Nonionic epoxy active emulsifier, preparation method of nonionic epoxy active emulsifier and waterborne epoxy resin emulsion
A water-based epoxy resin, active emulsifier technology, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve problems such as environmental pollution and human health hazards
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Embodiment 1
[0028] Embodiment 1 This embodiment relates to the synthesis of HHPA-P-TMPGE
[0029] Add 180.00g (30mmol) PGE6000 and 9.24g (60mmol) HHPA to a 500ml four-neck flask, put it under reflux and under a nitrogen atmosphere, heat and stir to mix the raw materials evenly, add 0.5g (0.3wt%) p-toluenesulfonic acid The above reaction solution was kept at a temperature of 90°C, and the acid value was tested every 0.5h, and the esterification rate was calculated. Reaction 4h. Then add 12.78g (30mmol) TMPGE to the system under the action of catalyst p-toluenesulfonic acid (no need to add catalyst), continue to react for 4h at a temperature of 110°C, and test the epoxy equivalent every 0.5h to calculate the epoxy conversion Rate. Finally, HHPA-P-TMPGE was obtained.
[0030] Equipment routes such as figure 1 and figure 2 shown.
Embodiment 2
[0031] Embodiment 2 This embodiment relates to the preparation of aqueous epoxy resin emulsion
[0032] Add the HHPA-P-TMPGE and E-21 prepared in Example 1 into a 500ml four-necked flask at a ratio of 15:85, heat to 70°C, stir mechanically (3000r / min), and dropwise add deionized water until the viscosity of the system suddenly decreases. At this time, the system has a phase inversion phenomenon, from water-in-oil (W / O) to oil-in-water (O / W). Continue to add deionized water and water-based environment Oxygen emulsion.
[0033] Test items
[0034] It can be seen from the relevant data that the emulsifier of the present invention has a small particle size of the emulsified E-21 epoxy emulsion and strong stability. The emulsifier contains a double epoxy group that can react with the curing agent. Improve and enhance the salt spray resistance and secondary adhesion of the paint film.
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