Antifouling coating composition and application thereof

Abstract

The invention provides an antifouling coating composition and application thereof. The antifouling coating composition comprises a polysiloxane adhesive and a polymer composition, wherein the polymer composition comprises a polymer A as shown in a formula I, a polymer B as shown in a formula II, a polymer C as shown in a formula III and a polymer D as shown in a formula IV; r1 and R3 are independently selected from a benzene ring or a straight chain alkyl group, R2 and R4 are independently selected from a furan ring, a benzene ring, a pyrazine ring or a straight chain alkyl 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 has good compatibility with epoxy, acrylic acid or polyurethane primer, and can be firmly bonded with the epoxy, acrylic acid or polyurethane primer, so that a connecting layer can be avoided, and meanwhile, the antifouling coating also has excellent dynamic / static antifouling capability 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 the fields of marine antifouling and the like. Background Art

[0002] Antifouling coating systems are widely used in facilities such as ships, oil production platforms and buoys that are in contact with water, especially seawater, to prevent marine microorganisms, animals and plants from attaching, growing and breeding on such facilities. Existing antifouling coating systems usually include a primer layer, an intermediate layer (also known as a connecting layer) and an antifouling layer, wherein the primer layer is mainly used to slow down or prevent the steel substrate from being corroded by seawater, and the intermediate layer is mainly used to firmly connect the antifouling layer to the primer layer. Especially for polysiloxane antifouling layers, their bonding strength with epoxy, acrylic or polyurethane primers is poor, so the intermediate layer is particularly necessary, but this will lead to a substantial increase in cost, and will also complicate the coating construction process and increase working 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] In order to achieve the above-mentioned invention object, the technical solution adopted in this application includes:

[0005] One aspect of the present application provides an antifouling coating composition, which includes a polysiloxane adhesive 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] Among them, R 1 , R 3 R is independently selected from a benzene ring or a straight chain hydrocarbon group having 1 to 10 carbon atoms, 2 , R 4 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, R 5 , R 6Independently selected from any one of substituted or unsubstituted alkyl, substituted or unsubstituted aryl, 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 the field of antifouling on the surface of an object, especially in the field of marine antifouling.

[0010] Compared with the prior art, the antifouling coating composition provided by the present application is prepared by selecting a polymer composition comprising polymer A, polymer B, polymer C and polymer D and combining it with 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 combined with various types of primer layers. On the other hand, due to Polymer A, polymer B, polymer C, polymer D and polysiloxane adhesives can undergo various types of reactions (such as dehydration condensation reaction, addition reaction, etc.) to cross-link with each other, so that the formed antifouling coating has excellent mechanical properties. On the other hand, polymer A, polymer B and polymer C can provide groups with antibacterial functions (such as oxime ester groups, Schiff base groups, etc.) and hydrophilic groups (such as carbamate groups, carboxybetaine groups, sulfobetaine groups, phosphorylcholine groups, etc.), and 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying 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 characteristics 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 adhesive 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] Among them, R 1 , R 3 R is independently selected from a benzene ring or a straight chain hydrocarbon group having 1 to 10 carbon atoms, 2 , R 4 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, R 5 , R 6 Independently selected from any one of substituted or unsubstituted alkyl, substituted or unsubstituted aryl, 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 abundant hydrophilic sites. Preferably, R 5 , R 6 Independently selected from a C1-C10 straight chain or branched chain alkyl or phenyl.

[0019] In one embodiment, the polymer composition comprises 5wt% to 25wt% polymer A, 5wt% to 25wt% polymer B, 10wt% to 30wt% polymer C and 45wt% to 85wt% polymer D. Preferably, the polymer composition comprises 10wt% to 20wt% polymer A, 10wt% to 20wt% polymer B, 15wt% to 30wt% polymer C and 55wt% to 75wt% polymer D. By adopting these preferred component designs, the antifouling coating can have better adaptability to different primer layers, higher bonding strength, better dynamic and static antifouling performance, and stronger mechanical properties. Furthermore, the sum of the masses of the polymers A, B, C, and D is 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 10,000-60,000.

[0024] Preferably, the weight average molecular weight of polymer A is 8000-20000, the weight average molecular weight of polymer B is 8000-20000, the weight average molecular weight of polymer C is 3000-8000, and the weight average molecular weight of 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 the present application can be any curable polysiloxane adhesive, preferably an organopolysiloxane having a curing reaction functional group at the end or side chain, and each molecule of the organopolysiloxane has at least two curing reaction functional groups. The curing reaction functional group can be at least selected from a combination of one or more of silanol, alkoxy, acetoxy, alkenyloxy, ketoxime, hydroxyl, amine, epoxy, and isocyanate, for example, preferably selected from silanol, alkoxy or acetoxy, etc. The corresponding curing reaction can be a condensation curing reaction, an amine / epoxy curing reaction, etc., and 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 adhesive described in this application can be obtained through commercial purchases, for example, Dow Corning's The brand series of OHX-4000, OHX-4010, OHX-4040 and other silicone adhesives, silanol-terminated polysiloxanes such as DMS-S32, DMS-S33, DMS-S35 sold by Gelest, etc., are not limited to these.

