US 12,012,522 B2
Non-ablative multi-layer coatings for boat propellers that prevent water-derived damage, corrosion, and deterioration from biological chemical processes
Reed E. Phillips, Glen Cove, NY (US)
Assigned to REDJAK, LLC, Glen Cove, NY (US)
Filed by Redjak, LLC, Glen Cove, NY (US)
Filed on Feb. 22, 2023, as Appl. No. 18/112,872.
Application 18/112,872 is a continuation in part of application No. 17/988,296, filed on Nov. 16, 2022.
Application 17/988,296 is a continuation in part of application No. 17/545,628, filed on Dec. 8, 2021, granted, now 11,661,520.
Prior Publication US 2023/0203322 A1, Jun. 29, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09D 5/16 (2006.01); C08K 3/01 (2018.01); C08K 5/00 (2006.01); C08K 5/56 (2006.01); C08L 75/04 (2006.01); C09D 7/40 (2018.01); C09D 7/61 (2018.01); C09D 175/04 (2006.01)
CPC C09D 5/1687 (2013.01) [C08K 3/01 (2018.01); C08K 5/0058 (2013.01); C08K 5/56 (2013.01); C08L 75/04 (2013.01); C09D 5/1618 (2013.01); C09D 5/1625 (2013.01); C09D 7/61 (2018.01); C09D 7/69 (2018.01); C09D 175/04 (2013.01); C08K 2201/005 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of protecting a propeller, comprising:
applying an inner polymer layer onto a propeller, the inner polymer layer being impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage and that does not chemically or galvanically interact with a material of the propeller; and
applying an outer polymer layer onto the inner polymer layer, the outer polymer layer being impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage and that repels biofouling organisms to prevent invasion of the inner polymer layer, the biologically active chemical substance of the outer polymer layer including a copper-zinc-tin alloy with zinc having a weight percentage between 8% and 12%, with tin having a weight percentage between 1% and 5%, and with copper having a weight percent of at least 85%.