Rosin modified zinc acrylate self-polishing resin, antifouling paint with resin and synthesis method

Abstract

The invention discloses rosin modified zinc acrylate self-polishing resin, an antifouling paint containing the resin and a synthesis method. Firstly, under the action of an initiator, an acrylic prepolymer is synthesized from an acrylic monomer through a polymerization reaction; then, under the action of zinc oxide and benzoic acid, rosin resin is grafted to the side chain of the acrylic prepolymer, and zinc acrylate resin with the side chain containing rosin is obtained; and mixing, dispersing and grinding the rosin modified zinc acrylate resin, an anti-fouling agent, pigment filler, an auxiliary agent and a solvent to obtain the self-polishing anti-fouling paint based on the rosin modified zinc acrylate resin. The prepared rosin modified zinc acrylate self-polishing resin is high in polymerization degree, concentrated in molecular weight distribution and good in plasticity and flexibility, and the self-polishing antifouling paint based on the rosin modified zinc acrylate self-polishing resin comprises a cuprous oxide main antifouling agent and a composite organic antifouling agent and has the stable copper ion seepage rate and the good antifouling effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and particularly relates to a rosin-modified zinc acrylate self-polishing resin, an antifouling coating having the resin, and a synthesis method thereof. Background Art

[0002] Marine biofouling has always been a major problem in maritime navigation. Fouling organisms will increase the frictional resistance of the hull, accelerate the corrosion of the hull, and even cause pipeline blockage and leakage, seriously affecting the hull life and navigation performance. Antifouling coatings are considered to be the most effective method to solve the problem of marine fouling at present. At present, acrylic antifouling coatings dominate the market. The acrylic coating market is growing continuously, and the compound annual growth rate from 2023 to 2028 is expected to be 4.65%. As an important segment of the market, antifouling coatings also show a good growth trend.

[0003] Zinc acrylate-based self-polishing antifouling coatings have an antifouling period of 2-5 years, do not contain heavy metal ions, and have a stable coating polishing rate, which has been widely studied. Generally, in order to improve the polishing rate of the antifouling paint film, accelerate the "self-renewal" speed of the paint film surface, and thus improve the antifouling performance, a certain amount of rosin resin is added to the self-polishing antifouling paint formula. However, due to the solubility of rosin resin in seawater, the rapid dissolution of the surface rosin resin in the early stage of the antifouling paint service leads to an excessive exudation of cuprous oxide. Summary of the Invention

[0004] The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a rosin-modified zinc acrylate self-polishing resin, an antifouling coating having the resin, and a synthesis method thereof.

[0005] The present invention is achieved by the following technical solutions:

[0006] A synthesis method of a rosin-modified zinc acrylate self-polishing resin, comprising the following steps:

[0007] (Ⅰ) Preparation of acrylic prepolymer

[0008] Under the action of an initiator, acrylic monomers are synthesized into an acrylic prepolymer through a polymerization reaction;

[0009] (Ⅱ) Synthesis of rosin-modified zinc acrylate resin

[0010] Under the action of zinc oxide and benzoic acid, rosin resin is grafted onto the side chain of the acrylic prepolymer to obtain a zinc acrylate resin with rosin in the side chain, that is, a rosin-modified zinc acrylate self-polishing resin.

[0011] In the above technical solution, the initiator is azobisisobutyronitrile or azobisvaleronitrile.

[0012] In the above technical solution, the acrylic monomer is methyl methacrylate (MMA), ethyl acrylate (EA), methacrylic acid (MAA), 2-hydroxyethyl methacrylate (HEMA), and acrylic resin (AA).

[0013] In the above technical solution, the specific method for preparing the acrylic prepolymer in step (Ⅰ) is as follows:

[0014] (ⅰ) Weigh 20 parts to 30 parts of xylene and 60 parts to 90 parts of benzoic acid, add them into a four-necked flask equipped with a stirrer, a condenser, a thermometer, and a constant-pressure dropping funnel, and heat to 100 °C while stirring to obtain reaction solution A;

[0015] (ⅱ) Weigh 20 parts to 30 parts of methyl methacrylate (MMA), 150 parts to 200 parts of ethyl acrylate (EA), 5 parts to 10 parts of 2-hydroxyethyl methacrylate (HEMA), 5 parts to 10 parts of methacrylic acid (MAA), 1 part to 5 parts of acrylic acid (AA), and 3 parts to 5 parts of initiator, mix and stir evenly to obtain reaction solution B;

[0016] (ⅲ) Slowly add reaction solution B dropwise to reaction solution A at a uniform speed over 3 h, and keep the temperature for 2 h to obtain the acrylic prepolymer.

