Title: Comparing the Cost-Effectiveness of Different Anti-Yellowing Solutions for Waterborne Polyurethane Coatings Introduction 🌟 Waterborne polyurethane (WPU) coatings have become increasingly popular in recent years due to their low volatile organic compound (VOC) emissions, environmental friendliness, and excellent mechanical properties. However, one persistent challenge that plagues these coatings is yellowing — a phenomenon where the...