LOCTITE HHD 3542

LOCTITE HHD 3542, Polyurethane Hot Melt, Reactive, Long open time, Solidification and Moisture LOCTITE® HHD 3542 is a reactive hot-melt adhesive based on polyurethane prepolymers. It is designed for robotic dispensing and has 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. Fully cured product does not remelt.

• Medium viscosity
• One component - requires no mixing

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, Environment Resistant, 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
Substrates	Acrylonitrile Butadiene Styrene (ABS), Metal: Aluminum, Polycarbonate
Technology	Hot Melt, Polyurethane
Viscosity, Brookfield - Thermosel, @ 100.0 °C Spindle 27	3500.0 - 7500.0 mPa·s (cP)