A solvent-free glass flake anticorrosive coating and a preparation method thereof

Abstract

The application discloses a kind of solventless glass flake anticorrosive coating and preparation method thereof, it is related to anticorrosive coating technical field, the solventless glass flake anticorrosive coating includes epoxy resin 90~120 parts, antioxidant 5~10 parts, glass flake 20~30 parts, ultraviolet absorber 5~10 parts, toughening agent 5~10 parts, reflective material 20~30 parts, heat storage material 20~30 parts, fixed material 10~15 parts and heat-conducting fiber 10~15 parts.The application can increase the light reflection ability of product by setting reflective material, and reflective material has the ability to reflect ultraviolet, so as to reduce the damage of ultraviolet to the anticorrosive coating, reduce the aging rate of epoxy resin, combined with antioxidant and ultraviolet absorber can further reduce the aging rate of epoxy resin.

Description

Technical Field

[0001] This invention relates to the field of anti-corrosion coating technology, specifically to a solvent-free glass flake anti-corrosion coating and its preparation method. Background Technology

[0002] Solvent-free glass flake anti-corrosion coating is a type of coating without organic solvents. It is an environmentally friendly coating obtained by mixing epoxy resin and glass flakes. Due to the overlapping arrangement of glass flakes in the coating, the shrinkage rate during curing is small and the volume stability after curing is good. It has good adhesion to the substrate and greatly improves the impermeability of the coating film. It also has good waterproof ability. Epoxy resin glass flakes are easily affected by ultraviolet rays and temperature under light, resulting in aging and reduced service life.

[0003] The shortcomings of existing glass flake anti-corrosion coatings are: Existing technology CN115651494B discloses an epoxy glass flake anti-corrosion coating, which comprises component A and component B. Component A comprises the following components by weight: 20-30 parts epoxy resin; 5-10 parts petroleum resin; 2-10 parts glass flakes; 1-2 parts anti-settling agent; 40-55 parts filler; 0.5-1 part additive; and 8-15 parts solvent. Component B is a curing agent. The volume ratio of component A to component B is 3-5:1. This invention, by adding glass flakes, enables the prepared epoxy coating to possess anti-corrosion properties. Furthermore, this invention uses a novel method to prepare modified glass flakes instead of regular glass flakes, which can effectively improve the high-temperature resistance of the prepared epoxy glass flake anti-corrosion coating.

[0004] The above-mentioned technology can slow down the aging rate of epoxy resin under sunlight by absorbing ultraviolet rays through additives. However, the aging of epoxy resin is also affected by temperature. The above-mentioned technology cannot alleviate the aging of epoxy resin caused by high temperature under sunlight. Therefore, a solvent-free glass flake anti-corrosion coating that can reduce the impact of temperature and ultraviolet rays under sunlight on the aging of epoxy resin is needed to solve this problem. Summary of the Invention

[0005] One objective of this application is to provide a solvent-free glass flake anti-corrosion coating and its preparation method, which can solve the technical problems raised in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a solvent-free glass flake anti-corrosion coating, wherein the solvent-free glass flake anti-corrosion coating comprises 90-120 parts of epoxy resin, 5-10 parts of antioxidant, 20-30 parts of glass flakes, 5-10 parts of ultraviolet absorber, 5-10 parts of toughening agent, 20-30 parts of reflective material, 20-30 parts of heat storage material, 10-15 parts of fixing material, and 10-15 parts of thermally conductive fiber.

[0007] Preferably, the antioxidant is one of 3,5-di-tert-butyl-4-hydroxybenzyl phosphate and 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate.

[0008] Preferably, the ultraviolet absorber is one of 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-hydroxy-4-n-octyloxybenzophenone, 2,4-dihydroxybenzophenone, and 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole.

[0009] Preferably, the toughening agent is one of carboxyl-terminated butadiene-acrylonitrile rubber, hydroxyl-terminated butadiene-acrylonitrile rubber, epoxy-terminated liquid rubber, polyetheramine, and core-shell acrylate elastomer.

[0010] Preferably, the reflective material is one of zinc oxide powder and titanium dioxide powder.

[0011] Preferably, the heat storage material is paraffin wax.

[0012] Preferably, the fixing material is fumed silica.

[0013] Preferably, the thermally conductive fiber is one of copper fiber, aluminum fiber, stainless steel fiber, graphitized carbon fiber, graphene fiber, and silicon carbide fiber.

