Water-based ceramic coating and preparation method thereof

Abstract

The invention relates to the technical field of water-based ceramic coatings, and discloses a water-based ceramic coating, which is prepared from the following ingredients including 30 to 40 parts of ceramic slurry, 1 to 3 parts of organic silicon modified acrylic resin, 10 to 20 parts of ethidene diamine, 5 to 10 parts of siloxane monomers, 15 to 20 parts of water-soluble resin, 15 to 25 parts of deionized water, 1 to 3 parts of flatting agents, 2 to 5 parts of auxiliary agents, 5 to 15 parts of high-temperature-resistant pigments and the balance of water. According to the water-based ceramic coating and the preparation method thereof, the ethylenediamine, the siloxane monomer and the water-soluble resin are added into the ceramic coating, so that the adsorption capacity of the coating to a base material can be improved, the phenomenon that the coating falls off is avoided, and meanwhile, the phenomenon that the coating is decolored under long-time exposure can be effectively avoided by adopting the high-temperature-resistant pigment; the organic silicon modified acrylic resin with a flexible chain segment is introduced into the ceramic slurry to form a coating with a flexible structure, so that the phenomenon of cracking of the coating is avoided, and the service life of the water-based ceramic coating is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of water-based ceramic coatings, in particular to a water-based ceramic coating and a preparation method thereof. Background Art

[0002] Ceramic coatings are a new type of coating material based on organic and inorganic hybrid technology. Because its main structure is a covalently cross-linked inorganic (metal oxide, non-metal oxide, etc.) network, it has many performance advantages that traditional organic coatings cannot match, such as high hardness, friction resistance, flame retardancy, super weather resistance, low surface energy, and chemical solvent resistance. It is an excellent choice for preparing high-temperature resistance and high-durability special coatings. Ceramic coatings are called ceramic coatings because their performance after curing is similar to that of ceramic materials. Nano water-based ceramic coatings have been widely used in various industrial fields based on their excellent comprehensive performance and green environmental protection and energy-saving advantages, and can provide good protection and decorative effects. Silicone ceramic coatings are currently a commonly used ceramic coating. The coating formed has the advantages of high hardness, good weather resistance, safety and non-toxicity.

[0003] For example, the patent with publication number CN115232492A discloses a water-based phosphate ceramic coating suitable for anti-oxidation protection of metal surfaces. The coating is a water-based, single-component, baked and dried product, which is composed of a modified phosphate base material, a heat-resistant pigment, a filler, an additive, and water. Its preparation process is simple and the construction is convenient. After curing, the coating has extremely low surface roughness, excellent hardness and wear resistance, and can withstand high temperatures above 600°C. It can be used as high-temperature oxidation protection and corrosion protection for metal surfaces.

[0004] The existing water-based ceramic coatings are used in outdoor environments, and the coating surface is cracked due to the erosion of ultraviolet rays and water vapor and salt. It also leads to low adhesion to the substrate surface and easy to fall off. Therefore, a water-based ceramic coating and a preparation method thereof are proposed to solve the above problems. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides a water-based ceramic coating and a preparation method thereof.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the present invention provides the following technical solution: a water-based ceramic coating, composed of the following ingredients: 30 to 40 parts of ceramic slurry, 1 to 3 parts of silicone-modified acrylic resin, 10 to 20 parts of ethylenediamine, 5 to 10 parts of siloxane monomer, 15 to 20 parts of water-soluble resin, 15 to 25 parts of deionized water, 1 to 3 parts of leveling agent, 2 to 5 parts of additives and 5 to 15 parts of high temperature resistant pigment, and the rest is water.

[0009] The preparation method of the ceramic slurry is as follows:

[0010] S1. Select spherical ceramic powders with a particle size continuously distributed in the range of 0.1-20 μm, put the spherical ceramic powders into a deoxygenated reactor, add polyethylene glycol, polycarbonate diol and neopentyl glycol, raise the temperature to 100-120° C., and perform decompression dehydration;

[0011] S2, stirring the material and adding ionized water, adjusting the pH value of the reaction solution, and after the reaction, putting it into a ball mill for grinding for 2-3 hours to prepare a ceramic aqueous slurry;

[0012] S3, stirring the prepared ceramic aqueous slurry, and adding carboxymethyl-β-cyclodextrin and 1-hydroxybenzotriazole, after stirring, adjusting the pH value of the mixed solution to alkaline, and continuing to stir to obtain a ceramic slurry.