[0030] In some cases, an appropriate amount of crosslinking agent, curing agent, etc. can also be added to the polysiloxane adhesive. Exemplary crosslinking agents such as tetraethoxysilane, vinyl tris (methylethyl oxime) silane, methyl tris (methylethyl oxime) silane, vinyl trimethoxy silane, methyl trimethoxy silane and vinyl triisopropylene oxy silane 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, a suitable 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, ...octanoate, 2-ethylhexanoate, dibutyltin dioctanoate, 2-ethylhexanoate, dibutyltin dioctanoate, 2-ethylhexanoate, dibutyltin dioctanoate, 2-ethylhexanoate, dibutyltin dioctanoate, 2-ethylhexanoate, dibutyltin dioctanoate, 2-ethylhexanoate, di Dioctyltin dioctylhexanoate, dioctyltin dineodecanoate, dioctyltin dimethoxy, dioctyltin dibenzoate, dioctyltin acetylacetonate, dioctyltin acetylacetonate, dioctyltin alkyl acetylacetonate, dimethyltin dibutyrate, dimethyltin dineodecanoate, dimethyltin dineodecanoate, tin naphthenate, tin butyrate, tin oleate, tin octanoate, tin stearate, iron stearate, iron 2-ethylhexanoate, lead octanoate, lead 2-ethyloctanoate, 2 -Cobalt 2-ethylhexanoate, cobalt naphthenate, manganese 2-ethylhexanoate, zinc 2-ethylhexanoate, zinc naphthenate, zinc stearate, trifluoromethanesulfonic acid metal salts, triethyltin tartrate, stannous octoate, trimethylphenyltin suberate, 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 tetrabutyl titanium, tetrapropoxide titanium, tetraisopropoxide titanium, tetrabutyl zirconate, tetra(2-ethylhexyl) zirconate, triethanolamine zirconate, tetra(isopropenyloxy)-zirconate, zirconium tetrabutoxide, zirconium tetrapropoxide, zirconium tetraisopropoxide, and chelated titanates such as bis(acetylacetonato)titanate diisopropyl, bis(ethylacetylacetonato)titanate diisopropyl, and bis(ethylacetoacetate)diisopropoxytitanium. The type and amount of the catalyst may be determined according to 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, solvents, fillers or auxiliary agents can also be added to the antifouling coating composition. The auxiliary agent can include one or more combinations of reinforcing agent, thixotropic agent, thickener, anti-settling agent, dehydrating agent, dispersant, wetting agent, surfactant, adhesive, plasticizer and pigment. 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 the solvent added can be determined according to the actual construction requirements, for example, it can be controlled to be 0-35% of the total mass of the antifouling coating composition. The solvent should not be added as much as possible to prevent the presence of organic solvents from damaging the performance of the antifouling coating, and to save costs and protect the environment. The filler can be selected from inorganic fillers such as zinc oxide, red iron oxide, barium sulfate, calcium sulfate, calcium carbonate, silicon dioxide or silicate, and can also be selected from solid organic silicone resin powder. The amount of the filler added also depends on the actual application requirements, which can be controlled to be 0-20% of the total mass of the antifouling coating composition. The thixotropic agent, thickener and anti-settling agent can be selected from one or more combinations of fumed silica, organic modified clay, amide wax, polyamide wax, amide derivatives, polyethylene wax, oxidized polyethylene wax, hydrogenated castor oil wax, etc. The dehydrating agent 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, vinyl trimethoxysilane, phenyl trimethoxysilane, tetraethoxysilane, ethyl polysilicate, etc. The total amount of the auxiliary agent added can be 5 to 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, which specifically comprises: uniformly mixing at least a polysiloxane adhesive and a polymer composition.

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

[0036] The operation of uniformly mixing the polysiloxane adhesive and the polymer composition may 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 layer 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, including a substrate, at least a portion of the surface of the substrate is 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.

[0043] The antifouling coating composition can be applied to the surface of an object by spin coating, scraper coating, spray coating and other methods, so that the antifouling coating 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, and the antifouling coating also 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 in detail 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 examples and not limitations.

