Antifouling coating composition and application thereof

Abstract

The present application provides an antifouling coating composition and its application. The antifouling coating composition comprises a polysiloxane adhesive and a polymer composition, wherein the polymer composition comprises a polymer A represented by formula I, a polymer B represented by formula II, a polymer C represented by formula III, and a polymer D represented by formula IV; wherein R1 and R3 are independently selected from a benzene ring or a straight-chain hydrocarbon group, R2 and R4 are independently selected from a furan ring, a benzene ring, a pyrazine ring, or a straight-chain hydrocarbon group, Y is selected from a furan ring or a benzene ring, and R5 and R6 are independently selected from a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group. The antifouling coating formed by the antifouling coating composition of the present application has good compatibility with epoxy, acrylic, or polyurethane primers, and can firmly adhere to each other, thereby eliminating the need for a tie layer. At the same time, the antifouling coating also has excellent dynamic / static antifouling capabilities and mechanical properties.

Description

Technical Field

[0001] The present application relates to a coating, in particular to an antifouling coating composition and its application in fields such as marine antifouling. Background Art

[0002] Antifouling coating systems are widely used in facilities that come into contact with water, particularly seawater, such as ships, oil platforms, and buoys, to prevent marine microorganisms, animals, and plants from adhering to, growing, and reproducing on such facilities. Existing antifouling coating systems typically include a primer layer, an intermediate layer (also known as a tie layer), and an antifouling layer. The primer layer is primarily used to slow down or prevent corrosion of the steel substrate by seawater, while the intermediate layer is primarily used to firmly connect the antifouling layer to the primer layer. Polysiloxane antifouling layers, in particular, have poor adhesion to epoxy, acrylic, or polyurethane primers, making an intermediate layer particularly necessary. However, this can lead to a significant increase in cost and complicate the coating construction process, increasing work hours. Summary of the Invention

[0003] The main purpose of the present application is to provide an antifouling coating composition and its application, thereby overcoming the defects of the prior art.

[0004] To achieve the above-mentioned invention objectives, the technical solutions adopted in this application include:

[0005] One aspect of the present application provides an antifouling coating composition, which includes a polysiloxane binder and a polymer composition, wherein the polymer composition includes 1 wt% to 30 wt% of a polymer A represented by formula I, 1 wt% to 30 wt% of a polymer B represented by formula II, 5 wt% to 30 wt% of a polymer C represented by formula III, and 10 wt% to 90 wt% of a polymer D represented by formula IV, and the polymer composition accounts for 1% to 30% of the total mass of the antifouling coating composition;

[0006]

[0007]

[0008] wherein R1 and R3 are independently selected from a benzene ring or a straight-chain hydrocarbon group having 1 to 10 carbon atoms, R2 and R4 are independently selected from a furan ring, a benzene ring, a pyrazine ring or a straight-chain hydrocarbon group having 1 to 3 carbon atoms, Y is selected from a furan ring or a benzene ring, R5 and R6 are independently selected from any one of a substituted or unsubstituted alkyl group and a substituted or unsubstituted aryl group, a=10-200, b=10-200, c=5-300, n=1-60, and n:m:p:q=75-95:5-15:1-15:1-15.

[0009] Another aspect of the present application provides use of the antifouling coating composition or the antifouling coating formed therefrom in antifouling the surface of an object, particularly in the field of marine antifouling.

