# US 10,308,819 B2 · Anticorrosive coating composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,308,819 B2 - Document ID: US10308819B2 - Status: Granted - Kind: B2 - Application number: 15/288,288 - Filed: 2016-10-07 - Published: 2017-04-13 - Granted: 2019-06-04 - Earliest claimed: 2015-10-09 - Assignees: Ewald Dörken AG - Applicants: Ewald Dörken AG - Inventors: Marcel Roth; Vanessa Kurze; Marcus Lämmer; Sandra Böhm; Verena Grossmann; Gerhard Reusmann - Web page: https://patentgrep.com/patent/US10308819B2 ## CPC - C09D 5/106: {containing Zn} - C08G 77/58: Metal-containing linkages - C08K 3/08: Metals - C09D 5/10: containing metal dust - C09D 7/61: inorganic - C09D 183/04: Polysiloxanes - C08G 77/18: to alkoxy or aryloxy groups - C08K 2003/0812: {Aluminium} - C08K 2003/0862: {Nickel} - C08K 2003/0881: {Titanium} - C08K 2003/0893: {Zinc} - C08K 2201/019: the composition being defined by the absence of a certain additive - 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) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract The invention relates to an anticorrosive coating composition. In order to provide an anticorrosive coating composition which cures at room temperature, provision is made for the anticorrosive coating composition to comprise at least one polysiloxane and metal particles and also at least one crosslinker, the coating composition crosslinking chemically at room temperature. The invention further relates to a method for applying the anticorrosive coating composition and also to the coated substrate. ## Claims ### Claim 1 An anticorrosive coating composition comprising at least one polysiloxane and metal particles and also at least one crosslinker, the coating composition crosslinking chemically at room temperature, wherein the polysiloxane has a weight-average molecular weight Mw in the range from 800 to 25 000 g/mol, wherein polysiloxane and crosslinker together form a reactive binder system wherein the fraction of the polysiloxane in the reactive binder system is more than 90 wt % and the complementary fraction of the crosslinker is less than 10 wt %, wherein the crosslinker is selected from the group of reactive silanes, silane hydrolysates, titanates, zirconates, organometallic compounds, acids and bases and mixtures thereof, and wherein the coating composition has a fraction of metal particles in the range from 70 to 98 wt %, based on the coating composition. ### Claim 2 (depends on 1) The anticorrosive coating composition according to claim 1, characterized in that the coating composition is free from water. ### Claim 3 (depends on 1) The anticorrosive coating composition according to claim 1, in that the coating composition comprises organic solvents in amounts of at most 3 wt %, based on the coating composition. ### Claim 4 (depends on 1) The anticorrosive coating composition according to claim 1, characterized in that the coating composition crosslinks in the presence of atmospheric moisture. ### Claim 5 (depends on 1) The anticorrosive coating composition according to claim 1, characterized in that the polysiloxane is a reactive polysiloxane. ### Claim 6 (depends on 1) The anticorrosive coating composition according to claim 1, characterized in that the polysiloxane has a weight-average molecular weight Mw in the range from 1500 to 18 000 g/mol. ### Claim 7 (depends on 1) The anticorrosive coating composition according to claim 1, characterized in that the metal particles are selected from the group of zinc, aluminium, magnesium, manganese and nickel and/also mixtures and alloys thereof. ### Claim 8 (depends on 1) The anticorrosive coating composition according to claim 1, characterized in that the coating composition has a fraction of metal particles in the range from 80 to 96 wt %, based on the coating composition. ### Claim 9 (depends on 1) A method for coating a metal substrate with an anticorrosive coating composition, more particularly according to claim 1, comprising the following steps: (a) cleaning the metal substrate, (b) applying the anticorrosive coating composition, and (c) curing the anticorrosive coating to a dust-dry state at room temperature within a period of up to 300 minutes. ### Claim 10 (depends on 9) The method according to claim 9, characterized in that after cleaning has taken place, a pretreatment layer, more particularly a conversion layer, is applied to the metal substrate. ### Claim 11 (depends on 10) The method according to claim 10, characterized in that the pretreatment layer is obtainable by phosphatizing and/or chromating. ### Claim 12 (depends on 9) The method according to claim 9, characterized in that at least one further coating is applied to the anticorrosive coating. ### Claim 13 A metal substrate coated with an anticorrosive coating comprising a matrix of a polysiloxane and at least one crosslinker and also metal particles. ### Claim 14 (depends on 13) The metal substrate according to claim 13, coated with an anticorrosive coating and also at least one further coating applied to the anticorrosive coating.