Titanium porcelain surface heavy-duty anticorrosive coating and preparation method thereof

Abstract

The application discloses a titanium porcelain surface heavy-duty anticorrosive paint and a preparation method thereof, and relates to the technical field of heavy-duty anticorrosive paint, and comprises an A component and a B component; the A component comprises 10-20 parts of isocyanate by weight; the B component comprises 50-70 parts 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; wherein the hydrocarbon resin is at least one of hydrocarbon resin a with a hydroxyl content of 1.7-2.2% and a viscosity of 300-400, hydrocarbon resin b with a hydroxyl content of 1.3-2.8% and a viscosity of 500-600 and hydrocarbon resin c with a hydroxyl content of 7.0-7.6% and a viscosity of 800-1000. The application has the effect of obtaining the titanium porcelain surface heavy-duty anticorrosive paint which is long-acting, acid-resistant, alkali-resistant, solvent-resistant and long-term effective self-cleaning.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of heavy-duty anticorrosive paint, in particular to a titanium ceramic heavy-duty anticorrosive paint and a preparation method thereof. BACKGROUND

[0002] Heavy-duty anticorrosive paint refers to a kind of anticorrosive paint which can be applied in relatively harsh corrosive environments and has a longer protection period than conventional anticorrosive paint.

[0003] At present, heavy-duty anticorrosive paint has the following two characteristics: first, the paint film is relatively thick, generally more than 100 microns, which can isolate corrosive media, and the paint film needs to have sufficient compactness to ensure that corrosive media cannot penetrate the substrate and corrode the substrate. The second is that it is used in relatively harsh conditions and has a long-term anticorrosive life, so heavy-duty anticorrosive paint is generally used in marine environments and petrochemical environments, and its service life is required to be more than 15 years.

[0004] Based on the excellent protective performance of heavy-duty anticorrosive paint, heavy-duty anticorrosive paint is widely used in container ships, petrochemical industry, railway, bridge, power, sewage treatment, water conservancy engineering, metal structure and chemical reaction equipment in today's economic life. Therefore, a new type of self-designed paint is urgently needed. SUMMARY

[0005] Therefore, the first purpose of the application is to provide a titanium ceramic heavy-duty anticorrosive paint to achieve the purposes of long-term acid, alkali, solvent and self-cleaning resistance. The specific scheme is as follows:

[0006] A titanium ceramic heavy-duty anticorrosive paint comprises A component and B component;

[0007] The A component comprises 10-20 parts by weight of isocyanate;

[0008] The B component comprises 50-70 parts by weight of amino-modified polyether polyol, 5-10 parts by weight of low molecular weight hydrocarbon resin, 8-12 parts by weight of modified silica sol, 30-50 parts by weight of phosphorus titanium powder, 0.5-2 parts by weight of thixotropic agent, 0.2-1.0 parts by weight of dispersant, 1-5 parts by weight of catalyst and 0.5-1.5 parts by weight of curing agent;

[0009] The low molecular weight hydrocarbon resin is at least one of carbon hydrocarbon resin a with a hydroxyl content of 1.7-2.2% and a viscosity of 300-400, carbon hydrocarbon resin b with a hydroxyl content of 1.3-2.8% and a viscosity of 500-600, and carbon hydrocarbon resin c with a hydroxyl content of 7.0-7.6% and a viscosity of 800-1000.

[0010] Preferably: the amino-modified polyether polyol is at least one of JEFFAMINE D-2000, JEFFAMINE D-5000 and JEFFAMINE D-400.

[0011] Preferably: the thixotropic agent is at least one of hydrogenated castor oil, organic bentonite and magnesium aluminum silicate.

[0012] Preferably: the dispersant is at least one of cationic surfactant alkyl quaternary ammonium salt, amino propyl amido dioleate quaternary ammonium salt and polyamino amide phosphate.

[0013] Preferably: the catalyst is one of dibutyl tin dilaurate and stannous octoate.

[0014] Preferably: the curing agent is one of glycidyl ether diethylene triamine adduct, ethylenediamine, low molecular weight polyphthalamide resin and polyphthalamide.

[0015] Preferably: the isocyanate is at least one of MDI prepolymer, -NCO half-prepolymer and IPDI half-prepolymer.

