Examining Adhesion Promoters in UV-Cured Nail Coatings: A Comprehensive Investigation into Composition, Polymerization, and Performance Characteristics

UV curing nail coatings have gained immense popularity for their rapid curing time and enhanced performance. Achieving strong adhesion to natural nails is crucial for these coatings. This study investigates various adhesion promoters used in UV-cured nail coatings. Key composition characteristics such as polymerization temperature (T), post-production viscosity, and viscosity stability over three months at 50°C were evaluated. Adhesion with pull-off testing and physico-mechanical properties of cured coatings were examined. Various adhesion promoters including aliphatic acrylates, silanes, dimethacrylate succinate adduct, dimethacrylate maleate adduct, and acid-based adhesion promoters were tested. Silane compounds exhibited superior adhesion and viscosity stability, making them suitable for long-lasting formulations. Polymerization temperature varied, requiring optimization for each formulation. The choice of adhesion promoter strongly influenced physico-mechanical properties, with dimethacrylate/maleate adduct showing superior durability. The findings offer a comprehensive understanding of the influence of adhesion promoters on coating composition and performance, aiding in the development of high-quality, long-lasting UV curing nail coatings for the cosmetics industry.