公开(公告)号：US4981929A

公开(公告)日：1991-01-01

申请号：US877501

申请日：1986-06-23

申请人： Fathi D. Hussein ,  David M. Gaines ,  Han T. Liu ,  Douglas J. Miller

发明人： Fathi D. Hussein ,  David M. Gaines ,  Han T. Liu ,  Douglas J. Miller

IPC分类号： C08F2/34 ,  C08F4/60 ,  C08F4/64 ,  C08F10/00

CPC分类号： C08F10/00 ,  Y10S526/901

摘要： Highly stereospecific olefin polymers are obtained in enhanced yield in a continuous gas-phase fluid bed process for polymerizing alpha monoolefins employing a catalyst system comprising (a) a solid titanium-containing procatalyst, (b) an organoaluminum activator compound, and (c) a selectivity control agent, by continuously adding dialkylaluminum halide to the reactor during polymerization and conducting polymerization at a temperature of 0.1.degree. to 5.0.degree. C. above the dew point temperature of the cycle gas in the reactor.

摘要翻译： 在连续气相流化床方法中获得高立体特异性烯烃聚合物，其使用催化剂体系聚合α单烯烃，所述催化剂体系包含（a）固体含钛前催化剂，（b）有机铝活化剂化合物和（c） 选择性控制剂，通过在聚合反应器中连续加入二烷基卤化铝，并在反应器中循环气体的露点温度0.1℃至5.0℃的温度下进行聚合。

公开(公告)号：US5093415A

公开(公告)日：1992-03-03

申请号：US51853

申请日：1987-05-19

申请人： Robert C. Brady, III ,  Francis G. Stakem ,  Han T. Liu ,  Allen Noshay

发明人： Robert C. Brady, III ,  Francis G. Stakem ,  Han T. Liu ,  Allen Noshay

IPC分类号： C08F4/649 ,  C08F2/34 ,  C08F4/60 ,  C08F4/64 ,  C08F4/654 ,  C08F10/00 ,  C08F10/06

CPC分类号： C08F10/00 ,  Y10S526/901

摘要： Stereoregular polymers having a molecular weight distribution of less than 5.0 and an isotactic index in excess of 96 percent are produced by polymerizing an alpha-olefin having 3 to 8 carbon atoms in a low pressure gas phase fluid bed process at a temperature in excess of 80.degree. C. employing a heat stable catalyst system comprising (a) a solid catalyst component containing magnesium, titanium, halide and a polycarboxylic acid ester containing two coplanar ester groups attached to adjacent carbon atoms, as inside electron donor, (b) an organoaluminum cocatalyst, and (c) a silicon compound containing a silicon-oxygen-carbon linkage, as outside electron donor.