Titanium porcelain surface heavy anti-corrosion coating and preparation method thereof

Abstract

The invention discloses a titanium porcelain surface heavy-duty anti-corrosion coating and a preparation method thereof, and relates to the technical field of heavy-duty anti-corrosion coatings, the titanium porcelain surface heavy-duty anti-corrosion coating comprises a component A and a component B, the component A is prepared from the following components in parts by weight: 10 to 20 parts of isocyanate; the component B is prepared from the following components in parts by weight: 50 to 70 parts of amino modified polyether polyol, 5 to 10 parts of low molecular weight hydrocarbon resin, 8 to 12 parts of modified silica sol, 30 to 50 parts of phosphorus titanium powder, 0.5 to 2 parts of thixotropic agent, 0.2 to 1.0 part of dispersing agent, 1 to 5 parts of catalyst and 0.5 to 1.5 parts of curing agent; wherein the hydrocarbon resin is at least one of hydrocarbon resin a with the hydroxyl content of 1.7-2.2% and the viscosity of 300-400, hydrocarbon resin b with the hydroxyl content of 1.3-2.8% and the viscosity of 500-600 and hydrocarbon resin c with the hydroxyl content of 7.0-7.6% and the viscosity of 800-1000. The titanium porcelain surface heavy anti-corrosion coating has the effect of realizing long-acting acid resistance, alkali resistance, solvent resistance and long-term effective self-cleaning.

Description

Technical Field

[0001] The present application relates to the technical field of heavy-duty anti-corrosion coatings, and in particular to a heavy-duty anti-corrosion coating for titanium ceramic surfaces and a preparation method thereof. Background Art

[0002] Heavy-duty anti-corrosion coatings refer to a type of anti-corrosion coating that can be used in relatively harsh corrosive environments and has a longer protection period than conventional anti-corrosion coatings.

[0003] At present, heavy-duty anti-corrosion coatings have the following two significant features: first, the paint film is relatively thick, generally greater than 100μm to be able to isolate the anti-corrosion medium, and the paint film is required to have sufficient density to ensure that the corrosive medium is difficult to penetrate into the substrate and then corrode the substrate. Second, it is used under more stringent conditions and has a long anti-corrosion life. Therefore, heavy-duty anti-corrosion coatings are generally used in marine environments and petrochemical environments, and their service life is required to be more than 15 years.

[0004] Due to the excellent protective performance of heavy-duty anti-corrosion coatings, they are widely used in containers, ships, petrochemicals, railways, bridges, electricity, sewage treatment, water conservancy projects, metal structures and chemical reaction equipment in today's economic life. Therefore, a new type of independently designed coating is urgently needed. Summary of the invention

[0005] In view of this, the first purpose of this application is to provide a titanium ceramic surface heavy anti-corrosion coating to achieve the purpose of long-term acid resistance, alkali resistance, solvent resistance and self-cleaning. The specific scheme is as follows: A titanium ceramic surface heavy-duty anticorrosive coating, comprising component A and component B; The A component includes 10-20 parts by weight of isocyanate; The B component includes 50-70 parts by weight of amino-modified polyether polyol, 5-10 parts of low molecular weight hydrocarbon resin, 8-12 parts of modified silica sol, 30-50 parts of phosphorus titanium powder, 0.5-2 parts of thixotropic agent, 0.2-1.0 parts of dispersant, 1-5 parts of catalyst and 0.5-1.5 parts of curing agent; The low molecular weight hydrocarbon resin is at least one of hydrocarbon resin a having a hydroxyl content of 1.7-2.2% and a viscosity of 300-400, hydrocarbon resin b having a hydroxyl content of 1.3-2.8% and a viscosity of 500-600, and hydrocarbon resin c having a hydroxyl content of 7.0-7.6% and a viscosity of 800-1000.

[0006] Preferably, the amino-modified polyether polyol is at least one of JEFFAMINE D-2000, JEFFAMINE D-5000 and JEFFAMINE D-400.

