Single-component self-polishing antifouling paint suitable for surface of rubber base material and preparation method of single-component self-polishing antifouling paint

Abstract

The invention discloses a single-component self-polishing antifouling coating suitable for the surface of a rubber base material and a preparation method thereof. The single-component self-polishing antifouling coating is prepared by sequentially adding flexible antifouling resin, toughened resin, a toughening agent, rosin liquid, cuprous oxide, a composite antifouling agent, filler, pigment and a thixotropic agent into a grinding tank in proportion, stirring and dispersing uniformly. The coating provided by the invention adopts the degradable flexible resin as a base material, and the toughening resin and the toughening agent are added, so that the problems that the antifouling coating is easy to crack and poor in adhesive force on a flexible base material are solved. Meanwhile, the antifouling paint disclosed by the invention can be directly coated on a chlorinated rubber base material, and an intermediate connecting coating is not needed.

Description

Technical Field

[0001] The invention belongs to the technical field of antifouling coatings, and in particular relates to a single-component self-polishing antifouling coating suitable for the surface of a rubber substrate and a preparation method thereof. Background Art

[0002] Marine biofouling refers to the damage to underwater facilities caused by the attachment and invasion of marine organisms. These facilities include ships, docks, buoys, water pipes, oil platforms, aquaculture facilities, etc. The organisms that cause fouling are also diverse, such as oysters, mussels, barnacles, large seaweed, etc. Marine biofouling often causes huge economic losses and serious environmental problems, and there is also the threat of "invasion" of foreign organisms.

[0003] Offshore floating production storage and offloading vessels (FPSOs) are key facilities for offshore oil development. They are mainly used for the extraction, processing, storage and export of offshore oil, natural gas and other energy sources. The oil and natural gas processed by the FPSO are sent back to land through submarine pipelines or tankers. The oil and gas transportation between the FPSO and the tanker is mainly achieved through rubber hoses. These hoses float on the sea surface for a long time and often face severe marine biological fouling. The impacts caused by the attachment of organisms include: (1) significantly affecting the appearance of the pipeline, increasing the weight of the pipeline, and causing an increase in operating and maintenance costs; (2) covering the warning strips on the surface of the pipeline, which may cause the ship to collide with the pipeline; (3) biological secretions may affect the strength of the rubber, resulting in a decrease in the mechanical strength of the pipeline, posing a safety hazard. Usually, the hose will be returned to land for maintenance after a period of service, and the attached marine organisms will be mechanically removed. Since the attachment of organisms is very strong, this cleaning work is time-consuming and labor-intensive, and may also cause damage to the pipeline.

[0004] Antifouling paint is the most economical, effective and widely used technology to solve marine biofouling. However, conventional ship antifouling paint has problems such as poor adhesion, poor flexibility, easy cracking, blistering and falling off when used on rubber hoses.

[0005] There are no relevant research reports on this issue at home and abroad, only some reports on flexible antifouling coatings. Patent CN 106366882 A introduces a flexible self-polishing antifouling coating with drag reduction function and its preparation method. By adding a polymer drag reducer, the coating has a certain flexibility, but the coating described in the patent is mainly used for steel hulls and is not applicable to rubber substrates. Patent CN 116082895 A introduces a flexible fiber array coating and its preparation method. The antifouling effect is achieved through the active self-cleaning function of the capillary fibers on the surface of the coating. Its flexibility is mainly achieved by the capillary fibers. The main body of the coating is still a conventional antifouling coating, which is not applicable to rubber substrates. Summary of the invention

[0006] The present invention is proposed to solve the problem that the antifouling coating in the prior art is easy to crack and has poor adhesion on a flexible substrate, and its purpose is to provide a single-component self-polishing antifouling coating suitable for the surface of a rubber substrate and a preparation method thereof.

[0007] The present invention is achieved through the following technical solutions:

[0008] A one-component self-polishing antifouling coating suitable for the surface of a rubber substrate, the antifouling coating comprising the following components and the mass percentage of each component:

[0009]

[0010] In the above technical solution, the flexible antifouling resin is a soft segment polyurethane resin; the soft segment polyurethane resin is polyethylene adipate, polybutylene adipate or polyhexane adipate.