[0017] In the above technical solution, the specific method for synthesizing the rosin-modified zinc acrylate resin in step (Ⅱ) is as follows:

[0018] (ⅰ) Weigh 80 parts to 120 parts of rosin solution, 15 parts to 20 parts of benzoic acid, and 10 parts to 20 parts of zinc oxide, mix and stir evenly in a beaker, and heat in an 80 °C oven for 1 h to obtain reaction solution C,

[0019] (ⅱ) Add reaction solution C to the acrylic prepolymer prepared in step (Ⅰ), raise the reaction temperature to 110 °C, and keep the temperature at 110 °C for 3 h to obtain the rosin-modified zinc acrylate resin.

[0020] In the above technical solution, the rosin solution is composed of rosin and xylene mixed in a mass ratio of 1:1.

[0021] A rosin-modified zinc acrylate self-polishing resin is prepared by the foregoing method.

[0022] A self-polishing antifouling coating based on the rosin-modified zinc acrylate self-polishing resin, the self-polishing antifouling coating includes the following components and the weight parts of each component are as follows:

[0023]

[0024] In the above technical solution, the antifouling agent includes an organic antifouling agent and an inorganic antifouling agent; the organic antifouling agent is any one or more of copper pyrithione, copper pyrithione, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, 2-tert-butylamino-4-cyclopropylamino-6-methylthio-s-triazine, zinc ethylenebisdithiocarbamate, 4-bromo-2-(4-chlorophenyl)-5-trifluoromethylpyrrole-3-carbonitrile, N-(2,4,6-trichlorophenyl) maleimide, pyridine triphenylborane or capsaicin; the inorganic antifouling agent is a copper-based antifouling agent, and the copper-based antifouling agent is any one or more of copper, copper alloy, cuprous oxide or copper thiocyanate.

[0025] In the above technical solution, the pigment and filler include a pigment and a filler, the pigment is any one or more of titanium dioxide, iron oxide red, zinc oxide, iron oxide black; the filler is any one or more of talc powder, calcium carbonate, precipitated barium sulfate, barite, silica stone, mica powder, kaolin, barium carbonate, magnesium silicate or diatomaceous earth.

[0026] In the above technical solution, the additives include a plasticizer and an anti-settling thixotropic agent, the plasticizer is any one or more of chlorinated paraffin, dibutyl phthalate, dioctyl phthalate, epoxy fatty acid ester, epoxy soybean oil, dimethyl lauramide, sodium stearate, polyvinyl acetate butyrate or polyester type polyurethane; the anti-settling thixotropic agent is any one or more of fumed silica, organic bentonite, polyamide wax or hydrogenated castor oil.

[0027] In the above technical solution, the solvent is any one or more of toluene, xylene, n-butanol, n-hexane or n-heptane.

[0028] A preparation method of a self-polishing antifouling coating based on rosin-modified zinc acrylate self-polishing resin, specifically: mixing rosin-modified zinc acrylate resin with an antifouling agent, a pigment and filler, additives, and a solvent, dispersing at high speed and grinding to a fineness ≤ 80 μm to prepare a self-polishing antifouling coating based on rosin-modified zinc acrylate resin.

[0029] The beneficial effects of the present invention are:

[0030] The present invention provides a rosin-modified zinc acrylate self-polishing resin, an antifouling coating having the resin, and a synthesis method. Compared with the antifouling coating of conventional zinc acrylate resin which has poor mechanical properties and often requires adding a plasticizer to the formulation to improve the toughness of the antifouling coating and enhance its mechanical properties, for the rosin-modified zinc acrylate resin prepared in the present invention, the rosin resin in the acrylic side chain increases the distance between polymer macromolecules and reduces the interaction force between molecular chains, thereby improving the toughness of the coating and playing the role of internal plasticization, providing good mechanical properties for the antifouling coating; compared with the conventional self-polishing antifouling coating directly adding rosin to the formulation, the self-polishing antifouling coating prepared in the present invention can overcome the problems of too fast initial polishing rate and excessive copper ion leaching of the antifouling coating, and achieve a stable polishing rate and copper ion leaching rate of the antifouling coating; Specific Embodiments

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below through specific embodiments.

