Anti-corrosion thermal insulation material, preparation method and application of anti-corrosion thermal insulation material

Abstract

The invention discloses an anti-corrosion thermal insulation material, a preparation method and application thereof. The coating comprises the following components in parts by weight: 0.1-4 parts of graphene, 5-15 parts of composite microspheres, 10-30 parts of barium sulfate, 10-30 parts of film-forming resin, 18-45 parts of pigments and fillers, 1-8 parts of auxiliaries and 20-50 parts of deionized water. The anti-corrosion and heat-insulating material combines the advantages of graphene, composite microspheres and barium sulfate, and has excellent anti-corrosion performance and heat-insulating performance; the graphene and the composite microspheres can effectively reflect and block heat transfer, so that the temperature of the surface of the coating is reduced; due to the addition of barium sulfate, the stability and mechanical property of the coating are improved, and meanwhile, the corrosion resistance of the coating is enhanced; the preparation process is simple, low in cost and easy for industrial production; and the surface treating agent is suitable for various metal and non-metal surfaces, such as plates, industrial equipment, storage tanks, pipelines and buildings, and has a wide application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of anti-corrosion and heat-insulating materials, in particular to an anti-corrosion and heat-insulating material, a preparation method and application thereof. Background Art

[0002] With the development of industry, the demand for anti-corrosion and thermal insulation materials is increasing. Traditional anti-corrosion and thermal insulation materials have many shortcomings in performance, such as poor thermal insulation effect, poor anti-corrosion performance, and short service life. Therefore, it is particularly important to develop a new, efficient, and environmentally friendly anti-corrosion and thermal insulation material. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides an anti-corrosion and heat-insulating material based on graphene, composite microspheres and barium sulfate, which has excellent anti-corrosion performance, heat-insulating performance and a long service life.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions: An anticorrosive heat-insulating material, comprising the following components by weight: 0.1-4 parts of graphene, 5-15 parts of composite microspheres, 10-30 parts of barium sulfate, 10-30 parts of film-forming resin, 18-45 parts of pigments and fillers, 1-8 parts of additives and 20-50 parts of deionized water.

[0005] In the above technical solution, preferably, the composite microspheres are a mixture of expanded microspheres and hollow glass microspheres; The average particle size of expanded microspheres is 15-40μm, and the density is 0.01-0.5g / cm³; the average particle size of hollow glass microspheres is 15-75μm, and the density is 0.15-0.3g / cm³.

[0006] In the above technical solution, preferably, the barium sulfate has a fineness of 1000-4000 mesh; The film-forming resin is an organic silicon-modified acrylic emulsion, the solid content of the emulsion is 48±3%, and the glass transition temperature is 24-28°C.

[0007] In the above technical solution, preferably, the pigment filler is a mixture of two or more of rutile titanium dioxide, phthalocyanine blue, yellow iron oxide, cinnabar, realgar, fumed silica, heavy calcium carbonate, rare earth metal oxides, bentonite, talc and barium sulfate.

[0008] In the above technical solution, preferably, the auxiliary agent is one or more of a wetting agent, a dispersant, a defoaming agent, a preservative, a film-forming agent, a thickener, a leveling agent and a preservative.

[0009] The method for preparing the above-mentioned anticorrosion and heat-insulating material comprises the following steps: S1. Add all pigments and fillers to deionized water, gradually increase the stirring speed until it reaches 1300 revolutions per minute, stir for 40 minutes, and add 60% of the additives to obtain a uniformly dispersed mixture. S2. Add the film-forming resin and graphene to the mixture in sequence and stir for 30 minutes. S3. Reduce the stirring rate to 800 revolutions per minute, add the remaining 40% of the additives and barium sulfate, and continue to stir for 30 minutes to obtain a uniform coating. S4. Add the composite microspheres to the coating and continue to stir until the composite microspheres are uniformly dispersed in the coating. S5. Perform vacuum treatment on the stirred coating to remove air bubbles and improve the density and heat insulation performance of the coating. S6. Spray or brush the treated coating, and wait for it to dry naturally or by heating to form an anti-corrosion and heat-insulating coating.