[0007] Preferably, the thixotropic agent is at least one of hydrogenated castor oil, organic bentonite and magnesium aluminum silicate.

[0008] Preferably, the dispersant is at least one of the cationic surfactants alkyl quaternary ammonium salt, aminopropylamine dioleate quaternary ammonium salt, and polyaminoamide phosphate.

[0009] Preferably, the catalyst is one of dibutyltin dilaurate and stannous octoate.

[0010] Preferably, the curing agent is one of glycidyl ether diethylenetriamine adduct, ethylenediamine, low molecular weight polyphthalamide resin and polyphthalamide.

[0011] Preferably, the isocyanate is at least one of MDI prepolymer, -NCO semi-prepolymer and IPDI semi-prepolymer.

[0012] Preferably, the isocyanate is an amino-modified isocyanate, and its chemical formula is as follows: ; Among them, R1 and R2 are independently -H and -N2(CH3) respectively; R3 and R4 are independently -H and -N2(CH3) respectively.

[0013] The second object of the present invention is to provide a method for preparing a titanium ceramic surface heavy anti-corrosion coating, which is used to prepare the titanium ceramic surface heavy anti-corrosion coating as described above, comprising the following steps: Step 1, weighing isocyanate as component A by weight, and weighing amino-modified polyether polyol and low molecular weight hydrocarbon resin by weight, putting them into a reaction kettle and mixing them, and controlling the temperature of the reaction kettle to 50° C. and the mixing time to 20 min to obtain a primary mixed material; Step 2: adding a dispersant to the primary mixed material and continuing to mix evenly to obtain a secondary mixed material; Step 3, adding modified silica sol and thixotropic agent into the secondary mixed material, and continuing to mix until the viscosity increases, and the mixing time is greater than 20 minutes, to obtain a mixed viscous material; Step 4: Add phosphorus and titanium powder into the mixed material, and continue mixing until there are no particles or lumps, to obtain a dispersed material with a fineness of less than or equal to 50 μm; Step 5: Add the catalyst and curing agent into the dispersed material and continue stirring until the mixture is uniformly mixed, and cool to obtain component B.

[0014] Preferably: in step 1, the speed of the reactor is controlled to be 800 r / min; in step 2, the speed of the reactor is controlled to be 1200 r / min; in step 3, the speed of the reactor is controlled to be 2000 r / min; in step 4, the speed of the reactor is controlled to be 2500 r / min; in step 5, the speed of the reactor is controlled to be 1200 r / min.

[0015] It can be seen from the above scheme that the present application provides a titanium ceramic surface heavy anti-corrosion coating and a preparation method thereof, and the preparation method of the titanium ceramic surface heavy anti-corrosion coating has the effects of convenient operation and simple process; the titanium ceramic surface heavy anti-corrosion coating optimizes the composition of component A and component B, so that the isocyanate of component A forms polyurea in the polymerization with the amino-modified polyether polyol of component B, and under the synergistic effect with hydrocarbon resin and phosphorus titanium powder, significantly improves the density, continuity and connection seam effect of the soil layer formed during use, thereby forming an effective protective effect on the coated object. At the same time, the modified silica sol and thixotropic agent used have the effect of promoting the flat paving of polyurea and obtaining a flat structural paint film, and when the paint film obtained by using the titanium ceramic surface heavy anti-corrosion coating will have the effect of a porcelain surface after drying and forming, and achieves an effective chemical corrosion resistance effect. DETAILED DESCRIPTION

[0016] The following will be clearly and completely described in conjunction with the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] It should be mentioned that the modified silica sol in the examples of the present application is a modified silica sol - a high stability acidic silica sol mSiO2.nH2O purchased from Yangguan Silica Sol Factory in Shenyang.

[0018] The titanium ceramic surface heavy-duty anti-corrosion coating and its preparation method of the present application will be described in detail below.

