# US 9,428,651 B2 · Fouling and stiction resistant coating > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,428,651 B2 - Document ID: US9428651B2 - Status: Granted - Kind: B2 - Application number: 13/828,689 - Filed: 2013-03-14 - Published: 2014-03-06 - Granted: 2016-08-30 - Earliest claimed: 2012-08-29 - Assignees: Teledyne Scientific & Imaging, LLC - Applicants: Teledyne Scientific & Imaging, LLC - Inventors: Rahul Ganguli; Vivek Mehrotra; Young J. Chung; J. Eric Henckel - Web page: https://patentgrep.com/patent/US9428651B2 ## CPC - C09D 5/1662: {Synthetic film-forming substance} - C09D 5/1681: {Antifouling coatings characterised by surface structure, e.g. for roughness effect giving superhydrophobic coatings or Lotus effect} - C09D 5/1693: {as part of a multilayer system} - Y10T 428/24405: Polymer or resin [e.g., natural or synthetic rubber, etc.] - 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 fouling and stiction-resistant coating suitable for use with marine streamers is made from a silicone undercoat layer and a powdery topcoat layer. The powdery topcoat layer is preferably a non-toxic fluoropolymer which has a low surface energy, a high modulus, and which is not continuous. There may also be a primer layer below the silicone undercoat layer. The powdery topcoat layer is preferably arranged to be penetrable by the feet of barnacles that come into contact with it, with the silicone undercoat layer arranged such that the barnacles' feet that penetrate the powdery topcoat layer bond with the silicone undercoat layer. The powdery topcoat layer is preferably further arranged to peel away from the silicone undercoat layer when force is applied to the barnacles to remove them from the coating. ## Claims ### Claim 1 A fouling and stiction-resistant coating, comprising: a silicone undercoat layer; and a powdery topcoat layer on said silicone undercoat layer, said coating adapted for application to a surface that is subject to fouling; said powdery topcoat layer arranged to be penetrable by the feet of barnacles that come into contact with said powdery topcoat layer, and said silicone undercoat layer arranged such that at least some of the barnacles' feet that penetrate said powdery topcoat layer bond with said silicone undercoat layer; said powdery topcoat layer further arranged to peel away from said silicone undercoat layer when force is applied to barnacles which have penetrated said powdery topcoat layer to remove them from said coating; such that said coating both resists fouling in the presence of marine life and reduces stiction between surfaces to which said coating has been applied. ### Claim 2 (depends on 1) The coating of claim 1, wherein said powdery topcoat layer is a fluoropolymer. ### Claim 3 (depends on 2) The coating of claim 2, wherein said fluoropolymer is not continuous. ### Claim 4 (depends on 2) The coating of claim 2, wherein said fluoropolymer is non-toxic. ### Claim 5 (depends on 2) The coating of claim 2, wherein said fluoropolymer is non-uniform and hydrophobic. ### Claim 6 (depends on 2) The coating of claim 2, wherein said fluoropolymer is a tetrafluoropolymer. ### Claim 7 (depends on 2) The coating of claim 2, wherein said powdery topcoat layer has a thickness of 100 nm-1 micron. ### Claim 8 (depends on 2) The coating of claim 2, wherein said fluoropolymer is selected from a group consisting of polytetrafluoroethylene (PTFE) (Teflon), fluorinated ethylene propylene (FEP), polyfluoroalkoxy (PFA), ethylene tetrafluoroethylene (ETFE), and ethylene chlorotrifluoroethylene (ECTFE). ### Claim 9 (depends on 1) The coating of claim 1, wherein said silicone undercoat layer has a thickness of 50 microns-500 microns. ### Claim 10 (depends on 1) The coating of claim 1, wherein said silicone undercoat layer comprises a UV-cured silicone, a room temperature-cured silicone (RTV), or a thermally cured silicone. ### Claim 11 (depends on 1) The coating of claim 1, further comprising a primer layer under said silicone undercoat layer. ### Claim 12 (depends on 11) The coating of claim 11, wherein said primer layer has a thickness of 10 nm-10 microns. ### Claim 13 (depends on 11) The coating of claim 11, wherein said primer layer comprises an epoxy-modified siloxane. ### Claim 14 (depends on 11) The coating of claim 11, further comprising a substrate layer under said primer layer, said primer layer arranged to improve the adhesion of said silicone undercoat layer to said substrate layer. ### Claim 15 (depends on 1) The coating of claim 1, further comprising a substrate layer under said silicone undercoat layer. ### Claim 16 (depends on 15) The coating of claim 15, wherein said substrate layer comprises polyurethane. ### Claim 17 (depends on 15) The coating of claim 15, wherein said substrate layer has a thickness of 1 mm-1 cm. ### Claim 18 (depends on 1) The coating of claim 1, further comprising a cable on which said coating is applied. ### Claim 19 (depends on 18) The coating of claim 18, wherein said cable is a marine streamer, said coating arranged to reduce stiction between streamer sections when said streamer is spooled. ### Claim 20 A marine streamer with a fouling and stiction-resistant coating, comprising: a substrate layer; a primer layer on said substrate layer; a silicone undercoat layer on said primer layer; and a powdery topcoat layer on said undercoat layer; said coating arranged to resist fouling and to reduce stiction between streamer sections when said streamer is spooled; said powdery topcoat layer arranged to be penetrable by the feet of barnacles that come into contact with said powdery topcoat layer, and said silicone undercoat layer arranged such that at least some of the barnacles feet' that penetrate said powdery topcoat layer bond with said silicone undercoat layer; said powdery topcoat layer further arranged to peel away from said silicone undercoat layer when force is applied to barnacles which have penetrated said topcoat to remove them from said streamer.