[0010] Compared with the prior art, the antifouling coating composition provided by the present application is a combination of a polymer composition comprising polymer A, polymer B, polymer C and polymer D and a polysiloxane adhesive. When the antifouling coating composition is used to form an antifouling coating, on the one hand, the abundant polar groups such as carbonyl, carboxyl, primary amine and secondary amine provided by polymer A, polymer B, polymer C and polymer D can be chemically bonded with the corresponding active groups contained in the epoxy resin, acrylic resin or polyurethane constituting the primer layer, so that the antifouling coating is firmly bonded to various types of primer layers. On the other hand, due to the Polymers A, B, C, D, and the polysiloxane binder can undergo various types of reactions (such as dehydration condensation reactions and addition reactions) to crosslink and bond with each other, resulting in an antifouling coating with excellent mechanical properties. Furthermore, polymers A, B, and C can all provide groups with antibacterial functions (such as oxime ester groups and Schiff base groups) and hydrophilic groups (such as carbamate groups, carboxybetaine groups, sulfobetaine groups, and phosphorylcholine groups), which can also enable the antifouling coating to maintain good dynamic and static antifouling properties underwater for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a real sea hanging board test of the samples in Examples 1-12 and Comparative Examples 1-5. DETAILED DESCRIPTION

[0013] In order to fully understand the purpose, technical content and features of this application, the invention scheme and implementation process are described in detail below in combination with specific implementation methods and drawings.

[0014] Some embodiments of the present application provide an antifouling coating composition comprising a polysiloxane binder and a polymer composition, wherein the polymer composition comprises 1 wt% to 30 wt% of a polymer A represented by formula I, 1 wt% to 30 wt% of a polymer B represented by formula II, 5 wt% to 30 wt% of a polymer C represented by formula III, and 10 wt% to 90 wt% of a polymer D represented by formula IV, and the polymer composition accounts for 1% to 30% of the total mass of the antifouling coating composition;

[0015]

[0016]

[0017] wherein R1 and R3 are independently selected from a benzene ring or a straight-chain hydrocarbon group having 1 to 10 carbon atoms, R2 and R4 are independently selected from a furan ring, a benzene ring, a pyrazine ring or a straight-chain hydrocarbon group having 1 to 3 carbon atoms, Y is selected from a furan ring or a benzene ring, R5 and R6 are independently selected from any one of a substituted or unsubstituted alkyl group and a substituted or unsubstituted aryl group, a=10-200, b=10-200, c=5-300, n=1-60, and n:m:p:q=75-95:5-15:1-15:1-15.

[0018] In one embodiment, Y can be selected from a para-substituted benzene ring, a meta-substituted benzene ring, or a 2,5-disubstituted furan ring. Preferably, Y is selected from a 2,5-disubstituted furan ring, which can provide more hydrophilic sites. Preferably, R5 and R6 are independently selected from a C1-C10 linear or branched alkyl group or a phenyl group.

[0019] In one embodiment, the polymer composition comprises 5-25 wt% polymer A, 5-25 wt% polymer B, 10-30 wt% polymer C, and 45-85 wt% polymer D. More preferably, the polymer composition comprises 10-20 wt% polymer A, 10-20 wt% polymer B, 15-30 wt% polymer C, and 55-75 wt% polymer D. These preferred component designs can improve the antifouling coating's adaptability to different primer layers, enhance adhesion strength, improve dynamic and static antifouling performance, and enhance mechanical properties. Furthermore, the sum of the masses of polymers A, B, C, and D constitutes 100% of the total mass of the polymer composition.

[0020] In one embodiment, the weight average molecular weight of the polymer A is 5,000 to 50,000.

[0021] In one embodiment, the weight average molecular weight of the polymer B is 5,000 to 50,000.

[0022] In one embodiment, the weight average molecular weight of the polymer C is 3,000 to 20,000.

[0023] In one embodiment, the weight average molecular weight of the polymer D is 10,000 to 60,000.

[0024] Preferably, the weight average molecular weight of the polymer A is 8000-20000, the weight average molecular weight of the polymer B is 8000-20000, the weight average molecular weight of the polymer C is 3000-8000, and the weight average molecular weight of the polymer D is 10000-50000, so that the polymer composition can be better integrated with the polysiloxane adhesive.

[0025] In one embodiment, the polymer composition accounts for 5% to 15% of the total mass of the antifouling coating composition, preferably 10% to 15%.

[0026] In one embodiment, the polysiloxane binder accounts for more than 50% of the total mass of the antifouling coating composition, preferably more than 60%, for example, 65% to 85%.

