SELF-EMULSIFYING EPOXY RESIN EMULSION, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

摘要

Disclosed are a self-emulsifying epoxy resin emulsion, a preparation method therefor and an application thereof. The raw materials of the emulsion comprise 100-150 parts epoxy resin, 10-20 parts sorbitan polyoxyethylene ether fatty acid ester, 10-20 parts fatty alcohol polyether phosphate, 1-5 parts of an amine accelerator, and 100-10000 parts water. The feeding mass ratios of the epoxy resin to the sorbitan polyoxyethylene ether fatty acid ester and the fatty alcohol polyether phosphate are 1:0.075-0.18 and 1:0.07-0.2, respectively. The preparation thereof comprises: the epoxy resin undergoes a first reaction with the sorbitan polyoxyethylene ether fatty acid ester in the presence of the amine accelerator, then undergoes a second reaction with the fatty alcohol polyether phosphate, and is then mixed with water and is made; and an application thereof in epoxy coatings. In the present invention, a uniform and stable emulsion may be self-emulsified without adding a co-solvent. The emulsion has a long storage period, no VOC emissions, and has excellent film toughness and rust resistance after film formation.