Process For Coating Fine Particles With Conductive Polymers

A process comprising coating particles, wherein said particles ar organic or inorganic, and wherein the particles are present in a mixture or are initially formed in this, wherein the educt mixture is at least one of a dispersion, a flowable a kneadable mass, a sol or a gel, wherein the educt mixture;, comprises:

• at least one of a monomer or at least one oligomer—in the following called “educt(s) of the conductive polymer” or merely “educt(s)”
• chosen from monomers or oligomer of aromatics or unsaturated hydrocarbon compounds which are suitable for formation of electrically conductive oligomer/ polymer/ copolymer/ block copolymer/ graft copolymer therefrom,
• at least one type of anion, optionally at least one salt, one ester or at least one acid as a carrier of these anions
• wherein this at least one type of anions in the conductive polymer can be incorporated or is incorporated into the structure of the conductive polymer as a doping ion, can also be released again from this structure in the event of a drop in potential of the conductive polymers (reduction) and if a metallic surface is present, can have a corrosion-protecting action—in the following called “mobile corrosion-protecting anions”,
• at least one type of particles selected from the group consisting of clusters, nanoparticles, nanotubes, fibrous, convoluted or porous structures, particles having an average particle size in the range of from 10 nm to 10 mm and accumulations thereof, such as agglomerates or aggregates, and
• water or at least one other polar solvent and optionally at least one further solvent,
• wherein a coating having a thickness of at least one monolayer is formed from the educt mixture on at least a part of the surfaces of the particles, the coating comprising either a substantial content of monomers or oligomers, alongside, where appropriate, at least one further component of the educt mixture, or a substantial content of conductive polymer,
• wherein in the dispersion, in the mass, in the sol or gel or—optionally at least after separating off some of the liquid—in an aerosol at least apart of the monomers or oligomers is reacted by oxidation chemically with at least one oxidizing agent, electrochemically under an electrical voltage or photochemically under the action of electromagnetic radiation, in each case in the
• presence of at least one type of mobile corrosion-protecting anions before during or after coating of the particles, at least partly to give at least one oligomer or optionally partly or completely to give in each case at least one polymer, copolymer, block copolymer or graft copolymer in a mixture comprising water or at least one other polar solvent (“product(s)”),
• wherein the oligomers, polymers, copolymers, block copolymers or graft copolymers formed by this means—in the following called “conductive polymers”—are at least partly electrically conductive or become more electrically conductive.

A process comprising coating inorganic or organic particles, in which the particles ate present in a mixture or are initially formed in this, wherein the mixture is a dispersion, a flowable or kneadable mass, a sot or a gel, wherein the mixture is a product mixture and comprises:

• at least one electrically “conductive polymer” based on an oligomer/polymer/copolymer/block copolymer/graft copolymer,
• at least one type of anions—optionally at least one salt, one ester or at least one acid as a carrier of these anions
• wherein this at least one type of anions in the conductive polymer can be incorporated or is at least partly incorporated into the structure of the conductive polymer as a doping ion, can also be released again from this structure in the event of a drop in potential of the conductive polymer (reduction) and if a metallic surface is present, can have a corrosion-protecting action—in the following called “mobile corrosion-protecting anions”,
• at least one type of particles chosen from clusters, nanoparticles, nanotubes, fibrous, convoluted or porous structures, particles having an average particle size in the range of from 10 nm to 10 mm and accumulations thereof, such as agglomerates or aggregates, and
• optionally oxidizing agents, water or at least one other solvent,
• wherein a coating having a thickness of at least one monolayer is formed from the product mixture on at least part of the surfaces of the particles,
• wherein the oligomers, polymers, copolymers, block copolymers or graft copolymers formed—in the following called “conductive polymers”—are at least partly electrically conductive or become more electrically conductive.

A composition of a coating comprising conductive polymer comprising

• at least one oligomer, polymer, copolymer, block copolymer or graft copolymer with a content of conductive polymers in the range of from 0.1 to 30 wt. %,
• at least one anion with a content of anions in the range of from 0.1 to 40 wt. %, which is at least partly incorporated into the conductive polymer,
• optionally at least one oxidizing agent and
• at least one type of particles with a content of in particular inorganic particles in the range of from 30 to 98 wt. %,
• wherein all these contents, including optionally further additions not mentioned here, but without solvent, give 100 wt. % in total, and
• optionally at least one solvent in particular for the products, anions or oxidizing agents with contents in the range of from 0.1 to 4,000 wt. %, stated above 100 wt. %,