.

[0013] In some embodiments, the inert gas is any one or a mixture of helium and nitrogen;

[0014] In some embodiments, solvent A is any one or a combination of two of hydrocarbon solvents, ester solvents, and ketone solvents; the hydrocarbon solvent is any one or a combination of two of toluene, xylene, and trimethylbenzene; the ketone solvent is any one or a combination of two of methyl ethyl ketone, butanone, and cyclohexanone; and the ester solvent is any one or a combination of two of butyl acetate and ethyl acetate.

[0015] In some embodiments, the initiator is any one or a mixture of azo compounds and peroxides; the azo compound is any one or a mixture of azobisisobutyronitrile, azomethylbutyronitrile, and azodimethylvalerate; and the peroxide is any one or a mixture of benzoyl peroxide, tert-butyl peroxyacetate, and tert-butyl peroxybenzoate.

[0016] In some embodiments, the molecular weight of the hydrolyzable polymer is 500 to 30,000.

[0017] In some embodiments, the raw material components of component B, by mass, include: 35-60 parts of hydroxyalkyl-terminated polydimethylsiloxane, 3-6 parts of silica, 1-5 parts of brominated pyrrolidone, 0-4 parts of pigments and fillers, 0.1-0.5 parts of catalyst, and 20-50 parts of solvent B; the mass ratio of component A to component B is 100:(20-40).

[0018] In some embodiments, the hydroxyalkyl-terminated polydimethylsiloxane is any one or a mixture of hydroxymethyl-terminated polydimethylsiloxane, hydroxyethyl-terminated polydimethylsiloxane, hydroxypropyl-terminated polydimethylsiloxane, and hydroxybutyl-terminated polydimethylsiloxane.

[0019] In some embodiments, the molecular weight of the hydroxyl-terminated double-ended polydimethylsiloxane is 200–150,000, preferably 500–50,000; the silica is selected from materials with a specific surface area greater than 10 m². 2 / g of silica, preferably with a specific surface area of ​​20-300m² 2 / g of silicon dioxide;

[0020] In some embodiments, solvent B is any one or a mixture of aromatic hydrocarbon solvents, ketone solvents, and ester solvents; for example, toluene, xylene, trimethylbenzene, methyl ethyl ketone, butanone, cyclohexanone, 4-methyl-2-pentanone, butyl acetate, and ethyl acetate.

[0021] In some embodiments, the pigments and fillers are any one or more mixtures of titanium dioxide, iron yellow, iron red, carbon black, silicate, barium sulfate, and silica.

[0022] In some embodiments, the catalyst is any one or a mixture of amine compounds, amine salts, and metal salts of organic carboxylic acids; wherein the amine compounds are, for example, hexylamine and dodecylamine phosphate; the quaternary ammonium salts are, for example, benzyltrimethylammonium acetate and hexylammonium acetate; and the metal salts of organic carboxylic acids are, for example, stannous octoate, dibutyltin dilaurate, zinc naphthenate, and zinc stearate.

[0023] This invention provides a method for preparing the renewable amphiphilic antifouling coating as described above, comprising the following preparation steps: mixing and dispersing the raw material components of component B to obtain component B; mixing and dispersing component A and component B to obtain the renewable amphiphilic antifouling coating.

[0024] Based on the above, compared with the prior art, the renewable amphiphilic antifouling coating provided by the present invention has the following beneficial effects:

[0025] The coating provided by this invention is environmentally friendly. The amphiphilic polymer formed on the coating surface has renewable and long-lasting properties. The solution of this invention allows the hydrolyzable polymer on the surface to be transformed into a hydrophilic polymer under the action of seawater, thereby giving the coating a new amphiphilic surface. The resulting coating surface is smooth, has good mechanical properties, low water absorption, and good antifouling and drag reduction properties. In particular, it can maintain good adhesion and antifouling properties even under the action of seawater for a long time.

