US 12,146,070 B2
Eco-friendly hydrophobic or ultrahydrophobic coating method
Woonbong Hwang, Seoul (KR); Seongmin Kim, Cheonan-si (KR); and Jeong-Won Lee, Gwangju (KR)
Assigned to POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION, Pohang-si (KR)
Appl. No. 17/775,379
Filed by POSTECH Research and Business Development Foundation, Pohang-si (KR)
PCT Filed Jan. 29, 2021, PCT No. PCT/KR2021/001257
§ 371(c)(1), (2) Date May 9, 2022,
PCT Pub. No. WO2021/241843, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 10-2020-0063861 (KR), filed on May 27, 2020.
Prior Publication US 2023/0081036 A1, Mar. 16, 2023
Int. Cl. C09D 183/04 (2006.01); B05D 3/02 (2006.01); B05D 3/10 (2006.01); B05D 5/08 (2006.01); B05D 7/16 (2006.01); C08G 77/04 (2006.01); C08K 3/28 (2006.01); C09D 5/00 (2006.01); C09D 7/61 (2018.01); C23F 1/34 (2006.01); C23F 1/36 (2006.01)
CPC C09D 183/04 (2013.01) [B05D 3/0254 (2013.01); B05D 3/102 (2013.01); B05D 5/08 (2013.01); B05D 7/16 (2013.01); C08G 77/04 (2013.01); C08K 3/28 (2013.01); C09D 5/00 (2013.01); C09D 7/61 (2018.01); C23F 1/34 (2013.01); C23F 1/36 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A surface modification method comprising:
preparing a metal substrate on which surface roughness is formed;
preparing a coating solution in which a polydimethylsiloxane (PDMS) agent and ammonium bicarbonate are mixed; and
coating the surface of the metal substrate on which the surface roughness is formed with PDMS by increasing a temperature of the coating solution,
wherein the preparing the metal substrate on which the surface roughness is formed comprises forming the surface roughness on the metal substrate, and
the coating of the surface of the substrate on which the surface roughness is formed with PDMS by increasing the temperature of the coating solution includes increasing the temperature after the substrate on which the surface roughness is formed and the coating solution are loaded in an airtight container.