Trialkyl aluminum cocatalyst

Details Trialkyl aluminum cocatalyst Trialkyl aluminum cocatalyst

1978-04-14

1979-06-19

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526124, 526139, 526141, 526142, 526125, C08F 446, C08F 450, C08F 452

Patent

active

041586425

ABSTRACT:
A new improved catalyst system for alpha-olefin type polymerizations, includes at least one metal alkyl compound having the formula R.sub.n MR'.sub.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 C.sub.3 to C.sub.20 secondary or tertiary alkyl, cycloalkyl, alkenyl or aralkyl groups; R' is selected from the group consisting of C.sub.1 to C.sub.20 primary alkyl, alkenyl or aralkyl groups, or a hydride, M is selected from the group consisting of aluminum, gallium, or indium; and n=1-3. The improved catalyst system provides polymers having increased isotactic stereoregularity as well as lower catalyst residue.

REFERENCES:
patent: 3888789 (1975-06-01), Dombro et al.
patent: 3953414 (1976-04-01), Galli et al.
patent: 3992322 (1976-11-01), Dombro et al.

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