IPNs anti-corrosion antibacterial coating in marine environment as well as preparation method and application of IPNs anti-corrosion antibacterial coating

Abstract

The invention discloses an IPNs anti-corrosion antibacterial coating in a marine environment as well as a preparation method and application thereof, and belongs to the technical field of coatings. The coating comprises a semi-finished product A and a semi-finished product B in a weight ratio of 1: 1; the semi-finished product A comprises the following raw materials in parts by mass: 35-45 parts of acrylic acid, 1-4 parts of an antibacterial agent and 3-12 parts of a dispersing agent; the semi-finished product B comprises the following raw materials in parts by mass: 6-12 parts of a curing agent, 3-8 parts of a film-forming agent and 8-15 parts of a pH regulator; 20 to 32 parts of a filling agent; the curing agent comprises an organic silicon curing agent and a fatty acid anhydride curing agent in a mass ratio of (4-7): (2-6). The invention further provides a preparation method of the coating and application of the coating in marine operation equipment. The marine operation equipment comprises a naval vessel, an anchor chain, drilling equipment, an instrument and a culture net cage. The anti-corrosion and antibacterial performance of the coating is effectively improved, the curing time is short, the subsequent coating method is simple and easy to implement, and the coating is suitable for large-scale production.

Description

Technical Field

[0001] The invention relates to an anticorrosion and antibacterial coating and a preparation method thereof, and in particular to an IPNs anticorrosion and antibacterial coating in a marine environment and a preparation method and application thereof, belonging to the technical field of coatings. Background Art

[0002] At present, ships and warships are sailing in the ocean for a long time, and their surface will inevitably be attached and grown by microorganisms and seaweeds. If this continues for a long time, it will have a serious adverse effect on objects immersed in seawater such as ships, drilling equipment, instruments, and aquaculture cages, thereby causing reliability and safety problems in the service of ocean-going ships, offshore operating equipment, and naval ships. Marine biological corrosion and damage to the hull has always been an unavoidable problem for ships to maintain normal and safe driving. The harm caused by biological fouling to marine operating equipment such as ships and drilling equipment is self-evident. In order to respond to the call of the era theme of Greenpeace, traditional anti-corrosion and antibacterial coating materials are gradually withdrawing from this field due to their strong toxicity and extremely unfriendly to the environment. The research and development of new, efficient and environmentally friendly anti-corrosion and antibacterial coating materials is imminent.

[0003] Polyacrylamide coating has excellent waterproof function. Due to its high strength, high weather resistance and excellent adhesion, the IPNs coating formed with polyacrylamide / polydimethylsiloxane can effectively prevent moisture (seawater) penetration and protect objects from water erosion and damage.

[0004] Curing agent plays a vital role in the preparation of coatings. It can improve the hardness and wear resistance of coatings and enhance the stability of coatings. Curing time is an important production process parameter for considering IPNs anti-corrosion and antibacterial coatings. Too short curing time or too long curing time is not suitable for mass production of anti-corrosion and antibacterial coatings. However, traditional curing agents often have problems such as uneven dispersion and poor curing effect. Therefore, the development of a new type of composite curing agent is of great significance for improving the anti-corrosion and antibacterial properties of coatings. Therefore, in the prior art, there is an urgent need for an IPNs anti-corrosion and antibacterial coating in a marine environment, and a preparation method and application thereof. Summary of the invention

[0005] The purpose of the present invention is to address the problems existing in the prior art and provide an IPNs anti-corrosion and antibacterial coating for a marine environment. The present invention adopts polyacrylamide as a matrix, and simultaneously adds an antibacterial agent, a dispersant, a silicone curing agent, a fatty acid anhydride curing agent, a film-forming agent, a pH regulator, and a filler, so that the generated anti-corrosion and antibacterial coating can effectively adhere to the surface of a ship, protect the hull and marine engineering equipment, and extend the life of the ship at sea. The coating has a good anti-corrosion and antibacterial effect. The coating can provide marine vessels with a longer life and less pollution under special marine corrosion environment conditions.

[0006] At the same time, the present invention provides a method for preparing an IPNs anti-corrosion and antibacterial coating in a marine environment. The method solves the problems of uneven dispersion and unstable performance of traditional coating materials, and has a moderate curing time and good curing effect. The neutral salt spray test is ≥3000 hours and the antibacterial rate (Escherichia coli, Staphylococcus aureus) is ≥99%.

