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.
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