| abstract |
A marine stainproofing agent comprises A) 4,5-dichloro-2-n-octylisothiazoline-3-one; B) a polymer comprising one or more monopolymers of unsaturated monomers having the formula (1), <IMAGE> wherein X is H or Me, n is an integer of 1-50, and R<1> is (C1-C18)alkyl or (C1-C18)acyl. or hydrophilic copolymers of other unsaturated monomers and the above monomers; C) one or more of: (i) at least one dialkylpolysulfide derivative of the formula (2> R<2>-(S)m-R<3> (2> wherein R<2> and R<3> are each independently (C1-C20)alkyl, and m is an integer of 1-5, (ii) a polybutene having a degree of polymerization of 2-100, (iii) a xylene/formaldehyde polycondensation product having an average molecular weight of 300-1000, or (iv) a C9 aromatic hydrocarbon/formaldehyde polycondensation product having an average molecular weight of 350-500. The agent has improved elution control, resulting in improved long-term activity. |