	US 11,981,969 B2
	Leather finishing agent and preparation method thereof
Taotao Qiang, Xi'an (CN); Linxin Guo, Xi'an (CN); Yangmin Ma, Xi'an (CN); and Tingting Dai, Xi'an (CN)
Assigned to Shaanxi University of Science & Technology, Xi'an (CN)
Filed by Shaanxi University of Science & Technology, Xi'an (CN)
Filed on May 12, 2021, as Appl. No. 17/318,789.
Claims priority of application No. 202010898803.9 (CN), filed on Aug. 31, 2020.
Prior Publication US 2022/0064743 A1, Mar. 3, 2022
Int. Cl. C14C 11/00 (2006.01); C09D 5/00 (2006.01); C09D 129/02 (2006.01)

CPC C14C 11/00 (2013.01) [C09D 5/00 (2013.01); C09D 129/02 (2013.01)]

10 Claims

1. A method of preparing a leather finishing agent comprising:

heating a raw material comprising a polyphenol, an auxiliary agent comprising hexamethylene tetramine, and a solvent comprising a protonic acid to form a reaction mixture,

hydrolyzing the reaction mixture, and

dispersing the hydrolyzed reaction mixture with water to form the leather finishing agent.