SG1578-164 is a solvent-free, one-component, moisture curing hot melt, automotive urethane adhesive. This product is supplied in a solid form and is applied like that of a bulk hot melt adhesive. Once dispensed, the automotive exterior adhesive will react with ambient moisture to yield a cross-linked thermoset adhesive. Heat is not required for cure to occur.
Elastic Bonding (EB)
Reactive One Component (R1K)
Hot-melt Polyurethane (Reactive Hot Melt)
The shelf life of SG1578-164 is twelve months at 23°C (73°F) in unopened factory sealed containers. Due to product moisture sensitivity, shipping containers must be kept tightly sealed and opened just prior to product use.
SG1578-164 contains di-isocyanate, it is preferable to avoid contact with the skin and with food products. This precaution only applies to non-cured adhesive in its delivered state. Refer to the product Safety Data Sheet (SDS) prior to use for complete cautionary information.
The typical application temperature range for SG1578-164 is 110°C – 120°C (230°F – 248°F). Refer to the product SDS prior to use at temperatures greater than 120°C (248°F). Adhesive application is best conducted using direct pail or drum melting systems. These systems may be equipped for adhesive application via bead extrusion, swirl spray, or roll coating methods. Adhesive cure rate is dependent upon substrate type and moisture permeability, relative humidity, and temperature. The optimal curing conditions are 50% relative humidity and 21°C (70°F). SG1578-164 will develop adhesive properties within 24 hours. Under optimal conditions, the adhesive will achieve final properties after seven days.
Since SG1578-164 is applied at elevated temperatures, it is advisable to clean the equipment regularly with an appropriate cleaning agent such as Supergrip® PURGE
SG1578-164 can be used in a variety of general product assembly applications. Additional uses include rigid panel bonding and laminating, seating applications, and door panel laminating.
|Typical Physical Properties|
|Thermosel Viscosity||15,000 cP (120°C)|
|Density||9.6 lb/gallon (1.15 g/cm³)|
|Green Strength (3 min., ambient conditions)||60 psi (410 kN/m²)|
|Open Time||5 – 9 min. for a 10 mil film at ambient conditions|
|ApplicationTemperature||110°C – 120°C|
|Typical Properties of cured film|
|Cure Conditions||7 days @ 25°C, 50% RH|
|Tensile at Break||1,050 psi (7,240 kN/m²)|
|Elongation at Break||830 %|
|Water / Chemical Resistance||Excellent|
|Heat Resistance||379°F (193°C)|