[0016] Preferably: the isocyanate is an amino-modified isocyanate, and its chemical formula is as follows:

[0017] ;

[0018] Wherein, R1, R2 are independent -H and -N2(CH3) respectively; R3, R4 are independent -H and -N2(CH3) respectively.

[0019] The second object of the present application is to provide a preparation method of titanium porcelain surface heavy-duty coating, for preparing the titanium porcelain surface heavy-duty coating as described above, comprising the following steps:

[0020] Step 1, weigh the isocyanate as component A by weight parts, and weigh the amino-modified polyether polyol and low molecular weight hydrocarbon resin into the reaction kettle for mixing, and control the temperature of the reaction kettle to be 50℃, and the mixing time is 20min, to obtain the primary mixed material;

[0021] Step 2, put the dispersant into the primary mixed material, and continue to mix uniformly to obtain the secondary mixed material;

[0022] Step 3, put the modified silica sol and thixotropic agent into the secondary mixed material, and continue to mix until the viscosity increases, and the mixing time is greater than 20min, to obtain the mixed viscous material;

[0023] Step 4, put the phosphorus titanium powder into the mixed viscous material, and continue to mix until there is no particle and agglomeration, to obtain the dispersed material with a fineness less than or equal to 50μm;

[0024] Step 5, the catalyst and curing agent are put into the dispersion material and the stirring is continued until the mixture is uniform, cooled and the B component is obtained.

[0025] Preferably: in step 1, the rotation speed of the reaction kettle is controlled at 800 r / min; in step 2, the rotation speed of the reaction kettle is controlled at 1200 r / min; in step 3, the rotation speed of the reaction kettle is controlled at 2000 r / min; in step 4, the rotation speed of the reaction kettle is controlled at 2500 r / min; in step 5, the rotation speed of the reaction kettle is controlled at 1200 r / min.

[0026] From the above scheme, it can be seen that the titanium ceramic surface heavy-duty coating and the preparation method thereof are provided. The preparation method of the titanium ceramic surface heavy-duty coating has the effects of convenient operation and simple process. The titanium ceramic surface heavy-duty coating realizes that the isocyanate of the A component forms polyurea with the amino-modified polyether polyol of the B component in polymerization, and significantly improves the compactness, continuity and joint effect of the soil layer formed during use under the synergistic action of the hydrocarbon resin and the phosphorus titanium powder, thereby forming an effective protective effect on the coated object. At the same time, the modified silica sol and the thixotropic agent have the effect of promoting the polyurea to be flat and flat, and obtaining a flat structure paint film. The paint film obtained by using the titanium ceramic surface heavy-duty coating will have the effect of ceramic surface after drying and forming, and the effect of effectively resisting chemical corrosion is realized. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described below in a clear and complete manner. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0028] It should be noted that the modified silica sol in the embodiments of the present application is a modified silica sol-high stability acidic silica sol mSiO2.nH2O purchased from Shenyang Yanggu Silicon Sol Factory.

[0029] The titanium ceramic surface heavy-duty coating and the preparation method thereof will be described in detail below.

[0030] A titanium ceramic surface heavy-duty coating includes an A component and a B component. 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 by weight of low molecular weight hydrocarbon resin, 8-12 parts by weight of modified silica sol, 30-50 parts by weight of phosphorus titanium powder, 0.5-2 parts by weight of thixotropic agent, 0.2-1.0 parts by weight of dispersant, 1-5 parts by weight of catalyst and 0.5-1.5 parts by weight of curing agent.

[0031] wherein the low molecular weight hydrocarbon resin is at least one of a hydrocarbon resin a having a hydroxyl group content of 1.7-2.2% and a viscosity of 300-400, a hydrocarbon resin b having a hydroxyl group content of 1.3-2.8% and a viscosity of 500-600, and a hydrocarbon resin c having a hydroxyl group content of 7.0-7.6% and a viscosity of 800-1000.

[0032] 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 a cationic surfactant alkyl quaternary ammonium salt, amino propyl amido dioleate quaternary ammonium salt, and polyamino amide phosphate. The catalyst is one of dibutyl tin dilaurate and stannous octoate. The curing agent is one of glycidyl ether diethylene triamine adduct, ethylene diamine, low molecular weight polyphthalamide resin, and polyphthalamide.

