Intrinsically conductive polymer in the form of a dispersible solid, its manufacture and its use
AssigneeZipperling Kessler & Co. (GmbH & Co.)
InventorsBernhard Wessling, Harald Volk, Susanne Bl attner
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Abstract
An intrinsically conductive polymer is in the form of a dispersible solid of primary particles with a specific surface area according to BET of >15 m.sup.2 /g and with an average diameter of less than 500 nm, in which preferably not more than 20% of aggregates with an average size >1 .mu.m are present in the particle size range >500 nm. For the manufacture of the polymer the polymerization is carried out in a solvent in which the appropriate monomer is soluble or colloidally dispersible, but in which the polymer that is formed is insoluble, whereby the temperature of the reaction mixture is not allowed to rise more than 5.degree. C. above the starting temperature.
Claims19
Intrinsically conductive polyaniline powder in the form of a dispersible solid of primary particles having a specific surface area according to BET of >15 m.sup.2 /g and an average (weight) diameter of less than 500 nm.
Process for the preparation of the intrinsically conductive polyaniline powder in the form of a dispersible solid of primary particles having a specific surface area according to BET of >15 m.sup.2 /g and an average (weight) diameter of less than 500 nm, the process comprising the steps of:
- polymerizing an aniline monomer in a solvent, in which the monomer is present in solution and the polyaniline powder formed is insoluble in the solvent, and the temperature of the reaction mixture is controlled by cooling so that it will not rise to a value more than 5.degree. C. over the starting temperature.
Dependencies are inferred from the claim text.