[0027] The polysiloxane adhesive described in this application can be any curable polysiloxane adhesive, preferably an organopolysiloxane having curing reaction functional groups at the end or side chains, with at least two curing reaction functional groups per molecule. The curing reaction functional groups can be selected from at least one or a combination of silanol groups, alkoxy groups, acetoxy groups, alkenyloxy groups, ketoxime groups, hydroxyl groups, amine groups, epoxy groups, and isocyanate groups, and can be preferably selected from silanol groups, alkoxy groups, or acetoxy groups. The corresponding curing reaction can be a condensation curing reaction, an amine / epoxy curing reaction, or the like, but is not limited thereto.

[0028] The weight average molecular weight of the polysiloxane adhesive described in the present application may be 400 to 150,000, preferably 1,000 to 120,000, and more preferably 5,000 to 110,000.

[0029] The polysiloxane adhesives described in this application can be obtained through commercial purchases, for example, Dow Corning's Brand series of silicone adhesives such as OHX-4000, OHX-4010, OHX-4040, silanol-terminated polysiloxanes such as DMS-S32, DMS-S33, DMS-S35 sold by Gelest, etc., but are not limited thereto.

[0030] In some cases, an appropriate amount of cross-linking agent, curing agent, etc. can also be added to the polysiloxane adhesive. Exemplary cross-linking agents such as tetraethoxysilane, vinyl tris (methylethyl oxime) silane, methyl tris (methylethyl oxime) silane, vinyl trimethoxy silane, methyl trimethoxy silane and vinyl triisopropylene oxysilane can be added. Exemplary curing agents such as diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI), 3-isocyanatopropyl trimethoxy silane, 3-isocyanatopropyl triethoxy silane, 3-aminopropyl trimethoxy silane, 3-aminopropyl triethoxy silane, (3-glycidyloxypropyl) trimethoxy silane, 3-mercaptopropyl trimethoxy silane can be added. The type and amount of the crosslinking agent and curing agent may be determined according to the type of the polysiloxane adhesive, for example, the amount of the crosslinking agent or curing agent may be 0-10% of the mass of the polysiloxane adhesive.

[0031] In some cases, an appropriate amount of catalyst may be added to the polysiloxane adhesive, such as an organic tin compound, an organic bismuth compound, an organic titanium compound, an organic zirconium compound, an organic hafnium compound, a titanate or a zirconate, etc. For example, the catalyst may be selected from, but not limited to, dibutyltin dilaurate, dibutyltin dioctoate, dibutyltin diacetate, dibutyltin 2-ethylhexanoate, dibutyltin dineodecanoate, dibutyltin dimethoxy, dibutyltin dibenzoate, dibutyltin acetylacetonate, dibutyltin acetylacetonate, alkyl dibutyltin acetylacetonate, dioctyltin dilaurate, dioctyltin dioctoate, dioctyltin diacetate, 2-ethylhexanoate, dibutyltin dineodecanoate, dibutyltin dimethoxy, dibutyltin dibenzoate, dibutyltin acetylacetonate, dibutyltin acetylacetonate, dibutyltin alkyl acetylacetonate, dioctyltin dilaurate, dioctyltin dioctoate, dioctyltin diacetate, 2-ethylhexanoate, dibutyltin dioctano ... Dioctyltin dioctylhexanoate, dioctyltin diceneodecanoate, dioctyltin dimethoxy, dioctyltin dibenzoate, dioctyltin acetylacetonate, dioctyltin acetylacetonate, dioctyltin alkyl acetylacetonate, dimethyltin dibutyrate, dimethyltin bisneodecanoate, dimethyltin diceneodecanoate, tin naphthenate, tin butyrate, tin oleate, tin octanoate, tin stearate, iron stearate, iron 2-ethylhexanoate, lead octanoate, lead 2-ethyloctanoate, 2-ethylhexanoate -Cobalt 2-ethylhexanoate, cobalt naphthenate, manganese 2-ethylhexanoate, zinc 2-ethylhexanoate, zinc naphthenate, zinc stearate, metal trifluoromethanesulfonate, triethyltin tartrate, stannous octoate, methylphenyltin trioctanoate, isobutyltin triceroate, bismuth 2-ethylhexanoate, bismuth octoate, bismuth neodecanoate, titanium naphthenate, zirconium naphthenate, tetrabutyl titanate, tetra(2-ethylhexyl) titanate, triethanolamine titanate, tetra(isopropylene oxide) The catalyst may be selected from the group consisting of: titanium (2-ethylhexyl) zirconate, titanium tetrabutoxide, titanium tetrapropoxide, titanium tetraisopropoxide, tetrabutyl zirconate, tetra(2-ethylhexyl) zirconate, triethanolamine zirconate, tetra(isopropyleneoxy) zirconate, zirconium tetrabutoxide, zirconium tetrapropoxide, zirconium tetraisopropoxide, and chelated titanates such as bis(acetylacetonato) diisopropyl titanate, bis(ethylacetylacetonato) diisopropyl titanate, and bis(ethylacetoacetate) diisopropoxy titanium. The type and amount of the catalyst may depend on the type of the polysiloxane adhesive, and may be, for example, 0.01 to 5% of the mass of the polysiloxane adhesive.

