What is polyurethane? What does polyurethane do?

what is polyurethane? full name of polyurethane polyurethane is a general term for macromolecular compounds containing repeating urethane groups on the main chain. polyurethane is a sub-category of urethane in my country, which can also contain ether ester urea biuret urea group and the first polyurethane introduced group. it is formed by the addition polymerization…