Preparation method and application of two-component high-performance strippable protective coating

Abstract

The application discloses a kind of two-component high-performance peelable protective coatings, by weight parts, including the following raw materials: 80-100 parts A component and 20-30 parts B component, A component includes: hyperbranched resin, acrylic dispersion 1, acrylic dispersion 2, impact resistance functional agent, leveling agent etc., B component is isocyanate curing agent, containing diphenyl, unsaturated long-chain olefin structure impact resistance functional agent is involved in the preparation of coating, improve the mechanical properties of coating and matrix structure strength, can synergistically improve the water resistance of matrix with anti-aging agent Water resistance, while anti-aging agent contains hindered phenol structure can synergistically give coating matrix anti-aging effect, improve the anti-aging performance of matrix.

Description

Technical Field

[0001] This invention relates to the field of coating technology, specifically to a method for preparing and applying a two-component, high-performance, peelable protective coating. Background Technology

[0002] In numerous diverse industries, including automobile manufacturing, home appliance production, electronic product assembly, and construction engineering, the demand for product surface protection continues to grow. Peelable coatings, as a highly effective protective measure, possess particularly broad market prospects due to their unique application advantages.

[0003] For example, in automobile manufacturing, peelable coatings can be used not only for temporary protection of the vehicle body surface but also for the protection of various components, ensuring they are not damaged during transportation, storage, and assembly. By using peelable coatings, companies can significantly improve product quality and appearance integrity, effectively reduce defect rates, thereby adding extra value to products and further enhancing their overall competitiveness in the fierce market competition. Due to the widespread application of peelable coatings, the market's performance requirements for them are also increasing. Existing technologies for improving the protective performance of peelable coatings only enhance single protective properties, while improvements in multiple protective properties remain limited. Summary of the Invention

[0004] The purpose of this invention is to improve the multi-protective properties of peelable coatings, and to provide a method for preparing and applying a two-component high-performance peelable protective coating.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] 1. A two-component high-performance peelable protective coating, comprising, by weight, the following raw materials: 80-100 parts of component A and 20-30 parts of component B; wherein component A comprises: 30-50 parts of hyperbranched resin, 15-20 parts of acrylic dispersion 1, 15-20 parts of acrylic dispersion 2, 3-5 parts of impact-resistant functional agent, 0.3-0.5 parts of leveling agent, 0.3-0.5 parts of defoamer, 0.1-0.15 parts of pH adjuster, 1-1.5 parts of color paste, 2-5 parts of peelable additive, 5-8 parts of anti-aging agent, 10-15 parts of solvent 1, 3-5 parts of solvent 2, and 0.002-0.003 parts of initiator; and component B is 10-15 parts of isocyanate curing agent.

[0007] Further, the pH adjustment is 2-amino-2-methyl-1-propanol, model AMP95 or pH-1355; the leveling agent is any one of BKY-348 and BYK-346; the defoamer is any one of TEGO830, TEGO822, and BYK-024; and the initiator is any one of ammonium persulfate, sodium persulfate, and potassium persulfate.

[0008] Furthermore, the isocyanate curing agent is a mixture of hexamethylene diisocyanate and diphenylmethane diisocyanate in a mass ratio of 1:1.

[0009] Furthermore, the method for preparing the impact-resistant functional agent includes the following steps:

[0010] Step A1: Add maleic anhydride to acetone, stir for 20-30 min in an ice-water bath, then add 1,3,5-tris(4-aminophenyl)benzene, react for 2-3 h, filter and dry the resulting solution to obtain intermediate 1. The reaction route is as follows:

[0011] ;

[0012] Step A2: Intermediate 1 and oleyl alcohol are added to a toluene solution. After the reaction is complete, the mixture is neutralized with a 10% sodium carbonate solution, washed with deionized water, distilled under reduced pressure, and dried to obtain the shock-resistant functional agent. The reaction route is as follows:

[0013] , Where R=C 18 H 35 .

[0014] Reaction principle: 1,3,5-tris(4-aminophenyl)benzene is reacted with maleic anhydride to further functionalize it, thereby obtaining intermediate 1. Then, intermediate 1 is linked with long olefin molecules to obtain an impact-resistant functional agent, which can effectively improve the precipitation phenomenon of small molecule materials and maintain a longer-lasting material effect.

[0015] Further, in step A1, the mass ratio of maleic anhydride to 1,3,5-tris(4-aminophenyl)benzene is 1:1-1.2.

