Polyurethane cavity filling and insulating foam
HR77-AT is a CFC free, closed cell, 2 component hard foam based on polyurethane with a very fine pore structure. It has a cup density of ca. 75 kg/m³ and can be mixed and poured by hand due to the long reaction time. Machine processing reduces the density and start time.
HR77-AT is resistant to diluted acids, bases and water. The B component Type II is used.
Moulded parts and cavity filling:
- Filling cavities
- Filling material for use in taxidermy
- Model heads for wigs
- Increasing stiffness of sandwich construction
- Parts for model construction
Amount used: ca. 75-50 g/l
Start time: ca. 40 seconds
Mixing ratio A:B = 100:145 parts by weight with B component Type II