[0032] Example 1

[0033] A self-polishing antifouling coating based on rosin-modified zinc acrylate self-polishing resin, specifically:

[0034] (Ⅰ) Preparation of acrylic prepolymer

[0035] Weigh 20 parts by mass of xylene and 60 parts by mass of benzoic acid, add them to a four-necked flask equipped with a stirrer, a condenser, a thermometer and a constant-pressure dropping funnel, heat to 100 °C while stirring to obtain reaction liquid A;

[0036] Weigh 22 parts by mass of methyl methacrylate, 165 parts by mass of ethyl acrylate, 6 parts by mass of 2-hydroxyethyl methacrylate, 5.5 parts by mass of methacrylic acid, 1.5 parts by mass of acrylic acid, and 3.5 parts by mass of initiator, mix and stir evenly to obtain reaction liquid B;

[0037] Drop reaction liquid B into reaction liquid A at a uniform speed over 3 h, and keep warm for 2 h to obtain an acrylic prepolymer;

[0038] (Ⅱ) Synthesis of rosin-modified zinc acrylate resin

[0039] Weigh 97 parts by mass of rosin solution (rosin:xylene = 1:1), 20 parts by mass of benzoic acid, and 19 parts by mass of zinc oxide, mix and stir evenly in a beaker, heat in an 80 °C oven for 1 h to obtain reaction liquid C, add reaction liquid C to the above four-necked flask (acrylic prepolymer), and raise the reaction temperature to 110 °C, keep warm at 110 °C for 3 h to obtain rosin-modified zinc acrylate resin;

[0040] (III) Synthesis of self-polishing antifouling coatings based on rosin-modified zinc acrylate resin

[0041] Mix 25 parts by mass of rosin-modified zinc acrylate resin, 40 parts by mass of cuprous oxide, 7 parts by mass of copper pyrithione, 10 parts by mass of zinc oxide, 6 parts by mass of iron oxide red, 5 parts by mass of talc powder, 3 parts by mass of organic bentonite, 1 part by mass of polyamide wax and 10 parts by mass of xylene, disperse and grind at high speed until the fineness is ≤ 80 μm to prepare a self-polishing antifouling coating based on rosin-modified zinc acrylate resin.

[0042] Example 2

[0043] A self-polishing antifouling coating based on rosin-modified zinc acrylate self-polishing resin, specifically:[[]]

[0044] (I) Preparation of acrylic prepolymer

[0045] The same as in Example 1;

[0046] (II) Synthesis of rosin-modified zinc acrylate resin

[0047] The same as in Example 1;

[0048] (III) Synthesis of self-polishing antifouling coatings based on rosin-modified zinc acrylate resin

[0049] Mix 25 parts by mass of rosin-modified zinc acrylate resin, 20 parts by mass of cuprous oxide, 7 parts by mass of copper pyrithione, 15 parts by mass of zinc oxide, 10 parts by mass of iron oxide red, 15 parts by mass of talc powder, 3 parts by mass of organic bentonite, 1 part by mass of polyamide wax and 10 parts by mass of xylene, disperse and grind at high speed until the fineness is ≤ 80 μm to prepare a self-polishing antifouling coating based on rosin-modified zinc acrylate resin.

[0050] Example 3

[0051] A self-polishing antifouling coating based on rosin-modified zinc acrylate self-polishing resin, specifically:[[]]

[0052] (I) Preparation of acrylic prepolymer

[0053] The same as in Example 1;

[0054] (II) Synthesis of rosin-modified zinc acrylate resin

[0055] The same as in Example 1;

[0056] (III) Synthesis of self-polishing antifouling coatings based on rosin-modified zinc acrylate resin

[0057] Mix 25 parts by mass of rosin-modified zinc acrylate resin, 40 parts by mass of cuprous oxide, 7 parts by mass of copper pyrithione, 10 parts by mass of zinc oxide, 6 parts by mass of iron oxide red, 5 parts by mass of talcum powder, 3 parts by mass of organobentonite, 1 part by mass of polyamide wax, 5 parts by mass of chlorinated paraffin, and 10 parts by mass of xylene, disperse at high speed and grind to a fineness ≤ 80 μm to prepare a self-polishing antifouling coating based on rosin-modified zinc acrylate resin.