[0014] Preferably, the preparation method of the solvent-free glass flake anti-corrosion coating includes the following steps: S1. Add epoxy resin material, antioxidant, ultraviolet absorber and toughening agent to a stirring device with heating function and stir. The stirring speed of the stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30℃. S2. Then add the glass flakes into the first stirring device. The first stirring device continues to stir at a speed of 20 revolutions per minute for 20 minutes, and the stirring temperature is maintained at 30°C. S3. Then, the heat storage material and the fixing material are added to the second stirring device with heating function for stirring. The stirring speed of the second stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 70°C. S4. Then, the material in the second mixing device is added to the first mixing device for mixing. The mixing speed of the first mixing device is 20 revolutions per minute, the mixing time is 20 minutes, and the mixing temperature is maintained at 70°C.

[0015] Preferably, step S2 further includes the following steps: S21. Next, the reflective material and thermally conductive fiber are added to the first stirring device for stirring. The stirring speed of the first stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30°C.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention increases the reflectivity of the product by incorporating reflective materials, which also have the ability to reflect ultraviolet rays, thereby reducing the damage of ultraviolet rays to the anti-corrosion coating and slowing down the aging rate of epoxy resin. In combination with antioxidants and ultraviolet absorbers, the aging rate of epoxy resin can be further reduced.

[0017] 2. By incorporating a heat storage material that can absorb heat from sunlight, this invention reduces the rate at which the anti-corrosion material heats up under sunlight and decreases the aging rate of the epoxy resin under temperature influence.

[0018] 3. By setting a fixing material, the present invention can increase the stability of the heat storage material paraffin and avoid the heat storage material from being lost due to liquefaction and overflow of the paraffin at high temperature.

[0019] 4. By incorporating thermally conductive fibers, this invention increases the thermal conductivity of the material itself. The heat absorbed under sunlight can be quickly transferred to other products in contact with it or to parts of the material that are not exposed to sunlight, thereby further reducing the aging rate of epoxy resin under temperature influence. Attached Figure Description

[0020] Figure 1 This is a flowchart of the preparation method of the present invention. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1 A solvent-free glass flake anti-corrosion coating comprises 90-120 parts epoxy resin, 5-10 parts antioxidant, 20-30 parts glass flakes, 5-10 parts ultraviolet absorber, 5-10 parts toughening agent, 20-30 parts reflective material, 20-30 parts heat storage material, 10-15 parts fixing material, and 10-15 parts thermally conductive fiber.

[0023] The antioxidant is one of 3,5-di-tert-butyl-4-hydroxybenzyl phosphate diethyl ester and 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate.

[0024] The ultraviolet absorber is one of 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-hydroxy-4-n-octyloxybenzophenone, 2,4-dihydroxybenzophenone, and 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole. The ultraviolet absorber is used to absorb ultraviolet rays and reduce the damage of ultraviolet rays to epoxy resin.

[0025] The toughening agent is one of the following: carboxyl-terminated butadiene-acrylonitrile rubber, hydroxyl-terminated butadiene-acrylonitrile rubber, epoxy-terminated liquid rubber, polyetheramine, and core-shell acrylate elastomer. The toughening agent is used to increase the toughness of epoxy resin.

[0026] The reflective material is either zinc oxide powder or titanium dioxide powder. The reflective material is used to reflect ultraviolet and visible light, thereby reducing the heating of epoxy resin by light and ultraviolet rays.

[0027] The heat storage material is paraffin wax, which is used to absorb heat. When sunlight shines on the anti-corrosion coating, the heat generated when the coating temperature rises will be absorbed by the paraffin wax. In addition, the specific heat capacity of paraffin wax is relatively large, which can slow down the overall heating rate of the anti-corrosion coating and thus reduce the impact of temperature on the aging rate of epoxy resin.

[0028] The fixing material is fumed silica. Mixing fumed silica with paraffin can reduce the fluidity of paraffin and prevent it from overflowing from the anti-corrosion coating when the paraffin liquefies at elevated temperatures.

[0029] The thermally conductive fiber is one of copper fiber, aluminum fiber, stainless steel fiber, graphitized carbon fiber, graphene fiber, and silicon carbide fiber. The thermally conductive fiber can increase the thermal conductivity of the anti-corrosion coating, thereby enabling the local heat of the anti-corrosion coating to be quickly transferred to the product coated by the anti-corrosion coating, reducing the duration of local high temperature of the anti-corrosion coating, and reducing the impact of temperature on the aging rate of epoxy resin.

