Yttrium-based ethylene polymerization catalysts with bulky...

Details Yttrium-based ethylene polymerization catalysts with bulky... Yttrium-based ethylene polymerization catalysts with bulky...

2005-05-10

2005-05-10

Wu, David W. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S172000, C526S160000, C526S170000, C502S104000, C502S103000

Reexamination Certificate

active

06891006

ABSTRACT:
A cationic Group 3 or Lanthanide metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by an anionic amidinate ancillary ligand. Upon reaction with an activator, the complex becomes an active olefin-polymerization catalyst. Some invention processes give narrow polymer polydispersities.

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