[0007] At the same time, the present invention provides an application of an IPNs anti-corrosion and antibacterial coating in marine operating equipment under a marine environment.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0009] An IPNs anti-corrosion and antibacterial coating for marine environments, comprising a semi-finished product A and a semi-finished product B in a weight ratio of 1:1;

[0010] Semi-finished product A includes the following raw materials in parts by weight: 35-45 parts of acrylic acid, 1-4 parts of antibacterial agent, and 3-12 parts of dispersant;

[0011] Semi-finished product B includes the following raw materials in parts by weight: 6-12 parts of curing agent, 3-8 parts of film-forming agent, 8-15 parts of pH adjuster; 20-32 parts of filler;

[0012] The curing agent includes an organosilicon curing agent and a fatty acid anhydride curing agent in a mass ratio of (4-7): (2-6);

[0013] Coating thickness 20-100μm.

[0014] Preferably, the acrylic acid is one or two of polyacrylamide, acrylic acid-modified epoxy, and acrylic resin.

[0015] Preferably, the antibacterial agent is any one of nano silver, titanium dioxide, nano zinc oxide, and quaternary ammonium salt compounds, or a mixture of several of them.

[0016] Preferably, the dispersant is a polyolefin type dispersant; polyolefin type dispersants include polyethylene.

[0017] Preferably, the organosilicon curing agent is polydimethylsiloxane and / or organosilicon; and the fatty acid anhydride curing agent is fatty acid anhydride.

[0018] Preferably, the film-forming agent is one or a mixture of an organic silicon film-forming agent, an acrylic resin film-forming agent, and a propylene glycol methyl ether acetate film-forming agent.

[0019] Preferably, the pH adjuster is any one of ammonia water, ethanolamine, diethanolamine, triethanolamine, and N,N-dimethylethanolamine, or a mixture of several of them.

[0020] Preferably, the filler is any one of melamine, silicate powder, talcum powder, glass fiber, phenyl glycidyl ether, or a mixture of several of them.

[0021] A method for preparing an IPNs anti-corrosion and antibacterial coating in a marine environment comprises the following steps:

[0022] S01, weigh the raw materials according to the designed weight;

[0023] S02, fully stir acrylic acid, antibacterial agent and dispersant at 200-800 r / min for 5-10 minutes and then ultrasonically disperse at 500-1500 WKW and 500-1000 r / min for 5-10 minutes to obtain semi-finished product A;

[0024] S03, the curing agent and the pH adjusting agent are first mixed and stirred at 300-500r / min for 5-10 minutes, and then the film-forming agent and the filler are added, and the mixture is fully stirred at 200-800r / min for 5-10 minutes, and then ultrasonically diffused at 500-1500WKW and a speed of 500-1000r / min for 5-10 minutes to obtain the semi-finished product B;

[0025] S04, semi-finished product A and semi-finished product B are mixed in a weight ratio of 1:1, stirred thoroughly for 1-2 minutes, and then evenly coated on the surface of marine operating equipment by brushing or spraying, with a thickness of 20-100μm. After curing at room temperature for 1-2 hours, the IPNs anti-corrosion and antibacterial coating in the marine environment is obtained.

[0026] The invention discloses an application of an IPNs anti-corrosion and antibacterial coating in marine environment in marine operation equipment, wherein the marine operation equipment includes ships, anchor chains, drilling equipment, instruments and apparatus, and aquaculture cages.

[0027] In the semi-finished product A, the ratio of acrylic acid, antimicrobial agent and dispersant can be adjusted according to actual needs to achieve the best antiseptic and antimicrobial effect.

[0028] In the semi-finished product B, the ratio of the organic curing agent to the fatty acid anhydride curing agent can be appropriately adjusted according to the ambient temperature. The film-forming agent and pH regulator, and the parameters of the fatty acid ultrasonic diffusion treatment (such as ultrasonic power, treatment time, etc.) can be optimized according to the properties of the mixture and the required coating performance.

[0029] The present invention has the following beneficial effects:

[0030] The IPNs anticorrosion and antibacterial coating for marine environment of the present invention makes the antibacterial preservative and curing agent uniformly dispersed by stirring ultrasonic dispersion technology, effectively improving the anticorrosion and antibacterial performance of the coating. At the same time, the two semi-finished products are stored separately, with good stability and long warranty period; when the workpiece that needs to be treated with anticorrosion and antibacterial treatment is reached, it can be taken out for simple stirring and mixing, sprayed or brushed on the workpiece, and after curing at room temperature, an IPNs anticorrosion and antibacterial coating for marine environment can be obtained, and the subsequent coating method is simple and easy, and suitable for large-scale production.

[0031] The IPNs coating of the present invention can effectively prevent water (seawater) from penetrating, protect objects from water erosion and damage, and the coating with IPNs molecular chains interpenetrating each other can also crosslink other special functional substances. The method crosslinks the antibacterial material, so that the coating has high anticorrosion and antibacterial properties. According to GB / T 10125-2012 "Artificial Atmosphere Corrosion Test-Salt Spray Test", the neutral salt spray test is ≥3000 hours, and according to GB / T 21510-2008 "Nano Inorganic Material Antibacterial Performance Test Method", the antibacterial rate of Escherichia coli and Staphylococcus aureus is ≥99%.

