US 12,077,632 B2
Waterborne epoxy resin for anti-corrosion coating, and preparation method and use thereof
Changlong Yang, Liaoning (CN); Mingjie Ju, Shanghai (CN); Bo Hu, Liaoning (CN); Shuwen Zheng, Liaoning (CN); Yuansheng Ma, Liaoning (CN); Yang Zheng, Liaoning (CN); Dazhong Wang, Liaoning (CN); Junlong Duo, Liaoning (CN); and Rongzhen Xia, Liaoning (CN)
Assigned to State Grid Liaoning Shenyang Electric Power Supply Company, Shenyang (CN); and State Grid Corporation of China, Beijing (CN)
Appl. No. 17/614,515
Filed by State Grid Liaoning Shenyang Electric Power Supply Company, Liaoning (CN); and State Grid Corporation of China, Beijing (CN)
PCT Filed Sep. 17, 2021, PCT No. PCT/CN2021/119101
§ 371(c)(1), (2) Date Nov. 27, 2021,
PCT Pub. No. WO2022/151754, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 202110039570.1 (CN), filed on Jan. 13, 2021.
Prior Publication US 2023/0159694 A1, May 25, 2023
Int. Cl. C08G 59/22 (2006.01); C08G 59/14 (2006.01); C08G 59/40 (2006.01); C08G 59/50 (2006.01); C09D 5/08 (2006.01); C09D 163/00 (2006.01)
CPC C08G 59/22 (2013.01) [C08G 59/1477 (2013.01); C08G 59/50 (2013.01); C09D 5/08 (2013.01); C09D 163/00 (2013.01); C08G 2150/90 (2013.01)] 8 Claims
 
1. A preparation method of a waterborne epoxy resin for an anti-corrosion coating, comprising the following steps:
S1: performing an epoxy ring-opening reaction to an epoxy resin using carboxylated methoxy polyethylene glycol to prepare a hydroxyl-containing epoxy resin oligomer;
S2: subjecting the hydroxyl-containing epoxy resin oligomer and an isocyanate to an end-capping reaction to obtain a urethane-containing epoxy resin; and
S3: adding deionized water to the urethane-containing epoxy resin, and stirring to obtain a waterborne epoxy resin emulsion;
wherein the epoxy resin is one selected from the group consisting of ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, pentanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, poly(ethylene glycol) diglycidyl ether, and poly(propylene glycol) diglycidyl ether; and,
in S3, a weight ratio of the deionized water to the urethane-containing epoxy resin is (1-2):1.