Antifouling Polymers: Room-Temperature-Curing Organotin Polymers
We have reported extensively on antifouling formulations in which tributyltin carboxylate groups are chemically anchored to the polymer chain.1–3 In these controlled-release formulations, the prepolymers were prepared by partial esterification by bis(tri-n-butyltin) oxide (TBTO) of linear polymers carrying carboxylic acid or anhydride groups. The free carboxylic acid or anhydride groups were than reacted with diepoxides to form thermoset organotin-epoxy polymers. Many variations of this scheme were investigated, including one which provided for simultaneous vinyl polymerization and carboxyl-epoxide reactions. Curing was accomplished at high temperatures (about 150°C) in all these reactions.
KeywordsUnsaturated Polyester Epoxy System Anhydride Group Methyl Ethyl Ketone Peroxide Free Carboxylic Acid
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