[0010] In the above technical solution, preferably, in step S2, nano-porous silica aerogel is added before adding the film-forming resin.

[0011] In the above technical solution, preferably, the nano-porous silica aerogel is used as part of the composite microspheres or added separately to enhance the heat insulation effect.

[0012] In the above technical solution, preferably, in step S2, carbon nanotubes are added after adding graphene.

[0013] An application of an anti-corrosion and heat-insulating material, which is the above anti-corrosion and heat-insulating material, and is applied to a board as an anti-corrosion and heat-insulating layer.

[0014] The beneficial effects of the present invention are as follows: The anti-corrosion and heat-insulating material of the present invention combines the advantages of graphene, composite microspheres and barium sulfate, and has excellent anti-corrosion performance and heat insulation performance. Graphene and composite microspheres in the anti-corrosion and heat-insulating material of the present invention can effectively reflect and block heat transfer and reduce the temperature on the surface of the coating. The addition of barium sulfate improves the stability and mechanical properties of the coating, and at the same time enhances the anti-corrosion performance of the coating. The preparation process of the anti-corrosion and heat-insulating material of the present invention is simple, the cost is low, and it is easy to be industrially produced. The anti-corrosion and heat-insulating material of the present invention is applicable to various metal and non-metal surfaces, such as boards, industrial equipment, storage tanks, pipelines, buildings, etc., and has broad application prospects. Specific embodiments

[0015] The present invention will be further described in detail below in conjunction with specific embodiments: An anti-corrosion and heat-insulating material, by weight, includes the following components: 0.1 - 4 parts of graphene, 5 - 15 parts of composite microspheres, 10 - 30 parts of barium sulfate, 10 - 30 parts of film-forming resin, 18 - 45 parts of pigment and filler, 1 - 8 parts of additives, and 20 - 50 parts of deionized water.

[0016] Among them, the composite microspheres are a mixture of expandable microspheres and hollow glass microspheres. The average particle size of the expandable microspheres is 15 - 40 μm, and the density is 0.01 - 0.5 g / cm³; the average particle size of the hollow glass microspheres is 15 - 75 μm, and the density is 0.15 - 0.3 g / cm³.

[0017] Among them, the fineness of barium sulfate is 1000 - 4000 mesh.

[0018] Among them, the film-forming resin is an acrylic emulsion modified with silicone. The solid content of the emulsion is 48 ± 3%, and the glass transition temperature is 24 - 28 °C.

[0019] Among them, the pigment and filler are a mixture of two or more of rutile titanium dioxide, phthalocyanine blue, iron oxide yellow, cinnabar, realgar, fumed silica, heavy calcium carbonate, rare earth metal oxides, bentonite, talc powder, and barium sulfate.

[0020] Among them, the additives are one or more of wetting agents, dispersants, defoamers, preservatives, film-forming agents, thickeners, leveling agents, and preservatives.

[0021] A preparation method of the anti-corrosion and heat-insulating material, comprising the following steps: S1. Add all the pigment and filler into deionized water, gradually increase the stirring speed until 1300 revolutions per minute, stir for 40 minutes, and add 60% of the additives to obtain a uniformly dispersed mixture. S2. Add the film-forming resin and graphene into the mixture in sequence, and stir for 30 minutes. S3. Reduce the stirring rate to 800 revolutions per minute, add the remaining 40% of the additives and barium sulfate, and continue to stir for 30 minutes to obtain a uniform coating. S4. Add the composite microspheres into the coating, and continue to stir until the composite microspheres are uniformly dispersed in the coating. S5. Perform vacuum treatment on the stirred coating to remove air bubbles and improve the density and heat-insulating performance of the coating. S6. Spray or brush the treated coating, and wait for it to dry naturally or by heating to form an anti-corrosion and heat-insulating coating.

