A heavy-duty anticorrosive normal-temperature curing nanocomposite ceramic coating

Abstract

The present application relates to the technical fields of nanocomposite ceramic coating, in particular to a heavy-duty normal-temperature curing nanocomposite ceramic coating, which comprises a primer and a topcoat, wherein the primer comprises primer component A and primer component B; the primer component A comprises the following components and weight contents: 2-15 parts of propylene glycol ether, 10-15 parts of butyl acetate, 0.1-5 parts of ethylbenzene, 0.1-5 parts of dimethylbenzene, 23-40 parts of gamma-glycidyl ether oxypropyl trimethoxysilane and 5-15 parts of bisphenol A type epoxy resin; the primer component B comprises the following components and weight contents: 2-15 parts of isobutyl alcohol, 0.1-5 parts of ethylbenzene, 0.1-5 parts of dimethylbenzene, 23-40 parts of 2,4,6-tris(dimethylaminomethyl) phenol, 60-75 parts of low-molecular polyamide curing agent and 5-15 parts of bisphenol A type epoxy resin. The present application has excellent corrosion resistance when used in the lining of a flotation tank with strong acid corrosion and wear and impact resistance requirements, the lining of a garbage bin for containing household garbage, a garbage pit, a garbage leachate corrosion-resistant lining and the lining of a concrete tank with strong corrosion.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of nanocomposite ceramic coatings, in particular to a heavy-duty normal-temperature curing nanocomposite ceramic coating. BACKGROUND

[0002] The authorized invention with the publication number CN 109337546 B discloses a high-performance ceramic composite coating and a preparation method thereof. In the scheme, the first component includes organic silicone resin, polyaspartic acid ester, potassium aluminosilicate, ceramic microspheres, wetting dispersant, rheological aid, defoaming agent and leveling agent. The second component is aliphatic polyisocyanate. The ceramic composite coating has the advantages of high hardness, high wear resistance, high heat resistance, high weather resistance, excellent chemical resistance and no bubbles in the appearance of the prepared coating. The preparation method is simple, does not need to be baked to form a film, is easy to process, has excellent performance under normal-temperature preparation conditions and can be used in application fields such as water, acid and alkali resistance and weather resistance of building outer walls, chemical resistance of hospitals and laboratories and high-hardness wear resistance and corrosion resistance of industrial floors.

[0003] The authorized invention with the publication number CN 106349926 B discloses a water-based nanoceramic composite coating and a coating method thereof. In the scheme, the water-based acrylic acid polymer, the silicon sol solution, the siloxane, the alcohol, the deionized water and the trace amount of metal oxide are stirred in the reactor at normal temperature and pressure for 20-60 minutes to produce a reaction, form a composite ester, add the pigment and the weak acid and stir at normal temperature and pressure for 5-60 minutes to mature, so that the preparation of the coating is completed. The water-based nanoceramic composite coating has the advantages of rich color, strong adhesion of organic coatings and super-hard wear resistance and corrosion resistance of inorganic coatings. The coating can be cured at a temperature below 80 degrees or at normal temperature, and the problem of the surface coating of a plastic device is solved. The pencil hardness of the coating surface can reach 4H, the scratch resistance and the acid and alkali corrosion resistance are greatly improved compared with organic coatings, and the coating has the functions of antistatic property, fingerprint resistance and ultraviolet aging resistance. The water-based nanoceramic composite coating is water-based, does not release toxic substances such as formaldehyde and benzene, is safe and environmentally friendly, the coating can be cured at low temperature and is convenient for plastic substrate processing.

[0004] However, there are still some deficiencies in the prior art, wherein when coating is carried out in a flotation tank lining with strong acid corrosion and impact resistance requirements, a garbage warehouse lining filled with household garbage, a garbage pool, a garbage leachate corrosion-resistant lining and a concrete tank lining with strong corrosion, the coating in the prior art cannot adapt to the above-mentioned environment with strong corrosion. In view of this, we propose a kind of heavy anti-corrosion normal temperature curing nano composite ceramic coating. SUMMARY

[0005] The purpose of the present application is to provide a kind of heavy anti-corrosion normal temperature curing nano composite ceramic coating, which solves the problem that when coating is carried out in a flotation tank lining with strong acid corrosion and impact resistance requirements, a garbage warehouse lining filled with household garbage, a garbage pool, a garbage leachate corrosion-resistant lining and a concrete tank lining with strong corrosion, the coating in the prior art cannot adapt to the above-mentioned environment with strong corrosion.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A kind of heavy anti-corrosion normal temperature curing nano composite ceramic coating, including primer and finish, wherein primer includes primer component A and primer component B, the primer component A includes the following components and weight parts content: 2-15 parts of propylene glycol ether, 10-15 parts of butyl acetate, 0.1-5 parts of ethylbenzene, 0.1-5 parts of dimethylbenzene, 23-40 parts of gamma-glycidyl ether oxypropyl trimethoxysilane, 5-15 parts of bisphenol A type epoxy resin;

