Recycling of thermosetting polyurethane soft foam
AssigneeStankiewicz GmbH
InventorsCornelia Diessel, Carsten Kliwer, Gerhard Burak, Ehrenfried Blumel, Christoph Kittel
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Abstract
The invention relates to a process for recycling thermosetting polyurethane soft foams in which they are comminuted in a mill, irrespective of their initial shape, density and structure, and are then pressed under the influence of pressure and elevated temperatures to high-strength sheets of various structures.
Claims17
A process for recycling waste thermosetting polyurethane soft foam having a density in the range of 15-1000 kgm.sup.-3 which comprises the steps of comminuting the soft foam to granules, consolidating the comminuted soft foam in a mold under a pressure between 50 and 150 bar and at an elevated temperature between 180.degree. and 210.degree. C. to a final thickness and pressing it, without addition of polymeric binder, for a predetermined pressing time of about 3 to 5 minutes to form a high-strength sheet.
Dependencies are inferred from the claim text.