Branched lactic acid polymers with high viscosity in the molten state and high shear sensitivity, and nanocomposites thereof
AssigneesFondazione Cariplo, Universita' Degli Studio Di Milano
InventorsGiuseppe Di Silvestro, Cuiming Yuan, Marco Ortenzi, Tommaso Lugato, Luca Basilissi
Life of this patent
Estimating the term…
Abstract
Disclosed is a polymer obtainable by bulk polymerization of lactide or lactic acid or a lactic acid copolymer obtainable by copolymerization of lactide or lactic acid with glycolide, glycolic acid and/or hydroxyacids in open or closed (cyclic) form in the presence of at least two organic and/or organic/inorganic chain regulators or a functionalized nanoparticle (nanosilica, montmorillonite).
Claims13
A homopolymer obtainable by bulk polymerization of lactide monomers or lactic acid or a copolymer obtainable by copolymerization of lactide monomers or lactic acid with glycolide monomers, glycolic acid and/or hydroxyacids in open or closed (cyclic) form, said polymerization or copolymerization being performed in the presence of at least two chain regulators or in the presence of at least one functionalized nanoparticle, optionally in combination with one or more chain regulators, the percentage by weight of the homo- or copolymer being at least 80% in the material obtained during polymerization.
Dependencies are inferred from the claim text.