Polyurethanes
Polyurethanes (pronunciation: pol-ee-YUR-uh-thayn) are a type of polymer that are commonly used in a wide variety of applications due to their versatility and durability. They are typically formed by the reaction of a polyol and a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives.
Etymology
The term "Polyurethanes" is derived from the Greek words "poly" meaning many and "urethane", a compound formed from carbamic acid and alcohol.
Types of Polyurethanes
There are several types of polyurethanes, which include flexible polyurethane foam, rigid polyurethane foam, thermoplastic polyurethane, and polyurethane dispersion. Each type has unique properties and uses.
Applications
Polyurethanes are used in a wide range of applications. They are used in the production of flexible foam for furniture, rigid foam for insulation, elastomers for wheels and tires, adhesives, sealants, and coatings for various surfaces.
Health and Safety
While polyurethanes are generally safe to use, they can pose health risks if not handled properly. Exposure to isocyanates, a key ingredient in polyurethanes, can cause irritation to the eyes, skin, and respiratory tract. Long-term exposure can lead to asthma and other respiratory problems.
See Also
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