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<p>The growing need for sustainable waterborne coatings has raised interest in acrylic emulsions that can deliver durability, flexibility, and strong water resistance for exterior applications. Conventional systems based on MMA and BA provide balanced mechanical properties but often lack long-term hydrophobicity, while previous research on bio-based hydrophobic monomers has mostly focused on solvent-based systems, leaving a gap in waterborne formulations. To address this, we synthesized acrylic emulsions via emulsion polymerization by systematically replacing BA with bio-based C-13 methacrylate (C-13 MA) and evaluated their structural and performance characteristics using DLS, ATR-FTIR, viscosity, contact angle, and water absorption studies. The results revealed that increasing C-13 MA content led to larger particle sizes, higher viscosities, and enhanced hydrophobicity due to the incorporation of its long alkyl chains and stabilization by reactive surfactant. Consequently, films containing higher C-13 MA exhibited greater water resistance, higher contact angles, and reduced water uptake, demonstrating the potential of C-13 MA to combine eco-friendly chemistry with improved performance for exterior decorative coatings.</p> Graphical abstract

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Synthesis of acrylic emulsion by using a bio-based monomer with enhanced water resistance for exterior emulsion paint

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • Akash R. Parvate,
  • Aarti P. More

摘要

The growing need for sustainable waterborne coatings has raised interest in acrylic emulsions that can deliver durability, flexibility, and strong water resistance for exterior applications. Conventional systems based on MMA and BA provide balanced mechanical properties but often lack long-term hydrophobicity, while previous research on bio-based hydrophobic monomers has mostly focused on solvent-based systems, leaving a gap in waterborne formulations. To address this, we synthesized acrylic emulsions via emulsion polymerization by systematically replacing BA with bio-based C-13 methacrylate (C-13 MA) and evaluated their structural and performance characteristics using DLS, ATR-FTIR, viscosity, contact angle, and water absorption studies. The results revealed that increasing C-13 MA content led to larger particle sizes, higher viscosities, and enhanced hydrophobicity due to the incorporation of its long alkyl chains and stabilization by reactive surfactant. Consequently, films containing higher C-13 MA exhibited greater water resistance, higher contact angles, and reduced water uptake, demonstrating the potential of C-13 MA to combine eco-friendly chemistry with improved performance for exterior decorative coatings.

Graphical abstract