Preparation method of water-borne epoxy resin coating

A water-based epoxy resin and coating technology, which is applied in the direction of epoxy resin coatings and coatings, can solve the problems of easy rust and coating film performance degradation, and achieve the effects of safe operation, mild reaction and simple process flow

Inactive Publication Date: 2018-03-23
SHAANXI QIYUAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic acid will cause the performance of the coating film to decline, and it is easy to rust when used on metal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of waterborne epoxy resin paint of the present invention may further comprise the steps:

[0018] The first step is addition, adding triethylenetetramine into a 250mL four-necked flask, raising the temperature to 65 degrees, then slowly adding polyethylene glycol diglycidyl ether dropwise while stirring at a constant temperature, and reacting at a constant temperature;

[0019] In the second step, chain extension, the epoxy resin dissolved in the solvent is slowly added dropwise to the reaction product obtained in the first step, and after the drop is completed, the constant temperature reaction is continued for 3 hours;

[0020] The third step, capping: Add capping agents dropwise to the chain extension reaction products, and react at constant temperature for 1 hour after the drops;

[0021] The 4th step, add distilled water, stop reaction after stirring 0.5h; Prepare self-emulsifying waterborne epoxy resin curing agent;

[0022] The fifth step ...

Embodiment 2

[0024] The preparation method of waterborne epoxy resin paint of the present invention may further comprise the steps:

[0025] The first step is addition, adding triethylenetetramine into a 250mL four-necked flask, raising the temperature to 65 degrees, then slowly adding polyethylene glycol diglycidyl ether dropwise while stirring at a constant temperature, and reacting at a constant temperature;

[0026] In the second step, chain extension, the epoxy resin dissolved in the solvent is slowly added dropwise to the reaction product obtained in the first step, and after the drop is completed, the constant temperature reaction is continued for 3 hours;

[0027] The third step, capping: Add capping agents dropwise to the chain extension reaction products, and react at constant temperature for 1 hour after the drops;

[0028] The 4th step, add distilled water, stop reaction after stirring 0.5h; Prepare self-emulsifying waterborne epoxy resin curing agent;

[0029] The fifth step ...

Embodiment 3

[0031] The preparation method of waterborne epoxy resin paint of the present invention may further comprise the steps:

[0032] The first step is addition, adding triethylenetetramine into a 250mL four-necked flask, raising the temperature to 65 degrees, then slowly adding polyethylene glycol diglycidyl ether dropwise while stirring at a constant temperature, and reacting at a constant temperature;

[0033] In the second step, chain extension, the epoxy resin dissolved in the solvent is slowly added dropwise to the reaction product obtained in the first step, and after the drop is completed, the constant temperature reaction is continued for 3 hours;

[0034] The third step, capping: Add capping agents dropwise to the chain extension reaction products, and react at constant temperature for 1 hour after the drops;

[0035] The 4th step, add distilled water, stop reaction after stirring 0.5h; Prepare self-emulsifying waterborne epoxy resin curing agent;

[0036] The fifth step ...

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PUM

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Abstract

The invention relates to a preparation method of a water-borne epoxy resin coating, and relates to the coating preparation field, and particularly relates to the preparation method of the water-borneepoxy resin coating. The method includes steps of adding triethylene tetramine in a 250 mL four-opening flask; rising temperature to 65 DEG C and then stirring while slowly dropwise adding polyethyleneglycol diglycidyl ether under constant temperature; performing constant temperature reaction; slowly dropwise adding the solvent dissolved epoxy resin in a reaction product prepared in step one; after dropping completely, continuing the constant temperature reaction for 3 hours; dropwise adding end-capping reagent in a chain expanding reaction product; after dropping, performing the constant temperature reaction for 1 hour; adding distilled water, and stirring for 0.5 hour and then stopping reaction; preparing the self-emulsified water-borne epoxy resin curing agent. The preparation method issimple in technical flow, safe in operation, and gentle in reaction; the production efficiency and product quality are greatly improved, the production cost is reduced; the processed product has goodlead hardness, impact resistance, adhering property, water resistance and chemical goods resistance; moreover, the service life is long.

Description

technical field [0001] The invention relates to the field of paint preparation, in particular to a preparation method of water-based epoxy resin paint. Background technique [0002] Epoxy resin has good adhesion, low curing shrinkage, excellent mechanical properties, good corrosion resistance, solvent resistance and electrical insulation, and is widely used in chemical, electrical, construction, aviation and other fields. Traditional epoxy resins are all solvent-based, causing a large amount of VOC to pollute the environment. At the same time, the volatilization and flammability of solvents make epoxy resins a great safety hazard in construction, transportation, and storage, which is also harmful to human health. In addition, the extensive use of solvents will also increase the application cost. Therefore, water-based epoxy resins that use water instead of solvents have become a new development trend in recent years. As an environmentally friendly product, they have received...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C08G59/50
CPCC08G59/50C09D163/00
Inventor 张淑芬
Owner SHAANXI QIYUAN TECH DEV
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