Antifouling corrosion-resistant water-based paint and preparation process thereof

Abstract

The antifouling and corrosion-resistant water-based paint comprises the following components in percentage by weight: 30-50% of water-based organic silicon modified acrylic resin, 5-10% of nano cerium oxide, 5-10% of zinc oxide, 5-10% of concentrated slurry, 5-10% of a curing agent, 5-10% of a catalyst, 5-10% of a leveling agent, 5-10% of a defoaming agent and the balance of deionized water. The coating comprises the following components in percentage by weight: 2-6% of zinc oxide, 1-3% of concentrated slurry, 2-4% of a curing agent, 0.1-0.5% of a catalyst, 0.1-0.9% of a flatting agent, 0.1-0.5% of a defoaming agent and the balance of deionized water. The anti-fouling paint has the beneficial effects that the paint has excellent anti-fouling performance, and the surface of the coating can be kept clean for a long time; the corrosion resistance of the coating is remarkably improved, and a good protection effect can be kept in a severe environment; the coating is uniform in dispersed phase, moderate in particle size, good in storage stability and easy to construct; the coating is moderate in curing temperature, uniform in leveling, excellent in adhesive force and excellent in solvent resistance, acid and alkali corrosion resistance and neutral salt mist resistance; the preparation process is simple, stable and efficient, and industrial production is easy to realize.

Description

Technical Field

[0001] The invention belongs to the technical field of water-based coatings, and in particular relates to an anti-fouling and corrosion-resistant water-based coating and a preparation process thereof. Background Art

[0002] Water-based paint is a paint that uses water as a solvent or dispersion medium. It is a relatively new type of paint on the paint market, including water-soluble paint, water-dilutable paint, and water-dispersible paint. Water-based paint uses water-soluble resins as film-forming materials, represented by polyvinyl alcohol and its various modifications. In addition, there are water-soluble alkyd resins, water-soluble epoxy resins, and inorganic polymer water-based resins. Water-based paint has excellent non-stickiness and durability.

[0003] The patent discloses an antifouling water-based coating with the publication number CN108034343A. The coating is made of the following raw materials in parts by weight: 40-70 parts of alkyd resin, 15-40 parts of fluorocarbon resin, 10-40 parts of hydroxy acrylic resin, 15-35 parts of silicone acrylic emulsion, 10-25 parts of isophorone, 1-4 parts of xylene, 2-5 parts of ethylene glycol ethyl ether, 1-4 parts of butyl triphenyl phosphine fluoride, 1-2 parts of ester-modified siloxane, 0.5-1.5 parts of sodium tetrapolyphosphate, 5-12 parts of nano titanium dioxide, 20-35 parts of chlorinated paraffin, 15-25 parts of rosin, 10-15 parts of cuprous oxide, 10-20 parts of organic silica gel, and 60-100 parts of water.

[0004] The disclosure discloses a highly corrosion-resistant water-based paint for color-coated plates with a publication number of CN111925715A and a preparation method thereof. The patent discloses that the paint is prepared by mixing the following raw materials in weight percentage: 30% to 50% of graphene oxide-modified water-based epoxy resin, 5% to 20% of acrylic emulsion, 5% to 10% of nano-silica sol, 20% to 40% of water-based color paste, 0.1% to 1% of wetting agent, 0.1% to 1% of leveling agent, and 5% to 20% of water, wherein the sum of the weight percentages of the above raw materials is 100%. The preparation method comprises the following steps: mixing the graphene oxide-modified water-based epoxy resin, acrylic emulsion, water-based color paste and water, dispersing the mixture at a speed of 1800 to 2500 r / min for 20 to 45 minutes, grinding the mixture to a fineness of ≤10 microns, then sequentially adding the nano-silica sol, the wetting agent and the leveling agent, and stirring the mixture at 500 to 800 r / min for 15 to 30 minutes to obtain the water-based paint for color-coated plates.

