申请人:WACKER CHEMIE AG
公开号:US20170022320A1
公开(公告)日:2017-01-26
The present invention relates to a compound having the formula L
a
M(OR
1
)
b
R
2
c
X
d
wherein M is a metal selected from Ti, Zr and Hf; L is a ligand selected from permethylpentalene, (hydro)permethyl-pentalene, (hydro)pentalene, cyclopentadiene, indene and ethylene- or silane-bridged indene, preferably (bis)indene; R
1
is a 1-6C alkyl, substituted or unsubstituted phenyl, or a substituted or unsubstituted phenylalkylene group; R
2
is Me or Et; X is halogen; a=1 to 3, b=1 to 3, c=0 or 1 and d=0, 1, 2 or 3; and dimers thereof, the use of the compound as an initiator in the polymerisation of lactide monomer and a process for producing a polylactide performed by contacting a lactide monomer with the compound.
本发明涉及具有以下化学式LaM(OR1)bR2cXd的化合物,其中M是从Ti、Zr和Hf中选择的金属;L是从permethylpentalene、(氢)permethyl-pentalene、(氢)pentalene、环戊二烯、茚和乙烯-或硅烷桥联的茚中选择的配体,优选为(双)茚;R1是1-6碳的烷基,取代或未取代的苯基,或取代或未取代的苯基烷基基团;R2是Me或Et;X是卤素;a=1至3,b=1至3,c=0或1,d=0、1、2或3;以及它们的二聚体,该化合物作为乳酸内酯单体聚合的引发剂的用途以及通过将乳酸内酯单体与该化合物接触来生产聚乳酸的方法。