Catalysts for catalytic chain transfer

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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C526S320000, C526S346000, C526S335000, C502S167000, C556S032000, C556S035000

Reexamination Certificate

active

08053541

ABSTRACT:
Cobaloxime derivatives and methods of producing cobaloxime derivatives are disclosed herein. Methods of producing decolorized homo- and co-polymers through polymerization of monomers in presence of the cobaloxime derivatives and decolorization of the produced polymer by exposing the polymer to a sorbent and, optionally, a solvent are also disclosed herein.

REFERENCES:
patent: 5726263 (1998-03-01), Gridnev
patent: 5750772 (1998-05-01), Gridnev
patent: 6858745 (2005-02-01), Gridnev et al.
Gridnev, A., and Ittel S.D.; Chem Rev. 101:3611-60 (2001); “Catalytic Chain Transfer in Free Radical Polymerization”.

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