Processes for preparing conductive macromolecular...

Details Processes for preparing conductive macromolecular... Processes for preparing conductive macromolecular...

2006-04-25

2006-04-25

Truong, Duc (Department: 1711)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C528S373000, C528S377000, C528S378000, C528S397000, C528S485000

Reexamination Certificate

active

07034104

ABSTRACT:
The present invention relates to a process for preparing polythiophenes comprised of unit structures of the general formula 1:where R1and R2independently represent hydrogen or a C1˜C4alkyl group, or together represent an optionally substituted C1˜C4alkylene group, preferably an optionally alkyl-substituted methylene group, an optionally C1˜C4alkyl- or phenyl-substituted 1,2-ethylene group, a 1,3-propylene group or a 1,2-cyclohexylene group. More specifically, the process according to the present invention is characterized by the fact that it is performed by cationic polymerization from 2,5-dihalothiophene in the presence of an acid catalyst, such as Lewis acid, protic acid, oxygen acid, or polymeric acid. The conductivity of the resulting polythiophene is 255 S/cm under optimal conditions.

REFERENCES:
patent: 4959430 (1990-09-01), Jonas et al.
patent: 4987042 (1991-01-01), Jonas et al.
Yamamoto et al, Neutral poly93,4-ethylenedioxythiophene-2,5-diyl)s: preparation by organometallic polycondensation and their unique p-doping behavior, 2001, Elsevier Science Ltd., Chem Abstract 136:200547.
Tran-van et al, Fully undoped and soluble oligo(3,4-ethylenedioxythiophene)s: spectroscopic study and electrochemical characterization, 2001, Royal Society of Chemistry, Chem Abstract 135:107664.

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