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Self-emulsifying type aqueous latex of epoxy hardener, and preparation method

A water-based epoxy and self-emulsifying technology, applied in the field of water-based epoxy curing agent and its preparation, can solve the problems of energy consumption, unfavorable safety production, and non-compliance with environmental protection requirements, and achieve the effect of improving water resistance and synthesis process.

Active Publication Date: 2009-12-16
GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curing agent prepared by this method improves its compatibility with epoxy resin and improves the physical properties and resistance of the coating. However, the synthesis process uses a high temperature of 200 ° C, which not only consumes energy, but also is not conducive to safety. production; on the other hand, because the latex particles of the curing agent emulsion contain toluene, a toxic organic solvent, it does not meet the requirements of environmental protection

Method used

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  • Self-emulsifying type aqueous latex of epoxy hardener, and preparation method

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Experimental program
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Effect test

Embodiment 1

[0037] Step 1, prepare materials according to the following components and their mass percentages in the total material:

[0038] Component Mass %

[0039] Base Amine: Isophoronediamine 10.5%

[0040] Epoxy resin: 6420 25.7%

[0041] Epoxy terminated polyether: E-220 7.2%

[0042] Epoxy Reactive Diluent: Phenyl Glycidyl Ether 16.6%

[0043] Deionized water 40%

[0044] Step 2: Preparation of Curing Agent Emulsion

[0045] (1) Put the metered isophorone diamine into the reactor as described in step 1, and raise the temperature of the system to 80° C. after stirring;

[0046] (2) Add the metered 6420 epoxy resin and E-220 compatible mixture to the reactor within 30 to 90 minutes as described in step 1, and continue the constant temperature reaction for 3 hours after the addition is completed;

[0047] (3) Add the metered phenyl glycidyl ether dropwise into the reactor within 30 to 90 minutes as described in step 1, and continue the constant temperature reaction for 2 hours...

Embodiment 2

[0051] Step 1, prepare materials according to the following components and their mass percentages in the total material:

[0052] Component Mass %

[0053] Basic Amine: Diaminodiphenylmethane 12.8%

[0054] Epoxy resin: E-51 16.5%

[0055] Epoxy terminated polyether: XR-19 4.2%

[0056] Epoxy reactive diluent: o-cresol glycidyl ether 16.5%

[0057] Deionized water 50%

[0058] Step 2: Preparation of Curing Agent Emulsion

[0059] (1) Put the metered diaminodiphenylmethane into the reactor as described in step 1, and raise the temperature of the system to 70° C. and then keep the temperature constant while stirring;

[0060] (2) Add the metered E-51 and XR-19 compatible mixture to the reactor dropwise within 30 to 90 minutes as described in step 1, and continue the constant temperature reaction for 4 hours after the dropwise addition is completed;

[0061] (3) Add the metered o-cresol glycidyl ether dropwise into the reactor within 30 to 90 minutes as described in step 1,...

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Abstract

This invention relates to a method for preparing self-emulsifying waterborne epoxy curing agent emulsion, which is composed of: primary amine 7-20 wt.%, epoxy resin 12-27 wt.%, epoxy-terminated polyether 3-8 wt.%, epoxy active diluter 10-30 wt.%, and deionized water 35-60 wt.%. The method comprises: adding primary amine into a reactor, slowly dropping a mixture of epoxy resin and epoxy-terminated polyether, reacting at a certain temperature, slowly dropping monofunctional epoxy active diluter, reacting, adding water, and emulsifying to obtain white waterborne epoxy curing agent emulsion. The method has such advantages as simple process, low reaction temperature (below 100 deg.C), high safety and low energy consumption. The obtained waterborne epoxy curing agent emulsion has such advantages as low VOC content, high stability, high water resistance, high compatibility with epoxy resin, high impact resistance, good luster, high toughness and high adhesiveness, and can be used in paint, adhesive and polymer concrete.

Description

Technical field: [0001] The invention relates to a water-based epoxy curing agent and its preparation technology, in particular to a self-emulsifying water-based epoxy curing agent emulsion without additional emulsifier and its preparation technology. technical background: [0002] For more than half a century, epoxy resin has been used in many fields such as coatings, composite materials, casting materials, adhesives, molding materials and injection molding materials due to its excellent mechanical properties, adhesive properties, electrical insulation properties, processability and corrosion resistance. Has been widely used. In the application of epoxy resin, the curing agent occupies a very important position. However, most of the traditional curing agents are solvent-based systems, which not only consume a large amount of solvents, waste resources, but also pose an increasingly serious threat to the natural environment on which animals and plants depend. Therefore, for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/40C08L63/00C08J3/03C08K5/17C08L71/00
Inventor 孙再武王秋娣周子鹄李赉周
Owner GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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