polyurethane definition, polyurethane meaning | English dictionary

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polyurethane

  
, polyurethan  
      n   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  
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