[0016] Further, in step A2, the mass ratio of intermediate 1 to oleyl alcohol is 1:2-2.2; the catalyst is p-toluenesulfonic acid; in step A2, the mass ratio of intermediate 1 to catalyst is 1:0.07-0.08.

[0017] Furthermore, the method for preparing the anti-aging agent includes the following steps:

[0018] Step B1: Disperse nano zinc oxide in isopropanol by ultrasonication, slowly add 3-(2,3-epoxypropoxy)propyltrimethoxysilane under stirring, and heat to 60-80℃ for 3-5 hours. After filtration and drying, the modified nano zinc oxide is obtained.

[0019] Step B2: Modified nano zinc oxide and 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid are added to xylene, followed by the catalyst N,N-dimethylbenzylamine. Under anaerobic conditions, the mixture is stirred and reacted at 130-140℃ for 8-10 hours. After vacuum filtration, washing and drying, intermediate a is obtained.

[0020] Step B3: Add intermediate a to toluene, mix well, then add oleic acid and p-toluenesulfonic acid, heat to 70-75℃, react for 4-5 hours, let stand, wash, and vacuum dry to obtain the anti-aging agent.

[0021] Reaction principle: Modified zinc oxide nanoparticles are functionalized by epoxy silane coupling agent to obtain modified zinc oxide nanoparticles. Then, hindered phenolic structures are grafted onto the modified zinc oxide nanoparticles by reacting epoxy groups with carboxylic acids to obtain intermediate a. The hydroxyl groups in intermediate a undergo esterification with oleic acid to obtain a macromolecular anti-aging agent.

[0022] Further, in step B1, the mass ratio of the nano-zinc oxide and 3-(2,3-epoxypropoxy)propyltrimethoxysilane is 1:(0.002-0.005)g; in step B2, the mass ratio of the modified nano-zinc oxide, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, and catalyst is 1g:(0.8-1)g:(0.13-0.15)g; the catalyst is N,N-dimethylbenzylamine; in step B3, the mass ratio of intermediate a and oleic acid is 1:(0.5-0.6)g.

[0023] A method for preparing a two-component, high-performance, peelable protective coating includes the following steps:

[0024] Step 1: Add the hyperbranched resin, acrylic dispersion 1, and acrylic dispersion 2 to a stirrer and stir for 10-15 minutes at 400-600 rpm. Then add the defoamer, impact-resistant functional agent, pH adjuster, anti-aging agent, and color paste and stir for 20-25 minutes at 600-800 rpm. Next, add the peelable additive, solvent 1, solvent 2, and initiator and stir for 10-15 minutes at 500-700 rpm to obtain component A.

[0025] Step 2: Hexamethylene diisocyanate and diphenylmethane diisocyanate are stirred in a stirrer at a speed of 400-600 r / min for 5-10 min to obtain component B;

[0026] Step 3: Mix components A and B thoroughly to obtain a two-component high-performance peelable protective coating.

[0027] The beneficial effects of this invention are:

[0028] (1) By incorporating impact-resistant functional agents containing biphenyl and unsaturated long-chain olefin structures into the preparation of coatings, the mechanical properties of coatings can be greatly improved when applied to biphenyl structures, which have high rigidity. The grafted unsaturated long-chain olefin structures can crosslink with the matrix under the action of initiators, thereby improving the strength of the matrix structure. At the same time, the impact-resistant functional agents are not easily precipitated, achieving a long-lasting impact resistance effect. Furthermore, they can work synergistically with anti-aging agents to improve the water resistance and waterproof performance of the matrix.

[0029] (2) By using functionalized nano zinc oxide as an anti-aging agent to participate in the preparation of coating matrix, the anti-aging performance of the matrix is ​​improved. The anti-aging agent contains a large number of hindered phenolic structures that can scavenge free radicals through substituent hydroxyl groups and their aromatic structures. It synergistically imparts anti-aging effect to the coating matrix with the absorption of ultraviolet light by nano zinc oxide. The unsaturated long chains contained therein can chemically crosslink with the matrix through free radical polymerization. It can improve the mechanical properties of the matrix together with nano zinc oxide. It can also improve the phenomenon of easy precipitation of small molecule anti-aging agents and promote their uniform dispersion in the matrix.

