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Journal of Coatings Technology and Research
Erschienen in: Journal of Coatings Technology and Research 2/2019

17.09.2018

Castor oil-based waterborne hyperbranched polyurethane acrylate emulsion for UV-curable coatings with excellent chemical resistance and high hardness

verfasst von: Daidong Wei, Bing Liao, Qiwen Yong, Huiyi Wang, Tao Li, Jianheng Huang, Hao Pang

Erschienen in: Journal of Coatings Technology and Research | Ausgabe 2/2019

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Abstract

Synthesis, characterization, and coating performance of castor oil (CO)-based waterborne hyperbranched polyurethane acrylate (WHPUA) emulsions are highlighted in this work. Herein, a second-generation CO-based hyperbranched polyester (C20) was synthesized by introducing the renewable CO as a B3 core and dimethylolpropionic acid as an AB2 monomer via a pseudo-one-pot condensation procedure. Three types of CO-based WHPUA emulsions were prepared through the addition of the hyperbranched C20 with maleic anhydride (MA) and the isocyanate-bearing semiadduct (IPDI-HEA) at different MA/IPDI-IH molar ratios without the addition of any emulsifiers. The prepared emulsions were further formulated into UV-curable coating formulations and exposed to a medium-pressure mercury lamp. Consequently, the obtained UV-cured coatings exhibited outstanding adhesion performance, excellent transparency, and an acceptable degree of final double bond conversion. Owing to a relatively low concentration of hydrophilic units and a large number of acrylate functionalities in the waterborne oligomer, the obtained films were endowed with high crosslinking density and low hydrophilic nature, thus producing enhanced tensile strength, pencil hardness, water resistance, and chemical resistance. Due to their combination of renewable materials, a waterborne system and a UV-curing technique, these CO-based WHPUA emulsions offer promising opportunities to be used as environmentally friendly coatings.
Vorheriger Artikel Influence of novel ammonium-modified zinc-free phosphate nanofillers on anticorrosive features of primer-less polyurethane top-coating compositions
Nächster Artikel UV-cured organic–inorganic hybrid moisture barrier materials based on polybutadiene dimethacrylate

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Metadaten
Titel
Castor oil-based waterborne hyperbranched polyurethane acrylate emulsion for UV-curable coatings with excellent chemical resistance and high hardness
verfasst von
Daidong Wei
Bing Liao
Qiwen Yong
Huiyi Wang
Tao Li
Jianheng Huang
Hao Pang
Publikationsdatum
17.09.2018
Verlag
Springer US
Erschienen in
Journal of Coatings Technology and Research / Ausgabe 2/2019
Print ISSN: 1547-0091
Elektronische ISSN: 1935-3804
DOI
https://doi.org/10.1007/s11998-018-0120-1

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