Antifouling composition

Claim 1

An antifouling composition which comprises a mixture of (A) one or more dithiocarbamic acid derivatives selected from the group consisting of (1) a dithiocarbamate having the formula ##STR18## wherein R 1 " and R 2 " are the same or different and are selected from the group consisting of hydrogen, methyl, ethyl, propyl, butyl, phenyl, morpholinyl and piperazinyl, M is Zn, Ni, Mn, Cu, Co, Pb, Fe, Sn, Ag or Hg, and n is the valence of M, (2) a metal salt of dithiocarbamic acid having the formula ##STR19## wherein A is ethylene, propylene or butylene, M' is Zn, Ni, Mn, Cu, Co, Pb, Fe, Sn and Hg, and m and l are integers as follows: m is 1 and l is 2 when M' is monovalent, m is 1 and l is 1 when M' is divalent, m is 3 and l is 2 when M' is trivalent, and m is 2 and l is 1 when M' is tetravalent: (3) a polymer of metal dithiocarbamate having the formula of ##STR20## wherein M and A have the same meanings as defined above, (4) metal salts of dithiocarbamic acid having the formula ##STR21## wherein R 3 " and R 4 " are the same or different and are selected from the group consisting of hydrogen, methyl, ethyl, propyl, butyl, phenyl, morpholinyl and piperazinyl, a is an integer of 1 to 10 and M, A, R 1 " and R 2 " have the same meanings as defined above, (5) thiuram disulfides having the formula ##STR22## wherein R 1 ", R 2 ", R 3 " and R 4 " have the same meanings as defined above, and (6) thiuram monosulfides having the formula ##STR23## wherein R 1 ", R 2 ", R 3 " and R 4 " have the same meanings as defined above, (B) one or more organotin compounds selected from the group consisting of polymers having recurring, first structural units of the formula ##STR24## copolymers of monomers having said first structural unit and an acrylic or vinyl monomer, polymers having recurring second structural units of the formula, ##STR25## copolymers of monomers having said second structural unit and an acrylic or vinyl monomer, organotin compounds having the formula ##STR26## and organotin compounds having the formula ##STR27## wherein R 1 , R 2 and R 3 are the same or different and are selected from the group consisting of alkyl, phenyl and cycloalkyl, X and Y are hydrogen or methyl, R 1 ', R 2 ' and R 3 ' are the same or different and are selected from the group consisting of alkyl, phenyl and cycloalkyl, Z is halogen, ester group, acyl group, a monovalent functional group containing sulfur, a monovalent functional group containing oxygen or an acyl group which is partially substituted by a halogen; and W is a divalent functional group containing oxygen or sulfur.