Powder paint for plastic coating of firefighting pipelines and manufacturing method thereof

Abstract

The invention discloses powder paint for the plastic coating of firefighting pipelines, which is characterized in that the powder paint consists of 30 to 60 mass percent of thermosetting resin, 4.5 to 30 mass percent of curing agent, 20 to 30 percent of paint and filler and 2 to 12 percent of assistant. The product disclosed by the invention can be used by electrostatic spraying, the film thickness reaches 300 to 400 mu m at one time of spraying, the performance of the film can reach requirements after one time of curing by baking, and the coating labor productivity is high. During spraying, the powder paint not sprayed can be recovered and reused, so the utilization rate of the paint is as high as over 98 percent. The powder paint can bear a high temperature of 300 DEG C and a low temperature of 30 DEG C below zero. After plastic coating, a high adhesive force is formed between the coating and the substrate. And compared with hot-galvanized firefighting pipelines, the firefighting pipe coated with the powder paint is more environmentally-friendly.

Description

Technical field: [0001] The invention relates to a thermosetting powder coating, in particular to a powder coating for plastic coating of fire-fighting pipes and a production method thereof. Background technique: [0002] Ordinary fire-fighting galvanized pipes and connectors have many problems in actual use due to their poor performance in terms of anti-corrosion, anti-scaling and anti-bacterial properties, coupled with the characteristics of long-term static and emergency use of fire-fighting water: First of all, due to the poor anti-corrosion performance of galvanized steel pipes and long-term erosion by water, the inner surface of the pipes is prone to rust, and the nozzles are easily blocked after the rust layer falls off; secondly, after the inner surface of the pipes is scaled, the inner diameter of the pipes is likely to shrink or be blocked. The water delivery and air volume are reduced to the point that it cannot be delivered, which affects the actual use effect; m...

AI Technical Summary

Problems solved by technology

[0002] Ordinary fire-fighting galvanized pipes and connectors have many problems in actual use due to their poor performance in terms of anti-corrosion, anti-scaling and anti-bacterial properties, coupled with the characteristics of long-term static and emergency use of fire-fighting water: First of all, due to the poor anti-corrosion performance of galvanized steel pipes and long-term erosion by water, the inner surface of the pipes is prone to rust, and the nozzles are easily blocked after the rust layer falls off; secondly, after the inner surface of the pipes is scaled, the inner diameter of the pipes is likely to shrink or be blocked. The water delivery and air volume are reduced to the point that it cannot be delivered, which affects the actual use effect; moreover, the most critical point is that if the above-mentioned situation occurs during the fire-fighting and disaster relief process, the consequences will be unimaginable if the disaster relief is delayed; the existence of the above-mentioned defects makes the galvanized pipe The service life is short, generally only 7-8 years

[0005] In order to solve the problem of plastic-coating of fire-fighting pipes, many manufacturers have taken action. Some directly use polyethylene powder coating plastic-coated steel pipes to make fire-fighting pipes, but the adhesion is very poor.

Especially now many manufacturers require plastic powder coating on the galvanized pipe, because zinc and iron form inverse potential corrosion in hot water, making the adhesion between the galvanized layer and the powder coating even worse