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Solvent-free waterborne epoxy curing agent and preparation method thereof

A water-based epoxy and curing agent technology, applied in epoxy resin coatings, coatings, etc., can solve the problems of low solid content and high energy consumption in the preparation of water-based epoxy curing agents, achieve high gloss, break through high solid and low viscosity Difficult, low-odor effects

Active Publication Date: 2020-06-26
深圳前海飞扬化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is the problem of high energy consumption and low solid content in the preparation of traditional water-based epoxy curing agents, providing a high-performance, low-viscosity solvent-free self-emulsifying epoxy curing agent and its preparation method

Method used

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  • Solvent-free waterborne epoxy curing agent and preparation method thereof
  • Solvent-free waterborne epoxy curing agent and preparation method thereof
  • Solvent-free waterborne epoxy curing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] 1. Under the protection of nitrogen, add 20.6g of diethylenetriamine into the four-neck flask, start stirring, slowly add 200g of MPEGA (1000) dropwise at room temperature, and continue the reaction at room temperature for 4-8 hours after the dropwise addition.

[0046] 2. Under the protection of nitrogen, add 20.6g of diethylenetriamine into the four-necked flask, start stirring, slowly add 26g of n-butyl glycidyl ether dropwise at room temperature, and continue the reaction at room temperature for 4-8 hours after the drop is completed.

[0047] 3. Pour the above materials into a 500ml flask, start stirring and stir evenly, and slowly add 39.6g of ethylene glycol dimethacrylate dropwise, and continue to react at room temperature for 4-8 hours after the dropping, and the reaction end point is determined by chromatography and amine value .

Embodiment 2

[0049] 1. Under the protection of nitrogen, add 47.3g of triethylenetetramine into the four-neck flask, start stirring, slowly add 90.9g of MPEGA (350) dropwise at room temperature, and continue the reaction at room temperature for 4-8 hours after the dropwise addition.

[0050] 2. Under the protection of nitrogen, add 47.3g of triethylenetetramine into the four-neck flask, start stirring, slowly add 48.6g of tertiary carbonic acid glycidyl ether dropwise at room temperature, and continue the reaction at room temperature for 4-8 hours after dropping.

[0051] 3. Pour the above materials into a 500ml flask, turn on the stirring and stir evenly, and slowly add 68.2g of tripropylene glycol diacrylate dropwise, and continue to react at room temperature for 4-8 hours after the dropping, and the reaction end point is determined by chromatography and amine value.

Embodiment 3

[0053] 1. Under the protection of nitrogen, add 34.1g of triethylenetetramine into the four-necked flask, start stirring, slowly add 164g of MPEGA (1000) dropwise at room temperature, and continue the reaction at room temperature for 4-8 hours after the dropwise addition.

[0054] 2. Under the protection of nitrogen, add 34.1g of triethylenetetramine into the four-necked flask, start stirring, and slowly add 35.8g of tertiary carbonic acid glycidyl ether dropwise at room temperature, and continue the reaction at room temperature for 4-8 hours after the dropping.

[0055] 3. Pour the above materials into a 500ml flask, turn on the stirring and stir evenly, and slowly add 32.5g of ethylene glycol dimethacrylate dropwise, and continue to react at room temperature for 4-8 hours after the dropping, and the reaction end point is determined by chromatography and amine value .

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Abstract

The invention discloses a solvent-free waterborne epoxy curing agent and a preparation method thereof, and relates to the technical field of epoxy curing agents. According to the solvent-free waterborne epoxy curing agent disclosed by the invention, a hydrophilic group and an oleophylic group are introduced through a molecular structure design, and the HLB value is well balanced by controlling thelengths of the hydrophilic group and the oleophylic group, so that the solvent-free self-emulsifying epoxy curing agent with high performance and low viscosity is obtained. According to the invention, an acrylate and amine Michael addition method is adopted, the structural arrangement is standard, and a rapid reaction can be carried out at medium and low temperatures, so that a high-solid low-viscosity product is obtained.

Description

technical field [0001] The invention relates to the technical field of epoxy curing agents, in particular to a solvent-free water-based epoxy curing agent and a preparation method thereof. Background technique [0002] Epoxy resin has excellent adhesion, insulation, anti-corrosion and chemical resistance due to its unique epoxy group in structure, and has become one of the most representative and largest high-performance anti-corrosion coating resin varieties. Curing agent is an indispensable component of epoxy resin. With the increasingly stringent environmental protection in my country, water-based coatings have received more and more attention. At present, the preparation and production of domestic water-based epoxy curing agents often need to be heated to a relatively high temperature, which not only consumes a lot of energy, but also has a relatively high molecular weight, resulting in a darker hue and higher viscosity. In order to overcome this defect, R&D personnel u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50C09D163/00
CPCC08G59/504C09D163/00
Inventor 龙绪俭徐涛熊东路肖增钧易松杨轩
Owner 深圳前海飞扬化工有限公司
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