申请人:EXXON RESEARCH AND ENGINEERING COMPANY
公开号:EP0016581A1
公开(公告)日:1980-10-01
A catalyst system for alphaolefin type polymerizations, includes at least one hindered alkyl metal amide compound having the formula R'2YNR2 in combination with a Group IVA-VIII transition metal compound on a support and at least one Lewis base wherein R is C3 to C20 bulky alkyl, cycloalkyl, aralkyl, aryl or substituted aryl groups or R2N is a hindered cyclic amide group; R' is C, to C20 primary alkyl, secondary alkyl, tertiary alkyl, neopentyl alkyl, branched alkyl, cycloalkyl or aralkyl groups, and Y is aluminium, gallium or indium. The catalyst system provides polymers having increased isotactic stereoregularity as well as lower catalyst residue.
一种用于α-烯烃类聚合反应的催化剂体系,包括至少一种具有式 R'2YNR2 的受阻烷基金属酰胺化合物,该化合物与一种位于载体上的 IVA-VIII 族过渡金属化合物和至少一种路易斯碱结合,其中 R 是 C3 至 C20 粗大烷基、环烷基、芳基、芳基或取代芳基,或 R2N 是受阻环酰胺基团;R' 是 C 至 C20 级烷基、仲烷基、叔烷基、新戊基、支链烷基、环烷基或芳烷基,Y 是铝、镓或铟。该催化剂体系提供的聚合物具有更高的异构立体规整度和更低的催化剂残留量。