LOCTITE® HHD 3542

Features and Benefits

Reactive polyurethane hotmelt adhesive based on polyurethane prepolymers. It is designed for robotic dispensing and has a relatively long open time.
LOCTITE® HHD 3542 is a light yellow to amber solid reactive polyurethane hotmelt adhesive based on polyurethane prepolymers. It is designed for robotic dispensing and has a relatively long open time. It provides good initial strength in the bond line. Then the secondary moisture cure cross-links the bonds for excellent elongation and structural durability. Fully cured product does not remelt.
  • Has a relatively long open time
  • It provides good initial strength in the bond line
  • Designed for robotic dispensing
  • Fully cured product does not 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)