Patent ID: 7618697

Claim:
A method of protecting a surface against biofouling accumulation, comprising applying to said surface an antifouling composition comprising one or more compounds of formula 1 where R is C 1-24 alkyl, C 3-24 alkenyl, said alkyl or alkenyl substituted one or more times by C 1-4 alkyl, OH, C 1-8 alkoxy, C 2-6 alkylcarboxy or halogen or interrupted by one or more oxygen atoms or carbonyl; or R is C 5-12 cycloalkyl, C 7-12 aralkyl, C 6-10 aryl or a 5-10 membered heterocycle or said cycloalkyl, aralkyl, aryl or heterocycle substituted one or more times by C 1-4 alkyl, OH, C 1-8 Alkoxy, C 2-6 alkylcarboxy or halogen and M is H, a nitrogen cation, phosphorus cation or metal cation.