Water-borne epoxy resin, preparation process thereof and epoxy zinc-rich primer

A water-based epoxy resin and epoxy resin technology, used in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of low solid content and high solvent water content, achieve high solid content, reduce production costs, improve The effect of the antiseptic effect

Pending Publication Date: 2021-11-23
浙江弘利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to improve the problem of low solid content caused by the high solvent water content in the conventional water-based epoxy resin, the application provides a water-based epoxy resin and its preparation process and epoxy zinc-rich primer

Method used

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  • Water-borne epoxy resin, preparation process thereof and epoxy zinc-rich primer
  • Water-borne epoxy resin, preparation process thereof and epoxy zinc-rich primer
  • Water-borne epoxy resin, preparation process thereof and epoxy zinc-rich primer

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0073] To prepare 1kg of emulsifier, the following raw materials need to be used in parts by mass:

[0074] E20 epoxy resin 90g;

[0075] N,N dimethylethanolamine 10g;

[0076] Polyethylene glycol 900g.

[0077] The preparation technology of emulsifying agent specifically comprises the following processing steps:

[0078] Weigh and mix the epoxy resin and polyethylene glycol according to the above ratio, stir at a temperature of 70±2°C at a stirring speed of 400r / min, and stir for about 10min to make the epoxy resin and polyethylene glycol mix evenly. Then add N,N dimethylethanolamine, continue to stir, and after stirring for about 10 minutes, raise the temperature to 130±2°C, and keep it warm for 5 hours to obtain the emulsifier.

[0079] Due to the severe yellowing of the emulsifier finally obtained, it was not used as an emulsifier for epoxy resin water-based modification.

preparation example 2

[0081] To prepare 1kg of emulsifier, the following raw materials need to be used in parts by mass:

[0082]

[0083] The preparation technology of emulsifying agent specifically comprises the following processing steps:

[0084] Step 1, esterification reaction, weigh polyethylene glycol and humic acid according to the above mass parts, mix the two evenly, pass nitrogen gas into the process for protection, and react at a temperature of 120±2°C for 2 hours to obtain an esterified product .

[0085] Step 2, grafting reaction, weigh the epoxy resin and N,N dimethylethanolamine according to the above mass parts, first add the epoxy resin to the esterified product prepared in step 1, and control the temperature to 110±2°C After stirring evenly, N, N dimethylethanolamine is added, and nitrogen gas is still passed through the whole process for protection. After reacting for 1 hour, the emulsifier is obtained.

preparation example 3-6

[0087] The difference between Preparation Example 3-6 and Preparation Example 2 is that the various compositions of the emulsifier are different, and are recorded as the following table, and the measurement units of the components in the following table are all g:

[0088]

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Abstract

The invention relates to water-borne epoxy resin, a preparation process thereof and an epoxy zinc-rich primer. The water-borne epoxy resin at least comprises the following raw materials in parts by mass: 60-70 parts of epoxy resin; 6-10 parts of a hydrophilic catalyst; 5-10 parts of an emulsifier; and 20-35 parts of propylene glycol methyl ether. The preparation process of the water-borne epoxy resin comprises the step of mixing all the materials and carrying out heat preservation reaction. The waterborne epoxy resin can be used for preparing an epoxy zinc-rich primer. The waterborne epoxy resin has the effects of being high in solid content and wide in application range, and the epoxy zinc-rich primer prepared from the waterborne epoxy resin has the effects of being good in anti-corrosion effect and suitable for being used for rusty bottom plates.

Description

technical field [0001] The application relates to the field of epoxy resin coatings, in particular to a water-based epoxy resin and its preparation process and epoxy zinc-rich primer. Background technique [0002] Epoxy resin is widely used in the bonding of various metals and non-metallic materials, corrosion-resistant coatings, electrical insulation materials, composite materials, etc. due to its excellent adhesion, corrosion resistance, stability, insulation and mechanical strength. In the field, most of the commonly used epoxy resins are viscous liquids or solids, insoluble in water, only soluble in organic solvents, and most organic solvents are volatile, toxic, flammable and explosive, so the application of epoxy resins is restricted. certain restrictions. Water is a cheap and environmentally friendly solvent. With the increasing awareness of environmental protection, water-based epoxy resin with water as solvent and dispersion medium has been paid more and more atten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14C09D163/00C09D5/10C09D5/24C09D7/65C08G81/00
CPCC08G59/1477C09D163/00C09D5/106C09D5/24C09D7/65C08G81/00C08K2003/0893C08K2003/0806C08K2201/011C08L87/005C08L79/04C08K3/08C08K5/1545
Inventor 郑成利郑文涛
Owner 浙江弘利新材料有限公司
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