POLYURETHANES is validvalid

POLYURETHANE, any of various polymers consisting of organic units joined by NHCOO linkages [n]

183,684 of 196,601 in NWL2023·also valid in CSW24

POLYURETHANE, any of various polymers used esp. in flexible and rigid foams, elastomers, and resins, also POLYURETHAN [n]