[0008] The primer component B includes the following components and weight parts content: 2-15 parts of isobutyl alcohol, 0.1-5 parts of ethylbenzene, 0.1-5 parts of dimethylbenzene, 23-40 parts of 2, 4, 6-tri (dimethylaminomethyl) phenol, 60-75 parts of low molecular weight polyamide curing agent, 5-15 parts of bisphenol A type epoxy resin;

[0009] The primer and finish all include solvent, and the solvent is Tanna water.

[0010] Preferably, the ratio between the primer component A, primer component B and Tanna water is 70:10:10.

[0011] Preferably, the finish is configured by the following weight parts components when configuring, 200 parts of finish component A, 100 parts of finish component B, 50 parts of finish component C, 10-20 parts of Tanna water and 30-35 parts of color paste.

[0012] Preferably, the finish component A includes the following components and weight parts content: 5-8 parts of butyl acetate, 5-8 parts of ethyl acetate, 18-23 parts of polyether type polyurethane, 20-35 parts of hydrogenated diphenyl methane diisocyanate, 10-15 parts of dibutyl tin oxide.

[0013] The topcoat component B comprises the following components and weight parts: 1-5 parts of 2-butanone, 5-8 parts of propyl acetate, 5-8 parts of butyl acetate, 0.1-5 parts of ethylbenzene, 0.1-5 parts of dimethylbenzene, 20-35 parts of 4,4'-diaminodiphenyl methane, 18-23 parts of polyamide PA6, 10-15 parts of silicon dioxide;

[0014] The topcoat component C comprises the following components and weight parts: 18-23 parts of propylene glycol methyl ether acetate, 0.1-5 parts of ethylbenzene, 0.1-5 parts of dimethylbenzene, 23-43 parts of urea-formaldehyde resin, 10-15 parts of titanium dioxide.

[0015] Preferably, the thickness of the primer coating is 40-90 μm, and the thickness of the topcoat coating is 90-140 μm.

[0016] Preferably, the topcoat C further comprises the following components and weight parts: 10-15 parts of molybdenum disulfide, 10-15 parts of carbon powder.

[0017] Preferably, the low-molecular polyamide curing agent is H-4 epoxy curing agent.

[0018] By the above technical solution, the application provides a heavy-duty normal-temperature curing nano-composite ceramic coating.

[0019] (1) The nano-composite ceramic coating in the application has excellent corrosion resistance when used in a flotation tank lining, a garbage warehouse lining for containing household garbage, a garbage pit, a garbage leachate corrosion-resistant lining, and a concrete tank lining with strong corrosion, thereby prolonging the service life of the coating.

[0020] (2) The coating in the application has excellent performance as shown by the test results of the heat resistance, impact resistance, wear resistance, flexibility and adhesion under the national standard, and the acid mist corrosion test under high temperature conditions. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the application.

[0022] The heavy-duty anticorrosive normal-temperature curing nano-composite ceramic coating of the present application, in use, first carries out pretreatment on the coating surface, when coating on the surface of metal substrate, needs to carry out oil and grease removal, rust removal and sand blasting treatment on the surface of metal substrate, wipes the surface of metal substrate through organic solvent, removes the oil and grease on the surface of metal substrate, in the present scheme, the treatment on the surface of metal substrate takes acetone or tian water as an example, then carries out sand blasting rust removal treatment, sand blasting adopts 60-80 mesh sand, the cleanliness of the treated metal substrate surface reaches more than Sa2.5 level of international standard ISO 8501-1, and the surface roughness of the metal substrate reaches more than 50 μm, when coating on the surface of concrete, needs to keep the surface of concrete substrate oil-free, clean and dry, flat and compact, without dusting and without spongy skin layer, and keep appropriate roughness, wherein the appropriate roughness is more than 50 μm, that is, the surface roughness after treatment of the metal substrate is consistent, after completing the pretreatment operation on the coating surface, prepares the coating tool, when carrying out roll coating or brushing operation, needs to keep the roller or brush dry and clean, and does not produce shedding of brush hair in the process of roll coating or brushing, when carrying out spraying operation, needs to use a nozzle with a caliber of 2.0-2.5 of a spray gun and keep the inside of the nozzle dry and clean, then can prepare the coating, when preparing, adds primer B to primer A at a mass ratio, and adds tian water as a solvent, continuously stirs for 1-3 minutes in the process of adding, and completes the coating operation of primer in 20-30 minutes, after completing the brushing of primer, carries out surface drying operation for 25-35 minutes, at the same time carries out complete curing operation for 50-70 minutes, and after completing the curing operation, prepares topcoat, adds topcoat B and topcoat C to topcoat A at a mass ratio, at the same time adds tian water as a solvent, continuously stirs for 1-2 minutes, then adds color paste, and stirs for 1-2 minutes again, completes the coating operation of topcoat in 20-30 minutes, carries out surface drying operation for 15-25 minutes, complete curing operation for 20-30 hours and ceramic operation for 68-78 hours, then completes the construction of coating and can be put into use.