[0011] In the above technical solution, the toughening resin is any one of a chloroether resin or a multi-active epoxy-terminated sulfur polymer or a mixture of the two.

[0012] In the above technical solution, the toughening agent is any one of chlorinated paraffin, dibutyl phthalate or N-ethyl p-toluenesulfonamide or a mixture of several of them.

[0013] In the above technical solution, the composite antifouling agent is any one of mancozeb, ECONEA, copper pyrithione, zinc pyrithione, DCOIT, trichlorophenylmaleimide, thiophanate-methyl or cuprous thiocyanate, or a mixture of several of them.

[0014] In the above technical solution, the thixotropic agent is any one of fumed silica, organic bentonite, silica aerogel or polyamide wax, or a mixture of several of them.

[0015] In the above technical solution, the rosin liquid is a xylene solution of rosin, and the mass ratio of rosin to xylene is 1:1.

[0016] In the above technical solution, the cuprous oxide is electrolytic cuprous oxide with a particle size of less than 2.5 μm.

[0017] In the above technical solution, the filler is any one of zinc oxide, red iron oxide, titanium dioxide, calcium carbonate or barium sulfate, or a mixture of several of them.

[0018] In the above technical solution, the pigment is any one of medium chrome yellow, phthalocyanine blue, phthalocyanine green, permanent red F2RK, iron red, and carbon black, or a mixture of several of them.

[0019] In the above technical solution, the solvent is any one of xylene, n-butanol, isobutanol, cyclohexanone, butyl acetate, isopropanol or isoamyl acetate, or a mixture of several of them.

[0020] A method for preparing a one-component self-polishing antifouling coating suitable for the surface of a rubber substrate comprises the following steps:

[0021] (I) adding the flexible antifouling resin, toughening resin, toughening agent and rosin solution into a grinding tank in proportion and stirring to disperse them uniformly;

[0022] (II) adding the composite antifouling agent, cuprous oxide, filler and pigment into a grinding tank in proportion and stirring to disperse them uniformly;

[0023] (III) Add the thixotropic agent to the grinding jar, stir evenly, grind and disperse with zirconium beads as grinding particles until the raw material fineness reaches below 80 μm, filter the material, wash the grinding jar with 60% solvent, and adjust the required viscosity with the remaining solvent to obtain a single-component self-polishing antifouling coating.

[0024] In the above technical solution, the rotation speed of the stirring and dispersing in steps (I) and (II) is 1500 r / min to 2500 r / min, and the rotation speed of the grinding and dispersing in step (III) is 2000 r / min to 2500 r / min.

[0025] The beneficial effects of the present invention are:

[0026] The invention provides a one-component self-polishing antifouling coating suitable for the surface of a rubber substrate and a preparation method thereof. The prepared coating adopts a degradable flexible resin as a base material, and is added with a toughening resin and a toughening agent, thereby solving the problems of easy cracking and poor adhesion of the antifouling coating on the flexible substrate, and the antifouling coating can be directly coated on the chlorinated rubber substrate without the need for an intermediate connecting coating. DETAILED DESCRIPTION

[0027] In order to enable persons skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below through specific implementation methods.

[0028] Example 1

[0029] A method for preparing a one-component self-polishing antifouling coating suitable for the surface of a rubber substrate mainly comprises the following preparation steps:

[0030] Weigh a certain amount of rosin solid, add an equal amount of xylene, control the temperature at 90±5℃, stir until the rosin solid is completely dissolved, and obtain rosin liquid for later use;

[0031] Weigh 177.00 g of modified polyurethane (flexible antifouling resin), 22.70 g of chloroether resin (toughening resin), 7.70 g of active epoxy-terminated liquid polysulfide polymer (toughening resin), and 23.10 g of rosin liquid by mass, add them into a grinding tank in sequence, and stir and disperse them evenly at a speed of 1500 r / min;