[0032] In some cases, a solvent, filler or auxiliary agent can also be added to the antifouling coating composition. The auxiliary agent can include one or more combinations of reinforcing agents, thixotropic agents, thickeners, anti-settling agents, dehydrating agents, dispersants, wetting agents, surfactants, adhesives, plasticizers and pigments. The solvent can be selected from one or more of aromatic hydrocarbons, ketones, esters, ethers, alcohols and aliphatic hydrocarbon organic solvents, for example, can be selected from xylene, toluene, mesitylene, methyl ethyl ketone, methyl isobutyl ketone, methyl amyl ketone, methyl isoamyl ketone, cyclopentanone, cyclohexanone, butyl acetate, tert-butyl acetate, amyl acetate, isoamyl acetate, ethylene glycol methyl ether acetate, propylene glycol methyl ether acetate, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, dibutyl ether, tetrahydrofuran, n-butyl alcohol, isobutyl alcohol, benzyl alcohol, butoxyethanol or 1-methoxy-2-propanol etc. The amount of solvent added can be determined based on actual application requirements; for example, it can be controlled to 0-35% of the total weight of the antifouling coating composition. Solvents should be avoided whenever possible to prevent the presence of organic solvents from impairing the performance of the antifouling coating, while also contributing to cost savings and environmental protection. The filler can be selected from inorganic fillers such as zinc oxide, red iron oxide, barium sulfate, calcium sulfate, calcium carbonate, silica, or silicates, or solid silicone resin powders. The amount of filler added also depends on actual application requirements and can be controlled to 0-20% of the total weight of the antifouling coating composition. The thixotropic agent, thickener, and anti-settling agent can be selected from one or more combinations of fumed silica, organically modified clay, amide wax, polyamide wax, amide derivatives, polyethylene wax, oxidized polyethylene wax, hydrogenated castor oil wax, and the like. Dehydrating agents can be selected from calcium sulfate hemihydrate, anhydrous calcium sulfate, anhydrous magnesium sulfate, anhydrous sodium sulfate, anhydrous zinc sulfate, molecular sieves, and zeolites. The dehydrating agent can be selected from trimethyl orthoformate, triethyl orthoformate, tripropyl orthoformate, triisopropyl orthoformate, tributyl orthoformate, trimethyl orthoacetate, triethyl orthoacetate, tributyl orthoacetate, triethyl orthopropionate, trimethyl borate, triethyl borate, tripropyl borate, triisopropyl borate, tributyl borate, tri-tert-butyl borate, trimethoxymethylsilane, vinyltrimethoxysilane, phenyltrimethoxysilane, tetraethoxysilane, ethyl polysilicate, etc. The total amount of the auxiliary agent added can be 5-30% of the total mass of the antifouling coating composition.

