An organic-inorganic hybrid silicone resin anticorrosive coating, its preparation method and application

Abstract

This invention belongs to the field of coating technology and discloses an organic-inorganic hybrid silicone resin anticorrosive coating, its preparation method, and its application. This organic-inorganic hybrid silicone resin anticorrosive coating comprises an organic-inorganic hybrid silicone resin, aluminum chloride, and a silane coupling agent; the organic-inorganic hybrid silicone resin is an organic-inorganic macromolecular mineral polymer bonded by siloxane, graphene oxide, and silane. The coating formed by the organic-inorganic hybrid silicone resin anticorrosive coating of this invention is not prone to peeling or damage, and is resistant to both high temperatures and acid and alkali corrosion. When applied outdoors or in harsh environments, this organic-inorganic hybrid silicone resin anticorrosive coating is also not prone to aging, damage, or peeling.

Description

Technical Field

[0001] This invention belongs to the field of coating technology, and specifically relates to an organic-inorganic hybrid silicone resin anticorrosive coating, its preparation method, and its application. Background Technology

[0002] Anti-corrosion coatings are generally divided into conventional anti-corrosion coatings and heavy-duty anti-corrosion coatings, and are an essential type of paint. Conventional anti-corrosion coatings provide corrosion protection for metals under normal conditions, protecting the service life of non-ferrous metals. Heavy-duty anti-corrosion coatings, compared to conventional anti-corrosion coatings, can be used in relatively harsh corrosive environments and have a longer protection period. Heavy-duty anti-corrosion coatings can generally be used for 10 or 15 years or more in chemical atmospheres and marine environments. Even in acidic, alkaline, saline, and solvent media, and under certain temperature conditions, they can still be used for more than 5 years. Thick film thickness is a key characteristic of heavy-duty anti-corrosion coatings. The dry film thickness of conventional anti-corrosion coatings is around 100μm or 150μm, while the dry film thickness of heavy-duty anti-corrosion coatings is 200μm or 300μm or more, even reaching 500μm to 1000μm, and sometimes as high as 2000μm. It is easy to apply and truly achieves room temperature self-curing of inorganic coatings. When the ambient temperature is 20℃ and the relative humidity is less than 85%, it takes 15 minutes to surface dry and 2 hours to fully dry, which can ensure high-efficiency construction and achieve excellent salt spray resistance and aging resistance.

[0003] The coating is self-healing, protecting against localized scratches caused by external forces. It is unaffected by cutting or welding, and welding with the coating on does not compromise weld quality. The coating exhibits strong adhesion to the substrate; the coating composition contains hydroxyl groups (-OH), and the metal matrix provides positive ions, enabling chemical bonding. Maintained by a spatial network structure, the metal, metal oxide nanomaterials, and rare earth oxide ultrafine powders in the coating composition help form a dense interfacial transition layer, ensuring that its overall thermodynamic properties match those of the substrate.

[0004] Existing coatings have poor resistance to high temperatures and acid and alkali corrosion, making them prone to aging, damage, and peeling when used outdoors or in harsh environments. This makes it impossible to achieve the goal of a high-strength, non-flammable coating that is both resistant to high temperatures and acid and alkali corrosion, thus causing great inconvenience to users.

[0005] Therefore, there is an urgent need to provide a new anti-corrosion coating with good high-temperature resistance and acid and alkali corrosion resistance. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an organic-inorganic hybrid silicone resin anti-corrosion coating, its preparation method, and its application.

[0007] This invention provides an organic-inorganic hybrid silicone resin anticorrosive coating and its preparation method, which solves the problem that existing coatings have poor high temperature resistance and acid and alkali corrosion resistance, which makes them prone to aging, damage and peeling when used outdoors or in harsh environments, and cannot achieve the purpose of a high-strength non-flammable coating that is both resistant to high temperature and acid and alkali corrosion.