[0032] The dispersant in the coating material of the present invention can be a polyolefin type dispersant, which has excellent dispersing ability in water-based, solvent-based and high-solid content coatings. At the same time, due to its loose molecular chain structure and large number of molecular chains, polyolefins such as polyethylene and polypropylene can be more closely combined with its molecules, and have good performance in terms of pigment dispersion and interfacial activity; the coordinated deployment of multiple components controls the complete curing time of the coating to about 1-2 hours, greatly improving the production efficiency of the coating.

[0033] The ultrasonic dispersion technology of the present invention, as a physical dispersion method, can significantly improve the dispersion and stability of additives in the matrix. The application of ultrasonic dispersion technology in coating preparation can solve the problems of uneven dispersion and unstable performance of traditional coating materials. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with specific examples. The following examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0035] Example 1

[0036] An IPNs anti-corrosion and antibacterial coating for marine environment, wherein semi-finished product A is composed of the following parts by mass: 40 kg of polyacrylamide, 2 kg of antibacterial agent (0.5 kg of nano-silver, 0.5 kg of titanium dioxide, 1 kg of nano-zinc oxide), and 8 kg of dispersant (polyethylene); semi-finished product B is composed of the following parts by mass: 4 kg of organosilicon curing agent (polydimethylsiloxane), 2 kg of fatty acid anhydride curing agent (fatty acid anhydride), 4 kg of film-forming agent (0.5 kg of organosilicon film-forming agent, 1.5 kg of acrylic resin film-forming agent, 2 kg of propylene glycol methyl ether acetate film-forming agent), 8 kg of pH adjusting agent (1 kg of ethanolamine, 1 kg of diethanolamine, 3 kg of triethanolamine, 3 kg of N,N-dimethylethanolamine), and 32 kg of filler (5 kg of melamine, 10 kg of silicate powder, 10 kg of talc, 5 kg of glass fiber, and 2 kg of phenyl glycidyl ether).

[0037] The preparation method of the antibacterial and anticorrosive coating comprises the following steps:

[0038] Step 1: Semi-finished Ingredients

[0039] Semi-finished product A: accurately weigh 40 kg of polyacrylamide, 2 kg of antibacterial agent (0.5 kg of nano-silver, 0.5 kg of titanium dioxide, 1 kg of nano-zinc oxide), and 8 kg of dispersant; Semi-finished product B: accurately weigh 4 kg of silicone curing agent, 2 kg of fatty acid anhydride curing agent, 4 kg of film-forming agent (0.5 kg of silicone film-forming agent, 1.5 kg of acrylic resin film-forming agent, 2 kg of propylene glycol methyl ether acetate film-forming agent), 8 kg of pH adjuster (1 kg of ethanolamine, 1 kg of diethanolamine, 3 kg of triethanolamine, 3 kg of N,N-dimethylethanolamine), and 32 kg of filler (5 kg of melamine, 10 kg of silicate powder, 10 kg of talc, 5 kg of glass fiber, 2 kg of phenyl glycidyl ether).

[0040] Step 2: Production of semi-finished products A and B

[0041] Place the accurately proportioned material A in the ultrasonic agitator, close the cover, turn on the machine, adjust the stirring speed to 300r / min, stir for 7 minutes, then adjust the ultrasonic power to 1000WKW, the speed to 500r / min, and stir for 5 minutes. Stop the equipment, put the material into a black plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product A, and seal it for later use.

[0042] Mix the curing agent and pH regulator at 300r / min for 10 minutes, then add the film former and filler, put the accurately proportioned material B in the ultrasonic agitator, close the cover, turn on the machine and adjust the stirring speed to 300r / min for 7 minutes, then adjust the ultrasonic power to 1000WKW, the speed to 500r / min, and ultrasonically stir for 5 minutes. Stop the equipment, put the materials into a blue plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product B, and seal it for use.

