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US 2007/0191523 A1Published application
Decolorization of oligomers
AssigneeE. I. Du Pont de Nemours and Company
InventorsBradford Wayland, Zhi Lu, Alexei Gridnev, Thomas Darling
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Abstract
Methods of producing decolorized homo- and co-polymers through polymerization of monomers in presence of cobalt-complexed tetraphenyl porphyrin derivatives and decolorization of the produced polymer by exposing the polymer to a sorbent and, optionally, a solvent are disclosed herein.
Claims15
A method of producing decolorized homo- and co-polymers comprising:
- (a) polymerizing at least one monomer in the presence of a cobalt-complexed tetraphenyl porphyrin derivative;
- and
- (b) decolorizing the polymer produced by step (a) by exposing the polymer to a sorbent and, optionally, a solvent.
Dependencies are inferred from the claim text.