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AssigneeCovestro Deutschland AG
InventorsStefanie Eiden, Rainer Bellinghausen, Klaus Franken
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A recycling method for pyrolysis of scrap, fiber-reinforced polyurethane-poly(meth)acrylate composite material is suggested to recover organic amino compounds and reinforcement material. Said method comprises at least the following steps (a) introduction of a feedstock, comprising at least one fiber reinforced polyurethane-poly(meth)acrylate composite scrap material as defined in claim 1 into a reactor, and; (b) decomposition of the polyurethane-poly(meth)acrylate resin of the introduced fiber reinforced polyurethane-poly(meth)acrylate composite scrap material at a temperature in the range of 350° C. to 700° C. in the presence of one catalyst capable of influencing the thermal decomposition of said scrap material, yielding at least pyrolysate in the gas phase and a pyrolysis residue, comprising at least separated reinforcement material as a solid, wherein (i) during said decomposition the amount of oxygen gas inside the reactor is at most 2,0% by volume of the total volume of the gas phase inside the reactor, and (ii) during said decomposition the pyrolysate is removed from the reactor, and (iii) said pyrolysis residue is removed from the reactor, and; (c) cooling the removed pyrolysate down to a temperature of below 350° C. to yield pyrolysis product, selected from pyrolysate condensate, desublimated pyrolysate or mixtures thereof, and; (d) preferably recovery of reinforcement material and catalyst from pyrolysis residue.
A method for pyrolysis of scrap, fiber-reinforced polyurethane-poly(meth)acrylate composite material, comprising:
A composition, comprising a mixture of at least one fiber-reinforced polyurethane-poly(meth)acrylate composite scrap material and at least one catalyst capable of influencing the thermal decomposition of said scrap material,
Dependencies are inferred from the claim text.