[0008] The inventive concept of this invention is as follows: The organic-inorganic hybrid silicone resin anticorrosive coating of this invention contains organic-inorganic hybrid silicone resin, aluminum chloride, and silane coupling agent. Through the use of this organic-inorganic hybrid silicone resin, aluminum chloride, and silane coupling agent, the coating formed by the organic-inorganic hybrid silicone resin anticorrosive coating of this invention is not prone to peeling or damage, and is resistant to both high temperatures and acid and alkali corrosion. When the organic-inorganic hybrid silicone resin anticorrosive coating is applied outdoors or in harsh environments, it is also not prone to aging, damage, or peeling.

[0009] The first aspect of the present invention provides an organic-inorganic hybrid silicone resin anti-corrosion coating.

[0010] Specifically, an organic-inorganic hybrid silicone resin anti-corrosion coating includes an organic-inorganic hybrid silicone resin, aluminum chloride, and a silane coupling agent;

[0011] The organic-inorganic hybrid silicone resin is an organic-inorganic macromolecular mineral polymer bonded by siloxane, graphene oxide and silane.

[0012] Preferably, the method for preparing the organic-inorganic hybrid silicone resin includes: dispersing graphene oxide in water, adjusting the pH to acidic, adding silica sol and mixing, adding alkoxysilane, maintaining the temperature for reaction, dehydrating, and obtaining the organic-inorganic hybrid silicone resin.

[0013] Preferably, the preparation method of the organic-inorganic hybrid silicone resin includes: dispersing 1-2 parts by weight of graphene oxide in water, adjusting the pH to acidic, adding 35-45 parts of silica sol and mixing evenly, controlling the reaction temperature at 35-45℃, slowly adding 50-60 parts of alkoxysilane, maintaining the reaction temperature for 6-8 hours after the addition is completed, and finally dehydrating to obtain the organic-inorganic hybrid silicone resin.

[0014] Preferably, the pH is 2-5, more preferably 3-4.

[0015] Preferably, the alkoxysilane is selected from at least one of methoxysilane, ethoxysilane, propoxysilane, and butoxysilane.

[0016] Preferably, the organic-inorganic hybrid silicone resin anticorrosive coating further includes dibutyl phthalate. The addition of dibutyl phthalate helps to improve the adhesion of the coating formed by the coating.

[0017] Preferably, the organic-inorganic hybrid silicone resin anticorrosive coating further includes anti-rust pigments, inorganic fillers, methyl isobutyl ketone, ketimine, and thickeners.

[0018] Preferably, the anti-rust pigment is selected from one or more of zinc oxide, aluminum tripolyphosphate, or zinc phosphate.

[0019] Preferably, the inorganic filler is selected from two or more of the following: kaolin, mica powder, talc powder, graphite, calcium carbonate, silicon carbide, boron nitride, aluminum carbide, or chromium trioxide.

[0020] Preferably, the thickener is selected from polyurethane, sodium polyacrylate, or polyethylene oxide.

[0021] Preferably, the organic-inorganic hybrid silicone resin anticorrosive coating comprises, by weight, 25-45 parts of organic-inorganic hybrid silicone resin, 2-7 parts of aluminum chloride, and 1-5 parts of silane coupling agent; more preferably, by weight, it comprises 30-40 parts of organic-inorganic hybrid silicone resin, 3-5 parts of aluminum chloride, and 1-3 parts of silane coupling agent.

[0022] Preferably, the organic-inorganic hybrid silicone resin anticorrosive coating, by weight, comprises 30-40 parts of organic-inorganic hybrid silicone resin, 3-5 parts of aluminum chloride, 1-3 parts of silane coupling agent, 5-10 parts of dibutyl phthalate, 5-10 parts of anti-rust pigment, 5-10 parts of methyl isobutyl ketone, 5-10 parts of ketimide, 10-20 parts of inorganic filler, and 1-3 parts of thickener. Controlling the amount of each component is beneficial for obtaining a coating with better anticorrosive performance.

