A 3,4-alkylenedioxythiophenedioxide compound represented by formula (I):
##STR1##
in which: A represents a C1-5-alkylene bridge; R represents an optionally
substituted C1-24-alkyl, C3-18-cycloalkyl, C1-18-alkoxy
or polyethylene oxide group (optionally with at least one substituent selected
from the group consisting of an alcohol, amide, ether, ester or sulphonate group)
or an optionally substituted aryl group; a polymer comprising monomeric units represented
by formula (I); an aqueous dispersion of a polymer comprising monomeric units corresponding
to at least one compound according to formula (I) and a polyanion; a chemical polymerization
process for preparing the aqueous dispersion comprising the steps of: (i) providing
a solution of a polyanion; (ii) adding a compound according to formula (I) and
a thiophene or pyrrole compound to the solution provided in step (i); and (iii)
adding an oxidizing or reducing system to the mixture provided in step (ii); a
printable paste containing the aqueous dispersion; an electroconductive layer containing
the polymer; the use of the electroconductive layer in a light emitting diode;
an antistatic layer containing the polymer; and an electroconductive pattern and
a process for preparing the electroconductive pattern.