[0032] Weigh 8.85 g of chlorinated paraffin (toughener, CP70) by mass, add it into a grinding jar, and stir and disperse it evenly at a speed of 2000 r / min;

[0033] Weigh 2.50 g of DCOIT (30%) and 13.25 g of copper pyrithione as a composite antifouling agent, add them into the grinding jar in sequence, and continue to stir and disperse them evenly at a speed of 2000 r / min;

[0034] Weigh 177.00 g of cuprous oxide and 5.00 g of red iron oxide (filler) by mass, add them into a grinding jar, and continue stirring at a speed of 2500 r / min to disperse them evenly;

[0035] Weigh 17.70 g of carbon black (pigment) and 4.40 g of phthalocyanine green (pigment) by mass, add them into the grinding tank in sequence, and continue to stir and disperse them evenly at a speed of 2500 r / min;

[0036] Weigh 2.85 g of organic bentonite (thixotropic agent) by mass, add it into the grinding jar, and continue to stir and disperse it evenly at a speed of 2000 r / min;

[0037] Use zirconium beads as grinding particles, grind and disperse until the raw material fineness reaches below 80μm, filter the material, and use 60% of the total amount of xylene (22.77g) to wash the zirconium beads. The remaining xylene is used to adjust the viscosity. Room temperature (23-25℃) ≥80KU is appropriate. If the viscosity is too low, add a small amount of thixotropic agent (organic bentonite) and disperse at high speed.

[0038] Example 2

[0039] A method for preparing a one-component self-polishing antifouling coating suitable for the surface of a rubber substrate mainly comprises the following preparation steps:

[0040] Weigh a certain amount of rosin solid, add an equal amount of xylene, control the temperature at 90±5℃, stir until the rosin solid is completely dissolved, and obtain rosin liquid for later use;

[0041] Weigh 179.55 g of modified polyurethane (flexible resin), 19.45 g of chloroether resin (toughening resin), 9.45 g of active epoxy-terminated liquid polysulfide polymer (toughening resin), and 21.45 g of rosin liquid by mass, add them into a grinding tank in sequence, and stir and disperse them evenly at a speed of 1500 r / min;

[0042] Weigh 9.75 g of chlorinated paraffin (toughener, CP70) by mass, add them into the grinding jar in sequence, and stir and disperse them evenly at a speed of 2000 r / min;

[0043] Weigh 1.95 g of organic antifouling agent DCOIT (30%) and 14.60 g of copper pyrithione by mass, add them into the grinding jar in sequence, and continue stirring at a speed of 2000 r / min to disperse them evenly;

[0044] Weigh 184.55 g of cuprous oxide and 5.00 g of red iron oxide (filler) by mass, add them into a grinding jar, and continue stirring at a speed of 2500 r / min to disperse them evenly;

[0045] Weigh 19.45 g of carbon black (pigment) and 4.85 g of phthalocyanine green (pigment) by mass, add them into the grinding tank in sequence, and continue stirring at a speed of 2500 r / min to disperse them evenly;

[0046] Weigh 3.10 g of organic bentonite (thixotropic agent) by mass, add it into the grinding jar, and continue to stir and disperse it evenly at a speed of 2500 r / min;

[0047] Use zirconium beads as grinding particles, grind and disperse until the raw material fineness reaches below 80μm, filter the material, and use 60% of the total amount of xylene (16.11g) to wash the zirconium beads. The remaining xylene is used to adjust the viscosity. Room temperature (23-25℃) ≥80KU is appropriate. If the viscosity is too low, add a small amount of thixotropic agent (organic bentonite) and disperse at high speed.

