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A kind of waterborne epoxy resin and preparation method thereof

A technology of water-based epoxy resin and epoxy resin, which is applied in the field of coatings to achieve good wettability, improve water and alcohol resistance, and be easily soluble in water

Active Publication Date: 2021-01-12
ZHEJIANG CASNOVO MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this application, it is necessary to add benzoyl peroxide as an initiator to complete the monomer polymerization, and dimethylethanolamine is only used as a neutralizing agent, and it is added at the end of the reaction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of waterborne epoxy resin, comprises the component of following percentage by weight: Raw material a 6.5% (triethylamine); Raw material b 7.8% (select methyl methacrylate as raw material b in the present embodiment, certainly also can select for use methyl methacrylate Ethyl acrylate, isopropyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, isooctyl methacrylate, n-octyl methacrylate, cyclohexyl methacrylate, methacrylic acid Isobornyl ester, etc. have the same effect); raw material c 2.3% (in this embodiment, monoethanolamine is selected as raw material c, and of course alcoholamines such as diethanolamine and triethanolamine with similar properties can also be used); raw material d 35.6% (the epoxy resin of 300 epoxy equivalents); Raw material e 20.2% (propylene glycol methyl ether acetate); Raw material f6.7% (acrylic acid); All the other are deionized water.

[0029]The preparation method of the above water-based epoxy resin is as follows: add ...

Embodiment 2

[0032] A kind of waterborne epoxy resin, comprises the component of following percentage by weight: Raw material a 11.2% (triethanolamine); Raw material b 4.5% (select ethyl acrylate in the present embodiment, as raw material b, certainly also can select methyl acrylate, n-butyl acrylate, hydroxypropyl acrylate, isooctyl acrylate, etc.); raw material c 5.1% (select acetamide in this embodiment, certainly also available dimethylformamide, isobutyramide, etc.); raw material d 27.9% ( 850 epoxy equivalent epoxy resin); raw material e 15.6% (for ethylene glycol monobutyl ether, of course other ether raw materials can also be used as co-solvent); raw material f 7.4% (methacrylic acid); the rest is deionized water.

[0033] The preparation method of the above-mentioned water-based epoxy resin is as follows: add raw material a and raw material b into a four-necked flask, heat up to 43°C, stir for 3 hours, then heat up to 94°C, add raw material c, raw material d, stir for 6.2 hours, t...

Embodiment 3

[0036] A water-based epoxy resin, comprising the following components by weight percentage: raw material a 7.5% (hexamethyleneimine); raw material b 6.6% (the present embodiment selects ethylene carbonate, certainly can also select propylene carbonate); Raw material c 2.2% (in this embodiment, aniline is selected, of course o-phenylenediamine, 2,4-dimethylaniline, N,N-diethylaniline, p-fluoroaniline, etc. can also be used); raw material d 33.6% ( 550 epoxy equivalent); raw material e 16.6% (vinyl ethyl ether); raw material f 9.7% (acrylic acid); the rest is deionized water.

[0037] The preparation method of the above water-based epoxy resin is as follows: add raw material a and raw material b into a four-necked flask, heat up to 56°C, stir for 4 hours, then heat up to 88°C, add raw material c, raw material d, stir for 5 hours, add raw material e, raw material f, deionized water, continue to keep warm for 3h, cool to room temperature, adjust the pH to 8 with a neutralizing age...

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Abstract

An aqueous epoxy resin is characterized by comprising following components in percentage by weight: 5 to 15% of a raw material (a), 2 to 10% of a raw material (b), 1 to 8% of a raw material (c), 26 to47% of a raw material (d), 14 to 25% of a raw material (e), 5 to 10% of a raw material (f), and the balance being deionized water; wherein the raw material (a) is at least one of secondary amine andtertiary amine; the raw material (b) is at least one of unsaturated carboxylic esters; the raw material (c) is at least one of alcohol amines, amides, aromatic amines, imines, and hydroxyl amines; theraw material (d) is one of epoxy resins with different epoxy equivalents; the raw material (e) is one of organic solvents; and the raw material (f) is one of acrylic monomers. The invention also discloses a preparation method of the aqueous epoxy resin. Compared with the prior art, the provided aqueous epoxy resin has the advantages of strong binding performance, high mechanical strength, strongwaterproof performance, and good alcohol resistant property, and is green and environmentally friendly. The preparation method is simple.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a water-based epoxy resin and a preparation method thereof. Background technique [0002] With the development of industry and the progress of society, people's awareness of environmental protection has increased, and there is an urgent need for pollution-free coatings and coating technologies in the market. Environmentally-friendly coatings such as water-based coatings, powder coatings and high-solid coatings have long been developed abroad. trend. Internationally, water-based coatings are the new type of coatings with the highest production and demand at present, because they meet environmental protection requirements, have low volatile organic compounds (volatile organic compounds, referred to as VOC), low toxicity, and no fire hazard. Easy to apply, safe and hygienic. According to reports, 85% of the paint companies in the world are engaged in the research, dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D133/12C09D133/10C08F283/10
Inventor 徐军付允明裘家升顾卓韦张莉莉周昶吉
Owner ZHEJIANG CASNOVO MATERIALS
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