[0043] Step 3: Preparation of IPNs anticorrosive and antibacterial coating in marine environment

[0044] Pour the prepared semi-finished product A and semi-finished product B into a fully automatic stirring cup in a weight ratio of 1:1, 1 kg of material A and 1 kg of material B, cover the lid, turn on the stirring switch, stir for 1 minute, pour the mixture into a professional pressure-feeding spray gun pot, adjust the pressure-feeding air pressure at 2.5 atmospheres, adjust the stainless steel needle nozzle knob (2mm nozzle gun), so that the IPNs anti-corrosion and antibacterial coating under the marine environment can be quickly and evenly sprayed on the surface of the antibacterial object in a fine and large fan-shaped manner, control the spraying thickness to be about 50μm (about 15-18 square meters / kg), and after curing at room temperature for 1 hour, an IPNs anti-corrosion and antibacterial coating under the marine environment can be obtained. The neutral salt spray test of the coating is ≥3000 hours, and the antibacterial rate (Escherichia coli, Staphylococcus aureus) is ≥99%. Specifically, the neutral salt spray test of the coating obtained in this embodiment is 3100 hours; the antibacterial rate: Escherichia coli 99.9%, Staphylococcus aureus 99.5%.

[0045] The invention discloses an application of an IPNs anti-corrosion and antibacterial coating in marine environment in marine operation equipment, wherein the marine operation equipment includes ships, anchor chains, drilling equipment, instruments and apparatus, and aquaculture cages.

[0046] Example 2

[0047] A preparation method for an IPNs anti-corrosion and antibacterial coating in a marine environment. The semi-finished product A is composed of the following parts by mass: 35 kg of polyacrylamide, 3 kg of antibacterial agent (0.75 kg of nano silver, 0.75 kg of titanium dioxide, and 1.5 kg of nano zinc oxide), and 12 kg of dispersant (polyethylene); the semi-finished product B is composed of the following parts by mass: 6 kg of organic silicon curing agent, 3 kg of fatty acid anhydride curing agent, 8 kg of film-forming agent (1 kg of organic silicon film-forming agent, 3 kg of acrylic resin film-forming agent, and 4 kg of propylene glycol methyl ether acetate film-forming agent), 9 kg of pH adjusting agent (1.5 kg of ethanolamine, 1.5 kg of diethanolamine, 3 kg of triethanolamine, and 3 kg of N,N-dimethylethanolamine), and 24 kg of filler (4 kg of melamine, 6 kg of silicate powder, 6 kg of talc, 6 kg of glass fiber, and 2 kg of phenyl glycidyl ether).

[0048] The preparation method of the antibacterial and anticorrosive coating comprises the following steps:

[0049] Step 1: Semi-finished Ingredients

[0050] Semi-finished product A: accurately weigh 35 kg of polyacrylamide, 3 kg of antibacterial agent (0.75 kg of nano silver, 0.75 kg of titanium dioxide, 1.5 kg of nano zinc oxide), and 12 kg of dispersant; Semi-finished product B: accurately weigh 6 kg of silicone curing agent, 3 kg of fatty acid anhydride curing agent, 8 kg of film-forming agent (1 kg of silicone film-forming agent, 3 kg of acrylic resin film-forming agent, 4 kg of propylene glycol methyl ether acetate film-forming agent), 9 kg of pH adjuster (1.5 kg of ethanolamine, 1.5 kg of diethanolamine, 3 kg of triethanolamine, 3 kg of N,N-dimethylethanolamine), and 24 kg of filler (4 kg of melamine, 6 kg of silicate powder, 6 kg of talc, 6 kg of glass fiber, and 2 kg of phenyl glycidyl ether).

[0051] Step 2: Production of semi-finished products A and B

[0052] Place the accurately proportioned material A in the ultrasonic agitator, close the cover, turn on the machine, adjust the stirring speed to 400r / min, stir for 6 minutes, then adjust the ultrasonic power to 1200WKW, the speed to 800r / min, and stir for 5 minutes. Stop the equipment, put the material into a black plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product A, and seal it for later use.

[0053] Mix the curing agent and pH regulator at 400r / min for 5 minutes, then add the film former and filler, put the accurately proportioned material B in the ultrasonic agitator, close the cover, turn on the machine and adjust the stirring speed to 400r / min for 6 minutes, then adjust the ultrasonic power to 1200WKW, the speed to 800r / min, and stir ultrasonically for 5 minutes. Stop the equipment, put the materials into a blue plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product B, and seal it for use.

[0054] Step 3: Preparation of IPNs anticorrosive and antibacterial coating in marine environment

[0055] Pour the prepared semi-finished product A and semi-finished product B into a fully automatic stirring cup in a weight ratio of 1:1, 1 kg of material A and 1 kg of material B, cover the lid, turn on the stirring switch, stir for 1 minute, pour the mixture into a professional pressure-feeding spray gun pot, adjust the pressure-feeding air pressure at 2.5 atmospheres, adjust the stainless steel needle nozzle knob (2mm nozzle gun), so that the IPNs anti-corrosion and antibacterial coating under the marine environment is quickly and evenly, finely and fan-shaped sprayed on the surface of the antibacterial object, control the spraying thickness to about 50μm (about 15-18 square meters / kg), and after curing at room temperature for 2 hours, an IPNs anti-corrosion and antibacterial coating under the marine environment can be obtained. The neutral salt spray test of the coating is ≥3000 hours, and the antibacterial rate (Escherichia coli, Staphylococcus aureus) is ≥99%. Specifically, the neutral salt spray test of the coating obtained in this embodiment is 3000 hours, and the antibacterial rate is: Escherichia coli 99.5%, Staphylococcus aureus 99.5%.