[0030] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Detailed Implementation

[0031] The preferred embodiments of the present invention are described below. It should be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0032] The hyperbranched resin is Zhanxin waterborne resin MACRYNALVSM6299w / 42WA;

[0033] Acrylic dispersion 1 is Sartoma SR203 tetrahydrofuran methacrylate;

[0034] Acrylic dispersion 2 is Sartoma SR531 trimethylolpropane formal acrylate;

[0035] The colorant is titanium dioxide;

[0036] Solvent 1 is deionized water;

[0037] Solvent 2 is propylene glycol methyl ether PM;

[0038] The peelable additive is BYK-3710;

[0039] pH adjusted to 2-amino-2-methyl-1-propanol, model AMP95;

[0040] The leveling agent is BKY-348;

[0041] The defoamer is TEGO830;

[0042] The initiator is ammonium persulfate.

[0043] Example 1

[0044] A method for preparing a two-component, high-performance, peelable protective coating includes the following steps:

[0045] Step 1: Add 30 parts of hyperbranched resin, 15 parts of acrylic dispersion 1, and 15 parts of acrylic dispersion 2 to a stirrer and stir for 10 minutes at 400 rpm. Then add 0.3 parts of defoamer, 3 parts of impact-resistant functional agent, 0.1 parts of pH adjuster, 5 parts of anti-aging agent, and 1 part of color paste and stir for 20 minutes at 600 rpm. Then add 2 parts of peelable additive, 10 parts of solvent 1, 3 parts of solvent 2, and 0.002 parts of initiator and stir for 10 minutes at 500 rpm to obtain component A.

[0046] Step 2: Mix 5 parts hexamethylene diisocyanate and 5 parts diphenylmethane diisocyanate in a stirrer at 400 r / min for 5-10 min to obtain component B;

[0047] Step 3: Mix 80 parts of component A and 20 parts of component B evenly to obtain a two-component high-performance peelable protective coating.

[0048] The preparation method of the impact-resistant functional agent includes the following steps:

[0049] Step A1: Add 3g of maleic anhydride, then add 60mL of acetone, stir for 20-30min in an ice-water bath, then add 3.3g of 1,3,5-tris(4-aminophenyl)benzene, react for 2h, filter and dry the solution after reaction to obtain intermediate 1.

[0050] Step A2: Add 1.3g of intermediate 1 and 1.8g of oleyl alcohol to 20mL of toluene solution, then add 0.1g of catalyst, heat to 100℃, react for 2h. After the reaction is completed, neutralize with 10% sodium carbonate solution, wash with deionized water, distill under reduced pressure, and dry to obtain the shock-resistant functional agent.

[0051] The method for preparing the anti-aging agent includes the following steps:

[0052] Step B1: 10g of nano zinc oxide was ultrasonically dispersed in isopropanol, and 0.05g of 3-(2,3-epoxypropoxy)propyltrimethoxysilane was slowly added under stirring. The mixture was heated to 60℃ and reacted for 3h. After filtration and drying, modified nano zinc oxide was obtained.

[0053] Step B2: Add 10g of modified nano zinc oxide and 0.8g of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid to 200mL of xylene, then add 1.5g of catalyst N,N-dimethylbenzylamine. Under anaerobic conditions, stir and react at 130℃ for 8h. Filter under reduced pressure, wash, and dry to obtain intermediate a.

[0054] Step B3: Add 6g of intermediate a to 200mL of toluene, mix well, then add 3.6g of oleic acid and 0.24g of p-toluenesulfonic acid, heat to 70℃, react for 4h, let stand, wash, and vacuum dry to obtain the anti-aging agent.

[0055] Example 2

[0056] A method for preparing a two-component, high-performance, peelable protective coating includes the following steps:

[0057] Step 1: Add 38 parts of hyperbranched resin, 16 parts of acrylic dispersion 1, and 18 parts of acrylic dispersion 2 to a stirrer and stir for 13 minutes at 500 rpm. Then add 0.4 parts of defoamer, 4.8 parts of impact-resistant functional agent, 0.12 parts of pH adjuster, 7.6 parts of anti-aging agent, and 1.1 parts of color paste and stir for 24 minutes at 750 rpm. Then add 3 parts of peelable additive, 12 parts of solvent 1, 4 parts of solvent 2, and 0.002 parts of initiator and stir for 13 minutes at 640 rpm to obtain component A.