[0022] As one of the implementation manners, in step S2, nano-porous silica aerogel is added before adding the film-forming resin. Among them, the nano-porous silica aerogel can be part of the composite microspheres or be added separately to enhance the heat insulation effect. When added in step S2, it is in the form of separate addition, while when it is part of the composite microspheres, it is added along with the composite microspheres in step S4.

[0023] As one of the implementation manners, in step S2, after adding graphene, carbon nanotubes are added continuously.

[0024] The anti-corrosion and heat-insulating material is applied to the board as an anti-corrosion and heat-insulating layer. For example, in step S6, the coating is sprayed or brushed onto the board, and the board can be the board used for outdoor houses, such as the board of a sunroom, a tool room and other housing bodies. Example 1

[0025] An anti-corrosion and heat-insulating material, by weight, comprises the following components: 0.1 part of graphene, 5 parts of composite microspheres, 30 parts of barium sulfate, 10 parts of film-forming resin, 18 parts of pigment and filler, 1 part of auxiliary agent and 50 parts of deionized water.

[0026] Among them, the composite microspheres are a mixture of expandable microspheres and hollow glass microspheres. The average particle size of the expandable microspheres is 15 - 40 μm, and the density is 0.01 - 0.5 g / cm³; the average particle size of the hollow glass microspheres is 15 - 75 μm, and the density is 0.15 - 0.3 g / cm³.

[0027] Among them, the fineness of barium sulfate is 1000 - 4000 mesh.

[0028] Among them, the film-forming resin is an organosilicon-modified acrylic emulsion, the solid content of the emulsion is 48 ± 3%, and the glass transition temperature is 24 - 28 °C.

[0029] Among them, the pigment and filler is a mixture of rutile titanium dioxide, iron oxide yellow, talc powder and barium sulfate.

[0030] Among them, the auxiliary agent is one or several of a wetting agent, a dispersing agent, an antifoaming agent, a preservative, a film-forming agent, a thickening agent, a leveling agent and a preservative.

[0031] A preparation method of the anti-corrosion and heat-insulating material comprises the following steps: S1. According to the above raw material ratio, add the mixture of rutile titanium dioxide, iron oxide yellow, talc powder and barium sulfate into deionized water, gradually increase the stirring speed until it reaches 1300 revolutions per minute, stir for 40 minutes, and add 60% of the auxiliary agent to obtain a uniformly dispersed mixture; S2. Add nano-porous silica aerogel, organosilicon-modified acrylic emulsion and graphene into the mixture in sequence, and stir for 30 minutes; S3. Reduce the stirring rate to 800 revolutions per minute, add the remaining 40% of the additives and barium sulfate, and continue stirring for 30 minutes to obtain a uniform coating; S4. Add the mixture of expandable microspheres and hollow glass microspheres to the coating, and continue stirring until the composite microspheres are evenly dispersed in the coating; S5. Conduct vacuum treatment on the stirred coating to remove air bubbles and improve the density and heat insulation performance of the coating; S6. Spray or brush the treated coating, and wait for it to dry naturally or by heating to form an anti-corrosion and heat-insulating coating. Example 2

[0032] An anti-corrosion and heat-insulating material, by weight, comprises the following components: 4 parts of graphene, 15 parts of composite microspheres, 10 parts of barium sulfate, 30 parts of film-forming resin, 45 parts of pigment and filler, 8 parts of additives, and 20 parts of deionized water.

[0033] Among them, the composite microspheres are a mixture of expandable microspheres and hollow glass microspheres. The average particle size of the expandable microspheres is 15 - 40 μm, and the density is 0.01 - 0.5 g / cm³; the average particle size of the hollow glass microspheres is 15 - 75 μm, and the density is 0.15 - 0.3 g / cm³.

[0034] Among them, the fineness of barium sulfate is 1000 - 4000 mesh.