[0023] Preferably, the organic-inorganic hybrid silicone resin anticorrosive coating comprises, by weight, 35 parts of organic-inorganic hybrid silicone resin, 7 parts of anti-rust pigment, 7 parts of dibutyl phthalate, 7 parts of methyl isobutyl ketone, 7 parts of ketimine, 15 parts of inorganic filler, 4 parts of aluminum chloride, 2 parts of thickener, and 2 parts of silane coupling agent.

[0024] Preferably, the organic-inorganic hybrid silicone resin anticorrosive coating comprises, by weight, 30 parts of organic-inorganic hybrid silicone resin, 5 parts of anti-rust pigment, 5 parts of dibutyl phthalate, 5 parts of methyl isobutyl ketone, 5 parts of ketimine, 10 parts of inorganic filler, 3 parts of aluminum chloride, 1 part of thickener, and 1 part of silane coupling agent.

[0025] Preferably, the organic-inorganic hybrid silicone resin anticorrosive coating comprises, by weight, 40 parts of organic-inorganic hybrid silicone resin, 10 parts of anti-rust pigment, 10 parts of dibutyl phthalate, 10 parts of methyl isobutyl ketone, 10 parts of ketimine, 20 parts of inorganic filler, 5 parts of aluminum chloride, 3 parts of thickener, and 3 parts of silane coupling agent.

[0026] A second aspect of the present invention provides a method for preparing an organic-inorganic hybrid silicone resin anticorrosive coating.

[0027] Specifically, a method for preparing an organic-inorganic hybrid silicone resin anticorrosive coating includes the following steps:

[0028] The organic-inorganic hybrid silicone resin anti-corrosion coating is prepared by mixing the components.

[0029] Preferably, the preparation method includes the following steps:

[0030] Organic-inorganic hybrid silicone resin, anti-rust pigment, inorganic filler and aluminum chloride are ground to obtain solid powder;

[0031] Dibutyl phthalate, methyl isobutyl ketone, ketoimine, thickener and silane coupling agent are stirred and mixed to obtain a preliminary mixture;

[0032] The solid powder is added to the initial mixture and stirred to obtain the organic-inorganic hybrid silicone resin anti-corrosion coating.

[0033] More preferably, the preparation method includes the following steps:

[0034] S1. Weigh each component;

[0035] S2. Grinding and screening: The organic-inorganic hybrid silicone resin, anti-rust pigment, inorganic filler and aluminum chloride weighed in step S1 are first ground into powder by grinding equipment and then screened through a 100-120 mesh sieve to collect the screened solid powder.

[0036] S3. Initial mixing treatment: The dibutyl phthalate, methyl isobutyl ketone, ketoimine, thickener and silane coupling agent weighed in step S1 are poured into a mixing and stirring device in sequence, and mixed and stirred for 20-25 minutes at a speed of 500-600 r / min to obtain the initial mixture.

[0037] S4. Compounding treatment: Add the solid powder collected in step S2 to the initial mixture in step S3 and continue mixing and stirring at a speed of 600-800 r / min for 30-40 min to obtain the organic-inorganic hybrid silicone resin anti-corrosion coating.

[0038] S5. Post-processing: After the organic-inorganic hybrid silicone resin anti-corrosion coating obtained in step S4 is filled by filling equipment, it is then sealed, packaged and inspected in sequence to complete the post-processing of the organic-inorganic hybrid silicone resin anti-corrosion coating.

[0039] A third aspect of the present invention provides an application of an organic-inorganic hybrid silicone resin anti-corrosion coating.

[0040] Application of the organic-inorganic hybrid silicone resin anticorrosion coating in the field of corrosion protection.

[0041] Preferably, the application is in the corrosion protection of chemical media or seawater equipment.

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0043] The organic-inorganic hybrid silicone resin anticorrosive coating of this invention contains organic-inorganic hybrid silicone resin, aluminum chloride, and silane coupling agent. Through the use of this organic-inorganic hybrid silicone resin, aluminum chloride, and silane coupling agent, the coating formed by this organic-inorganic hybrid silicone resin anticorrosive coating is resistant to peeling and damage, and is resistant to both high temperatures and acid and alkali corrosion. When applied outdoors or in harsh environments, this organic-inorganic hybrid silicone resin anticorrosive coating is also less prone to aging, damage, and peeling. Detailed Implementation

[0044] To enable those skilled in the art to more clearly understand the technical solutions described in this invention, the following embodiments are provided for illustration. It should be noted that the following embodiments do not constitute a limitation on the scope of protection claimed by this invention.

