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Waterborne epoxy curing agent and preparation method thereof

A technology of water-based epoxy and curing agent, which is applied in the field of epoxy resin, can solve the problems of not being able to reach the solvent-free environmental protection system, and achieve the effect of excellent water solubility

Pending Publication Date: 2020-09-01
WUXI DAHE POLYMER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, it is a technical line to emulsify epoxy resin to make water-based epoxy, and then form a reaction system with a general curing agent. During the emulsification process of epoxy resin, more or less co-solvents are added to achieve the desired effect. To a true solvent-free environmental protection system

Method used

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Examples

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Embodiment Construction

[0013] The present application is described in detail below in conjunction with the examples, but the present application is not limited to these examples.

[0014] Unless otherwise specified, the epoxy resin raw materials in the examples of the present application were purchased through commercial channels. Formulation and application:

[0015] Emulsifier: aliphatic polyamine=1:1.2~1.3, synthesized at about 60±15°C, add water to form an aqueous solution.

[0016] The reactive emulsifier is sodium acrylamide isopropyl sulfonate plus polyacrylamide fatty alcohol polyoxyethylene ether weight ratio: 30-70~70-30;

[0017] The curing agent of the present invention (solid content without water): epoxy resin is 100:100~150.

[0018] According to another aspect of the present application, also provide a kind of preparation method of waterborne epoxy curing agent, comprise the following steps at least:

[0019] In the preparation method of the water-based epoxy curing agent provided...

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Abstract

The waterborne epoxy curing agent adopts a mixed emulsifier, and the emulsifier has a hydrophilic group and an oleophylic group; carrying out synthetic reaction on the mixed emulsifier and an aliphatic amine curing agent, and adding water to prepare a water-based curing agent; the reactive emulsifier is a mixture of sodium acrylamido isopropyl sulfonate and polyacrylamide fatty alcohol-polyoxyethylene ether, and the weight ratio of the sodium acrylamido isopropyl sulfonate to the polyacrylamide fatty alcohol-polyoxyethylene ether is 30-70 to 70-30; and aliphatic polyamine in the aliphatic amine curing agent comprises at least one of ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine and diethylaminopropylamine. The novelty of the curing agent is that the curingagent can react with pure bisphenol A epoxy resin or flexible epoxy resin, and does not need to be matched with water-based epoxy resin for use, so that 1.5-5% of cosolvent contained in the water-based epoxy resin is avoided, and the curing agent can be truly green in production and application).

Description

technical field [0001] The invention relates to a water-based epoxy curing agent and its preparation method and application, belonging to the technical field of epoxy resins. Background technique [0002] Solvent-free polymer materials are the development direction of the industry; the synthesis and curing method of CN2016111495774 authorized by the applicant for solvent-free high Tg liquid phosphorus-containing epoxy resin is also reflected in this direction; the applicant is mass production of epoxy resin Business; Epoxy resin has been widely used in industrial production fields such as coatings, advanced composite materials, engineering plastics, electronic and electrical materials due to its excellent adhesion, electrical insulation, thermal stability and mechanical properties. Waterborne epoxy curing agent is an important part of the waterborne epoxy system, and its composition and structure play a decisive role in the physical and chemical properties of the coating fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50
CPCC08G59/504
Inventor 陈子方张士鸣徐达洋袁浩凌陈永东
Owner WUXI DAHE POLYMER MATERIALS
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