[0056] The invention discloses an application of an IPNs anti-corrosion and antibacterial coating in marine environment in marine operation equipment, wherein the marine operation equipment includes ships, anchor chains, drilling equipment, instruments and apparatus, and aquaculture cages.

[0057] Example 3

[0058] A preparation method for an IPNs anti-corrosion and antibacterial coating in a marine environment. The semi-finished product A is composed of the following parts by mass: 42 kg of polyacrylamide, 2 kg of antibacterial agent (0.5 kg of nanosilver, 0.5 kg of titanium dioxide, 1 kg of nano zinc oxide), and 6 kg of dispersant; the semi-finished product B is composed of the following parts by mass: 7 kg of organic silicon curing agent, 3 kg of fatty acid anhydride curing agent, 7 kg of film-forming agent (1 kg of organic silicon film-forming agent, 2 kg of acrylic resin film-forming agent, 4 kg of propylene glycol methyl ether acetate film-forming agent), 12 kg of pH adjusting agent (2 kg of ethanolamine, 2 kg of diethanolamine, 4 kg of triethanolamine, 4 kg of N,N-dimethylethanolamine), and 21 kg of filler (3 kg of melamine, 5 kg of silicate powder, 5 kg of talc, 6 kg of glass fiber, and 2 kg of phenyl glycidyl ether).

[0059] The preparation method of the antibacterial and anticorrosive coating comprises the following steps:

[0060] Step 1: Semi-finished Ingredients

[0061] Semi-finished product A: accurately weigh 42 kg of polyacrylamide, 2 kg of antibacterial agent (0.5 kg of nano silver, 0.5 kg of titanium dioxide, 1 kg of nano zinc oxide), and 6 kg of dispersant; Semi-finished product B: accurately weigh 7 kg of silicone curing agent, 3 kg of fatty acid anhydride curing agent, 7 kg of film-forming agent (1 kg of silicone film-forming agent, 2 kg of acrylic resin film-forming agent, 4 kg of propylene glycol methyl ether acetate film-forming agent), 12 kg of pH adjuster (2 kg of ethanolamine, 2 kg of diethanolamine, 4 kg of triethanolamine, 4 kg of N,N-dimethylethanolamine), and 21 kg of filler (3 kg of melamine, 5 kg of silicate powder, 5 kg of talc, 6 kg of glass fiber, 2 kg of phenyl glycidyl ether).

[0062] Step 2: Production of semi-finished products A and B

[0063] Place the accurately proportioned material A in the ultrasonic agitator, close the cover, turn on the machine, adjust the stirring speed to 600r / min, stir for 5 minutes, then adjust the ultrasonic power to 1000WKW, the speed to 600r / min, and stir for 5 minutes. Stop the equipment, put the material into a black plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product A, and seal it for later use.

[0064] Mix the curing agent and pH regulator at 400r / min for 6 minutes, then add the film former and filler, place the accurately proportioned material B in the ultrasonic agitator, close the cover, turn on the machine and adjust the stirring speed to 600r / min for 5 minutes, then adjust the ultrasonic power to 1000WKW, the speed to 600r / min, and ultrasonically stir for 5 minutes. Stop the equipment, put the materials into a blue plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product B, and seal it for use.

[0065] Step 3: Preparation of IPNs anticorrosive and antibacterial coating in marine environment

[0066] Pour the prepared semi-finished product A and semi-finished product B into a fully automatic stirring cup in a weight ratio of 1:1, 1 kg of material A and 1 kg of material B, cover the lid, turn on the stirring switch, stir for 1 minute, pour the mixture into a professional pressure-feeding spray gun pot, adjust the pressure-feeding air pressure at 2.5 atmospheres, adjust the stainless steel needle nozzle knob (2mm nozzle gun), so that the IPNs anti-corrosion and antibacterial coating in the marine environment can be quickly and evenly sprayed on the surface of the antibacterial object in a fine and large fan-shaped manner, control the spraying thickness to be about 60μm (about 12.5-15 square meters / kg), and after curing at room temperature for 1.5 hours, an IPNs anti-corrosion and antibacterial coating in the marine environment can be obtained. The neutral salt spray test of the coating is ≥3000 hours, and the antibacterial rate (Escherichia coli, Staphylococcus aureus) is ≥99%. Specifically, the neutral salt spray test of the coating obtained in this embodiment is 3500 hours; the antibacterial rate: Escherichia coli 99.5%, Staphylococcus aureus 99.6%.

