Coating composition for rapidly repairing damaged skin coat of spacecraft

An aircraft and composition technology, applied in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problems of long repair cycle, non-conductive oxide film, environmental pollution, etc., achieve excellent medium resistance performance, and ensure cross-linking density. , the effect of improving the overall performance

Active Publication Date: 2015-03-04
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two surface protection treatment methods have problems such as serious waste of energy and resources, complicated process, high labor intensity of workers, serious environmental pollution, and long repair period to varying degrees.
For example, the disadvantages of the chemical oxidation surface protection treatment method are: ①For the oxidized skin material, the treatment effect is relatively poor; ②The primer must be painted within 24 hours after treatment, which limits the freedom of construction; Rinse with a large amount of deionized water. The rinsed water contains chromium ions, which is likely to ca

Method used

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  • Coating composition for rapidly repairing damaged skin coat of spacecraft
  • Coating composition for rapidly repairing damaged skin coat of spacecraft
  • Coating composition for rapidly repairing damaged skin coat of spacecraft

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0032] Example 1 Preparation of component A

[0033] The various components and their mass percentages of component A of the coating composition of the present invention are as follows: medium and high molecular weight epoxy resin 15%-25%, modified resin 2%-12%, conventional pigments and fillers 15%-30% , Environment-friendly anti-corrosion pigment 15%-30%, auxiliary 0.5%-1%, the balance is composed of solvent.

[0034] (1) Prepare raw materials

[0035] Prepare the raw materials according to the ratio in Table 1.

[0036] The components and their mass percentages of component A of Example 1 are as follows: 21% of medium-high molecular weight epoxy resin, 2.5% of modified resin, 22.2% of conventional pigments and fillers, 15.5% of environmentally friendly anticorrosive pigments, and 0.7% of additives %, the solvent is 38.1%. The specific formula is shown in Table 1.

[0037] Table 1

[0038]

[0039]

[0040] Note: R-902 is a rutile type titanium dioxide produced by DuPont in the Unite...

Example Embodiment

[0043] Example 2 Preparation of component B

[0044] (1) Prepare raw materials

[0045] ① Prepare the raw materials for the epoxy-amine adduct according to the proportion in Table 2.

[0046] Example 2 The epoxy-amine adduct is composed of 7.1wt% of liquid epoxy resin, 23.6wt% of polyamine with primary amine groups, and 69.3wt% of solvent. See Table 2 for the specific formula.

[0047] Table 2

[0048]

[0049]

[0050] ②Prepare the raw materials for epoxy-polyaminoalkoxysilane adduct according to the proportion in Table 3.

[0051] Example 2 The polyaminoalkoxysilane adduct is composed of 6.7% by weight of liquid epoxy resin, 20% by weight of polyaminoalkoxysilane, and 73.3% by weight of solvent. The specific formula is shown in Table 3.

[0052] table 3

[0053]

[0054] (2) Preparation method

[0055] ①Preparation of epoxy-amine adduct

[0056] In the reactor, add the polyamine with primary amine group and the solvent prepared in step (1) according to the formula in Table 2, after heating...

Example Embodiment

[0062] Example 3 Preparation of coating composition

[0063] Before construction, weigh the component A prepared in Example 1 and the component B prepared in Example 2 according to the mass ratio of component A to component B of 5:1, mix them evenly, and then prepare it for rapid repair of aircraft damage. The coating composition that damages the skin coating has a solid content of 65wt%, a viscosity of 20 seconds (coating-4 cups, 23°C), and a construction period of 6 hours.

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Abstract

The invention relates to a coating composition for rapidly repairing a damaged skin coat of a spacecraft. The coating composition comprises a component A and a component B, wherein the component A comprises the following components in percentages by mass: 15%-25% of medium-high molecular weight epoxy resin, 2%-12% of modified resin, 15%-30% of conventional-type pigment and filler, 15%-30% of environment-friendly anti-corrosion paint, 0.5%-1% of additive and the balance of the solvent; the component B comprises the following components in percentages by mass: 60%-90% of epoxy-amine adduct, 10%-40% of epoxy-polyaminoalkoxysilane adduct, and the sum of epoxy-amine adduct and epoxy-polyaminoalkoxysilane adduct is 100%; before construction, the component A and the component B are evenly mixed at a mass ratio of (4 to 6): 1. The coating composition has excellent comprehensive performance which is comparable to that of the novel coating system, the repair time is shortened, the repair efficiency is increased, the wastes of energy and resources are decreased and the labor intensity of workers is reduced.

Description

technical field [0001] The invention relates to a coating composition for quickly repairing damaged skin coatings of aircraft. Background technique [0002] Due to the harsh operating environment of aircraft, its skin coating is prone to damage or even peeling off during operation. In order to prevent the exposed skin material from being corroded and affect the life and flight safety of the aircraft, it is necessary to repair the damaged coating. The repair process of the damaged aircraft skin coating includes four steps: ①partial paint removal or slight grinding, ②surface protection treatment, ③spraying protective primer and ④spraying protective topcoat, among which, step ② is the most important step in the repairing process. The quality of the key process directly affects the performance of the whole skin coating system after repair. At present, the methods commonly used in step ② include chemical oxidation surface protection treatment and phosphating primer surface prot...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D7/12C08G59/56C08G59/50
CPCC08L2205/025C08L2205/035C09D5/08C09D7/65C09D163/00C08L63/00C08K13/02C08K5/1515C08K2003/2241C08K3/34C08K3/04C08K2003/321
Inventor 周如东王李军赵宝华陆文明李文凯朱亚君王留方
Owner CHINA NAT OFFSHORE OIL CORP
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