Nonionic type waterborne epoxy resin emulsion and preparation method thereof

A water-based epoxy resin, epoxy resin technology, applied in epoxy resin coatings, coatings, etc., can solve the problems of coating stability, poor water resistance, flash rust of metal bodies, etc., to increase controllability and safety. , The preparation process is simple, and the emulsification effect is good.

Active Publication Date: 2014-06-04
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 adopts polyether glycol and epoxy resin to react with 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 It is hydrolyzed immediately, and highly toxic hydrogen fluoride fumes are generated when decomposed, which requires high production equipment and operation. USP5602193 uses carboxyl-terminated polyether and epoxy to introduce hydrophilic groups through esterification to prepare epoxy emulsifiers. The middle ester is easy to hydrolyze, which makes the epoxy resin emulsion prepared by it unstable

Method used

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  • Nonionic type waterborne epoxy resin emulsion and preparation method thereof
  • Nonionic type waterborne epoxy resin emulsion and preparation method thereof
  • Nonionic type waterborne 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 material:

[0046] Component Mass percent (wt.%)

[0047] E-51 46%

[0048] Epoxy resin emulsifier 10%

[0049] Deionized water 40%

[0050] Lauryl to Myristyl Glycidyl Ether 4%

[0051] Wherein said epoxy resin emulsifier component and component mass percent content are as follows:

[0052] E-51 12%

[0053] ED-2003 40%

[0054] Lauryl to Myristyl Glycidyl Ether 12%

[0055] Propylene Glycol Methyl Ether 36%

[0056] In a reactor equipped with reflux, heating and stirring devices, put 40g of amino-terminated polyether ED-2003 and 36g of propylene glycol methyl ether solution, raise the temperature to 60~70°C and add 12g of dodecyl to tetradecyl glycidyl ether dropwise, The dropwise addition was completed in 30 minutes, and the temperature was controlled at 80-90°C for 3 hours. After the reaction, the temperature was lowered to room temperature, 12g of epoxy resin...

Embodiment 2

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

[0064] Component Mass percent (wt.%)

[0065] E-44 45%

[0066] Epoxy emulsifier 15%

[0067] Deionized water 35%

[0068] Butyl glycidyl ether 5%

[0069] Wherein said epoxy resin emulsifier component and component mass percent content are as follows:

[0070] E-44 20%

[0071] ED-900 30%

[0072] Butyl glycidyl ether 13%

[0073] Propylene Glycol Methyl Ether 37%

[0074] In a reactor equipped with reflux, heating and stirring devices, put 30g of amino-terminated polyether ED-900 and 37g of propylene glycol methyl ether solution, raise the temperature to 65~75°C and add 13g of butyl glycidyl ether dropwise, and the dropwise addition is completed in 30 minutes. And control the temperature at 80-90°C for 3 hours, cool down to room temperature after the reaction, add 20g of epoxy resin E-44, and control the temperature at 80-90°C for 3 hours to obtain ...

Embodiment 3

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

[0082] Component Mass percent (wt.%)

[0083] E-51 67%

[0084] Emulsifier for epoxy resin 16%

[0085] Deionized water 17%

[0086] Epoxy Thinner 0%

[0087] Wherein said epoxy resin emulsifier component and component mass percent content are as follows:

[0088] E-51 26%

[0089] ED-600 30%

[0090] Butyl glycidyl ether 19%

[0091] Propylene Glycol Methyl Ether 25%

[0092] Put 30g of amino-terminated polyether ED-600 and 25g of propylene glycol methyl ether solution into the reactor equipped with reflux, heating and stirring devices, raise the temperature to 65~75°C and add 19g of butyl glycidyl ether dropwise, and the dropwise addition is completed in 30 minutes. And control the temperature at 80-90°C for 3 hours, cool down to room temperature after the reaction, add 26g of epoxy resin, and control the temperature at 80-90°C for 3 hours to obtain...

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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 nonionic water-based epoxy resin emulsion and a preparation method thereof. Background technique [0002] Epoxy resin has the advantages of high strength, strong permeability, and chemical corrosion resistance, and is widely used in the field of industrial coatings. In recent years, as people's requirements for environmental protection have become increasingly urgent and strict, the development of environmentally friendly waterborne epoxy resin systems and related coatings has become a new research direction. [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 pr...

Claims

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Application Information

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