Catalyst composition and polymerization process using...

Details Catalyst composition and polymerization process using... Catalyst composition and polymerization process using...

2006-11-28

2006-11-28

Choi, Ling-Sui (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S124100, C526S124200, C526S124300, C526S348000, C526S351000, C526S352000, C526S901000, C502S103000, C502S125000, C502S104000, C502S133000

Reexamination Certificate

active

07141635

ABSTRACT:
A catalyst composition for the polymerization of olefins and process for the use thereof, comprising the combination of one or more Ziegler-Natta catalysts, comprising one or more transition metal compounds, one or more aluminum containing cocatalyts, and a mixture of different selectivity control agents, including in said mixture of selectivity control agents at least one normally dominating selectivity control agent and one normally dominated selectivity control agent, characterized in that the individual selectivity control agents are present in the mixture in relative amounts to each other and relative to the one or more transition metal compounds, such that the effect of the selectivity control agents on the resulting polymer properties is not determined solely or substantially solely by the normally dominating selectivity control agent.

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