Assessing the Impact of Free Monomer Content on Performance and Sustainability in Architectural Coating
Comparative Analysis of Dispersants for Water-Based Paint
DOI:
https://doi.org/10.58445/rars.1812Keywords:
Water-based paints, environmental scienceAbstract
Water-based paints are more environmentally friendly than their oil-based counterpart, but they present challenges such as pigment dispersion due to high surface tension and longer drying times. To address these challenges, polymeric dispersants are used to help disperse and stabilize pigments. Polymeric dispersants are synthesized by polymerizing monomers; however, not all monomers are consumed during synthesis, resulting in free monomers remaining in the dispersant. These monomers play a significant role in water-based paints by influencing odor, film formation, water resistance, and environmental impact.
Two common polymeric dispersants used in water-based paints are Dispersant 4140 and Dispersant 4141. Dispersant 4140 has a lower concentration of free monomers, making it more suitable for environmentally conscious applications. In contrast, Dispersant 4141, with a higher monomer concentration, presents challenges such as odor control, high volatile organic compound (VOC) emissions, and potential environmental risks. This comparative analysis of dispersants highlights the critical role of monomer concentration in the overall performance and environmental sustainability of paint formulations. Additionally, it underscores why Dispersant 4140 is better suited for modern coatings, offering benefits for environmental sustainability.
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