Bulk polymerization process for producing polydienes

Details Bulk polymerization process for producing polydienes Bulk polymerization process for producing polydienes

2006-08-22

2006-08-22

Lu, Caixia (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S340400, C526S335000, C502S154000, C502S170000

Reexamination Certificate

active

07094849

ABSTRACT:
A method of producing cis-1,4-polydienes, the method comprising the step of contacting conjugated diene monomer with a lanthanide-based catalyst system in the presence of less than 20% by weight of organic solvent based on the total weight of monomer, organic solvent, and resulting polymer, where the lanthanide-based catalyst system is the combination of or reaction product of (a) a lanthanide compound, (b) an organoaluminum hydride, (c) a trihydrocarbylaluminum, and (d) a halogen-containing compound.

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