[0005] Traditional water-based coatings still have shortcomings in terms of anti-fouling and corrosion resistance. Especially in harsh environments, the durability of the coating often fails to meet actual needs. Summary of the invention

[0006] The purpose of the present invention is to provide an antifouling and corrosion-resistant water-based coating and a preparation process, which can significantly improve the density, corrosion resistance and antifouling performance of the coating.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an anti-fouling and corrosion-resistant water-based coating, comprising a water-based organosilicon-modified acrylic resin, nano-cerium oxide, zinc oxide, concentrated slurry, a curing agent, a catalyst, a leveling agent, a defoaming agent, and deionized water, wherein the components are calculated by weight percentage: 30-50% of water-based organosilicon-modified acrylic resin, 5-10% of nano-cerium oxide, 2-6% of zinc oxide, 1-3% of concentrated slurry, 2-4% of curing agent, 0.1-0.5% of catalyst, 0.1-0.9% of leveling agent, 0.1-0.5% of defoaming agent, and the balance is deionized water.

[0008] As a preferred technical solution of the present invention, the curing agent is fully methylated amino resin.

[0009] As a preferred technical solution of the present invention, the catalyst is p-toluenesulfonic acid.

[0010] As a preferred technical solution of the present invention, the leveling agent is organically modified polydimethylsiloxane.

[0011] As a preferred technical solution of the present invention, the defoaming agent is one of polysiloxane and polyethylene glycol.

[0012] As a preferred technical solution of the present invention, the concentrated pulp is a nano-carbon concentrated pulp.

[0013] The present invention also discloses a preparation process of an antifouling and corrosion-resistant water-based coating, comprising the following steps:

[0014] Mix water-based organosilicon-modified acrylic resin, nano-cerium oxide, zinc oxide and concentrated pulp, add deionized water, and disperse at a speed of 1500-2500 r / min for 15-30 minutes to obtain a pre-dispersion liquid;

[0015] The pre-dispersed liquid is fed into a grinder and ground to obtain a grinding liquid;

[0016] Add curing agent, catalyst, leveling agent and defoaming agent to the grinding liquid, stir at a speed of 500-800r / min for 15-30min to obtain a uniform coating.

[0017] As a preferred technical solution of the present invention, the fine particle size is controlled to be ≤10um during grinding.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The coating of the present invention has excellent antifouling performance and can keep the coating surface clean for a long time;

[0020] The corrosion resistance of the coating is significantly improved, and it can maintain good protection effect in harsh environments;

[0021] The coating has uniform dispersion phase, moderate particle size, good storage stability and is easy to apply;

[0022] The coating has moderate curing temperature, uniform leveling, excellent adhesion, and excellent resistance to solvents, acid and alkali corrosion, and neutral salt spray;

[0023] The preparation process of the invention is simple, stable and efficient and can be easily industrialized. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flow chart of the preparation process of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1

[0027] See also Figure 1 , which is the first embodiment of the present invention, provides an anti-fouling and corrosion-resistant water-based coating, including water-based silicone-modified acrylic resin, nano-cerium oxide, zinc oxide, concentrated slurry, curing agent, catalyst, leveling agent, defoaming agent, and deionized water, wherein the components are calculated by weight percentage: 30% water-based silicone-modified acrylic resin, 5% nano-cerium oxide, 2% zinc oxide, 1% concentrated slurry, 2% curing agent, 0.1% catalyst, 0.1% leveling agent, 0.1% defoaming agent, and the balance is deionized water; the curing agent is fully methylated amino resin; the catalyst is p-toluenesulfonic acid; the leveling agent is organically modified polydimethylsiloxane; the defoaming agent is polysiloxane; the concentrated slurry is a nano-carbon concentrated slurry.