[0048] The polysiloxane adhesives and polymers A, B, C, etc. used in the following examples and comparative examples are 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 polymers A used in the following examples are numbered A1, A2, A3, A4, and A5. 1 is a para-substituted benzene ring, R 2 A2: R 1 is a straight chain hydrocarbon group with 2 carbon atoms, R 3 A3: R 1 is a straight chain hydrocarbon group with 10 carbon atoms, R 2 A4: R 1 is a straight chain hydrocarbon group with 10 carbon atoms, R 2 It is a para-substituted benzene ring with a weight average molecular weight of about 12000; A5: R 1 is a para-substituted benzene ring, R 2 It is a C3 straight chain hydrocarbon group with a weight average molecular weight of about 15,000.

[0050] The polymers B used in the following examples are numbered B1, B2, and B3. 3 is a para-substituted benzene ring, R 4 It is a 2,5-disubstituted furan ring with a weight average molecular weight of about 8000; B2: R 3 is a straight chain hydrocarbon group with 2 carbon atoms, R 4 It is a 2,5-disubstituted furan ring with a weight average molecular weight of about 10,000; B3: R 3 is a straight chain hydrocarbon group with 10 carbon atoms, R 4 It is a 2,5-disubstituted furan ring with a weight average molecular weight of about 12,000.

[0051] The polymers C used in the following examples are numbered C1, C2, C3, and C4. In C1, Y is a 2,5-disubstituted furan ring, R 5 , R 6 are all straight-chain hydrocarbon groups with carbon 3, and the weight average molecular weight is about 3000; C2: Y is a 2,5-disubstituted furan ring, R 5 , R 6 are all para-substituted benzene rings with a weight average molecular weight of about 8000; C3: Y is a 2,5-disubstituted furan ring, R 5 , R 6 All of them are straight-chain hydrocarbon groups with carbon 10, and the weight average molecular weight is about 12000; C4: Y is a para-substituted benzene ring, R 5 , R 6 They are all straight-chain hydrocarbon groups with 10 carbon atoms and a weight-average molecular weight of about 12,000.

[0052] The polymers D used in the following examples are numbered D1, D2, D3, and D4, respectively. Among them, D1: weight average molecular weight is about 22,000, n: m: p: q = 16: 2: 3: 1; D2: weight average molecular weight is about 35,000, n: m: p: q = 75: 1: 1: 1; D3: weight average molecular weight is about 50,000, n: m: p: q = 19: 3: 3: 3; D4: weight average molecular weight is about 41,000, 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: according to the formula shown in Table 1, the polysiloxane adhesive, polymers A, B, C, D and a catalyst are uniformly mixed at room temperature.

[0054] In the following examples, the rating criteria for the coupon performance of the 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 by 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 coating in Examples 1-12

[0062]

[0063] Table 4 Performance test results of antifouling coating in comparative examples 1-5

[0064]

[0065]

[0066] Remark:

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

[0068] 2. The test method for the adhesion strength between each coating in Table 3 and Table 4 and the epoxy anti-corrosion coating is: the test is carried out according to ASTM D3359-2002 "Adhesion by Tape Method", and 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 test method for the antifouling performance of each coating in Table 3 and Table 4 is as follows: According to GB / T 5370-2007 “Shallow Sea Immersion Test Method for Antifouling Paint Samples”, a real sea hanging test was carried out in the East China Sea from January 2023 to October 2024, without any treatment of the surface coating.

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

[0072] Table 5 Adhesion test results evaluation basis

[0073]

[0074] The above embodiments are only intended to illustrate the technical concept and efficacy of the present application, and the purpose is to enable persons familiar with the technical field to understand the content of the present application and implement it accordingly. However, these embodiments do not constitute a limitation on the scope of protection of the present application. Any equivalent transformation or modification made on the premise of the spirit and technical idea of ​​the present application should be covered by the claims of the present application.

Claims

1. An antifouling coating composition, characterized in that: The antifouling coating composition comprises a polysiloxane adhesive 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; Among them, R1 and R3 are independently selected from a benzene ring or a straight-chain hydrocarbon group with 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 with 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, a = 10 to 200, b = 10 to 200, c = 5 to 300, n = 1 to 60, and n:m:p:q = 75 to 95:5 to 15:1 to 15:1 to 15.

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

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

4. The antifouling coating composition according to claim 1, characterized in that: The weight average molecular weight of the polymer A is 5000-50000; and / or, the weight average molecular weight of the polymer B is 5000-50000; and / or, the weight average molecular weight of the polymer C is 3000-20000; and / or, the weight average molecular weight of the polymer D is 10000-60000.

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, an adhesive, 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 bromopyrrole nitrile 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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