New developments in water-borne resins for industrial coatings

Conclusions  Several examples of water-borne resins for industrial coatings have been discussed. Water-borne two-pack systems for metal substrates as well as one-component systems for wood, showed interesting properties. These resins can be regarded as the first products of a new generation, where-in, good performance is combined with compliance with environmental legislation.     

New developments in corrosion and blister formation in coatings

Many polymers take up more water at equilibrium at higher temperatures than they do at lower temperatures. Water exposure with cycling temperatures can lead to excess free water when films saturated with water at a higher temperature are quenched or rapidly cooled. This mechanism has been called microfogging with soluble water exuded at lowered temperatures (SWEAT) being the undesired result. The water freed by this process can cause microcavities, blisters, and even total delamination. Means to counteract these failures include increasing permeation coefficients using micaceous iron oxide or other void-containing filler, for example. The intended incorporation of microvoids (microsponges) also allows the SWEAT water to collect in the coating without causing excess damage. A polymeric binder which dissolves the same amount of water at all temperatures would eliminate this effect at its source.     

抗菌粉末涂料

以无机氧化物包覆银离子抗菌剂制备的抗菌粉末涂料抑菌效果好、时效长。介绍抗菌添加剂 ,抗菌粉末涂料的涂膜性能及抗菌效果。     

UV固化粉末涂料

叙述了紫外固化粉末涂料的机理、生产、施工及光引发剂的选择,并给出Uvecoat系列树脂的应用范围。