[0028] The preparation method of water-based silicone-modified acrylic resin comprises the following steps:

[0029] Stirring and mixing each reaction monomer (including alkyl acrylate, aminoalkyl acrylate, unsaturated silicone monomer) and initiator and completely dissolving them; wherein the amount of initiator added is 0.8% of the total weight of the reaction monomer;

[0030] Raise the temperature of the organic co-solvent (such as isopropanol, n-butanol, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether) to 90°C;

[0031] Polymerization reaction: add the premixed raw materials dropwise into the organic co-solvent to carry out polymerization reaction, and keep warm for 1.5 hours. The amount of organic co-solvent added is 20% of the reaction monomer; continue to add initiator, and the amount of initiator added is 0.08% of the total weight of the reaction monomer; add organic acid (such as acetic acid, propionic acid, butyric acid, lactic acid) for neutralization; remove excess organic co-solvent; finally add deionized water, the amount added is 15% of the total weight of the reaction monomer, and obtain water-based silicone modified acrylic resin.

[0032] Nano-cerium oxide and zinc oxide are added as fillers to waterborne polyurethane or waterborne epoxy to improve the density of the coating. Cerium oxide can also be used as a corrosion inhibitor to improve the corrosion resistance of the coating. In addition, the antifouling activity of haloperoxide enzymes of nano-cerium oxide and the photocatalytic activity of zinc oxide will improve the antifouling performance of waterborne coatings. Nano-carbon concentrated slurry has good dispersibility and compatibility in polyurethane coatings.

[0033] A preparation process of an antifouling and corrosion-resistant water-based coating comprises the following steps:

[0034] The water-based silicone-modified acrylic resin, nano-cerium oxide, zinc oxide and concentrated pulp were mixed, deionized water was added, and the mixture was dispersed at a speed of 1500 r / min for 30 minutes to obtain a pre-dispersion liquid;

[0035] The pre-dispersed liquid is fed into a grinder for grinding, and the fine particle size is controlled to be ≤10um during grinding to obtain a grinding liquid;

[0036] Add curing agent, catalyst, leveling agent and defoaming agent to the grinding liquid, stir at a speed of 500r / min for 30min to obtain a uniform coating.

[0037] The preparation process of the present invention is simple, stable, and efficient, and can be easily industrialized.

[0038] The prepared coating has uniform dispersed phase, moderate particle size, good storage stability and is easy to apply;

[0039] The coating has excellent antifouling and corrosion resistance, and can meet the protection needs of various metal and non-metal surfaces;

[0040] The coating has moderate curing temperature, uniform leveling, excellent adhesion, and excellent resistance to solvents, acid and alkali corrosion, and neutral salt spray.

[0041] Example 2

[0042] See also Figure 1, which is the second embodiment of the present invention, provides an anti-fouling and corrosion-resistant water-based coating, including water-based silicone-modified acrylic resin, nano-cerium oxide, zinc oxide, concentrated slurry, curing agent, catalyst, leveling agent, defoaming agent, and deionized water, wherein the components are calculated by weight percentage: 40% water-based silicone-modified acrylic resin, 8% nano-cerium oxide, 4% zinc oxide, 2% concentrated slurry, 3% curing agent, 0.3% catalyst, 0.5% leveling agent, 0.3% defoaming agent, and the balance is deionized water; the curing agent is fully methylated amino resin; the catalyst is p-toluenesulfonic acid; the leveling agent is organically modified polydimethylsiloxane; the defoaming agent is polyethylene glycol; and the concentrated slurry is a nano-carbon concentrated slurry.

[0043] The preparation method of water-based silicone-modified acrylic resin comprises the following steps:

[0044] Stirring and mixing each reaction monomer (including alkyl acrylate, aminoalkyl acrylate, unsaturated silicone monomer) and initiator and completely dissolving them; wherein the amount of initiator added is 0.8% of the total weight of the reaction monomer;

[0045] Raise the temperature of the organic co-solvent (such as isopropanol, n-butanol, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether) to 90°C;

[0046] Polymerization reaction: add the premixed raw materials dropwise into the organic co-solvent to carry out polymerization reaction, and keep warm for 1.5 hours. The amount of organic co-solvent added is 20% of the reaction monomer; continue to add initiator, and the amount of initiator added is 0.08% of the total weight of the reaction monomer; add organic acid (such as acetic acid, propionic acid, butyric acid, lactic acid) for neutralization; remove excess organic co-solvent; finally add deionized water, the amount added is 15% of the total weight of the reaction monomer, and obtain water-based silicone modified acrylic resin.

