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<p>Although the interaction between inorganic pigment particles and polymeric dispersing agents has been widely studied, their direct influence on the performance of fully formulated paints remains underexplored. In this work, we investigate, for the first time, the use of comblike copolymers as dispersants for inorganic pigments in waterborne coatings. These copolymers are synthesized in aqueous solution via free radical copolymerization of methacrylic acid (MAA) and poly(ethylene glycol) methacrylate (PEGMA), yielding a targeted starlike architecture. These copolymers are thoroughly characterized by nuclear magnetic resonance (NMR), size exclusion chromatography with multiangle light scattering and refractive index detectors (SEC/MALS/RI), and small-angle X-ray scattering (SAXS). The newly developed copolymers are then integrated into waterborne paint formulations, replacing conventional linear dispersants. Using latex binders with varying functionalities, we evaluate the resulting film properties. Our findings show that while binder functionality significantly affects the final coating performance, the use of comblike copolymers consistently enhances hydrophobicity and improves the protective performance of the coatings, particularly in anticorrosive systems, without compromising optical properties.</p>

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Comblike copolymers with star conformation as dispersants of pigments in waterborne paint formulations

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月6日

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  • Sara Beldarrain,
  • Richard Aceituno,
  • Amaia Iturrospe,
  • Arantxa Arbe,
  • Aitor Barquero,
  • Edurne González,
  • Jose Ramon Leiza

摘要

Although the interaction between inorganic pigment particles and polymeric dispersing agents has been widely studied, their direct influence on the performance of fully formulated paints remains underexplored. In this work, we investigate, for the first time, the use of comblike copolymers as dispersants for inorganic pigments in waterborne coatings. These copolymers are synthesized in aqueous solution via free radical copolymerization of methacrylic acid (MAA) and poly(ethylene glycol) methacrylate (PEGMA), yielding a targeted starlike architecture. These copolymers are thoroughly characterized by nuclear magnetic resonance (NMR), size exclusion chromatography with multiangle light scattering and refractive index detectors (SEC/MALS/RI), and small-angle X-ray scattering (SAXS). The newly developed copolymers are then integrated into waterborne paint formulations, replacing conventional linear dispersants. Using latex binders with varying functionalities, we evaluate the resulting film properties. Our findings show that while binder functionality significantly affects the final coating performance, the use of comblike copolymers consistently enhances hydrophobicity and improves the protective performance of the coatings, particularly in anticorrosive systems, without compromising optical properties.