[0013] Preferably, the auxiliary agent is one or a combination of a dispersant, a wetting agent, a defoaming agent, a hydrophobic agent, and a capping agent.

[0014] Preferably, the high temperature resistant pigment is an inorganic pigment, and the water-soluble resin is one or a combination of acrylic resin, alkyd resin, acrylic silicone resin, epoxy acrylic resin and melamine resin.

[0015] Preferably, the siloxane monomer is selected from at least one of methyltrimethoxysilane, propyltrimethoxysilane and phenyltrimethoxysilane.

[0016] A method for preparing a water-based ceramic coating comprises the following steps:

[0017] S1. Use weighing equipment to weigh ceramic slurry, silicone-modified acrylic resin, ethylenediamine, siloxane monomer, water-soluble resin, deionized water, leveling agent, additives and high-temperature resistant pigment, and place the weighed raw materials for later use.

[0018] S2. Heat and stir water, ethylenediamine, siloxane monomer, water-soluble resin, deionized water, leveling agent, additives and high-temperature resistant pigments through a stirring device, and disperse them at high speed under stirring until they are uniform, free of powder lumps and agglomerates; then transfer them to a grinding device and grind them until the slurry fineness is less than 20μm.

[0019] S3, adding ceramic slurry and silicone-modified acrylic resin to the slurry obtained in step S1, stirring evenly, adding a thickener to adjust the viscosity of the system, and then filtering to obtain a water-based ceramic coating.

[0020] Preferably, the organosilicon-modified acrylic resin is selected from at least one of organosilicon-modified hydroxyethyl acrylate and organosilicon-modified hydroxyethyl methacrylate.

[0021] Preferably, the heating and stirring temperature of S2 is 65-100° C., and the reaction time is 30-180 min.

[0022] Preferably, the stirring speed in S3 is 800-1000 r / min.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention provides a water-based ceramic coating and a preparation method thereof, which has the following beneficial effects:

[0025] 1. A water-based ceramic coating and a preparation method thereof, by introducing a silicone-modified acrylic resin with a flexible chain segment into a ceramic slurry, a coating with a flexible structure is formed, thereby improving the flexibility of the nano-ceramic coating, making it more widely applicable to different substrate surfaces after curing, avoiding the generation of coating cracks, thereby avoiding the phenomenon of cracking of the coating, and improving the service life of the water-based ceramic coating.

[0026] 2. This water-based ceramic coating and its preparation method can improve the adsorption of the coating to the substrate by adding ethylenediamine, siloxane monomer and water-soluble resin to the ceramic coating, thereby avoiding the phenomenon of coating shedding. At the same time, the use of high-temperature resistant pigments can effectively avoid the discoloration of the coating under long-term exposure to the sun, further improving the practicality of the water-based ceramic coating. DETAILED DESCRIPTION

[0027] The following will be combined with 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.

[0028] Embodiment 1:

[0029] A water-based ceramic coating is composed of the following ingredients: 30 parts of ceramic slurry, 2 parts of silicone-modified acrylic resin, 10 parts of ethylenediamine, 7 parts of siloxane monomer, 15 parts of water-soluble resin, 15 parts of deionized water, 1 part of leveling agent, 2 parts of auxiliary agent and 5 parts of high-temperature resistant pigment, and the rest is water.

