Novel trialkyl aluminum cocatalyst

Details Novel trialkyl aluminum cocatalyst Novel trialkyl aluminum cocatalyst

1980-03-06

1981-12-08

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526139, 526140, 526141, 526142, C08F 464

Patent

active

043046843

ABSTRACT:
A new improved catalyst system for alpha-olefin type polymerizations, includes at least one metal alkyl compound having the formula R'"M in combination with a Group IVB-VIII transition metal compound on a support and at least one hindered Lewis base and one unhindered Lewis base and a Group IA-IIIA metal salt of a sterically hindered carboxylate, alkoxide or aryloxide, wherein R'" is selected from the group consisting of C.sub.1 to C.sub.20 primary alkyl, alkenyl or aralkyl groups, or a hydride, and M is selected from the group consisting of aluminum, gallium, or indium. The improved catalyst system provides polymers having increased isotactic stereoregularity as well as lower catalyst residue.

REFERENCES:
patent: 3663450 (1972-05-01), Cozewith et al.
patent: 4038471 (1977-07-01), Castner
patent: 4072809 (1978-02-01), Rogan
patent: 4158642 (1979-06-01), Langer

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