Metallic paint for special-shaped steel plate and preparation method thereof

Abstract

This application relates to the field of coating technology, and discloses a metallic paint for irregularly shaped steel plates and its preparation method. The metallic paint for irregularly shaped steel plates comprises the following raw materials in parts by weight: 30-60 parts silicone masterbatch, 40-60 parts polyisoprene rubber, 30-80 parts organosilicon-terminated vinyl silicone oil, 5-15 parts nickel powder, 10-30 parts petrolatum, and 3-12 parts nano-calcium carbonate; wherein the nickel powder is prepared by mixing flake nickel powder and spherical nickel powder in a weight ratio of 0.3-0.8:1. The metallic paint for irregularly shaped steel plates prepared in this application exhibits excellent comprehensive performance, possessing excellent flexibility to adapt to the irregular surface of irregularly shaped steel plates, while also exhibiting high hardness and strength, resistance to wear, and safety and environmental friendliness.

Description

Technical Field

[0001] This application relates to the field of coating technology, and in particular to a metallic paint for irregularly shaped steel plates and its preparation method. Background Technology

[0002] Irregularly shaped steel plates are a type of complex and irregularly shaped steel profiles.

[0003] Because shaped steel plates can be processed into various shapes and textures, they are now widely used in the construction of landscape walls, providing more possibilities for landscape wall design. Meanwhile, metallic paint coatings can enhance the aesthetics and artistry of landscape walls. Through proper design and processing, shaped steel plates can present unique visual effects, such as the luster and texture of metal, adding a sense of fashion and modernity to the landscape. Furthermore, shaped steel plates have good weather resistance and corrosion resistance, maintaining the aesthetic appeal and lifespan of the landscape wall for a long time. They also possess good stability, resisting damage from natural environments and human factors. Moreover, shaped steel plates can be customized and shaped according to design requirements, adapting to various shapes and sizes, and better integrating with the surrounding environment and buildings. Through personalized design and manufacturing, shaped steel plates can bring unique personality and characteristics to landscape walls, allowing them to better blend into the surrounding environment and enhance overall aesthetics and harmony.

[0004] However, landscape walls made of irregularly shaped steel have a large volume and weight, requiring more maintenance and upkeep, resulting in higher maintenance costs. In addition, the metal paint currently used has poor flexibility, making the coating on the seams of landscape walls made of irregularly shaped steel prone to cracking, which increases repair and maintenance costs and affects the aesthetics and durability of the landscape wall.

[0005] Therefore, there is an urgent need to develop a metallic paint with excellent flexibility that can better adapt to the irregular surface of irregularly shaped steel plates and reduce the risk of coating cracking. Summary of the Invention

[0006] In order to solve at least one of the above-mentioned technical problems and to develop a metallic paint with excellent flexibility and better adaptability to the irregular surface of irregular steel plates, thereby reducing the risk of coating cracking, this application provides a metallic paint for irregular steel plates and a method for preparing the same.

[0007] On the one hand, the present application provides a metallic paint for irregularly shaped steel plates, comprising the following raw materials in parts by weight: 30-60 parts of silicone masterbatch, 40-60 parts of polyisoprene rubber, 30-80 parts of organosilicon-terminated vinyl silicone oil, 5-15 parts of nickel powder, 10-30 parts of petrolatum, and 3-12 parts of nano-calcium carbonate.

[0008] The nickel powder is prepared by combining flake nickel powder and spherical nickel powder in a weight ratio of 0.3-0.8:1.

[0009] By adopting the above technical solution, the metal paint for irregular steel plates prepared in this application has excellent comprehensive performance, excellent flexibility, can adapt to the irregular surface of irregular steel plates, and has high hardness and strength, is not easy to wear, and is safe and environmentally friendly.

