Patent ID: 8389668

Claim:
A catalytic system comprising: (a) a styrene and divinylbenzene-based macroreticular resin with sulphonic acid that functions as a strongly acidic ion-exchange resin polymeric catalyst; (b) a (co)oligomerization additive of general formula (2) H—O—R 2 (2) R 2 represents a hydrogen atom or a group of formula -E 14 (R 14 )(R′ 14 )(R″ 14 ); wherein E 14 is a carbon atom; R 14 , R′ 14 and R″ 14 represent, independently, a hydrogen atom, or a substituted or non-substituted alkyl radical; wherein said substituent or substituents comprise alkyls, carboxys, and alkoxycarbonyls, or mixtures thereof; and (c) lactide and/or glycolide monomers; wherein the quantity of monomer relative to the quantity of (co)oligomerization additive ranges from 4 to 10 molar equivalents and the conversion of monomer is greater than 95%.