US 12,448,536 B2
Nano metal paste, and preparation and application thereof
Yu Zhang, Guangzhou (CN); Kai Yang, Guangzhou (CN); Guannan Yang, Guangzhou (CN); and Chengqiang Cui, Guangzhou (CN)
Assigned to Guangdong University of Technology, Guangzhou (CN)
Filed by Guangdong University of Technology, Guangzhou (CN)
Filed on Dec. 18, 2023, as Appl. No. 18/543,147.
Claims priority of application No. 202310581333.7 (CN), filed on May 23, 2023.
Prior Publication US 2024/0117209 A1, Apr. 11, 2024
Int. Cl. C09D 11/52 (2014.01); C09D 17/00 (2006.01)
CPC C09D 11/52 (2013.01) [C09D 17/006 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for preparing a nano metal paste, comprising:
(S1) adding an organic metallic salt and an organic reducing agent to a solvent to obtain a first mixture, wherein the solvent is water, an organic solvent or a combination thereof;
(S2) reacting the first mixture under heating to obtain a second mixture containing metal nanoparticles; and
(S3) concentrating the second mixture to obtain the nano metal paste without drying, grinding, and separating steps, wherein a weight percentage of the metal nanoparticles in the nano metal paste is 20-95%; and
wherein the organic reducing agent is selected from the group consisting of pyrocatechin, aniline, and a combination thereof;
in the step (S2), the metal nanoparticles are selected from the group consisting of silver nanoparticles, gold nanoparticles, nickel nanoparticles, palladium nanoparticles, tungsten nanoparticles, cobalt nanoparticles and platinum nanoparticles; and
when the metal nanoparticles are silver nanoparticles, the organic metallic salt is selected from the group consisting of silver formate, silver stearate, and a combination thereof.