[0045] Unless otherwise specified, the raw materials, reagents or devices used in the following examples are available from conventional commercial sources or can be obtained by existing known methods.

[0046] Example 1

[0047] An organic-inorganic hybrid silicone resin anticorrosive coating, by weight, comprises: 35 parts of organic-inorganic hybrid silicone resin, 7 parts of anti-rust pigment (2 parts of zinc oxide, 2 parts of aluminum tripolyphosphate and 3 parts of zinc phosphate), 7 parts of dibutyl phthalate, 7 parts of methyl isobutyl ketone, 7 parts of ketimine, 15 parts of inorganic filler (2 parts of kaolin, 2 parts of mica powder, 2 parts of talc powder, 2 parts of graphite, 2 parts of calcium carbonate, 2 parts of silicon carbide, 1 part of boron nitride, 1 part of aluminum carbide and 1 part of chromium trioxide), 4 parts of aluminum chloride, 2 parts of thickener (polyurethane), and 2 parts of silane coupling agent (KH560).

[0048] The preparation method of organic-inorganic hybrid silicone resin includes: dispersing 1 part graphene oxide in water by weight, adjusting the pH to 3, adding 40 parts silica sol and mixing evenly, controlling the reaction temperature at 40℃, slowly adding 55 parts ethoxysilane, keeping the reaction temperature for 6 hours after the addition is completed, and finally dehydrating to obtain organic-inorganic hybrid silicone resin.

[0049] A method for preparing an organic-inorganic hybrid silicone resin anticorrosive coating specifically includes the following steps:

[0050] S1. Weigh each component;

[0051] S2. Grinding and screening: The organic-inorganic hybrid silicone resin, anti-rust pigment, inorganic filler and aluminum chloride weighed in step S1 are first ground into powder by grinding equipment and then screened through a 110-mesh sieve to collect the screened solid powder.

[0052] S3. Initial mixing treatment: The dibutyl phthalate, methyl isobutyl ketone, ketoimine, thickener and silane coupling agent weighed in step S1 are poured into a mixing and stirring device in sequence, and mixed and stirred for 23 minutes at a speed of 550 r / min to obtain the initial mixture.

[0053] S4. Compounding treatment: Add the solid powder collected in step S2 to the initial mixture in step S3 and continue mixing and stirring at a speed of 700 r / min for 35 min to obtain the organic-inorganic hybrid silicone resin anti-corrosion coating.

[0054] S5. Post-processing: After the organic-inorganic hybrid silicone resin anti-corrosion coating obtained in step S4 is filled by filling equipment, it is then sealed, packaged and inspected in sequence to complete the post-processing of the organic-inorganic hybrid silicone resin anti-corrosion coating.

[0055] Example 2

[0056] An organic-inorganic hybrid silicone resin anticorrosive coating, by weight, comprises: 30 parts of organic-inorganic hybrid silicone resin, 5 parts of anti-rust pigment (2 parts of zinc oxide, 3 parts of aluminum tripolyphosphate), 5 parts of dibutyl phthalate, 5 parts of methyl isobutyl ketone, 5 parts of ketimine, 10 parts of inorganic filler (2 parts of kaolin, 2 parts of mica powder, 2 parts of talc powder, 2 parts of graphite and 2 parts of calcium carbonate), 3 parts of aluminum chloride, 1 part of thickener (sodium polyacrylate), and 1 part of silane coupling agent (KH570).

[0057] The preparation method of organic-inorganic hybrid silicone resin includes: dispersing 1.5 parts by weight of graphene oxide in water, adjusting the pH to 4, adding 42 parts of silica sol and mixing evenly, controlling the reaction temperature at 40℃, slowly adding 53 parts of methoxysilane, keeping the reaction temperature for 7.5 hours after the addition is completed, and finally dehydrating to obtain organic-inorganic hybrid silicone resin.