[0067] The invention discloses an application of an IPNs anti-corrosion and antibacterial coating in marine environment in marine operation equipment, wherein the marine operation equipment includes ships, anchor chains, drilling equipment, instruments and apparatus, and aquaculture cages.

[0068] Example 4

[0069] A preparation of an IPNs anti-corrosion and antibacterial coating for a marine environment. Semi-finished product A is composed of the following parts by mass: 44 kg of polyacrylamide, 1 kg of antibacterial agent (0.5 kg of nanosilver, 0.5 kg of titanium dioxide), and 4 kg of dispersant; semi-finished product B is composed of the following parts by mass: 5 kg of organosilicon curing agent, 5 kg of fatty acid anhydride curing agent, 5 kg of film-forming agent (5 kg of organosilicon film-forming agent), 15 kg of pH adjusting agent (15 kg of ammonia water), and 20 kg of filler (20 kg of melamine).

[0070] The preparation method of the antibacterial and anticorrosive coating comprises the following steps:

[0071] Step 1: Semi-finished Ingredients

[0072] Semi-finished product A: accurately weigh 44 kg of polyacrylamide, 1 kg of antibacterial agent (0.5 kg of nanosilver, 0.5 kg of titanium dioxide), and 4 kg of dispersant; Semi-finished product B: accurately weigh 5 kg of silicone curing agent, 5 kg of fatty acid anhydride curing agent, 5 kg of film-forming agent (5 kg of silicone film-forming agent), 15 kg of pH adjuster (15 kg of ammonia water), and 20 kg of filler (20 kg of melamine).

[0073] Step 2: Production of semi-finished products A and B

[0074] Place the accurately proportioned material A in the ultrasonic agitator, close the cover, turn on the machine, adjust the stirring speed to 800r / min, stir for 10 minutes, then adjust the ultrasonic power to 1500WKW, the speed to 1000r / min, and stir for 10 minutes. Stop the equipment, put the material into a black plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product A, and seal it for later use.

[0075] Mix the curing agent and pH regulator at 500r / min for 7 minutes, then add the film former and filler, put the accurately proportioned material B in the ultrasonic agitator, close the cover, turn on the machine and adjust the stirring speed to 800r / min for 10 minutes, then adjust the ultrasonic power to 1500WKW, the speed to 1000r / min, and stir ultrasonically for 10 minutes. Stop the equipment, put the materials into a blue plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product B, and seal it for use.

[0076] Step 3: Preparation of IPNs anticorrosive and antibacterial coating in marine environment

[0077] Pour the prepared semi-finished product A and semi-finished product B into a fully automatic stirring cup in a weight ratio of 1:1, 1 kg of material A and 1 kg of material B, cover the lid, turn on the stirring switch, stir for 2 minutes, pour the mixture into a professional pressure-feeding spray gun pot, adjust the pressure-feeding air pressure at 2.5 atmospheres, adjust the stainless steel needle nozzle knob (2mm nozzle gun), so that the IPNs anti-corrosion and antibacterial coating in the marine environment can be quickly and evenly sprayed on the surface of the antibacterial object in a delicate large fan-shaped manner, control the spraying thickness to about 20μm, and after curing at room temperature for 1 hour, an IPNs anti-corrosion and antibacterial coating in the marine environment can be obtained. The neutral salt spray test of the coating is ≥3000 hours, and the antibacterial rate (Escherichia coli, Staphylococcus aureus) is ≥99%. Specifically, the neutral salt spray test of the coating obtained in this embodiment is 3300 hours; the antibacterial rate: Escherichia coli 99.7%, Staphylococcus aureus 99.9%.

[0078] The invention discloses an application of an IPNs anti-corrosion and antibacterial coating in marine environment in marine operation equipment, wherein the marine operation equipment includes ships, anchor chains, drilling equipment, instruments and apparatus, and aquaculture cages.

[0079] Example 5

[0080] An IPNs anti-corrosion and antibacterial coating for a marine environment, wherein a semi-finished product A is composed of the following parts by mass: 45 kg of polyacrylamide, 4 kg of antibacterial agent (4 kg of nanosilver), and 3 kg of dispersant; a semi-finished product B is composed of the following parts by mass: 6 kg of organic silicon curing agent, 6 kg of fatty acid anhydride curing agent, 3 kg of film-forming agent (1 kg of organic silicon film-forming agent, 2 kg of acrylic resin film-forming agent), 12 kg of pH adjusting agent (2 kg of ethanolamine, 3 kg of diethanolamine, 4 kg of triethanolamine, 3 kg of N,N-dimethylethanolamine), and 20 kg of filler (3 kg of melamine, 5 kg of silicate powder, 5 kg of talc, 5 kg of glass fiber, and 2 kg of phenyl glycidyl ether).