[0019] A heavy-duty anticorrosive coating for titanium ceramic surfaces comprises component A and component B. Component A comprises 10-20 parts by weight of isocyanate. Component B comprises 50-70 parts by weight of amino-modified polyether polyol, 5-10 parts of low molecular weight hydrocarbon resin, 8-12 parts of modified silica sol, 30-50 parts of phosphorus titanium powder, 0.5-2 parts of thixotropic agent, 0.2-1.0 parts of dispersant, 1-5 parts of catalyst and 0.5-1.5 parts of curing agent.

[0020] The low molecular weight hydrocarbon resin is at least one of hydrocarbon resin a having a hydroxyl content of 1.7-2.2% and a viscosity of 300-400, hydrocarbon resin b having a hydroxyl content of 1.3-2.8% and a viscosity of 500-600, and hydrocarbon resin c having a hydroxyl content of 7.0-7.6% and a viscosity of 800-1000.

[0021] The amino-modified polyether polyol is at least one of JEFFAMINE D-2000, JEFFAMINE D-5000 and JEFFAMINE D-400. The thixotropic agent is at least one of hydrogenated castor oil, organic bentonite and magnesium aluminum silicate. The dispersant is at least one of cationic surfactant alkyl quaternary ammonium salt, aminopropylamine dioleate quaternary ammonium salt and polyaminoamide phosphate. The catalyst is one of dibutyltin dilaurate and stannous octoate. The curing agent is one of glycidyl ether diethylenetriamine adduct, ethylenediamine, low molecular weight polyphthalamide resin and polyphthalamide.

[0022] A method for preparing a heavy-duty anti-corrosion coating for titanium ceramic surfaces, which is used to prepare the heavy-duty anti-corrosion coating for titanium ceramic surfaces as described above, comprises the following steps: Step 1, weighing isocyanate as component A by weight, and weighing amino-modified polyether polyol and low molecular weight hydrocarbon resin by weight, putting them into a reaction kettle and mixing them, and controlling the temperature of the reaction kettle to 50° C. and the mixing time to 20 min to obtain a primary mixed material; Step 2: adding a dispersant to the primary mixed material and continuing to mix evenly to obtain a secondary mixed material; Step 3, adding modified silica sol and thixotropic agent into the secondary mixed material, and continuing to mix until the viscosity increases, and the mixing time is greater than 20 minutes, to obtain a mixed viscous material; Step 4: Add phosphorus and titanium powder into the mixed material, and continue mixing until there are no particles or lumps, to obtain a dispersed material with a fineness of less than or equal to 50 μm; Step 5: Add the catalyst and curing agent into the dispersed material and continue stirring until the mixture is uniformly mixed, and cool to obtain component B.

[0023] It should be mentioned that in step 1 of the preparation method of the titanium ceramic surface heavy anti-corrosion coating, the rotation speed of the reactor is controlled to be 800r / min. In step 2, the rotation speed of the reactor is controlled to be 1200r / min. In step 3, the rotation speed of the reactor is controlled to be 2000r / min. In step 4, the rotation speed of the reactor is controlled to be 2500r / min. In step 5, the rotation speed of the reactor is controlled to be 1200r / min.

[0024] Embodiment 1 A heavy-duty anticorrosive coating for titanium ceramic surfaces comprises component A and component B. Component A comprises 10 parts by weight of MDI prepolymer. Component B comprises 40 parts by weight of JEFFAMINE D-2000, 10 parts by weight of JEFFAMINE D-5000, 5 parts by weight of hydrocarbon resin B, 8 parts by weight of modified silica sol, 30 parts by weight of phosphorus titanium powder, 0.5 parts by weight of magnesium aluminum silicate, 0.2 parts by weight of alkyl quaternary ammonium salt, 1 part by weight of dibutyltin dilaurate and 0.5 parts by weight of ethylenediamine.

