Hull coating with a touch of silicone-hydrogel

ERJ staff report (TP)

Copenhagen, Denmark − Coatings supplier Hempel has launched Hempaguard, a new hull coating concept that offers both resistance to fouling during idle periods and fuel savings, reported Marine Log.

The ActiGuard technology used in Hempaguard has been five years in development and integrates silicone-hydrogel and full diffusion control of biocides in a single coating. Surface retention of the biocide activates the hydrogel, which effectively holds fouling organisms at bay, cutting friction to a minimum while utilising a minimum amount of biocide. It also has the long-term stability and mechanical properties required of a durable solution.

Hempel is convinced of Hempaguard's performance and offers a performance satisfaction guarantee.

"If you are not satisfied for any reason using Hempel's top tier product Hempaguard X7," says Group Product Manager Torben Rasmussen, "Hempel will pay, under the performance satisfaction guarantee contract, for the conversion of Hempaguard back to conventional antifouling and with no questions asked."

Hempaguard releases 95 per cent less biocide than a standard SPC (self-polishing co-polymer antifouling). Moreover, the biocide is retained on the surface, thus eliminating the need for polishing, as well as requiring only one coat compared to the two or three that are normally necessary for antifouling. The surface has the same smoothness as conventional biocide-free silicone-based fouling release coatings. Trials at sea and idle period tests over five years have demonstrated very high level of fouling prevention compared to standard SPC antifouling products.

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Full story from Marine Log