[0026] Other features and beneficial effects of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects of the invention and other beneficial effects may be realized and obtained by means of the structures and / or components pointed out in the description and claims. Attached Figure Description

[0027] Figure 1 A schematic diagram illustrating the preparation and hydrolysis process and principle of the coating provided by this invention;

[0028] Figure 2 A schematic diagram illustrating the hydrolysis process and principle of the coating surface obtained by the coating provided in this invention under the action of seawater.

[0029] Figure reference numerals: 100 hydrolyzable polymer, 200 hydroxyl-terminated polydimethylsiloxane, 300 amphiphilic substance, 400 hydrophobic coating, 500 surface amphiphilic coating. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. The technical features designed in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that all terms used in this invention (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and should not be construed as limiting the invention; it should be further understood that the terms used in this invention should be understood to have the same meaning as those in the context of this specification and in the relevant field, and should not be understood in an idealized or overly formal sense, except as expressly defined in this invention.

[0032] This invention provides a method for preparing a renewable amphiphilic antifouling coating, comprising the following steps:

[0033] (1) Mix the raw material components of component B and disperse them evenly to obtain component B;

[0034] (2) Mix component A and component B and disperse them evenly at a speed of 1000-2000 r / min to obtain the renewable amphiphilic antifouling coating.

[0035] The formulations of components A and B are as follows:

[0036] The mass ratio of component A to component B is 100:(20-40).

[0037] The raw material component of component A is a hydrolyzable polymer;

[0038] By mass, the raw material components of component B include: 35-60 parts of hydroxyalkyl-terminated polydimethylsiloxane, 3-6 parts of silica, 1-5 parts of brominated pyrrolidone, 0-4 parts of pigments and fillers, 0.1-0.5 parts of catalyst, and 20-50 parts of solvent B.

[0039] The hydrolyzable polymer is prepared in-house, and the preparation process is as follows:

[0040] Solvent A is added to the reactor and heated to 60–115°C under an inert gas atmosphere. Then, over a period of 2–4 hours, a mixture of acrylate, isocyanate acrylate, silane acrylate, and initiator is added dropwise to the reactor. The reaction is continued at a temperature of 60–115°C for 5–10 hours to obtain a transparent hydrolyzable polymer. The mass ratio of acrylate, isocyanate acrylate, silane acrylate, initiator, and solvent A is (10–45):(10–35):(10–40):(1–8):(20–65).

[0041] Wherein, the acrylate is any one or a mixture of methyl methacrylate, ethyl acrylate, propyl methacrylate, butyl methacrylate, and octyl methacrylate; the isocyanate acrylate is any one or a mixture of two of isocyanate methacrylate and isocyanate methacrylate; and the silane acrylate is any one or a mixture of trimethyl methacrylate, triethyl methacrylate, triisopropyl methacrylate, tributyl methacrylate, triisobutyl methacrylate, trimethyl methacrylate, triethyl methacrylate, triisopropyl methacrylate, tributyl methacrylate, and tributyl methacrylate.

[0042] The present invention also provides the following embodiments and comparative examples of formulations (unit: parts by weight), as shown in Table 1 below:

[0043] Table 1

[0044]

[0045] The raw material formulations for preparing hydrolyzable polymers are shown in Table 1, and are also shown in Table 2 below:

[0046] Table 2

[0047] Material Name Example 1 Example 2 Example 3 Example 4 Methyl methacrylate 20 23 18 28 ethyl isocyanate methacrylate 15 18 20 13 Tributylsilane acrylate 20 22 18 25 Initiator: Azobisisobutyronitrile 1 1.5 2 3 Solvent A: Xylene 57 59 62 65

[0048] The specific selection of each raw material component is as follows in Table 1-2:

[0049] The hydroxyalkyl-terminated polydimethylsiloxane used is a hydroxyethyl-terminated polydimethylsiloxane, specifically McLean C833857, whose structural formula is as follows:

[0050]

[0051] The silica used has a specific surface area of ​​100 m². 2 / g of silica; titanium dioxide was used as pigment and filler; xylene was used as solvent B; and ammonium hexylacetate was used as catalyst.