[0025] A method for preparing a heavy-duty anti-corrosion coating for titanium ceramic surfaces, which is used to prepare the heavy-duty anti-corrosion coating for titanium ceramic surfaces as described above, comprises the following steps: Step 1, weighing MDI prepolymer as component A, and weighing JEFFAMINE D-2000, JEFFAMINE D-5000, and hydrocarbon resin b in parts by weight, putting them into a reactor and mixing them, and controlling the temperature of the reactor to 50° C., the speed of the reactor to 800 r / min, and the mixing time to 20 min to obtain a primary mixed material; Step 2, adding alkyl quaternary ammonium salt into the primary mixed material, and continuing to mix evenly, controlling the speed of the reactor to 1200r / min, to obtain a secondary mixed material; Step 3, adding modified silica sol and magnesium aluminum silicate into the secondary mixed material, and continuing to mix until the viscosity increases, controlling the speed of the reactor to 2000 r / min, and the mixing time to be greater than 20 min, to obtain a mixed viscous material; Step 4: Add phosphorus titanium powder into the mixed material, and continue mixing until there are no particles or lumps, control the speed of the reactor to 2500r / min, and obtain a dispersed material with a fineness of less than or equal to 50μm; Step 5: Add dibutyltin dilaurate and ethylenediamine into the dispersed material and continue stirring until the mixture is uniformly mixed. Control the speed of the reactor to 1200 r / min, cool and obtain component B.

[0026] Embodiment 2 A heavy-duty anticorrosive coating for titanium ceramic surfaces comprises component A and component B. Component A comprises 15 parts by weight of MDI prepolymer. Component B comprises 50 parts by weight of JEFFAMINE D-2000, 15 parts by weight of JEFFAMINE D-5000, 8 parts by weight of hydrocarbon resin B, 10 parts by weight of modified silica sol, 40 parts by weight of phosphorus titanium powder, 1 part by weight of magnesium aluminum silicate, 0.5 parts by weight of alkyl quaternary ammonium salt, 3 parts by weight of dibutyltin dilaurate and 1 part by weight of ethylenediamine.

[0027] A method for preparing a heavy-duty anti-corrosion coating for titanium ceramic surfaces, which is used to prepare the heavy-duty anti-corrosion coating for titanium ceramic surfaces as described above, comprises the following steps: Step 1, weighing MDI prepolymer as component A, and weighing JEFFAMINE D-2000, JEFFAMINE D-5000, and hydrocarbon resin b in parts by weight, putting them into a reactor and mixing them, and controlling the temperature of the reactor to 50° C., the speed of the reactor to 800 r / min, and the mixing time to 20 min to obtain a primary mixed material; Step 2, adding alkyl quaternary ammonium salt into the primary mixed material, and continuing to mix evenly, controlling the speed of the reactor to 1200r / min, to obtain a secondary mixed material; Step 3, adding modified silica sol and magnesium aluminum silicate into the secondary mixed material, and continuing to mix until the viscosity increases, controlling the speed of the reactor to 2000 r / min, and the mixing time to be greater than 20 min, to obtain a mixed viscous material; Step 4: Add phosphorus titanium powder into the mixed material, and continue mixing until there are no particles or lumps, control the speed of the reactor to 2500r / min, and obtain a dispersed material with a fineness of less than or equal to 50μm; Step 5: Add dibutyltin dilaurate and ethylenediamine into the dispersed material and continue stirring until the mixture is uniformly mixed. Control the speed of the reactor to 1200 r / min, cool and obtain component B.

[0028] Embodiment 3 A heavy-duty anticorrosive coating for titanium ceramic surfaces comprises component A and component B. Component A comprises 20 parts by weight of IPDI prepolymer. Component B comprises 40 parts by weight of JEFFAMINE D-2000, 30 parts by weight of JEFFAMINE D-5000, 10 parts by weight of hydrocarbon resin B, 12 parts by weight of modified silica sol, 50 parts by weight of phosphorus titanium powder, 2 parts by weight of magnesium aluminum silicate, 1.0 part by weight of alkyl quaternary ammonium salt, 5 parts by weight of dibutyltin dilaurate and 1.5 parts by weight of ethylenediamine.