[0081] The preparation method of the antibacterial and anticorrosive coating comprises the following steps:

[0082] Step 1: Semi-finished Ingredients

[0083] Semi-finished product A: accurately weigh 45 kg of polyacrylamide, 4 kg of antibacterial agent (4 kg of nanosilver), and 3 kg of dispersant; semi-finished product B: accurately weigh 6 kg of silicone curing agent, 6 kg of fatty acid anhydride curing agent, 3 kg of film-forming agent (1 kg of silicone film-forming agent, 2 kg of acrylic resin film-forming agent), 12 kg of pH adjuster (2 kg of ethanolamine, 3 kg of diethanolamine, 4 kg of triethanolamine, 3 kg of N,N-dimethylethanolamine), and 20 kg of filler (3 kg of melamine, 5 kg of silicate powder, 5 kg of talc, 5 kg of glass fiber, and 2 kg of phenyl glycidyl ether).

[0084] Step 2: Production of semi-finished products A and B

[0085] Place the accurately proportioned material A in the ultrasonic agitator, close the cover, turn on the machine, adjust the stirring speed to 200r / min, stir for 8 minutes, then adjust the ultrasonic power to 500WKW, the speed to 600r / min, and stir for 5 minutes. Stop the equipment, put the material into a black plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product A, and seal it for later use.

[0086] Mix the curing agent and pH regulator at 400r / min for 7 minutes, then add the film former and filler, place the accurately proportioned material B in the ultrasonic agitator, close the cover, turn on the machine and adjust the stirring speed to 200r / min for 9 minutes, then adjust the ultrasonic power to 500WKW, the speed to 600r / min, and ultrasonically stir for 5 minutes. Stop the equipment, put the materials into a blue plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product B, and seal it for use.

[0087] Step 3: Preparation of IPNs anticorrosive and antibacterial coating in marine environment

[0088] Pour the prepared semi-finished product A and semi-finished product B into a fully automatic stirring cup at a weight ratio of 1:1, 1 kg of material A and 1 kg of material B, cover the lid, turn on the stirring switch, stir for 1 minute, and directly brush the mixture on the surface of the antibacterial object, control the brushing thickness to be about 100 μm, and after curing at room temperature for 1.5 hours, an IPNs anti-corrosion and antibacterial coating in a marine environment can be obtained. The neutral salt spray test of the coating is ≥3000 hours, and the antibacterial rate (Escherichia coli, Staphylococcus aureus) is ≥99%. Specifically, the neutral salt spray test of the coating obtained in this embodiment is 3500 hours; the antibacterial rate: Escherichia coli 99.5%, Staphylococcus aureus 99.8%.

[0089] The invention discloses an application of an IPNs anti-corrosion and antibacterial coating in marine environment in marine operation equipment, wherein the marine operation equipment includes ships, anchor chains, drilling equipment, instruments and apparatus, and aquaculture cages.

[0090] Comparative Example 1

[0091] The difference between this comparative example and Example 1 is only that:

[0092] 3 kg of silicone curing agent and 2 kg of fatty acid anhydride curing agent.

[0093] The room temperature curing time of the coating obtained in this comparative example is 6 hours. The neutral salt spray test of the coating lasts for 2400 hours, and the antibacterial rate is: Escherichia coli 80%, and Staphylococcus aureus 85%.

[0094] Comparative Example 2

[0095] The difference between this comparative example and Example 1 is only that:

[0096] 8 kg of silicone curing agent and 2 kg of fatty acid anhydride curing agent.

[0097] The room temperature curing time of the coating obtained in this comparative example is 7 hours. The neutral salt spray test of the coating lasts for 2500 hours, and the antibacterial rates are: 77% for Escherichia coli and 82% for Staphylococcus aureus.

[0098] Comparative Example 3

[0099] The difference between this comparative example and Example 1 is only that:

[0100] Place the accurately proportioned material A in a mixing barrel, stir mechanically at 300r / min for 7 minutes, and then stir mechanically at 500r / min for 5 minutes. Stop the equipment, put the material into a black plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product A, and seal it for later use.

[0101] Mix the curing agent and pH adjuster at 300r / min for 10 minutes, then add the film former and filler, place the accurately proportioned material B in the mixing barrel, stir mechanically at 300r / min for 7 minutes, and then stir mechanically at 500r / min for 5 minutes. Stop the equipment, put the materials into a blue plastic barrel, mark it with IPNs anti-corrosion and antibacterial semi-finished product B, and seal it for use.

