Polymerization catalyst for polymerization of Lactide monomers are either a solvent, or a co-catalyst or an elaborate ligand or non-environment friendly conditions.
All these factors are responsible for making the polymerization reaction process laborious, expensive and complicate.
Further in some cases the catalyst used is highly toxic thereby making the resulting polymer incompatible for bio medial application.
So a novel polymerization catalyst which is devoid of the above said draw back is the urgent need in the state of art.
Technology
The present patent discloses synthesis of group 4 metal aryloxy compounds as bulk polymerization catalysts for lactide polymerization having a general molecular formula (M)(OC6Rs)n(OH-R’)m.
The Group 4 metal (Ti, Zr Hf) aryloxy compounds are synthesized from Ti(O-iPr)4, Zr(O-iPr)4(HO-iPr) or Hf(O-tBu)4 and several phenols having different substituents on the phenyl ring, 1:4 stoichiometric ratio in toluene, employing the alcoholysis route.
The synthesized aryloxy compounds have been characterized thoroughly by 1H and 13C NMR spectroscopy, electrospray ionization mass spectrometry (ESI-MS) and their purity has been assured by correct elemental analysis values.