We introduce SP2000P (Styrene-Maleic Anhydride Copolymer, PSMA), featuring a styrene/maleic anhydride molar ratio of approximately 2:1, an acid value of 340–370 mgKOH/g, and a molecular weight of 6,000–9,000, delivering dual value for high-performance coatings, composites, and electronic encapsulation materials:
?? As a crosslinking hardener for epoxy resins – high-reactivity anhydride groups enhance crosslinking density and heat resistance
?? As a filler/pigment dispersant – significantly improves the dispersion of inorganic fillers in resins, reducing agglomeration
?? Real-world application case:
After adding 1.5–2.5 phr of SP2000P to an epoxy primer, one coating manufacturer achieved:
? Improved filler dispersion uniformity
? Enhanced melt fluidity and reduced processing energy consumption
? Significantly improved coating adhesion and flexibility
?? Readily soluble in acetone, MEK, THF, and ethyl acetate – excellent processing compatibility.
