阅读说明：本技术 一种低表面能水性自抛光乳液及其制备方法和低表面能水性自抛光减阻防污涂料 (low-surface-energy water-based self-polishing emulsion, preparation method thereof and low-surface-energy water-based self-polishing anti-drag antifouling paint ) 是由 周峰 裴小维 杨武芳 张建斌 于 2019-11-13 设计创作，主要内容包括：本发明提供了一种低表面能水性自抛光乳液及其制备方法和低表面能水性自抛光减阻防污涂料,属于海洋防污涂料技术领域。本发明提供的低表面能水性自抛光乳液,包括如下质量百分含量的制备原料：含氟丙烯酸酯单体5～15％,丙烯酸硅酯类单体10～20％、丙烯酸酯单体20～30％、丙烯酸0.5～1.5％、乳化剂1～2％、引发剂0.3～0.6％、碳酸氢钠0.05～0.1％、pH调节剂0.3～0.5％,余量为水。本发明提供的低表面能水性自抛光乳液完全是水性的,环境友好,稳定性优异,以其作为成膜物质制备的低表面能水性自抛光减阻防污涂料水下减阻效果明显,防污性能优异。(The invention provides low-surface-energy water-based self-polishing emulsion, a preparation method thereof and a low-surface-energy water-based self-polishing anti-drag antifouling paint, and belongs to the technical field of marine antifouling paints.)

1, kinds of low surface energy aqueous self-polishing emulsion, which is characterized by comprising the following preparation raw materials by mass percent:

5-15% of fluorine-containing acrylate monomer, 10-20% of acrylic silicon ester monomer, 20-30% of acrylate monomer, 0.5-1.5% of acrylic acid, 1-2% of emulsifier, 0.3-0.6% of initiator, 0.05-0.1% of sodium bicarbonate, 0.3-0.5% of pH regulator and the balance of water.

2. The low surface energy aqueous self-polishing emulsion of claim 1 wherein the fluorine-containing acrylate monomer comprises or more of dodecafluoroheptyl methacrylate, tridecafluoroctyl acrylate, and octafluoropentyl acrylate;

the acrylic silicon ester monomer comprises triisopropyl methacrylate silicon ester and/or triisopropyl acrylate silicon ester;

the acrylate monomer comprises or more of methyl methacrylate, butyl acrylate, hydroxyethyl methacrylate and isobornyl methacrylate.

3. The low surface energy aqueous self-polishing emulsion of claim 1, wherein the initiator comprises a persulfate-based initiator;

the emulsifier comprises at least of anionic emulsifier, cationic emulsifier and nonionic emulsifier;

the pH regulator comprises ammonia water, and the mass concentration of the ammonia water is 25-28%.

4. The low surface energy aqueous self-polishing emulsion of any one of claims 1-3- , wherein the pH of the low surface energy aqueous self-polishing emulsion is 6-8;

the average particle size of latex particles in the low-surface-energy aqueous self-polishing emulsion is 150-200 nm.

5. The method of preparing the low surface energy aqueous self-polishing emulsion of any one of claims 1-4 and , comprising the steps of:

mixing a fluorine-containing acrylate monomer, an acrylic silicon ester monomer, an acrylate monomer, acrylic acid, an emulsifier and th water, and emulsifying to obtain a monomer emulsion;

dissolving an initiator in the second part of water to obtain an initiator aqueous solution;

stirring and mixing sodium bicarbonate, residual water, part of monomer emulsion and part of initiator aqueous solution, heating to 80-81 ℃, keeping the temperature, and continuously stirring for 50-100 min to obtain seed emulsion;

dropwise adding the residual monomer emulsion and the residual initiator aqueous solution into the seed emulsion at the temperature of 80-81 ℃, preserving heat for 50-70 min after dropwise adding, heating to 87-89 ℃, preserving heat for 50-70 min, then cooling to 50-55 ℃, and adding a pH regulator into the obtained system to obtain the low-surface-energy aqueous self-polishing emulsion.

6. The preparation method according to claim 5, characterized in that the th water accounts for 10-15% of the total amount of water, and the mass concentration of the initiator aqueous solution is 5-10%;

the part of the monomer emulsion accounts for 25-35% of the total amount of the monomer emulsion;

the part of the initiator aqueous solution accounts for 12-18% of the total amount of the initiator aqueous solution.

