Light Stabilizers Make The UV Protection Of Waterborne UV-curable Coatings Easier

Specialty Chemical Business Unit, Everlight Chemical Industrial (Taiwan)

Abstract:UV curing processes have been used extensively in many different industries such as packaging, printing inks and protective coatings for wood, plastics and metal. Advantages of UV curing are instant drying, low operating cost, improved quality and reduced space.

     Waterborne UV curable coatings - green coatings - have been developed to replace conventional UV curable coating with VOC emissions. It can be a challenge when light stabilizers are required to protect coatings to UV degradation.

     The novel light stabilizer (NLS) is developed specifically for waterborne UV curable coats. This article is a comparison study of three different light stabilizers to disperse in water and waterborne UV curable coating. Test data showed that NLS in a waterborne clear UV curable coating would not have negative impacts to cure speed. The results confirmed that by increasing the concentrarion of NLS in the top coat can effectively protect from UV light degradation.