[0058] Comparative Example 1

[0059] A self-polishing antifouling coating based on zinc acrylate self-polishing resin, specifically:

[0060] (Ⅰ) Prepare acrylic prepolymer

[0061] The same as in Example 1;

[0062] (Ⅱ) Synthesize zinc acrylate resin

[0063] Weigh 20 parts by mass of benzoic acid and 20 parts by mass of zinc oxide, mix and stir evenly in a beaker, heat in an oven at 80 °C for 1 h to obtain reaction liquid C. Add reaction liquid C to the above four-necked flask (acrylic prepolymer), and raise the reaction temperature to 110 °C, keep it warm at 110 °C for 3 h to obtain zinc acrylate resin;

[0064] (Ⅲ) Synthesize a self-polishing antifouling coating based on zinc acrylate resin

[0065] Mix 25 parts by mass of zinc acrylate resin, 40 parts by mass of cuprous oxide, 8 parts by mass of rosin, 7 parts by mass of copper pyrithione, 10 parts by mass of zinc oxide, 6 parts by mass of iron oxide red, 5 parts by mass of talcum powder, 3 parts by mass of organobentonite, 1 part by mass of polyamide wax, 5 parts by mass of chlorinated paraffin, and 10 parts by mass of xylene, disperse at high speed and grind to a fineness ≤ 80 μm to prepare a self-polishing antifouling coating based on rosin-modified zinc acrylate resin.

[0066] Comparative Example 2

[0067] A self-polishing antifouling coating based on zinc acrylate self-polishing resin, specifically:

[0068] (Ⅰ) Prepare acrylic prepolymer

[0069] The same as in Example 1;

[0070] (Ⅱ) Synthesize rosin-modified zinc acrylate resin

[0071] The same as in Comparative Example 1;

[0072] (Ⅲ) Synthesize a self-polishing antifouling coating based on rosin-modified zinc acrylate resin

[0073] Mix 25 parts by mass of zinc acrylate resin, 40 parts by mass of cuprous oxide, 7 parts by mass of copper pyrithione, 10 parts by mass of zinc oxide, 6 parts by mass of iron oxide red, 5 parts by mass of talc powder, 3 parts by mass of organic bentonite, 1 part by mass of polyamide wax and 10 parts by mass of xylene, disperse and grind at high speed until the fineness is ≤80 μm to prepare a self-polishing antifouling coating based on rosin-modified zinc acrylate resin.

[0074] Perform performance tests on the self-polishing antifouling coatings synthesized in the examples and comparative examples:

[0075] I. Impact resistance test

[0076] Test method: Use a coating film impact tester, refer to the standard specification of "GB / T1732-2020 Determination method for impact resistance of paint films", the sample is a 1mm tinplate, the coating thickness is 25±5μm, and the drop hammer height is 50cm to conduct an impact resistance test on the paint film. The test results are shown in Table 1.

[0077] II. Flexural resistance test

[0078] Refer to the ASTM D522 / D522M paint film bending test standard, the sample is a 1mm tinplate, the coating thickness is 25±5μm, bend the tinplate coated with the paint film around cylindrical mandrels with different diameters, and observe whether the paint film cracks or peels off from the substrate to evaluate the flexibility of the coating. The test results are shown in Table 1.

[0079] Table 1 Test results of impact resistance and flexural resistance

[0080] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Impact resistance Passed Passed Passed Passed Failed Flexural resistance Cracked Cracked Not cracked Slightly cracked Detached

[0081] Compare the test results of Examples 1-3 and Comparative Examples 1-2. Examples 1 and 2 use rosin-modified zinc acrylate resin, and Example 3 uses rosin-modified zinc acrylate resin and adds a plasticizer (chlorinated paraffin). Examples 1-3 all passed the impact resistance test. Cracking occurred in Examples 1 and 2 during the flexural resistance test, while no cracking or peeling occurred in Example 3; in Comparative Examples 1 and 2, unmodified zinc acrylate resin was used, and a plasticizer was added in Comparative Example 1, which passed the impact resistance test, and slight cracking occurred in the flexural resistance test. No plasticizer was added in Comparative Example 2, the coating did not pass the impact resistance test, and coating peeling occurred in the flexural resistance test. The comparison results show that rosin-modified zinc acrylate resin can provide an internal plasticization effect and improve the toughness of the coating.

