Advances in Reactive Hot-Melt Technology with Thermoplastic Polyurethanes

摘要

Reactive hot-melt(RHM or HMPUR) adhesives are solid prepolymers terminated in reactive groups(-NCO-) manufactured from mixtures of solid and liquid polyester/ether polyols with isocyanates,which are very low in free isocyanates.These solid prepolymers have a lower melting point than conventional hot-melt(HM) adhesives but show final strength and mechanical performance similar to a reactive system.Each of the raw materials can be appropriately adjusted to obtain required pot life,open time,and green strength.