Product details and specifications
BT-328L blend polyol is formulated HFC-245fa and water as blowing agent. As an environmental friendly system with 0 ODP, it is widely used for polyurethane foam of discontinuous sandwich panel process. BT-328L blend polyol shows low thermal conductivity, high adhesive strength to the bases of panel and good flow ability.
The fire proof level for resulting foam can approach DIN 4102 norm-Class B3 (Chinese stander GB/T 8624-2012).
Typical liquid propertiesItems Blend polyol BT-328LIsocyanate AppearanceYellow brown viscous liquidbrown viscous liquidViscosity, mPa.s at 20ºC200~800130~400Specific gravity, kg/m3,at 20ºC1.05~1.151.20~1.30Hydroxyl value, mgKOH/g310~380/NCO content, %/31~35Recommended proportion and process conditions Reaction data (Hand-mixing at 20ºC,Stirring speed≥2500rpm)Testing itemUnitsRangeCream timeS4~7Gel timeS25~40Tack free timeS40~60Free raise densityKg/m325.0~27.0Typical foam featureItemUnitsPropertiesCore densityKg/m331~38Initial thermal conductivity,23ºCmW/m.K≤21.0Closed cell content%≥95Compress strengthKPa≥190Dimensional stability,
-30ºC,48h
70ºC,48h
%
≤0.8
≤1.0
FAQ
Our service