[0030] The preparation method of the ceramic slurry is as follows:

[0031] S1. Select spherical ceramic powders with a particle size continuously distributed in the range of 0.1-20 μm, put the spherical ceramic powders into a deoxygenated reactor, add polyethylene glycol, polycarbonate diol and neopentyl glycol, raise the temperature to 100-120° C., and perform decompression dehydration;

[0032] S2, stirring the material and adding ionized water, adjusting the pH value of the reaction solution, and after the reaction, putting it into a ball mill for grinding for 2-3 hours to prepare a ceramic aqueous slurry;

[0033] S3, stirring the prepared ceramic aqueous slurry, and adding carboxymethyl-β-cyclodextrin and 1-hydroxybenzotriazole, after stirring, adjusting the pH value of the mixed solution to alkaline, and continuing to stir to obtain a ceramic slurry.

[0034] The auxiliary agent is one or a combination of dispersants, wetting agents, defoamers, hydrophobic agents and capping agents.

[0035] The high temperature resistant pigment is an inorganic pigment, and the water soluble resin is one or a combination of acrylic resin, alkyd resin, acrylic silicone resin, epoxy acrylic resin and melamine resin.

[0036] The siloxane monomer is selected from at least one of methyltrimethoxysilane, propyltrimethoxysilane and phenyltrimethoxysilane.

[0037] The organosilicon-modified acrylic resin is selected from at least one of organosilicon-modified hydroxyethyl acrylate and organosilicon-modified hydroxyethyl methacrylate.

[0038] A method for preparing a water-based ceramic coating comprises the following steps:

[0039] S1. Use weighing equipment to weigh ceramic slurry, silicone-modified acrylic resin, ethylenediamine, siloxane monomer, water-soluble resin, deionized water, leveling agent, additives and high-temperature resistant pigment, and place the weighed raw materials for later use.

[0040] S2. Heat and stir water, ethylenediamine, siloxane monomer, water-soluble resin, deionized water, leveling agent, additives and high-temperature resistant pigments through a stirring device at a temperature of 65-100°C for 30-180 minutes. Disperse at high speed under stirring until uniform, without powder lumps or lumps; then transfer to a grinding device for grinding until the slurry fineness is less than 20 μm.

[0041] S3, adding ceramic slurry and silicone-modified acrylic resin to the slurry obtained in step S1, stirring evenly, with a stirring speed of 800-1000 r / min, adding a thickener to adjust the viscosity of the system, and then filtering to obtain a water-based ceramic coating.

[0042] Embodiment 2:

[0043] A water-based ceramic coating is composed of the following ingredients: 35 parts of ceramic slurry, 3 parts of silicone-modified acrylic resin, 20 parts of ethylenediamine, 10 parts of siloxane monomer, 18 parts of water-soluble resin, 20 parts of deionized water, 3 parts of leveling agent, 4 parts of auxiliary agent and 14 parts of high-temperature resistant pigment, and the rest is water.

[0044] The preparation method of the ceramic slurry is as follows:

[0045] S1. Select spherical ceramic powders with a particle size continuously distributed in the range of 0.1-20 μm, put the spherical ceramic powders into a deoxygenated reactor, add polyethylene glycol, polycarbonate diol and neopentyl glycol, raise the temperature to 100-120° C., and perform decompression dehydration;

[0046] S2, stirring the material and adding ionized water, adjusting the pH value of the reaction solution, and after the reaction, putting it into a ball mill for grinding for 2-3 hours to prepare a ceramic aqueous slurry;

[0047] S3, stirring the prepared ceramic aqueous slurry, and adding carboxymethyl-β-cyclodextrin and 1-hydroxybenzotriazole, after stirring, adjusting the pH value of the mixed solution to alkaline, and continuing to stir to obtain a ceramic slurry.

[0048] The auxiliary agent is one or a combination of dispersants, wetting agents, defoamers, hydrophobic agents and capping agents.

[0049] The high temperature resistant pigment is an inorganic pigment, and the water soluble resin is one or a combination of acrylic resin, alkyd resin, acrylic silicone resin, epoxy acrylic resin and melamine resin.

[0050] The siloxane monomer is selected from at least one of methyltrimethoxysilane, propyltrimethoxysilane and phenyltrimethoxysilane.

[0051] The organosilicon-modified acrylic resin is selected from at least one of organosilicon-modified hydroxyethyl acrylate and organosilicon-modified hydroxyethyl methacrylate.

