Effect of Flow Modifiers on the Quality of Powder Coatings

摘要

Defects in powder coatings are often caused by undesirable surface flow during the film formation stage. The use of a flow modifier at a low level in the powder coating formulation helps to create even surface tension across coating film surface. Flow additives assist in the control of surface flow and minimize the formation of surface defects in powder coatings. This paper describes the development of a new flow modifier which enhances the film formation in terms of flow and leveling, and the coating performance with respect to inter-coat adhesion, surface defect control, and cross-compatibility. Further, this paper discusses the mechanistic study of how flow modifiers work in powder coating systems.