As a first step, we established a functionalization procedure that fulfils green chemistry principles to convert bio-based lactate esters into printable monomers. To this aim, three lactate esters (methyl, ethyl, butyl) were functionalized with methacrylate groups using a reusable catalyst (Figure ). Special attention was paid to the reaction conditions: the use of organic solvents was avoided and choosing chemicals with low toxicity, high yields and a high atom economy, were a main priority.