Huawen® SMA resins (styrene maleic anhydride copolymers) offer flexible chemical modification options. They can be used as dispersants in inks and paints, heat-resistant overprint varnish, and high-pigment-base-ratio pigment pastes. Chemically modified SMA resins serve as dispersants in coatings and inks, improving wettability, dispersion uniformity, storage stability, and heat resistance. For example, sodium salts of SMA can act as pigment dispersants, enhancing pigment wettability and dispersion.