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A kind of nonionic water-based epoxy resin emulsion and preparation method thereof

A water-based epoxy resin, epoxy resin technology, applied in epoxy resin coatings, coatings and other directions, can solve the problems of coating stability, poor water resistance, easy hydrolysis, etc., to increase controllability and safety, preparation Simple process and good emulsification effect

Active Publication Date: 2016-05-11
SHANGHAI KINGCOM CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It has been reported that the preparation methods of water-based epoxy resin emulsion mainly include ionic and non-ionic. The ionic type generally increases the hydrophilicity by adding organic acids or alkalis to neutralize and form salts. The disadvantage is that the water resistance is poor, and the presence of organic acids will make Metal bodies produce flash rust; in addition, when used together with alkaline pigments and fillers, it will affect the stability of the coating
The non-ionic type has the Chinese patent CN101205296A, which uses polyether diol and epoxy resin to react at a molar ratio of 1:1 to obtain a water-white solid emulsifier. This method uses boron trifluoride ether as a catalyst, and it meets moisture in the air. Immediately hydrolyzed, generating highly toxic hydrogen fluoride fumes when decomposed, which requires high production equipment and operation. US Patent USP5602193 uses carboxyl-terminated polyether and epoxy to introduce hydrophilic groups through esterification to prepare epoxy emulsifiers. The emulsifier The middle ester is easy to hydrolyze, which makes the epoxy resin emulsion prepared by it unstable

Method used

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  • A kind of nonionic water-based epoxy resin emulsion and preparation method thereof
  • A kind of nonionic water-based epoxy resin emulsion and preparation method thereof
  • A kind of nonionic water-based epoxy resin emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Prepare raw materials according to the following components and their mass percentages in the total materials:

[0046] Component mass percentage (wt.%)

[0047] E-5146%

[0048] Epoxy resin emulsifier 10%

[0049] Deionized water 40%

[0050] Dodecyl to tetradecyl glycidyl ether 4%

[0051] The epoxy resin emulsifier components and the mass percentage content of the components are as follows:

[0052] E-5112%

[0053] ED-200340%

[0054] Dodecyl to tetradecyl glycidyl ether 12%

[0055] Propylene glycol methyl ether 36%

[0056] In a reactor equipped with reflux, heating and stirring devices, put 40g amino-terminated polyether ED-2003 and 36g propylene glycol methyl ether solution, heat up to 60~70℃, drop 12g dodecyl to tetradecyl glycidyl ether, The 30min dripping is completed, and the temperature is controlled at 80~90℃ to react for 3h. After the reaction, the temperature is cooled to room temperature, 12g epoxy resin E-51 is added, and the temperature is controlled at 80~90℃ to re...

Embodiment 2

[0063] Prepare raw materials according to the following components and their mass percentages in the total materials:

[0064] Component mass percentage (wt.%)

[0065] E-4445%

[0066] Epoxy resin emulsifier 15%

[0067] Deionized water 35%

[0068] Butyl glycidyl ether 5%

[0069] The epoxy resin emulsifier components and the mass percentage content of the components are as follows:

[0070] E-4420%

[0071] ED-90030%

[0072] Butyl glycidyl ether 13%

[0073] Propylene glycol methyl ether 37%

[0074] In a reactor equipped with reflux, heating and stirring devices, put in 30g amino-terminated polyether ED-900 and 37g propylene glycol methyl ether solution, heat up to 65~75℃ and add 13g butyl glycidyl ether dropwise, 30min drop completion, The temperature is controlled at 80~90℃ to react for 3h. After the reaction, the temperature is reduced to room temperature. 20g epoxy resin E-44 is added, and the temperature is controlled at 80~90℃ to react for 3h to obtain a waterborne epoxy resin emu...

Embodiment 3

[0081] Prepare raw materials according to the following components and their mass percentages in the total materials:

[0082] Component mass percentage (wt.%)

[0083] E-5167%

[0084] Epoxy resin emulsifier 16%

[0085] Deionized water 17%

[0086] Epoxy thinner 0%

[0087] The epoxy resin emulsifier components and the mass percentage content of the components are as follows:

[0088] E-5126%

[0089] ED-60030%

[0090] Butyl glycidyl ether 19%

[0091] Propylene glycol methyl ether 25%

[0092] In a reactor equipped with reflux, heating and stirring devices, put 30g amino-terminated polyether ED-600 and 25g propylene glycol methyl ether solution, heat up to 65~75℃, add 19g butyl glycidyl ether dropwise, 30min drop completion, And the temperature is controlled at 80~90℃ to react for 3h, after the reaction, the temperature is cooled to room temperature, 26g epoxy resin is added, and the temperature is controlled at 80~90℃ to react for 3h to obtain the waterborne epoxy resin emulsifier.

[00...

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Abstract

The invention discloses a nonionic type waterborne epoxy resin emulsion, which is mainly prepared from the following materials by weight: 40%-80% of epoxy resin, 8%-16% of an epoxy resin emulsifier, 10%-50% of deionized water and 0%-5% of an epoxy diluent, wherein the epoxy resin emulsifier mainly consists of the following materials by mass percentage: 10%-30% of epoxy resin, 30%-60% of amino-terminated polyoxypropylene, 10%-20% of a monoepoxy compound and 10%-50% of an organic solvent. The emulsifier provided by the invention is prepared from epoxy resin, amino-terminated polyoxypropylene and monoepoxy compound by reaction; the end group of epoxy group can participate in a curing film forming reaction, and has little effect on the properties of the paint film; a hydrophobic side chain is connected to the middle; therefore, the emulsion has the function of a surface active agent and the advantages of good emulsification effect and low viscosity. The preparation method provided by the invention adopts reaction of epoxy group and amino group, has low reaction temperature and simple preparation process, and does not need catalyst.

Description

Technical field [0001] The invention relates to the technical field of chemical coatings, in particular to a non-ionic aqueous epoxy resin emulsion and a preparation method thereof. Background technique [0002] Epoxy resin has the advantages of high strength, strong permeability, chemical corrosion resistance, etc., and is widely used in the field of industrial coatings. In recent years, with people's increasingly urgent and strict requirements for environmental protection, the development of environmentally friendly waterborne epoxy resin systems and related coatings has become a new research direction. [0003] At present, it has been reported that the preparation methods of water-based epoxy resin emulsion mainly include ionic and non-ionic. The ionic type generally increases the hydrophilicity by adding organic acid or alkali to neutralize the salt. The disadvantage is that the water resistance is poor and the presence of organic acid will Metal body produces flash rust; in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/12C08J3/03C08G59/50C08G59/20
Inventor 吴泽明吴新华
Owner SHANGHAI KINGCOM CHEM
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