[0033] A preparation method of a titanium porcelain surface heavy-duty anticorrosive coating, for preparing the titanium porcelain surface heavy-duty anticorrosive coating as described above, comprising the following steps:

[0034] Step 1, weigh the isocyanate as the A component by weight parts, and weigh the amino-modified polyether polyol and the low molecular weight hydrocarbon resin into a reaction kettle for mixing, and control the temperature of the reaction kettle to be 50°C, and the mixing time is 20 min, to obtain a primary mixed material;

[0035] Step 2, pour the dispersant into the primary mixed material, and continue to mix uniformly to obtain a secondary mixed material;

[0036] Step 3, pour the modified silica sol and the thixotropic agent into the secondary mixed material, and continue to mix until the viscosity increases, and the mixing time is greater than 20 min, to obtain a mixed viscosity material;

[0037] Step 4, pour the phosphorus titanium powder into the mixed viscosity material, and continue to mix until there are no particles and agglomerates, to obtain a dispersed material with a fineness of less than or equal to 50 μm;

[0038] Step 5, pour the catalyst and the curing agent into the dispersed material, and continue to stir until mixed uniformly, cool, and obtain the B component.

[0039] It needs to be mentioned that in Step 1 of the preparation method of the titanium porcelain surface heavy-duty anticorrosive coating, the rotation speed of the reaction kettle is controlled to be 800 r / min. In Step 2, the rotation speed of the reaction kettle is controlled to be 1200 r / min. In Step 3, the rotation speed of the reaction kettle is controlled to be 2000 r / min. In Step 4, the rotation speed of the reaction kettle is controlled to be 2500 r / min. In Step 5, the rotation speed of the reaction kettle is controlled to be 1200 r / min.

[0040] Embodiment one

[0041] A titanium porcelain surface heavy-duty anticorrosive paint, comprising A component and B component. The A component comprises 10 parts by weight of MDI prepolymer. The B component comprises 40 parts by weight of JEFFAMINE D-2000, 10 parts of JEFFAMINE D-5000, 5 parts of hydrocarbon resin b, 8 parts of modified silica sol, 30 parts of phosphorus titanium powder, 0.5 parts of magnesium aluminum silicate, 0.2 parts of alkyl quaternary ammonium salt, 1 part of dibutyl tin dilaurate and 0.5 parts of ethylenediamine.

[0042] A preparation method of a titanium porcelain surface heavy-duty anticorrosive paint, for preparing the titanium porcelain surface heavy-duty anticorrosive paint as described above, comprising the following steps:

[0043] Step 1, weigh MDI prepolymer as A component by weight parts, and put JEFFAMINE D-2000, JEFFAMINE D-5000, hydrocarbon resin b into the reaction kettle and mix, control the temperature of the reaction kettle at 50℃, control the rotation speed of the reaction kettle at 800r / min, and the mixing time is 20min, to obtain the primary mixed material;

[0044] Step 2, put alkyl quaternary ammonium salt into the primary mixed material and continue to mix uniformly, control the rotation speed of the reaction kettle at 1200r / min, to obtain the secondary mixed material;

[0045] Step 3, put modified silica sol and magnesium aluminum silicate into the secondary mixed material and continue to mix until the viscosity increases, control the rotation speed of the reaction kettle at 2000r / min, and the mixing time is greater than 20min, to obtain the mixed viscosity material;

[0046] Step 4, put phosphorus titanium powder into the mixed viscosity material and continue to mix until there are no particles and agglomerates, control the rotation speed of the reaction kettle at 2500r / min, to obtain the dispersed material with a fineness less than or equal to 50μm;

[0047] Step 5, put dibutyl tin dilaurate and ethylenediamine into the dispersed material and continue to stir until mixed uniformly, control the rotation speed of the reaction kettle at 1200r / min, cool and obtain the B component.

[0048] Embodiment two

[0049] A titanium porcelain surface heavy-duty anticorrosive paint, comprising A component and B component. The A component comprises 15 parts by weight of MDI prepolymer. The B component comprises 50 parts by weight of JEFFAMINE D-2000, 15 parts of JEFFAMINE D-5000, 8 parts of hydrocarbon resin b, 10 parts of modified silica sol, 40 parts of phosphorus titanium powder, 1 part of magnesium aluminum silicate, 0.5 parts of alkyl quaternary ammonium salt, 3 parts of dibutyl tin dilaurate and 1 part of ethylenediamine.

