Rigid polyether polyols foam fabrication

Polyether Polyol Technologies for Rigid Foam Fabrication... 

Glycolysis of flexible PU foams is also possible. At a ratio of PU waste DEG of 1-1.5 1, two layers are formed (the superior layer being rich in polyether), but at a higher ratio of 2-4 1 a homogeneous polyol mixture results, with an hydroxyl number of 360-390 mg KOH/g, which was used successfully in rigid PU foam fabrication [35]. 

The resulting polyol, alone or in combination with classic rigid polyols, polyethers or polyesters, has a good potential use in fabricating rigid PU foams, especially in very reactive systems ( spray foams). 

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