American Coatings Show 2018

16.4 Novel Structure Modified Fumed Silica Technology (SMS) Improves Anti-Fouling Performance in Cuprous OXIDE Based Coatings (Room 234-236)

11 Apr 18
11:30 AM - 12:00 PM

Tracks: Session 16: Biobased Coatings, Session 16: Bio-Fouling & Microbial Protection

Speaker(s): Maria Nargiello, Evonik Corporation; Inês Guinote; Tânia Chança; Susana Saraiva; Patrick Freira

Copper oxide based anti-fouling coatings are increasingly under regulatory scrutiny. Typically, very high loadings of copper oxide biocide are needed to achieve required high performance, sometimes higher than 50 weight-%. The amount of copper oxide can be reduced dramatically by incorporating a novel structure modified, nanostructured synthetic silica, while the coating still offers full anti-fouling performance. Formulating with structure-modified silica in marine coatings improves the stability of the surface. Thus, the coating is more durable and robust against abrasion that may occur for example during underwater cleaning. This paper addresses the effect of structure-modified, nanostructured silica in marine anti-fouling coatings. It will elaborate on the synergistic effect between silica and cuprous oxide and give results on the anti-fouling performance from field tests. Special focus will highlight the improved abrasion resistance and mechanical stability of marine coatings supported by applications data.