# US 7,608,306 B2 · Method for the production of anti-statically coated moulded body > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,608,306 B2 - Document ID: US7608306B2 - Status: Granted - Kind: B2 - Application number: 10/548,878 - Filed: 2004-03-02 - Published: 2006-07-20 - Granted: 2009-10-27 - Earliest claimed: 2003-03-14 - Assignees: Evonik Degussa GmbH - Inventors: Thomas Hasskerl; Stipan Katusic; Patrick Becker; Rolf Neeb; Ghirmay Seyoum - Web page: https://patentgrep.com/patent/US7608306B2 ## CPC - C09D 5/24: Electrically-conducting paints {(conductive materials H01B1/00)} - Y10T 428/31511: Of epoxy ether - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A process is described for producing mouldings from plastics by coating a moulding on one or more sides with a lacquer system, the lacquer system being composed of a binder or a binder mixture, optionally a solvent or solvent mixture, optionally other additives usual in lacquer systems and optionally a thickener, and use can be made here of polymeric thickeners at from 0 to 20% content and oligomeric thickeners at from 0 to 40% content, in each case based on dry film (components a, c, d, e), from 5 to 500 parts by weight, based on a), of an electrically conductive metal oxide powder with a median primary particle size of from 1 to 80 nm and a percentage degree of aggregation of from 0.01 to 99%, from 5 to 500 parts by weight, based on a), of inert nanoparticles coated [sic] in a manner known per se and the lacquer cured. ## Claims ### Claim 1 A process for producing a moulding, comprising: coating a moulding of a plastic on one or more sides with a lacquer composition, to obtain a coating on said moulding; and curing said coating on said moulding; said lacquer composition comprising: a) a binder or a binder mixture; b) optionally, a solvent or solvent mixture; c) optionally, other additives; d) optionally, a thickener or thickener mixture comprising from 0 to 20% of polymeric thickeners and from 0 to 40% of oligomeric thickeners, in each case based on a dry film of components a, c, d, e; e) from 5 to 500 parts by weight, based on a), of an electrically conductive metal oxide powder with a median primary particle size of from 1 to 80 nm and a percentage degree of aggregation of from 0.01 to 99%, wherein said degree of aggregation is based on aggregates which comprise at least two primary particles; wherein a particle size of the aggregated particles is 50 to 200 nm; and wherein 25 to 90% of the particles are agglomerated in a chain-like series; f) from 5 to 500 parts by weight, based on a), of inert nanoparticles. ### Claim 2 (depends on 1) The process according to claim 1, wherein a mixture of components a)-c) has a viscosity of from 5 to 500 mPa.s as measured in a Brookfield LVT viscometer. ### Claim 3 (depends on 1) The process according to claim 1, wherein a mixture of components a)-e) has a viscosity of from 150 to 5000 mPa.s. ### Claim 4 (depends on 1) The process according to claim 1, wherein said inert nanoparticles comprise SiO2 nanoparticles. ### Claim 5 (depends on 1) The process according to claim 1, wherein the electrically conductive particles comprise a mixture comprising ITO, antimony tin oxide (ATO), doped ITO or mixtures thereof. ### Claim 6 (depends on 1) A plastics moulding, obtained by a process of claim 1, wherein the plastics moulding comprises at least one of PMMA, PC, PET, PET-G, PE, PVC, ABS or PP. ### Claim 7 (depends on 1) The process according to claim 1, wherein component b) is present. ### Claim 8 (depends on 1) The process according to claim 1, wherein component c) is present. ### Claim 9 (depends on 1) The process according to claim 1, wherein component d) is present. ### Claim 10 (depends on 1) The process according to claim 1, wherein component d) is present and comprises a copolymer of (meth)acrylates. ### Claim 11 (depends on 1) The process according to claim 1, wherein component d) is present and comprises oligomeric epoxyacrylates, urethane acrylates, silicone acrylates, polyester acrylates, epoxy acrylates, polyethylene glycol diacrylates or mixtures thereof. ### Claim 12 (depends on 1) The process according to claim 1, wherein component e) is in an undispersed condition. ### Claim 13 (depends on 1) The process according to claim 1, wherein component e) comprises (i) an aggregate of primary particles, (ii) an agglomerate of primary particles and aggregates, or (iii) combinations of (i) and (ii). ### Claim 14 (depends on 1) The process according to claim 1, wherein component e) comprises an agglomerate of primary particles and aggregates, wherein a particle size of the agglomerate is up to 2000 nm. ### Claim 15 (depends on 1) The process according to claim 1, wherein component e) comprises an agglomerate of primary particles and aggregates, wherein a particle size of the