[0033] In some cases, an antifouling agent may be added to the antifouling coating composition. The antifouling agent is one or a combination of bromopyrrolecarbonitrile or copper pyrithione, and the antifouling agent accounts for no more than 10% of the total mass of the antifouling coating composition.

[0034] Some embodiments of the present application also provide a method for preparing the antifouling coating composition, specifically comprising: uniformly mixing at least a polysiloxane adhesive and a polymer composition.

[0035] In some cases, one or more of the solvent, filler and adjuvant may be added to the antifouling coating composition.

[0036] The operation of uniformly mixing the polysiloxane adhesive and the polymer composition can be performed at room temperature.

[0037] Some embodiments of the present application provide an antifouling coating formed from the antifouling coating composition.

[0038] The antifouling coating composition or antifouling coating of the present application can be applied to the field of marine antifouling, especially to the surface antifouling of marine facilities.

[0039] Some embodiments of the present application provide a composite antifouling coating, comprising a primer layer and an antifouling coating layer sequentially bonded to a surface of a substrate, wherein the antifouling coating layer comprises a coating formed from the antifouling coating composition.

[0040] Wherein, the primer layer comprises epoxy primer, acrylic primer or polyurethane primer, etc., preferably epoxy primer.

[0041] Some embodiments of the present application provide an object, comprising a substrate, at least a portion of the surface of the substrate being covered with the composite antifouling coating.

[0042] Some embodiments of the present application provide a method for antifouling the surface of an object, comprising: applying the antifouling coating composition on at least a portion of the surface of the object to form an antifouling coating layer.

[0043] The antifouling coating composition can be applied to the surface of an object by various methods such as spin coating, scraping coating, and spraying, so that the antifouling coating layer evenly covers the surface of the object.

[0044] The objects may be marine facilities such as ships, oil platforms, buoys, etc., or marine buildings such as lighthouses, dikes, and cross-sea bridges.

[0045] Some embodiments of the present application also provide uses of the antifouling coating composition, the antifouling coating or the composite antifouling coating in the field of marine antifouling.

[0046] The antifouling coating formed by the antifouling coating composition of the present application can be firmly combined with various types of anticorrosive primer coatings without adding an intermediate layer between the antifouling coating and the primer layer. In addition, the antifouling coating has the advantages of strong dynamic / static antifouling ability, excellent mechanical properties, erosion resistance, corrosion resistance, and long service life.

[0047] The technical solution of the present application will be further described below in conjunction with several embodiments. However, the implementation of the present application is not limited to these specific details and can also be implemented in other ways different from those described herein. Therefore, the specific embodiments presented in the present application are only for illustration and not for limitation.

[0048] The polysiloxane adhesives and polymers A, B, and C used in the following examples and comparative examples were all obtained from the market. For example, the polysiloxane adhesives used in the following examples are numbered Q1, Q2, and Q3. Among them, Q1 was purchased from Wacker, model OH-POLYMER 3900; Q2 was purchased from Dow Corning, model OHX-4010; Q3 was purchased from Dow Corning, model OHX-4040.

[0049] The various polymers A used in the following examples are numbered A1, A2, A3, A4, and A5. A1: R1 is a para-substituted benzene ring, R2 is a 2,5-disubstituted furan ring, and the weight-average molecular weight is approximately 8,000; A2: R1 is a C2 linear hydrocarbon group, R3 is a 2,5-disubstituted furan ring, and the weight-average molecular weight is approximately 10,000; A3: R1 is a C10 linear hydrocarbon group, R2 is a 2,5-disubstituted furan ring, and the weight-average molecular weight is approximately 12,000; A4: R1 is a C10 linear hydrocarbon group, R2 is a para-substituted benzene ring, and the weight-average molecular weight is approximately 12,000; A5: R1 is a para-substituted benzene ring, R2 is a C3 linear hydrocarbon group, and the weight-average molecular weight is approximately 15,000.

