The composition of UV-curing coatings

UV-curing technology has developed rapidly due to its own characteristics. At present, UV-curing coating and its equipment has been widely in chemicals, machinery, electronics, light industry, telecommunications and other fields. Light curing paint including: UV curing wood coating (bamboo wood floor, decorative Board), furniture, ; UV curing plastic coating (car parts, devices, CD, credit card); UV curing metal coating (steel rust, color coated plate, printing iron); UV curing paper coating (decorative paper, label, card, and written surface glazing, and metal of coating); etc. With the increasing emphasis on environmental protection, UV curable coatings are replaced or partially replace the traditional coating.

At present despite the wide variety of UV-curing coatings and performance, but main ingredients typically include photo-initiators, reactive diluents, reactive oligomers, pigments, fillers and improved film properties support additive. Photoinitiators in the coating formulations make up small proportion (usually 3%~10%), but the role is critical in UV-curing coating formulations, UV-curing reaction does not work if it is missing. Reactive diluent in UV-curing coatings in addition to dilution, adjust viscosity, but also participate in light curing reactions, influencing the curing speed and the mechanical properties of paint films. Selective active diluent should consider the following factors in UV-curing coatings wood paints: viscosity, toxicity, irritation, volatility, volume, responsiveness, solubility of photoinitiator and resin, thermal stability and so on.

Reactive oligomers are photosensitive resin and the main part of UV-curing coatings, which largely determine the value of the main properties of the cured paint film, therefore, reactive oligomers is an important part of UV-curing coating formulation. Reactive oligomers include many types of acrylic resins, such as epoxy acrylate, urethane, polyester acrylates and polyether acrylate and acrylic resin, etc. But the most used are epoxy acrylate and urethane acrylate.

Unsaturated polyester resin can also be used for UV-curable wood coatings, but it's lacks flexibility in the formula and has many disadvantages, as a result it is basically been eliminated in modern UV-curing coatings. UV curing coating is high curing efficiency, environmental, energy-saving, productive and can for line job, they are widely applied to chemical, mechanical, electronic, and some other field. UV-curable Wood coatings in our life mainly used for furniture, bamboo, wood flooring and so on. As it greatly improves customer productivity, which has been widely welcomed. But before you use UV paint, first you need to adjust the UV coating equipment to make sure it is in the best condition, such as various devices parameters of roller coating machines, curtain coating machines and UV light curing machine, etc. Click here!