Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1997-12-18
2000-01-18
Bell, Mark L.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502111, 502117, 502125, 175179, 175182, B01J 3100, B01J 3700, C08F 402, C08F 460
Patent
active
060157666
ABSTRACT:
The invention relates to catalyst compositions for olefin polymerization comprising metallocene complexes and novel cocatalysts belonging to the group of oligoalkylaluminates with sterically hindered alkyl groups, such as a triphenylmethyl group. These cocatalysts are produced by two alternative synthetic methods, either by reacting methylalumoxane with a sterically hindered carbinol such as triphenyl carbinol; or in two-step processes comprising first reacting trimethylaluminum with said carbinol and then reacting the products of the first step with water. Catalyst systems containing these cocatalysts and metallocene complexes are active in polymerization and copolymerization reactions of ethylene and alpha-olefins.
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Bell Mark L.
Cuomo Lori F.
Mobil Oil Corporation
Pasterczyk J.
Santini Dennis P.
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