[0029] A method for preparing a heavy-duty anti-corrosion coating for titanium ceramic surfaces, which is used to prepare the heavy-duty anti-corrosion coating for titanium ceramic surfaces as described above, comprises the following steps: Step 1, weighing IPDI prepolymer as component A, and weighing JEFFAMINE D-2000, JEFFAMINE D-5000, and hydrocarbon resin b in parts by weight, putting them into a reactor and mixing them, and controlling the temperature of the reactor to 50° C., the speed of the reactor to 800 r / min, and the mixing time to 20 min to obtain a primary mixed material; Step 2, adding alkyl quaternary ammonium salt into the primary mixed material, and continuing to mix evenly, controlling the speed of the reactor to 1200r / min, to obtain a secondary mixed material; Step 3, adding modified silica sol and magnesium aluminum silicate into the secondary mixed material, and continuing to mix until the viscosity increases, controlling the speed of the reactor to 2000 r / min, and the mixing time to be greater than 20 min, to obtain a mixed viscous material; Step 4: Add phosphorus titanium powder into the mixed material, and continue mixing until there are no particles or lumps, control the speed of the reactor to 2500r / min, and obtain a dispersed material with a fineness of less than or equal to 50μm; Step 5: Add dibutyltin dilaurate and ethylenediamine into the dispersed material and continue stirring until the mixture is uniformly mixed. Control the speed of the reactor to 1200 r / min, cool and obtain component B.

[0030] Embodiment 4 A heavy-duty anticorrosive coating for titanium ceramic surfaces comprises component A and component B. Component A comprises 16.8 parts by weight of amino-modified isocyanate. Component B comprises 50 parts by weight of JEFFAMINE D-2000, 15 parts by weight of JEFFAMINE D-5000, 5 parts by weight of hydrocarbon resin B, 10 parts by weight of modified silica sol, 32.6 parts by weight of phosphorus titanium powder, 0.5 parts by weight of magnesium aluminum silicate, 0.6 parts by weight of alkyl quaternary ammonium salt, 2.4 parts by weight of dibutyltin dilaurate and 1.1 parts by weight of ethylenediamine.

[0031] A method for preparing a heavy-duty anti-corrosion coating for titanium ceramic surfaces, which is used to prepare the heavy-duty anti-corrosion coating for titanium ceramic surfaces as described above, comprises the following steps: Step 1, weighing amino-modified isocyanate as component A by weight, and weighing amino-modified polyether polyol and low molecular weight hydrocarbon resin by weight, putting them into a reaction kettle and mixing them, and controlling the temperature of the reaction kettle to 50° C., controlling the speed of the reaction kettle to 800 r / min, and mixing time to 20 min to obtain a primary mixed material; Step 2, adding alkyl quaternary ammonium salt into the primary mixed material, and continuing to mix evenly, controlling the speed of the reactor to 1200r / min, to obtain a secondary mixed material; Step 3, adding modified silica sol and magnesium aluminum silicate into the secondary mixed material, and continuing to mix until the viscosity increases, controlling the speed of the reactor to 2000 r / min, and the mixing time to be greater than 20 min, to obtain a mixed viscous material; Step 4: Add phosphorus titanium powder into the mixed material, and continue mixing until there are no particles or lumps, control the speed of the reactor to 2500r / min, and obtain a dispersed material with a fineness of less than or equal to 50μm; Step 5: Add dibutyltin dilaurate and ethylenediamine into the dispersed material and continue stirring until the mixture is uniformly mixed. Control the speed of the reactor to 1200 r / min, cool and obtain component B.

[0032] Among them, the chemical formula of amino-modified isocyanate is as follows: ; Among them, R1 and R2 are independently -H and -N2(CH3) respectively; R3 and R4 are independently -H and -N2(CH3) respectively.

[0033] Embodiment 5 The difference between Example 5 and Example 3 is that the isocyanate in Example 5 is -NCO semi-prepolymer.

[0034] Embodiment 6 The difference between Example 6 and Example 3 is that the low molecular weight hydrocarbon resin in Example 6 is hydrocarbon resin a.

