Foamed thermoplastic polyurethanes
AssigneeHuntsman International LLC
InventorsDominicus Limerkens, Johan Van Dijck, Bart Van Edom, Rhona Watson
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Abstract
Process for the preparation of foamed thermoplastic polyurethanes characterized in that the foaming of the thermoplastic polyurethane is carried out in the presence of thermally expandable microspheres.
Claims23
Foamable thermoplastic polyurethane pellet comprising a preformed thermoplastic polyurethane body and thermally expandable hydrocarbon-containing microspheres, at least the thermoplastic polyurethane body being substantially encapsulated by a binding agent comprising a polyisocyanate or prepolymer thereof having an onset temperature for its melt processing which is lower than the onset temperature for the melt processing range of the thermoplastic polyurethane.
Dependencies are inferred from the claim text.