The invention relates to a process for preparing polyhydroxyalkanoates by polymerization of lactones of the general formula I,
where the substituents and the index n have the meanings given in the description, in the presence of at least one catalyst of the formula (II) L
I
M
a
X
a
m
, where the substituents and indices have the meanings given in the description. The invention further relates to poly-3-hydroxybutyrates which have a novel property profile and are obtainable for the first time by means of this process, and also biodegradable polyester mixtures based on these poly-3-hydroxybutyrates.
本发明涉及一种通过在至少一种催化剂的存在下,聚合通式I的内酯制备聚羟基烷酸酯的方法,其中通式I的取代基和指数n的含义在说明中给出,催化剂的通式为(II) LIMaXam,其中取代基和指数的含义在说明中给出。本发明还涉及具有新的性质特征的聚-3-羟基
丁酸酯,首次通过该方法获得,并且基于这些聚-3-羟基
丁酸酯的可
生物降解聚酯混合物。