• Item Name: LOCTITE® HHD 4002BK
• Manufacturer: Henkel
• Technologies: Polyurethane Hot Melt
• Color: Black
• Cure Type: Moisture and Solidification
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
LOCTITE® HHD 4002BK is a black, reactive polyurethane hot-melt adhesive that cures through moisture and solidification. It is designed for structural and electronic bonding applications, offering strong initial strength immediately after solidification. The adhesive features excellent chemical and impact resistance, fast curing, reworkability, and reliable performance under assembly line conditions.
Structural adhesive
Electronic structural bonding
Not Mixed / Uncured
| Property | Value |
|---|---|
| Technology | Polyurethane Hot Melt |
| Appearance | Black |
| Odor | Slight |
| Solids Content | 100% |
| Density @ 25 °C | 1.1 g/cm³ |
| Viscosity (Brookfield, Thermosel, 110 °C, mPa·s) | 5,000 |
Curing Performance / After Application
| Property | Value |
|---|---|
| Cure Mechanism | Moisture and Solidification |
| Open Time @ 25 °C | >4 minutes |
| Preheating Schedule | 20–30 minutes @ 100 °C |
| Application Temperature | 100–130 °C |
| Handling Strength | High immediately after bonding |
| Final Strength Development | 1–5 days depending on humidity, substrate moisture, permeability, and adhesive layer thickness |
Cured Material Properties
| Property | Value |
|---|---|
| Young’s Modulus | 82 N/mm² |
| Elongation at Break | 600% |
| Cross Tensile Strength | PC/GF to Ink Glass: 8.0 N/mm² |
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