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polyurethane |
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polyurethaneAny of a class of very versatile polymers that are made into flexible and rigid foams, fibres, elastomers (elastic polymers), surface coatings, and adhesives. They are produced by reacting a diisocyanate (a compound with two functional groups of the type —NCO) with a diol (a compound with two hydroxyl, or —OH, groups). Foamed polyurethanes, used for insulation and mattress and upholstery filler, are made with organic compounds containing carboxyl groups, causing a reaction that liberates carbon dioxide bubbles throughout the product. Spandex fibres are highly elastic and have replaced natural and synthetic rubber fibres for many textile purposes. Polyurethane elastomers are made into auto parts, rollers, flexible molds, medical equipment, and shoe soles. Polyurethane surface coatings are applied as sealants to wood, concrete, and machine parts and as linings for tanks and pipes; moisture-curing polyurethane resin is used as a general-purpose waterproof glue. polyurethane, polyurethan a class of synthetic materials made by copolymerizing an isocyanate and a polyhydric alcohol and commonly used as a foam (polyurethane foam) for insulation and packing, as fibres and hard inert coatings, and in a flexible form (polyurethane rubber) for diaphragms and seals How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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of Singapore as its alliance partner to distribute the company's Gusmer-Decker BetaCell polyurethane equipment to automotive OEMs in the Asia Pacific region. has transferred responsibility for all its spray-applied polyurethane foams (SPF) in the U. com; Boulder City, NV), a small company that currently specializes in tubeless tires for bicycles, golf cars and wheelbarrows, has developed a polyurethane auto tire that it claims can go toe to toe with rubber. |
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