[0052] The preparation process of the hydrolyzable polymer is as follows:

[0053] Xylene was added to a four-necked flask, and the flask was heated to 70°C under a nitrogen atmosphere. Over 2 hours, a mixture of methacrylate, isocyanate methacrylate, tributylsilane acrylate and azobisisobutyronitrile was added dropwise to the flask, and the mixture was heated at 70°C for 4 hours to synthesize a transparent hydrolyzable polymer P.

[0054] The preparation process of amphiphilic antifouling coatings is as follows:

[0055] Mix the raw materials of component B and disperse them evenly to obtain component B; add component A and component B to a dispersion tank and disperse at 1500 r / min for 20 minutes to obtain an amphiphilic antifouling coating.

[0056] The coatings prepared by mixing the above-mentioned examples and comparative examples at a mass ratio of A:B of 100:30 were tested, and compared with an existing control sample (commercially available amphiphilic antifouling coating) as Comparative Example 1. The test results are shown in Tables 3-4 below:

[0057] Table 3. Test results of coating performance after immersion in seawater.

[0058]

[0059] In Table 3, the surface roughness of the coating was tested using a confocal microscope with a three-dimensional optical profilometer, and the adhesion of the dried coating was determined using a pull-out adhesion tester in accordance with GB / T5210—2006.

[0060] Comparative sample: Commercially available amphiphilic coatings, which are specifically a mixture of hydrophobic and hydrophilic polymers.

[0061] Table 4 Results of the Qianhai Plumbing Project (4 months)

[0062]

[0063]

[0064] Table 4 shows the results of the tests conducted according to the national standard GB / T 5370-2007 "Test Method for Shallow Sea Immersion of Antifouling Paint Samples". The higher the score, the better the antifouling performance.

[0065] Analysis of the data results from the examples and comparative examples shows that:

[0066] (1) The amphiphilic antifouling coating prepared in the example has hydrolyzable substances that hydrolyze on the coating surface and adsorb a small amount of water, and the coating surface changes from hydrophobic to amphiphilic. Compared with existing amphiphilic antifouling coatings, the coating prepared in the example has a smaller surface roughness, which is beneficial for the coating to prevent fouling and reduce drag. Moreover, under the long-term action of seawater, the adhesion of the coating decreases very little, indicating that the coating maintains good mechanical properties. (2)

[0068] The amphiphilic antifouling coatings prepared in the examples have good antifouling effects.

[0069] In summary, the renewable amphiphilic antifouling coating technology provided by this invention includes at least the following design concepts, mechanisms of action, and beneficial effects:

[0070] 1. Design concept and mechanism of action

[0071] like Figure 1 As shown, the hydrolyzable polymer 100 itself is a polymer containing ester groups, which is hydrophobic. The hydroxyl-terminated polydimethylsiloxane 200 and silica are also hydrophobic. After mixing components A and B, the hydrolyzable polymer 100 and the hydroxyl-terminated polydimethylsiloxane 200 undergo an amination reaction to form a cross-linked hydrophobic polymer 300. The hydrolyzable polymer (including the ester groups) undergoes hydrolysis under the influence of seawater, forming hydrophilic segments, while other segments remain hydrophobic, thus forming an amphiphilic polymer 400. Figure 2 As shown, when the coating is prepared into a coating layer, as the hydrophobic surface of the coating O comes into contact with seawater, the coating surface gradually hydrolyzes to form the amphiphilic surface of the coating L. At the same time, small molecular chain segments are continuously peeled off during the hydrolysis process, thus making the amphiphilic nature of the coating surface renewable.

[0072] As can be seen from the above, the coating of the present invention is initially hydrophobic. After being soaked in seawater, the surface of the coating hydrolyzes to form an amphiphilic coating, while the interior of the coating remains hydrophobic. After hydrolysis, only the surface of the coating adsorbs a trace amount of water. Compared with the existing coating schemes that directly mix hydrophobic polymers and hydrophilic polymers or physically incorporate amphiphilic polymer additives, the coating of the present invention has a low overall water absorption rate, good adhesion after soaking, and excellent antifouling performance.

