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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

Inactive Publication Date: 2017-08-29
HAOLISEN CHEM TECH (JIANGSU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, solvent-based epoxy resins contain organic volatile solvents. These organic solvents enter the atmosphere due to volatilization during the application stage of epoxy resins, causing pollution to the environment and endangering human health.

Method used

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  • Nonionic epoxy active emulsifier, preparation method of nonionic epoxy active emulsifier and waterborne epoxy resin emulsion
  • Nonionic epoxy active emulsifier, preparation method of nonionic epoxy active emulsifier and waterborne epoxy resin emulsion
  • Nonionic epoxy active emulsifier, preparation method of nonionic epoxy active emulsifier and waterborne epoxy resin emulsion

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Experimental program
Comparison scheme
Effect test

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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Abstract

The invention relates to a preparation method of a novel structure nonionic epoxy active emulsifier and a preparation method of an emulsion. The preparation method comprises (1) adding hexahydrophthalic anhydride (HHPA) and a catalyst (p-toluenesulfonic acid) into polyethylene glycol (PEG1000-10000) in a nitrogen atmosphere, and carrying out a heating reaction process, (2) adding an appropriate amount of a trifunctional diluent trimethylolpropane triglycidylglyceride (TMPGE), and carrying out a heating reaction process to obtain a multi-block epoxy resin emulsifier (called as HHPA-P-TMPGE for short), and (3) mixing an appropriate amount of epoxy resin and the emulsifier at a certain temperature, adding deionized water into the mixture drop by drop at a certain flowing rate, carrying out high rate stirring until the system viscosity is suddenly reduced and phase inversion is produced in the system, and adding water into the reaction system to obtain a waterborne epoxy resin emulsion. The waterborne epoxy resin emulsion has the advantages of small average particle size, low dispersion degree and excellent dilution, centrifugation and storage performances. The preparation method provides a novel thinking for preparation of a high performance waterborne epoxy emulsion.

Description

technical field [0001] The invention discloses a preparation method of a nonionic epoxy emulsifier. Nonionic reactive epoxy resin emulsifiers react with polyethylene glycol or polypropylene glycol to generate carboxyl-terminated (HHPA-PEG / PPG). Condensation with trimethylolpropane triglycidyl (TMPGE) to obtain HHPA-PEG modified TMPGE. Combined with phase inversion technology to prepare epoxy water emulsion with small particle size and uniformity. Background technique [0002] In recent years, epoxy resin coatings, especially water-based epoxy resin coatings, have developed rapidly. Because epoxy resin has excellent physical and chemical properties, such as good adhesion, excellent chemical resistance and solvent resistance, high hardness, corrosion resistance, and excellent thermal stability, it is widely used. Generally, solvent-based epoxy resins contain organic volatile solvents. These organic solvents enter the atmosphere due to volatilization during the application s...

Claims

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Application Information

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IPC IPC(8): C08G65/332C08G65/331C08J3/03C08L63/00C09D163/00C09D5/08
CPCC08G65/3324C08G65/3318C08G2650/06C08G2650/38C08J3/03C08J2363/00C09D5/08C09D163/00
Inventor 郭利刘薇薇柳昀郑子童孔凡桃陈豪杰郭辉
Owner HAOLISEN CHEM TECH (JIANGSU) CO LTD
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