Patent ID: 7999061

Claim:
A method for (co)polymerizing lactide and/or glycolide monomers via a ring-opening (co)polymerization process comprising: contacting said lactide and/or glycolide monomers with a catalytic system comprising (a) a trifluoromethanesulfonate of the formula in which R 1 is hydrogen, deuterium atom, or -E 14 (R 14 )(R′ 14 )(R″ 14 ); E 14 is an element of group 14; R 14 , R′ 14 and R″ 14 are independently hydrogen, deuterium atom, substituted or non-substituted alkyl, cycloalkyl or aryl, and in which said substituent or substituents are halo, alkyl, cycloalkyl or aryl, as catalyst, and (b) a (co)polymerization additive of the formula R 2 -E-R 3 (2) in which E is an element of group 16; R 2 is a hydrogen or deuterium atom; R 3 is hydrogen, deuterium atom, or -E′ 14 (T 14 )(T′ 14 )(T″ 14 ); E′ 14 is an element of group 14; T 14 , T′ 14 and T″ 14 are, independently, hydrogen; deuterium atom; or substituted or non-substituted alkyl, cycloalkyl or aryl, wherein said substituent or substituents are halo, hydroxy, alkyl, alkoxy, cycloalkyl, cycloalkoxy, aryl, aryloxy, carboxy, alkoxycarbonyl, cycloalkoxycarbonyl or aryloxycarbonyl, thereby (co)polymerizing said lactide and/or glycolide monomers.