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Preparation of self-cross-linking acrylic grafted phosphoric functionalized epoxy aqueous dispersion and its anticorrosive performance

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Abstract

An aqueous dispersion of acrylic monomers grafted epoxy phosphate ester (W-P-EPA) with self-cross-linking characteristics was prepared by solution copolymerization. Infrared spectroscopy (FT-IR) confirmed that the structural composition of P-EPA has epoxy, carboxyl and hydroxyl active groups. The morphology and size of W-P-EPA dispersion were analyzed by transmission electron microscopy (TEM) and dynamic light scattering (DLS). W-P-EPA exhibits a nano-spherical colloidal morphology with a wide size distribution. The water absorption of W-P-EPA film prepared from high molecular weight epoxy resin (609) is 3.4 wt%, which is much lower than that of W-P-EPA from low molecular weight epoxy resin (604), suggesting the esterification cross-linking reaction between W-P-EPA(609) macromolecular chains. The much better corrosion protection of W-P-EPA(609) coating than that of commercial acrylic/amino coating is revealed by the electrochemical impedance and potentiodynamic polarization tests, which is caused by the intelligent passivation of phosphate functional group and the unique cross-linking nature.

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Acknowledgements

This research was financially supported by Industrial Prospect and Key Core Technology Projects of Jiangsu Province (SBE2019030778) and Science and Technology Cooperation Funds of Yangzhou City and Yangzhou University (YZ2020179).

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  1. School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China

    Jianxi Zhao & Aiping Zhu

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  1. Jianxi Zhao
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  2. Aiping Zhu
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Zhao, J., Zhu, A. Preparation of self-cross-linking acrylic grafted phosphoric functionalized epoxy aqueous dispersion and its anticorrosive performance. Polym. Bull. 81, 3679–3693 (2024). https://doi.org/10.1007/s00289-023-04886-3

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  • DOI: https://doi.org/10.1007/s00289-023-04886-3

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