Polyurethanes

General information

Polyurethanes are organic polymers that are formed by reacting a polyol (an alcohol with more than two reactive hydroxyl groups per molecule) with a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives. Flexible polyurethane forms are used in upholstery, mattresses, chemical-resistant coatings, adhesives, sealants, and packaging. Rigid foams are used in insulation for buildings, water heaters, refrigerated transport, and commercial and residential refrigerators.

In medical practice, polyurethane is used in implants. Complications of polyurethane implants are not uncommon, mainly due to foreign-body reactions [ ], such as with microporous polyurethane (Mitrathane) cardiac patch implants and with breast implants.

Organs and systems