Have you ever wondered just exactly what those magical plastic like substances that can be very soft or very hard, yet still the same substance called polyurethans actually were?
Polyurethanes are very versatile plastics that were originally developed for military use by Otto Bayer in the late 1930's. They are so versatile that they can be made into a compound as soft as bubble-gum, or they can also be formed into compounds that are as hard as a soft metal. This is w
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