[0035] Embodiment 7 The difference between Example 7 and Example 3 is that the low molecular weight hydrocarbon resin in Example 7 is hydrocarbon resin c.

[0036] Embodiment 8 The difference between Example 8 and Example 3 is that the catalyst in Example 8 is stannous octoate.

[0037] Embodiment 9 The difference between Example 9 and Example 3 is that the curing agent in Example 9 is a low molecular weight polyphthalamide resin purchased from Jinan Shuangying Chemical Co., Ltd.

[0038] Embodiment 10 The difference between Example 10 and Example 3 is that the dispersant in Example 10 is aminopropylamine dioleate quaternary ammonium salt.

[0039] Embodiment 11 The difference between Example 11 and Example 3 is that the dispersant in Example 11 is polyaminoamide phosphate.

[0040] Embodiment 12 The difference between Example 12 and Example 3 is that the thixotropic agent in Example 12 is hydrogenated castor oil.

[0041] Embodiment 13 The difference between Example 13 and Example 3 is that the thirteenth embodiment uses organic bentonite as the thirteenth embodiment.

[0042] Comparative Example 1 The difference between Comparative Example 1 and Example 4 is that hydrocarbon resin b is not added in Comparative Example 1.

[0043] Comparative Example 2 The difference between Comparative Example 2 and Example 4 is that the isocyanate in Comparative Example 2 is octadecyl isocyanate.

[0044] Performance Testing: Test steps 1. Take 72 pieces of sandblasted carbon steel plates, remove the dust on the surface of the carbon steel plates and set aside; Test step 2. Divide the carbon steel plate into 6 parts, each part has 12 carbon steel plates, and roll-coat the titanium ceramic surface heavy anti-corrosion coating in Examples 1 to 4 and Comparative Examples 1 and 2 within 20 minutes, control the double sides and side surfaces of the carbon steel plate to be evenly rolled to form a coating film, control the coating film thickness to be 200 μm-220 μm, and obtain a uniformly coated carbon steel plate; Test step 3. Place the uniformly coated carbon steel plate in a standard curing room for 7 days. Take it out and conduct hardness, glossiness, acid resistance, alkali resistance, salt spray resistance and artificial aging resistance tests. The test results are shown in Table 1 below.

[0045] Table 1 Performance test results

[0046] It can be seen from Table 1 above that by combining the isocyanate of the present application with the amino-modified polyether polyol, while having good anti-corrosion performance, both the hardness and glossiness can be improved to a certain extent, and by adding a low molecular weight hydrocarbon resin, the density of the coating film made of the titanium porcelain surface heavy anti-corrosion coating can be promoted, while making it have a smooth structure to form a porcelain surface, and the test performance in the salt spray resistance and artificial aging resistance tests is better than that in Comparative Examples 1 and 2.

[0047] In summary, the present application provides a titanium ceramic surface heavy-duty anti-corrosion coating and a preparation method thereof, the preparation method of the titanium ceramic surface heavy-duty anti-corrosion coating has the effects of convenient operation and simple process; the titanium ceramic surface heavy-duty anti-corrosion coating optimizes the composition of component A and component B, so that the isocyanate of component A forms polyurea in the polymerization with the amino-modified polyether polyol of component B, and under the synergistic effect with hydrocarbon resin and phosphorus titanium powder, significantly improves the density, continuity and connection seam effect of the soil layer formed during use, thereby forming an effective protective effect on the coated object. At the same time, the modified silica sol and thixotropic agent used have the effect of promoting the flattening of polyurea and obtaining a flat structural paint film, and the paint film obtained by using the titanium ceramic surface heavy-duty anti-corrosion coating will have the effect of a porcelain surface after drying and forming, and achieve an effective chemical corrosion resistance effect.

[0048] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods or devices.