7, kinds of low surface energy waterborne self-polishing anti-drag antifouling paint, which is characterized by comprising the following preparation raw materials by mass percent:

25-40% of the low-surface-energy aqueous self-polishing emulsion of any in claims 1-4 or the low-surface-energy aqueous self-polishing emulsion prepared by the preparation method of claim 5 or 6, 5-15% of rosin emulsion, 30-60% of aqueous slurry, 1-3% of an auxiliary agent and the balance of water.

8. The low surface energy aqueous self-polishing anti-drag antifouling paint as claimed in claim 7, wherein the rosin emulsion is prepared from the following raw materials in parts by weight:

35-45 parts of rosin, 8-12 parts of a special rosin emulsifier and 45-55 parts of water.

9. The low-surface-energy aqueous self-polishing anti-drag and anti-fouling paint as claimed in claim 7, wherein the aqueous slurry comprises the following raw materials by mass percent:

40-60% of an antifouling agent, 8-15% of a pigment filler, 0.5-1% of a thickening agent, 0.5-1% of a water-based wetting dispersant and the balance of water.

10. The low surface energy aqueous self-polishing, drag-reducing and antifouling paint as claimed in claim 7, wherein the auxiliary agent comprises an aqueous leveling agent, an aqueous defoaming agent and an antifreezing agent, and the mass ratio of the aqueous leveling agent, the aqueous defoaming agent and the antifreezing agent is 1: (1-2): (2-4).

Technical Field

The invention relates to the technical field of marine antifouling paints, in particular to low-surface-energy aqueous self-polishing emulsion, a preparation method thereof and a low-surface-energy aqueous self-polishing anti-drag antifouling paint.

Background

In the running process of surface ships and underwater vehicles, the surface ships and underwater vehicles face the requirements of resistance reduction and marine organism pollution prevention. Brushing anti-drag and anti-fouling paint is an effective means for meeting the above requirements. But the existing paint mainly takes low-surface-energy antifouling paint as a main material, has short antifouling period, particularly poor static antifouling performance, is basically solvent-based, has high VOC content, and can be added with organic solvent as thinner in the coating process, thereby releasing a large amount of organic volatile matters, polluting the environment and harming the health of constructors. Therefore, the development of waterborne long-acting anti-drag and anti-fouling paint is a development trend.

aqueous antifouling coatings with low surface energy are reported at present, but the problems of too short antifouling period and poor static antifouling performance still exist.

Disclosure of Invention

The invention aims to provide low-surface-energy aqueous self-polishing emulsions, a preparation method thereof and a low-surface-energy aqueous self-polishing anti-drag antifouling paint.

In order to achieve the above object, the present invention provides the following technical solutions:

the invention provides low-surface-energy water-based self-polishing emulsions, which comprise the following preparation raw materials in percentage by mass:

5-15% of fluorine-containing acrylate monomer, 10-20% of acrylic silicon ester monomer, 20-30% of acrylate monomer, 0.5-1.5% of acrylic acid, 1-2% of emulsifier, 0.3-0.6% of initiator, 0.05-0.1% of sodium bicarbonate, 0.3-0.5% of pH regulator and the balance of water.

Preferably, the fluorine-containing acrylate monomer comprises or more of dodecafluoroheptyl methacrylate, tridecafluorooctyl acrylate and octafluoropentyl acrylate;

the acrylic silicon ester monomer comprises triisopropyl methacrylate silicon ester and/or triisopropyl acrylate silicon ester;

the acrylate monomer comprises or more of methyl methacrylate, butyl acrylate, hydroxyethyl methacrylate and isobornyl methacrylate.

Preferably, the initiator comprises a persulfate-based initiator;

the emulsifier comprises at least of anionic emulsifier, cationic emulsifier and nonionic emulsifier;

the pH regulator comprises ammonia water, and the mass concentration of the ammonia water is 25-28%.

Preferably, the pH value of the low-surface-energy aqueous self-polishing emulsion is 6-8;

the average particle size of latex particles in the low-surface-energy aqueous self-polishing emulsion is 150-200 nm.

