Studies on biocide release and performance of novel anti‐fungal paints

Abstract

The controlled release of an isothiazolone fungicide, C9211 (4,5-dichloro-2-(n-octyl)-3(2H)-isothiazolone) from a urethane oil paint is described. Leaching experiments showed that the amount of C9211 in the leachates was proportional to the loading in the paint. Paints containing 8% C9211 in the undercoat but none in the topcoat released C9211 in the same amounts as paints containing 4% C9211 in both undercoat and topcoat and the field performance of both paint combinations were identical. These results indicate that the C9211 is able to migrate through the urethane oil matrix replenishing any lost from the surface and thus giving effective antifungal control as long as biocide remains in the bulk of the paint.

Sea‐Nine™ 211 (4,5‐dichloro‐2‐(n‐octyl)‐3(2H)‐isothiazolone) is a Potent Stimulator of Eicosanoid Biosynthesis in the Sea Squirt,Ciona intestinalis(L.)

“…Sea-Nine™ 211 is a potent antifouling isothiazolone compound, often added at low concentrations to marine paints (Heaton et al, 1991). Its mode of action is currently not fully understood, but it has long been recognised as an effective antimicrobial agent, active against a wide spectrum of bacteria and fungi (Miller & Lovegrove, 1980).…”