[0050] The various polymers B used in the following examples are numbered B1, B2, and B3. In B1, R3 is a para-substituted benzene ring, R4 is a 2,5-disubstituted furan ring, and the weight-average molecular weight is approximately 8,000; in B2, R3 is a linear hydrocarbon group with 2 carbon atoms, R4 is a 2,5-disubstituted furan ring, and the weight-average molecular weight is approximately 10,000; and in B3, R3 is a linear hydrocarbon group with 10 carbon atoms, R4 is a 2,5-disubstituted furan ring, and the weight-average molecular weight is approximately 12,000.

[0051] The various polymers C used in the following examples are numbered C1, C2, C3, and C4. In C1, Y is a 2,5-disubstituted furan ring, R5 and R6 are both linear hydrocarbon groups with 3 carbon atoms, and the weight-average molecular weight is approximately 3,000; C2: Y is a 2,5-disubstituted furan ring, R5 and R6 are both para-substituted benzene rings, and the weight-average molecular weight is approximately 8,000; C3: Y is a 2,5-disubstituted furan ring, R5 and R6 are both linear hydrocarbon groups with 10 carbon atoms, and the weight-average molecular weight is approximately 12,000; and C4: Y is a para-substituted benzene ring, R5 and R6 are both linear hydrocarbon groups with 10 carbon atoms, and the weight-average molecular weight is approximately 12,000.

[0052] The various polymers D used in the following examples are numbered D1, D2, D3, and D4. D1 has a weight-average molecular weight of approximately 22,000, and n:m:p:q = 16:2:3:1; D2 has a weight-average molecular weight of approximately 35,000, and n:m:p:q = 75:1:1:1; D3 has a weight-average molecular weight of approximately 50,000, and n:m:p:q = 19:3:3:3; and D4 has a weight-average molecular weight of approximately 41,000, and n:m:p:q = 19:1:3:2.

[0053] The preparation method of the antifouling coating composition in the following examples and comparative examples includes: uniformly mixing the polysiloxane adhesive, polymers A, B, C, D and a catalyst at room temperature according to the formulation shown in Table 1.

[0054] In the following examples, the rating standards for the coupon performance of samples with antifouling coatings are shown in Table 2.

[0055] Table 1 Formula of antifouling coating composition in Examples 1-10 and Comparative Examples 1-4

[0056]

[0057]

[0058] Table 2 Coupon performance rating standards

[0059] Rating Area covered by the defacement 0 Less than 3% 1 4％-10％ 2 11％-15％ 3 16％-25％ 4 26％-45％ 5 Greater than 45%

[0060] Various properties of the antifouling coatings formed from the coating compositions provided in Examples 1-10 and Comparative Examples 1-4 were tested, and the results are shown in Tables 3 and 4, respectively.

[0061] Table 3 Performance test results of antifouling coatings in Examples 1-12

[0062]

[0063] Table 4 Performance test results of the antifouling coating in Comparative Examples 1-5

[0064]

[0065]

[0066] Remark:

[0067] 1. The locations of the coupons for the actual offshore antifouling performance of the coatings in Tables 3 and 4 are the East China Sea.

[0068] 2. The test method for the adhesion strength of each coating in Tables 3 and 4 to the epoxy anti-corrosion coating is: the test is carried out according to ASTM D3359-2002 "Adhesion by Tape Method". The evaluation criteria are shown in Table 5.

[0069] 3. The antifouling performance of Comparative Examples 1-3 in Table 4 is mainly evaluated on the antifouling performance of the peeling part of the coating.

[0070] 4. The antifouling performance of the coatings listed in Tables 3 and 4 was tested using the following methods: Based on GB / T 5370-2007, Shallow Sea Immersion Test Method for Antifouling Paint Panels, actual sea trials were conducted in the East China Sea between January 2023 and October 2024. The surface coatings were not treated in any manner.

[0071] 5. The data shown in Tables 3 and 4 are typical values ​​after testing multiple samples.