The invention provides a preparation method of the low-surface-energy water-based self-polishing emulsion, which comprises the following steps:

mixing a fluorine-containing acrylate monomer, an acrylic silicon ester monomer, an acrylate monomer, acrylic acid, an emulsifier and th water, and emulsifying to obtain a monomer emulsion;

dissolving an initiator in the second part of water to obtain an initiator aqueous solution;

stirring and mixing sodium bicarbonate, residual water, part of monomer emulsion and part of initiator aqueous solution, heating to 80-81 ℃, keeping the temperature, and continuously stirring for 50-100 min to obtain seed emulsion;

dropwise adding the residual monomer emulsion and the residual initiator aqueous solution into the seed emulsion at the temperature of 80-81 ℃, preserving heat for 50-70 min after dropwise adding, heating to 87-89 ℃, preserving heat for 50-70 min, then cooling to 50-55 ℃, and adding a pH regulator into the obtained system to obtain the low-surface-energy aqueous self-polishing emulsion.

Preferably, the th water accounts for 10-15% of the total amount of water, and the mass concentration of the initiator aqueous solution is 5-10%;

the part of the monomer emulsion accounts for 25-35% of the total amount of the monomer emulsion;

the part of the initiator aqueous solution accounts for 12-18% of the total amount of the initiator aqueous solution.

The invention provides low-surface-energy water-based self-polishing anti-drag antifouling paint which comprises the following preparation raw materials in percentage by mass:

the low-surface-energy aqueous self-polishing emulsion or the low-surface-energy aqueous self-polishing emulsion prepared by the preparation method of the technical scheme is 25-40%, the rosin emulsion is 5-15%, the aqueous slurry is 30-60%, the auxiliary agent is 1-3%, and the balance is water.

Preferably, the rosin emulsion is prepared from the following raw materials in parts by weight:

35-45 parts of rosin, 8-12 parts of a special rosin emulsifier and 45-55 parts of water.

Preferably, the aqueous slurry comprises the following preparation raw materials in percentage by mass:

40-60% of an antifouling agent, 8-15% of a pigment filler, 0.5-1% of a thickening agent, 0.5-1% of a water-based wetting dispersant and the balance of water.

Preferably, the auxiliary agent comprises a water-based leveling agent, a water-based defoaming agent and an antifreezing agent, and the mass ratio of the water-based leveling agent to the water-based defoaming agent to the antifreezing agent is 1: (1-2): (2-4).

The invention provides low-surface-energy water-based self-polishing emulsions which comprise, by mass, 5-15% of a fluorine-containing acrylate monomer, 10-20% of an acrylic silicone monomer, 20-30% of an acrylate monomer, 0.5-1.5% of acrylic acid, 1-2% of an emulsifier, 0.3-0.6% of an initiator, 0.05-0.1% of sodium bicarbonate, 0.3-0.5% of a pH regulator and the balance of water.

The invention provides low-surface-energy water-based self-polishing anti-drag antifouling paint which comprises, by mass, 25-40% of low-surface-energy water-based self-polishing emulsion, 5-15% of rosin emulsion, 30-60% of water-based slurry, 1-3% of an auxiliary agent and the balance of water, wherein the low-surface-energy water-based self-polishing emulsion is used as a film forming substance, and the rosin emulsion and the water-based slurry are matched to prepare the low-surface-energy water-based self-polishing anti-drag antifouling paint which has an obvious underwater drag reduction effect, a drag reduction rate of more than 10% and excellent antifouling performance, a sea static hanging plate is used for 8 months, a sea fouling area is less than 3%, and the drag reduction and antifouling requirements of an underwater vehicle can be met.

Drawings

FIG. 1 is a photograph of the water contact angle of a paint film formed by the low surface energy aqueous self-polishing drag reducing antifouling paint in example 1;

FIG. 2 is a graph showing the results of a shallow sea static hang plate test performed on an experimental sample and a control sample in the antifouling property evaluation.

Detailed Description

The invention provides low-surface-energy water-based self-polishing emulsions, which comprise the following preparation raw materials in percentage by mass:

5-15% of fluorine-containing acrylate monomer, 10-20% of acrylic silicon ester monomer, 20-30% of acrylate monomer, 0.5-1.5% of acrylic acid, 1-2% of emulsifier, 0.3-0.6% of initiator, 0.05-0.1% of sodium bicarbonate, 0.3-0.5% of pH regulator and the balance of water.