[0058] A method for preparing an organic-inorganic hybrid silicone resin anticorrosive coating specifically includes the following steps:

[0059] S1. Weigh each component;

[0060] S2. Grinding and screening: The organic-inorganic hybrid silicone resin, anti-rust pigment, inorganic filler and aluminum chloride weighed in step S1 are first ground into powder by grinding equipment and then screened through a 100-mesh sieve to collect the screened solid powder.

[0061] S3. Initial mixing treatment: The dibutyl phthalate, methyl isobutyl ketone, ketoimine, thickener and silane coupling agent weighed in step S1 are poured into a mixing and stirring device in sequence, and mixed and stirred for 20 minutes at a speed of 500 r / min to obtain the initial mixture.

[0062] S4. Compounding treatment: Add the solid powder collected in step S2 to the initial mixture in step S3 and continue mixing and stirring at a speed of 600 r / min for 30 min to obtain the organic-inorganic hybrid silicone resin anti-corrosion coating.

[0063] S5. Post-processing: After the organic-inorganic hybrid silicone resin anti-corrosion coating obtained in step S4 is filled by filling equipment, it is then sealed, packaged and inspected in sequence to complete the post-processing of the organic-inorganic hybrid silicone resin anti-corrosion coating.

[0064] Example 3

[0065] An organic-inorganic hybrid silicone resin anticorrosive coating, by weight, comprises: 40 parts of organic-inorganic hybrid silicone resin, 10 parts of anti-rust pigments (5 parts of zinc oxide and 5 parts of zinc phosphate), 10 parts of dibutyl phthalate, 10 parts of methyl isobutyl ketone, 10 parts of ketimine, 20 parts of inorganic fillers (5 parts of silicon carbide, 5 parts of boron nitride, 5 parts of aluminum carbide, and 5 parts of chromium trioxide), 5 parts of aluminum chloride, 3 parts of thickener (polyethylene oxide), and 3 parts of silane coupling agent.

[0066] The preparation method of organic-inorganic hybrid silicone resin includes: dispersing 1.8 parts by weight of graphene oxide in water, adjusting the pH to 4, adding 46 parts of silica sol and mixing evenly, controlling the reaction temperature at 45℃, slowly adding 57 parts of ethoxysilane, keeping the reaction temperature for 6.5 hours after the addition is completed, and finally dehydrating to obtain organic-inorganic hybrid silicone resin.

[0067] A method for preparing an organic-inorganic hybrid silicone resin anticorrosive coating specifically includes the following steps:

[0068] S1. Weigh each component;

[0069] S2. Grinding and screening: The organic-inorganic hybrid silicone resin, anti-rust pigment, inorganic filler and aluminum chloride weighed in step S1 are first ground into powder by grinding equipment and then screened through a 120-mesh sieve to collect the screened solid powder.

[0070] S3. Initial mixing treatment: The dibutyl phthalate, methyl isobutyl ketone, ketoimine, thickener and silane coupling agent weighed in step S1 are poured into a mixing and stirring device in sequence, and mixed and stirred for 25 minutes at a speed of 600 r / min to obtain the initial mixture.

[0071] S4. Compounding treatment: Add the solid powder collected in step S2 to the initial mixture in step S3 and continue mixing and stirring at a speed of 800 r / min for 40 min to obtain the organic-inorganic hybrid silicone resin anti-corrosion coating.

[0072] S5. Post-processing: After the organic-inorganic hybrid silicone resin anti-corrosion coating obtained in step S4 is filled by filling equipment, it is then sealed, packaged and inspected in sequence to complete the post-processing of the organic-inorganic hybrid silicone resin anti-corrosion coating.

[0073] Example 4

[0074] Compared with Example 1, the only difference of Example 4 is that it does not contain dibutyl phthalate; the other components and preparation process are the same as those of Example 1.

