Thermoplastic, thermosetting grafted polyurethane, pure or blended, and thermoset polyurethane obtained after crosslinking

摘要

Thermoplastic polyurethane, either alone or blended with other polymers, are grafted with diisocyanate trimers or blocked isocyanates. The thermoplastic polyurethane is crosslinked at a temperature above 85° C. to make the composition thermosetting. The crosslinked compositions have low compression set and are insoluble in THF.