[0010] The silicone masterbatch, polyisoprene rubber, and organosilicon-terminated vinyl silicone oil system added in this application produce a metallic paint with superior flexibility, weather resistance, corrosion resistance, protective performance, and adhesion. This allows it to better adapt to the operating environment of irregularly shaped steel plates and extend the service life of the metal. Specifically, the silicone masterbatch and organosilicon-terminated vinyl silicone oil significantly improve the coating's flexibility, weather resistance, and corrosion resistance, forming a dense protective film on the metal surface. This effectively blocks the erosion of moisture, oxygen, and chemicals, thus extending the metal's service life. Furthermore, their special structure increases the coating's hardness, making it more wear-resistant. Polyisoprene rubber, another important component, enhances the metallic paint's flexibility and resilience, allowing it to better adapt to the irregular surfaces of irregularly shaped steel plates and improving the coating's wear resistance and strength, resulting in superior protective performance.

[0011] The nickel powder added in this application is prepared by combining flake nickel powder and spherical nickel powder, which gives the prepared metallic paint good flexibility and protective properties, making it better suited to the use environment of irregularly shaped steel plates and improving the service life of metals.

[0012] Optionally, the nickel powder is prepared from the flake nickel powder and the spherical nickel powder in a weight ratio of 0.5-0.7:1.

[0013] By adopting the above technical solution, this application selects a better ratio of flake nickel powder and spherical nickel powder to prepare nickel powder, resulting in a more superior overall performance of the prepared metallic paint.

[0014] Optionally, the average particle size of the flake nickel powder is 5-20 μm.

[0015] Optionally, the average particle size of the spherical nickel powder is 60-300 nm.

[0016] By adopting the above technical solution, this application uses flake nickel powder and spherical nickel powder with specific average particle size, so that the prepared nickel powder is more evenly dispersed in the metal paint. The flake nickel powder can increase the toughness of the coating and effectively avoid the coating cracking or peeling caused by the deformation of the base layer. At the same time, the spherical nickel powder improves the hardness and wear resistance of the coating, as well as has good chemical stability, which can enhance the corrosion resistance of the coating and effectively protect the metal surface from oxidation and corrosion.

[0017] Optionally, the molecular weight of the polyisoprene rubber is 10,000-500,000 Da.

[0018] By adopting the above technical solution, this application uses polyisoprene rubber with a specific molecular weight range, which improves the dispersion performance of polyisoprene rubber, thereby improving the flexibility and resilience of the coating. At the same time, polyisoprene rubber can also improve the wear resistance and strength of the coating, giving the metallic paint better protective performance.

[0019] Optionally, the silicone masterbatch is a starch-modified silicone masterbatch, which is prepared from starch and silicone masterbatch as raw materials, and the amount of starch used is 18-30 wt% of the amount of silicone masterbatch.

[0020] Optionally, the amount of starch used is 20-26 wt% of the amount of silicone masterbatch used.

[0021] By adopting the above technical solutions, the metallic paint prepared in this application has superior environmental protection and comprehensive performance, can better adapt to various usage environments, and improve the service life of metals. This application uses starch-modified silicone masterbatch, which enables the prepared metallic paint to ensure coating performance while also having green and environmentally friendly characteristics, and can significantly reduce the water absorption rate and surface energy of the coating, thereby improving the weather resistance of the coating.

[0022] Optionally, the average particle size of the starch is 30-100 μm.

[0023] Optionally, the specific surface area of ​​the starch is 10-30 m². 2 / g.

[0024] By adopting the above technical solution, this application selects starch with a specific average particle size and specific surface area, so that the prepared starch-modified silicone masterbatch can be better dispersed in metallic paint, improving the weather resistance of the coating. At the same time, it can increase the stability of the masterbatch and enable the masterbatch to be better adsorbed and combined in metallic paint, thereby improving the flexibility and protective performance of the coating.

[0025] On the other hand, this application provides a method for preparing a metallic paint for irregularly shaped steel plates, comprising the following steps:

[0026] S1. Take flake nickel powder and spherical nickel powder, stir and mix them to prepare mixed nickel powder;

[0027] S2. Mix the mixed nickel powder with nano-calcium carbonate to prepare premix A;

[0028] S3. Take silicone masterbatch, polyisoprene rubber and organosilicon-terminated vinyl silicone oil and stir to mix them to prepare premix B;

[0029] S4. After heating the petrolatum, add premix A and premix B and stir to prepare a metallic paint for shaped steel.

