The invention relates to a method for manufacturing poly
lactide , comprising the steps of mixing lactide and a metal
coordination compound as polymerization catalyst to obtain
a reaction mixture , polymerizing the lactide in liquid phase at a temperature of at least 150° C . to form polylactide in
liquid phase and allowing the polylactide to solidify , char
acterized in that the polymerization catalyst comprises a
metal - ligand coordination compound whereby the parent ligand answers the formula ( I ) , whereby R represents an H
atom , an aliphatic group , a halide atom or a nitro group and
the metal is at least one of Zr and Hf . The invented catalysts show kinetics which is comparable to the kinetics of the
known Sn - octoate catalyst
Original languageEnglish
Patent number US 9 , 957 , 350 B2
Filing date29/04/14
Publication statusPublished - 1 May 2018

Cite this

Gobius Du Sart, G., Davidson, M., & Chuck, C. (2018). Method to manufacture PLA using a new polymerization catalyst. (Patent No. US 9 , 957 , 350 B2).