Preparation method of amide self-emulsifying water-borne epoxy resin curing agent

A technology of water-based epoxy resin and epoxy resin, which is applied in the preparation of self-emulsifying water-based epoxy resin curing agent, the field of amide-type self-emulsifying water-based epoxy resin curing agent and its preparation, and can solve the problem of the hydrophilicity of triethylenetetramine Insufficient, limited application and other problems, to achieve the effect of high economy, low reaction temperature and high cross-linking density

Active Publication Date: 2015-04-29
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of hydrophilicity of the introduced triethylenetetramine, organic acids must be added to neutralize and form salts to increase hydrophilicity, which limits its application in high-alkaline environments and anti-rust fields

Method used

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  • Preparation method of amide self-emulsifying water-borne epoxy resin curing agent
  • Preparation method of amide self-emulsifying water-borne epoxy resin curing agent
  • Preparation method of amide self-emulsifying water-borne epoxy resin curing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0028] a. Add 103.2g diethylenetriamine and 28.4g methanol to the reactor equipped with heating device, reflux condensing device, constant pressure dropping funnel and stirring device, add 86.1g methyl acrylate dropwise at 25°C, dropwise Stir and add dropwise for 30 minutes. After the dropwise addition, continue to react at 25°C for 6h; then react at 70°C for 12h.

[0029] b. Add 184.0g of liquid epoxy resin E51 dropwise directly to the reactor in step a at 70°C, and stir while dripping. The dropwise addition time is 60min. After the dropwise addition, continue to react at 70°C for 2h; then at 75°C Evaporate methanol under normal pressure, and finally add 511.9 g of deionized water at 75°C and mix evenly so that the solid content is 40%, which is the amide type self-emulsifying water-based epoxy resin curing agent 1.

Embodiment 2

[0031] a. Add 146.2g triethylenetetramine and 45.6g methanol to the reactor equipped with heating device, reflux condensing device, constant pressure dropping funnel and stirring device, add 82.0g methyl acrylate dropwise at 28°C, dropwise Stirring, the dropwise addition time is 45min, continue to react at 28°C for 5h after the dropwise addition is completed; then react at 65°C for 18h.

[0032] b. Add 222.0g of liquid epoxy resin E51 dropwise directly to the reactor in step a at 65°C, and stir while dripping. The dropping time is 80min. After the dropwise addition, continue to react at 65°C for 3h; then, at 65°C Evaporate methanol under normal pressure, and finally add 419.7g deionized water at 65°C and mix evenly so that the solid content is 50%, which is the amide type self-emulsifying water-based epoxy resin curing agent 2.

Embodiment 3

[0034] a. Add 189.3g of tetraethylenepentamine and 80.3g of methanol to the reactor equipped with heating device, reflux condensing device, constant pressure dropping funnel and stirring device, add 77.5g of methyl acrylate dropwise at 30°C, dropwise Stir and add dropwise for 60 minutes. After the dropwise addition, continue to react at 30°C for 4h; then react at 60°C for 24h.

[0035] b. Add 294.0g of liquid epoxy resin E51 dropwise directly to the reactor in step a at 60°C, and stir while dropping. Distill methanol out under normal pressure, and finally add 354.6g of deionized water at 70°C and mix evenly so that the solid content is 60%, which is the amide type self-emulsifying water-based epoxy resin curing agent 3.

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Abstract

The invention provides a preparation method of an amide self-emulsifying water-borne epoxy resin curing agent. The preparation method comprises the steps of synthesis of an acylamino polyamine long chain, synthesis of a self-emulsifying water-borne epoxy resin curing agent and the like. The molecular structure of the amide self-emulsifying water-borne epoxy resin curing agent prepared through the preparation method contains both a hydrophilic acylamino polyamine long chain structure and an oleophilic bisphenol A resin structure, but does not contain polyether long chains or organic acids; the acylamino polyamine long chain structure enables a paint film to be good in the performances of flexibility, resistance to acid and base, and the like, and the water resistance of the paint film is improved and the application field of water-borne epoxy resin is widened since the polyether long chains and organic acids are not contained; moreover, the crosslinking density of the paint film is high, and the paint film is extremely high in pencil hardness by virtue of the polyamine structure.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to a preparation method of a self-emulsifying water-based epoxy resin curing agent, in particular to an amide-type self-emulsifying water-based epoxy resin curing agent and a preparation method thereof. Background technique [0002] Self-emulsifying water-based epoxy resin curing agent is more and more favored by people because of its low V°C content, low odor, safe use and water cleaning. Its biggest feature is that it does not need to prepare epoxy resin emulsion in advance. There is no problem of storage stability of the emulsion, and at the same time, it has relatively good film-forming properties. At present, the general method for preparing self-emulsifying waterborne epoxy resin curing agent is to introduce hydrophilic polyether chain ends or cationic groups on the lipophilic low molecular weight epoxy resin, and at the same time introduce a polyamine structure that can react ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/54
Inventor 尹浩孙德文杨冲李波刘玉亭万赟冉千平刘加平
Owner JIANGSU SOBUTE NEW MATERIALS
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