[0058] Step 2: Mix 6 parts hexamethylene diisocyanate and 6 parts diphenylmethane diisocyanate in a stirrer at 540 r / min for 8 min to obtain component B;

[0059] Step 3: Mix 90 parts of component A and 23 parts of component B evenly to obtain a two-component high-performance peelable protective coating.

[0060] The impact-resistant functional agent and the anti-aging agent are the same as those in Example 1.

[0061] Example 3

[0062] A method for preparing a two-component, high-performance, peelable protective coating includes the following steps:

[0063] Step 1: Add 50 parts of hyperbranched resin, 20 parts of acrylic dispersion 1, and 20 parts of acrylic dispersion 2 to a stirrer and stir for 15 minutes at 600 rpm. Then add 0.5 parts of defoamer, 5 parts of impact-resistant functional agent, 0.15 parts of pH adjuster, 8 parts of anti-aging agent, and color paste and stir for 25 minutes at 800 rpm. Then add 5 parts of peelable additive, 15 parts of solvent 1, 5 parts of solvent 2, and 0.003 parts of initiator and stir for 15 minutes at 700 rpm to obtain component A.

[0064] Step 2: Mix 7.5 parts hexamethylene diisocyanate and 7.5 parts diphenylmethane diisocyanate in a stirrer at 600 r / min for 10 min to obtain component B;

[0065] Step 3: Mix 100 parts of component A and 30 parts of component B evenly to obtain a two-component high-performance peelable protective coating.

[0066] The impact-resistant functional agent and the anti-aging agent are the same as those in Example 1.

[0067] Comparative Example 1

[0068] A method for preparing a two-component, high-performance, peelable protective coating includes the following steps:

[0069] Step 1: Add 38 parts of hyperbranched resin, 16 parts of acrylic dispersion 1, and 18 parts of acrylic dispersion 2 to a stirrer and stir for 13 minutes at 500 rpm. Then add 0.4 parts of defoamer, 0.12 parts of pH adjuster, 7.6 parts of anti-aging agent, and 1.1 parts of color paste and stir for 24 minutes at 750 rpm. Next, add 3 parts of peelable agent, 12 parts of solvent 1, 4 parts of solvent 2, and 0.002 parts of initiator and stir for 13 minutes at 640 rpm to obtain component A.

[0070] Step 2: Mix 6 parts hexamethylene diisocyanate and 6 parts diphenylmethane diisocyanate in a stirrer at 540 r / min for 8 min to obtain component B;

[0071] Step 3: Mix 90 parts of component A and 23 parts of component B evenly to obtain a two-component high-performance peelable protective coating.

[0072] The anti-aging agent is the same as that in Example 1.

[0073] Comparative Example 2

[0074] A method for preparing a two-component, high-performance, peelable protective coating includes the following steps:

[0075] Step 1: Add 38 parts of hyperbranched resin, 16 parts of acrylic dispersion 1, and 18 parts of acrylic dispersion 2 to a stirrer and stir for 13 minutes at 500 rpm. Then add 0.4 parts of defoamer, 4.8 parts of impact-resistant functional agent, 0.12 parts of pH adjuster, and 1.1 parts of color paste and stir for 24 minutes at 750 rpm. Then add 3 parts of peelable additive, 12 parts of solvent 1, 4 parts of solvent 2, and 0.002 parts of initiator and stir for 13 minutes at 640 rpm to obtain component A.

[0076] Step 2: Mix 6 parts hexamethylene diisocyanate and 6 parts diphenylmethane diisocyanate in a stirrer at 540 r / min for 8 min to obtain component B;

[0077] Step 3: Mix 90 parts of component A and 23 parts of component B evenly to obtain a two-component high-performance peelable protective coating.

[0078] The impact-resistant functional agent is the same as that in Example 1.

[0079] Comparative Example 3

[0080] A method for preparing a two-component, high-performance, peelable protective coating includes the following steps:

[0081] Step 1: Add 38 parts of hyperbranched resin, 16 parts of acrylic dispersion 1, and 18 parts of acrylic dispersion 2 to a stirrer and stir for 13 minutes at 500 rpm. Then add 0.4 parts of defoamer, 0.12 parts of pH adjuster, and 1.1 parts of color paste and stir for 24 minutes at 750 rpm. Next, add 3 parts of peelable agent, 12 parts of solvent 1, 4 parts of solvent 2, and 0.002 parts of initiator and stir for 13 minutes at 640 rpm to obtain component A.

