Novel Half Metallocene Catalysts and Method for Preparing Syndiotactic Polystyrenes

摘要

The present invention uses a co-catalyst in a small amount and high activity, superior stereoregularity, high melting temperature and a transition metal halves metal of the novel structure metallocene catalysts for the production of syndiotactic styrene polymer having a different molecular weight distribution and them using relates to a method of producing a styrene-based polymer, as the new metal according to the invention metallocene catalysts are cycloalkyl generating a 5 coordination bond to one side of the transition metal of the periodic table group 3 to group 10 alkane diethoxy group or a derivative thereof is coupled and, on the other side having a plurality of said binding site of the triethanolamine having a high steric hindrance based or N- alkyl diethanolamine based or N- dialkyl ethanol sensor structure in a single half of the nucleus of the amine-based compound introduced metal, only can be produced by the syndiotactic structure is active and the vinyl aromatic polymer as the predominant polymer of different molecular weight distribution by using this also can be prepared. ; Half metallocene catalyst, triethanolamine, N- alkyl diethanolamine, N- dialkyl ethanolamine, hindered, syndiotactic polystyrene, alkyl aluminum dioxane