Scripset 640 Styrene-maleic anhydride copolymer Hercules Waxes & Paraffin ADHESIVE Scripset ® Resins (Styrene Maleic Anhydride Copolymers) Starch Modifier – Adhesives Increased Water Resistance Adhesive Systems – Increased Water Resistance Antiblock Component Alkali Removal Component Scripset® 640 is a copolymer of styrene and maleic anhydride esterified with butyl methyl ester Styrene/maleic anhydride copolymer, esterified with butyl methyl ester. Used as a starch modifier in adhesives to increase water resistance and as an antiblock and an alkali removal component in adhesive systems.