Polypropylene solution polymerization process

Details Polypropylene solution polymerization process Polypropylene solution polymerization process

2007-04-24

2011-11-15

Lee, Rip A. (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S351000, C526S348000, C526S161000, C526S068000, C526S070000

Reexamination Certificate

active

08058373

ABSTRACT:
A process for polymerization of propylene, optionally ethylene, and further optionally one or more C4-30α-olefins and/or one or more conjugated or nonconjugated dienes under continuous, solution polymerization conditions to prepare a high molecular weight polymer or interpolymer, said process comprising conducting the polymerization in the presence of a catalyst composition comprising a hafnium complex of a polyvalent aryloxyether.

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International Search Report (PCT/US2007/009841).

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