Esterified polystyrene maleic anhydride copolymer is widely used in the coatings and paints industry due to its excellent film-forming properties and adhesion to various substrates. It enhances the durability and resistance of coatings against weathering, chemicals, and abrasion. In the textile industry, it is employed as a sizing agent to improve the strength and smoothness of fibers during weaving. Additionally, it serves as a dispersant in pigment formulations, ensuring uniform color distribution and stability in inks and paints. The copolymer is also utilized in the paper industry to improve the strength and water resistance of paper products. Its compatibility with other polymers makes it a valuable additive in adhesives, providing enhanced bonding performance and flexibility. In the field of personal care, it is incorporated into cosmetic formulations to stabilize emulsions and improve the texture of products.