[0082] III. Copper ion leaching rate test

[0083] The copper ion leaching rate was tested with reference to the national standard "GB / T 6824-2008 Determination Method for Copper Ion Leaching Rate of Antifouling Paint for Ship Bottom". The test cylinders coated with antifouling paint were immersed in a storage tank filled with artificial seawater. At certain time intervals, each test cylinder was transferred to an independent leaching rate test container filled with the same artificial seawater for rotation, and then put back into the storage tank after rotation. Then, the leachate in the leaching rate test container was taken and analyzed by atomic absorption spectrometry to obtain the concentration of copper ions in the leachate, and the copper ion leaching rate of the antifouling paint for ship bottom was calculated. The cumulative leaching rates of the samples in the examples and comparative examples were tested for 14 days and 45 days, and the test results are shown in Table 2.

[0084] Table 2 Test Results of Copper Ion Leaching Rate

[0085]

[0086] In Examples 1-3, rosin-modified zinc acrylate resin was used, and the cuprous oxide contents were 37.38%, 18.83%, and 35.71% respectively. In Comparative Example 1, zinc acrylate resin was used and rosin was added, and the cuprous oxide content was 33.33%. In Comparative Example 2, zinc acrylate resin was used, and the cuprous oxide content was 37.38%. Comparing the copper ion leaching rates of Examples 1 and 3, it was significantly less than those of Comparative Examples 1 and 2, indicating that rosin-modified zinc acrylate resin can effectively control the leaching of copper ions and prevent the problem of excessive copper ion leaching. The cuprous oxide content in Example 1 was significantly greater than that in Example 2, but the test results of their copper ion leaching rates were not much different, which also indicated that rosin-modified zinc acrylate resin can effectively control the leaching of copper ions and is expected to reduce the usage amount of cuprous oxide in the antifouling coating, thereby reducing the coating cost. The cuprous oxide content in Comparative Example 1 was less than that in Comparative Example 2, but its copper ion leaching rate was significantly greater than that in Comparative Example 2, indicating that directly adding rosin to the coating will accelerate the leaching of copper ions.

[0087] IV. Shallow Sea Immersion Test

[0088] The test was carried out with reference to the standard "GBT5370-2007 Test Method for Shallow Sea Immersion of Antifouling Paint Samples". The immersion test was carried out in the waters of Zhoushan, Zhejiang, and the test period was one peak season of marine organisms.

[0089] The test results showed that: after one peak season of marine organisms, no fouling organisms adhered to the samples of Examples 1-3 and Comparative Examples 1-2, showing good antifouling performance. Comparing the test results, it can be known that the rosin-modified zinc acrylate resin provided by the present invention can effectively control the release of cuprous oxide in the antifouling coating, and even if the content of cuprous oxide is reduced, the antifouling performance can be guaranteed to a certain extent.

[0090] In the present invention, rosin resin is grafted onto zinc acrylate self-polishing resin in the form of a side chain. On the one hand, it can overcome the problems of fast polishing rate and excessive copper ion leaching caused by direct addition, and achieve the "slow release" of copper ions. On the other hand, the incorporation of rosin resin can also play an internal plasticization role, increasing the distance between polymer macromolecules, reducing the interaction force between molecular chains, thereby increasing plasticity and being beneficial to improving the mechanical properties of the antifouling coating.

[0091] The applicant declares that the above description is only the specific implementation manner 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 fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A method for synthesizing rosin-modified zinc acrylate self-polishing resin, characterized in that: The following steps are involved: (I) Preparation of acrylic acid prepolymer Under the action of an initiator, acrylic acid monomers are synthesized into acrylic acid prepolymers through polymerization reaction; (Ⅱ) Synthesis of rosin-modified zinc acrylate resin Under the action of zinc oxide and benzoic acid, rosin resin is grafted onto the side chain of acrylic prepolymer to obtain zinc acrylate resin containing rosin in the side chain, namely, rosin-modified zinc acrylate self-polishing resin.

2. The rosin-modified zinc acrylate self-polishing resin according to claim 1, characterized in that: The initiator is azobisisobutyronitrile or azobisisovaleronitrile.