The raw materials for preparing the low-surface-energy water-based self-polishing emulsion comprise 5-15% of fluorine-containing acrylate monomers, preferably 8-12%, wherein the fluorine-containing acrylate monomers preferably comprise or more of dodecafluoro heptyl methacrylate, tridecafluorooctyl acrylate and octafluoropentyl acrylate, and more preferably dodecafluoro heptyl methacrylate or tridecafluorooctyl acrylate.

The raw materials for preparing the low-surface-energy water-based self-polishing emulsion comprise 10-20% of acrylic silicone monomer, and preferably 12-18%. In the present invention, the silicone acrylate monomer includes triisopropyl methacrylate and/or triisopropyl acrylate, and more preferably triisopropyl methacrylate. In the invention, after a paint film is formed by the low-surface-energy water-based self-polishing anti-drag antifouling paint, the acrylic silicon ester monomer on the surface of the paint is hydrolyzed in water and then peeled off under the action of water shearing, so that the surface self-polishing is realized, and the paint has good self-renewal capacity.

The raw materials for preparing the low-surface-energy water-based self-polishing emulsion comprise 20-30% of acrylate monomers, preferably 22-28%, wherein the acrylate monomers preferably comprise or more of methyl methacrylate, butyl acrylate, hydroxyethyl methacrylate and isobornyl methacrylate, more preferably a mixture of butyl acrylate, methyl methacrylate and isobornyl methacrylate, the mass ratio of butyl acrylate, methyl methacrylate and isobornyl methacrylate in the mixture is preferably 10 (45-55): 6-15), more preferably 10 (48-50): 8-11).

The raw material for preparing the low-surface-energy water-based self-polishing emulsion comprises 0.5-1.5% of acrylic acid, and preferably 0.7-1.3%. In the invention, the acrylic acid can improve the hydrophilicity of latex particles in the low-surface-energy aqueous self-polishing emulsion, is favorable for improving the dispersion stability of the low-surface-energy aqueous self-polishing emulsion, and is further favorable for ensuring that the low-surface-energy aqueous self-polishing anti-drag antifouling paint has better stability.

The raw materials for preparing the low-surface-energy aqueous self-polishing emulsion comprise 1-2% of emulsifier, preferably 1.2-1.8%, the emulsifier is preferably at least of anionic emulsifier, cationic emulsifier and nonionic emulsifier, more preferably a mixture of nonionic emulsifier and anionic emulsifier, the mass ratio of the nonionic emulsifier to the anionic emulsifier in the mixture is preferably (1.5-2.5): 1, more preferably 2: 1. in the invention, the anionic emulsifier preferably comprises sodium dodecyl sulfonate and/or sodium dodecyl benzene sulfonate, the cationic emulsifier preferably comprises dodecyl ammonium chloride and/or hexadecyl trimethyl ammonium bromide, and the nonionic emulsifier preferably comprises at least of emulsifier OP-10, emulsifier OP-15 and emulsifier T-20.

The raw materials for preparing the low-surface-energy water-based self-polishing emulsion comprise 0.3-0.6% of an initiator, preferably 0.4-0.5%; the initiator is preferably a persulfate initiator, more preferably ammonium persulfate or potassium persulfate.

In the invention, the raw material for preparing the low-surface-energy water-based self-polishing emulsion comprises 0.05-0.1% of sodium bicarbonate, and preferably 0.06-0.09%. In the invention, the sodium bicarbonate can adjust and buffer the pH value of the low-surface-energy aqueous self-polishing emulsion, which is beneficial to maintaining the stability of the low-surface-energy aqueous self-polishing emulsion, thereby ensuring that the low-surface-energy aqueous self-polishing anti-drag antifouling paint has better stability.

In the invention, the raw material for preparing the low-surface-energy aqueous self-polishing emulsion comprises 0.3-0.5% of pH regulator, wherein the pH regulator is preferably ammonia water, and the mass concentration of the ammonia water is preferably 25-28%. According to the invention, the pH value of the low-surface-energy aqueous self-polishing emulsion is adjusted by using the pH regulator, and the pH value is adjusted and buffered by matching with sodium bicarbonate, so that the excellent stability of the low-surface-energy aqueous self-polishing emulsion is ensured, and the stability of the low-surface-energy aqueous self-polishing anti-drag anti-fouling paint is improved.

