Renewable waste acid oil-based PVC plastisols: formulation, characterization and performance studies in coating and molding application

The growing demand for sustainable and environmentally benign polymeric materials has stimulated interest in the development of bio-based plastisols as alternatives to conventional petroleum-derived systems. In the present study, bio-based plastisols were formulated using PVC resin in combination with epoxidized and ring-opening epoxidized esters derived from renewable soya and rice bran acid oils. The prepared plastisols were systematically evaluated for their performance in both molding and coating applications. For molding applications, plastisol formulations containing PVC, bio-based plasticizers, and Ca/Zn stabilizers were prepared and thermally cured to achieve effective gelation and uniform film formation. For coating applications, plastisols were formulated with additional functional additives, including a crosslinking agent and silane binder, and applied onto metal substrates, followed by thermal curing to obtain well-adhered coatings. The processing behavior, curing characteristics, and overall performance of the bio-based plastisols demonstrated their suitability for industrial molding and coating applications. The results demonstrate the potential of epoxidized acid oil-based esters as sustainable plasticizers in plastisol formulations, offering a promising pathway toward eco-friendly PVC processing systems.