[0030] By adopting the above technical solution, the preparation method of this application is simple to operate, has high preparation efficiency, can effectively guarantee the performance of the metal paint, and the prepared metal paint has excellent flexibility and good adaptability, meeting the requirements for use of irregular steel plates.

[0031] In summary, the present invention has at least one of the following beneficial technical effects:

[0032] 1. The metallic paint for irregular steel plates prepared in this application has excellent comprehensive performance, excellent flexibility, and can adapt to the irregular surface of irregular steel plates. At the same time, it has high hardness and strength, is not easy to wear, and is safe and environmentally friendly.

[0033] 2. The silicone masterbatch, polyisoprene rubber and organosilicon-terminated vinyl silicone oil system added in this application produce metal paints with superior flexibility, weather resistance, corrosion resistance, protective performance and adhesion, which can better adapt to the use environment of irregular steel plates and improve the service life of metals.

[0034] 3. The nickel powder added in this application is prepared by combining flake nickel powder and spherical nickel powder, which gives the prepared metallic paint good flexibility and protective properties;

[0035] 4. The preparation method of this application is simple to operate, has high preparation efficiency, can effectively guarantee the performance of the metal paint, and the prepared metal paint has excellent flexibility and good adaptability, meeting the requirements for use of irregular steel plates. Detailed Implementation

[0036] The present application will be further described in detail below with reference to the embodiments.

[0037] This application designs a metallic paint for irregularly shaped steel plates, comprising the following raw materials in parts by weight: 30-60 parts of silicone masterbatch, 40-60 parts of polyisoprene rubber, 30-80 parts of organosilicon-terminated vinyl silicone oil, 5-15 parts of nickel powder, 10-30 parts of petrolatum, and 3-12 parts of nano-calcium carbonate.

[0038] The nickel powder is prepared by combining flake nickel powder and spherical nickel powder in a weight ratio of 0.3-0.8:1.

[0039] This application discloses a method for preparing a metallic paint for irregularly shaped steel plates, comprising the following steps:

[0040] S1. Take flake nickel powder and spherical nickel powder, stir and mix them to prepare mixed nickel powder;

[0041] S2. Mix the mixed nickel powder with nano-calcium carbonate to prepare premix A;

[0042] S3. Take silicone masterbatch, polyisoprene rubber and organosilicon-terminated vinyl silicone oil and stir to mix them to prepare premix B;

[0043] S4. After heating the petrolatum, add premix A and premix B and stir to prepare a metallic paint for shaped steel.

[0044] The raw materials used in this application are as follows. Unless otherwise specified, all raw materials used in this application are commercially available:

[0045] Silicone masterbatch: Guangzhou Chuangjinxin Chemical Technology Co., Ltd., model K6380M;

[0046] Polyisoprene rubber: 99% purity;

[0047] Organosilicon-terminated vinyl silicone oil: CAS No. 63148-62-9;

[0048] Mineral oil: CAS No. 8009-03-8;

[0049] Nano-calcium carbonate: purity ≥ 99%;

[0050] Flake nickel powder: Zhejiang Manli Nanotechnology Co., Ltd., purity 99.9%;

[0051] Spherical nickel powder: Zhejiang Yamei Nanotechnology Co., Ltd., purity > 99.9%;

[0052] Starch: Selected from corn starch, 99% purity.

[0053] Testing items and methods:

[0054] Paint film flexibility: Referencing GB / T1731-79 "Test Method for Paint Film Flexibility", a shaft tester is used. During the test, the painted tinplate is bent on shafts of different diameters. The smallest shaft diameter (mm) that does not cause damage to the paint film after bending is expressed as 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, 32.

[0055] Paint film hardness: Refer to GB / T 6739-86 "Test of Hardness of Coating Film by Pencil" for judgment standard: After the paint film is dry, apply a vertical pressure of 1 kg and draw a 3 cm length on the paint film at a 45-degree angle. Repeat 5 times. If the paint film has no scratches, the hardness of the pencil is the paint film hardness.

