Crotonic acid is primarily used in the production of copolymers, such as vinyl acetate-crotonic acid copolymers, which are essential in the formulation of adhesives, coatings, and paints. These copolymers enhance the adhesion, durability, and water resistance of the final products. Additionally, crotonic acid serves as a precursor in the synthesis of various chemicals, including pharmaceuticals and agrochemicals. It is also employed in the manufacture of plasticizers and resins, contributing to the flexibility and stability of plastic materials. In the textile industry, crotonic acid-based compounds are used as sizing agents to improve the strength and smoothness of fibers. Furthermore, it finds application in the production of specialty chemicals used in personal care products, such as hair sprays and styling gels, due to its film-forming properties.