[0072] Table 5 Evaluation basis of adhesion test results

[0073]

[0074] The above embodiments are intended only to illustrate the technical concepts and effects of this application, with the goal of enabling those familiar with this technical field to understand the content of this application and implement it accordingly. However, these embodiments do not constitute a limitation on the scope of protection of this application. Any equivalent transformations or modifications made based on the spirit and technical ideas of this application should be covered by the claims of this application.

Claims

1. An antifouling coating composition, characterized in that: The antifouling coating composition includes a polysiloxane binder and a polymer composition, wherein the polymer composition includes 1 wt% to 30 wt% of a polymer A represented by formula I, 1 wt% to 30 wt% of a polymer B represented by formula II, 5 wt% to 30 wt% of a polymer C represented by formula III, and 10 wt% to 90 wt% of a polymer D represented by formula IV, and the polymer composition accounts for 1% to 30% of the total mass of the antifouling coating composition; Wherein, R1 and R3 are independently selected from a benzene ring or a straight-chain hydrocarbon group having 1 to 10 carbon atoms, R2 and R4 are independently selected from a furan ring, a benzene ring, a pyrazine ring or a straight-chain hydrocarbon group having 1 to 3 carbon atoms, Y is selected from a furan ring or a benzene ring, R5 and R6 are independently selected from any one of a substituted or unsubstituted alkyl group and a substituted or unsubstituted aryl group, a=10-200, b=10-200, c=5-300, n=1-60, and n:m:p:q=75-95:5-15:1-15:1-15.

2. The antifouling coating composition according to claim 1, wherein: Y is selected from a 2,5-disubstituted furan ring, and R5 and R6 are independently selected from a C1 to C10 straight or branched alkyl group or a phenyl group.

3. The antifouling coating composition according to claim 1, wherein: The polymer composition comprises 5 wt% to 25 wt% of polymer A, 5 wt% to 25 wt% of polymer B, 10 wt% to 30 wt% of polymer C and 45 wt% to 85 wt% of polymer D.

4. The antifouling coating composition according to claim 1, wherein: The weight average molecular weight of the polymer A is 5,000 to 50,000; and / or the weight average molecular weight of the polymer B is 5,000 to 50,000; and / or the weight average molecular weight of the polymer C is 3,000 to 20,000; and / or the weight average molecular weight of the polymer D is 10,000 to 60,000.

5. The antifouling coating composition according to claim 1, characterized in that: The polymer composition accounts for 5% to 15% of the total mass of the antifouling coating composition; and / or the polysiloxane binder accounts for more than 50% of the total mass of the antifouling coating composition.

6. The antifouling coating composition according to claim 1, characterized in that: The antifouling coating composition further comprises a combination of one or more of a solvent, a filler and an auxiliary agent, wherein the auxiliary agent comprises a combination of one or more of an antifouling agent, a reinforcing agent, a thixotropic agent, a thickener, an anti-settling agent, a dehydrating agent, a dispersant, a wetting agent, a surfactant, a binder, a plasticizer and a pigment.

7. The antifouling coating composition according to claim 6, characterized in that: The antifouling agent is one or a combination of brominated pyrrole carbonitrile or copper pyrithione, and the antifouling agent accounts for no more than 10% of the total mass of the antifouling coating composition.

8. An antifouling coating, characterized in that: The antifouling coating is formed from the antifouling coating composition according to any one of claims 1 to 7.

9. A composite antifouling coating comprising a primer layer and an antifouling coating layer sequentially bonded to a substrate surface, characterized in that: The antifouling coating comprises a coating formed from the antifouling coating composition according to any one of claims 1 to 7.

10. The composite antifouling coating according to claim 9, characterized in that: The primer layer comprises epoxy primer, acrylic primer or polyurethane primer.

11. Use of the antifouling coating composition according to any one of claims 1 to 7, the antifouling coating according to claim 8, or the composite antifouling coating according to any one of claims 9 to 10 in the field of marine antifouling.

12. An object comprising a substrate, characterized in that: At least a portion of the surface of the substrate is covered with the composite antifouling coating according to any one of claims 9 to 10.

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