[0047] Nano-cerium oxide and zinc oxide are added as fillers to waterborne polyurethane or waterborne epoxy to improve the density of the coating. Cerium oxide can also be used as a corrosion inhibitor to improve the corrosion resistance of the coating. In addition, the antifouling activity of haloperoxide enzymes of nano-cerium oxide and the photocatalytic activity of zinc oxide will improve the antifouling performance of waterborne coatings. Nano-carbon concentrated slurry has good dispersibility and compatibility in polyurethane coatings.

[0048] A preparation process of an antifouling and corrosion-resistant water-based coating comprises the following steps:

[0049] The water-based silicone modified acrylic resin, nano-cerium oxide, zinc oxide and concentrated pulp were mixed, and deionized water was added, and the mixture was dispersed at a speed of 2000 r / min for 22 minutes to obtain a pre-dispersion liquid;

[0050] The pre-dispersed liquid is fed into a grinder for grinding, and the fine particle size is controlled to be ≤10um during grinding to obtain a grinding liquid;

[0051] Add curing agent, catalyst, leveling agent and defoaming agent to the grinding liquid, stir at a speed of 650r / min for 22min to obtain a uniform coating.

[0052] The preparation process of the present invention is simple, stable, and efficient, and can be easily industrialized.

[0053] The prepared coating has uniform dispersed phase, moderate particle size, good storage stability and is easy to apply;

[0054] The coating has excellent antifouling and corrosion resistance, and can meet the protection needs of various metal and non-metal surfaces;

[0055] The coating has moderate curing temperature, uniform leveling, excellent adhesion, and excellent resistance to solvents, acid and alkali corrosion, and neutral salt spray.

[0056] Example 3

[0057] See also Figure 1 , which is the third embodiment of the present invention, provides an anti-fouling and corrosion-resistant water-based coating, including water-based silicone-modified acrylic resin, nano-cerium oxide, zinc oxide, concentrated slurry, curing agent, catalyst, leveling agent, defoaming agent, and deionized water, wherein the components are calculated by weight percentage: 50% water-based silicone-modified acrylic resin, 10% nano-cerium oxide, 6% zinc oxide, 3% concentrated slurry, 4% curing agent, 0.5% catalyst, 0.9% leveling agent, 0.5% defoaming agent, and the balance is deionized water; the curing agent is fully methylated amino resin; the catalyst is p-toluenesulfonic acid; the leveling agent is organically modified polydimethylsiloxane; the defoaming agent is polysiloxane; the concentrated slurry is a nano-carbon concentrated slurry.

[0058] The preparation method of water-based silicone-modified acrylic resin comprises the following steps:

[0059] Stirring and mixing each reaction monomer (including alkyl acrylate, aminoalkyl acrylate, unsaturated silicone monomer) and initiator and completely dissolving them; wherein the amount of initiator added is 0.8% of the total weight of the reaction monomer;

[0060] Raise the temperature of the organic co-solvent (such as isopropanol, n-butanol, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether) to 90°C;

[0061] Polymerization reaction: add the premixed raw materials dropwise into the organic co-solvent to carry out polymerization reaction, and keep warm for 1.5 hours. The amount of organic co-solvent added is 20% of the reaction monomer; continue to add initiator, and the amount of initiator added is 0.08% of the total weight of the reaction monomer; add organic acid (such as acetic acid, propionic acid, butyric acid, lactic acid) for neutralization; remove excess organic co-solvent; finally add deionized water, the amount added is 15% of the total weight of the reaction monomer, and obtain water-based silicone modified acrylic resin.

