Polymerization process for producing polydienes

Details Polymerization process for producing polydienes Polymerization process for producing polydienes

2008-05-01

2009-08-11

Teskin, Fred M (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S153000, C526S164000, C526S919000

Reexamination Certificate

active

07572867

ABSTRACT:
There is disclosed a process for producing a conjugated diene-containing polymer wherein a stream comprising conjugated diene monomer and a specified catalyst, that includes a lanthanide compound and an aluminoxane, is passed through an orifice into the reaction zone of a polymerization vessel, maintained under specific pressure conditions to form a cement having a viscosity that allows the cement to be conveyed through a devolatilization zone, where desired.

REFERENCES:
patent: 5567784 (1996-10-01), Wieder et al.
patent: 7078466 (2006-07-01), Balducci et al.
patent: 2007/0149717 (2007-06-01), Luo et al.

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