The new metallocene catalysts according to the present invention are prepared by reacting a metallocene compound with a compound having at least two functional groups. The metallocene compound is a transition metal compound which a transition metal is coordinated with a main ligand such as cycloalkanedienyl group and an ancillary ligand. The functional groups of the compound having at least two functional groups are selected from the group consisting of a hydroxy group, a thiol group, a primary amine group, a secondary amine group, etc. The metallocene catalysts according to the present invention have a structure which an ancillary ligand of a metallocene compound is bonded with functional groups. A structure of the metallocene catalysts can be varied according to the metallocene compounds, the compound having at least two functional groups, and the molar ratio of each reactant. The metallocene catalyst is employed with a co-catalyst for styrene and olefin polymerization. The co-catalyst is an organometallic compound and a mixture of non-coordinated Lewis acid and alkylaluminium. The organometallic compound is usually alkylaluminoxane and organoaluminium compound. The syndiotactic polystyrenes and the polyolefins having good physical properties are prepared by using the metallocene catalyst according to the present invention. A monomer for polymerization includes styrene, derivatives of styrene, and a compound having ethylenically unsaturated double bonds Those compounds are homopolymerized and copolymerized to give polystyrene and polyolefin.
本发明的新型茂
金属催化剂是通过茂
金属化合物与至少具有两个官能团的化合物反应制备的。茂
金属化合物是过渡
金属与主
配体(如环烷二烯基)和辅助
配体配位的过渡
金属化合物。具有至少两个官能团的化合物的官能团选自羟基、
硫醇基、
伯胺基、仲胺基等组成的组。根据本发明的茂
金属催化剂具有茂
金属化合物的辅助
配体与官能团键合的结构。茂
金属催化剂的结构可根据茂
金属化合物、具有至少两个官能团的化合物以及各反应物的摩尔比而变化。茂
金属催化剂与助催化剂一起用于
苯乙烯和烯烃聚合。助催化剂是一种有机
金属化合物和非配位
路易斯酸与烷基铝的混合物。有机
金属化合物通常是烷基铝氧烷和
有机铝化合物。使用本发明的茂
金属催化剂可制备具有良好物理性能的辛二聚
苯乙烯和聚烯烃。用于聚合的单体包括
苯乙烯、
苯乙烯的衍
生物和具有
乙烯不饱和双键的化合物,这些化合物通过均聚和共聚得到聚
苯乙烯和聚烯烃。