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Aqueous epoxy emulsion prepared from emulsifying agent containing isocyanate diepoxy functional groups

A water-based epoxy emulsion and diepoxy functional technology, used in epoxy resin coatings, coatings, etc., can solve the problems affecting the water resistance and salt spray resistance of the coating film, weak epoxy group activity, and insufficient emulsifier reaction. and other problems, to achieve the effect of good emulsification effect, good stability, improved water resistance and salt spray resistance

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

At present, the common epoxy emulsifiers are mostly mono-epoxy or di-epoxy compounds, usually with large molecular weight, but the activity of epoxy groups is weaker than that of small molecule epoxy groups, resulting in insufficient emulsifier reaction, which affects the coating film. Water resistance and salt spray resistance

Method used

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  • Aqueous epoxy emulsion prepared from emulsifying agent containing isocyanate diepoxy functional groups
  • Aqueous epoxy emulsion prepared from emulsifying agent containing isocyanate diepoxy functional groups
  • Aqueous epoxy emulsion prepared from emulsifying agent containing isocyanate diepoxy functional groups

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Monoisocyanate polyoxyethylene monomethyl ether is made of the following raw materials in mass percentage:

[0029] 2,4-Toluene diisocyanate 20%

[0030] Polyethylene glycol monomethyl ether 80%

[0031] Mix 2,4-toluene diisocyanate and polyethylene glycol monomethyl ether, heat up to 100°C for 5 hours, and cool down to room temperature naturally to obtain monoisocyanate polyoxyethylene monomethyl ether.

[0032] (2) The emulsifier is made of the following raw materials in mass percentage:

[0033] Epoxy resin E51 25%

[0034] Monoisocyanate polyoxyethylene monomethyl ether 75%

[0035] Its preparation method is: mix epoxy resin E51 and monoisocyanate polyoxyethylene monomethyl ether, heat up to 80°C and react for 6 hours, and wait for natural cooling to room temperature to obtain the emulsifier.

[0036] (3) The water-based epoxy emulsion is made of the following raw materials in mass percentage:

[0037]

[0038] Mix epoxy resin E51, emulsifier, and propyl...

Embodiment 2

[0040] (1) Monoisocyanate polyoxyethylene monomethyl ether is made of the following raw materials in mass percentage:

[0041] 2,4-Toluene diisocyanate 25%

[0042] Polyethylene glycol monomethyl ether 75%

[0043] 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 polyoxyethylene monomethyl ether.

[0044] (2) The emulsifier is made of the following raw materials in mass percentage:

[0045] Epoxy 144 30%

[0046] Monoisocyanate polyoxyethylene monomethyl ether 70%

[0047] Its preparation method is: mix epoxy resin 144 and monoisocyanate polyoxyethylene monomethyl ether, heat up to 100°C and react for 5 hours, and wait for natural cooling to room temperature to obtain the emulsifier.

[0048] (3) The water-based epoxy emulsion is made of the following raw materials in mass percentage:

[0049]

[0050] Mix epoxy resin 144, emulsifier, and propylene gl...

Embodiment 3

[0052] (1) Monoisocyanate polyoxyethylene monomethyl ether is made of the following raw materials in mass percentage:

[0053] 2,4-Toluene diisocyanate 15%

[0054] Polyethylene glycol monomethyl ether 85%

[0055] Mix 2,4-toluene diisocyanate and polyethylene glycol monomethyl ether, heat up to 70°C for 6 hours, and cool down to room temperature naturally to obtain monoisocyanate polyoxyethylene monomethyl ether.

[0056] (2) The emulsifier is made of the following raw materials in mass percentage:

[0057] Epoxy resin E20 20%

[0058] Monoisocyanate polyoxyethylene monomethyl ether 80%

[0059] The preparation method is as follows: mix epoxy resin E20 and polyoxyethylene monomethyl ether monoisocyanate, heat up to 90°C and react for 4 hours, and cool naturally to room temperature to obtain the emulsifier.

[0060] (3) The water-based epoxy emulsion is made of the following raw materials in mass percentage:

[0061]

[0062] Mix epoxy resin E20, emulsifier, and propyl...

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Abstract

The invention discloses aqueous epoxy emulsion prepared from an emulsifying agent containing isocyanate diepoxy functional groups, relating to the technical field of aqueous epoxy emulsion. The aqueous epoxy emulsion is prepared from the following raw materials in percentage by weight: 40-65% of epoxy resin, 6-20% of an emulsifying agent, 0-12% of a solvent and 35-40% of deionized water. A reactive type epoxy emulsifying agent with a regular structure is utilized by the invention to prepare the aqueous epoxy resin emulsion through a phase reversion method; the emulsification effect and the stability are good; and the particle diameters of the emulsion are 0.6-1.8 microns.

Description

Technical field: [0001] The invention relates to the technical field of water-based epoxy emulsions, in particular to a water-based epoxy emulsion prepared from an emulsifier containing isocyanate diepoxy functional groups. 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. However, epoxy resin itself is insoluble in water and cannot be directly emulsified by adding water. It must introduce hydrophilic groups into its molecular chain or add hydrophilic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/09C08J3/03C08L63/00C08L75/08C08G18/76C08G18/58C08G18/48C09D163/00C09D7/12
CPCC08J3/03C08G18/283C08G18/58C08G18/7614C08J3/095C08J2363/00C08L63/00C09D163/00C08L75/08
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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