Protective coating for military equipment

Abstract

The invention discloses a protective coating for military equipment, and belongs to the technical field of coatings. The protective coating comprises a component A and a component B, the mass ratio of the component A to the component B is 1: (0.3-0.5), and the component A is prepared from the following raw materials in parts by weight: 28-45 parts of epoxy resin, 15-30 parts of polyurethane, 3-8 parts of an ultra-high-performance flexibilizer SC-8828, 2-6 parts of sodium acetate, 1-5 parts of an ultraviolet absorbent, 1-3 parts of a dispersing agent, 0.5-2.7 parts of a defoaming agent and 20-40 parts of a solvent; the component B is prepared from the following raw materials in parts by weight: 3-10 parts of a curing agent, 2-7 parts of a curing accelerator and 6-10 parts of a solvent. The coating disclosed by the invention has excellent corrosion resistance, wear resistance, low temperature resistance and anti-ultraviolet protection performance, and can meet the surface protection requirements of military equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and more specifically, to a protective coating for military equipment. Background Art

[0002] Different from ordinary mechanical equipment, military equipment (including military vehicles, etc.) will be transferred to various geographical environments in actual use. In addition to withstanding corrosion and reciprocating friction and wear under general environmental conditions, the coating used for component protection also needs to withstand environmental conditions such as high salt spray, low temperature, and strong solar radiation. The coatings currently used for military equipment are usually very expensive, especially in harsh environments, which makes their maintenance costs also very high. Commonly used industrial coatings are difficult to meet the protective properties of military equipment coatings in terms of corrosion resistance, wear resistance, low temperature resistance, and UV resistance. Therefore, if a protective coating with reduced cost and meeting the use needs of military equipment coatings can be developed, it will have broad application prospects. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a protective coating for military equipment, which has excellent corrosion resistance, wear resistance, low temperature resistance and UV resistance and can meet the surface protection requirements of military equipment.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A military equipment protective coating comprises component A and component B, wherein the mass ratio of component A to component B is 1:0.3-0.5, component A is prepared from the following raw materials in parts by weight: 28-45 parts of epoxy resin, 15-30 parts of polyurethane, 3-8 parts of ultra-high performance toughening agent SC-8828, 2-6 parts of sodium acetate, 1-5 parts of ultraviolet absorber, 1-3 parts of dispersant, 0.5-2.7 parts of defoamer, and 20-40 parts of solvent; and component B is prepared from the following raw materials in parts by weight: 3-10 parts of curing agent, 2-7 parts of curing accelerator, and 6-10 parts of solvent.

[0006] The present invention is further configured such that the ultraviolet absorber is at least one of Owen UV 6142, 1,4-di(o-phenylthio)phenyl-1,3-butadiyne, phenyl o-hydroxybenzoate, and 4-benzoyloxy-2,2,6,6-tetramethylpiperidine.

[0007] The present invention is further configured such that the curing accelerator is an organosilicon high temperature resistant paint curing agent LD-109.

[0008] The present invention is further configured such that the curing agent is one or more of polyisocyanate, ethylenediamine, triethylenetetramine, and m-phenylenediamine.

[0009] The present invention is further configured such that, in component A, the solvent is one or more of methanol, ethanol, xylene, n-butanol, ethyl acetate, dipropylene glycol methyl ether, and methyl isobutyl ketone.

[0010] The present invention is further configured such that the dispersant is one or more of sodium polyacrylate dispersant, dioctyl sodium sulfosuccinate, and sodium hexametaphosphate.

[0011] The present invention is further configured such that the defoaming agent is one or more of dimethyl silicone oil, phenylethyl oleate, stearyl stearate, and polydimethylsiloxane.

[0012] The present invention is further configured such that, in component B, the solvent is a mixture of one of methanol, ethanol, xylene, n-butanol, and dipropylene glycol methyl ether and water.

[0013] The present invention is further configured such that, in component B, the solvent is a mixed liquid of n-butanol and water in a mass ratio of 1:1-2.

[0014] The present invention is further configured to include component A and component B, the mass ratio of component A to component B is 1:0.4, component A is made of the following raw materials in parts by weight: 40 parts of epoxy resin, 22.5 parts of polyurethane, 5 parts of ultra-high performance toughening agent SC-8828, 3.7 parts of sodium acetate, 3.2 parts of ultraviolet absorber, 2 parts of dispersant, 1 part of defoamer, and 30 parts of solvent; component B is made of the following raw materials in parts by weight: 5 parts of curing agent, 3.5 parts of curing accelerator, and 8 parts of solvent.

