Wear-resistant epoxy ceramic coating and preparation method thereof

Abstract

The invention relates to the technical field of coatings, in particular to a wear-resistant epoxy ceramic coating which is characterized by comprising a component A and a component B according to the mass ratio of 5: 1, the component A comprises, by mass, 40% of epoxy resin, 46.5% of a ceramic powder mixture, 0.6% of a dispersing agent, 12.1% of a solvent and 0.8% of an auxiliary; the component B is an epoxy curing agent, and the epoxy curing agent is prepared from modified materials of ammonia and plant cardanol; by adopting the high-molecular carboxylic acid dispersing agent and the acrylate dispersing agent, the dispersity of the pigment and the uniformity of a paint film are improved; meanwhile, the silane coupling agent and the non-silicon flatting agent are added, so that the adhesive force and the surface flatness of a paint film are further enhanced, and finally, the adhesive force and the durability of the epoxy paint are remarkably improved by optimizing a formula and a process.

Description

Technical Field

[0001] The invention belongs to the field of coatings, and in particular relates to a wear-resistant epoxy ceramic coating and a preparation method thereof. Background Art

[0002] Epoxy paint is widely used in the field of industrial coating due to its excellent adhesion, chemical resistance and mechanical properties; however, traditional epoxy paint still has problems such as insufficient adhesion and poor durability in certain special environments. Therefore, it is necessary to design a wear-resistant epoxy ceramic coating and its preparation method to solve the above problems. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a wear-resistant epoxy ceramic coating and a preparation method thereof, so as to solve the problems of insufficient adhesion and poor durability of epoxy paint on the existing market in certain special environments mentioned in the above background technology.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] A wear-resistant epoxy ceramic coating comprises a component A and a component B in a mass ratio of A:B=5:1, wherein the component A is composed of 40% epoxy resin, 46.5% ceramic powder mixture, 0.6% dispersant, 12.1% solvent and 0.8% auxiliary agent in mass percentage; the component B is an epoxy curing agent, and the epoxy curing agent is made of a modified material of ammonia and plant cardanol.

[0006] As a further improvement of the present invention, the ceramic powder mixture is formed by mixing 1% bentonite, 21% titanium dioxide and 24.5% corundum powder or 24.5% silicon carbide.

[0007] As a further improvement of the present invention, the solvent comprises 8.5% of C12-14 alkyl glycidyl ether and 3.6% of butanol.

[0008] As a further improvement of the present invention, the auxiliary agent consists of 0.5% coupling agent and 0.3% leveling agent.

[0009] As a further improvement of the present invention, the dispersant is composed of 0.3% of a polymer carboxylic acid dispersant and 0.3% of an acrylic ester dispersant.

[0010] As a further improvement of the present invention, the coupling agent is KH-560 silane coupling agent.

[0011] As a further improvement of the present invention, the leveling agent used is L-551R non-silicone leveling agent.

[0012] A method for preparing a wear-resistant epoxy ceramic coating comprises the following specific steps:

[0013] S1: Raw material preparation and proportioning: weigh and prepare the raw materials according to the formula ratio, including epoxy resin, ceramic powder mixture, solvent, additive and epoxy curing agent;

[0014] S2: Stirring and mixing: Add the epoxy resin, dispersant and ceramic powder mixture into the stirring tank, then add the solvent, use efficient dispersing equipment to mix and disperse the raw materials, and ensure that the mixture is evenly dispersed in the resin;

[0015] S3: Adjusting coating properties: Adding coupling agent and leveling agent in the additives to the coating to adjust the rheological properties, leveling properties and wear resistance of the coating;

[0016] S4: Filtration: To remove impurities, fibers, etc. in the paint, use a filter or gauze to filter and ensure the cleanliness of the paint;

[0017] S5: Inspection and adjustment: Inspect the prepared coating, including checking the dispersion of particles, rheological properties of the coating and curing time, etc. Make necessary adjustments based on the inspection results to ensure that the coating meets the design requirements;

[0018] S6: Packaging and storage: Pack the prepared coating into a sealed container, label it with information such as product name, batch and production date, and store it in a dry and ventilated place to prevent the coating from curing prematurely and ensure its stability and service life;

[0019] S7: Application and curing: Apply the wear-resistant epoxy ceramic coating on the required surface and perform curing according to the curing agent requirements of the coating, which usually includes room temperature curing or heating curing.

