LACTIDE COPOLYMER, METHOD FOR PREPARING SAME, AND RESIN COMPOSITION COMPRISING SAME

摘要

The present invention relates to a lactide copolymer which has superior physical properties such as mechanical properties and workability, and superior flexibility, and thus can be valuably used as a packaging material or the like. The present invention also relates to a method for preparing the lactide copolymer and to a resin composition comprising the lactide copolymer. The lactide copolymer comprises two or more predetermined block copolymerizing repeating units in which hard segments of polylactide repeating units bond to both ends of soft segments of polyether polyol repeating units. The block copolymerizing repeating units are interconnected by means of a urethane linker group which is derived from a polyvalent isocyanate compound in which an equivalent of an average isocyanate group per molecule is between 2 and 3.