In the present invention, the raw material for preparing the low surface energy aqueous self-polishing emulsion comprises the balance of water, and the water is preferably deionized water.

In the invention, the pH value of the low-surface-energy aqueous self-polishing emulsion is preferably 6-8; the average particle size of latex particles in the low-surface-energy aqueous self-polishing emulsion is preferably 150-200 nm; the solid content of the low-surface-energy aqueous self-polishing emulsion is preferably 46-49 wt% (GB 1725-2007); after the low surface energy aqueous self-polishing emulsion is formed into a film, the water contact angle is larger than 106 degrees.

The invention provides a preparation method of the low-surface-energy water-based self-polishing emulsion, which comprises the following steps:

mixing a fluorine-containing acrylate monomer, an acrylic silicon ester monomer, an acrylate monomer, acrylic acid, an emulsifier and th water, and emulsifying to obtain a monomer emulsion;

dissolving an initiator in the second part of water to obtain an initiator aqueous solution;

stirring and mixing sodium bicarbonate, residual water, part of monomer emulsion and part of initiator aqueous solution, heating to 80-81 ℃, keeping the temperature, and continuously stirring for 50-100 min to obtain seed emulsion;

dropwise adding the residual monomer emulsion and the residual initiator aqueous solution into the seed emulsion at the temperature of 80-81 ℃, preserving heat for 50-70 min after dropwise adding, heating to 87-89 ℃, preserving heat for 50-70 min, then cooling to 50-55 ℃, and adding a pH regulator into the obtained system to obtain the low-surface-energy aqueous self-polishing emulsion.

The method comprises the steps of mixing a fluorine-containing acrylate monomer, an acrylic silicon ester monomer, an acrylate monomer, acrylic acid, an emulsifier and th water, and then emulsifying to obtain a monomer emulsion, wherein the raw materials are preferably smoothly mixed, the fluorine-containing acrylate monomer, the acrylic silicon ester monomer, the acrylate monomer and the acrylic acid are uniformly mixed, and then the emulsifier and th water are added.

In the present invention, the emulsification is preferably performed under a stirring condition at room temperature, that is, without additional heating or cooling, in the embodiment of the present invention, the room temperature specifically means 25 ℃; the rotation speed of stirring is preferably 550-650 r/min, and the emulsifying time is preferably 25-35 min.

Dissolving an initiator in second water to obtain an initiator aqueous solution; the mass concentration of the initiator aqueous solution is preferably 5-10%, more preferably 5-8%, and the amount of the second part of water is preferably such that the mass concentration of the initiator aqueous solution satisfies the above requirements.

After the monomer emulsion and the initiator aqueous solution are obtained, stirring and mixing the sodium bicarbonate, the residual water, part of the monomer emulsion and part of the initiator aqueous solution, heating to 80-81 ℃, keeping the temperature, and continuously stirring for 50-100 min to obtain the seed emulsion. In the invention, the part of the monomer emulsion preferably accounts for 25-35% of the total amount of the monomer emulsion, and the part of the initiator aqueous solution preferably accounts for 12-18% of the total amount of the initiator aqueous solution. In the invention, the stirring and mixing are preferably carried out at room temperature, wherein the stirring speed is preferably 550-650 r/min, and the mixing time is preferably 25-35 min.

In the invention, after stirring and mixing, the heating rate required for heating from room temperature to 80-81 ℃ is preferably 5 ℃/min, and the slow heating is favorable for keeping the stability of the emulsion. After the temperature is increased to 80-81 ℃, the stirring is preferably continued for 30-60 min, and the stirring is continued for 20-40 min after weak blue light appears in the system, so that the stable seed emulsion with the weak blue light is obtained.

After the seed emulsion is obtained, dropwise adding the residual monomer emulsion and the residual initiator aqueous solution into the seed emulsion at the temperature of 80-81 ℃, preserving heat for 50-70 min after dropwise adding, heating to 87-89 ℃, preserving heat for 50-70 min, then cooling to 50-55 ℃, and adding a pH regulator into the obtained system to obtain the low-surface-energy aqueous self-polishing emulsion. In the invention, the residual monomer emulsion is preferably dripped within 1h, and the residual initiator aqueous solution is continuously replenished in batches during the dripping; in the process, the viscosity of the seed emulsion is obviously increased until the pH regulator is added, and finally the stable micelle dispersed low-surface-energy aqueous self-polishing emulsion with high cohesiveness is formed.