[0056] Paint film adhesion: The grading method is based on the results of GB / T9286-88 "Cross-cut test of paint and varnish films". To differentiate between good and bad adhesion, a tape test must be used to obtain satisfactory results. The best adhesion is achieved when the paint film is intact in the first area, grade 1; the second area is intact, grade 2; and so on, with grade 7 being the worst.

[0057] Aging resistance: Tested in accordance with GB / T 1766-2008 "Rating Method for Aging of Paint and Varnish Coatings";

[0058] Salt spray resistance: Tested in accordance with GB / T 1771-2007 "Determination of resistance to neutral salt spray of paints and varnishes". Specific Implementation

[0060] Examples 1-3

[0061] The specific content of raw materials for a metallic paint for irregularly shaped steel plates is shown in Table 1.

[0062] Table 1

[0063]

[0064]

[0065] The molecular weight of the polyisoprene rubber is 10,000-12,000, and the nickel powder is made of flake nickel powder and spherical nickel powder. The average particle size of the flake nickel powder is 5 μm, and the average particle size of the spherical nickel powder is 60 nm.

[0066] Example 1

[0067] A method for preparing a metallic paint for irregularly shaped steel plates includes the following steps:

[0068] S1. Take flake nickel powder and spherical nickel powder with a weight ratio of 0.3:1 and stir to prepare mixed nickel powder;

[0069] S2. Mix the mixed nickel powder with calcium carbonate with an average particle size of 50 nm to prepare premix A;

[0070] S3. Take silicone masterbatch, polyisoprene rubber and organosilicon-terminated vinyl silicone oil and stir to mix them to prepare premix B;

[0071] S4. Heat the petrolatum to 95°C, then add premix A and premix B and stir to prepare a metallic paint for shaped steel.

[0072] Example 2

[0073] A method for preparing a metallic paint for irregularly shaped steel plates includes the following steps:

[0074] S1. Take flake nickel powder and spherical nickel powder with a weight ratio of 0.5:1 and stir to prepare mixed nickel powder;

[0075] S2. Mix the mixed nickel powder with calcium carbonate with an average particle size of 200 nm to prepare premix A;

[0076] S3. Take silicone masterbatch, polyisoprene rubber and organosilicon-terminated vinyl silicone oil and stir to mix them to prepare premix B;

[0077] S4. Heat the petrolatum to 95°C, then add premix A and premix B and stir to prepare a metallic paint for shaped steel.

[0078] Example 3

[0079] A method for preparing a metallic paint for irregularly shaped steel plates includes the following steps:

[0080] S1. Take flake nickel powder and spherical nickel powder with a weight ratio of 0.8:1 and stir to prepare mixed nickel powder;

[0081] S2. Mix the mixed nickel powder with calcium carbonate with an average particle size of 600 nm to prepare premix A;

[0082] S3. Take silicone masterbatch, polyisoprene rubber and organosilicon-terminated vinyl silicone oil and stir to mix them to prepare premix B;

[0083] S4. Heat the petrolatum to 95°C, then add premix A and premix B and stir to prepare a metallic paint for shaped steel.

[0084] Comparative Example 1

[0085] Based on Example 2, except that the nickel powder is in flake form and the total weight of the nickel powder remains unchanged, the other components and preparation methods are the same as in Example 2.

[0086] Comparative Example 2

[0087] Based on Example 2, except that all nickel powders are spherical and the total weight of nickel powder remains unchanged, the other components and preparation methods are the same as in Example 2.

[0088] Comparative Example 3

[0089] Based on Example 2, except that an equal amount of organosilicon-terminated vinyl silicone oil is used to replace the silicone masterbatch, the other components and preparation methods are the same as in Example 2.

[0090] Comparative Example 4

[0091] Based on Example 2, except that an equal amount of silicone masterbatch is used to replace the organosilicon-terminated vinyl silicone oil, the other components and preparation methods are the same as in Example 2.

[0092] Comparative Example 5

[0093] Based on Example 2, except for the different preparation method, the composition is the same as in Example 2. The preparation method of the metallic paint for irregularly shaped steel plates includes the following steps:

[0094] S1. Take flake nickel powder and spherical nickel powder in a weight ratio of 0.5:1, calcium carbonate with an average particle size of 200nm, silicone masterbatch, polyisoprene rubber and organosilicon-terminated vinyl silicone oil and stir to prepare a premix.

