Patent ID: 7785628

Claim:
Polymeric material comprising an amorphous poly(DL-lactide-co-ε-caprolactone) copolymer obtained by the copolymerization of DL-lactide and ε-caprolactone at a temperature in the range of from 100° C. to 130° C. during a period of time in the range of from 3 to 40 days, wherein said polymerization is carried out using a catalyst in an amount such that the molar ratio of lactide and ε-caprolactone monomers to said catalyst (M/I) is in the range of from 1000 to 100000, which copolymer has a polydispersity (Mw/Mn) of less than 1.8; has an intrinsic viscosity of more than 4 dl/g; has a lactide content of 62-69 mol %; wherein the fraction of the D-enantiomer or L-enantiomer of the lactide is from 65-95 mol %; and wherein the lactide sequence length is in the range of 5.5 to 9.2 and the ε-caprolactone sequence length is in the range of 1.9 to 2.5.