Abstract:
The anti-fouling compositions and process described herein are capable of preventing or delaying for prolonged periods the fouling of structures such as boats, ships, piers, etc. , having substantial portions thereof submerged in water. These compositions comprise a number of components, some of which may be coreacted, including: (a) an organic polymeric material having carboxylic acid groups therein which have been reacted with a trihydrocarbyl tin compound to produce ester derivative groups therein; (b) a hydrophilic component having poor water solubility, preferably being water insoluble, polyvinyl acetate and copolymers of vinyl chloride and vinyl acetate; (c) a hydrophobic component comprising a compound having 1-3 urethane groups therein and no more than about 20 carbon atoms preferably made by the reaction of an isocyanate compound, such as diisocyanate, with one or more hydroxy-containing solvents, such as ethanol, propanol, ethylene glycol monoethyl ether, etc. , or a monoisocyanate with a di- or tri-hydroxy compound such as ethylene glycol, propylene glycol, glycerine, etc. , preferably in the presence of low molecular weight ketones, esters and aromatic hydrocarbons, such as methyl ethyl ketone, cyclohexanone, toluene, etc.