Trialkyl aluminum cocatalyst

Details Trialkyl aluminum cocatalyst Trialkyl aluminum cocatalyst

C - Chemistry, Metallurgy

08

F

252/105

C08F 4/64 (2006.01) C08F 4/76 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1142908

U.S. 18,339 ABSTRACT OF THE DISCLOSURE A new improved catalyst system for alpha-olefin type polymerizations, includes at least one metal alkyl compound having the formula RnMR'3-n in combination with a Group IVB-VIII transition metal compound on a support and at least one Lewis base wherein R is selected from the group consisting of C3 to C20 secondary or tertiary alkyl, cycloalkyl, alkenyl or aralkyl groups; R' is selected from the group consisting of C1 to C20 primary alkyl, alkenyl or aralkyl groups, or a hydride, M is selected from the group consisting of aluminum, gallium, or indium; and n = 0-3. The improved catalyst system provides polymers having increased isotactic stereoregularity as well as lower catalyst residue.

346420

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