Preparation of self-acid-doped sulfonic acid ring-substituted po

Details Preparation of self-acid-doped sulfonic acid ring-substituted po Preparation of self-acid-doped sulfonic acid ring-substituted po

1997-01-22

1998-10-13

Truong, Duc

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

Synthetic resins

Nitrogen-containing reactant

528373, 528391, C08G 7300

Patent

active

058213449

ABSTRACT:
The present invention discloses a process for preparing an aqueous solution of self-acid-doped o-sulfonic acid ring-substituted polyaniline, which can be cast into free-standing films. The process involves dissolving a solid o-sulfonic acid ring-substituted polyaniline in an alkaline aqueous solution to form an aqueous solution of an undoped o-sulfonate ring-substituted polyaniline; purifying the aqueous solution of the undoped o-sulfonate ring-substituted polyaniline by subjecting it to a purifying treatment to remove excess alkali therefrom; and contacting the resulting purified aqueous solution with a H.sup.+ -type ion-exchange resin to form an aqueous solution containing a self-acid-doped o-sulfonic acid ring-substituted polyaniline. A suitable water soluble polymer or polymer emulsion can be easily mixed with the aqueous solution containing the self-acid-doped o-sulfonic acid ring-substituted polyaniline to form a polymer blend.

REFERENCES:
patent: 5641859 (1997-06-01), Chen et al.
Show an Chen et al., "Structure Characterization of Self-Acid-Doped Sulfonic Acid Ring Substitutes Polyaniline in its Aqueous Form and as Solid Film", Macromolecules, 1996, vol. 29, No. 11, pp. 3950-3955.
Show an Chen et al. Synthesis of Water Soluble Self-Acid-Doped Polyaniline J. Am. Chem. Soc. 1994, 116, pp. 7939-7940.
Hany et al. "Polyanilines With Covalently Bonded Alcyl Selfonates as Doping Agent. Synthesis and Properties", Synthetic Metals, 31 (1989), 369-378.

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