Study of the Curing Process of Opaque Polyurethane-Based Primers

Polyurethane-based LKM are widely used for finishing medium-density fiberboards (MDF) employed in the production of furniture fronts and wall panels. These materials are characterized by high strength, as well as mechanical and chemical resistance. The curing process of these coatings is a critical stage that determines the quality of the final finish and is influenced by temperature and application rate. This study investigates the curing process of opaque polyurethane primers with the aim of optimizing production conditions. The experimental research included a full factorial experiment, which allowed for establishing the dependency of curing time on key parameters. A mathematical model was developed to quantitatively assess the influence of temperature and application rate on curing time. The optimal temperature range for drying polyurethane primers was determined, which minimizes the risk of coating defects and ensures high product quality. The results of the study can be used to optimize production processes, reducing operational costs and increasing energy efficiency. A statistical comparison of domestic polyurethane primers with foreign analogs may significantly contribute to the import substitution process, enabling the comparison and assessment of efficiency. The development of domestic materials based on the obtained data will ensure more competitive production and independence from imported supplies.

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