[0048] Example 3

[0049] A method for preparing a one-component self-polishing antifouling coating suitable for the surface of a rubber substrate mainly comprises the following preparation steps:

[0050] Weigh a certain amount of rosin solid, add an equal amount of xylene, control the temperature at 90±5℃, stir until the rosin solid is completely dissolved, and obtain rosin liquid for later use;

[0051] Weigh 184.55 g of modified polyurethane (flexible resin), 15.95 g of chloroether resin (toughening resin), 10.90 g of active epoxy-terminated liquid polysulfide polymer (toughening agent, EPS25), and 21.00 g of rosin liquid, add them into a grinding tank in sequence, and stir and disperse them evenly at a speed of 1500 r / min;

[0052] Weigh 8.85 g of chlorinated paraffin (toughener, CP70) by mass, add it into a grinding jar, and stir and disperse it evenly at a speed of 2000 r / min;

[0053] Weigh 2.50 g of organic antifouling agent DCOIT (30%) and 13.25 g of copper pyrithione by mass, add them into the grinding jar in sequence, and continue stirring at a speed of 2000 r / min to disperse them evenly;

[0054] Weigh 177.00 g of cuprous oxide and 5.00 g of red iron oxide (filler) by mass, add them into a grinding jar, and continue stirring at a speed of 2500 r / min to disperse them evenly;

[0055] Weigh 17.70 g of carbon black (pigment) and 4.40 g of phthalocyanine green (pigment) by mass, add them into the grinding tank in sequence, and continue to stir and disperse them evenly at a speed of 2500 r / min;

[0056] Weigh 2.85 g of organic bentonite (thixotropic agent) by mass, add it into the grinding jar, and continue to stir and disperse it evenly at a speed of 2500 r / min;

[0057] Use zirconium beads as grinding particles, grind and disperse until the raw material fineness reaches below 80μm, filter the material, and use 60% of the total amount of xylene (21.63g) to wash the zirconium beads. The remaining xylene is used to adjust the viscosity. Room temperature (23-25℃) ≥80KU is appropriate. If the viscosity is too low, add a small amount of thixotropic agent (organic bentonite) and disperse at high speed.

[0058] Comparative Example 1 (without adding toughening resin)

[0059] A method for preparing a one-component self-polishing antifouling coating suitable for the surface of a rubber substrate mainly comprises the following preparation steps:

[0060] Weigh a certain amount of rosin solid, add an equal amount of xylene, control the temperature at 90±5℃, stir until the rosin solid is completely dissolved, and obtain rosin liquid for later use;

[0061] Weigh 177.94 g of modified polyurethane (flexible resin) and 53.38 g of rosin solution by mass, add them into the grinding tank in sequence, and stir and disperse them evenly at a speed of 1500 r / min;

[0062] Weigh 4.45 g of chlorinated paraffin (toughener, CP70) by mass, add it into a grinding jar, and stir and disperse it evenly at a speed of 2000 r / min;

[0063] Weigh 1.78 g of organic antifouling agent DCOIT (30%) and 16.01 g of copper pyrithione by mass, add them into the grinding jar in sequence, and continue stirring at a speed of 2000 r / min to disperse them evenly;

[0064] Weigh 177.94 g of cuprous oxide by mass, add it into the grinding jar, and continue stirring at a speed of 2500 r / min to disperse it evenly;

[0065] Weigh 17.79g of zinc oxide and 8.90g of red iron oxide by mass, add them into the grinding tank in sequence, and continue stirring at a speed of 2000r / min to disperse them evenly;

[0066] Weigh 17.79 g of carbon black (pigment) and 4.45 g of phthalocyanine green (pigment) by mass, add them into the grinding tank in sequence, and continue stirring at a speed of 2500 r / min to disperse them evenly;

[0067] Weigh 1.78 g of organic bentonite (thixotropic agent) by mass, add it into the grinding jar, and continue to stir and disperse it evenly at a speed of 2500 r / min;

[0068] Use zirconium beads as grinding particles, grind and disperse until the raw material fineness reaches below 80μm, filter the material, and use 60% of the total amount of xylene (17.79g) to wash the zirconium beads. The remaining xylene is used to adjust the viscosity. Room temperature (23-25℃) ≥80KU is appropriate. If the viscosity is too low, add a small amount of thixotropic agent (organic bentonite) and disperse at high speed.