[0020] As a further improvement of the present invention, in S2, the stirring equipment is a bead mill or a high shear disperser.

[0021] As a further improvement of the present invention, in S7, the coating application process is strictly controlled to ensure that the coating uniformity and thickness meet the requirements, while avoiding problems caused by excessively thick coating.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention improves the dispersibility of the pigment and the uniformity of the paint film by adopting a polymer carboxylic acid dispersant and an acrylate dispersant; at the same time, a silane coupling agent and a non-silicon leveling agent are added to further enhance the adhesion and surface flatness of the paint film; finally, by optimizing the formula and process, the adhesion and durability of the epoxy paint are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A composition diagram of a wear-resistant epoxy ceramic coating proposed by the present invention;

[0026] Figure 2 The present invention is a flow chart of a method for preparing a wear-resistant epoxy ceramic coating. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with 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] The present invention provides the following embodiments:

[0029] First embodiment:

[0030] A wear-resistant epoxy ceramic coating, comprising component A and component B in a mass ratio of A:B=5:1, wherein component A is composed of 40% epoxy resin, 46.5% ceramic powder mixture, 0.6% dispersant, 12.1% solvent, and 0.8% auxiliary agent in mass percentage; component B is an epoxy curing agent, and the epoxy curing agent is made of a modified material of ammonia and plant cardanol; wherein, as a base resin, the epoxy resin provides basic adhesion and mechanical properties of the coating;

[0031] The ceramic powder mixture is made of 1% bentonite, 21% titanium dioxide and 24.5% corundum powder or 24.5% silicon carbide; the bentonite is used to adjust the hardness and thickness of the coating and enhance the mechanical properties of the coating; the titanium dioxide provides white hiding power and other whitening properties, improves the color whiteness and appearance of the coating; the corundum powder or silicon carbide increases the hardness and wear resistance of the coating and improves the scratch resistance;

[0032] The solvent includes 8.5% C12-14 alkyl glycidyl ether and 3.6% butanol; the C12-14 alkyl glycidyl ether is used as a solvent to help volatilization and fluidity, and promote the leveling and fluidity of the coating when wet coating; butanol is used as a drying accelerator to help the coating to dry faster and maintain good leveling and appearance during the drying process;

[0033] The additives are composed of 0.5% coupling agent and 0.3% leveling agent. The coupling agent is KH-560 silane coupling agent, and the leveling agent is L-551R non-silicone leveling agent. KH-560 silane coupling agent enhances the bonding force between the coating and the substrate, improves chemical resistance and weather resistance; L-551R non-silicone leveling agent improves the fluidity and leveling performance of the coating surface, making the coating surface smoother.

[0034] The dispersant is composed of 0.3% polymer carboxylic acid dispersant and 0.3% acrylate dispersant; the polymer carboxylic acid dispersant is used to improve the compatibility between the dispersant and the matrix, which helps to disperse the particles more evenly, and the acrylate dispersant helps to improve the gloss and durability of the coating and enhance its wear resistance and corrosion resistance.

[0035] The present invention improves the dispersibility of the pigment and the uniformity of the paint film by adopting a polymer carboxylic acid dispersant and an acrylate dispersant; at the same time, a silane coupling agent and a non-silicon leveling agent are added to further enhance the adhesion and surface flatness of the paint film; finally, by optimizing the formula and process, the adhesion and durability of the epoxy paint are significantly improved.

[0036] Second embodiment:

[0037] A method for preparing a wear-resistant epoxy ceramic coating comprises the following specific steps:

[0038] S1: Raw material preparation and proportioning: weigh and prepare the raw materials according to the formula ratio, including epoxy resin, ceramic powder mixture, solvent, additive and epoxy curing agent;

[0039] S2: Stirring and mixing: Add the epoxy resin, dispersant and ceramic powder mixture into the stirring tank, then add the solvent, use efficient dispersing equipment to mix and disperse the raw materials, and ensure that the mixture is evenly dispersed in the resin;

[0040] S3: Adjusting coating properties: Adding coupling agent and leveling agent in the additives to the coating to adjust the rheological properties, leveling properties and wear resistance of the coating;

