Aqueous dispersion of intrinsically electroconductive polyalkoxythiophenes, a process for their preparation and their use
AssigneeHoechst Aktiengesellschaft
InventorsKarl-Heinz Kochem, Michael Schmidt
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Abstract
An aqueous dispersion is described which contains electroconductive, doped, polyalkoxythiophene which is soluble in aprotic organic solvents and is insoluble in water. The dispersion has a residual solvent content of less than or equal to 25% by weight, based on the total weight of the dispersion. A process for the preparation of this dispersion and the use of the dispersion for forming coatings on substrates are also described.
Claims19
A process for making a coated article comprising the steps of applying to a substrate an aqueous dispersion comprising electroconductive, polyalkoxythiophene which is soluble in aprotic organic solvents, said dispersion having a residual organic solvent content of from at least about 5% by weight to less than or equal to 25% by weight, based on the total weight of the dispersion.
A process for making a coated article, comprising a bag with heat-sealed edges, comprising the steps
- (a) applying to one side of a film an aqueous dispersion comprising electroconductive, polyalkoxythiophene which is soluble in aprotic organic solvents, said dispersion having a residual organic solvent content of from at least about 5% by weight to less than or equal to 25% by weight, based on the total weight of the dispersion, to produce a coated film;
- (b) laminating the uncoated side of said coated film with a heat-sealable film to produce a coated laminated film;
- (c) forming a bag by folding;
- and
- (d) heat-sealing said bag with the coated side on the outside of the bag.
A process for making a coated article comprising a bag with heat-sealed edges, comprising the steps of:
- (a) applying to a first side of a film, containing a functional layer on the second side, an aqueous dispersion comprising electroconductive, polyalkoxythiophene which is soluble in aprotic organic solvents, said dispersion having a residual organic solvent content of from at least about 5% by weight to less than or equal to 25% by weight, based on the total weight of the dispersion, to produce a coated film;
- (b) laminating the second side of said coated film with a heat-sealable film to produce a coated laminated film;
- (c) forming a bag by folding;
- and
- (d) heat-sealing said bag with the coated side on the outside of said bag.
Dependencies are inferred from the claim text.