申请人:Borealis AG
公开号:EP2223944A1
公开(公告)日:2010-09-01
The present invention provides a process for producing propylene polymers having a crystallinity of at least 20 % where the process comprising contacting a monomer mixture comprising propylene with a catalyst comprising (A) a metallocene compound having the formula (I) below and (B) and activator for said metallocene,
QR2(lndR7-p)2MeX2 (I)
wherein Ind is a ligand having indenyl or tetrahydroindenyl structure, each R independently is an alkyl, aryl, alkylaryl, arylalkyl, alkylene, silyl, alkoxy or siloxy group having from 1 to 30 carbon atoms, Q is Si or C, Me is a transition metal of group 4 or 5, each X independently is a halogen, or an alkyl, aryl, alkylaryl, arylalkyl, alkylene, silyl, alkoxy or siloxy group having from 1 to 30 carbon atoms and p is an integer from 1 to 6, characterized in that Q is a bridging group connecting one of the carbons 1 to 3 of one ligand Ind to one of the carbons 4 to 7 of the other ligand Ind.
The process according to the present invention produces homo- and copolymers of propylene having a high melting temperature and a high molecular weight.
本发明提供了一种生产结晶度至少为 20%的丙烯聚合物的工艺,该工艺包括将丙烯单体混合物与催化剂接触,催化剂包括 (A) 具有下式 (I) 的茂金属化合物和 (B) 以及所述茂金属的活化剂、
QR2(lndR7-p)2MeX2 (I)
其中 Ind 是具有茚基或四氢茚基结构的配体,每个 R 独立地是具有 1 至 30 个碳原子的烷基、芳基、烷芳基、芳烷基、亚烷基、硅烷基、烷氧基或硅氧基,Q 是 Si 或 C,Me 是 4 或 5 族过渡金属,每个 X 独立地是卤素、或具有 1 至 30 个碳原子的烷基、芳基、烷芳基、芳烷基、亚烷基、硅烷基、烷氧基或硅氧基,p 为 1 至 6 的整数,其特征在于 Q 是连接一个配体 Ind 的碳 1 至 3 与另一个配体 Ind 的碳 4 至 7 的桥基。
根据本发明的工艺可以生产出具有高熔点和高分子量的丙烯均聚物和共聚物。