Process for preparing a polyester

摘要

Disclosed is a process for preparing a polyester or copolymer containing ester functionalities. The process can comprise:
providing an optionally substituted lactone having a ring size of from 6 to 40 carbon atoms; andsubjecting said lactone to metal mediated ring-opening polymerization using as catalyst a compound according to general formula (I):;
wherein
M can be Al, Cr, Mn and Co;X and X′ are independently a heteroatom;Y and Y′ can be, independently, selected from O, N, S, P, C, Si, and B;Z can be selected from hydrogen, borohydrides, aluminum hydrides, carbyls, silyls, hydroxide, alkoxides, aryloxides, carboxylates, carbonates, carbamates, amidos, thiolates, phosphides, and halides;L1 and L2 can be independently an organic ligand linking X and Y together and linking X′ and Y′ together, respectively; andL3 is an optional organic ligand linking Y and Y′ together.

主权项

1. A process for preparing a polyester, comprising
providing an optionally substituted lactone having a ring size of from 9 to 40 carbon atoms; and subjecting said lactone to metal mediated ring-opening polymerization using as catalyst a compound according to general formula (I): wherein
M is selected from the group consisting of Al, Ti, V, Cr, Mn and Co;X and X′ are independently a heteroatom,Y and Y′ are independently selected from the group consisting of O, N, S, P, C, Si, and B,Z is selected from the group consisting of hydrogen, borohydrides, aluminum hydrides, carbyls, silyls, hydroxide, alkoxides, aryloxides, carboxylates, carbonates, carbamates, amidos, thiolates, phosphides, and halides;L1 and L2 are independently an organic ligand linking X and Y together and linking X′ and Y′ together, respectively, andL3 is an optional organic ligand linking Y and Y′ together.