Selecting wetting agents for pigments and fillers is a crucial technical link in industries such as coatings. As three major types of mainstream pigments and fillers, titanium dioxide, carbon black, and organic pigments have distinct surface chemical properties, leading to completely different selection logics. The professional selection plan shared by Zhangdao Chemical, starting from the essence of pigments and fillers, provides practical references for the industry.
    Before selection, three core questions must be clarified: the surface energy level of the pigment/filler, the presence of strong agglomeration structures, and the tendency to re-agglomerate after wetting. Titanium dioxide, with high surface energy and strong hydrophilicity, is suitable for anionic wetting agents and products containing anchoring groups such as carboxylates. Carbon black, featuring low surface energy and high re-agglomeration tendency, requires a combination of "strong wetting + strong anchoring dispersants". Organic pigments, characterized by low surface polarity and strong chemical inertness, prioritize non-ionic or silicone-based wetting agents, combined with polymer dispersants to stabilize color. Targeted matching is needed for different application scenarios to avoid problems like false dispersion and coarsening.

    For more information, please visit: https://www.tiktok.com/@mia_iota/video/7597717976720149782