[0035] Among them, the film-forming resin is an organosilicon-modified acrylic emulsion, the solid content of the emulsion is 48 ± 3%, and the glass transition temperature is 24 - 28 °C.

[0036] Among them, the pigment and filler are a mixture of phthalocyanine blue, realgar, fumed silica, and barium sulfate.

[0037] Among them, the additives are one or more of wetting agent, dispersant, defoaming agent, preservative, film-forming agent, thickener, leveling agent, and preservative.

[0038] A preparation method of the anti-corrosion and heat-insulating material comprises the following steps: S1. According to the above raw material ratio, add the mixture of phthalocyanine blue, realgar, fumed silica, and barium sulfate to deionized water, gradually increase the stirring speed until 1300 revolutions per minute, stir for 40 minutes, and add 60% of the additives to obtain a uniformly dispersed mixture; S2. Add nano-porous silica aerogel, organosilicon-modified acrylic emulsion, graphene, and carbon nanotubes to the mixture in sequence, and stir for 30 minutes; S3. Reduce the stirring rate to 800 revolutions per minute, add the remaining 40% of the additives and barium sulfate, and continue stirring for 30 minutes to obtain a uniform coating; S4. Add the mixture of expanded microspheres with nanoporous silica aerogel and hollow glass microspheres to the coating, and continue stirring until the composite microspheres are evenly dispersed in the coating; S5. Subject the stirred coating to vacuum treatment to remove air bubbles and improve the density and heat insulation performance of the coating; S6. Spray or brush the treated coating, and wait for it to dry naturally or by heating to form an anti-corrosion and heat-insulating coating. Example 3

[0039] An anti-corrosion and heat-insulating material, by weight, comprises the following components: 2 parts of graphene, 10 parts of composite microspheres, 20 parts of barium sulfate, 20 parts of film-forming resin, 30 parts of pigment and filler, 5 parts of additives, and 35 parts of deionized water.

[0040] Among them, the composite microspheres are a mixture of expanded microspheres and hollow glass microspheres. The average particle size of the expanded microspheres is 15 - 40 μm, and the density is 0.01 - 0.5 g / cm³; the average particle size of the hollow glass microspheres is 15 - 75 μm, and the density is 0.15 - 0.3 g / cm³.

[0041] Among them, the fineness of barium sulfate is 1000 - 4000 mesh.

[0042] Among them, the film-forming resin is an organosilicon-modified acrylic emulsion, the solid content of the emulsion is 48 ± 3%, and the glass transition temperature is 24 - 28 °C.

[0043] Among them, the pigment and filler is a mixture of cinnabar, heavy calcium carbonate, rare earth metal oxides, and bentonite.

[0044] Among them, the additives are one or several of wetting agents, dispersants, defoaming agents, preservatives, film-forming agents, thickeners, leveling agents, and preservatives.

[0045] A preparation method of the anti-corrosion and heat-insulating material, comprising the following steps: S1. According to the above raw material ratio, add the mixture of cinnabar, heavy calcium carbonate, rare earth metal oxides, and bentonite to deionized water, gradually increase the stirring speed until 1300 revolutions per minute, stir for 40 minutes, and add 60% of the additives to obtain a uniformly dispersed mixture; S2. Add nanoporous silica aerogel, organosilicon-modified acrylic emulsion, and graphene to the mixture in sequence, and stir for 30 minutes; S3. Reduce the stirring rate to 800 revolutions per minute, add the remaining 40% of the additives and barium sulfate, and continue stirring for 30 minutes to obtain a uniform coating; S4. Add the mixture of expanded microspheres with nanoporous silica aerogel and hollow glass microspheres to the coating, and continue stirring until the composite microspheres are evenly dispersed in the coating; S5. Vacuum-treat the stirred coating to remove air bubbles and improve the density and heat insulation performance of the coating; S6. Spray or brush the treated coating and wait for it to dry naturally or by heating to form an anti-corrosion and heat insulation coating.

