ABSTRACT

The paper aims to show how the performance of paint coatings is affected by their composition. Samples of two paint coatings, which had delaminated in service, were compared with the same type of paint applied to samples for the purposes of certification. The particle size distribution of the filler materials (inert pigments) affected the flow of resin and wetting of the particles. In both failed samples, large particles sizes had agglomerated creating voids and crevices, resulting in poor wetting by the resin. This poor wetting and inherent lack of bonding had resulted in their premature failure. Both equivalent laboratory samples had a much better particle size distribution, with a lower maximum particle size, resulting in inert pigment being well distributed through the paint layer. The paper concludes that tighter control over the sizes of additives in paint such as inert pigments within Standards is needed to ensure better performance.

摘要

本文旨在展示涂料涂层的性能如何受到其组成的影响。将使用中已脱层的两种涂料的样品与用于认证目的的相同类型的涂料进行比较。填料（惰性颜料）的粒度分布影响树脂的流动和颗粒的润湿。在两个不合格的样品中，大颗粒都聚集了起来，形成了空隙和缝隙，导致树脂的润湿性差。这种较差的润湿性和固有的缺乏粘结性导致了它们的过早失效。两种等效的实验室样品均具有更好的粒径分布，而最大粒径较低，从而导致惰性颜料在涂料层中分布均匀。