Adaptive Speckle Imaging Interferometry (A.S.I.I.): New Technology for Advanced Drying Analysis of Coatings

摘要

Recent E.U. environmental legislations on the emission of volatile organic compounds force coatings manufacturers to re-formulate their products to reduce more and more the VOC content. Manufacturers tend to develop more waterborne coatings and to re-formulate their solventborne products in water. New formulations meet the European requirements (low VOC content) but undergo different drying processes. Waterborne coatings have different drying times, poorer gloss, and are more prone to defects such as sagging, blisters and orange peel. Control and understanding of the film formation process remains thus of great importance.