[0073] 2. Beneficial effects:

[0074] This invention utilizes a self-made hydrolyzable polymer and combines it with raw material components such as the hydrolyzable polymer, hydrocarbon-based double-terminated polydimethylsiloxane, catalyst, pigments, and fillers to obtain a renewable amphiphilic polymer and an antifouling coating.

[0075] Using the technical solution described above, the coating provided by the present invention is environmentally friendly. The amphiphilic polymer formed on the surface of the coating has renewable and long-lasting properties. The present invention can transform the hydrolyzable polymer on the surface into a hydrophilic polymer under the action of seawater, thereby giving the coating a new amphiphilic surface. The resulting coating surface is smooth, has good mechanical properties, low water absorption, and good antifouling and drag reduction properties. In particular, it can maintain good adhesion and antifouling properties even under the action of seawater for a long time.

[0076] It should be noted that:

[0077] In this article, “~” is used to represent the range of values, and the range of values ​​represented by this expression includes two endpoint values.

[0078] In addition to the actual choices shown in the specific embodiments above, preferably, the inert gas is selected from any one or a mixture of helium and nitrogen, including but not limited to the above-described embodiments;

[0079] In addition to the actual selections shown in the specific embodiments above, preferably, solvent A is selected from any one or a combination of two of hydrocarbon solvents, ester solvents, and ketone solvents; wherein, the hydrocarbon solvent is selected from any one or a combination of two of toluene, xylene, and trimethylbenzene; the ketone solvent is selected from any one or a combination of two of methyl ethyl ketone, butanone, and cyclohexanone; and the ester solvent is selected from any one or a combination of two of butyl acetate and ethyl acetate, including but not limited to the above-described embodiments;

[0080] In addition to the actual selections shown in the specific embodiments above, preferably, the initiator is selected from any one or more mixtures of azo compounds and peroxides; wherein, the azo compound is selected from any one or more mixtures of azobisisobutyronitrile, azomethylbutyronitrile, and azodimethylpentanonitrile, and the peroxide is selected from any one or more mixtures of benzoyl peroxide, tert-butyl peroxide, and tert-butyl peroxide, including but not limited to the above-described embodiments.

[0081] In addition to the actual selections shown in the specific embodiments above, preferably, the hydroxyalkyl-terminated polydimethylsiloxane is selected from any one or more mixtures of hydroxymethyl-terminated polydimethylsiloxane, hydroxyethyl-terminated polydimethylsiloxane, hydroxypropyl-terminated polydimethylsiloxane, and hydroxybutyl-terminated polydimethylsiloxane, including but not limited to the above-described embodiments.

[0082] In addition to the actual selections shown in the specific embodiments above, preferably, the solvent B is selected from any one or more mixtures of aromatic hydrocarbon solvents, ketone solvents, and ester solvents, including but not limited to the above embodiment schemes;

[0083] In addition to the actual selections shown in the specific embodiments above, preferably, the pigments and fillers are selected from any one or more mixtures of titanium dioxide, iron yellow, iron red, carbon black, silicate, barium sulfate, and silica, including but not limited to the above-described embodiments.

[0084] In addition to the specific choices shown in the above embodiments, preferably, the catalyst is selected from any one or more mixtures of amine compounds, amine salts, and metal salts of organic carboxylic acids, including but not limited to the above embodiment schemes.

[0085] The specific parameters or commonly used reagents in the above embodiments are specific or preferred embodiments under the concept of this invention, and are not intended to limit it; those skilled in the art can make adaptive adjustments within the concept and protection scope of this invention. Furthermore, unless otherwise specified, the raw materials used can also be commercially available products in the art, or prepared by conventional methods in the art.

