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.

Where is Hydroxy-terminated polybutadiene used?

• Rocket propellant and explosives: primary binder matrix holding energetic fillers in a castable composite
• Polyurethane sealants and elastomers: soft-segment diol reacting with isocyanates for low-temperature performance
• Coatings and corrosion-resistant linings: flexibility and adhesion in harsh chemical environments
• Adhesives: structural and pressure-sensitive systems needing elongation and impact resistance
• It serves as a reactive binder, plasticizer and crosslinkable base polymer.

Good to know: Buyers typically reference specifications such as R-45M or equivalent for propellant and high-performance elastomer applications.

Commercial specifications

• Standard commercial grades characterized by hydroxyl functionality and molecular weight
• Industrial and aerospace-qualified grades
• Drum and IBC packaging