[0052] A method for preparing a water-based ceramic coating comprises the following steps:

[0053] S1. Use weighing equipment to weigh ceramic slurry, silicone-modified acrylic resin, ethylenediamine, siloxane monomer, water-soluble resin, deionized water, leveling agent, additives and high-temperature resistant pigment, and place the weighed raw materials for later use.

[0054] S2. Heat and stir water, ethylenediamine, siloxane monomer, water-soluble resin, deionized water, leveling agent, additives and high-temperature resistant pigments through a stirring device at a temperature of 65-100°C for 30-180 minutes. Disperse at high speed under stirring until uniform, without powder lumps or lumps; then transfer to a grinding device for grinding until the slurry fineness is less than 20 μm.

[0055] S3, adding ceramic slurry and silicone-modified acrylic resin to the slurry obtained in step S1, stirring evenly, with a stirring speed of 800-1000 r / min, adding a thickener to adjust the viscosity of the system, and then filtering to obtain a water-based ceramic coating.

[0056] Embodiment three:

[0057] A water-based ceramic coating is composed of the following ingredients: 40 parts of ceramic slurry, 3 parts of silicone-modified acrylic resin, 18 parts of ethylenediamine, 10 parts of siloxane monomer, 20 parts of water-soluble resin, 25 parts of deionized water, 3 parts of leveling agent, 5 parts of auxiliary agent and 15 parts of high-temperature resistant pigment, and the rest is water.

[0058] The preparation method of the ceramic slurry is as follows:

[0059] S1. Select spherical ceramic powders with a particle size continuously distributed in the range of 0.1-20 μm, put the spherical ceramic powders into a deoxygenated reactor, add polyethylene glycol, polycarbonate diol and neopentyl glycol, raise the temperature to 100-120° C., and perform decompression dehydration;

[0060] S2, stirring the material and adding ionized water, adjusting the pH value of the reaction solution, and after the reaction, putting it into a ball mill for grinding for 2-3 hours to prepare a ceramic aqueous slurry;

[0061] S3, stirring the prepared ceramic aqueous slurry, and adding carboxymethyl-β-cyclodextrin and 1-hydroxybenzotriazole, after stirring, adjusting the pH value of the mixed solution to alkaline, and continuing to stir to obtain a ceramic slurry.

[0062] The auxiliary agent is one or a combination of dispersants, wetting agents, defoamers, hydrophobic agents and capping agents.

[0063] The high temperature resistant pigment is an inorganic pigment, and the water soluble resin is one or a combination of acrylic resin, alkyd resin, acrylic silicone resin, epoxy acrylic resin and melamine resin.

[0064] The siloxane monomer is selected from at least one of methyltrimethoxysilane, propyltrimethoxysilane and phenyltrimethoxysilane.

[0065] The organosilicon-modified acrylic resin is selected from at least one of organosilicon-modified hydroxyethyl acrylate and organosilicon-modified hydroxyethyl methacrylate.

[0066] A method for preparing a water-based ceramic coating comprises the following steps:

[0067] S1. Use weighing equipment to weigh ceramic slurry, silicone-modified acrylic resin, ethylenediamine, siloxane monomer, water-soluble resin, deionized water, leveling agent, additives and high-temperature resistant pigment, and place the weighed raw materials for later use.

[0068] S2. Heat and stir water, ethylenediamine, siloxane monomer, water-soluble resin, deionized water, leveling agent, additives and high-temperature resistant pigments through a stirring device at a temperature of 65-100°C for 30-180 minutes. Disperse at high speed under stirring until uniform, without powder lumps or lumps; then transfer to a grinding device for grinding until the slurry fineness is less than 20 μm.

[0069] S3, adding ceramic slurry and silicone-modified acrylic resin to the slurry obtained in step S1, stirring evenly, with a stirring speed of 800-1000 r / min, adding a thickener to adjust the viscosity of the system, and then filtering to obtain a water-based ceramic coating.

