Miscible forms of electrically conductive polyaniline
AssigneeGumbs Associates, Inc.
InventorChenChang Chen
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Abstract
This invention relates to compositions of miscible electrically conductive polyaniline and to conductive articles formed from such compositions. Specifically, the invention relates to polyaniline dioctylsulfosuccinate which is miscible with some common organic solvents. UV-Visible spectra of dilute solutions of this polymer show a linear dependence of absorbance on concentration. Solution with high concentrations of polymer, >50 w %, can be prepared and uniform films can be cast from these solutions without any loss in electrical conductivity. The solutions and films are stable.
Claims18
Process for the preparation of polyanilinedioctyl sulfosuccinate (PaniDos) which comprises the sequential steps of
- a) preparing a solution of aniline in excess of an aqueous solution of a strong acid to form an aqueous solution of the corresponding aniline (strong acid) addition salt,
- b) adding to said solution, a solution of a strong oxidizing agent in the same aqueous acid,
- c) adding to the mixture produced by steps a) and b) an aqueous solution of dioctyl sulfosuccinate salt whereby PaniDos is precipitated.
Process for the preparation of polyanilinedioctyl sulfosuccinate (PaniDos) which comprises the sequential steps of
- a) preparing a solution of aniline in excess of an aqueous solution of hydrochloric acid containing about 4 equivalents of said acid per mole of aniline charged to form an aqueous solution of the corresponding Pani(hydrochloric acid) addition salt,
- b) adding to said solution, at a temperature of between -5.degree. and +5.degree. C., a solution of a sodium persulfate in the same aqueous acid, allowing the mixture to warm to ambient temperature, again cooling the mixture to the previous temperature range and
- c) adding to the mixture produced by steps a) and b) similarly cooled aqueous solution of dioctyl sulfosuccinate salt permitting the reaction to proceed for a predetermined time and permitting it to warm to ambient temperature whereby PaniDos is precipitated.
Dependencies are inferred from the claim text.