[0050] A preparation method of a titanium ceramic surface heavy-duty paint, for preparing the titanium ceramic surface heavy-duty paint as described above, comprising the following steps:

[0051] Step 1, weigh MDI prepolymer as component A by weight parts, and weigh JEFFAMINE D-2000, JEFFAMINE D-5000, and hydrocarbon resin b into the reaction kettle and mix, control the temperature of the reaction kettle to be 50°C, control the rotation speed of the reaction kettle to be 800 r / min, and the mixing time is 20 min, to obtain the primary mixed material;

[0052] Step 2, add alkyl quaternary ammonium salt to the primary mixed material and continue to mix uniformly, control the rotation speed of the reaction kettle to be 1200 r / min, to obtain the secondary mixed material;

[0053] Step 3, add modified silica sol and magnesium aluminum silicate to the secondary mixed material and continue to mix until the viscosity increases, control the rotation speed of the reaction kettle to be 2000 r / min, and the mixing time is greater than 20 min, to obtain the mixed and viscous material;

[0054] Step 4, add phosphorus titanium powder to the mixed and viscous material and continue to mix until there are no particles and agglomerates, control the rotation speed of the reaction kettle to be 2500 r / min, to obtain the dispersed material with a fineness of less than or equal to 50 μm;

[0055] Step 5, add dibutyltin dilaurate and ethylenediamine to the dispersed material and continue to stir until mixed uniformly, control the rotation speed of the reaction kettle to be 1200 r / min, cool and obtain component B.

[0056] Example Three

[0057] A titanium ceramic surface heavy-duty paint, comprising component A and component B. Component A comprises 20 parts of IPDI prepolymer by weight parts. Component B comprises 40 parts of JEFFAMINE D-2000, 30 parts of JEFFAMINE D-5000, 10 parts of hydrocarbon resin b, 12 parts of modified silica sol, 50 parts of phosphorus titanium powder, 2 parts of magnesium aluminum silicate, 1.0 parts of alkyl quaternary ammonium salt, 5 parts of dibutyltin dilaurate, and 1.5 parts of ethylenediamine by weight parts.

[0058] A preparation method of a titanium ceramic surface heavy-duty paint, for preparing the titanium ceramic surface heavy-duty paint as described above, comprising the following steps:

[0059] Step 1, take the IPDI prepolymer as the A component by weight parts, and put JEFFAMINE D-2000, JEFFAMINE D-5000, hydrocarbon resin b into the reaction kettle according to weight parts, control the temperature of the reaction kettle to be 50℃, control the rotation speed of the reaction kettle to be 800r / min, and the mixing time is 20min, to obtain the primary mixed material;

[0060] Step 2, put the alkyl quaternary ammonium salt into the primary mixed material, and continue to mix uniformly, control the rotation speed of the reaction kettle to be 1200r / min, to obtain the secondary mixed material;

[0061] Step 3, put the modified silica sol and magnesium aluminum silicate into the secondary mixed material, and continue to mix until the viscosity increases, control the rotation speed of the reaction kettle to be 2000r / min, and the mixing time is greater than 20min, to obtain the mixed viscosity material;

[0062] Step 4, put the phosphorus titanium powder into the mixed viscosity material, and continue to mix until there are no particles and agglomerates, control the rotation speed of the reaction kettle to be 2500r / min, to obtain the dispersion material with a fineness of less than or equal to 50μm;

[0063] Step 5, put dibutyltin dilaurate and ethylenediamine into the dispersion material and continue to stir until mixed uniformly, control the rotation speed of the reaction kettle to be 1200r / min, cool and obtain the B component.

[0064] Example Four

[0065] A titanium porcelain surface heavy-duty corrosion-resistant coating, comprising A component and B component. The A component comprises 16.8 parts by weight of amino-modified isocyanate. The B component comprises 50 parts by weight of JEFFAMINE D-2000, 15 parts of JEFFAMINE D-5000, 5 parts of hydrocarbon resin b, 10 parts of modified silica sol, 32.6 parts of phosphorus titanium powder, 0.5 parts of magnesium aluminum silicate, 0.6 parts of alkyl quaternary ammonium salt, 2.4 parts of dibutyltin dilaurate and 1.1 parts of ethylenediamine.