[0069] Comparative Example 2 (No toughening resin added - active epoxy-terminated liquid polysulfide polymer)

[0070] A method for preparing a one-component self-polishing antifouling coating suitable for the surface of a rubber substrate mainly comprises the following preparation steps:

[0071] Weigh a certain amount of rosin solid, add an equal amount of xylene, control the temperature at 90±5℃, stir until the rosin solid is completely dissolved, and obtain rosin liquid for later use;

[0072] Weigh 177.94 g of modified polyurethane (flexible resin), 44.48 g of chloroether resin (toughening resin), and 26.69 g of rosin solution by mass, add them into a grinding jar in sequence, and stir and disperse them evenly at a speed of 1500 r / min;

[0073] Weigh 4.45 g of chlorinated paraffin (toughener, CP70) by mass, add it into a grinding jar, and stir and disperse it evenly at a speed of 2000 r / min;

[0074] Weigh 1.78 g of organic antifouling agent DCOIT (30%) and 16.01 g of copper pyrithione by mass, add them into the grinding jar in sequence, and continue stirring at a speed of 2000 r / min to disperse them evenly;

[0075] Weigh 177.94 g of cuprous oxide and 8.90 g of red iron oxide by mass, add them into a grinding jar, and continue stirring at a speed of 2500 r / min to disperse them evenly;

[0076] Weigh 17.79 g of carbon black (pigment) and 4.45 g of phthalocyanine green (pigment) by mass, add them into the grinding tank in sequence, and continue stirring at a speed of 2500 r / min to disperse them evenly;

[0077] Weigh 1.78 g of organic bentonite (thixotropic agent) by mass, add it into the grinding jar, and continue to stir and disperse it evenly at a speed of 2500 r / min;

[0078] Use zirconium beads as grinding particles, grind and disperse until the raw material fineness reaches below 80μm, filter the material, and use 60% of the total amount of xylene (17.79g) to wash the zirconium beads. The remaining xylene is used to adjust the viscosity. Room temperature (23-25℃) ≥80KU is appropriate. If the viscosity is too low, add a small amount of thixotropic agent (organic bentonite) and disperse at high speed.

[0079] Comparative Example 3 (without adding toughening resin-chloroether resin)

[0080] A method for preparing a one-component self-polishing antifouling coating suitable for the surface of a rubber substrate mainly comprises the following preparation steps:

[0081] Weigh a certain amount of rosin solid, add an equal amount of xylene, control the temperature at 90±5℃, stir until the rosin solid is completely dissolved, and obtain rosin liquid for later use;

[0082] Weigh 174.83 g of modified polyurethane (flexible resin), 43.71 g of active epoxy-terminated liquid polysulfide polymer (toughening resin), and 34.97 g of rosin liquid by mass, add them into a grinding jar in sequence, and stir and disperse them evenly at a speed of 1500 r / min;

[0083] Weigh 4.37 g of chlorinated paraffin (toughener, CP70) by mass, add it into a grinding jar, and stir and disperse it evenly at a speed of 2000 r / min;

[0084] Weigh 1.75 g of organic antifouling agent DCOIT (30%) and 15.73 g of copper pyrithione by mass, add them into the grinding jar in sequence, and continue stirring at a speed of 2000 r / min to disperse them evenly;

[0085] Weigh 174.83 g of cuprous oxide and 8.74 g of red iron oxide by mass, add them into a grinding jar, and continue stirring at a speed of 2500 r / min to disperse them evenly;

[0086] Weigh 17.48 g of carbon black (pigment) and 4.37 g of phthalocyanine green (pigment) by mass, add them into the grinding tank in sequence, and continue to stir and disperse them evenly at a speed of 2500 r / min;

[0087] Weigh 1.75 g of organic bentonite (thixotropic agent) by mass, add it into the grinding jar, and continue to stir and disperse it evenly at a speed of 2500 r / min;

[0088] Use zirconium beads as grinding particles, grind and disperse until the raw material fineness reaches below 80μm, filter the material, and use 60% of the total amount of xylene (17.48g) to wash the zirconium beads. The remaining xylene is used to adjust the viscosity. Room temperature (23-25℃) ≥80KU is appropriate. If the viscosity is too low, add a small amount of thixotropic agent (organic bentonite) and disperse at high speed.

