| 摘要 |
The current invention refers to a functionalization process for biocidal compounds with isocyanate reactive function, in order to provide them the ability to be further imobilized through covalent bonds in compatible polymeric matrices. This biocides' imobilization ability allows for its further application as an additive for the preparation of polymeric materials (e. g. : varnishes, paints, etc. ), conferring them antifouling properties by a contact mechanism, thus avoiding the use of conventional processes, which involve the leaching of toxic agents for the biofouling control. The claimed process is therefore an environmentally friendly alternative for biofouling prevention. It consists in the reaction between diisocyanate with biocidal compounds, whose molecular structure includes functional groups compatible with the isocyanate (e. g. : amines, hydroxyl). The modified biocides are then obtained by precipitation, followed by extraction through solvent evaporation under reduced pressure. Depending on the type of biocide used and purity, the optimized reaction conditions allow for the achievement of conversions as high as 95 ± 5%. |
