Removing impurities from polythiophene

Details Removing impurities from polythiophene Removing impurities from polythiophene

2008-01-22

2008-01-22

Truong, Duc (Department: 1711)

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

Synthetic resins

From sulfur-containing reactant

C528S373000, C528S491000, C528S499000, C528S50200C

Reexamination Certificate

active

07321021

ABSTRACT:
Impurities are removed from polythiophene by mixing a composition comprising polythiophene, water and an organic liquid at a temperature at which the organic liquid dissolves the polythiophene; allowing an aqueous phase to separate from an organic phase and recovering organic phase; adding water to recovered organic phase and mixing the resulting composition at a temperature at which the organic liquid dissolves the polythiophene; allowing an aqueous phase to separate from an organic phase and recovering organic phase; and allowing polythiophene solid to precipitate from recovered organic phase.

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