[0089] The performance of the one-component self-polishing antifouling coatings synthesized in Examples 1 to 3 and Comparative Examples 1 to 3 was tested:

[0090] 1. Adhesion test

[0091] Test method: The test substrate is a chloroprene rubber sample with a size of 150 mm × 150 mm × 10 mm. The one-component self-polishing antifouling coating obtained in each embodiment and comparative example is directly sprayed on the sample with a thickness of 100 to 150 μm. After the coating is completely cured, it is cured at room temperature for 7 days. The adhesion test is carried out according to GB / T 9286-1998 "Scratching test for paint and varnish film". The results are shown in Table 1.

[0092] Table 1 Adhesion of each coating

[0093] Adhesion grade Example 1 Level 0 Example 2 Level 0 Example 3 Level 0 Comparative Example 1 Level 3 Comparative Example 2 Level 1 Comparative Example 3 Level 0

[0094] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 1, it can be found that the one-component self-polishing antifouling coating prepared by the present invention has higher adhesion.

[0095] By comparing Examples 1 to 3 with Comparative Examples 1 to 3, it can be found that the addition of chloroether resin and active epoxy-terminated liquid polysulfide polymer can significantly improve the adhesion of the antifouling coating on the rubber substrate, and the active epoxy-terminated liquid polysulfide polymer has a better effect.

[0096] 2. Flexibility Test

[0097] Test method: The test substrate is a chloroprene rubber sample with a size of 150mm×150mm×10mm. The single-component self-polishing antifouling coating obtained in each embodiment and comparative example is directly sprayed on the sample, and the thickness is controlled to be 50-75μm and 100-150μm respectively. After the coating is completely cured, it is cured at room temperature for 7 days. The sample is subjected to a bending test (bending angle ≥90°, bending times ≥10 times) to observe the cracking of the coating. The test results are shown in Table 2.

[0098] Table 2 Flexibility test of each coating

[0099] Cracking condition (50~70μm) Cracking condition (100~150μm) Example 1 Uncracked Uncracked Example 2 Uncracked Uncracked Example 3 Uncracked Uncracked Comparative Example 1 Cracking Cracking Comparative Example 2 Uncracked Uncracked Comparative Example 3 Uncracked Cracking

[0100] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 2, it can be found that the one-component self-polishing antifouling coating prepared by the present invention has good flexibility, and the coating will not crack with the deformation of the rubber.

[0101] By comparing Comparative Example 1 with Comparative Examples 2 to 3, it can be found that the addition of chloroether resin and active epoxy-terminated liquid polysulfide polymer can significantly enhance the flexibility of the coating, and the compounding effect of chloroether resin is better.

[0102] 3. Copper ion leakage rate test

[0103] Test method: The copper ion permeation rate of the coatings prepared in the examples and comparative examples was tested according to GB / T6824-2008 "Determination of copper ion permeation rate of ship bottom antifouling paint". The test results are shown in Table 3.

[0104] Table 3 Copper ion permeation rate of each coating

[0105]

[0106] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 3, it can be found that although the copper ion permeation rate of the one-component self-polishing antifouling coating prepared by the present invention is reduced, its copper ion permeation rate can still meet the antifouling requirements, that is, while improving the adhesion and flexibility of the antifouling coating, it also ensures a certain antifouling performance.

[0107] 4. Antifouling performance test

[0108] Test method: The comprehensive antifouling performance of the coatings prepared in the examples and comparative examples according to GB / T6370-2007 "Shallow sea immersion test method for antifouling paint samples". The shallow sea immersion test was conducted in the waters of Zhoushan, Zhejiang.

[0109] The shallow sea immersion results show that the single-component self-polishing antifouling coating prepared by the present invention has good antifouling performance when used in shallow sea hanging panels for one marine biological peak season without fouling organisms attached to the surface.

