LOCTITE® HHD 3542
Features and Benefits
One-part hot melt polyurethane-based bonding adhesive explicitly designed for robotic dispensing.
If you’re looking for a reactive hot melt adhesive for your robotic dispensing needs, LOCTITE® HHD 3542 is the ideal choice. This medium-viscosity bonding adhesive is based on polyurethane prepolymers and offers strong bonding capabilities and a relatively long open time. Immediately after solidifying in the bond line, the adhesive provides good initial strength. Then, the secondary moisture cure cross-links the bonds for excellent elongation and structural durability. When fully cured, LOCTITE® HHD 3542 doesn’t remelt.
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Technical Information
| Application method | Extrusion, Hot applied |
| Color | Off white |
| Cure type | Heat cure |
| FEA (finite element analysis) | Finite strain, Viscoelastic |
| Key characteristics | Chemical resistant, Elongation: high elongation, Environmental resistance, Open time: medium open time, Reactive, Urethane based |
| Number of components | 1 part |
| Open time, @ 25.0 °C 1 mm bead | 4.0 min. |
| Operating temperature | 90.0 - 110.0 °C |
| Recommended for use with | Acrylonitrile butadiene styrene (ABS), Metal: aluminum, Polycarbonate |
| Viscosity, Brookfield - Thermosel, @ 100.0 °C Spindle 27 | 3500.0 - 7500.0 mPa·s (cP) |
LOCTITE® HHD 3542
One-part hot melt polyurethane-based bonding adhesive explicitly designed for robotic dispensing.