Hydroxy-terminated polybutadiene

Hydroxy-terminated polybutadiene (CAS 69102-90-5 ), commonly known as HTPB, is a liquid reactive oligomer with hydroxyl end groups that allow it to be cured into flexible elastomeric networks. It functions as a reactive binder, plasticizer, and crosslinkable base polymer across demanding industrial applications where low-temperature flexibility and chemical resistance are required for the final product. In solid rocket propellant and explosive formulations, HTPB acts as the primary binder matrix, holding energetic fillers in a processable, castable composite for aerospace and defense sectors. Polyurethane sealants and elastomers use HTPB as a soft-segment diol, reacting with isocyanates to produce systems with outstanding low-temperature performance for aerospace and construction joints. In coatings and corrosion-resistant linings, it contributes flexibility and adhesion to substrates exposed to harsh chemical environments, ensuring long-term durability and structural integrity. Adhesive formulators incorporate HTPB into structural and pressure-sensitive systems where elongation and impact resistance are critical performance requirements for industrial bonding applications. HTPB is supplied as a viscous liquid at ambient temperature, typically in drum and IBC packaging. Standard commercial grades are characterized by hydroxyl functionality and molecular weight. Both industrial and aerospace-qualified grades are available, with buyers typically referencing specifications such as R-45M or equivalent for propellant and high-performance elastomer applications. Contact us for supply of Hydroxy-terminated polybutadiene Request Quote

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