Patent ID: 6066703
Filing Date: 2000-05-23
Classification: C08F,Y10S

Abstract:
A process for the polymerization of an olefin, which comprises contacting at least one olefin monomer under polymerization conditions with a catalyst composition comprising the reaction product of:a) monocycloalkadienyl catalyst precursor having the formula:LMX.sub.xwherein:M is a metal selected from the group consisting of Ti, Zr and Hf:L is a cycloalkadienyl ligand selected from the group consisting of cyclopentadienyl, indenyl and fluorenyl optionally substituted with one or more hydrocarbyl groups containing 1 to 20 carbon atoms;each X is independently hydrogen, an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having 1-20 carbon atoms, a hydrocarboxy radical having 1-20 carbon atoms, a halide, a nitrogen containing radical having 1-20 carbon atoms, or Q.sub.2 YZ, wherein each Q is independently selected from the group consisting of --O--, --NR--, --CR.sub.2 -- and --S--; Y is either C or S; and Z is selected from the group consisting of --OR--, --NR.sub.2, --CR.sub.3, --SR, --SiR.sub.3, --PR.sub.2, --H, and aryl groups, with the proviso that when Q is --NR-- then Z is selected from the group consisting of --OR, --NR.sub.2, --SR, --SiR.sub.3, --PR.sub.2 and --H; andx is 2, 3, or 4 depending upon the valence state of M;b) an activity enhancing cycloalkadiene; andc) an activating cocatalyst.