Method for bulk polymerization

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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C526S902000, C525S242000, C525S243000, C525S244000, C525S245000, C525S290000, C525S333200

Reexamination Certificate

active

07807763

ABSTRACT:
A method for polymerizing conjugated diene monomer into polydienes, the method comprising: polymerizing conjugated diene monomer within a liquid-phase polymerization mixture that includes conjugated diene monomer, a lanthanide-based catalyst system, dicyclopentadiene or substituted dicyclopentadiene, and optionally organic solvent, with the proviso that the organic solvent, if present, is less than about 20% by weight based on the total weight of the polymerization mixture.

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International Search Report of Application Serial No. PCT/US2009/039639.

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