Roll line solution for repairing surface coating of railway vehicle seamlessly and preparation method and application of roll line solution

Abstract

The invention discloses a roll line solution for repairing a surface coating of a railway vehicle seamlessly and a preparation method and application of the roll line solution. The roll line solution is prepared from 55-75 parts by weight of mixed dibasic acid ester (PME), 20-40 parts of ethylene glycol monoethyl ether acetate (CAC), 0-10 parts of butyl acetate, 3-10 parts of mono-component acrylic resin, 0.2-0.6 part of defoaming agent and 0.4-0.8 part of flatting agent. The preparation method comprises the steps of: firstly, weighing all components in the terms of weight proportion; secondly, putting all the components in a container, and rapidly and uniformly stirring; and finally, standing for 8-15min. During the use, a local defect part of the surface coating of the railway vehicle is conventionally treated and subjected to paint repair, then the roll line solution is sprayed for the first time in a connector position of a new paint film coating and an old paint film coating and is sprayed for the second time after 50-70s, and after the paint films are actually dried, the seamless effect of consistent appearances of the new coating and the old coating can be achieved. The roll line solution can ensure that no seam exists on the appearances of the new coating and the old coating through visual inspection by once repairing the local defect, thereby being especially suitable for the requirement of integrally consistent appearances of high-performance railway vehicles.

Description

technical field [0001] The invention relates to a coating on the surface of a railway vehicle, in particular to a spout liquid for non-mark repairing of the surface coating of a railway vehicle and its preparation method and application. Background technique [0002] After the surface of the railway vehicle is painted, there are often unavoidable local defects on the surface of the paint film, including sagging, roughness, pinholes, scratches, pollution, etc. Especially for some export or special railway wagons with high protection and high decorative performance requirements, visible paint film defects on the outer surface are not allowed to exist, which requires paint film repair. [0003] At present, what generally adopt for the processing of these defects is the method of partial repair or whole vehicle repainting. The local repair method is mainly to borrow the mouthpiece liquid on the market for small-area sprayed surfaces such as automobiles. Due to the large volume...

AI Technical Summary

Problems solved by technology

Due to the large volume of railway vehicles, complex external structure, manual operation of paint coating, large difference in surface coating performance and automobile coating, and the influence of construction environment factors, the existing jetting liquid treatment is used. The appearance of the paint layer is still significantly different, resulting in poor overall appearance quality of the vehicle, which cannot meet the requirements of high-quality railway vehicle coating repair

However, the overall repainting method not only wastes a lot of manpower and paint materials, takes a long time to operate the process, and keeps the cost high, but also cannot guarantee that the vehicle after repainting will no longer have new defects

It can be seen that it is difficult to meet the overall uniform appearance requirements of high-performance railway vehicles by using these two traditional treatment processes