[0095] S2. Take petrolatum, heat it to 95°C, add the premix and stir to prepare a metallic paint for shaped steel.

[0096] The metallic paints prepared in Examples 1-3 and Comparative Examples 1-5 were subjected to performance testing, and the test results are shown in Table 2.

[0097] Table 2

[0098]

[0099] As can be seen from Examples 1-3 and Table 2, the metallic paint for shaped steel prepared in this application has excellent comprehensive performance, good flexibility, high hardness, and excellent aging resistance and salt spray resistance.

[0100] As can be seen from Comparative Examples 1-2, Example 2, and Table 2, the metallic paint prepared by adding only flake nickel powder or only spherical nickel powder has poor overall performance and cannot meet production requirements. However, the metallic paint prepared by using nickel powder prepared with a specific ratio of flake and spherical nickel powder has superior overall performance. The inventors speculate that the mixed use of flake and spherical nickel powder can combine their advantages and improve the flexibility of the metallic paint. Flake nickel powder has good ductility and softness, which can increase the toughness of the coating and effectively avoid cracking or peeling of the coating due to substrate deformation, while spherical nickel powder can improve the hardness of the coating. The improved wear resistance makes the coating more wear-resistant, pressure-resistant, and corrosion-resistant. Therefore, the mixed use of flake nickel powder and spherical nickel powder can make the metallic paint exhibit better flexibility and protective performance when adapting to the irregular surface of irregular steel plates. As can be seen from Comparative Examples 3-4, Example 2 and Table 2, the silicone masterbatch and organosilicon-terminated vinyl silicone oil system used in this application can significantly improve the flexibility, weather resistance and corrosion resistance of the coating, and form a dense protective film on the metal surface, effectively blocking the erosion of moisture, oxygen and chemicals, thereby extending the service life of the metal. At the same time, due to their special structure, they can also improve the hardness of the coating, making it more wear-resistant.

[0101] As can be seen from Comparative Example 5, Example 2 and Table 2, the metal paint prepared by the specific method for preparing shaped steel metal paint of this application has better overall performance. Preparing nickel powder, premix A and premix B can better improve the uniformity and stability of the metal paint, thereby improving the overall performance of the metal paint.

[0102] Examples 4-5

[0103] Based on Example 2, except for the different weight ratio of flake nickel powder and spherical nickel powder, and the total amount of nickel powder being 10 kg, the other components and preparation methods are the same as in Example 2.

[0104] Example 4

[0105] The weight ratio of flake nickel powder to spherical nickel powder is 0.6:1.

[0106] Example 5

[0107] The weight ratio of flake nickel powder to spherical nickel powder is 0.7:1.

[0108] Examples 6-7

[0109] Based on Example 4, except for the difference in average particle size between flake nickel powder and spherical nickel powder, the other components and preparation methods are the same as in Example 4.

[0110] Example 6

[0111] The average particle size of the flake nickel powder is 12 μm, and the average particle size of the spherical nickel powder is 150 nm.

[0112] Example 7

[0113] The average particle size of the flake nickel powder is 20 μm, and the average particle size of the spherical nickel powder is 300 nm.

[0114] Examples 8-9

[0115] Based on Example 6, except for the different molecular weight of the polyisoprene rubber, the other components and preparation methods are the same as in Example 6.

[0116] Example 8

[0117] The molecular weight of polyisoprene rubber is 200,000-205,000.

[0118] Example 9

[0119] The molecular weight of polyisoprene rubber is 500,000-495,000.

[0120] The metallic paints prepared in Examples 4-9 were subjected to performance testing, and the test results are shown in Table 3.

[0121] Table 3

[0122]

[0123] As can be seen from Examples 4-7, 2 and Table 3, the metallic paint prepared by this application using flake nickel powder and spherical nickel powder with better ratio and better particle size has better overall performance.

[0124] As can be seen from Examples 8-9, 6 and Table 3, this application uses polyisoprene rubber with a better molecular weight range, which improves the dispersion performance of polyisoprene rubber, thereby improving the flexibility and resilience of the coating. At the same time, polyisoprene rubber can also improve the wear resistance and strength of the coating, giving the metallic paint better protective performance.

