Patent ID: 8507614

Claim:
An absorbable, multiphasic, crystalline, solid blend composition comprising at least 45 percent by weight of a major component comprising a segmented l-lactide copolymer, at least one minor component comprising at least one additional crystalline thermoplastic absorbable polyester having glycolide-based sequences, a fraction of the glycolide sequences interchanged with a fraction of the lactide sequences of the major component, the overall composition exhibiting at least two first order thermal transitions with a peak temperature difference exceeding 10° C., the overall composition having a crystallinity of at least 10 percent of the crystallinity of the major component as measured in terms of heat of fusion (ΔH f ), wherein the crystallinity decreases as the number of interchanged glycolide and lactide sequences increases; and wherein the composition is formed through a melt blending process that includes a controlled ester-ester interchange reaction.