Novel hindered alkyl aluminum amide cocatalysts

Details Novel hindered alkyl aluminum amide cocatalysts Novel hindered alkyl aluminum amide cocatalysts

1979-03-07

1980-09-23

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252429C, 252 43N, 526139, 526140, 526141, 526142, 526163, C08F 464

Patent

active

042241820

ABSTRACT:
A new catalyst system for alphaolefin type polymerizations, includes at least one hindered alkyl metal amide compound having the formula R'.sub.2 YNR.sub.2 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.4 to C.sub.20 bulky alkyl, cycloalkyl, aralkyl, aryl and substituted aryl groups or R.sub.2 N is a hindered cyclic amide group; R' is selected from the group consisting of C.sub.1 to C.sub.20 primary alkyl, secondary alkyl, tertiary alkyl, neopentyl alkyl, branched alkyl, cycloalkyl or aralkyl groups, and Y is selected from the group consisting of aluminum, gallium or indium. The catalyst system provides polymers having increased isotactic stereoregularity as well as lower catalyst residue.

REFERENCES:
patent: 3489736 (1970-01-01), Takahashi et al.
patent: 3723348 (1973-03-01), Apotheker et al.
patent: 4094818 (1978-06-01), Langer

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