[0070] By introducing silicone-modified acrylic resin with flexible chain segments into ceramic slurry, a coating with a flexible structure is formed, thereby improving the flexibility of the nano-ceramic coating and making it more widely applicable to different substrate surfaces after curing, avoiding the generation of cracks in the coating, thereby avoiding the phenomenon of cracking of the coating and improving the service life of the water-based ceramic coating; by adding ethylenediamine, siloxane monomer and water-soluble resin to the ceramic coating, the adsorption capacity of the coating on the substrate can be improved, avoiding the phenomenon of coating shedding, and the use of high temperature resistant pigments can effectively avoid the discoloration of the coating under long-term exposure to the sun, further improving the practicality of the water-based ceramic coating.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated 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 that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water-based ceramic coating, It is characterized in that The invention is composed of the following ingredients: 30-40 parts of ceramic slurry, 1-3 parts of organosilicon-modified acrylic resin, 10-20 parts of ethylenediamine, 5-10 parts of siloxane monomer, 15-20 parts of water-soluble resin, 15-25 parts of deionized water, 1-3 parts of leveling agent, 2-5 parts of auxiliary agent and 5-15 parts of high temperature resistant pigment, and the rest is water; The preparation method of the ceramic slurry is as follows: S1. Select spherical ceramic powders with a particle size continuously distributed in the range of 0.1-20 μm, put the spherical ceramic powders into a deoxygenated reactor, add polyethylene glycol, polycarbonate diol and neopentyl glycol, raise the temperature to 100-120° C., and perform decompression dehydration; S2, stirring the material and adding ionized water, adjusting the pH value of the reaction solution, and after the reaction, putting it into a ball mill for grinding for 2-3 hours to prepare a ceramic aqueous slurry; S3, stirring the prepared ceramic aqueous slurry, and adding carboxymethyl-β-cyclodextrin and 1-hydroxybenzotriazole, after stirring, adjusting the pH value of the mixed solution to alkaline, and continuing to stir to obtain a ceramic slurry.

2. A water-based ceramic coating according to claim 1, It is characterized in that The auxiliary agent is one or a combination of a dispersant, a wetting agent, a defoaming agent, a hydrophobic agent, and a capping agent.

3. A water-based ceramic coating according to claim 1, It is characterized in that The high temperature resistant pigment is an inorganic pigment, and the water soluble resin is one or a combination of acrylic resin, alkyd resin, acrylic silicone resin, epoxy acrylic resin and melamine resin.

4. A water-based ceramic coating according to claim 1, It is characterized in that The siloxane monomer is selected from at least one of methyltrimethoxysilane, propyltrimethoxysilane and phenyltrimethoxysilane.

5. A method for preparing a water-based ceramic coating, It is characterized in that The following steps are involved: S1. Use a weighing device to weigh ceramic slurry, silicone-modified acrylic resin, ethylenediamine, siloxane monomer, water-soluble resin, deionized water, leveling agent, additives and high-temperature resistant pigment, and place the weighed raw materials for standby use; S2, heating and stirring water, ethylenediamine, siloxane monomer, water-soluble resin, deionized water, leveling agent, additives and high temperature resistant pigment by a stirring device, dispersing them at high speed until they are uniform, free of powder lumps and agglomerates; then transferring them to a grinding device, grinding them until the slurry fineness is less than 20 μm; S3, adding ceramic slurry and silicone-modified acrylic resin to the slurry obtained in step S1, stirring evenly, adding a thickener to adjust the viscosity of the system, and then filtering to obtain a water-based ceramic coating.

6. A method for preparing a water-based ceramic coating according to claim 5, It is characterized in that The organosilicon-modified acrylic resin is selected from at least one of organosilicon-modified hydroxyethyl acrylate and organosilicon-modified hydroxyethyl methacrylate.

7. The method for preparing a water-based ceramic coating according to claim 5, It is characterized in that The temperature of heating and stirring S2 is 65-100°C, and the reaction time is 30-180min.

8. The method for preparing a water-based ceramic coating according to claim 5, It is characterized in that The stirring speed in S3 is 800-1000 r / min.