The Role of Polyurethane Coating Catalysts in 1K Moisture-Cure Industrial Metal Primers: A Comprehensive Review

abstract: single-component (1k) moisture-cure polyurethane (pur) primers have gained significant traction in the industrial metal coatings sector due to their ease of application, excellent adhesion, and robust corrosion protection. the curing mechanism of these primers relies on atmospheric moisture reacting with isocyanate groups present in the pur prepolymer. however, this reaction can be slow, especially under low humidity or low temperature conditions. consequently, the incorporation of…