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Organic silicone-modified waterborne epoxy coatings using aqueous curing agents technology

Xinyan Lv (School of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University, Nanchang, China)
Yisheng Liang (School of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University, Nanchang, China)
Jiang Zhong (School of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University, Nanchang, China)
Haifeng He (School of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University, Nanchang, China)

Pigment & Resin Technology

ISSN: 0369-9420

Article publication date: 29 November 2022

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Abstract

Purpose

The silicone modifications of two-component epoxy resin coatings are commonly built on epoxy resins rather than on epoxy curing agents. The silicone-modified epoxy curing agent system is rarely reported yet. This study aims to prepare the polysiloxane (PS)-modified waterborne epoxy coatings based on aqueous curing agents technology.

Design/methodology/approach

Waterborne epoxy curing agents with different contents of terminal epoxy PS were synthesized by reacting with triethylenetetramine, followed by incorporating of epoxy resin (NPEL-128) and polyethylene glycol diglycidyl ether. The waterborne epoxy coatings were prepared with the above curing agents, and their performance was investigated through thermogravimetric analysis, scanning electron microscopy, mechanical characterization, gloss measurement, chemical resistance test and ultraviolet (UV) aging experiment.

Findings

The results showed that the epoxy coating prepared by silicon-modified curing agent has higher gloss, better chemical resistance and UV resistance than the coating from unmodified curing agent with terminal epoxy PS and commercially available waterborne epoxy curing agent (Aradur 3986), as well as the competitive mechanical properties and heat resistance. Reduced water absorption on fibrous paper was also obtained with the help of silicon-modified curing agent.

Originality/value

These findings will be valuable for resin researchers in addressing the modification issues about waterborne epoxy resin and curing agent.

Keywords

Acknowledgements

This study was supported by Natural Science Foundation of Jiangxi Province (20212BAB233010).

Dater availability statement: The data that support the findings of this study are available from the corresponding author upon reasonable request.

Conflict of interest statement: The authors declare no competing financial interest.

Citation

Lv, X., Liang, Y., Zhong, J. and He, H. (2022), "Organic silicone-modified waterborne epoxy coatings using aqueous curing agents technology", Pigment & Resin Technology, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/PRT-06-2022-0073

Publisher

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Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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