Síntese do Eval-g-norbixina: Aplicação como um Pigmento em Polímeros

The contamination by heavy metals present in polymer additives and pigments, is a serious health risks. Thus new methods have been implemented to the use of organic and biodegradable pigments. In this work, a technique was developed by grafting of norbixin in poly (ethylene-co-vinyl alcohol) for use as a pigment on polymer materials. From the results obtained by HPLC, it was observed that the alkaline extraction led the hydrolysis of bixin into norbixin. The analysis by FT-IR and DSC have identified the EVAL and the graft of norbixin. This technique showed to be an easy alternative, viable and attractive for the production of new pigments compared to traditionally used techniques described in the literature.