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Polyurethane lacquers as abrasion-resistant coatings

A wear-resistant coating and polyurethane technology, applied in polyurea/polyurethane coatings, coatings, devices for coating liquid on the surface, etc., can solve the problems of time-consuming cleaning and bonding processes, and achieve favorable and destructive treatment methods The effect of small, increased wear resistance

Inactive Publication Date: 2010-01-13
AIRBUS OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of solvent-based cleaning agents is increasingly seen as undesirable
[0009] - The cleaning and joining process is very time consuming

Method used

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  • Polyurethane lacquers as abrasion-resistant coatings
  • Polyurethane lacquers as abrasion-resistant coatings
  • Polyurethane lacquers as abrasion-resistant coatings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Example 1: Wear test according to PrEN 6124:

[0072] Wear tests according to PrEN 6124 are carried out on a dedicated wear test rig in order to simulate as precisely as possible the wear behavior that would occur, for example, on an aircraft landing flap during operation.

[0073] For this purpose, the varnish to be tested is applied to a sample metal sheet (aluminum) and the varnish together with the sample sheet is fixed on the sample stand of the friction test stand.

[0074] The painted sample sheet metal corresponds to the painted protected area of ​​the landing flap. exist image 3 A friction test rig 10 according to PrEN 6124 is shown in . The friction test bench 10 has three load containers 12 filled with tungsten powder, each having a weight of G=566N. The load cell 12 is secured in a height-adjustable and lockable first specimen holder 14 supported by a linear guide. In each case, the weight of the load cell 12 loads the linear guide supported second spec...

Embodiment 2

[0092] Embodiment 2: temperature test / thermal yellowing test:

[0093] The paint systems to be tested were applied to aluminum panels of type 2024T3 commonly used in aircraft construction and stored at room temperature for 7 days. Each chromaticity is then measured with a colorimeter as a standard. The samples are then immediately stored at a temperature of 110° C. or 150° C., such as may occur on the surface of an aircraft in a hot climate. After storage at high temperature for 100 hours, the color difference is determined by comparison with a standard (starting value).

[0094] The color space in colorimetric measurement consists of the values ​​Da (red / green axis), Db (blue / yellow axis) and DL (light / dark axis). As a value consisting of the three above-mentioned values, DE describes the degree of similarity of two chromaticities in a chromaticity comparison. In this case, the Db value and DE value are criteria for color changes due to UV light or thermal stress. In comp...

Embodiment 3

[0097] Example 3: Cross-cut test according to DIN EN ISO 2409:

[0098] The adhesion of certain lacquers was investigated by means of a cross-cut test according to DIN EN ISO 2409.

[0099] The lacquers used according to the invention clearly have particularly good properties here.

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Abstract

Disclosed is the use of a lacquer comprising a polyurethane matrix based on aliphatic components as well as fillers which are embedded in the polyurethane matrix and increase resistance to abrasion, as an abrasion-resistant coating of (a) aircraft landing flaps (2) in the contact zone with the spoilers (4), (b) in the abrasive zone of the cargo doors, or (c) in the abrasive zone of other aircraft components that mechanically produce friction on top of each other. Also disclosed are corresponding landing flaps and lacquers.

Description

technical field [0001] The present invention relates primarily to the use of specific filled polyurethane lacquers as wear-resistant coatings, in particular as wear-resistant coatings for visible wear areas of aircraft components which mechanically rub against each other during operation. Background technique [0002] Modern aircraft have spoiler-related landing flaps located in the rear area of ​​the wing when viewed in the direction of flight, such as figure 1 shown. The landing flaps are retracted or deployed to adjust certain aerodynamic properties during takeoff and landing. like figure 2 As shown, during this process, the spoiler rubs or wears down part of the landing flap area, so this area must be protected from damage. [0003] Currently, areas of landing flaps that are at risk of wear in the aircraft structure are protected by the application of thin steel sheets known as wear protection strips or wear protection metal plates. Apply the wear protection strips ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C7/00B64C9/02B64C9/14B64C9/16B64C9/22B64C9/32B64C1/14C09D175/04
CPCB64C7/00B64C9/14Y02T50/44C08K3/34C08L23/04B64C9/02Y10T428/25B64C9/16C08K3/22C09D175/04B64C9/22B64C9/323B64C9/32C08L2666/54C08L2666/06B05D5/00Y02T50/40
Inventor 福尔克马尔·施滕策尔马丁·考内胡贝图斯·洛纳奥特马尔·施拉姆
Owner AIRBUS OPERATIONS GMBH