Process for Preparing Electroconductive Coatings

摘要

An aqueous dispersion of latex particles, said latex particles containing a polymer containing monomer units according to formula (I): in which R¹ and R² independently of one another represent hydrogen or a C_1-5-alkyl group or together form an optionally substituted C_1-5-alkylene residue and at least one polyanion compound, said latex having a primary particle size of less than 40 nm and said dispersion contains an organic compound containing a di- or polyhydroxy- and/or carboxy groups or amide or lactam group or an aprotic compound with a dielectric constant, epsilon, >=15, wherein said latex particles contain said at least one polyanion compound and said polymer in a weight ratio of at least 4; a process for preparing an electroconductive coating comprising the steps of: preparing an aqueous solution or dispersion of the above-mentioned polymer by polymerization with an initiator in a reaction medium in the presence of at least one polyanion compound under oxidizing or reducing conditions, wherein the weight ratio of the at least one polyanion compound to said structural units during the reaction is in the range of 4:1 to 20:1; preparing a first coating composition containing said polymer associated with said at least one polyanion compound and an organic compound containing a di- or polyhydroxy- and/or carboxy groups or amide or lactam group in a aqueous or non-aqueous medium; coating said first coating composition on an object thereby producing a first layer; and heating said first layer at a temperature of at least 100° C.; and a process for preparing an electroconductive coating comprising the steps of: preparing an aqueous solution or dispersion of the above-mentioned polymer by polymerization with an initiator in a reaction medium in the presence of at least one polyanion compound under oxidizing or reducing conditions, wherein the weight ratio of said at least one polyanion compound to said structural units during the reaction is in the range of 4:1 to 20:1; preparing a second coating composition containing said polymer associated with said at least one polyanion compound and an aprotic compound with a dielectric constant, epsilon, >=15 in an aqueous or non-aqueous medium; coating said second coating composition on an object thereby producing a second layer; and heating said second layer at a temperature of at least 50° C.