A coating composition for quickly repairing damaged skin coatings of aircraft

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

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

CN104387916BActive Publication Date: 2016-08-31CHINA NAT OFFSHORE OIL CORP +3

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Experimental program

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Effect test

Embodiment 1

[0032] Embodiment 1 prepares component A

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

[0034] (1) Preparation of raw materials

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

[0036] The components and their mass percentages of Example 1 component A are as follows: 21% of medium and high molecular weight epoxy resin, 2.5% of modified resin, 22.2% of conventional pigment and filler, 15.5% of environment-friendly anti-corrosion pigment, and 0.7% of auxiliary agent %, the solvent is composed of 38.1%, and the specific formula is shown in Table 1.

[0037] Table 1

[0038]

[0039]

[0040] ...

Embodiment 2

[0043] Embodiment 2 prepares component B

[0044] (1) Preparation of raw materials

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

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

[0047] Table 2

[0048]

[0049]

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

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

[0052] table 3

[0053]

[0054] (2) Preparation method

[0055] ① Preparation of epoxy-amine adducts

[0056] In the reaction kettle, add the polyamine and solvent with primary amino groups prepared in step (1) according to the formula amount in Table 2, and...

Embodiment 3

[0062] Embodiment 3 prepares 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 and component B to be 5:1, and mix them evenly to obtain a The coating composition with damaged 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

Patent Timeline

31 Aug 2016

Publication

CN104387916B

IPC: C09D163/00; C09D5/08; C09D7/12; C08G59/56; C08G59/50

CPC: C08L2205/025; C08L2205/035; C09D5/08; C09D7/65; C09D163/00; C08L63/00; C08K13/02; C08K5/1515

Inventors: 周如东; 王李军