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Friday, 20 September 2019
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Raw materials & technologies, Raw materials, Coatings binders

Novel coatings from renewable resources protect bronzes

Friday, 4 July 2014

Coatings from renewable resources for the protection of metals were prepared.

Protective coatings based on renewable materials for bronze surfaces were developed Source: FikMik - Fotolia.com

Protective coatings based on renewable materials for bronze surfaces were developed Source: FikMik - Fotolia.com

End-capped poly(lactic acid)s with a benzotriazole moiety were synthesised by Ring Opening Polymerisation of lactide, characterised by spectroscopic methods and tested as protective coatings on selected bronze surfaces.

End-capped polymers are promising coatings

Performances of functionalised polymers were evaluated in terms of colour changes of the treated metal and stability of the coating. A comparison between end-capped polymers and a mixture of poly(lactic acid) and benzotriazole was also run. End-capped poly(lactic acid)s showed excellent stability to photochemical and thermo-hygrometric ageing and better performances than a blend of poly(lactic acid) and benzotriazole. These polymers show promising performances for metal's coating.

The study is published in: Progress in Organic Coatings, Volume 77, Issue 4, April 2014, Pages 892-903.

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