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Preparation and application of latent nonionic self-emulsifying epoxy curing agent

A self-emulsifying epoxy and non-ionic technology, which is applied in the preparation of imino compounds, epoxy resin coatings, organic chemistry, etc., can solve the problems of gel and curing agent with short storage period, and achieve excellent bonding performance Effect

Inactive Publication Date: 2010-11-17
GUANGZHOU CHEM GROUTING CO LTD CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented method uses specific chemicals from an organic solvent called cresol or phenol that helps create strong bonds between two materials like water and rubber during their manufacturing process.

Problems solved by technology

This patent discusses different ways to improve the efficiency and quality of aquatic epoxy compositions during their production processes. Water-solvable epoxy composition was previously studied before being introduced onto concrete surfaces because they were difficult to dissolve in water while maintaining consistence over time. To address this problem, some efforts had focused on developing a more efficient solution involving reducing the content ratio of hydraulically active ingredients like surfactant monomers and improving compatibility with other components within the mixture. Additionally, exploring alternative solutions based upon specific chemistry principles could lead towards improved performance compared to existing ones.

Method used

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  • Preparation and application of latent nonionic self-emulsifying epoxy curing agent
  • Preparation and application of latent nonionic self-emulsifying epoxy curing agent
  • Preparation and application of latent nonionic self-emulsifying epoxy curing agent

Examples

Experimental program
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Effect test

Embodiment example 1

[0033] 1. Preparation of epoxy-terminated adducts:

[0034] In a four-neck flask filled with nitrogen, equipped with a stirrer, a thermometer, and a reflux condenser, add 0.24 moles of ethylene glycol diglycidyl ether, raise the temperature to 70 ° C, and add solid octadecylamine in batches, controlled at The addition is completed within 1 to 1.5 hours. After the addition, the reaction was continued for about 4 to 6 hours, and the end point of the reaction was determined by the hydrochloric acid acetone method. The product was taken out, cooled, and sealed for storage.

[0035] 2. Preparation of ketimine

[0036] Add 51.68 grams of diethylenetriamine, 105 grams of methyl isobutyl ketone, 0.3 grams of 723 cation exchange resin and 50 milliliters of benzene solution into a three-necked flask equipped with a stirrer, a water separator, and a condenser tube. Under the condition of reflux water separation. When the quality of the separated water is close to the theoretical valu...

Embodiment example 2

[0044] 1. Preparation of epoxy-terminated adducts

[0045] In a four-neck flask filled with nitrogen, equipped with a stirrer, a thermometer, and a reflux condenser, add 0.24 moles of ethylene glycol diglycidyl ether, raise the temperature to 70 ° C, and add solid octadecylamine in batches, controlled at The addition is completed within 1 to 1.5 hours. After the addition, the reaction was continued for about 4 to 6 hours, and the end point of the reaction was determined by the hydrochloric acid acetone method. The product was taken out, cooled, and sealed for storage.

[0046] 2. Preparation of ketimine

[0047] Add 74.62 grams of triethylenetetramine, 61 grams of acetone, 0.3 grams of 723 cation exchange resin, and 50 milliliters of cyclohexane solution into a three-necked flask equipped with a stirrer, water separator, and condenser, and reflux at a temperature of 80°C Divide water. When the quality of the separated water is close to the theoretical value of 18 grams, in...

Embodiment example 3

[0054] 1. Preparation of epoxy-terminated adducts:

[0055] In a four-neck flask filled with nitrogen, equipped with a stirrer, a thermometer, and a reflux condenser, add 0.24 moles of ethylene glycol diglycidyl ether, raise the temperature to 70 ° C, and add solid octadecylamine in batches, controlled at The addition is completed within 1 to 1.5 hours. After the addition, the reaction was continued for about 4 to 6 hours, and the end point of the reaction was determined by the hydrochloric acid acetone method. The product was taken out, cooled, and sealed for storage.

[0056] 2. Preparation of ketimine

[0057] Add 51.68 grams of diethylenetriamine, 61 grams of acetone, 0.3 grams of 723 cation exchange resin, and 50 milliliters of cyclohexane solution into a three-necked flask equipped with a stirrer, water separator, and condenser, and reflux at a temperature of 80°C Divide water. When the quality of the separated water is very close to the theoretical value of 18 grams...

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Abstract

The invention provides a novel method for preparing a latent nonionic self-emulsifying epoxy curing agent. The method comprises the following steps of: reacting long alkyl chain fatty amine with diglycidyl ether to prepare an addition product of which the middle part is connected with a long hydrophobic side chain and two ends are provided with epoxy groups; and reacting polyamine with a carbonyl compound to prepare an imine compound which contains secondary amine, and sealing the end to prepare the latent nonionic self-emulsifying epoxy curing agent. Under water environment, the imine structure in the curing agent hydrolyzes hydrophilic amino, and the curing agent contains the long hydrophobic alkyl chain, so the curing agent has the functions of emulsifying and curing an epoxy resin. The curing agent can be used for water-based epoxy emulsion coatings, water-based epoxy resin modified emulsified asphalt and cement and the like, and has excellent adhesion performance of ketimine on a wet surface. Due to the introduction of hydrophobic chains, the stability of the imine curing agent is improved in the water environment, and the performance of the curing agent in the aspect of wet surface or underwater adhesion can also be improved.

Description

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Claims

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Application Information

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Owner GUANGZHOU CHEM GROUTING CO LTD CAS
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