[0066] A preparation method of a titanium porcelain surface heavy-duty corrosion-resistant coating, for preparing the titanium porcelain surface heavy-duty corrosion-resistant coating as described above, comprising the following steps:

[0067] Step 1, take the amino-modified isocyanate as the A component by weight parts, and put the amino-modified polyether polyol, low molecular weight hydrocarbon resin into the reaction kettle according to weight parts, mix, control the temperature of the reaction kettle to be 50℃, control the rotation speed of the reaction kettle to be 800r / min, and the mixing time is 20min, to obtain the primary mixed material;

[0068] Step 2, put the alkyl quaternary ammonium salt into the primary mixed material, and continue to mix uniformly, control the rotation speed of the reaction kettle to be 1200r / min, to obtain the secondary mixed material;

[0069] Step 3, put modified silica sol and magnesium aluminum silicate into the mixture, and continue to mix until the viscosity increases, control the rotation speed of the reactor at 2000 r / min, and the mixing time is greater than 20 min, to obtain the viscous material;

[0070] Step 4, put phosphotitanic powder into the viscous material, and continue to mix until there are no particles and agglomerates, control the rotation speed of the reactor at 2500 r / min, to obtain the dispersed material with a fineness of less than or equal to 50 μm;

[0071] Step 5, put dibutyltin dilaurate and ethylenediamine into the dispersed material and continue to stir until mixed evenly, control the rotation speed of the reactor at 1200 r / min, cool and obtain component B.

[0072] The chemical formula of the amino-modified isocyanate is as follows:

[0073] ;

[0074] Wherein, R1, R2 are independently -H and -N2(CH3); R3, R4 are independently -H and -N2(CH3).

[0075] Example Five

[0076] The difference between Example Five and Example Three is that the isocyanate in Example Five is an -NCO semi-prepolymer.

[0077] Example Six

[0078] The difference between Example Six and Example Three is that the low molecular weight hydrocarbon resin in Example Six is hydrocarbon resin a.

[0079] Example Seven

[0080] The difference between Example Seven and Example Three is that the low molecular weight hydrocarbon resin in Example Seven is hydrocarbon resin c.

[0081] Example Eight

[0082] The difference between Example Eight and Example Three is that the catalyst in Example Eight is stannous octoate.

[0083] Example Nine

[0084] The difference between Example Nine and Example Three is that the curing agent in Example Nine is a low molecular weight polyphthalamide resin, which is purchased from Jinan Shuangling Chemical Co., Ltd.

[0085] Example Ten

[0086] The difference between Example Ten and Example Three is that the dispersing agent in Example Ten is amino propyl amido dioleate quaternary ammonium salt.

[0087] Example Eleven

[0088] Example Eleven differs from Example Three in that the dispersant in Example Eleven is a polyaminoamide phosphate.

[0089] Example Twelve

[0090] Example Twelve differs from Example Three in that the thixotropic agent in Example Twelve is hydrogenated castor oil.

[0091] Example Thirteen

[0092] Example Thirteen differs from Example Three in that the thixotropic agent in Example Thirteen is organic bentonite.

[0093] Comparative Example One

[0094] Comparative Example One differs from Example Four in that Comparative Example One does not add hydrocarbon resin b.

[0095] Comparative Example Two

[0096] Comparative Example Two differs from Example Four in that the isocyanate in Comparative Example Two is octadecyl isocyanate.

[0097] Performance Test:

[0098] Test Step 1. Take 72 pieces of sandblasted carbon steel plates, remove the dust on the surface of the carbon steel plates for standby;

[0099] Test Step 2. Divide the carbon steel plates into 6 parts, each part has 12 pieces of carbon steel plates, and roll coat the titanium porcelain surface heavy-duty coating in Examples One to Four, Comparative Example One and Comparative Example Two within 20 minutes, control the uniform rolling of the double sides and sides of the carbon steel plates to form a coating film, control the thickness of the coating film to be 200-220 μm, and obtain uniform coating film carbon steel plates;

[0100] Test Step 3. Place the uniform coating film carbon steel plates in a standard curing room for 7 days, and after taking out, test the hardness, gloss, acid resistance, alkali resistance, salt spray resistance and artificial aging resistance, and the test results are shown in Table One.

[0101] Table One Performance Test Results

[0102]

[0103] It can be known from the above table one that by adopting the isocyanate and amino-modified polyether polyol in combination, good corrosion resistance is obtained, and the hardness and gloss are improved to a certain extent. By adding the low molecular weight hydrocarbon resin, the compactness of the coating film formed by the titanium porcelain heavy-duty coating is promoted, the structure is flat, the porcelain surface is formed, and the salt spray resistance and artificial aging resistance are better than those of the comparative examples one and two.

