US 11,945,971 B2
Anti-corrosion material-coated discrete graphene sheets and anti-corrosion coating composition containing same
Fan-Chun Meng, Taipei (TW); Yi-jun Lin, Taoyuan (TW); Shaio-yen Lee, New Taipei (TW); Wen Y. Chiu, Taipei (TW); Aruna Zhamu, Springboro, OH (US); and Bor Z. Jang, Centerville, OH (US)
Assigned to Global Graphene Group, Inc., Dayton, OH (US)
Filed by Nanotek Instruments, Inc., Dayton, OH (US)
Filed on May 8, 2018, as Appl. No. 15/973,651.
Prior Publication US 2019/0345344 A1, Nov. 14, 2019
Int. Cl. B32B 9/00 (2006.01); C09D 5/08 (2006.01); C09D 149/00 (2006.01); C09D 163/00 (2006.01); C09D 175/02 (2006.01); C09D 175/04 (2006.01); C23F 11/18 (2006.01); B82Y 30/00 (2011.01); C08K 3/04 (2006.01); C08K 3/08 (2006.01); C08K 9/04 (2006.01)
CPC C09D 5/084 (2013.01) [C09D 149/00 (2013.01); C09D 163/00 (2013.01); C09D 175/02 (2013.01); C09D 175/04 (2013.01); C23F 11/184 (2013.01); B82Y 30/00 (2013.01); C08K 3/042 (2017.05); C08K 2003/0812 (2013.01); C08K 2003/0893 (2013.01); C08K 9/04 (2013.01); C08K 2201/011 (2013.01); Y10T 428/30 (2015.01)] 21 Claims
OG exemplary drawing
 
1. A graphene-based coating suspension comprising multiple graphene sheets each having two opposed parallel surfaces, thin film coating having a thickness from 0.5 nm to 100 nm of an anti-corrosive pigment or sacrificial metal coated on and covering at least 50% area of one of said two parallel surfaces, and a binder resin dissolved or dispersed in a liquid medium, wherein said multiple graphene sheets contain single-layer or few-layer graphene sheets selected from a pristine graphene material having essentially zero % of non-carbon elements, or a non-pristine graphene material having 0.001% to 47% by weight of non-carbon elements wherein said non-pristine graphene is selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, doped graphene, chemically functionalized graphene, or a combination thereof and wherein said graphene sheets have a weight fraction from 0.1% to 30% based on the total coating suspension weight excluding the liquid medium, wherein said anti-corrosive pigment or sacrificial metal is selected from zinc phosphate;
wherein said binder resin contains a resin selected from urethane-urea resin, acrylic alkyd resin, polyimide, thermoset polyester, vinyl ester resin, silicate adhesive, or a combination thereof.