Preparation method of single-component waterborne epoxy ester emulsion

Abstract

The invention discloses a preparation method of a single-component waterborne epoxy ester emulsion, and relates to the technical field of waterborne epoxy ester emulsions. The preparation method comprises the following steps: adding 40-100 parts of polyethylene glycol into a four-neck flask, stirring, heating to 100 DEG C, vacuumizing, keeping the negative pressure of 0.08 Mpa for one hour, and cooling to 70 DEG C; and introducing hydrophilic groups into molecules of solid epoxy resin, so that the two ends of the molecules of the solid epoxy resin are hydrophilic, the molecules of the solid epoxy resin are hydrophobic and belong to an oleophylic phase, when the solid epoxy resin is dispersed in water at a high speed, a PEG part of the hydrophilic phase can extend to a water phase, and the molecules of the solid epoxy resin can extend to an oil phase, so that the oil-in-water emulsion does not need to be cured by a cross-linking agent, does not need to be diluted by an organic diluent and can form a film by itself, emulsion molecules contain molecular structures in solid epoxy resin, and the oil-in-water emulsion has good performance.

Description

technical field [0001] The invention belongs to the technical field of water-based epoxy ester emulsion, in particular to a preparation method of one-component water-based epoxy ester emulsion. Background technique [0002] The solid epoxy resin currently on the market is solid at room temperature, and needs to be dissolved by adding a large amount of organic solvents (toluene, xylene, acetone, etc.), and the volatilization of these solvents will affect the workers and surroundings during the formulation application and construction. The environment has caused great pollution. The solid epoxy resin molecule has highly active hydroxyl and epoxy groups, as well as rigid and anti-corrosion groups such as benzene rings and ether bonds. Therefore, developing an emulsion that does not require a solvent to dissolve solid epoxy resin while retaining the excellent properties of solid epoxy resin has a good market prospect. Especially in today's increasingly stringent environmental ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of one-component water-based epoxy ester emulsion, to solve the existing problems: in today's more and more stringent environmental protection requirements, the water-based and solvent-free epoxy resin is becoming more and more The more attention is paid, the current water-based epoxy resin is mainly divided into external emulsification type and self-emulsification type. The stability of the former is poor, and the particle size of the emulsion is large. With the prolongation of storage time, it is prone to hardening, delamination and other adverse phenomena.