[0086] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of the present invention can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or the background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0087] Although this document frequently uses terms such as hydroxyalkyl-terminated polydimethylsiloxane, silica, brominated pyrrolidone, catalyst, and solvent B, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention. The terms "first," "second," etc. (if present) in the description and claims of the embodiments of the invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A renewable amphiphilic antifouling coating, comprising component A and component B, characterized in that: The raw material components of component A include hydrolyzable polymers; The raw material components of component B include hydroxyl-hydroxyl-terminated polydimethylsiloxane, silica, brominated pyrrolidone, catalyst, and solvent B. The hydrolyzable polymer is polymerized from acrylate, isocyanate acrylate, and silane acrylate; wherein the mass ratio of acrylate, isocyanate acrylate, and silane acrylate is (10-45):(10-35):(10-40). The preparation process of the hydrolyzable polymer is as follows: Solvent A is added to the reactor and heated to 60-115°C under an inert gas atmosphere. Then, over a period of 2-4 hours, a mixture of acrylate, isocyanate ethyl acrylate, silane acrylate and initiator is added to the reactor in sequence. The reaction is continued at a temperature of 60-115°C for 5-10 hours to obtain a transparent hydrolyzable polymer. The mass ratio of the acrylate, isocyanate acrylate, silane acrylate, initiator, and solvent A is (10-45):(10-35):(10-40):(1-8):(20-65); The acrylate is any one or a mixture of methyl methacrylate, ethyl acrylate, propyl methacrylate, butyl methacrylate, and octyl methacrylate; the isocyanate acrylate is any one or a mixture of two of ethyl isocyanate methacrylate and ethyl isocyanate; the silane acrylate is any one or a mixture of trimethyl methacrylate, triethyl methacrylate, triisopropyl methacrylate, tributyl methacrylate, triisobutyl methacrylate, trimethyl methacrylate, triethyl methacrylate, triisopropyl methacrylate, tributyl methacrylate, and tributyl methacrylate. By weight, the raw material components of component B include: 35-60 parts of hydroxyalkyl-terminated polydimethylsiloxane, 3-6 parts of silica, 1-5 parts of brominated pyrrolidone, 0-4 parts of pigments and fillers, 0.1-0.5 parts of catalyst, and 20-50 parts of solvent B; Wherein, the hydroxyalkyl-terminated polydimethylsiloxane is any one or a mixture of hydroxymethyl-terminated polydimethylsiloxane, hydroxyethyl-terminated polydimethylsiloxane, hydroxypropyl-terminated polydimethylsiloxane, and hydroxybutyl-terminated polydimethylsiloxane; the molecular weight of the hydroxyalkyl-terminated polydimethylsiloxane is 200 to 150,000; and the silica is selected from silica with a specific surface area greater than 10 m² / g. The mass ratio of component A to component B is 100:(20-40).

2. The renewable amphiphilic antifouling coating according to claim 1, characterized in that: The inert gas is any one or a mixture of helium and nitrogen; Solvent A is any one or a combination of two of hydrocarbon solvents, ester solvents, and ketone solvents; the hydrocarbon solvent is any one or a combination of two of toluene, xylene, and trimethylbenzene; the ketone solvent is any one or a combination of two of methyl ethyl ketone, butanone, and cyclohexanone; and the ester solvent is any one or a combination of two of butyl acetate and ethyl acetate. The initiator is any one or a mixture of azo compounds and peroxides; the azo compound is any one or a mixture of azobisisobutyronitrile, azomethylbutyronitrile, and azodimethylpentanonitrile; the peroxide is any one or a mixture of benzoyl peroxide, tert-butyl peroxyacetate, and tert-butyl peroxybenzoate.

3. The renewable amphiphilic antifouling coating according to claim 1, characterized in that: The molecular weight of the hydrolyzable polymer is 500 to 30,000.

4. The renewable amphiphilic antifouling coating according to claim 1, characterized in that: Solvent B is any one or a mixture of aromatic hydrocarbon solvents, ketone solvents, and ester solvents; The pigments and fillers are any one or more mixtures of titanium dioxide, iron yellow, iron red, carbon black, silicate, barium sulfate, and silica. The catalyst is any one or a mixture of amine compounds, amine salts, and metal salts of organic carboxylic acids.

5. A method for preparing a renewable amphiphilic antifouling coating according to any one of claims 1-4, characterized in that, The preparation steps include the following: Mix the raw material components of component B and disperse them evenly to obtain component B; Mix component A and component B and disperse them evenly to obtain the renewable amphiphilic antifouling coating.

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