[0030] The preparation method of solvent-free glass flake anti-corrosion coating includes the following steps: S1. Add epoxy resin material, antioxidant, ultraviolet absorber and toughening agent to a stirring device with heating function and stir. The stirring speed of the stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30℃. S2. Then add the glass flakes into the first stirring device. The first stirring device continues to stir at a speed of 20 revolutions per minute for 20 minutes, and the stirring temperature is maintained at 30°C. S3. Then, the heat storage material and the fixing material are added to the second stirring device with heating function for stirring. The stirring speed of the second stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 70°C. S4. Then, the material in the second mixing device is added to the first mixing device for mixing. The mixing speed of the first mixing device is 20 revolutions per minute, the mixing time is 20 minutes, and the mixing temperature is maintained at 70°C to obtain a solvent-free glass flake anti-corrosion coating.

[0031] S2 also includes the following steps: S21. Next, the reflective material and thermally conductive fiber are added to the first stirring device for stirring. The stirring speed of the first stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30°C.

[0032] Please see Figure 1 The present invention provides an embodiment one: 1. Add 100 parts of epoxy resin material, 6 parts of antioxidant 3,5-di-tert-butyl-4-hydroxybenzyl phosphate diethyl ester, 6 parts of ultraviolet absorber 2-hydroxy-4-n-octyloxybenzophenone and 6 parts of toughening agent terminal hydroxyl nitrile rubber to a stirring device with heating function and stir. The stirring speed of the stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30℃. Second, add 25 glass flakes to stirring device one. Stirring device one continues to stir at a speed of 20 revolutions per minute for 20 minutes, and the stirring temperature is maintained at 30°C. Third, 22 parts of reflective material titanium dioxide powder and 12 parts of thermally conductive fiber graphene fiber were added to stirring device one for stirring. The stirring speed of stirring device one was 20 revolutions per minute, the stirring time was 20 minutes, and the stirring temperature was maintained at 30℃. Fourth, 25 parts of heat storage material paraffin and 13 parts of fixation material fumed silica were then added to stirring device two with heating function for stirring. The stirring speed of stirring device two was 20 revolutions per minute, the stirring time was 20 minutes, and the stirring temperature was maintained at 70℃. 5. Subsequently, the material in mixing device 2 is added to mixing device 1 for mixing. The mixing speed of mixing device 1 is 20 revolutions per minute, the mixing time is 20 minutes, and the mixing temperature is maintained at 70℃ to obtain solvent-free glass flake anti-corrosion coating.

[0033] Please see Figure 1 The present invention provides a second embodiment: 1. Add 100 parts of epoxy resin material, 6 parts of antioxidant 3,5-di-tert-butyl-4-hydroxybenzyl phosphate diethyl ester, 6 parts of ultraviolet absorber 2-hydroxy-4-n-octyloxybenzophenone and 6 parts of toughening agent terminal hydroxyl nitrile rubber to a stirring device with heating function and stir. The stirring speed of the stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30℃. Second, add 25 glass flakes to stirring device one. Stirring device one continues to stir at a speed of 20 revolutions per minute for 20 minutes, and the stirring temperature is maintained at 30°C. Third, 22 parts of reflective material titanium dioxide powder, 13 parts of fixing material fumed silica and 12 parts of thermally conductive fiber graphene fiber are added to stirring device one for stirring. The stirring speed of stirring device one is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30°C to obtain solvent-free glass flake anti-corrosion coating.

[0034] Please see Figure 1 The present invention provides a third embodiment: 1. Add 100 parts of epoxy resin material, 6 parts of antioxidant 3,5-di-tert-butyl-4-hydroxybenzyl phosphate diethyl ester, 6 parts of ultraviolet absorber 2-hydroxy-4-n-octyloxybenzophenone and 6 parts of toughening agent terminal hydroxyl nitrile rubber to a stirring device with heating function and stir. The stirring speed of the stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30℃. Second, add 25 glass flakes to stirring device one. Stirring device one continues to stir at a speed of 20 revolutions per minute for 20 minutes, and the stirring temperature is maintained at 30°C. Third, 22 parts of reflective material titanium dioxide powder and 12 parts of thermally conductive fiber graphene fiber were added to stirring device one for stirring. The stirring speed of stirring device one was 20 revolutions per minute, the stirring time was 20 minutes, and the stirring temperature was maintained at 30℃. Fourth, 25 portions of heat storage material paraffin were then added to a stirring device 2 with a heating function for stirring. The stirring speed of the stirring device 2 was 20 revolutions per minute, the stirring time was 20 minutes, and the stirring temperature was maintained at 70°C. 5. Subsequently, the material in mixing device 2 is added to mixing device 1 for mixing. The mixing speed of mixing device 1 is 20 revolutions per minute, the mixing time is 20 minutes, and the mixing temperature is maintained at 70℃ to obtain solvent-free glass flake anti-corrosion coating.

