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Single-component water-based epoxy resin emulsion and preparation method thereof

A technology of water-based epoxy resin and epoxy resin, which is applied in the field of chemical coatings, water-based epoxy resin emulsion and its preparation, can solve the problems of poor anti-corrosion performance, incomplete curing reaction, inability to form uniform and dense coating films, etc. Achieve the effect of low production cost, uniform distribution and prevention of coagulation

Inactive Publication Date: 2012-09-19
上海富朗化工科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curing reaction is not complete, and a uniform and dense coating film cannot be formed, and the anti-corrosion performance is not as good as that of solvent-based

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1 Preparation of Bisphenol A Type One-Component Waterborne Epoxy Resin Emulsion

[0047] A. Synthesis of Modified Epoxy Resin

[0048] 240g polyethylene glycol 1000 was added to the reactor, heated to 120-125 ° C, stirred to fully dissolve, vacuum dehydration 30min, then cooled to 75-80, added 50g toluene diisocyanate, insulation reaction 3 hours, added 280g bisphenol A epoxy resin, be warming up to 100-105 ℃ of insulation reaction 2 hours, be cooled to 75-80 ℃ and add 30g, methyl ethyl ketoxime, continue to react 1 hour, add remaining 300g epoxy resin, in 60-75 ℃ C was kept for 30 minutes, and the temperature was lowered to obtain a light yellow viscous modified epoxy resin.

[0049] B. Preparation of high-efficiency emulsifier

[0050] 200g polyether is added to the reactor with heating, reflux, stirring devices, feed nitrogen and stir, be heated to 70-80 DEG C and drip 75g octamethylcyclotetrasiloxane, react after 4 hours , add 280g epoxy resin, be warming...

Embodiment 2

[0059] The preparation of embodiment 2 bisphenol F type one-component waterborne epoxy emulsion

[0060] A. Synthesis of Bisphenol F Modified Epoxy Resin

[0061] 240g polyethylene glycol 1000 was added to the reactor, heated to 120-125 ° C, stirred to fully dissolve, vacuum dehydration 30min, then cooled to 75-80, added 50g toluene diisocyanate, insulation reaction 3 hours, added 280g bisphenol F epoxy resin, be warming up to 100-105 ℃ of insulation reaction 2 hours, be cooled to 75-80 ℃ and add 30g, methyl ethyl ketoxime, continue to react 1 hour, add remaining 300g epoxy resin, in 60-75 ℃ C was kept for 30 minutes, and the temperature was lowered to obtain a light yellow viscous modified epoxy resin.

[0062] B. Preparation of high-efficiency emulsifier

[0063] 200g polyether is added to the reactor with heating, reflux, stirring devices, feed nitrogen and stir, be heated to 70-80 DEG C and drip 75g octamethylcyclotetrasiloxane, react after 4 hours , add 280g epoxy resi...

Embodiment 3

[0072] The preparation of embodiment 3 glycidylamine type one-component waterborne epoxy emulsion

[0073] A. Synthesis of Glycidylamine Modified Epoxy Resin

[0074] 240g polyethylene glycol 1000 was added to the reactor, heated to 120-125 ° C, stirred to fully dissolve, vacuum dehydration 30min, then cooled to 75-80, added 50g toluene diisocyanate, insulation reaction 3 hours, added 280g glycidylamine type epoxy resin, be warming up to 100-105 ℃ of insulation reaction 2 hours, be cooled to 75-80 ℃ and add 23g caprolactam, continue to react 1 hour, add remaining 300g glycidylamine type epoxy resin, in 60 -75°C for 30min, cooling to obtain light yellow viscous modified epoxy resin.

[0075] B. Preparation of high-efficiency emulsifier

[0076] 200g polyether is added in the reactor with heating, reflux, stirring etc., feed nitrogen and stir, be heated to be warming up to 70-80 ℃ and drip 67g tetramethyldihydrodisiloxane, reaction 4 After hour, add 262g epoxy resin, be warmi...

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Abstract

The invention discloses a single-component water-based epoxy resin emulsion, which comprises the following components in percentage by weight: 100 percent of a modified epoxy resin, 5-35 percent of an efficient emulsifier, 0-1 percent of a surfactant, 0-70 percent of a cosolvent and an appropriate amount of water, wherein the modified epoxy resin comprises an epoxy resin, polyglycol ether, isocyanate, a sealing agent and a catalyst; the efficient emulsifier consists of an epoxy resin, polyether, organic silicon and a catalyst; the surfactant is one or a mixture of more than two of sodium dodecylbenzene sulfonate, sodium lauryl sulfate and potassium dodecyl sulfate; the cosolvent is one or a mixture of more than two of propylene glycol methyl ether, glycol ethylene ether, ethylene glycol monomethyl ether and diacetone; the sealing agent is one or a mixture of more than two of caprolactam, phenol and methyl ethyl ketoxime; and the catalyst is one or a mixture of more than two of 2-ethyl-4-methylimidazole, triphenylphosphine, triphenylhydrogen phosphide or benzyl dimethylamine.

Description

technical field [0001] The invention relates to an aqueous epoxy resin emulsion and a preparation method thereof, in particular to a single-component aqueous epoxy resin emulsion and a preparation method thereof, belonging to the technology of chemical coatings. Background technique [0002] Epoxy resin is an important thermosetting resin variety. Because of its excellent physical and mechanical properties, electrical insulation properties, chemical corrosion resistance, heat resistance and adhesion properties, low shrinkage, high hardness and good wear resistance, it is currently It has been widely used in chemical, water conservancy, transportation, machinery, electronics, home appliances, automobiles and aerospace industries; coatings are one of the most widely used industries for epoxy resin. [0003] The anti-corrosion properties of coatings are mainly determined by the resins in the coatings. The difference in film-forming mechanism between epoxy water-based coatings ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08G18/80C08G18/58C08G18/48C08G81/00C08J3/03C09D175/08
Inventor 陈兆彬刘旭军王西民黄新武
Owner 上海富朗化工科技发展有限公司
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