[0102] The room temperature curing time of the coating obtained in this comparative example is 3.5 hours. The neutral salt spray test of the coating lasts for 2800 hours, and the antibacterial rate is: 90% for Escherichia coli and 93% for Staphylococcus aureus.

[0103] It should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the previously disclosed embodiments. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0104] Although the present invention has been described according to a limited number of embodiments, it will be apparent to those skilled in the art, with the benefit of the above description, that other embodiments may be envisioned within the scope of the invention thus described. In addition, it should be noted that the language used in this specification is selected primarily for readability and didactic purposes, rather than for explaining or defining the subject matter of the present invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is illustrative, not restrictive, with respect to the scope of the present invention, which is defined by the appended claims.

[0105] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An IPNs anti-corrosion and antibacterial coating in a marine environment, characterized in that: It includes semi-finished product A and semi-finished product B in a weight ratio of 1:1; Semi-finished product A includes the following raw materials in parts by weight: 35-45 parts of acrylic acid, 1-4 parts of antibacterial agent, and 3-12 parts of dispersant; Semi-finished product B includes the following raw materials in parts by weight: 6-12 parts of curing agent, 3-8 parts of film-forming agent, and 8-15 parts of pH regulator; 20-32 parts of filler; The curing agent includes an organosilicon curing agent and a fatty acid anhydride curing agent in a mass ratio of (4-7): (2-6); Coating thickness 20-100μm.

2. The IPNs anti-corrosion and antibacterial coating for marine environment according to claim 1, characterized in that: The acrylic acid is one or two of polyacrylamide, acrylic acid-modified epoxy and acrylic resin.

3. The IPNs anti-corrosion and antibacterial coating for marine environment according to claim 1, characterized in that: The antibacterial agent is any one of nano silver, titanium dioxide, nano zinc oxide, and quaternary ammonium salt compounds or a mixture of several of them.

4. The IPNs anti-corrosion and antibacterial coating for marine environment according to claim 1, characterized in that: The dispersant is a polyolefin type dispersant; the polyolefin type dispersant includes polyethylene.

5. The IPNs anti-corrosion and antibacterial coating for marine environment according to claim 1, characterized in that: The organosilicon curing agent is polydimethylsiloxane and / or organosilicon; the fatty acid anhydride curing agent is fatty acid anhydride.

6. The IPNs anti-corrosion and antibacterial coating for marine environment according to claim 1, characterized in that: The film-forming agent is one or a mixture of organic silicon film-forming agent, acrylic resin film-forming agent, and propylene glycol methyl ether acetate film-forming agent.

7. The IPNs anti-corrosion and antibacterial coating for marine environment according to claim 1, characterized in that: The pH adjuster is any one of ammonia water, ethanolamine, diethanolamine, triethanolamine, and N,N-dimethylethanolamine, or a mixture of several of them.

8. The IPNs anti-corrosion and antibacterial coating for marine environment according to claim 1, characterized in that: The filler is any one of melamine, silicate powder, talcum powder, glass fiber, and phenyl glycidyl ether, or a mixture of several of them.

9. The method for preparing an IPNs anti-corrosion and antibacterial coating in a marine environment according to any one of claims 1 to 8, characterized in that: The following steps are involved: S01, weigh the raw materials according to the designed weight; S02, fully stir acrylic acid, antibacterial agent and dispersant at 200-800 r / min for 5-10 minutes and then ultrasonically disperse at 500-1500 WKW and 500-1000 r / min for 5-10 minutes to obtain semi-finished product A; S03, the curing agent and the pH adjusting agent are first mixed and stirred at 300-500r / min for 5-10 minutes, and then the film-forming agent and the filler are added, and the mixture is fully stirred at 200-800r / min for 5-10 minutes, and then ultrasonically diffused at 500-1500WKW and a speed of 500-1000r / min for 5-10 minutes to obtain the semi-finished product B; S04, semi-finished product A and semi-finished product B are mixed in a weight ratio of 1:1, stirred thoroughly for 1-2 minutes, and then evenly coated on the surface of marine operating equipment by brushing or spraying, with a thickness of 20-100μm. After curing at room temperature for 1-2 hours, the IPNs anti-corrosion and antibacterial coating in the marine environment is obtained.

10. The use of an IPNs anti-corrosion and antibacterial coating in marine environment in marine operating equipment according to any one of claims 1 to 8, characterized in that: Marine operation equipment includes ships, anchor chains, drilling equipment, instruments and equipment, and aquaculture cages.