[0035] Please see Figure 1 The present invention provides an embodiment four: 1. Add 100 parts of epoxy resin material, 6 parts of antioxidant 3,5-di-tert-butyl-4-hydroxybenzyl phosphate diethyl ester, 6 parts of ultraviolet absorber 2-hydroxy-4-n-octyloxybenzophenone and 6 parts of toughening agent terminal hydroxyl nitrile rubber to a stirring device with heating function and stir. The stirring speed of the stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30℃. Second, add 25 glass flakes to stirring device one. Stirring device one continues to stir at a speed of 20 revolutions per minute for 20 minutes, and the stirring temperature is maintained at 30°C. Third, add 12 portions of thermally conductive graphene fiber to stirring device one for stirring. The stirring speed of stirring device one is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30℃. Fourth, 25 parts of heat storage material paraffin and 13 parts of fixation material fumed silica were then added to stirring device two with heating function for stirring. The stirring speed of stirring device two was 20 revolutions per minute, the stirring time was 20 minutes, and the stirring temperature was maintained at 70℃. 5. Subsequently, the material in mixing device 2 is added to mixing device 1 for mixing. The mixing speed of mixing device 1 is 20 revolutions per minute, the mixing time is 20 minutes, and the mixing temperature is maintained at 70℃ to obtain solvent-free glass flake anti-corrosion coating.

[0036] Please see Figure 1 The present invention provides a fifth embodiment: 1. Add 100 parts of epoxy resin material, 6 parts of antioxidant 3,5-di-tert-butyl-4-hydroxybenzyl phosphate diethyl ester, 6 parts of ultraviolet absorber 2-hydroxy-4-n-octyloxybenzophenone and 6 parts of toughening agent terminal hydroxyl nitrile rubber to a stirring device with heating function and stir. The stirring speed of the stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30℃. Second, add 25 glass flakes to stirring device one. Stirring device one continues to stir at a speed of 20 revolutions per minute for 20 minutes, and the stirring temperature is maintained at 30°C. Third, 22 portions of reflective material titanium dioxide powder were added to stirring device one for stirring. The stirring speed of stirring device one was 20 revolutions per minute, the stirring time was 20 minutes, and the stirring temperature was maintained at 30°C. Fourth, 25 parts of heat storage material paraffin and 13 parts of fixation material fumed silica were then added to stirring device two with heating function for stirring. The stirring speed of stirring device two was 20 revolutions per minute, the stirring time was 20 minutes, and the stirring temperature was maintained at 70℃. 5. Subsequently, the material in mixing device 2 is added to mixing device 1 for mixing. The mixing speed of mixing device 1 is 20 revolutions per minute, the mixing time is 20 minutes, and the mixing temperature is maintained at 70℃ to obtain solvent-free glass flake anti-corrosion coating.

[0037] Please see Figure 1 The present invention provides an embodiment six: 1. Add 100 parts of epoxy resin material, 6 parts of antioxidant 3,5-di-tert-butyl-4-hydroxybenzyl phosphate diethyl ester, 6 parts of ultraviolet absorber 2-hydroxy-4-n-octyloxybenzophenone and 6 parts of toughening agent terminal hydroxyl nitrile rubber to a stirring device with heating function and stir. The stirring speed of the stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30℃. Second, add 25 glass flakes to stirring device one. Stirring device one continues to stir at a speed of 20 revolutions per minute for 20 minutes, and the stirring temperature is maintained at 30°C. Third, 22 parts of reflective material titanium dioxide powder and 12 parts of thermally conductive fiber graphene fiber were added to stirring device one for stirring. The stirring speed of stirring device one was 20 revolutions per minute, the stirring time was 20 minutes, and the stirring temperature was maintained at 30°C to obtain solvent-free glass flake anti-corrosion coating.

[0038] Performance testing: 1. UV and Visible Light Reflectance Performance Testing: The products of each embodiment were coated simultaneously on the same substrate and then placed in sunlight. The reflectance coefficient of each product was then measured using a retroreflectometer. 2. Thermal conductivity and temperature change detection: The products of each embodiment were coated on the same transparent substrate at the same time, and then placed in sunlight. After 20 minutes, the temperature of the bottom transparent substrate of each product and the temperature of each product itself were detected.