[0023] Example 1

[0024] 2 parts of propylene glycol ethyl ether, 10 parts of butyl acetate, 1 part of ethylbenzene, 1 part of xylene, 25 parts of γ-glycidoxypropyltrimethoxysilane, 5 parts of bisphenol A type epoxy resin are formulated into primer A; and 2 parts of isobutyl alcohol, 1 part of ethylbenzene, 1 part of xylene, 25 parts of 2,4,6-tris(dimethylaminomethyl)phenol, 60 parts of low molecular weight polyamide curing agent, 5 parts of bisphenol A type epoxy resin are formulated into primer B, the primer A, primer B and solvent are formulated and coated in the ratio of 70:10:10 according to the above steps, at the same time, 5 parts of butyl acetate, 5 parts of ethyl acetate, 20 parts of polyether type polyurethane, 20 parts of hydrogenated diphenylmethane diisocyanate, 10 parts of dibutyl tin oxide are formulated into topcoat A; at the same time, 1 part of 2-butanone, 5 parts of propyl acetate, 5 parts of butyl acetate, 1 part of ethylbenzene, 1 part of xylene, 20 parts of 4,4'-diaminodiphenylmethane, 20 parts of polyamide PA6, 10 parts of silicon dioxide are formulated into topcoat B; and 20 parts of propylene glycol methyl ether acetate, 1 part of ethylbenzene, 1 part of xylene, 25 parts of urea-formaldehyde resin, 10 parts of titanium dioxide are formulated into topcoat C, the topcoat A, topcoat B, topcoat C, solvent and color paste are formulated and coated in the ratio of 200:100:50:20:30 according to the above steps;

[0025] Example 2

[0026] 2 parts of propylene glycol ethyl ether, 10 parts of butyl acetate, 1 part of ethylbenzene, 1 part of xylene, 25 parts of γ-glycidoxypropyltrimethoxysilane, 5 parts of bisphenol A type epoxy resin are formulated into primer A; and 2 parts of isobutyl alcohol, 1 part of ethylbenzene, 1 part of xylene, 25 parts of 2,4,6-tris(dimethylaminomethyl)phenol, 60 parts of low molecular weight polyamide curing agent, 5 parts of bisphenol A type epoxy resin are formulated into primer B, the primer A, primer B and solvent are formulated and coated in the ratio of 70:10:10 according to the above steps, at the same time, 8 parts of butyl acetate, 8 parts of ethyl acetate, 20 parts of polyether type polyurethane, 35 parts of hydrogenated diphenylmethane diisocyanate, 15 parts of dibutyl tin oxide are formulated into topcoat A; and 5 parts of 2-butanone, 8 parts of propyl acetate, 8 parts of butyl acetate, 5 parts of ethylbenzene, 5 parts of xylene, 35 parts of 4,4'-diaminodiphenylmethane, 20 parts of polyamide PA6, 15 parts of silicon dioxide are formulated into topcoat B; at the same time, 20 parts of propylene glycol methyl ether acetate, 5 parts of ethylbenzene, 5 parts of xylene, 40 parts of urea-formaldehyde resin, 15 parts of titanium dioxide are formulated into topcoat C, the topcoat A, topcoat B, topcoat C, solvent and color paste are formulated and coated in the ratio of 200:100:50:10:35 according to the above steps

