# US 2014/0001048 A1 · Coating method by electrocatalyzed chemical grafting of a surface of a substrate with a polymeric layer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0001048 A1 - Document ID: US20140001048A1 - Status: Published application - Kind: A1 - Application number: 13/996,614 - Filed: 2011-12-21 - Published: 2014-01-02 - Earliest claimed: 2010-12-22 - Assignees: Pegastech - Inventors: Sebastien Roussel; Matthieu Laurent; Christian Maennel - Web page: https://patentgrep.com/patent/US20140001048A1 ## CPC - C25D 9/02: with organic materials - C08J 7/16: with polymerisable compounds - C09D 5/4411: {Homopolymers or copolymers of acrylates or methacrylates} - C25D 13/04: with organic material - C25D: PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - 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) ## Abstract The present invention relates to a coating method by electrocatalyzed chemical grafting of a surface of a substrate with a polymeric layer characterized in that it comprises the following steps: a. a substrate is provided, b. a bath containing at least one polymerizable monomer via a radical route, at least one cleavable aryl salt, at least one reducing agent and at least one solvent is provided, in which a potential difference is applied, c. said substrate is immersed in said bath, d. a grafted polymer is obtained on the surface of said substrate. The invention also relates to a substrate obtained according to the coating method by electrocatalyzed chemical grafting, the surface of which is coated with a polymeric layer. ## Claims ### Claim at position 1 1-15. (canceled) ### Claim 16 A coating method by electrocatalyzed chemical grafting of a substrate surface with a polymeric layer comprising: a) providing a substrate; b) applying a potential difference to a bath containing at least one radically polymerizable monomer, at least one cleavable aryl salt, at least one reducing agent, and at least one solvent; c) immersing said substrate in said bath, and d) grafting a polymer on the surface of said substrate, wherein said monomer comprises at least one ethylenic bond. ### Claim 17 (depends on 16) The method according to claim 16, wherein said substrate is a conducting, semi-conducting, or non-conducting substrate. ### Claim 18 (depends on 17) The method according to claim 17, wherein said substrate is a conducting substrate selected from metals, stainless steel, steels, noble metals or alloys thereof. ### Claim 19 (depends on 17) The method according to claim 17, wherein said substrate is a non-conducting substrate selected from natural, artificial, synthetic, thermoplastic, thermosetting, thermostable, elastomeric, one-dimensional, or three-dimensional polymers. ### Claim 20 (depends on 16) The method according to claim 16, wherein said monomer comprises an acrylate or a derivative thereof. ### Claim 21 (depends on 16) The method according to claim 16, wherein said cleavable aryl salt is selected from the group consisting of aryl diazonium salts, aryl ammonium salts, aryl phosphonium salts, aryl sulfonium salts and aryl iodonium salts. ### Claim 22 (depends on 16) The method according to claim 16, wherein said cleavable aryl salt is prepared in situ in step b). ### Claim 23 (depends on 16) The method according to claim 16, wherein said reducing agent is a reducing metal a metal salt or an organic reducing agent. ### Claim 24 (depends on 23) The method according to claim 23, wherein said reducing metal is finely divided. ### Claim 25 (depends on 23) The method according to claim 23, wherein said metal salt is a metallocene. ### Claim 26 (depends on 23) The method according to claim 23, wherein said organic reducing agent is hypophosphorous acid or ascorbic acid. ### Claim 27 (depends on 16) The method according to claim 16, wherein said potential difference is applied by a generator connected to two electrodes immersed in said bath. ### Claim 28 (depends on 27) The method according to claim 27, wherein said potential difference is 0.1 V to 2 V. ### Claim 29 (depends on 16) The method according to claim 16, wherein said potential difference is generated by a chemical cell created between two different electrodes immersed in said bath. ### Claim 30 (depends on 29) The method according to claim 29, wherein said electrodes are nickel, zinc, iron, silver, copper, or an alloy thereof. ### Claim 31 (depends on 29) The method according to claim 29, wherein said potential difference generated by the chemical cell is 0.1 V to 1.5 V. ### Claim 32 (depends on 16) The method according to claim 16, wherein the pH of said bath is acidic. ### Claim 33 (depends on 16) A substrate obtained by a method according to claim 16, comprising a non-conductive substrate and a polymer layer chemically grafted to a surface of said non-conductive substrate.