agglomerate is up to 1000 nm. ### Claim 16 (depends on 1) The process according to claim 1, wherein component e) comprises an aggregate which comprises secondary particles durably combined by way of sinter bridges, wherein said aggregate cannot be separated by a dispersion process. ### Claim 17 (depends on 1) The process according to claim 1, wherein component e) comprises primary particles having a median primary particle size from 5 to 50 nm. ### Claim 18 (depends on 1) The process according to claim 1, wherein component e) comprises an agglomerate which comprises secondary particles held together by Van der Waals forces and separable by dispersion processes. ### Claim 19 (depends on 1) The process according to claim 1, wherein component e) comprises an indium tin oxide powder which has from 10 to 80% by volume content of aggregated particles whose particle size is from 50 to 200 nm. ### Claim 20 (depends on 1) The process according to claim 1, wherein component e) comprises indium tin oxide powder obtained by converting an metal chloride compound into a metal oxide in a high-temperature flame. ### Claim 21 (depends on 1) The process according to claim 1, wherein the chain-like aggregates have branching or take the form of three-dimensional structures of series of particles. ### Claim 22 (depends on 1) The process according to claim 1, wherein component e) comprises indium tin oxide having a median primary particle size from 1 to 200 nm, a BET surface area according to DIN 66131 from 0.1 to 300 m2/g, a cubic structure of indium oxide, mesopores according to DIN 66134 from 0.03 ml to 0.30 ml/g, macropores according to DIN 66133 from 1.5 to 5.0 ml/g and a bulk density according to DIN ISO 787/11 from 50 to 2000 g/l. ### Claim 23 (depends on 1) The process according to claim 1, wherein said lacquer composition comprises from 0.1 to 50% by weight of inert nanoparticles and from 20 to 70% by weight of ITO, based in each case on a dry film. ### Claim 24 (depends on 1) The process according to claim 1, wherein said inert nanoparticles are SiO2 nanoparticles. ### Claim 25 (depends on 1) The process according to claim 1, wherein said inert nanoparticles are organosols or silica sols. ### Claim 26 (depends on 1) The process according to claim 1, wherein said inert nanoparticles are SiO2, Al2O3 or combinations thereof. ### Claim 27 (depends on 1) The process according to claim 1, wherein said inert nanoparticles are zirconium oxide, titanium dioxide, iron oxide or mixtures thereof. ### Claim 28 (depends on 1) The process according to claim 1, wherein said inert nanoparticles are fine-particle destructured fumed silicas. ### Claim 29 (depends on 1) The process according to claim 1, comprising functional nanoparticles. ### Claim 30 (depends on 1) The process according to claim 1, wherein the plastic is transparent. ### Claim 31 (depends on 1) The process according to claim 1, wherein a transparency of the moulding having a laquer coating without inert nanoparticles is substantially the same as the transparency of the moulding having a laquer coating with inert nanoparticles. ### Claim 32 (depends on 1) The process according to claim 1, wherein a conductivity in said coating which is achieved when using said nanoparticles and not more than 33% by weight of ITO is identical to a conductivity achieved when using no nanoparticles and 50% by weight of ITO. ### Claim 33 (depends on 1) The process according to claim 1, wherein component d) is present and comprises a copolymer of (meth)acrylates and a vinyl monomer in copolymerized form. ### Claim 34 (depends on 1) The process according to claim 1, wherein component d) is present and comprises a copolymer comprising methyl methacrylate and butyl acrylate. ### Claim 35 (depends on 1) The process according to claim 1, wherein component d) is present and comprises a polymer comprising about 75% by weight of methyl methacrylate and about 25% by weight of butyl acrylate. ### Claim 36 (depends on 1) The process according to claim 1, wherein component e) comprises indium tin oxide obtained by mixing a solution of an indium salt with a solution of a tin salt, optionally adding a solution of a salt of at least one doping component, to obtain a solution mixture, atomizing said solution mixture, to obtain an atomized solution mixture, pyrolyzing the atomized solution mixture, thereby obtaining exhaust gases and isolating said indium tin oxide from the exhaust gases, wherein said indium salt is a chloride, nitrate, acetate, or alcoholate. ### Claim 37 (depends on 6) A glazing for encasing structures, for equipping cleanrooms, for machine covers, for incubators, for displays, for visual display screens and visual-display-screen covers, for back-projection screens, for medical apparatus, and for electrical devices comprising a plastics moulding according to claim 6.