[0125] Examples 10-14

[0126] Based on Example 8, except that an equal amount of starch-modified silicone masterbatch was used to replace the silicone masterbatch, all other components and preparation methods were the same as in Example 8. The average particle size of the starch was 30 μm, and the specific surface area of ​​the starch was 10 m². 2 / g; The preparation method of starch-modified silicone masterbatch is as follows: starch and silicone masterbatch are mixed together in proportion, stirred at 120℃ for 30min, then stirred and heated to 180℃, and stirred at 180℃ for 40min, and then cooled to room temperature to prepare starch-modified silicone masterbatch.

[0127] Example 10

[0128] The amount of starch used is 18 wt% of the amount of silicone masterbatch used.

[0129] Example 11

[0130] The amount of starch used is 20 wt% of the amount of silicone masterbatch used.

[0131] Example 12

[0132] The amount of starch used is 23 wt% of the amount of silicone masterbatch used.

[0133] Example 13

[0134] The amount of starch used is 26 wt% of the amount of silicone masterbatch used.

[0135] Example 14

[0136] The amount of starch used is 30 wt% of the amount of silicone masterbatch used.

[0137] Examples 15-16

[0138] Based on Example 12, except for the average particle size and specific surface area of ​​starch, the other components and preparation methods are the same as in Example 12.

[0139] Example 15

[0140] The average particle size of starch is 60 μm, and the specific surface area of ​​starch is 20 m². 2 / g.

[0141] Example 16

[0142] The average particle size of starch is 100 μm, and the specific surface area of ​​starch is 30 m². 2 / g.

[0143] The metallic paints prepared in Examples 10-16 were subjected to performance testing, and the test results are shown in Table 4.

[0144] Table 4

[0145]

[0146] As can be seen from Examples 10-14, 8 and Table 4, this application uses starch-modified silicone masterbatch, which makes the prepared metallic paint not only ensure the coating performance but also have the characteristics of being green and environmentally friendly. It can also significantly reduce the water absorption rate and surface energy of the coating, thereby improving the weather resistance and salt spray resistance of the coating.

[0147] As can be seen from Examples 15-16, 12 and Table 4, this application selects starch with specific average particle size and specific surface area, so that the prepared starch-modified silicone masterbatch can be better dispersed in metallic paint, thereby improving the weather resistance of the coating.

[0148] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the principles of this application should be covered within the scope of protection of this application.

Claims

1. A metallic paint for a profiled steel sheet, characterized by, The metal paint for special-shaped steel comprises the following raw materials by weight: silicone master batch 30-60 parts, polyisoprene rubber 40-60 parts, organosilicon end-vinyl silicone oil 30-80 parts, nickel powder 5-15 parts, mineral oil 10-30 parts, and nano calcium carbonate 3-12 parts; The nickel powder is prepared from flaky nickel powder and spherical nickel powder in a weight ratio of 0.5-0.7:1, wherein the average particle size of the flaky nickel powder is 5-20 μm, and the average particle size of the spherical nickel powder is 60-300 nm; The molecular weight of the polyisoprene rubber is 10000-500000 Da; The silicone master granule is a starch modified silicone master granule, raw materials of the silicone master granule include starch and silicone master granule, the starch is used in an amount of 20-26wt% of the amount of the silicone master granule, the average particle size of the starch is 30-100μm, and the specific surface area of the starch is 10-30m 2 / g.

2. A method of producing a metallic paint for a profiled steel sheet according to claim 1, characterized in that, The method comprises the following steps: S1, stirring and mixing flaky nickel powder and spherical nickel powder to prepare mixed nickel powder; S2, stirring and mixing the mixed nickel powder and nano calcium carbonate to prepare premix A; S3, stirring and mixing silicone master batch, polyisoprene rubber and organosilicon end-vinyl silicone oil to prepare premix B; S4, after heating mineral oil, stirring and mixing premix A and premix B to prepare the metal paint for special-shaped steel according to claim 1.

Images