Abstract
Polyurethane (PUR) as a thermohardening polymer is difficult to recycle - two current techniques are mechanical
recycling (cutting and rebonding) and up to a certain limit also chemical recycling, in which the polyol component is
recovered through hydrolysis, alcoholysis or glycolysis. The isocyanate component, however, reacts to amines, for
which the current state of the art is to incinerate them. In this project, an alternative route is researched to generate
isocyanates from this remaining fraction, without use of toxic or environmentally unfriendly reagents, to close the
material loop regarding the use of polyurethanes in a sustainable manner.
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