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Epoxy emulsion cured at room temperature with high aquosity and weather resistance as well as preparation method of epoxy emulsion

A technology of room temperature curing and epoxy emulsion, applied in the direction of coating, etc., can solve the problems of weather resistance and single-component room temperature curing, and the concentration of epoxy functional groups is reduced, and achieve excellent physical and mechanical properties. The effect of wide application and simple preparation process

Inactive Publication Date: 2013-12-04
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molecular weight of the epoxy resin in this system is relatively high, so the concentration of epoxy functional groups is relatively low, and since the resin component exists in the form of water dispersion, a curing agent with slightly stronger hydrophobicity can be used to improve the solvent resistance of the coating film. Water resistance, abrasion resistance and flexibility, but the weather resistance and one-component room temperature curing used in architectural waterborne epoxy coatings have not been well resolved

Method used

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  • Epoxy emulsion cured at room temperature with high aquosity and weather resistance as well as preparation method of epoxy emulsion
  • Epoxy emulsion cured at room temperature with high aquosity and weather resistance as well as preparation method of epoxy emulsion
  • Epoxy emulsion cured at room temperature with high aquosity and weather resistance as well as preparation method of epoxy emulsion

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1. Content formula according to mass percentage

[0014]

[0015] 2. Preparation method

[0016] Step 1. Add E-20 epoxy resin, E-12 epoxy resin, n-butanol, and ethylene glycol butyl ether to the reactor respectively, heat the oil bath to 115°C, and start stirring when the epoxy resin is fully dissolved Slowly add the mixed solution of benzoyl peroxide, methacrylic acid, hexafluorobutyl acrylate, diacetone acrylamide and adipic acid disulfide dropwise at a constant temperature and at a constant speed within 108 minutes. After the dropwise addition, gradually raise the temperature to 125°C , continue to stir the reaction for 240min.

[0017] Step 2. After the reaction is completed, cool down to 55°C, add N,N-dimethylethanolamine respectively, stir the reaction for 35 minutes until pH=7-8, then add water to disperse at high speed for 72 minutes, cool down to room temperature and filter the material to obtain a water-based high weather resistance A room temperature cur...

Embodiment 2

[0022] 1. Content formula according to mass percentage

[0023]

[0024] 2. Preparation method

[0025] Step 1. Add E-20 epoxy resin, E-12 epoxy resin, n-butanol, and ethylene glycol butyl ether to the reactor respectively, heat the oil bath to 113°C, and start stirring when the epoxy resin is fully dissolved Slowly add the mixed solution of benzoyl peroxide, methacrylic acid, hexafluorobutyl acrylate, diacetone acrylamide and adipic acid diamide dropwise at a constant temperature and at a constant speed within 106 minutes. After the dropwise addition, gradually raise the temperature to 124°C , continue to stir the reaction for 238min.

[0026] Step 2. After the reaction is completed, cool down to 54°C, add N,N-dimethylethanolamine respectively, stir the reaction for 34 minutes until pH=7-8, then add water to disperse at high speed for 71 minutes, and filter the material at room temperature to produce a new type of water-based High weather resistance room temperature curi...

Embodiment 3

[0031] 1. Content formula according to mass percentage

[0032]

[0033] 2. Preparation method

[0034] Step 1. Add E-20 epoxy resin, E-12 epoxy resin, n-butanol and ethylene glycol butyl ether to the reactor respectively, heat the oil bath to 114°C, and start stirring when the epoxy resin is fully dissolved Slowly add the mixed solution of benzoyl peroxide, methacrylic acid, hexafluorobutyl acrylate, diacetone acrylamide and adipic acid diamide dropwise at a constant temperature and at a constant speed within 107 minutes. After the dropwise addition, gradually raise the temperature to 126°C , continue to stir the reaction for 239min.

[0035] Step 2. After the reaction is completed, cool down to 56°C, add N,N-dimethylethanolamine respectively, stir the reaction for 36 minutes to pH=7-8, then add water to disperse at a high speed for 73 minutes, cool down to room temperature and filter the material to obtain a water-based high weather resistance A room temperature curing ...

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Abstract

The invention discloses epoxy emulsion cured at room temperature with high aquosity and weather resistance as well as a preparation method of the epoxy emulsion. The epoxy emulsion comprises the following components in percentage by weight: 15-20 percent of E-20 epoxy resin, 5-10 percent of E-12 epoxy resin, 1.0-1.5 percent of benzoyl peroxide, 4.0-6.0 percent of methacrylic acid, 3.0-8.0 percent of hexafluorobutyl acrylate, 0.5-2.5 percent of diacetone acrylamide, 0.5-2.5 percent of adipic acid dihydrazide, 10-20 percent of ethylene glycol monobutyl ether, 5-10 percent of n-butyl alcohol, 3.5-5.5 percent of N,N-dimethylethanolamine and 22-40 percent of water. The preparation method comprises the following steps: firstly, adding E-20 epoxy resin, E-12 epoxy resin, n-butyl alcohol and ethylene glycol monobutyl ether to be evenly dissolved; then, dipping mixed solution of benzoyl peroxide, methacrylic acid, hexafluorobutyl acrylate, diacetone acrylamide and adipic acid dihydrazide to be reacted; and adding N,N-dimethylethanolamine and water to prepare the epoxy emulsion. The epoxy emulsion and the preparation method of the epoxy emulsion have the characteristics of weather resistance, abrasive resistance, water resisting property, alkali resistance, corrosion resistance, flexibility, washable resistance, environment protection and simple preparation process.

Description

technical field [0001] The invention relates to a water-based high weather resistance room temperature curing epoxy emulsion and a preparation method thereof, belonging to the technical field of polymer emulsion coatings. Background technique [0002] In recent years, research on the preparation of epoxy emulsions at home and abroad has achieved certain results, but there are still many problems to be solved. Commonly used epoxy resins are non-water-soluble and only soluble in organic solvents such as aromatic hydrocarbons, ketones and alcohols. Organic solvents are volatile and pollute the environment, which limits the application of epoxy resins in coatings. Waterborne epoxies emerged in the late 1970s and early 1980s. It is a water-based emulsion prepared by mixing liquid epoxy resin with a salt-forming amine curing agent. The water-based epoxy emulsion cures slowly and has a short construction period. The resulting coating film has excellent corrosion resistance, flexi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/64C08G59/17C08F283/10C08F220/06C08F220/22C09D151/08
Inventor 郭文录张秀荣周宏春
Owner JIANGSU UNIV OF SCI & TECH