Preparation and use of tetrasubstituted fluorenyl catalysts for polymerization of olefins
申请人:Fina Technology, Inc.
公开号:US08093418B2
公开(公告)日:2012-01-10
Catalyst compositions and processes for the polymerization of ethylenically unsaturated monomers to produce polymers, including copolymers or homopolymers. Such monomers include ethylene, C3+ alpha olefins and substituted vinyl compounds, such as styrene and vinyl chloride. The polymerization catalyst characterized by the formula B(FluL)MQn in which Flu is a fluorenyl group substituted at at least the 2,7- and 3,6-positions by hydrocarbyl groups, preferably relatively bulky hydrocarbyl groups. L is a substituted or unsubstituted cyclopentadienyl, indenyl or fluorenyl group or a heteroorgano group, XR, in which X is a heteroatom from Group 15 or 16 of the Periodic Table of Elements, such as nitrogen, R is an alkyl group, a cycloalkyl group or an aryl group and B is a structural bridge extending between the groups L and Flu, which imparts stereorigidity to the ligand structure, M is a Group 4 or Group 5 transition metal, such as titanium, zirconium or hafnium and Q is selected from the group consisting of chlorine, bromine, iodine, an alkyl group, an amino group, an aromatic group and mixtures thereof, with n being 1 or 2.
催化剂组成和过程用于聚合具有乙烯基不饱和单体以生产聚合物,包括共聚物或均聚物。这些单体包括乙烯,C3+α烯烃和取代的乙烯基化合物,如苯乙烯和氯乙烯。聚合催化剂的特征公式为B(FluL)MQn,其中Flu是在至少2,7-和3,6-位置上被碳氢基取代的芴基团,优选是相对较大的碳氢基团。L是取代或未取代的环戊二烯基,茚基或芴基团或杂原子组XR,其中X是元素周期表第15或16组的杂原子,例如氮,R是烷基,环烷基或芳基,B是在L和Flu之间延伸的结构桥,使配体结构具有立体构效,M是第4或第5组过渡金属,例如钛,锆或铪,Q从氯,溴,碘,烷基,氨基,芳基和其混合物中选择,其中n为1或2。