[0049] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0050] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A titanium ceramic surface heavy anti-corrosion coating, characterized in that: It includes component A and component B; The component A comprises 10-20 parts by weight of isocyanate; the component B comprises 50-70 parts by weight of amino-modified polyether polyol, 5-10 parts of low molecular weight hydrocarbon resin, 8-12 parts of modified silica sol, 30-50 parts of phosphorus titanium powder, 0.5-2 parts of thixotropic agent, 0.2-1.0 parts of dispersant, 1-5 parts of catalyst and 0.5-1.5 parts of curing agent; The low molecular weight hydrocarbon resin is at least one of hydrocarbon resin a having a hydroxyl content of 1.7-2.2% and a viscosity of 300-400, hydrocarbon resin b having a hydroxyl content of 1.3-2.8% and a viscosity of 500-600, and hydrocarbon resin c having a hydroxyl content of 7.0-7.6% and a viscosity of 800-1000.

2. A titanium ceramic surface heavy anti-corrosion coating according to claim 1, characterized in that: The amino-modified polyether polyol is at least one of JEFFAMINE D-2000, JEFFAMINE D-5000 and JEFFAMINE D-400.

3. A titanium ceramic surface heavy anti-corrosion coating according to claim 1, characterized in that: The thixotropic agent is at least one of hydrogenated castor oil, organic bentonite and magnesium aluminum silicate.

4. A titanium ceramic surface heavy anti-corrosion coating according to claim 1, characterized in that: The dispersant is at least one of the cationic surfactants alkyl quaternary ammonium salt, aminopropylamine dioleate quaternary ammonium salt, and polyaminoamide phosphate.

5. The titanium ceramic surface heavy anti-corrosion coating according to claim 1, characterized in that: The catalyst is one of dibutyltin dilaurate and stannous octoate.

6. The titanium ceramic surface heavy anti-corrosion coating according to claim 1, characterized in that: The curing agent is one of glycidyl ether diethylenetriamine adduct, ethylenediamine, low molecular weight polyphthalamide resin and polyphthalamide.

7. The heavy-duty anticorrosion coating for titanium ceramic surface according to claim 1, characterized in that: The isocyanate is at least one of MDI prepolymer, -NCO semi-prepolymer and IPDI semi-prepolymer.

8. The heavy-duty anticorrosion coating for titanium ceramic surface according to claim 1, characterized in that: The isocyanate is an amino-modified isocyanate, and its chemical formula is as follows: ； Among them, R1 and R2 are independently -H and -N2(CH3) respectively; R3 and R4 are independently -H and -N2(CH3) respectively.

9. A method for preparing a heavy-duty anticorrosion coating for titanium ceramic surfaces, used for preparing the heavy-duty anticorrosion coating for titanium ceramic surfaces as claimed in any one of claims 1 to 8, characterized in that: The steps include: Step 1, weighing isocyanate as component A by weight, and weighing amino-modified polyether polyol and low molecular weight hydrocarbon resin by weight, putting them into a reaction kettle and mixing them, and controlling the temperature of the reaction kettle to 50° C. and the mixing time to 20 min to obtain a primary mixed material; Step 2: adding a dispersant to the primary mixed material and continuing to mix evenly to obtain a secondary mixed material; Step 3, adding modified silica sol and thixotropic agent into the secondary mixed material, and continuing to mix until the viscosity increases, and the mixing time is greater than 20 minutes, to obtain a mixed viscous material; Step 4: Add phosphorus and titanium powder into the mixed material, and continue mixing until there are no particles or lumps, to obtain a dispersed material with a fineness of less than or equal to 50 μm; Step 5: Add the catalyst and curing agent into the dispersed material and continue stirring until the mixture is uniformly mixed, and cool to obtain component B.

10. The method for preparing a heavy-duty anticorrosive coating for titanium ceramic surface according to claim 9, characterized in that: In step 1, the rotation speed of the reactor is controlled to be 800 r / min; in step 2, the rotation speed of the reactor is controlled to be 1200 r / min; in step 3, the rotation speed of the reactor is controlled to be 2000 r / min; in step 4, the rotation speed of the reactor is controlled to be 2500 r / min; in step 5, the rotation speed of the reactor is controlled to be 1200 r / min.

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