[0110] The present invention uses a degradable flexible resin as the base material of the self-polishing antifouling coating, and is supplemented with a certain amount of rosin. Through the degradation of the flexible resin and the hydrolysis of the rosin resin, a stable polishing rate of the antifouling coating during service is ensured; at the same time, a toughening resin and a toughening agent are compounded to further improve the toughness of the coating, and completely solve the problem that the self-polishing antifouling resin is easy to crack on the rubber substrate as the rubber is deformed.

[0111] The present invention not only solves the problem of toughness of the antifouling coating by compounding several resins, but also greatly improves the adhesion of the antifouling coating on the rubber substrate. The coating can be directly coated on substrates such as chloroprene rubber without the need for pre-coating of connecting paint, thereby simplifying the matching and improving the convenience of construction.

[0112] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A one-component self-polishing antifouling coating suitable for the surface of a rubber substrate, characterized in that: The components contained in the antifouling coating and the mass percentage of each component are:

2. The one-component self-polishing antifouling coating suitable for the surface of a rubber substrate according to claim 1, characterized in that: The flexible antifouling resin is a soft segment polyurethane resin; the soft segment polyurethane resin is polyethylene adipate, polybutylene adipate or polyhexane adipate.

3. The one-component self-polishing antifouling coating suitable for the surface of a rubber substrate according to claim 1, characterized in that: The toughening resin is any one of chloroether resin and multi-active epoxy terminal sulfur polymer or a mixture of the two.

4. The one-component self-polishing antifouling coating suitable for the surface of a rubber substrate according to claim 1, characterized in that: The toughening agent is any one of chlorinated paraffin, dibutyl phthalate or N-ethyl p-toluenesulfonamide or a mixture of several of them.

5. The one-component self-polishing antifouling coating suitable for the surface of a rubber substrate according to claim 1, characterized in that: The composite antifouling agent is any one of mancozeb, ECONEA, copper pyrithione, zinc pyrithione, DCOIT, trichlorophenylmaleimide, thiophanate-methyl or cuprous thiocyanate, or a mixture of several of them.

6. The one-component self-polishing antifouling coating suitable for the surface of a rubber substrate according to claim 1, characterized in that: The thixotropic agent is any one of fumed silica, organic bentonite, silica aerogel or polyamide wax or a mixture of several of them.

7. The one-component self-polishing antifouling coating suitable for the surface of a rubber substrate according to claim 1, characterized in that: The rosin liquid is a xylene solution of rosin, and the mass ratio of rosin to xylene is 1:1; the cuprous oxide is an electrolytic cuprous oxide with a particle size of less than 2.5 μm.

8. The one-component self-polishing antifouling coating suitable for the surface of a rubber substrate according to claim 1, characterized in that: The filler is any one of zinc oxide, red iron oxide, titanium dioxide, calcium carbonate or barium sulfate or a mixture of several thereof; the pigment is any one of medium chrome yellow, phthalocyanine blue, phthalocyanine green, permanent red F2RK, iron red and carbon black or a mixture of several thereof; the solvent is any one of xylene, n-butanol, isobutanol, cyclohexanone, butyl acetate, isopropanol or isoamyl acetate or a mixture of several thereof.

9. A method for preparing a one-component self-polishing antifouling coating suitable for the surface of a rubber substrate according to any one of claims 1 to 8, characterized in that: The following steps are involved: (I) adding the flexible antifouling resin, toughening resin, rosin solution and toughening agent into a grinding tank in proportion and stirring to disperse them uniformly; (II) adding the composite antifouling agent, cuprous oxide, filler and pigment into a grinding tank in proportion and stirring to disperse them uniformly; (III) Add the thixotropic agent to the grinding jar, stir evenly, grind and disperse with zirconium beads as grinding particles until the raw material fineness reaches below 80 μm, filter the material, wash the grinding jar with 60% solvent, and adjust the required viscosity with the remaining solvent to obtain a single-component self-polishing antifouling coating.

10. The method for preparing a one-component self-polishing antifouling coating suitable for the surface of a rubber substrate according to claim 9, characterized in that: The stirring and dispersing speed in steps (I) and (II) is 1500 r / min to 2500 r / min, and the grinding and dispersing speed in step (III) is 2000 r / min to 2500 r / min.

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