3. The rosin-modified zinc acrylate self-polishing resin according to claim 1, characterized in that: The acrylic monomers are methyl methacrylate, ethyl acrylate, methacrylic acid, hydroxyethyl methacrylate and acrylic resin.

4. The rosin-modified zinc acrylate self-polishing resin according to claim 1, characterized in that: The specific method for preparing the acrylic acid prepolymer in step (I) is: (i) Weigh 20 to 30 parts of xylene and 60 to 90 parts of benzoic acid, add them into a four-necked flask equipped with a stirrer, a condenser, a thermometer and a constant pressure dropping funnel, and heat to 100° C. while stirring to obtain a reaction solution A; (ii) weighing 20 to 30 parts of methyl methacrylate, 150 to 200 parts of ethyl acrylate, 5 to 10 parts of hydroxyethyl methacrylate, 5 to 10 parts of methacrylic acid, 1 to 5 parts of acrylic acid and 3 to 5 parts of an initiator, mixing and stirring to obtain a reaction solution B; (iii) Add reaction solution B to reaction solution A at a constant rate over 3 hours, and keep warm for 2 hours to obtain an acrylic acid prepolymer.

5. The rosin-modified zinc acrylate self-polishing resin according to claim 1, characterized in that: The specific method of synthesizing the rosin-modified zinc acrylate resin in step (II) is as follows: (i) Weigh 80 to 120 parts of rosin liquid, 15 to 20 parts of benzoic acid, and 10 to 20 parts of zinc oxide, mix and stir them evenly in a beaker, and heat them in an oven at 80° C. for 1 hour to obtain a reaction solution C. (ii) adding the reaction solution C to the acrylic prepolymer prepared in step (I), raising the reaction temperature to 110° C., and maintaining the temperature at 110° C. for 3 hours to obtain a rosin-modified zinc acrylate resin.

6. The rosin-modified zinc acrylate self-polishing resin according to claim 5, characterized in that: The rosin liquid is prepared by mixing rosin and xylene in a mass ratio of 1:

1.

7. A rosin-modified zinc acrylate self-polishing resin, characterized in that: Prepared by the method according to any one of claims 1 to 6.

8. A self-polishing antifouling coating based on the rosin-modified zinc acrylate self-polishing resin according to claim 7, characterized in that: The components included in the self-polishing antifouling coating and the weight portions of each component are as follows:

9. The self-polishing antifouling coating based on rosin-modified zinc acrylate self-polishing resin according to claim 8, characterized in that: The antifouling agent includes an organic antifouling agent and an inorganic antifouling agent; the organic antifouling agent is any one or more of pyridinethione copper, pyridinethione copper, 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one, 2-tert-butylamino-4-cyclopropylamino-6-methylthio-s-triazine, ethylenebisdithiocarbamate zinc, 4-bromo-2-(4-chlorophenyl)-5-trifluoromethylpyrrole-3-carbonitrile, N-(2,4,6-trichlorophenyl)maleimide, pyridinetriphenylborane or capsaicin; the inorganic antifouling agent is a copper-based antifouling agent, and the copper-based antifouling agent is any one or more of copper, copper alloy, cuprous oxide or cuprous thiocyanate; The color filler includes a pigment and a filler, wherein the pigment is any one or more of titanium dioxide, red iron oxide, zinc oxide, and black iron oxide; the filler is any one or more of talc, calcium carbonate, precipitated barium sulfate, barite, silica microstone, mica powder, kaolin, barium carbonate, magnesium silicate, or diatomaceous earth; The auxiliary agent includes a plasticizer and an anti-settling thixotropic agent, wherein the plasticizer is any one or more of chlorinated paraffin, dibutyl phthalate, dioctyl phthalate, epoxy fatty acid ester, epoxy soybean oil, dimethyl lauramide, sodium stearate, polybutyl acetate or polyester polyurethane; the anti-settling thixotropic agent is any one or more of fumed silica, organic bentonite, polyamide wax or hydrogenated castor oil; The solvent is any one or more of toluene, xylene, n-butanol, n-hexane or n-heptane.

10. A method for preparing a self-polishing antifouling coating based on rosin-modified zinc acrylate self-polishing resin according to claim 9, characterized in that: Specifically, rosin-modified zinc acrylate resin is mixed with antifouling agent, pigment, filler, additive and solvent, dispersed and ground at high speed to obtain self-polishing antifouling coating based on rosin-modified zinc acrylate resin.

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