[0041] S4: Filtration: To remove impurities, fibers, etc. in the paint, use a filter or gauze to filter and ensure the cleanliness of the paint;

[0042] S5: Inspection and adjustment: Inspect the prepared coating, including checking the dispersion of particles, rheological properties of the coating and curing time, etc. Make necessary adjustments based on the inspection results to ensure that the coating meets the design requirements;

[0043] S6: Packaging and storage: Pack the prepared coating into a sealed container, label it with information such as product name, batch and production date, and store it in a dry and ventilated place to prevent the coating from curing prematurely and ensure its stability and service life;

[0044] S7: Application and curing: Apply the wear-resistant epoxy ceramic coating on the required surface and perform curing according to the curing agent requirements of the coating, which usually includes room temperature curing or heating curing.

[0045] In S2, the stirring device is a bead mill or a high shear disperser.

[0046] In the S7, the coating application process is strictly controlled to ensure that the coating uniformity and thickness meet the requirements while avoiding problems caused by excessive coating thickness.

[0047] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wear-resistant epoxy ceramic coating, characterized in that : It comprises component A and component B in a mass ratio of A:B=5:1, wherein component A is composed of 40% epoxy resin, 46.5% ceramic powder mixture, 0.6% dispersant, 12.1% solvent and 0.8% auxiliary agent in mass percentage; component B is an epoxy curing agent, and the epoxy curing agent is made of a modified material of ammonia and plant cardanol.

2. The wear-resistant epoxy ceramic coating according to claim 1, characterized in that: The ceramic powder mixture is prepared by mixing 1% of bentonite, 21% of titanium dioxide and 24.5% of corundum powder or 24.5% of silicon carbide.

3. The wear-resistant epoxy ceramic coating according to claim 2, characterized in that: The solvent included 8.5% of C12-14 alkyl glycidyl ether and 3.6% of butanol.

4. The wear-resistant epoxy ceramic coating according to claim 3, characterized in that: The auxiliary agent consists of 0.5% coupling agent and 0.3% leveling agent.

5. The wear-resistant epoxy ceramic coating according to claim 4, characterized in that: The dispersant is composed of 0.3% of a high molecular weight carboxylic acid dispersant and 0.3% of an acrylic ester dispersant.

6. The wear-resistant epoxy ceramic coating according to claim 5, characterized in that: The coupling agent is KH-560 silane coupling agent.

7. The wear-resistant epoxy ceramic coating according to claim 6, characterized in that: The leveling agent used is L-551R non-silicone leveling agent.

8. A method for preparing a wear-resistant epoxy ceramic coating, characterized in that : Includes the following specific steps: S1: Raw material preparation and proportioning: weigh and prepare the raw materials according to the formula ratio, including epoxy resin, ceramic powder mixture, solvent, additive and epoxy curing agent; S2: Stirring and mixing: Add the epoxy resin, dispersant and ceramic powder mixture into the stirring tank, then add the solvent, use efficient dispersing equipment to mix and disperse the raw materials, and ensure that the mixture is evenly dispersed in the resin; S3: Adjusting coating properties: Adding coupling agent and leveling agent in the additives to the coating to adjust the rheological properties, leveling properties and wear resistance of the coating; S4: Filtration: To remove impurities, fibers, etc. in the paint, use a filter or gauze to filter and ensure the cleanliness of the paint; S5: Inspection and adjustment: Inspect the prepared coating, including checking the dispersion of particles, rheological properties of the coating and curing time, etc. Make necessary adjustments based on the inspection results to ensure that the coating meets the design requirements; S6: Packaging and storage: Pack the prepared coating into a sealed container, label it with information such as product name, batch and production date, and store it in a dry and ventilated place to prevent the coating from curing prematurely and ensure its stability and service life; S7: Application and curing: Apply the wear-resistant epoxy ceramic coating on the required surface and perform curing according to the curing agent requirements of the coating, which usually includes room temperature curing or heating curing.

9. The method for preparing a wear-resistant epoxy ceramic coating according to claim 8, characterized in that: In S2, the stirring device is a bead mill or a high shear disperser.

10. The method for preparing a wear-resistant epoxy ceramic coating according to claim 8, characterized in that: In the S7, the coating application process is strictly controlled to ensure that the coating uniformity and thickness meet the requirements while avoiding problems caused by excessive coating thickness.

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