After the pH regulator is added, the obtained system is preferably filtered to remove a small amount of gel in the system, so that the low-surface-energy water-based self-polishing emulsion is obtained; the present invention is not particularly limited to the filtration, and the filtration may be performed in a manner known to those skilled in the art.

The invention provides low-surface-energy water-based self-polishing anti-drag antifouling paint which comprises the following preparation raw materials in percentage by mass:

the low-surface-energy aqueous self-polishing emulsion or the low-surface-energy aqueous self-polishing emulsion prepared by the preparation method of the technical scheme is 25-40%, the rosin emulsion is 5-15%, the aqueous slurry is 30-60%, the auxiliary agent is 1-3%, and the balance is water.

The low-surface-energy water-based self-polishing emulsion is used as a film forming substance, the rosin emulsion and the water-based slurry are used in a matching manner, and the auxiliary agent is used, so that the obtained water-based paint has low surface energy, the water contact angle of a paint film formed by the paint film is more than 106 degrees, the self-polishing rate of the paint film is stable, and the water resistance is good; meanwhile, the VOC content in the water-based paint is less than 20g/L, so that the water-based paint is environment-friendly; and the underwater drag reduction effect is obvious, the antifouling performance is excellent, and the drag reduction and antifouling requirements of an underwater vehicle can be met.

In the present invention, the rosin emulsion and the aqueous slurry are important components of the low surface energy aqueous self-polishing anti-drag and anti-fouling paint, and the rosin emulsion and the aqueous slurry are now described below.

According to the invention, the raw materials for preparing the rosin emulsion preferably comprise, by mass, 35-45 parts of rosin, 8-12 parts of a special rosin emulsifier and 45-55 parts of water, more preferably 37-42 parts of rosin, 9-11 parts of a special rosin emulsifier and 47-52 parts of water, and preferably comprises 40 parts of rosin, 10 parts of a special rosin emulsifier and 50 parts of water.

In the present invention, the preparation method of the rosin emulsion preferably comprises the following steps:

melting rosin and mixing with a special emulsifier for rosin to obtain a water-in-oil system;

and (3) dropwise adding 88-92 ℃ hot water into a 98-102 ℃ water-in-oil system to obtain the rosin emulsion.

The rosin is melted and then mixed with the special emulsifier for the rosin to obtain a water-in-oil system. The melting temperature of the rosin is not specially limited, and the rosin can be melted; in the embodiment of the invention, the rosin is heated and melted at 120 ℃. In the invention, the rosin is melted and then mixed with the emulsifier special for the rosin, preferably under the stirring condition, the stirring speed is preferably 550-650 r/min, the stirring time is not particularly limited, and the uniform mixing of the rosin and the emulsifier can be realized to form a water-in-oil system.

After a water-in-oil system is obtained, hot water at the temperature of 88-92 ℃ is dripped into the water-in-oil system at the temperature of 98-102 ℃ to obtain the rosin emulsion. The dropping rate of the hot water is not particularly limited in the invention, and the dropping rate can be conventional. In the embodiment of the invention, the temperature of the obtained water-in-oil system is reduced from 120 ℃ to 98-102 ℃, then 88-92 ℃ hot water is dripped, after the dripping is finished, the heat preservation stirring is continued for 20-30 min under the stirring speed condition of 200-300 r/min, then the temperature is naturally reduced to the room temperature, and the rosin emulsion is obtained by filtering.

In the invention, the aqueous slurry preferably comprises the following preparation raw materials in percentage by mass: 40-60% of an antifouling agent, 8-15% of a pigment filler, 0.5-1% of a thickening agent, 0.5-1% of a water-based wetting dispersant and the balance of water; more preferably, the preparation method comprises the following raw materials in percentage by mass: 45-55% of antifouling agent, 10-13% of pigment and filler, 0.6-0.8% of thickening agent, 0.6-0.8% of water-based wetting dispersant and the balance of water. In the present invention, the fineness of the aqueous slurry is preferably 40 μm or less.