[0027] Example 3

[0028] A base paint A is prepared by mixing 15 parts of propylene glycol ethyl ether, 15 parts of butyl acetate, 5 parts of ethylbenzene, 5 parts of xylene, 40 parts of γ-glycidoxypropyltrimethoxysilane, and 15 parts of bisphenol A type epoxy resin; a base paint B is prepared by mixing 15 parts of isobutyl alcohol, 5 parts of ethylbenzene, 5 parts of xylene, 40 parts of 2,4,6-tris(dimethylaminomethyl)phenol, 75 parts of a low-molecular polyamide curing agent, and 15 parts of bisphenol A type epoxy resin; a base paint A, a base paint B, and a solvent are mixed in a ratio of 70:10:10 and coated according to the above procedure; a finish paint A is prepared by mixing 5 parts of butyl acetate, 5 parts of ethyl acetate, 20 parts of a polyether-based polyurethane, 20 parts of hydrogenated diphenylmethane diisocyanate, and 10 parts of dibutyltin oxide; a finish paint B is prepared by mixing 1 part of 2-butanone, 5 parts of propyl acetate, 5 parts of butyl acetate, 1 part of ethylbenzene, 1 part of xylene, 20 parts of 4,4'-diaminodiphenylmethane, 20 parts of polyamide PA6, and 10 parts of silicon dioxide; a finish paint C is prepared by mixing 20 parts of propylene glycol methyl ether acetate, 1 part of ethylbenzene, 1 part of xylene, 25 parts of urea-formaldehyde resin, and 10 parts of titanium dioxide; and a finish paint A, a finish paint B, a finish paint C, a solvent, and a color paste are mixed in a ratio of 200:100:50:20:30 and coated according to the above procedure.

[0029] Comparative Example 1

[0030] A first component is prepared by mixing 30 parts of polyaspartic ester, 5 parts of potassium aluminosilicate, 5 parts of ceramic microspheres, 0.6 part of a wetting dispersant, 2 parts of a rheological aid, 0.1 part of a defoaming agent, 0.1 part of a leveling agent, and 57 parts of a solvent; a second component is a fatty polyisocyanate; and the first component and the second component are mixed in a weight ratio of 3:1 and coated according to the same procedure as in the examples.

[0031] Comparative Example 2

[0032] A first component is prepared by mixing 40 parts of silicone resin, 30 parts of polyaspartic ester, 5 parts of potassium aluminosilicate, 0.6 part of a wetting dispersant, 2 parts of a rheological aid, 0.1 part of a defoaming agent, 0.1 part of a leveling agent, and 22 parts of a solvent; a second component is a fatty polyisocyanate; and the first component and the second component are mixed in a weight ratio of 3:1 and coated according to the same procedure as in the examples.

[0033] Comparative Example 3

[0034] A first component is prepared by mixing 40 parts of silicone resin, 30 parts of polyaspartic ester, 5 parts of potassium aluminosilicate, 5 parts of ceramic microspheres, 0.6 part of a wetting dispersant, 2 parts of a rheological aid, 0.1 part of a defoaming agent, 0.1 part of a leveling agent, and 17 parts of a solvent; a second component is a fatty polyisocyanate; and the first component and the second component are mixed in a weight ratio of 3:1 and coated according to the same procedure as in the examples.

[0035] After the coating operation of the above-mentioned examples and comparative examples, the coatings were tested: the temperature resistance of the examples and comparative examples was tested according to the national standard GB / T 1735-2009 "Determination of the heat resistance of paint and varnish", wherein the examples 1, 2 and 3 did not produce peeling, softening, bubbles, cracks and wrinkling phenomena after being tested at a temperature of 180℃ for 24 hours, and the color did not change significantly, while comparative example 1 produced more serious peeling and obvious softening, bubbles, cracks and wrinkling phenomena under the same conditions, and comparative examples 2 and 3 produced visible peeling under the same conditions;

[0036] The impact resistance of the examples and comparative examples was tested according to the national standard GB / T 1732-1993 "Determination of the impact resistance of paint film", wherein the paint film of examples 1, 2 and 3 did not have any cracks under the experimental conditions of 40 kg·cm, and the paint film showed good impact resistance, while comparative example 1 produced more serious cracks in the paint film under the experimental conditions of 40 kg·cm, and comparative examples 2 and 3 produced obvious cracks in the paint film under the experimental conditions of 40 kg·cm;

[0037] The impact resistance of the examples and comparative examples was tested according to the national standard GB / T 1768-2006 "Determination of the wear resistance of paint and varnish by the rotating rubber sand wheel method", wherein the mass loss of examples 1, 2 and 3 was less than 15 mg under the test conditions of a rotation speed RPM of 1000 r or a relative centrifugal force RCF of 1000 g, and was 2.4 mg, 2.3 mg and 1.7 mg, respectively, while the mass loss of comparative examples 1, 2 and 3 was 31.3 mg, 25.6 mg and 2.5 mg, respectively;