[0082] Step 2: Mix 6 parts hexamethylene diisocyanate and 6 parts diphenylmethane diisocyanate in a stirrer at 540 r / min for 8 min to obtain component B;

[0083] Step 3: Mix 90 parts of component A and 23 parts of component B evenly to obtain a two-component high-performance peelable protective coating.

[0084] Performance testing:

[0085] Water resistance test: Refer to the GB / T5209 standard. Immerse the sample plate in a constant temperature water bath at 40°C. Take out the sample every 2 hours, dry the surface of the sample plate, and observe for appearance defects such as blistering, discoloration, and blooming; Aging resistance test: Refer to the GB / T14522 standard. Conduct an accelerated aging test in an ultraviolet aging test chamber. Regularly take out the sample plate and compare the color difference change and other appearance defects; Temperature change resistance: Test according to JG / T25—1999 "Determination Method for Frost Resistance of Architectural Coating Coatings". Minor powder loss is allowed. If 2 out of 3 test plates have no blistering, cracking, or peeling, it is judged as qualified; Peel strength test: Refer to the GB / T2790-1995 standard. Measure the width of the tinplate and the average thickness of the coating film. Bend the unbonded part of the coating film 180°, clamp it on the base fixture of a universal material testing machine, and clamp the exposed part of the tinplate on the fixture of the machine crossbeam. The overall sample is in a vertical state. The separation speed of the two chucks is 50 mm / min. Make 5 samples for each type and obtain the average value; The detection method for the maximum elongation at break refers to GB / T528 Impact resistance test: Impact resistance: Test according to "GB / T1732-93 Determination Method for Impact Resistance of Paint Films", and record the impact resistance at normal temperature and when heated (40°C).

[0086] Table 1

[0087] Test Project Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Water resistance test No changes in appearance No changes in appearance No changes in appearance It foams No changes in appearance Shedding, powdering High and low temperature resistance test No bubbling, no cracking, no peeling, no powdering No bubbling, no cracking, no peeling, no powdering No bubbling, no cracking, no peeling, no powdering No bubbling, no cracking, no peeling, no powdering There are bubbles and cracks. There are issues such as bubbling, cracking, peeling, and powdering. Aging resistance test No changes in appearance No changes in appearance No changes in appearance No changes in appearance Yellowing, shedding Yellowing, peeling, powdering Impact resistance test / cm 53 55 52 36 46 24 Peel strength test / MPa 28 32 30 25 16 14

[0088] From the test results in the above table, it can be concluded that in Examples 1-3, excellent water resistance, high and low temperature resistance, aging resistance, impact resistance, and relatively high peel strength are demonstrated in all 6 groups of tests. Among them, the impact resistance agent and the aging resistance agent generate crosslinks in the matrix through free radical polymerization during the test, improving the densification of the coating, and significantly enhancing the water resistance and impact resistance. At the same time, a large number of hindered phenol structures perform excellently in the aging resistance test, and the relatively large number of biphenyl structures and long carbon chains endow the material with excellent temperature resistance; In Comparative Example 1, since the coating does not have an impact resistance functional agent, it does not have a biphenyl structure and has fewer long carbon chains. Therefore, in the impact resistance test, the result is poor. The biphenyl structure can improve the water resistance of the material, so blistering occurs in the water resistance test and the performance is poor. In the high and low temperature resistance test, because the aging resistance agent also contains long carbon chains and inorganic nanomaterials, the coating in Comparative Example 1 has a good temperature resistance effect in the high and low temperature resistance test and also has a good peel strength; In Comparative Example 2, since it only does not contain an aging resistance functional agent during the test, it performs well in the high and low temperature resistance test, shows yellowing and other phenomena in the aging resistance test, with poor performance, poor peel strength, good performance in the impact resistance test, and good performance in the water resistance test; In Comparative Example 3, since it does not contain an impact resistance functional agent and an aging resistance agent, it is the worst in all tests.

