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Coating system for spacecraft exterior skins and preparation method of coating system

A technology for aircraft and outer skin, which is applied in the coating system and its preparation field for the outer skin of aircraft, and can solve the problem of poor gloss retention rate and color durability of the coating system, the influence of color rendering accuracy, and the decrease of the gloss of the coating system, etc. problems, to achieve the effects of excellent resistance to aviation media, excellent gloss and color retention, and excellent anti-aging properties

Active Publication Date: 2018-02-09
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance of the aircraft outer skin coating system formed by conventional coating systems can basically meet the needs of various types of aircraft in service, primers and topcoats are both solvent-based products. During the production and use of coatings, a large number of The volatilization of organic solvents into the atmosphere not only causes serious pollution to the environment but also causes a serious waste of energy and resources. It is also contrary to people's increasing awareness of environmental protection and strict restrictions on VOC emissions in various countries around the world; and due to the gloss of the final coating system The degree of sharpness and image clarity are directly related to the coating effect of the topcoat. Therefore, once defects such as orange peel, sagging, pinholes, and sandy surfaces appear in the topcoat, the gloss of the final coating system will be greatly reduced. The accuracy of color rendering will also be affected. Therefore, there are strict requirements on the quality of coating; in addition, the top coat is directly in contact with the atmospheric environment, and it is eroded by ultraviolet light, oxygen in the air and rain for a long time, and it is easy to powder, Loss of gloss, resulting in relatively poor gloss retention and color durability of the coating system

Method used

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  • Coating system for spacecraft exterior skins and preparation method of coating system
  • Coating system for spacecraft exterior skins and preparation method of coating system
  • Coating system for spacecraft exterior skins and preparation method of coating system

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preparation example Construction

[0046] The present invention also includes a method for preparing the coating system for the outer skin of the aircraft, comprising the steps of:

[0047] S1. Preparation of water-based anti-corrosion primer:

[0048] S101. Add the formulated amount of environmentally friendly anti-corrosion pigments, fillers, wetting and dispersing agents and part of deionized water into the mixing container and mix evenly, and grind and disperse to a fineness of ≤30 μm to prepare a water-based pre-dispersed slurry; put the water-based pre-dispersed Add the slurry into the water-based epoxy emulsion, use a high-speed disperser to stir at a speed of 400-600r / min for 15-25min, then add defoamer, anti-settling agent and anti-flash rust agent in turn, use a high-speed disperser to stir at a speed of 100-300r / min After stirring at a speed of 100-300r / min for 5-10min, add the remaining deionized water, use a high-speed disperser to continue stirring at a speed of 100-300r / min for 10-15min, and filt...

Embodiment 1

[0059] Preparation of coating system T-1

[0060] 1.1 Preparation of water-based anti-corrosion primer:

[0061] Table 1 Component A1 formula table

[0062]

[0063]

[0064] Refer to the ratio in Table 1 to prepare component A1, add environment-friendly anti-corrosion pigments, fillers, wetting and dispersing agents and part of deionized water into the mixing container and mix evenly, and grind and disperse to a fineness of ≤30 μm to obtain a water-based pre-dispersion slurry; add the water-based pre-dispersed slurry into the water-based epoxy emulsion, use a high-speed disperser to stir at a speed of 400r / min for 25min, then add defoamer, anti-settling agent and anti-flash rust agent in turn, use a high-speed disperser to 300r / min After stirring at a speed of 10 min, add the remaining deionized water, use a high-speed disperser to continue stirring at a speed of 300 r / min for 10 min, and filter with a 200-mesh silk screen to obtain component A1;

[0065] Table 2 Comp...

Embodiment 2

[0081] Preparation of coating system T-2

[0082] 2.1 Preparation of water-based anti-corrosion primer:

[0083] Table 5 Component A1 formula table

[0084]

[0085] Refer to the ratio in Table 5 to prepare component A1, add environment-friendly anti-corrosion pigments, fillers, wetting and dispersing agents and part of deionized water into the mixing container and mix evenly, and grind and disperse to a fineness of ≤30 μm to obtain a water-based pre-dispersion slurry; add the water-based predispersed slurry to the water-based epoxy emulsion, use a high-speed disperser to stir at a speed of 600r / min for 15min, then add defoamer, anti-settling agent and anti-flash rust agent in turn, use a high-speed disperser to 100r / min After stirring at a speed of 10 min, add the remaining deionized water, use a high-speed disperser to continue stirring at a speed of 300 r / min for 15 min, and filter with a 200-mesh silk screen to obtain component A1;

[0086] Table 6 Component B1 formula ...

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Abstract

The invention discloses a coating system for spacecraft exterior skins. The coating system comprises waterborne anticorrosive priming paint, waterborne coloring intermediate paint and solvent-free coating varnish by matching. The waterborne anticorrosive priming paint is prepared from a component A1 and a component B1 with the mass ratio of (3-5):1, the waterborne coloring intermediate paint is prepared from a component A2 and a component B2 with the mass ratio of (8-12):1, the solvent-free coating varnish is prepared from a component A3 and a component B3 with the mass ratio of (2-5):1, wherein the component B3 is HDI (hexamethylene diisocyanate) tripolymer cross-linking agents, the component A3 is prepared from, in weight percent, 70-80% of solvent-free polyhydric alcohol, 19-29% of polycaprolactone dihydric alcohol resin, 0.1-2% of leveling agents, 0.05-0.15% of acetylacetonate salt catalysts and 0.1-0.4% of ultraviolet absorbers. The coating system is free from VOCs (volatile organic chemicals) and good in ornamental feature, and has excellent gloss retention rate and color persistence.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a coating system for an aircraft outer skin and a preparation method thereof. Background technique [0002] At present, conventional coating systems for aircraft outer skins generally consist of anticorrosion primers and colored topcoats. Generally, the dry film thickness of the coating formed by the primer is about 15-25 μm, and the dry film thickness of the coating formed by the topcoat is about 50-80 μm. Although the performance of the aircraft outer skin coating system formed by conventional coating systems can basically meet the needs of various types of aircraft in service, primers and topcoats are both solvent-based products. During the production and use of coatings, a large number of The volatilization of organic solvents into the atmosphere not only causes serious pollution to the environment but also causes a serious waste of energy and resources. It is also contrary ...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D133/00C09D175/06C09D5/08C09D7/61C08G18/79C08G18/42
CPCC08G18/4202C08G18/4277C08G18/792C08K3/04C08K3/34C08K2003/2241C08K2003/3045C08K2003/321C08K2003/327C09D5/084C09D133/00C09D163/00C09D175/06
Inventor 周如东李文凯王李军朱亚君赵宝华刘志远陆文明潘云飞郭亮亮周丽付敏朱晓丰王留方
Owner CHINA NAT OFFSHORE OIL CORP
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