Patent ID: 8563679
Filing Date: 2013-10-22
Classification: C07C,C08G

Abstract:
1. A method for ring-opening (co)polymerization of lactone(s) comprising copolymerization in the presence of a non-metallic catalytic system comprising a sulphonamide and a base, wherein said sulphonamide is a monosulphonamide of formula (I): in racemic, or enantiomeric form or any combination thereof, wherein R1 and R2 represent independently an alkyl, halo alkyl, phenyl, haloalkyl radical, or aryl radical, wherein said aryl radical is optionally substituted or wherein the sulphonamide is a bisulphonamide of formula (IIa) or (IIb) in racemic, or enantiomeric form or any combination thereof, wherein R1 and R2 represent an alkyl, haloalkyl or aryl radical, wherein said aryl radical is optionally substituted; R′1 and R′2 represent an arylene, alkylene or cycloalkylene radical, wherein said radicals being optionally substituted; and R3 and R4 represent independently a hydrogen atom, methyl radical, or an alkyl radical.