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Preparation method of high-performance waterborne epoxy curing agent

A water-based epoxy and curing agent technology, applied in the direction of epoxy resin coatings, coatings, etc., to achieve high hardness, high cross-linking density, and good environmental performance

Inactive Publication Date: 2014-06-25
全洪晖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, compared with the oily epoxy curing system, the water-based epoxy curing system has a lower surface gloss and cannot replace the decorative application of the oily epoxy curing system, such as high gloss floor paints, high-gloss stone or concrete decorative coatings

Method used

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  • Preparation method of high-performance waterborne epoxy curing agent
  • Preparation method of high-performance waterborne epoxy curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 1mol of M2070 and add it to a beaker with a constant temperature water bath, and add 2mol of liquid epoxy resin DER331, start the stirrer, set the speed at 600-1000 rpm, heat up to 70 degrees Celsius while stirring, and keep it for 3 hours to get a viscous 1mol of intermediate A, continue to stir, quickly add 2mol of polyetheramine T403 at one time, for exothermic reaction, turn on the cold water cooling water bath, control the temperature of the reactant below 80 degrees Celsius, mix for 120 minutes, and the reaction product is clear, transparent and viscous Liquid, add 10% nonylphenol, 8% benzyl alcohol, 4% AEP, and finally add 50% deionized water according to the weight ratio of the reactants, and mix well to obtain the final product water-based epoxy curing agent. Take 60-70 After mixing 100 parts of this product with 100 parts of standard liquid epoxy resin DER331, the liquid epoxy resin can be directly emulsified into a white emulsion, and the cured coating fi...

Embodiment 2

[0030] Take 0.5 mol of ED2003 and add it into a beaker with a constant temperature water bath to melt, and add 2 mol of liquid epoxy resin DER331, start the stirrer, set the speed at 600-1000 rpm, heat up to 70 degrees Celsius while stirring, and keep it for 3 hours to obtain a viscous Thick 1mol intermediate B, continue to stir, quickly add 1mol polyetheramine T403 and 1mol polyetheramine D230 at one time, for exothermic reaction, turn on the cold water cooling water bath, control the temperature of the reactant below 80 degrees Celsius, mix for 120 minutes, and get The reaction product is a clear, transparent and viscous liquid. According to the weight ratio of the reactants, 10% nonylphenol, 8% benzyl alcohol, 4% AEP, and finally 50% deionized water are added, and the final product is obtained. Oxygen curing agent, after mixing 60-70 parts of this product with 100 parts of standard liquid epoxy resin DER331, the liquid epoxy resin can be directly emulsified into a white emul...

Embodiment 3

[0032] Take 0.5 mol of ED900 and add it to a beaker with a constant temperature water bath to melt, and add 2 mol of liquid epoxy resin DER331, start the stirrer, set the speed at 600-1000 rpm, heat up to 70 degrees Celsius while stirring, and keep it for 3 hours to obtain a viscous Thick 1mol intermediate B, continue to stir, quickly add 2mol vinylamine DETA at one time, for exothermic reaction, turn on the cold water cooling water bath, control the temperature of the reactant below 80 degrees Celsius, mix for 120 minutes, and the reaction product is clear, transparent and viscous The liquid of adding 10% nonylphenol, 8% salicylic acid by reactant weight ratio, 4% AEP, finally adding 50% deionized water, mix uniformly, obtain final product water-based epoxy curing agent, take 60% - After mixing 70 parts of this product with 100 parts of standard liquid epoxy resin DER331, the liquid epoxy resin can be directly emulsified into a white emulsion, and the cured coating film is har...

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Abstract

The invention discloses a preparation method of a high-performance waterborne epoxy curing agent. The preparation method comprises the following steps: allowing an amine containing an EO hydrophilic chain segment or an EO and PO hybrid hydrophilic chain segment to have a condensation reaction with standard liquid epoxy resin to obtain an intermediate containing a hydrophilic side chain, letting the intermediate have the condensation reaction with polyamine to obtain a final reaction product which is polyamine containing a hydrophilic side chain EO / PO structure and an oleophylic bisphenol A structure, adding an accelerator and diluting by use of deionized water to obtain a waterborne epoxy curing agent product. The preparation method disclosed by the invention is simple, the prepared waterborne epoxy curing agent is stable in performance and can be used for directly emulsifying the liquid epoxy resin, and a high-glossiness coating surface can be obtained after the waterborne epoxy curing agent and the epoxy resin are cross-linked and cured, so that a huge potential market is provided for the application of a waterborne epoxy coating to a surface decorative coating.

Description

Technical field: [0001] The invention relates to a high-performance water-based epoxy curing agent and a preparation method thereof. Background technique: [0002] Due to the pressure of environmental protection, modern water-based resin materials are increasingly used in coatings, inks and adhesives to replace traditional oil-based resin materials. The water-based epoxy resin and curing agent system refers to the stable dispersion system obtained by emulsifying and dispersing the epoxy resin in the form of particles or droplets in the dispersion medium with water as the continuous phase after the epoxy resin is mixed with a water-based curing agent. Since the epoxy resin is a thermosetting resin with a linear structure, a water-based epoxy curing agent must be added before construction, and a chemical crosslinking reaction occurs at room temperature. It forms an insoluble and infusible space network structure, showing excellent performance. The many advantages of water-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50C09D163/00
Inventor 全洪晖
Owner 全洪晖
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