[0015] In summary, the present invention has the following beneficial effects:

[0016] By modifying the coating with ultra-high performance toughening agent SC-8828, UV absorber and curing accelerator, the coating has excellent corrosion resistance, wear resistance, low temperature resistance, UV resistance and other protective properties, thereby meeting the surface protection needs of military equipment (such as military transport vehicles), and its cost can be reduced to 75-85% of the commonly used military coatings with the same performance; and the synergistic effect between ultra-high performance toughening agent SC-8828, Owen UV 6142, 1,4-di(o-phenylthio)phenyl-1,3-butadiyne and silicone high temperature resistant paint curing agent LD-109 can be used to further significantly improve the performance of the coating. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The military equipment protective coating of the present invention comprises component A and component B, wherein the mass ratio of component A to component B is 1:0.3-0.5, and component A is made of the following raw materials in parts by weight: 28-45 parts of epoxy resin, 15-30 parts of polyurethane, 3-8 parts of ultra-high performance toughening agent SC-8828, 2-6 parts of sodium acetate, 1-5 parts of ultraviolet absorber, 1-3 parts of dispersant, 0.5-2.7 parts of defoamer, and 20-40 parts of solvent; component B is made of the following raw materials in parts by weight: 3-10 parts of curing agent, 2-7 parts of curing accelerator, and 6-10 parts of solvent. Among them, the ultra-high performance toughening agent SC-8828 is purchased from Shenzhen Shencai Technology Co., Ltd.

[0019] In component A, the ultraviolet absorber is preferably at least one of Owende UV 6142, 1,4-di(o-phenylthio)phenyl-1,3-butadiyne, o-hydroxybenzoic acid phenyl ester, and 4-benzoyloxy-2,2,6,6-tetramethylpiperidine; 1,4-di(o-phenylthio)phenyl-1,3-butadiyne is prepared according to the method in the paper "Synthesis and Performance Research of New Ultraviolet Absorber 1,4-Diaryl-1,3-Butadiyne Compounds" (Wang Chen, Zhao Ziren, Shi Heping, Tian Wenjuan, Zhang Bianxiang, Imaging Science and Photochemistry. 2019, 37(02)). The dispersant is one or more of sodium polyacrylate dispersant, dioctyl sodium sulfosuccinate, and sodium hexametaphosphate. The defoamer is one or more of dimethyl silicone oil, phenylethyl oleate, stearyl stearate, and polydimethylsiloxane. The solvent is one or more of methanol, ethanol, xylene, n-butanol, ethyl acetate, dipropylene glycol methyl ether, and methyl isobutyl ketone.

[0020] In component B, the curing agent is one or more of polyisocyanate, ethylenediamine, triethylenetetramine, and m-phenylenediamine. The curing accelerator is the organosilicon high temperature resistant paint curing agent LD-109. The solvent is a mixture of one of methanol, ethanol, xylene, n-butanol, and dipropylene glycol methyl ether and water, preferably a mixture of n-butanol and water in a mass ratio of 1:1-2.

[0021] Preferred embodiment 1

[0022] Prepare the raw materials of component A and component B; mix the raw materials of component A evenly to obtain component A, which is made of the following raw materials in parts by weight: 40 parts of bisphenol A epoxy resin, 22.5 parts of polyurethane, 5 parts of ultra-high performance toughening agent SC-8828, 3.7 parts of sodium acetate, 3.2 parts of ultraviolet absorber (composed of Owen UV 6142 and 1,4-di(o-phenylthio)phenyl-1,3-butadiyne in a mass ratio of 1:1), 2 parts of sodium polyacrylate dispersant, 1 part of defoaming agent phenylethyl oleate, and 30 parts of solvent n-butanol; mix the raw materials of component B evenly to obtain component B, which is made of the following raw materials in parts by weight: 5 parts of curing agent (composed of triethylenetetramine and m-phenylenediamine in a mass ratio of 0.5:1), 3.5 parts of curing accelerator silicone high temperature resistant paint curing agent LD-109, and 8 parts of solvent (mixed with n-butanol and water in a mass ratio of 1:1.6). The mass ratio of component A to component B is 1:0.4.

[0023] Example 2

[0024] A protective coating was prepared according to the method of Example 1, except that the mass of Owende UV 6142 in Example 1 was replaced by phenyl o-hydroxybenzoate.

[0025] Example 3

[0026] The protective coating was prepared according to the method of Example 1, except that the 1,4-di(o-phenylthio)phenyl-1,3-butadiyne in Example 1 was replaced by phenyl o-hydroxybenzoate.

