Polymer composed of a chain of organic units joined by carbamate (urethane) links
Polyurethane synthesis, wherein the urethane groups −NH−(C=O)−O− link the molecular unitsA kitchen sponge made of polyurethane foam
Polyurethane (/ˌpɒliˈjʊərəˌθeɪn,-jʊəˈrɛθeɪn/;[1] often abbreviated PUR and PU) refers to a class of polymers composed of organic units joined by carbamate (urethane) links. In contrast to other common polymers such as polyethylene and polystyrene, polyurethane is produced from a wide range of starting materials. This chemical variety produces polyurethanes with different chemical structures leading to many different applications. These include rigid and flexible foams, and coatings, adhesives, electrical potting compounds, and fibers such as spandex and polyurethane laminate (PUL). Foams are the largest application accounting for 67% of all polyurethane produced in 2016.[2]
A polyurethane is typically produced by reacting a polymeric isocyanate with a polyol.[3] Since a polyurethane contains two types of monomers, which polymerize one after the other, they are classed as alternating copolymers. Both the isocyanates and polyols used to make a polyurethane contain two or more functional groups per molecule.
Global production in 2019 was 25 million metric tonnes,[4] accounting for about 6% of all polymers produced in that year.
Polyurethane (/ˌpɒliˈjʊərəˌθeɪn, -jʊəˈrɛθeɪn/; often abbreviated PUR and PU) refers to a class of polymers composed of organic units joined by carbamate...
Thermoplastic polyurethane (TPU) is any of a class of polyurethane plastics with many properties, including elasticity, transparency, and resistance to...
Polyurethane foam is a specialist material used for thermal insulation and other applications. It is a solid polymeric foam based on polyurethane chemistry...
Polyurethane laminate (PUL, thermal stretch, fuzzy rubber) is a compound fabric made by laminating a cloth fabric to one or both sides of a thin film of...
contain plant-derived oils (e.g. linseed oil), synthetic oils (e.g. polyurethanes) or resins as their binder in combination with organic solvents. These...
Polyurethane dispersion, or PUD, is understood to be a polyurethane polymer resin dispersed in water, rather than a solvent, although some cosolvent maybe...
leatherette, imitation leather, faux leather, vegan leather, PU leather (polyurethane), and pleather. Artificial leathers are often used in clothing fabrics...
from a material other than latex, such as polyurethane. Internal condoms are typically made from polyurethane and may be used multiple times. With proper...
Polyurethane products have many uses. Over three quarters of the global consumption of polyurethane products is in the form of foams, with flexible and...
mainly of polyurethane with additional chemicals that increase its viscosity and density. It is often referred to as "viscoelastic" polyurethane foam, or...
Moisture-cure polyurethanes -- or polyurethane prepolymer -- are isocyanate-terminated prepolymers that are formulated to cure with ambient water. Cured...
the 2008/2009 coincided with the introduction of polyurethane suits from Speedo (LZR, 50% polyurethane) in 2008 and by Arena (X-Glide), Adidas (Hydrofoil)...
producing polyurethane and polycarbonate raw materials. Products include isocyanates and polyols for cellular foams, thermoplastic polyurethane and polycarbonate...
one-component polyurethane adhesives are also named as moisture-cure polyurethanes. In addition, interactions between polyurethanes and wood polymers...
the 2008–2009 coincided with the introduction of polyurethane suits from Speedo (LZR, 50% polyurethane) in 2008 and by Arena (X-Glide), Adidas (Hydrofoil)...
known as Wanhua Chemical and formerly Yantai Wanhua Polyurethane or Yantai Wanhua Polyurethanes or Yantai Wanhua, is a Chinese listed company in chemical...
may in theory be used to produce polyurethane prepolymers. These then find use in CASE applications. When polyurethane dispersions are synthesized, a prepolymer...
process requires sanding to create a surface for the polyurethane to attach. This allows the polyurethane to bond permanently so it will not bubble even in...
renewable) polyols. Polyether polyols have numerous uses. As an example, polyurethane foam is a big user of polyether polyols. Polyester polyols can be used...
(1902–1982) is credited with the invention of polyurethane in 1937. He succeeded in synthesizing polyurethane foam by exploring his basic idea that mixing...
other methods too. Polyurethanes resins are available waterborne. The single component versions are usually referred to as Polyurethane dispersions (PUD)...
rubber, natural latex or polyurethane. Latex foam rubber, used in mattresses, is well known for its endurance. Polyurethane is a thermosetting polymer...
carbamate like groups −NH−C(=O)−O− are an important family of plastics, the polyurethanes. See Etymology for clarification. While carbamic acids are unstable...
also known as Pure MDI. MDI reacts with polyols in the manufacture of polyurethane. It is the most produced diisocyanate, accounting for 61.3% of the global...
but is almost always referred to as DMDEE (pronounced dumdee) in the polyurethane industry. It is an organic chemical, specifically a nitrogen-oxygen heterocycle...
polymeric resins. These resins are used to formulate different types of polyurethane coatings. Formulations that include neem oil have found wide usage as...
male could transmit an STI. The FC1 female condom was first made from polyurethane. The second generation female condom is called the FC2 and is made from...
Gorilla Glue is an American brand of polyurethane adhesives based in Sharonville, Ohio. They are known for their original Gorilla Glue, which was first...
automobiles for both protective and decorative purposes. Water-based acrylic polyurethane enamel paint is currently the most widely used paint for reasons including...
Ethyl carbamate, a chemical compound which is an ester of carbamic acid Polyurethane, a polymer composed of a chain of organic units joined by carbamate (urethane)...
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