[0038] The bending resistance of the examples and comparative examples was tested according to the national standard GB / T 1731-1993 "Determination of the flexibility of paint film", wherein the test results of examples 1, 2 and 3 were less than 2 mm, the test result of comparative example 1 was less than 5 mm, and the test results of comparative examples 2 and 3 were less than 4 mm;

[0039] The adhesion of the examples and comparative examples was tested according to the national standard GB / T 5210-2006 "Adhesion test by the pull-off method for paint and varnish", wherein the results of examples 1, 2 and 3 were greater than 15 MPa under the test conditions of a Sa2.5 roughness and a coating thickness of 70 μm, while the results of comparative examples 1, 2 and 3 were all less than 5 MPa under the same test conditions;

[0040] Finally, the corrosion resistance of the examples and the comparative examples was tested. After 168 hours of testing in a sulfuric acid nitric acid vapor environment at 180°C, the examples 1, 2 and 3 did not show peeling, softening, bubbling, cracking and wrinkling, and the color did not change significantly. Comparative example 1 showed more serious peeling, softening, bubbling, cracking and wrinkling under the same testing conditions. Comparative examples 2 and 3 showed visible peeling and obvious softening, bubbling, cracking and wrinkling under the same testing conditions.

[0041] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0042] While the embodiments of the application have been shown and described, it is to be understood that the embodiments described are only by way of example and that changes can be made in the embodiments without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A heavy-duty room temperature vulcanizing nanocomposite ceramic coating, characterized in that: The primer and the topcoat, wherein the primer comprises primer component A and primer component B, the primer component A comprises the following components and weight parts: 2-15 parts of propylene glycol ether, 10-15 parts of butyl acetate, 0.1-5 parts of ethylbenzene, 0.1-5 parts of dimethylbenzene, 23-40 parts of γ-glycidyl ether oxylpropyl trimethoxysilane, 5-15 parts of bisphenol A type epoxy resin; The primer component B comprises the following components and weight parts: 2-15 parts of isobutyl alcohol, 0.1-5 parts of ethylbenzene, 0.1-5 parts of dimethylbenzene, 23-40 parts of 2,4,6-tris (dimethylaminomethyl) phenol, 60-75 parts of low molecular weight polyamide curing agent, 5-15 parts of bisphenol A type epoxy resin; The primer and the topcoat both comprise a solvent, and the solvent is Tinnal water; the ratio between the primer component A, the primer component B and the Tinnal water is 70:10:10; The topcoat is configured by the following components and weight parts when configured: 200 parts of topcoat component A, 100 parts of topcoat component B, 50 parts of topcoat component C, 10-20 parts of Tinnal water and 30-35 parts of color paste; The topcoat component A comprises the following components and weight parts: 5-8 parts of butyl acetate, 5-8 parts of ethyl acetate, 18-23 parts of polyether type polyurethane, 20-35 parts of hydrogenated diphenyl methane diisocyanate, 10-15 parts of dibutyl tin oxide; The topcoat component B comprises the following components and weight parts: 1-5 parts of 2-butanone, 5-8 parts of propyl acetate, 5-8 parts of butyl acetate, 0.1-5 parts of ethylbenzene, 0.1-5 parts of dimethylbenzene, 20-35 parts of 4,4'-diaminodiphenylmethane, 18-23 parts of polyamide PA6, 10-15 parts of silicon dioxide; The topcoat component C comprises the following components and weight parts: 18-23 parts of propylene glycol methyl ether acetate, 0.1-5 parts of ethylbenzene, 0.1-5 parts of dimethylbenzene, 23-43 parts of urea-formaldehyde resin, 10-15 parts of titanium dioxide.

2. The heavy-duty anticorrosive room-temperature-cured nanocomposite ceramic coating according to claim 1, characterized in that: The thickness of the primer coating is 40-90 μm, and the thickness of the topcoat coating is 90-140 μm.

3. The heavy-duty anticorrosive room-temperature-cured nanocomposite ceramic coating according to claim 1, characterized in that: The topcoat C further comprises the following components and weight parts: 10-15 parts of molybdenum disulfide, 10-15 parts of carbon powder.

4. The heavy-duty anticorrosive room-temperature-cured nanocomposite ceramic coating according to claim 1, characterized in that: The low molecular weight polyamide curing agent is H-4 epoxy curing agent.