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Aqueous epoxy resin emulsion synthesized with mono-isocyanate polyoxyethylene monomethyl ether monomers

A technology of polyoxyethylene monomethyl ether and monoisocyanate, which is applied in the field of water-based epoxy emulsion, and can solve the problems of difficult control of the preparation steps and high preparation cost of the chemical modification method

Inactive Publication Date: 2017-09-22
安徽艾珀希德化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the size of the dispersed phase particles in the water-based epoxy resin emulsion prepared by the chemical method is very small, about tens to hundreds of nanometers, but the preparation steps of the chemical modification method are not easy to control, and the product preparation cost is high

Method used

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  • Aqueous epoxy resin emulsion synthesized with mono-isocyanate polyoxyethylene monomethyl ether monomers
  • Aqueous epoxy resin emulsion synthesized with mono-isocyanate polyoxyethylene monomethyl ether monomers
  • Aqueous epoxy resin emulsion synthesized with mono-isocyanate polyoxyethylene monomethyl ether monomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) The water-based epoxy grease emulsion is made of the following raw materials in mass percentage:

[0024]

[0025] Raise the temperature of the mixture of epoxy resin E20 and linoleic acid to 200°C for esterification until the acid value is 3-20, cool down to 120°C, vacuum dehydrate to reduce the mass water content in the resin to below 0.1%, and continue to cool down to 70°C ℃, then add monoisocyanate polyoxyethylene monomethyl ether, keep the temperature for 5 hours, and add deionized water dropwise after the reaction until the phase is reversed to obtain a stable emulsion.

[0026] (2) Monoisocyanate polyoxyethylene monomethyl ether is made of the following raw materials in mass percentage:

[0027] 2,4-Toluene diisocyanate 20%

[0028] Polyethylene glycol monomethyl ether 80%

[0029] Mix 2,4-toluene diisocyanate and polyethylene glycol monomethyl ether, heat up to 80°C for 6 hours, and cool down to room temperature naturally to obtain monoisocyanate polyox...

Embodiment 2

[0031] (1) The water-based epoxy grease emulsion is made of the following raw materials in mass percentage:

[0032]

[0033] Heat up the mixture of epoxy resin 604, linoleic acid, soybean oil and xylene solvent to 180°C for esterification until the acid value is 3-20, cool down to 100°C, vacuum remove xylene and water, so that the mass in the resin contains Reduce the water content to below 0.1%, continue to cool down to 85°C, then add monoisocyanate polyoxyethylene monomethyl ether, and keep it warm for 4 hours. After the reaction, add deionized water dropwise until the phase is reversed to obtain a stable emulsion.

[0034] (2) Monoisocyanate polyoxyethylene monomethyl ether is made of the following raw materials in mass percentage:

[0035] 2,4-Toluene diisocyanate 15%

[0036] Polyethylene glycol monomethyl ether 85%

[0037] Mix 2,4-toluene diisocyanate and polyethylene glycol monomethyl ether, heat up to 100°C for 5 hours, and cool down to room temperature naturall...

Embodiment 3

[0039] (1) The water-based epoxy grease emulsion is made of the following raw materials in mass percentage:

[0040]

[0041] Heat up the mixture of epoxy resin E20, oleic acid, soybean oil and xylene solvent to 220°C to esterify to an acid value of 3-20, cool down to 120°C, remove xylene and water in a vacuum to reduce the mass water content in the resin Reduce to below 0.1%, continue to cool down to 80°C, then add monoisocyanate polyoxyethylene monomethyl ether, keep warm for 4 hours, add deionized water dropwise after the reaction, until the phase is reversed to obtain a stable emulsion.

[0042] (2) Monoisocyanate polyoxyethylene monomethyl ether is made of the following raw materials in mass percentage:

[0043] 2,4-Toluene diisocyanate 15%

[0044] Polyethylene glycol monomethyl ether 85%

[0045] Mix 2,4-toluene diisocyanate and polyethylene glycol monomethyl ether, heat up to 90°C for 5 hours, and cool down to room temperature naturally to obtain monoisocyanate po...

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Abstract

The invention discloses aqueous epoxy resin emulsion synthesized with mono-isocyanate polyoxyethylene monomethyl ether monomers, relating to the technical field of aqueous epoxy resin emulsion. The aqueous epoxy resin emulsion is prepared from the following raw materials in percentage by mass: 20-30% of epoxy resin, 20-28% of oleic acid, 5-15% of mono-isocyanate polyoxyethylene monomethyl ether, 0-10% of xylene and 35-55% of deionized water. The aqueous epoxy resin emulsion prepared by the invention is low in acid value, difficult to hydrolyze and good in quality stability; the particle diameters of the emulsion are 0.6-1.8 microns; and the water resistance and salt fog resistance of a formed paint film are better than the water resistance and salt fog resistance of the aqueous epoxy resin emulsion which is neutralized by utilizing amine; and the initial drying is good, and the VOC (volatile organic compound) content is lower than that of the aqueous epoxy resin emulsion neutralized by utilizing the amine.

Description

Technical field: [0001] The invention relates to the technical field of water-based epoxy emulsion, in particular to a water-based epoxy emulsion synthesized from monoisocyanate polyoxyethylene monomethyl ether monomer. Background technique: [0002] Epoxy resin has the advantages of good adhesion, low curing shrinkage, high mechanical strength, good corrosion resistance and solvent resistance, and is widely used in chemical, electrical, construction, aviation and other fields. Traditional epoxy resins are mostly solvent-based epoxy resins. The use of solvents will produce a large amount of volatile organic compounds, which will pollute the environment and cause adverse effects on human health. As an environment-friendly product, waterborne epoxy resin has attracted more and more attention. Epoxy resin has the characteristics of epoxy and alkyd, and its performance is better than that of alkyd resin. However, epoxy resin itself is insoluble in water and cannot be directly e...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/48C08G18/58C08G59/16C09D175/08
CPCC08G18/7614C08G18/283C08G18/581C08G59/1472C09D175/08
Inventor 刘晓非杜则冰
Owner 安徽艾珀希德化工科技有限公司
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