[0039] Test data of each embodiment under the same test conditions

[0040] Experimental data shows that the present invention can increase the reflectivity of the product by setting reflective materials, and the reflective materials have the ability to reflect ultraviolet rays, thereby reducing the damage of ultraviolet rays to the anti-corrosion coating and slowing down the aging rate of epoxy resin. Combining antioxidants and ultraviolet absorbers can further reduce the aging rate of epoxy resin. By setting heat storage materials, heat can be absorbed during sunlight, thereby reducing the heating rate of the anti-corrosion material under sunlight and reducing the aging rate of epoxy resin under temperature influence.

[0041] In addition, by setting fixed materials, the stability of the heat storage material paraffin can be increased, preventing the heat storage material from being lost due to liquefaction and overflow at high temperatures. By setting thermally conductive fibers, the thermal conductivity of the material itself can be increased. The heat absorbed under sunlight can be quickly transferred to other products in contact with it or to the parts of itself that are not exposed to sunlight through its own thermal conductivity, further reducing the aging rate of epoxy resin under the influence of temperature.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the rights involved.

Claims

1. A solvent-free glass flake anti-corrosion coating, characterized in that: The solvent-free glass flake anti-corrosion coating comprises 90-120 parts epoxy resin, 5-10 parts antioxidant, 20-30 parts glass flakes, 5-10 parts ultraviolet absorber, 5-10 parts toughening agent, 20-30 parts reflective material, 20-30 parts heat storage material, 10-15 parts fixing material, and 10-15 parts thermally conductive fiber.

2. The solvent-free glass flake anti-corrosion coating according to claim 1, characterized in that: The antioxidant is one of 3,5-di-tert-butyl-4-hydroxybenzyl phosphate diethyl ester and 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate.

3. The solvent-free glass flake anti-corrosion coating according to claim 1, characterized in that: The ultraviolet absorber is one of 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-hydroxy-4-n-octyloxybenzophenone, 2,4-dihydroxybenzophenone, and 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole.

4. The solvent-free glass flake anti-corrosion coating according to claim 1, characterized in that: The toughening agent is one of the following: carboxyl-terminated butadiene-acrylonitrile rubber, hydroxyl-terminated butadiene-acrylonitrile rubber, epoxy-terminated liquid rubber, polyetheramine, and core-shell acrylate elastomer.

5. The solvent-free glass flake anti-corrosion coating according to claim 1, characterized in that: The reflective material is one of zinc oxide powder and titanium dioxide powder.

6. The solvent-free glass flake anti-corrosion coating according to claim 1, characterized in that: The heat storage material is paraffin wax.

7. The solvent-free glass flake anti-corrosion coating according to claim 1, characterized in that: The fixing material is fumed silica.

8. The solvent-free glass flake anti-corrosion coating according to claim 1, characterized in that: The thermally conductive fiber is one of copper fiber, aluminum fiber, stainless steel fiber, graphitized carbon fiber, graphene fiber, and silicon carbide fiber.

9. The method for preparing a solvent-free glass flake anti-corrosion coating according to claim 1, characterized in that: The preparation method of the solvent-free glass flake anti-corrosion coating includes the following steps: S1. Add epoxy resin material, antioxidant, ultraviolet absorber and toughening agent to a stirring device with heating function and stir. The stirring speed of the stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30℃. S2. Then add the glass flakes into the first stirring device. The first stirring device continues to stir at a speed of 20 revolutions per minute for 20 minutes, and the stirring temperature is maintained at 30°C. S3. Then, the heat storage material and the fixing material are added to the second stirring device with heating function for stirring. The stirring speed of the second stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 70°C. S4. Then, the material in the second mixing device is added to the first mixing device for mixing. The mixing speed of the first mixing device is 20 revolutions per minute, the mixing time is 20 minutes, and the mixing temperature is maintained at 70°C to obtain a solvent-free glass flake anti-corrosion coating.

10. The method for preparing a solvent-free glass flake anti-corrosion coating according to claim 9, characterized in that: The S2 further includes the following steps: S21. Next, the reflective material and thermally conductive fiber are added to the first stirring device for stirring. The stirring speed of the first stirring device is 20 revolutions per minute, the stirring time is 20 minutes, and the stirring temperature is maintained at 30°C.

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