[0027] Comparative Example 1

[0028] The protective coating was prepared according to the method of Example 1, except that the ultra-high performance toughening agent SC-8828 was replaced by the salt spray resistance additive DZ-7405.

[0029] Comparative Example 2

[0030] The protective coating was prepared according to the method of Example 1, except that the organosilicon high temperature resistant paint curing agent LD-109 was replaced by N,N-dimethylbenzylamine.

[0031] The performance tests were conducted on the protective coatings of each embodiment and each comparative example (component A and component B were mixed at a mass ratio of 1:0.4, and the coating thickness was 60 μm; the low temperature resistance detection method was: after the test piece coated with the coating was cured, it was placed in a constant temperature and humidity tester, and after being placed at -50°C for X hours, the test piece was taken out and placed at 20-25°C for 2 hours, and bubbles, whitening, cracking, wrinkling, and rust appeared on the surface of the test piece, and the cross-cut test was ≤ level 2, where X hours was the low temperature resistance time of the coating), and the test results were shown in Table 1. It can be seen from the data in the table that the protective coating of the present invention has good protective properties such as corrosion resistance, wear resistance, low temperature resistance, and UV resistance, and the ultra-high performance toughening agent SC-8828, Owen UV 6142, 1,4-di(o-phenylthio)phenyl-1,3-butadiyne, and silicone high temperature resistant paint curing agent LD-109 have a synergistic effect (Example 2), which can further improve the performance of the coating.

[0032] Table 1

[0033]

[0034] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A protective coating for military equipment, characterized in that: The invention comprises component A and component B, wherein the mass ratio of component A to component B is 1:0.3-0.5, component A is prepared from the following raw materials in parts by weight: 28-45 parts of epoxy resin, 15-30 parts of polyurethane, 3-8 parts of ultra-high performance toughening agent SC-8828, 2-6 parts of sodium acetate, 1-5 parts of ultraviolet absorber, 1-3 parts of dispersant, 0.5-2.7 parts of defoamer and 20-40 parts of solvent; component B is prepared from the following raw materials in parts by weight: 3-10 parts of curing agent, 2-7 parts of curing accelerator and 6-10 parts of solvent.

2. A military equipment protective coating according to claim 1, characterized in that: The ultraviolet absorber is at least one of Owen UV 6142, 1,4-di(o-phenylthio)phenyl-1,3-butadiyne, o-hydroxybenzoic acid phenyl ester, and 4-benzoyloxy-2,2,6,6-tetramethylpiperidine.

3. The protective coating for military equipment according to claim 1, characterized in that: The curing accelerator is organic silicon high temperature resistant paint curing agent LD-109.

4. The protective coating for military equipment according to claim 1, characterized in that: The curing agent is one or more of polyisocyanate, ethylenediamine, triethylenetetramine, and m-phenylenediamine.

5. The protective coating for military equipment according to claim 1, characterized in that: In component A, the solvent is one or more of methanol, ethanol, xylene, n-butanol, ethyl acetate, dipropylene glycol methyl ether, and methyl isobutyl ketone.

6. The protective coating for military equipment according to claim 1, characterized in that: The dispersant is one or more of sodium polyacrylate dispersant, dioctyl sodium sulfosuccinate, and sodium hexametaphosphate.

7. The protective coating for military equipment according to claim 1, characterized in that: The defoaming agent is one or more of dimethyl silicone oil, phenylethyl oleate, stearyl stearate, and polydimethylsiloxane.

8. The protective coating for military equipment according to claim 1, characterized in that: In component B, the solvent is a mixture of one of methanol, ethanol, xylene, n-butanol, and dipropylene glycol methyl ether and water.

9. The protective coating for military equipment according to claim 1, characterized in that: In component B, the solvent is a mixture of n-butanol and water in a mass ratio of 1:1-2.

10. The protective coating for military equipment according to claim 1, characterized in that: The invention comprises component A and component B, wherein the mass ratio of component A to component B is 1:0.4, component A is prepared from the following raw materials in parts by weight: 40 parts of epoxy resin, 22.5 parts of polyurethane, 5 parts of ultra-high performance toughening agent SC-8828, 3.7 parts of sodium acetate, 3.2 parts of ultraviolet absorber, 2 parts of dispersant, 1 part of defoamer and 30 parts of solvent; component B is prepared from the following raw materials in parts by weight: 5 parts of curing agent, 3.5 parts of curing accelerator and 8 parts of solvent.

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