[0046] The coatings configured and sprayed or brushed on the samples in Examples 1 - 3 were cured for 7 days respectively, and then the anti-corrosion and heat insulation performance data of the surfaces of the three samples were detected respectively. The test results are shown in Table 1 below.

[0047]

[0048] It can be seen from the test results of the performance indicators in Table 1 that the anti-corrosion and heat insulation coatings in Examples 1 - 3 have high solar reflectance, high insulation, good acid resistance, alkali resistance, heat resistance and other properties, excellent anti-corrosion and heat insulation performance, and appropriate gloss effect at the same time.

[0049] The above examples are only used to illustrate the technical solutions of the present invention and are not intended to limit it; although the present invention has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing examples, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the present invention in each example.

Claims

1. An anticorrosion and heat-insulating material, characterized in that: By weight, it includes the following components: 0.1-4 parts of graphene, 5-15 parts of composite microspheres, 10-30 parts of barium sulfate, 10-30 parts of film-forming resin, 18-45 parts of pigments and fillers, 1-8 parts of additives and 20-50 parts of deionized water.

2. The anticorrosion and heat-insulating material according to claim 1, characterized in that: The composite microspheres are a mixture of expanded microspheres and hollow glass microspheres; The average particle size of expanded microspheres is 15-40μm, and the density is 0.01-0.5g / cm³; the average particle size of hollow glass microspheres is 15-75μm, and the density is 0.15-0.3g / cm³.

3. The anticorrosion and heat-insulating material according to claim 1, characterized in that: The barium sulfate fineness is 1000-4000 mesh; The film-forming resin is an organic silicon-modified acrylic emulsion, the solid content of the emulsion is 48±3%, and the glass transition temperature is 24-28°C.

4. The anticorrosion and heat-insulating material according to claim 1, characterized in that: The pigment filler is a mixture of two or more of rutile titanium dioxide, phthalocyanine blue, yellow iron oxide, cinnabar, realgar, fumed white carbon black, heavy calcium carbonate, rare earth metal oxide, bentonite, talcum powder and barium sulfate.

5. The anticorrosion and heat-insulating material according to claim 1, characterized in that: The auxiliary agent is one or more of a wetting agent, a dispersant, a defoaming agent, a preservative, a film former, a thickener, a leveling agent and a preservative.

6. The method for preparing the anticorrosion and heat-insulating material according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Add all pigments and fillers into deionized water, gradually increase the stirring speed to 1300 rpm, stir for 40 minutes, add 60% of additives to obtain a uniformly dispersed mixture; S2, adding film-forming resin and graphene to the mixed solution in sequence, and stirring for 30 minutes; S3, reduce the stirring rate to 800 rpm, add the remaining 40% of the additive and barium sulfate, and continue stirring for 30 minutes to obtain a uniform coating; S4, adding the composite microspheres into the coating, and continuing to stir until the composite microspheres are evenly dispersed in the coating; S5. Vacuum the stirred coating to remove air bubbles and improve the compactness and heat insulation performance of the coating; S6. Spray or brush the treated paint, and wait for it to dry naturally or heat-dry to form an anti-corrosion and heat-insulating coating.

7. The method for preparing an anticorrosive heat-insulating material according to claim 6, characterized in that: In step S2, nanoporous silica aerogel is added before adding the film-forming resin.

8. The method for preparing an anticorrosive heat-insulating material according to claim 7, characterized in that: Nanoporous silica aerogel is used as part of composite microspheres or added alone to enhance thermal insulation.

9. The method for preparing an anticorrosive and heat-insulating material according to claim 6, characterized in that: In step S2, carbon nanotubes are added after graphene is added.

10. An application of an anticorrosion and heat-insulating material, characterized in that: It is the anti-corrosion and heat-insulating material described in any one of claims 1 to 9, which is applied to a plate as an anti-corrosion and heat-insulating layer.

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