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Sorbothane
Sorbothane is the brand name of a synthetic viscoelastic urethane polymer used as a shock absorber and vibration damper. It is manufactured by Sorbothane, Inc., based in Kent, Ohio.
==History==
Sorbothane was invented and patented in 1982 by Dr. Maurice Hiles,〔https://news.google.com/patents?id=qoQzAAAAEBAJ&zoom=4&pg=PA1#v=onepage&q=&f=false〕 a British inventor. It was prepared by mixing polyol and isocyanate. His research into the energy dissipation properties of human soft tissue disclosed a structure very similar to an interpenetrating polymer network. This led to his synthesis of the first commercial simultaneous interpenetrating network, now called Sorbothane.〔http://www.designnews.com/article/327542-Unique_Urethane_Dampens_Shocks_and_Noise.php〕 Dr. Hiles wrote in his patent "The resulting solid polymer behaves like a quasi-liquid, being readily deformed by an applied force and slow to recover, although in the absence of such a force it takes up a defined shape and volume". In 1976, he contacted the National Research Development Corporation (NRDC) about his invention; the NRDC spent almost £10,000 in helping him to improve and patent the polymer. BTR Industries obtained the license from NRDC for selling them.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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