Ziegler-Natta catalyst for tuning MWD of polyolefin, method...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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C526S124100, C526S123100, C526S124200, C526S124300, C526S158000, C502S103000, C502S115000, C502S116000, C502S134000, C502S132000

Reexamination Certificate



A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation that includes treating a magnesium dialkoxide compound with halogenating/titanating agents, an organoaluminum preactivating agent, and a heat treatment. The catalyst may be used in the polymerization of olefins, particularly ethylene, to control the molecular weight distribution of the resulting polyolefins.

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