• Item Name: Resin XB 9721 with Hardeners XB 3473 / Aradur® 917 / Accelerator DY 070
• Manufacturer: Huntsman Advanced Materials
• Technologies: Multifunctional epoxy resin with amine and anhydride curing agents, imidazole accelerator
• Color: Resin – clear brown liquid; XB 3473 – clear yellow to brown; Aradur 917 – clear liquid; DY 070 – clear liquid
• Cure Type: Hot curing, multi-stage cycles (e.g. 2 h 120 °C + 4 h 180 °C or up to 220 °C)
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
XB 9721 is a multifunctional epoxy resin system designed for hot curing with either amine (XB 3473) or anhydride (Aradur® 917) hardeners, optionally accelerated by DY 070. It is formulated for high-performance industrial composite applications requiring very high glass transition temperatures (Tg) and strong mechanical properties. The system offers versatility in cure cycles and is suitable for processes like filament winding, pultrusion, and pressure moulding.
High-performance industrial composites
Filament winding
Pultrusion
Pressure moulding of advanced structural parts
Applications demanding high Tg and mechanical toughness
| Property | Resin XB 9721 | Hardener XB 3473 | Aradur® 917 | Accelerator DY 070 | Mixed System (Cured) |
|---|---|---|---|---|---|
| Appearance | Clear brown liquid | Clear yellow–brown liquid | Clear liquid | Clear liquid | Transparent cured solid |
| Viscosity | 3000–7000 mPa·s (50°C) | 95–145 mPa·s (25°C) | 50–100 mPa·s (25°C) | ~50 mPa·s (25°C) | ~14,000–17,000 mPa·s (25°C mix) |
| Density | 1.15–1.18 g/cm³ | 0.99–1.02 g/cm³ | 1.20–1.25 g/cm³ | 0.95–1.05 g/cm³ | — |
| Mix Ratio (pbw) | 100 | 38 (system 1) | 141 (system 2) | 0.5–2 | — |
| Pot Life (23°C) | — | — | — | — | 80–95 min (system 1); 70–80 min (system 2) |
| Gel Time | — | — | — | — | 80–100 min (120°C); 18–21 min (160°C); 6–9 min (180°C); 4–7 min (200°C) |
| Typical Cure Cycle | — | — | — | — | 2 h 120°C + 2 h 140°C + 2 h 180°C + 2 h 220°C |
| Glass Transition Temp (Tg, DSC) | — | — | — | — | 198–225°C depending on cure cycle; up to 238°C for multi-stage cure |
| Flexural Strength | — | — | — | — | 85–125 MPa |
| Flexural Modulus | — | — | — | — | 3200–3650 MPa |
| Elongation at Break | — | — | — | — | 2.5–4.2 % |
| Fracture Toughness (K1C) | — | — | — | — | 0.43–0.67 MPa√m |
| Fracture Energy (G1C) | — | — | — | — | 45–100 J/m² |
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