new types powder coating

According to experts, the epoxy powder coating is the most important, but also where performance best a, with its excellent adhesion, flexibility, and excellent resistance to corrosion and 

anticorrosion life, by the market worldwide attention and welcome. With the rapid development of outdoor building materials, home appliances, and all kinds of vehicles is increasing, the increasing demand for paint products, regardless of the quantity or variety performance requirements, and put forward the many to be paint industry, and raw materials production plant to address the topic. Because of its high coating efficiency and no pollution, powder coatings are still of great significance to develop new epoxy powder coatings, especially new epoxy resins. In the epoxy resin structure, bisphenol A skeleton, has the good flexibility ether chain, the film 

has good physical and mechanical properties. The color matching of powder coatings is good, and the selection range of curing agent is wide. Powder coatings with good adaptability, can be used 

electrostatic powder spraying, fluidized bed coating, flame spraying and air spraying and other coating method.

According to experts, low molecular weight alicyclic shrink diglycidyl ether type epoxy resin preparation method is usually the use of resin ring family polyol as raw materials, in the reaction of acid catalyzed conditions with epoxy chloropropane in formation of chlorohydrin ether, then chlorine ether in the presence of alkali removal of hydrogen chloride, forming shrink glycerol ether. With national requirement for environmental protection is more and more strict, the traditional solvent based coatings development limited, powder coating for coating of environmental protection type has been considerable development, but we also should see soberly, so far, the production of powder coatings is only accounted for about 5% of the coating. In China, powder coatings are mainly used in the following five fields: automotive industry, shipbuilding industry, pipe industry, thermal sensitive materials and construction. With the powder coating for building materials, its coating efficiency, protection and decoration and other advantages of good comprehensive performance, has been widely valued by the world. 

The reason for the coating particles produced in powder coating in the gel, causing insoluble particles and impurities. Fine particles of powder coatings in easy accumulation change the site of airflow direction in the coating device and spray head or in the pipeline, when accumulated to a certain degree the state of aggregation spray out attachment is painted above, baking does not melt and become diameter for 0.5-3 degree of particles attached in the spraying chamber wall and recycling equipment gelatinizer: manufacturing powder coating process due to a pigment produced 

condensates.