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Nonionic self-emulsifying water-based epoxy curing agent and its preparation method and application

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

Inactive Publication Date: 2012-02-08
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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  • Nonionic self-emulsifying water-based epoxy curing agent and its preparation method and application
  • Nonionic self-emulsifying water-based epoxy curing agent and its preparation method and application
  • Nonionic self-emulsifying water-based epoxy curing agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 1. Preparation of Diepoxy Compounds:

[0067] In a four-neck flask filled with nitrogen, equipped with a stirrer, a thermometer, a reflux cold tube, and a constant pressure funnel, add 0.24 moles of SY-669 (ethylene glycol bisglycidyl ether), raise the temperature to 65 ° C, and dissolve 0.1 moles of SY-669 Octadecylamine was dissolved in 40g 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 measure the reaction end point by hydrochloric acid acetone method. The product is taken out, and cooling is worth the product, and the infrared spectrogram of this product is as follows figure 1 As shown, the NMR spectrum is shown as figure 2 shown.

[0068] Such as figure 1 As shown, as can be seen from the structural formulas of the two raw materials, the two ends of the ethylene glycol and ...

Embodiment 2

[0082] 1. Preparation of Diepoxy Compounds:

[0083] In a four-neck 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 dissolve 0.1 moles of SY-669 Dissolve the distilled tallow primary amine in 40 g of propylene glycol methyl ether, put it in a constant pressure funnel and slowly drop it 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 measure the reaction end point by hydrochloric acid acetone method. The product was removed and cooled. Its structural formula is:

[0084]

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

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

Embodiment 3

[0095] 1. Preparation of Diepoxy Compounds:

[0096] In a four-neck 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 40g of toluene was 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 measure the reaction end point by 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 moles of triethylenetetramine in 40 g of propylene glycol methyl ether solution, place it in a four-neck flask filled with nitrogen, equipped ...

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Abstract

The invention relates to an epoxy curing agent, and specifically provides a non-ionic self-emulsifying water-based epoxy curing agent. The curing agent is first reacted with a hydrophobic alkylamine and a low molecular weight hydrophilic bisglycidyl ether to prepare a A kind of diepoxy compound with epoxy groups at both ends and a long hydrophobic alkyl side chain connected to the middle nitrogen atom, and then reacted with fatty amines or both ends are blocked with fatty amines and hydrophilic amines respectively, An amino-terminated nonionic self-emulsifying water-based epoxy curing agent with a structure similar to that of a surfactant is prepared. The curing agent can be further mixed with deionized water to prepare a light yellow water-based epoxy resin curing agent with a solid content of 50% to 60%. The curing agent prepared by the invention has good self-emulsification effect, good compatibility with epoxy resin, high stability, good flexibility and surface activity. It can be widely used in water-based epoxy resin coatings, epoxy resin adhesives and water-based epoxy grouting materials.

Description

technical field [0001] The invention belongs to the field of epoxy curing agents, and in particular relates to a nonionic self-emulsifying water-based epoxy curing agent and its preparation method and application. Background technique [0002] Since the 1950s, epoxy resin has been widely used in coatings, adhesives, thermosetting resins and waterproof plugging in construction projects due to its excellent mechanical properties, adhesive properties, electrical insulation properties, processing properties and chemical resistance properties. Materials and grouting materials and other industrial fields. 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 easy to damage the environment and Hazards to the health of construction workers. In recent years, systems containing no or less vola...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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