Low molecular weight styrene and maleic anhydride copolymers for aqueous pigment dispersion

SMA 1440H, a member of ARCO Chemical Co's family of low molecular weight styrene and maleic anhydride copolymers has established a new level of performance in pigment dispersion technology. Coatings manufacturers have developed commercial formulations in which SMA 1440H has been shown to perform as an all inclusive one component dispersant in latex paint formulations; replacing as many as 4–5 other types of dispersants. Because of its anionically charged chemical structure and complementary design of hydrophilic‐hydrophobic properties, SMA 1440H can effectively disperse and stabilise many different types of pigments. SMA 1440H, a polyelectrolyte resin becomes water insoluble as the paint film cures and, therefore, contributes to film reinforcement. SMA 1440H is the ammoniacal solution of SMA 1440A.