An antifouling agent comprising as an antifouling component a substantially linear triorganotin-containing copolymer containing (a) at least one kind of N-coordinated triorganotin-containing recurring units of the formula (la) or (Ib) represented in the specification and (b) comonomer recurring units derived from at least one ethylenic vinyl compound as a comonomer.
The antifouling agent is applied to a structure which is needed to be protected from fouling organisms to form a film of the copolymer on the structure.
We developed a simple and efficient strategy to access N-vinyl secondary amines of various naturally occurring materials using readily available solid acetylene reagents (calcium carbide, KF, and KOH). Pyrrole, pyrazole, indoles, carbazoles, and diarylamines were successfully vinylated in good yields. Cross-linked and linear polymers were synthesized from N-vinyl carbazoles through free radical and