[0062] Nano-cerium oxide and zinc oxide are added as fillers to waterborne polyurethane or waterborne epoxy to improve the density of the coating. Cerium oxide can also be used as a corrosion inhibitor to improve the corrosion resistance of the coating. In addition, the antifouling activity of haloperoxide enzymes of nano-cerium oxide and the photocatalytic activity of zinc oxide will improve the antifouling performance of waterborne coatings. Nano-carbon concentrated slurry has good dispersibility and compatibility in polyurethane coatings.

[0063] A preparation process of an antifouling and corrosion-resistant water-based coating comprises the following steps:

[0064] The water-based silicone modified acrylic resin, nano-cerium oxide, zinc oxide and concentrated pulp were mixed, and deionized water was added, and the mixture was dispersed at a speed of 2500 r / min for 15 minutes to obtain a pre-dispersion liquid;

[0065] The pre-dispersed liquid is fed into a grinder for grinding, and the fine particle size is controlled to be ≤10um during grinding to obtain a grinding liquid;

[0066] Add curing agent, catalyst, leveling agent and defoaming agent to the grinding liquid, stir at a speed of 800r / min for 15min to obtain a uniform coating.

[0067] The preparation process of the present invention is simple, stable, and efficient, and can be easily industrialized.

[0068] The prepared coating has uniform dispersed phase, moderate particle size, good storage stability and is easy to apply;

[0069] The coating has excellent antifouling and corrosion resistance, and can meet the protection needs of various metal and non-metal surfaces;

[0070] The coating has moderate curing temperature, uniform leveling, excellent adhesion, and excellent resistance to solvents, acid and alkali corrosion, and neutral salt spray.

[0071] Experimental verification:

[0072]

[0073]

[0074] Although the embodiments of the present invention have been shown and described, as detailed above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An antifouling and corrosion-resistant water-based paint, characterized in that: The invention comprises water-based organosilicon-modified acrylic resin, nano-cerium oxide, zinc oxide, concentrated slurry, curing agent, catalyst, leveling agent, defoaming agent and deionized water, and the components are calculated by weight percentage as follows: 30-50% water-based organosilicon-modified acrylic resin, 5-10% nano-cerium oxide, 2-6% zinc oxide, 1-3% concentrated slurry, 2-4% curing agent, 0.1-0.5% catalyst, 0.1-0.9% leveling agent, 0.1-0.5% defoaming agent and the balance is deionized water.

2. The antifouling and corrosion-resistant water-based paint according to claim 1, characterized in that: The curing agent is fully methyl etherified amino resin.

3. The antifouling and corrosion-resistant water-based paint according to claim 1, characterized in that: The catalyst is p-toluenesulfonic acid.

4. The antifouling and corrosion-resistant water-based paint according to claim 1, characterized in that: The leveling agent is organically modified polydimethylsiloxane.

5. The antifouling and corrosion-resistant water-based paint according to claim 1, characterized in that: The defoaming agent is one of polysiloxane and polyethylene glycol.

6. The antifouling and corrosion-resistant water-based paint according to claim 1, characterized in that: The concentrated pulp is a nano-carbon concentrated pulp.

7. A process for preparing an antifouling and corrosion-resistant water-based coating according to any one of claims 1 to 6, characterized in that: The steps include: Mix water-based organosilicon-modified acrylic resin, nano-cerium oxide, zinc oxide and concentrated pulp, add deionized water, and disperse at a speed of 1500-2500 r / min for 15-30 minutes to obtain a pre-dispersion liquid; The pre-dispersed liquid is fed into a grinder and ground to obtain a grinding liquid; Add curing agent, catalyst, leveling agent and defoaming agent to the grinding liquid, stir at a speed of 500-800r / min for 15-30min to obtain a uniform coating.

8. The process for preparing the antifouling and corrosion-resistant water-based coating according to claim 7, characterized in that: When grinding, control the fine particle size to ≤10um.

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