The antifouling paint comprises a main antifouling agent and an auxiliary antifouling agent, wherein the mass ratio of the main antifouling agent to the auxiliary antifouling agent is preferably (5-7): 1, more preferably 6: 1, the main antifouling agent is preferably cuprous oxide and/or copper powder, more preferably cuprous oxide or copper powder, the auxiliary antifouling agent is preferably or more of copper pyrithione, zinc pyrithione, 4, 5-dichloro-2-n-octyl-4-isothiazoline-3-one, diuron and zineb, and when the auxiliary antifouling agent is a mixture of more than two components, the proportion of the components is not particularly limited.

In the invention, the pigment and filler preferably comprises or more of polytetrafluoroethylene micro powder, organic bentonite, iron oxide red, zinc oxide, calcium carbonate, barium sulfate, mica powder, quartz powder and talcum powder.

In the invention, the thickener preferably comprises a thickener DeuRheo WT-05A and hydroxyethyl cellulose, and the mass ratio of the thickener DeuRheo WT-05A to the hydroxyethyl cellulose is preferably (20-30): 1. in the invention, the thickening agent can increase the viscosity of the coating, prevent sagging during construction and is beneficial to improving the coating performance of the coating.

In the invention, the aqueous wetting dispersant preferably comprises or more of aqueous wetting dispersants AC 8892, BYK156 and BYK152, more preferably comprises aqueous wetting dispersants AC 8892, BYK156 or BYK 152.

The water used for preparing the aqueous slurry is not particularly limited in the present invention, and deionized water is preferably used.

In the present invention, the method for preparing the aqueous slurry preferably comprises the steps of:

and mixing the antifouling agent, the pigment filler, the thickening agent, the water-based wetting dispersant and water, and then carrying out ball milling to obtain the water-based slurry.

In the invention, the antifouling agent, the pigment filler, the thickening agent, the aqueous wetting dispersant and the water are preferably mixed uniformly, then the antifouling agent and the pigment filler are added, and the mixture is stirred and dispersed for 25-35 min under the condition of 800-1000 r/min. The ball milling is not specially limited, and the fineness of the finally obtained aqueous slurry can be ensured to be less than or equal to 40 mu m.

In the raw materials for preparing the low-surface-energy water-based self-polishing anti-drag anti-fouling paint provided by the invention, the auxiliary agent preferably comprises a water-based leveling agent, a water-based defoaming agent and an antifreezing agent, and the mass ratio of the water-based leveling agent to the water-based defoaming agent to the antifreezing agent is preferably 1: (1-2): (2-4).

In the invention, the aqueous leveling agent preferably comprises at least of aqueous leveling agents WCT 2490, BYK375 and DC57, more preferably aqueous leveling agents WCT 2490, BYK375 or DC57, and the aqueous leveling agent can prevent paint films from generating craters and is beneficial to improving the leveling performance of the paint films.

In the invention, the water-based defoaming agent preferably comprises at least of water-based defoaming agents DAPRO AP7010, BYK025 and DC65, more preferably DAPRO AP7010, BYK025 or DC65, and the water-based defoaming agent can eliminate bubbles in the coating, and is favorable for improving the appearance of a paint film and improving the workability of the coating.

In the present invention, the antifreeze preferably includes ethylene glycol and/or propylene glycol; the antifreezing agent can reduce the freezing point of the water-based paint, and is beneficial to improving the storage stability of the water-based paint in a low-temperature environment.

In the raw materials for preparing the low-surface-energy water-based self-polishing anti-drag and anti-fouling paint provided by the invention, the water is preferably deionized water.

In the invention, the solid content of the low-surface-energy water-based self-polishing, drag-reducing and antifouling paint is preferably 44-48 wt% (GB1725-2007), and the pigment ratio is preferably 1.2-1.8.

The preparation method of the low-surface-energy water-based self-polishing anti-drag anti-fouling paint is not specially limited, and the low-surface-energy water-based self-polishing anti-drag anti-fouling paint is obtained by mixing and filtering the preparation raw materials.

The technical solutions in the present invention will be described clearly and completely with reference to the embodiments in the present invention, it is obvious that the described embodiments are only partial embodiments , rather than all embodiments.