ARYLPHENOXY CATALYST SYSTEM FOR PRODUCING ETHYLENE HOMOPOLYMER OR COPOLYMERS OF ETHYLENE AND a-OLEFINS
申请人:Woo Tae Woo
公开号:US20090326175A1
公开(公告)日:2009-12-31
The present invention relates to an arylphenoxy catalyst system producing an ethylene homopolymer or copolymers of ethylene and α-olefins, and a method of producing an ethylene homopolymer or copolymers of ethylene and α-olefins having a high molecular weight under a high temperature solution polymerization condition using the same. The catalyst system includes a group IV arylphenoxy-based transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst. In the transition metal catalyst, a cyclopentadiene derivative and arylphenoxide as fixed ligands are located around the group IV transition metal, arylphenoxide is substituted with at least one aryl derivative and is located at the ortho position thereof, and the ligands are not crosslinked to each other. The catalyst includes an environmentally-friendly raw material, synthesis of the catalyst is economical, and thermal stability of the catalyst is excellent. It is useful for producing an ethylene homopolymer or copolymers of ethylene and α-olefins having various physical properties in commercial polymerization processes.
本发明涉及一种芳基苯氧基催化剂体系,用于生产乙烯均聚物或乙烯与α-烯烃的共聚物,并且提供了一种在高温溶液聚合条件下生产具有高分子量的乙烯均聚物或乙烯与α-烯烃共聚物的方法。该催化剂体系包括一种基于IV族过渡金属的芳基苯氧基催化剂和一种铝氧烷共催化剂或硼化合物共催化剂。在过渡金属催化剂中,环戊二烯衍生物和芳基酚氧化物作为固定配体位于IV族过渡金属周围,芳基酚氧化物被至少一个芳基衍生物取代,并位于其邻位,配体之间不交联。该催化剂包含一种环保的原材料,催化剂的合成经济,催化剂的热稳定性优异。在商业聚合过程中,对生产具有各种物理性质的乙烯均聚物或乙烯与α-烯烃共聚物非常有用。