[0104] In conclusion, the titanium porcelain heavy-duty coating and the preparation method thereof are provided. The preparation method has the effects of convenient operation and simple process. By optimizing the composition of the A component and the B component, the isocyanate of the A component and the amino-modified polyether polyol of the B component form polyurea in polymerization, and under the synergistic action of the hydrocarbon resin and the phosphorus titanium powder, the compactness, continuity and joint effect of the soil layer formed during use are significantly improved, thereby forming an effective protective effect on the coated object. At the same time, the modified silica sol and the thixotropic agent promote the flat paving of the polyurea and obtain a flat structure paint film. After drying and forming, the paint film obtained by using the titanium porcelain heavy-duty coating has the effect of porcelain surface and effectively resists chemical corrosion.

[0105] The terms "first", "second", "third", "fourth" and the like in the description used in the specification are used for distinguishing between similar objects talking about. It is understood that the data so distinguished can be interchanged, unless otherwise explicitly provided or required by context. Furthermore, the terms "comprise", "comprising", "include", "including" and "contains", "containing" as well as any variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or apparatus that comprises, includes or contains a list of steps or elements does not include only those steps or elements but can include other not expressly listed steps or elements.

[0106] It should be noted that the description involving "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated, or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0107] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used to help understand the method and its core idea of the present application; meanwhile, for the general technical personnel in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application, and the above description should not be understood as the limitation of the present application.

Claims

1. A titanium ceramic-faced heavy-duty coating characterized by: The titanium porcelain surface heavy-duty anticorrosive coating comprises an A component and a B component; The A component comprises 16.8 parts by weight of isocyanate; and the B component comprises 65 parts by weight of amino-modified polyether polyol, 5 parts by weight of low-molecular-weight hydrocarbon resin, 10 parts by weight of modified silica sol, 32.6 parts by weight of phosphorus titanium powder, 0.5 parts by weight of thixotropic agent, 0.6 parts by weight of dispersant, 2.4 parts by weight of catalyst and 1.1 parts by weight of curing agent; The low-molecular-weight hydrocarbon resin is a hydrocarbon resin b with a hydroxyl content of 1.3-2.8% and a viscosity of 500-600. The preparation method of the coating comprises the following steps: Step 1: weigh the isocyanate as the A component by weight parts, and weigh the amino-modified polyether polyol and low-molecular-weight hydrocarbon resin by weight parts, and mix them in a reaction kettle, and control the temperature of the reaction kettle to be 50°C, and the mixing time is 20 min, to obtain a primary mixed material; Step 2: add the dispersant to the primary mixed material, and continue to mix uniformly to obtain a secondary mixed material; Step 3: add the modified silica sol and thixotropic agent to the secondary mixed material, and continue to mix until the viscosity increases, and the mixing time is greater than 20 min, to obtain a viscosity mixed material; Step 4: add the phosphorus titanium powder to the viscosity mixed material, and continue to mix until there are no particles and agglomerates, to obtain a dispersed material with a fineness of less than or equal to 50 μm; Step 5: add the catalyst and curing agent to the dispersed material and continue to stir until they are uniformly mixed, and then cool to obtain the B component; The isocyanate is an amino-modified isocyanate, and its chemical formula is as follows: ； R1, R2 are independently -H and -N(CH3)2; R3, R4 are independently -H and -N(CH3)2; The amino-modified polyether polyol is 50 parts of JEFFAMINE D-2000 and 15 parts of JEFFAMINE D-5000; The thixotropic agent is magnesium aluminum silicate; The dispersant is a cationic surfactant alkyl quaternary ammonium salt; The catalyst is dibutyl tin dilaurate; The curing agent is ethylenediamine.

2. The preparation method of the titanium ceramic surface heavy-duty paint according to claim 1, characterized in that: In step 1, the rotation speed of the reaction kettle is controlled to be 800 r / min; in step 2, the rotation speed of the reaction kettle is controlled to be 1200 r / min; in step 3, the rotation speed of the reaction kettle is controlled to be 2000 r / min; in step 4, the rotation speed of the reaction kettle is controlled to be 2500 r / min; and in step 5, the rotation speed of the reaction kettle is controlled to be 1200 r / min.

Images