[0089] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A two-component, high-performance, peelable protective coating, characterized in that, By weight, it includes the following raw materials: 80-100 parts of component A and 20-30 parts of component B; Component A comprises: 30-50 parts hyperbranched resin, 15-20 parts acrylic dispersion 1, 15-20 parts acrylic dispersion 2, 3-5 parts impact-resistant functional agent, 0.3-0.5 parts leveling agent, 0.3-0.5 parts defoamer, 0.1-0.15 parts pH adjuster, 1-1.5 parts color paste, 2-5 parts peelable additive, 5-8 parts anti-aging agent, 10-15 parts solvent 1, 3-5 parts solvent 2, and 0.002-0.003 parts initiator; Component B is 10-15 parts of isocyanate curing agent; The hyperbranched resin is Zhanxin waterborne resin MACRYNALVSM6299w / 42W; The method for preparing the impact-resistant functional agent includes the following steps: Step A1: Add maleic anhydride to acetone, stir for 20-30 min in an ice-water bath, then add 1,3,5-tris(4-aminophenyl)benzene, react for 2-3 h, filter and dry the solution after reaction to obtain intermediate 1. Step A2: Add intermediate 1 and oleyl alcohol to toluene solution, then add catalyst, heat to 100-110℃, react for 1.5-3h. After the reaction is completed, neutralize with 10% sodium carbonate solution, wash with deionized water, distill under reduced pressure, and dry to obtain impact-resistant functional agent. The method for preparing the anti-aging agent includes the following steps: Step B1: Disperse nano zinc oxide in isopropanol by ultrasonication, slowly add 3-(2,3-epoxypropoxy)propyltrimethoxysilane under stirring, and heat to 60-80℃ for 3-5 hours. After filtration and drying, the modified nano zinc oxide is obtained. Step B2: Modified nano zinc oxide and 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid are added to xylene, followed by the catalyst N,N-dimethylbenzylamine. Under anaerobic conditions, the mixture is stirred and reacted at 130-140℃ for 8-10 hours. After vacuum filtration, washing and drying, intermediate a is obtained. Step B3: Add intermediate a to toluene, mix well, then add oleic acid and p-toluenesulfonic acid, heat to 70-75℃, react for 4-5 hours, let stand, wash, and vacuum dry to obtain the anti-aging agent.

2. The two-component high-performance peelable protective coating according to claim 1, characterized in that, The pH adjustment is 2-amino-2-methyl-1-propanol, model AMP95 or pH-1355; the leveling agent is any one of BKY-348 and BYK-346; the defoamer is any one of TEGO830, TEGO822, and BYK-024; and the initiator is any one of ammonium persulfate, sodium persulfate, and potassium persulfate.

3. The two-component high-performance peelable protective coating according to claim 1, characterized in that, The isocyanate curing agent is a mixture of hexamethylene diisocyanate and diphenylmethane diisocyanate in a mass ratio of 1:

1.

4. The two-component high-performance peelable protective coating according to claim 1, characterized in that, In step A1, the mass ratio of maleic anhydride to 1,3,5-tris(4-aminophenyl)benzene is 1:1-1.

2.

5. The two-component high-performance peelable protective coating according to claim 1, characterized in that, In step A2, the mass ratio of intermediate 1 to oleyl alcohol is 1:1.2-2.2; the catalyst is p-toluenesulfonic acid; in step A2, the mass ratio of intermediate 1 to catalyst is 1:0.07-0.

08.

6. A two-component high-performance peelable protective coating according to claim 1, characterized in that, In step B1, the mass ratio of the nano-zinc oxide and 3-(2,3-epoxypropoxy)propyltrimethoxysilane is 1:(0.002-0.005)g; in step B2, the mass ratio of the modified nano-zinc oxide, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, and catalyst is 1g:(0.8-1)g:(0.13-0.15)g; the catalyst is N,N-dimethylbenzylamine; in step B3, the mass ratio of intermediate a and oleic acid is 1:(0.5-0.6)g.

7. A method for preparing a two-component high-performance peelable protective coating according to any one of claims 1-6 comprises the following steps: Step 1: Add the hyperbranched resin, acrylic dispersion 1, and acrylic dispersion 2 to a stirrer and stir for 10-15 minutes at 400-600 rpm. Then add the defoamer, impact-resistant functional agent, pH adjuster, anti-aging agent, and color paste and stir for 20-25 minutes at 600-800 rpm. Next, add the peelable additive, solvent 1, solvent 2, and initiator and stir for 10-15 minutes at 500-700 rpm to obtain component A. Step 2: Hexamethylene diisocyanate and diphenylmethane diisocyanate are stirred in a stirrer at a speed of 400-600 r / min for 5-10 min to obtain component B; Step 3: Mix components A and B thoroughly to obtain a two-component high-performance peelable protective coating.