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Non-ionic self-emulsifying aqueous epoxy hardener and preparation method and application thereof

A water-based epoxy, non-ionic technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., can solve the problem of poor leveling effect of water-based coatings, poor self-emulsification effect, curing agent Problems such as large molecular weight, to achieve good flexibility and surface activity, good emulsifying effect, and good emulsifying effect

Inactive Publication Date: 2010-01-13
GUANGZHOU CHEM GROUTING CO LTD CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the secondary chain extension of the curing agent, the molecular weight of the prepared curing agent is relatively large, and the viscosity of the entire system also increases, resulting in poor leveling effect of the water-based coating prepared with the curing agent.
Moreover, due to the large molecular weight and viscosity, the emulsification effect of the water-based curing agent on the epoxy resin is not very good, and the emulsified particles will also become larger, resulting in the hardening agent particles in the epoxy resin during the curing process. The migration speed in the medium is slow, and it is difficult to migrate to the middle of the epoxy resin particles before the curing is complete, so the curing is not very complete
In addition, the curing agent prepared by Zhou Jiliang et al. has a hydrophilic group at both ends and a hydrophobic segment embedded in the middle, so that the surface activity of this type of curing agent is not very strong, so its natural The emulsifying effect is not very good

Method used

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  • Non-ionic self-emulsifying aqueous epoxy hardener and preparation method and application thereof
  • Non-ionic self-emulsifying aqueous epoxy hardener and preparation method and application thereof
  • Non-ionic self-emulsifying aqueous epoxy hardener and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 1. Preparation of biepoxy compound:

[0067] In a four-necked flask filled with nitrogen, equipped with a stirrer, a thermometer, a reflux tube, and a constant pressure funnel, add 0.24 moles of SY-669 (ethylene glycol bisglycidyl ether), raise the temperature to 65°C, and add 0.1 moles of Octadecylamine was dissolved in 40 g of propylene glycol methyl ether, placed in a constant pressure funnel, and then slowly dropped into the flask. Control the dropwise addition within 1 to 1.5 hours, then raise the temperature to 70°C, react for about 3 to 4 hours, and determine the end of the reaction by the hydrochloric acid acetone method. Take out the product, cool the product, the infrared spectrum of the product is as follows figure 1 As shown, the NMR spectrum is as figure 2 Shown.

[0068] Such as figure 1 As shown, it can be seen from the structural formulas of the two raw materials that both ends of the ethylene glycol and glycidyl ether molecules have an epoxy group (the c...

Embodiment 2

[0082] 1. Preparation of biepoxy compound:

[0083] In a four-necked flask filled with nitrogen, equipped with a stirrer, a thermometer, a reflux condenser, and a constant pressure funnel, add 0.24 moles of SY-669 (ethylene glycol bisglycidyl ether), raise the temperature to 65°C, and add 0.1 moles of The distilled tallow-based primary amine was dissolved in 40 g of propylene glycol methyl ether, placed in a constant pressure funnel and slowly dropped into the flask. Control the dropwise addition within 1 to 1.5 hours, then raise the temperature to 70°C, react for about 3 to 4 hours, and determine the end of the reaction by the hydrochloric acid acetone method. The product was taken out and cooled. Its structural formula is:

[0084]

[0085] 2. Preparation of non-ionic self-emulsifying waterborne epoxy curing agent:

[0086] Dissolve 0.24 moles of triethylenetetramine in 20 g of propylene glycol methyl ether solution, put it into a four-necked flask filled with nitrogen, equipped...

Embodiment 3

[0095] 1. Preparation of biepoxy compound:

[0096] In a four-necked flask filled with nitrogen, equipped with a stirrer, a thermometer, a reflux condenser, and a constant pressure funnel, add 0.25 moles of butanediol diglycidyl ether, raise the temperature to 65°C, and dissolve 0.1 moles of dihydrogenated tallow amine The tetradecylamine solution in 40 g of toluene is placed in a constant pressure funnel, and then slowly dropped into the flask. Control the dropwise addition within 1 to 1.5 hours, then raise the temperature to 70°C, react for about 3 to 4 hours, and determine the end of the reaction by the hydrochloric acid acetone method. The product was taken out and cooled to room temperature. The structural formula of the resulting product is as follows:

[0097]

[0098] 2. Preparation of epoxy curing agent:

[0099] Dissolve 0.3 mole of triethylenetetramine in 40 g of propylene glycol methyl ether solution, put it into a four-necked flask filled with nitrogen, equipped with ...

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Abstract

The invention relates to an epoxy hardener, in particular to a non-ionic self-emulsifying aqueous epoxy hardener. The hardener is prepared according to the following steps: adopting hydrophobic alkylamine and hydrophilic diglycidol ether with low molecular weight for reaction so as to obtain a diepoxy compound which has epoxy groups at two ends and a middle nitrogen atom linked with a long hydrophobic alkyl side chain; and adopting alicyclic amine for reaction for purpose of sealing the ends or respectively using the alicyclic amine and hydrophilic amine to seal the two ends, and finally obtaining the amino-terminated non-ionic self-emulsifying aqueous epoxy hardener similar to the structure of surfactant. The hardener can be further mixed with deionized water so that a light-yellow aqueous epoxy resin hardener with 50-60 percent of solids content can be obtained. The hardener has good self-emulsifying effect, is well compatible with epoxy resin and has high stability and good flexibility and surface activating function. The hardener can be widely applied in materials such as aqueous epoxy resin paint, epoxy resin binding agent, aqueous epoxy grouting materials, and the like.

Description

Technical field [0001] The invention belongs to the field of epoxy curing agents, and specifically relates to a non-ionic self-emulsifying water-based epoxy curing agent and a preparation method and application thereof. Background technique [0002] Since the 1950s, epoxy resin has been widely used in coatings, adhesives, thermosetting resins, and waterproof plugging in construction engineering due to its excellent mechanical properties, adhesive properties, electrical insulation properties, processing properties and chemical resistance. Industrial fields such as materials and grouting materials. Commonly used epoxy resins are oil-soluble, which makes it necessary to add a large amount of organic solvents in the preparation of coatings, adhesives, and grouting materials. These organic solvents are not only expensive, but also volatile, and are easily affected by the environment. The health of construction workers is harmful. In recent years, systems that contain no or little vo...

Claims

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Application Information

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IPC IPC(8): C07D303/24C07C217/28C07C213/04C08K5/16C08L63/00C08L63/02C09D163/00C09D163/02C09J163/00C09J163/02C04B28/00C04B16/04
Inventor 邹海良张亚峰邝建政徐宇亮刘军
Owner GUANGZHOU CHEM GROUTING CO LTD CAS
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