Product Types & Applications:
Phthalic Anhydride
Phthalic Anhydride is a core raw material used in the production of unsaturated polyester resins (UPR). Chemically, it is an aromatic anhydride that reacts with glycols (such as propylene glycol and DEG) to form polyester chains through esterification. It contributes to controlled reactivity, good processing behavior, and cost-effective formulations.
Applications
Widely used in orthophthalic polyester resins for general-purpose composites, including FRP/GRP products, pipes, tanks, panels, and construction materials. Also used in coatings, plasticizers, and alkyd resins.
Isophthalic Acid
Isophthalic Acid (IPA) is a high-performance aromatic dicarboxylic acid used in the production of unsaturated polyester resins (UPR). Chemically, it reacts with glycols through esterification to form polyester chains, providing improved hydrolytic stability, corrosion resistance, and mechanical strength compared to orthophthalic systems.
Applications
Used in isophthalic polyester resins for demanding applications such as chemical storage tanks, pipes, marine components, corrosion-resistant linings, and high-performance FRP/GRP products.
Maleic Anhydride
Maleic Anhydride is a highly reactive unsaturated anhydride used in the production of unsaturated polyester resins (UPR). Chemically, it provides the double bonds required for crosslinking with styrene, enabling curing and formation of a rigid thermoset network.
Applications
Widely used in orthophthalic, isophthalic, and vinyl ester resins for FRP/GRP products, pipes, tanks, panels, marine parts, and construction materials. It is essential for controlling curing behavior and final mechanical properties.