[0075] Comparative Example 1

[0076] Compared with Example 1, in Comparative Example 1, an equal amount of silicone resin was used instead of the organic-inorganic hybrid silicone resin in Example 1, and the remaining components and preparation process were the same as in Example 1.

[0077] Comparative Example 2

[0078] Compared with Example 1, Comparative Example 2 differs only in that it does not contain aluminum chloride; the remaining components and preparation process are the same as in Example 1.

[0079] Comparative Example 3

[0080] Compared with Example 1, the only difference of Comparative Example 3 is that it does not contain the silane coupling agent KH560; the other components and preparation process are the same as those of Example 1.

[0081] Product effectiveness test

[0082] The anti-corrosion coatings prepared in Examples 1-4 and Comparative Examples 1-3 were subjected to relevant performance tests. The test methods and results are shown in Table 1.

[0083] Table 1

[0084]

[0085] As shown in Table 1, when organic-inorganic hybrid silicone resin, aluminum chloride, and silane coupling agent are used simultaneously in the anti-corrosion coating, the resulting coating exhibits good high-temperature resistance and corrosion resistance.

Claims

1. An organic-inorganic hybrid silicone resin anticorrosive coating, characterized in that, By weight, it includes 30-40 parts of organic-inorganic hybrid silicone resin, 3-5 parts of aluminum chloride, 1-3 parts of silane coupling agent and 5-10 parts of dibutyl phthalate. The organic-inorganic hybrid silicone resin is an inorganic macromolecular mineral polymer bonded by siloxane, graphene oxide and silane. The preparation method of the organic-inorganic hybrid silicone resin includes: dispersing graphene oxide in water, adjusting the pH to acidic, adding silica sol and mixing, adding alkoxysilane, keeping it at a certain temperature for reaction, dehydrating, and obtaining the organic-inorganic hybrid silicone resin.

2. The organic-inorganic hybrid silicone resin anticorrosive coating according to claim 1, characterized in that, The preparation method of the organic-inorganic hybrid silicone resin includes: dispersing 1-2 parts by weight of graphene oxide in water, adjusting the pH to acidic, adding 35-45 parts of silica sol and mixing, controlling the reaction temperature at 35-45℃, adding 50-60 parts of alkoxysilane dropwise, keeping the reaction temperature for 6-8 hours after the dropwise addition is completed, and finally dehydrating to obtain the organic-inorganic hybrid silicone resin.

3. The organic-inorganic hybrid silicone resin anticorrosive coating according to claim 1, characterized in that, The organic-inorganic hybrid silicone resin anticorrosive coating also includes anti-rust pigments, inorganic fillers, methyl isobutyl ketone, ketimine, and thickeners.

4. The organic-inorganic hybrid silicone resin anticorrosive coating according to claim 3, characterized in that, The organic-inorganic hybrid silicone resin anticorrosive coating, by weight, comprises 30-40 parts of organic-inorganic hybrid silicone resin, 3-5 parts of aluminum chloride, 1-3 parts of silane coupling agent, 5-10 parts of dibutyl phthalate, 5-10 parts of anti-rust pigment, 5-10 parts of methyl isobutyl ketone, 5-10 parts of ketimine, 10-20 parts of inorganic filler, and 1-3 parts of thickener.

5. The method for preparing the organic-inorganic hybrid silicone resin anticorrosive coating according to any one of claims 1-4, characterized in that, Includes the following steps: The organic-inorganic hybrid silicone resin anti-corrosion coating is prepared by mixing the components.

6. The preparation method according to claim 5, characterized in that, Includes the following steps: Organic-inorganic hybrid silicone resin, anti-rust pigment, inorganic filler and aluminum chloride are ground to obtain solid powder; Dibutyl phthalate, methyl isobutyl ketone, ketoimine, thickener and silane coupling agent are stirred and mixed to obtain a preliminary mixture; The solid powder is added to the initial mixture and stirred to obtain the organic-inorganic hybrid silicone resin anti-corrosion coating.

7. The application of the organic-inorganic hybrid silicone resin anticorrosive coating according to any one of claims 1-4 in the field of corrosion protection.

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